x86: lindent arch/i386/math-emu

lindent these files:
                                       errors   lines of code   errors/KLOC
 arch/x86/math-emu/                      2236            9424         237.2
 arch/x86/math-emu/                       128            8706          14.7

no other changes. No code changed:

   text    data     bss     dec     hex filename
   5589802  612739 3833856 10036397         9924ad vmlinux.before
   5589802  612739 3833856 10036397         9924ad vmlinux.after

the intent of this patch is to ease the automated tracking of kernel
code quality - it's just much easier for us to maintain it if every file
in arch/x86 is supposed to be clean.

NOTE: it is a known problem of lindent that it causes some style damage
of its own, but it's a safe tool (well, except for the gcc array range
initializers extension), so we did the bulk of the changes via lindent,
and did the manual fixups in a followup patch.

the resulting math-emu code has been tested by Thomas Gleixner on a real
386 DX CPU as well, and it works fine.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/math-emu/errors.c

@@ -33,45 +33,41 @@
 #undef PRINT_MESSAGES
 /* */
 
-
 #if 0
 void Un_impl(void)
 {
-  u_char byte1, FPU_modrm;
-  unsigned long address = FPU_ORIG_EIP;
-
-  RE_ENTRANT_CHECK_OFF;
-  /* No need to check access_ok(), we have previously fetched these bytes. */
-  printk("Unimplemented FPU Opcode at eip=%p : ", (void __user *) address);
-  if ( FPU_CS == __USER_CS )
-    {
-      while ( 1 )
-	{
-	  FPU_get_user(byte1, (u_char __user *) address);
-	  if ( (byte1 & 0xf8) == 0xd8 ) break;
-	  printk("[%02x]", byte1);
-	  address++;
+	u_char byte1, FPU_modrm;
+	unsigned long address = FPU_ORIG_EIP;
+
+	RE_ENTRANT_CHECK_OFF;
+	/* No need to check access_ok(), we have previously fetched these bytes. */
+	printk("Unimplemented FPU Opcode at eip=%p : ", (void __user *)address);
+	if (FPU_CS == __USER_CS) {
+		while (1) {
+			FPU_get_user(byte1, (u_char __user *) address);
+			if ((byte1 & 0xf8) == 0xd8)
+				break;
+			printk("[%02x]", byte1);
+			address++;
+		}
+		printk("%02x ", byte1);
+		FPU_get_user(FPU_modrm, 1 + (u_char __user *) address);
+
+		if (FPU_modrm >= 0300)
+			printk("%02x (%02x+%d)\n", FPU_modrm, FPU_modrm & 0xf8,
+			       FPU_modrm & 7);
+		else
+			printk("/%d\n", (FPU_modrm >> 3) & 7);
+	} else {
+		printk("cs selector = %04x\n", FPU_CS);
 	}
-      printk("%02x ", byte1);
-      FPU_get_user(FPU_modrm, 1 + (u_char __user *) address);
-      
-      if (FPU_modrm >= 0300)
-	printk("%02x (%02x+%d)\n", FPU_modrm, FPU_modrm & 0xf8, FPU_modrm & 7);
-      else
-	printk("/%d\n", (FPU_modrm >> 3) & 7);
-    }
-  else
-    {
-      printk("cs selector = %04x\n", FPU_CS);
-    }
-
-  RE_ENTRANT_CHECK_ON;
-
-  EXCEPTION(EX_Invalid);
 
-}
-#endif  /*  0  */
+	RE_ENTRANT_CHECK_ON;
 
+	EXCEPTION(EX_Invalid);
+
+}
+#endif /*  0  */
 
 /*
    Called for opcodes which are illegal and which are known to result in a
@@ -79,139 +75,152 @@ void Un_impl(void)
    */
 void FPU_illegal(void)
 {
-  math_abort(FPU_info,SIGILL);
+	math_abort(FPU_info, SIGILL);
 }
 
-
-
 void FPU_printall(void)
 {
-  int i;
-  static const char *tag_desc[] = { "Valid", "Zero", "ERROR", "Empty",
-                              "DeNorm", "Inf", "NaN" };
-  u_char byte1, FPU_modrm;
-  unsigned long address = FPU_ORIG_EIP;
-
-  RE_ENTRANT_CHECK_OFF;
-  /* No need to check access_ok(), we have previously fetched these bytes. */
-  printk("At %p:", (void *) address);
-  if ( FPU_CS == __USER_CS )
-    {
+	int i;
+	static const char *tag_desc[] = { "Valid", "Zero", "ERROR", "Empty",
+		"DeNorm", "Inf", "NaN"
+	};
+	u_char byte1, FPU_modrm;
+	unsigned long address = FPU_ORIG_EIP;
+
+	RE_ENTRANT_CHECK_OFF;
+	/* No need to check access_ok(), we have previously fetched these bytes. */
+	printk("At %p:", (void *)address);
+	if (FPU_CS == __USER_CS) {
 #define MAX_PRINTED_BYTES 20
-      for ( i = 0; i < MAX_PRINTED_BYTES; i++ )
-	{
-	  FPU_get_user(byte1, (u_char __user *) address);
-	  if ( (byte1 & 0xf8) == 0xd8 )
-	    {
-	      printk(" %02x", byte1);
-	      break;
-	    }
-	  printk(" [%02x]", byte1);
-	  address++;
-	}
-      if ( i == MAX_PRINTED_BYTES )
-	printk(" [more..]\n");
-      else
-	{
-	  FPU_get_user(FPU_modrm, 1 + (u_char __user *) address);
-	  
-	  if (FPU_modrm >= 0300)
-	    printk(" %02x (%02x+%d)\n", FPU_modrm, FPU_modrm & 0xf8, FPU_modrm & 7);
-	  else
-	    printk(" /%d, mod=%d rm=%d\n",
-		   (FPU_modrm >> 3) & 7, (FPU_modrm >> 6) & 3, FPU_modrm & 7);
+		for (i = 0; i < MAX_PRINTED_BYTES; i++) {
+			FPU_get_user(byte1, (u_char __user *) address);
+			if ((byte1 & 0xf8) == 0xd8) {
+				printk(" %02x", byte1);
+				break;
+			}
+			printk(" [%02x]", byte1);
+			address++;
+		}
+		if (i == MAX_PRINTED_BYTES)
+			printk(" [more..]\n");
+		else {
+			FPU_get_user(FPU_modrm, 1 + (u_char __user *) address);
+
+			if (FPU_modrm >= 0300)
+				printk(" %02x (%02x+%d)\n", FPU_modrm,
+				       FPU_modrm & 0xf8, FPU_modrm & 7);
+			else
+				printk(" /%d, mod=%d rm=%d\n",
+				       (FPU_modrm >> 3) & 7,
+				       (FPU_modrm >> 6) & 3, FPU_modrm & 7);
+		}
+	} else {
+		printk("%04x\n", FPU_CS);
 	}
-    }
-  else
-    {
-      printk("%04x\n", FPU_CS);
-    }
 
-  partial_status = status_word();
+	partial_status = status_word();
 
 #ifdef DEBUGGING
-if ( partial_status & SW_Backward )    printk("SW: backward compatibility\n");
-if ( partial_status & SW_C3 )          printk("SW: condition bit 3\n");
-if ( partial_status & SW_C2 )          printk("SW: condition bit 2\n");
-if ( partial_status & SW_C1 )          printk("SW: condition bit 1\n");
-if ( partial_status & SW_C0 )          printk("SW: condition bit 0\n");
-if ( partial_status & SW_Summary )     printk("SW: exception summary\n");
-if ( partial_status & SW_Stack_Fault ) printk("SW: stack fault\n");
-if ( partial_status & SW_Precision )   printk("SW: loss of precision\n");
-if ( partial_status & SW_Underflow )   printk("SW: underflow\n");
-if ( partial_status & SW_Overflow )    printk("SW: overflow\n");
-if ( partial_status & SW_Zero_Div )    printk("SW: divide by zero\n");
-if ( partial_status & SW_Denorm_Op )   printk("SW: denormalized operand\n");
-if ( partial_status & SW_Invalid )     printk("SW: invalid operation\n");
+	if (partial_status & SW_Backward)
+		printk("SW: backward compatibility\n");
+	if (partial_status & SW_C3)
+		printk("SW: condition bit 3\n");
+	if (partial_status & SW_C2)
+		printk("SW: condition bit 2\n");
+	if (partial_status & SW_C1)
+		printk("SW: condition bit 1\n");
+	if (partial_status & SW_C0)
+		printk("SW: condition bit 0\n");
+	if (partial_status & SW_Summary)
+		printk("SW: exception summary\n");
+	if (partial_status & SW_Stack_Fault)
+		printk("SW: stack fault\n");
+	if (partial_status & SW_Precision)
+		printk("SW: loss of precision\n");
+	if (partial_status & SW_Underflow)
+		printk("SW: underflow\n");
+	if (partial_status & SW_Overflow)
+		printk("SW: overflow\n");
+	if (partial_status & SW_Zero_Div)
+		printk("SW: divide by zero\n");
+	if (partial_status & SW_Denorm_Op)
+		printk("SW: denormalized operand\n");
+	if (partial_status & SW_Invalid)
+		printk("SW: invalid operation\n");
 #endif /* DEBUGGING */
 
-  printk(" SW: b=%d st=%ld es=%d sf=%d cc=%d%d%d%d ef=%d%d%d%d%d%d\n",
-	 partial_status & 0x8000 ? 1 : 0,   /* busy */
-	 (partial_status & 0x3800) >> 11,   /* stack top pointer */
-	 partial_status & 0x80 ? 1 : 0,     /* Error summary status */
-	 partial_status & 0x40 ? 1 : 0,     /* Stack flag */
-	 partial_status & SW_C3?1:0, partial_status & SW_C2?1:0, /* cc */
-	 partial_status & SW_C1?1:0, partial_status & SW_C0?1:0, /* cc */
-	 partial_status & SW_Precision?1:0, partial_status & SW_Underflow?1:0,
-	 partial_status & SW_Overflow?1:0, partial_status & SW_Zero_Div?1:0,
-	 partial_status & SW_Denorm_Op?1:0, partial_status & SW_Invalid?1:0);
-  
-printk(" CW: ic=%d rc=%ld%ld pc=%ld%ld iem=%d     ef=%d%d%d%d%d%d\n",
-	 control_word & 0x1000 ? 1 : 0,
-	 (control_word & 0x800) >> 11, (control_word & 0x400) >> 10,
-	 (control_word & 0x200) >> 9, (control_word & 0x100) >> 8,
-	 control_word & 0x80 ? 1 : 0,
-	 control_word & SW_Precision?1:0, control_word & SW_Underflow?1:0,
-	 control_word & SW_Overflow?1:0, control_word & SW_Zero_Div?1:0,
-	 control_word & SW_Denorm_Op?1:0, control_word & SW_Invalid?1:0);
-
-  for ( i = 0; i < 8; i++ )
-    {
-      FPU_REG *r = &st(i);
-      u_char tagi = FPU_gettagi(i);
-      switch (tagi)
-	{
-	case TAG_Empty:
-	  continue;
-	  break;
-	case TAG_Zero:
-	case TAG_Special:
-	  tagi = FPU_Special(r);
-	case TAG_Valid:
-	  printk("st(%d)  %c .%04lx %04lx %04lx %04lx e%+-6d ", i,
-		 getsign(r) ? '-' : '+',
-		 (long)(r->sigh >> 16),
-		 (long)(r->sigh & 0xFFFF),
-		 (long)(r->sigl >> 16),
-		 (long)(r->sigl & 0xFFFF),
-		 exponent(r) - EXP_BIAS + 1);
-	  break;
-	default:
-	  printk("Whoops! Error in errors.c: tag%d is %d ", i, tagi);
-	  continue;
-	  break;
+	printk(" SW: b=%d st=%ld es=%d sf=%d cc=%d%d%d%d ef=%d%d%d%d%d%d\n", partial_status & 0x8000 ? 1 : 0,	/* busy */
+	       (partial_status & 0x3800) >> 11,	/* stack top pointer */
+	       partial_status & 0x80 ? 1 : 0,	/* Error summary status */
+	       partial_status & 0x40 ? 1 : 0,	/* Stack flag */
+	       partial_status & SW_C3 ? 1 : 0, partial_status & SW_C2 ? 1 : 0,	/* cc */
+	       partial_status & SW_C1 ? 1 : 0, partial_status & SW_C0 ? 1 : 0,	/* cc */
+	       partial_status & SW_Precision ? 1 : 0,
+	       partial_status & SW_Underflow ? 1 : 0,
+	       partial_status & SW_Overflow ? 1 : 0,
+	       partial_status & SW_Zero_Div ? 1 : 0,
+	       partial_status & SW_Denorm_Op ? 1 : 0,
+	       partial_status & SW_Invalid ? 1 : 0);
+
+	printk(" CW: ic=%d rc=%ld%ld pc=%ld%ld iem=%d     ef=%d%d%d%d%d%d\n",
+	       control_word & 0x1000 ? 1 : 0,
+	       (control_word & 0x800) >> 11, (control_word & 0x400) >> 10,
+	       (control_word & 0x200) >> 9, (control_word & 0x100) >> 8,
+	       control_word & 0x80 ? 1 : 0,
+	       control_word & SW_Precision ? 1 : 0,
+	       control_word & SW_Underflow ? 1 : 0,
+	       control_word & SW_Overflow ? 1 : 0,
+	       control_word & SW_Zero_Div ? 1 : 0,
+	       control_word & SW_Denorm_Op ? 1 : 0,
+	       control_word & SW_Invalid ? 1 : 0);
+
+	for (i = 0; i < 8; i++) {
+		FPU_REG *r = &st(i);
+		u_char tagi = FPU_gettagi(i);
+		switch (tagi) {
+		case TAG_Empty:
+			continue;
+			break;
+		case TAG_Zero:
+		case TAG_Special:
+			tagi = FPU_Special(r);
+		case TAG_Valid:
+			printk("st(%d)  %c .%04lx %04lx %04lx %04lx e%+-6d ", i,
+			       getsign(r) ? '-' : '+',
+			       (long)(r->sigh >> 16),
+			       (long)(r->sigh & 0xFFFF),
+			       (long)(r->sigl >> 16),
+			       (long)(r->sigl & 0xFFFF),
+			       exponent(r) - EXP_BIAS + 1);
+			break;
+		default:
+			printk("Whoops! Error in errors.c: tag%d is %d ", i,
+			       tagi);
+			continue;
+			break;
+		}
+		printk("%s\n", tag_desc[(int)(unsigned)tagi]);
 	}
-      printk("%s\n", tag_desc[(int) (unsigned) tagi]);
-    }
 
-  RE_ENTRANT_CHECK_ON;
+	RE_ENTRANT_CHECK_ON;
 
 }
 
 static struct {
-  int type;
-  const char *name;
+	int type;
+	const char *name;
 } exception_names[] = {
-  { EX_StackOver, "stack overflow" },
-  { EX_StackUnder, "stack underflow" },
-  { EX_Precision, "loss of precision" },
-  { EX_Underflow, "underflow" },
-  { EX_Overflow, "overflow" },
-  { EX_ZeroDiv, "divide by zero" },
-  { EX_Denormal, "denormalized operand" },
-  { EX_Invalid, "invalid operation" },
-  { EX_INTERNAL, "INTERNAL BUG in "FPU_VERSION },
-  { 0, NULL }
+	{
+	EX_StackOver, "stack overflow"}, {
+	EX_StackUnder, "stack underflow"}, {
+	EX_Precision, "loss of precision"}, {
+	EX_Underflow, "underflow"}, {
+	EX_Overflow, "overflow"}, {
+	EX_ZeroDiv, "divide by zero"}, {
+	EX_Denormal, "denormalized operand"}, {
+	EX_Invalid, "invalid operation"}, {
+	EX_INTERNAL, "INTERNAL BUG in " FPU_VERSION}, {
+	0, NULL}
 };
 
 /*
@@ -295,445 +304,386 @@ static struct {
 
 asmlinkage void FPU_exception(int n)
 {
-  int i, int_type;
-
-  int_type = 0;         /* Needed only to stop compiler warnings */
-  if ( n & EX_INTERNAL )
-    {
-      int_type = n - EX_INTERNAL;
-      n = EX_INTERNAL;
-      /* Set lots of exception bits! */
-      partial_status |= (SW_Exc_Mask | SW_Summary | SW_Backward);
-    }
-  else
-    {
-      /* Extract only the bits which we use to set the status word */
-      n &= (SW_Exc_Mask);
-      /* Set the corresponding exception bit */
-      partial_status |= n;
-      /* Set summary bits iff exception isn't masked */
-      if ( partial_status & ~control_word & CW_Exceptions )
-	partial_status |= (SW_Summary | SW_Backward);
-      if ( n & (SW_Stack_Fault | EX_Precision) )
-	{
-	  if ( !(n & SW_C1) )
-	    /* This bit distinguishes over- from underflow for a stack fault,
-	       and roundup from round-down for precision loss. */
-	    partial_status &= ~SW_C1;
+	int i, int_type;
+
+	int_type = 0;		/* Needed only to stop compiler warnings */
+	if (n & EX_INTERNAL) {
+		int_type = n - EX_INTERNAL;
+		n = EX_INTERNAL;
+		/* Set lots of exception bits! */
+		partial_status |= (SW_Exc_Mask | SW_Summary | SW_Backward);
+	} else {
+		/* Extract only the bits which we use to set the status word */
+		n &= (SW_Exc_Mask);
+		/* Set the corresponding exception bit */
+		partial_status |= n;
+		/* Set summary bits iff exception isn't masked */
+		if (partial_status & ~control_word & CW_Exceptions)
+			partial_status |= (SW_Summary | SW_Backward);
+		if (n & (SW_Stack_Fault | EX_Precision)) {
+			if (!(n & SW_C1))
+				/* This bit distinguishes over- from underflow for a stack fault,
+				   and roundup from round-down for precision loss. */
+				partial_status &= ~SW_C1;
+		}
 	}
-    }
 
-  RE_ENTRANT_CHECK_OFF;
-  if ( (~control_word & n & CW_Exceptions) || (n == EX_INTERNAL) )
-    {
+	RE_ENTRANT_CHECK_OFF;
+	if ((~control_word & n & CW_Exceptions) || (n == EX_INTERNAL)) {
 #ifdef PRINT_MESSAGES
-      /* My message from the sponsor */
-      printk(FPU_VERSION" "__DATE__" (C) W. Metzenthen.\n");
+		/* My message from the sponsor */
+		printk(FPU_VERSION " " __DATE__ " (C) W. Metzenthen.\n");
 #endif /* PRINT_MESSAGES */
-      
-      /* Get a name string for error reporting */
-      for (i=0; exception_names[i].type; i++)
-	if ( (exception_names[i].type & n) == exception_names[i].type )
-	  break;
-      
-      if (exception_names[i].type)
-	{
+
+		/* Get a name string for error reporting */
+		for (i = 0; exception_names[i].type; i++)
+			if ((exception_names[i].type & n) ==
+			    exception_names[i].type)
+				break;
+
+		if (exception_names[i].type) {
 #ifdef PRINT_MESSAGES
-	  printk("FP Exception: %s!\n", exception_names[i].name);
+			printk("FP Exception: %s!\n", exception_names[i].name);
 #endif /* PRINT_MESSAGES */
-	}
-      else
-	printk("FPU emulator: Unknown Exception: 0x%04x!\n", n);
-      
-      if ( n == EX_INTERNAL )
-	{
-	  printk("FPU emulator: Internal error type 0x%04x\n", int_type);
-	  FPU_printall();
-	}
+		} else
+			printk("FPU emulator: Unknown Exception: 0x%04x!\n", n);
+
+		if (n == EX_INTERNAL) {
+			printk("FPU emulator: Internal error type 0x%04x\n",
+			       int_type);
+			FPU_printall();
+		}
 #ifdef PRINT_MESSAGES
-      else
-	FPU_printall();
+		else
+			FPU_printall();
 #endif /* PRINT_MESSAGES */
 
-      /*
-       * The 80486 generates an interrupt on the next non-control FPU
-       * instruction. So we need some means of flagging it.
-       * We use the ES (Error Summary) bit for this.
-       */
-    }
-  RE_ENTRANT_CHECK_ON;
+		/*
+		 * The 80486 generates an interrupt on the next non-control FPU
+		 * instruction. So we need some means of flagging it.
+		 * We use the ES (Error Summary) bit for this.
+		 */
+	}
+	RE_ENTRANT_CHECK_ON;
 
 #ifdef __DEBUG__
-  math_abort(FPU_info,SIGFPE);
+	math_abort(FPU_info, SIGFPE);
 #endif /* __DEBUG__ */
 
 }
 
-
 /* Real operation attempted on a NaN. */
 /* Returns < 0 if the exception is unmasked */
-int real_1op_NaN(FPU_REG *a)
+int real_1op_NaN(FPU_REG * a)
 {
-  int signalling, isNaN;
-
-  isNaN = (exponent(a) == EXP_OVER) && (a->sigh & 0x80000000);
-
-  /* The default result for the case of two "equal" NaNs (signs may
-     differ) is chosen to reproduce 80486 behaviour */
-  signalling = isNaN && !(a->sigh & 0x40000000);
-
-  if ( !signalling )
-    {
-      if ( !isNaN )  /* pseudo-NaN, or other unsupported? */
-	{
-	  if ( control_word & CW_Invalid )
-	    {
-	      /* Masked response */
-	      reg_copy(&CONST_QNaN, a);
-	    }
-	  EXCEPTION(EX_Invalid);
-	  return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Special;
+	int signalling, isNaN;
+
+	isNaN = (exponent(a) == EXP_OVER) && (a->sigh & 0x80000000);
+
+	/* The default result for the case of two "equal" NaNs (signs may
+	   differ) is chosen to reproduce 80486 behaviour */
+	signalling = isNaN && !(a->sigh & 0x40000000);
+
+	if (!signalling) {
+		if (!isNaN) {	/* pseudo-NaN, or other unsupported? */
+			if (control_word & CW_Invalid) {
+				/* Masked response */
+				reg_copy(&CONST_QNaN, a);
+			}
+			EXCEPTION(EX_Invalid);
+			return (!(control_word & CW_Invalid) ? FPU_Exception :
+				0) | TAG_Special;
+		}
+		return TAG_Special;
 	}
-      return TAG_Special;
-    }
 
-  if ( control_word & CW_Invalid )
-    {
-      /* The masked response */
-      if ( !(a->sigh & 0x80000000) )  /* pseudo-NaN ? */
-	{
-	  reg_copy(&CONST_QNaN, a);
+	if (control_word & CW_Invalid) {
+		/* The masked response */
+		if (!(a->sigh & 0x80000000)) {	/* pseudo-NaN ? */
+			reg_copy(&CONST_QNaN, a);
+		}
+		/* ensure a Quiet NaN */
+		a->sigh |= 0x40000000;
 	}
-      /* ensure a Quiet NaN */
-      a->sigh |= 0x40000000;
-    }
 
-  EXCEPTION(EX_Invalid);
+	EXCEPTION(EX_Invalid);
 
-  return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Special;
+	return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Special;
 }
 
-
 /* Real operation attempted on two operands, one a NaN. */
 /* Returns < 0 if the exception is unmasked */
 int real_2op_NaN(FPU_REG const *b, u_char tagb,
-		 int deststnr,
-		 FPU_REG const *defaultNaN)
+		 int deststnr, FPU_REG const *defaultNaN)
 {
-  FPU_REG *dest = &st(deststnr);
-  FPU_REG const *a = dest;
-  u_char taga = FPU_gettagi(deststnr);
-  FPU_REG const *x;
-  int signalling, unsupported;
-
-  if ( taga == TAG_Special )
-    taga = FPU_Special(a);
-  if ( tagb == TAG_Special )
-    tagb = FPU_Special(b);
-
-  /* TW_NaN is also used for unsupported data types. */
-  unsupported = ((taga == TW_NaN)
-		 && !((exponent(a) == EXP_OVER) && (a->sigh & 0x80000000)))
-    || ((tagb == TW_NaN)
-	&& !((exponent(b) == EXP_OVER) && (b->sigh & 0x80000000)));
-  if ( unsupported )
-    {
-      if ( control_word & CW_Invalid )
-	{
-	  /* Masked response */
-	  FPU_copy_to_regi(&CONST_QNaN, TAG_Special, deststnr);
-	}
-      EXCEPTION(EX_Invalid);
-      return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Special;
-    }
-
-  if (taga == TW_NaN)
-    {
-      x = a;
-      if (tagb == TW_NaN)
-	{
-	  signalling = !(a->sigh & b->sigh & 0x40000000);
-	  if ( significand(b) > significand(a) )
-	    x = b;
-	  else if ( significand(b) == significand(a) )
-	    {
-	      /* The default result for the case of two "equal" NaNs (signs may
-		 differ) is chosen to reproduce 80486 behaviour */
-	      x = defaultNaN;
-	    }
-	}
-      else
-	{
-	  /* return the quiet version of the NaN in a */
-	  signalling = !(a->sigh & 0x40000000);
+	FPU_REG *dest = &st(deststnr);
+	FPU_REG const *a = dest;
+	u_char taga = FPU_gettagi(deststnr);
+	FPU_REG const *x;
+	int signalling, unsupported;
+
+	if (taga == TAG_Special)
+		taga = FPU_Special(a);
+	if (tagb == TAG_Special)
+		tagb = FPU_Special(b);
+
+	/* TW_NaN is also used for unsupported data types. */
+	unsupported = ((taga == TW_NaN)
+		       && !((exponent(a) == EXP_OVER)
+			    && (a->sigh & 0x80000000)))
+	    || ((tagb == TW_NaN)
+		&& !((exponent(b) == EXP_OVER) && (b->sigh & 0x80000000)));
+	if (unsupported) {
+		if (control_word & CW_Invalid) {
+			/* Masked response */
+			FPU_copy_to_regi(&CONST_QNaN, TAG_Special, deststnr);
+		}
+		EXCEPTION(EX_Invalid);
+		return (!(control_word & CW_Invalid) ? FPU_Exception : 0) |
+		    TAG_Special;
 	}
-    }
-  else
+
+	if (taga == TW_NaN) {
+		x = a;
+		if (tagb == TW_NaN) {
+			signalling = !(a->sigh & b->sigh & 0x40000000);
+			if (significand(b) > significand(a))
+				x = b;
+			else if (significand(b) == significand(a)) {
+				/* The default result for the case of two "equal" NaNs (signs may
+				   differ) is chosen to reproduce 80486 behaviour */
+				x = defaultNaN;
+			}
+		} else {
+			/* return the quiet version of the NaN in a */
+			signalling = !(a->sigh & 0x40000000);
+		}
+	} else
 #ifdef PARANOID
-    if (tagb == TW_NaN)
+	if (tagb == TW_NaN)
 #endif /* PARANOID */
-    {
-      signalling = !(b->sigh & 0x40000000);
-      x = b;
-    }
+	{
+		signalling = !(b->sigh & 0x40000000);
+		x = b;
+	}
 #ifdef PARANOID
-  else
-    {
-      signalling = 0;
-      EXCEPTION(EX_INTERNAL|0x113);
-      x = &CONST_QNaN;
-    }
+	else {
+		signalling = 0;
+		EXCEPTION(EX_INTERNAL | 0x113);
+		x = &CONST_QNaN;
+	}
 #endif /* PARANOID */
 
-  if ( (!signalling) || (control_word & CW_Invalid) )
-    {
-      if ( ! x )
-	x = b;
+	if ((!signalling) || (control_word & CW_Invalid)) {
+		if (!x)
+			x = b;
 
-      if ( !(x->sigh & 0x80000000) )  /* pseudo-NaN ? */
-	x = &CONST_QNaN;
+		if (!(x->sigh & 0x80000000))	/* pseudo-NaN ? */
+			x = &CONST_QNaN;
 
-      FPU_copy_to_regi(x, TAG_Special, deststnr);
+		FPU_copy_to_regi(x, TAG_Special, deststnr);
 
-      if ( !signalling )
-	return TAG_Special;
+		if (!signalling)
+			return TAG_Special;
 
-      /* ensure a Quiet NaN */
-      dest->sigh |= 0x40000000;
-    }
+		/* ensure a Quiet NaN */
+		dest->sigh |= 0x40000000;
+	}
 
-  EXCEPTION(EX_Invalid);
+	EXCEPTION(EX_Invalid);
 
-  return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Special;
+	return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Special;
 }
 
-
 /* Invalid arith operation on Valid registers */
 /* Returns < 0 if the exception is unmasked */
 asmlinkage int arith_invalid(int deststnr)
 {
 
-  EXCEPTION(EX_Invalid);
-  
-  if ( control_word & CW_Invalid )
-    {
-      /* The masked response */
-      FPU_copy_to_regi(&CONST_QNaN, TAG_Special, deststnr);
-    }
-  
-  return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Valid;
+	EXCEPTION(EX_Invalid);
 
-}
+	if (control_word & CW_Invalid) {
+		/* The masked response */
+		FPU_copy_to_regi(&CONST_QNaN, TAG_Special, deststnr);
+	}
 
+	return (!(control_word & CW_Invalid) ? FPU_Exception : 0) | TAG_Valid;
+
+}
 
 /* Divide a finite number by zero */
 asmlinkage int FPU_divide_by_zero(int deststnr, u_char sign)
 {
-  FPU_REG *dest = &st(deststnr);
-  int tag = TAG_Valid;
+	FPU_REG *dest = &st(deststnr);
+	int tag = TAG_Valid;
+
+	if (control_word & CW_ZeroDiv) {
+		/* The masked response */
+		FPU_copy_to_regi(&CONST_INF, TAG_Special, deststnr);
+		setsign(dest, sign);
+		tag = TAG_Special;
+	}
 
-  if ( control_word & CW_ZeroDiv )
-    {
-      /* The masked response */
-      FPU_copy_to_regi(&CONST_INF, TAG_Special, deststnr);
-      setsign(dest, sign);
-      tag = TAG_Special;
-    }
- 
-  EXCEPTION(EX_ZeroDiv);
+	EXCEPTION(EX_ZeroDiv);
 
-  return (!(control_word & CW_ZeroDiv) ? FPU_Exception : 0) | tag;
+	return (!(control_word & CW_ZeroDiv) ? FPU_Exception : 0) | tag;
 
 }
 
-
 /* This may be called often, so keep it lean */
 int set_precision_flag(int flags)
 {
-  if ( control_word & CW_Precision )
-    {
-      partial_status &= ~(SW_C1 & flags);
-      partial_status |= flags;   /* The masked response */
-      return 0;
-    }
-  else
-    {
-      EXCEPTION(flags);
-      return 1;
-    }
+	if (control_word & CW_Precision) {
+		partial_status &= ~(SW_C1 & flags);
+		partial_status |= flags;	/* The masked response */
+		return 0;
+	} else {
+		EXCEPTION(flags);
+		return 1;
+	}
 }
 
-
 /* This may be called often, so keep it lean */
 asmlinkage void set_precision_flag_up(void)
 {
-  if ( control_word & CW_Precision )
-    partial_status |= (SW_Precision | SW_C1);   /* The masked response */
-  else
-    EXCEPTION(EX_Precision | SW_C1);
+	if (control_word & CW_Precision)
+		partial_status |= (SW_Precision | SW_C1);	/* The masked response */
+	else
+		EXCEPTION(EX_Precision | SW_C1);
 }
 
-
 /* This may be called often, so keep it lean */
 asmlinkage void set_precision_flag_down(void)
 {
-  if ( control_word & CW_Precision )
-    {   /* The masked response */
-      partial_status &= ~SW_C1;
-      partial_status |= SW_Precision;
-    }
-  else
-    EXCEPTION(EX_Precision);
+	if (control_word & CW_Precision) {	/* The masked response */
+		partial_status &= ~SW_C1;
+		partial_status |= SW_Precision;
+	} else
+		EXCEPTION(EX_Precision);
 }
 
-
 asmlinkage int denormal_operand(void)
 {
-  if ( control_word & CW_Denormal )
-    {   /* The masked response */
-      partial_status |= SW_Denorm_Op;
-      return TAG_Special;
-    }
-  else
-    {
-      EXCEPTION(EX_Denormal);
-      return TAG_Special | FPU_Exception;
-    }
+	if (control_word & CW_Denormal) {	/* The masked response */
+		partial_status |= SW_Denorm_Op;
+		return TAG_Special;
+	} else {
+		EXCEPTION(EX_Denormal);
+		return TAG_Special | FPU_Exception;
+	}
 }
 
-
-asmlinkage int arith_overflow(FPU_REG *dest)
+asmlinkage int arith_overflow(FPU_REG * dest)
 {
-  int tag = TAG_Valid;
+	int tag = TAG_Valid;
 
-  if ( control_word & CW_Overflow )
-    {
-      /* The masked response */
+	if (control_word & CW_Overflow) {
+		/* The masked response */
 /* ###### The response here depends upon the rounding mode */
-      reg_copy(&CONST_INF, dest);
-      tag = TAG_Special;
-    }
-  else
-    {
-      /* Subtract the magic number from the exponent */
-      addexponent(dest, (-3 * (1 << 13)));
-    }
-
-  EXCEPTION(EX_Overflow);
-  if ( control_word & CW_Overflow )
-    {
-      /* The overflow exception is masked. */
-      /* By definition, precision is lost.
-	 The roundup bit (C1) is also set because we have
-	 "rounded" upwards to Infinity. */
-      EXCEPTION(EX_Precision | SW_C1);
-      return tag;
-    }
-
-  return tag;
+		reg_copy(&CONST_INF, dest);
+		tag = TAG_Special;
+	} else {
+		/* Subtract the magic number from the exponent */
+		addexponent(dest, (-3 * (1 << 13)));
+	}
 
-}
+	EXCEPTION(EX_Overflow);
+	if (control_word & CW_Overflow) {
+		/* The overflow exception is masked. */
+		/* By definition, precision is lost.
+		   The roundup bit (C1) is also set because we have
+		   "rounded" upwards to Infinity. */
+		EXCEPTION(EX_Precision | SW_C1);
+		return tag;
+	}
 
+	return tag;
 
-asmlinkage int arith_underflow(FPU_REG *dest)
-{
-  int tag = TAG_Valid;
+}
 
-  if ( control_word & CW_Underflow )
-    {
-      /* The masked response */
-      if ( exponent16(dest) <= EXP_UNDER - 63 )
-	{
-	  reg_copy(&CONST_Z, dest);
-	  partial_status &= ~SW_C1;       /* Round down. */
-	  tag = TAG_Zero;
+asmlinkage int arith_underflow(FPU_REG * dest)
+{
+	int tag = TAG_Valid;
+
+	if (control_word & CW_Underflow) {
+		/* The masked response */
+		if (exponent16(dest) <= EXP_UNDER - 63) {
+			reg_copy(&CONST_Z, dest);
+			partial_status &= ~SW_C1;	/* Round down. */
+			tag = TAG_Zero;
+		} else {
+			stdexp(dest);
+		}
+	} else {
+		/* Add the magic number to the exponent. */
+		addexponent(dest, (3 * (1 << 13)) + EXTENDED_Ebias);
 	}
-      else
-	{
-	  stdexp(dest);
+
+	EXCEPTION(EX_Underflow);
+	if (control_word & CW_Underflow) {
+		/* The underflow exception is masked. */
+		EXCEPTION(EX_Precision);
+		return tag;
 	}
-    }
-  else
-    {
-      /* Add the magic number to the exponent. */
-      addexponent(dest, (3 * (1 << 13)) + EXTENDED_Ebias);
-    }
-
-  EXCEPTION(EX_Underflow);
-  if ( control_word & CW_Underflow )
-    {
-      /* The underflow exception is masked. */
-      EXCEPTION(EX_Precision);
-      return tag;
-    }
-
-  return tag;
 
-}
+	return tag;
 
+}
 
 void FPU_stack_overflow(void)
 {
 
- if ( control_word & CW_Invalid )
-    {
-      /* The masked response */
-      top--;
-      FPU_copy_to_reg0(&CONST_QNaN, TAG_Special);
-    }
+	if (control_word & CW_Invalid) {
+		/* The masked response */
+		top--;
+		FPU_copy_to_reg0(&CONST_QNaN, TAG_Special);
+	}
 
-  EXCEPTION(EX_StackOver);
+	EXCEPTION(EX_StackOver);
 
-  return;
+	return;
 
 }
 
-
 void FPU_stack_underflow(void)
 {
 
- if ( control_word & CW_Invalid )
-    {
-      /* The masked response */
-      FPU_copy_to_reg0(&CONST_QNaN, TAG_Special);
-    }
+	if (control_word & CW_Invalid) {
+		/* The masked response */
+		FPU_copy_to_reg0(&CONST_QNaN, TAG_Special);
+	}
 
-  EXCEPTION(EX_StackUnder);
+	EXCEPTION(EX_StackUnder);
 
-  return;
+	return;
 
 }
 
-
 void FPU_stack_underflow_i(int i)
 {
 
- if ( control_word & CW_Invalid )
-    {
-      /* The masked response */
-      FPU_copy_to_regi(&CONST_QNaN, TAG_Special, i);
-    }
+	if (control_word & CW_Invalid) {
+		/* The masked response */
+		FPU_copy_to_regi(&CONST_QNaN, TAG_Special, i);
+	}
 
-  EXCEPTION(EX_StackUnder);
+	EXCEPTION(EX_StackUnder);
 
-  return;
+	return;
 
 }
 
-
 void FPU_stack_underflow_pop(int i)
 {
 
- if ( control_word & CW_Invalid )
-    {
-      /* The masked response */
-      FPU_copy_to_regi(&CONST_QNaN, TAG_Special, i);
-      FPU_pop();
-    }
+	if (control_word & CW_Invalid) {
+		/* The masked response */
+		FPU_copy_to_regi(&CONST_QNaN, TAG_Special, i);
+		FPU_pop();
+	}
 
-  EXCEPTION(EX_StackUnder);
+	EXCEPTION(EX_StackUnder);
 
-  return;
+	return;
 
 }
-

arch/x86/math-emu/exception.h

@@ -9,7 +9,6 @@
 #ifndef _EXCEPTION_H_
 #define _EXCEPTION_H_
 
-
 #ifdef __ASSEMBLY__
 #define	Const_(x)	$##x
 #else
@@ -20,8 +19,8 @@
 #include "fpu_emu.h"
 #endif /* SW_C1 */
 
-#define FPU_BUSY        Const_(0x8000)   /* FPU busy bit (8087 compatibility) */
-#define EX_ErrorSummary Const_(0x0080)   /* Error summary status */
+#define FPU_BUSY        Const_(0x8000)	/* FPU busy bit (8087 compatibility) */
+#define EX_ErrorSummary Const_(0x0080)	/* Error summary status */
 /* Special exceptions: */
 #define	EX_INTERNAL	Const_(0x8000)	/* Internal error in wm-FPU-emu */
 #define EX_StackOver	Const_(0x0041|SW_C1)	/* stack overflow */
@@ -34,11 +33,9 @@
 #define EX_Denormal	Const_(0x0002)	/* denormalized operand */
 #define EX_Invalid	Const_(0x0001)	/* invalid operation */
 
-
 #define PRECISION_LOST_UP    Const_((EX_Precision | SW_C1))
 #define PRECISION_LOST_DOWN  Const_(EX_Precision)
 
-
 #ifndef __ASSEMBLY__
 
 #ifdef DEBUG
@@ -48,6 +45,6 @@
 #define	EXCEPTION(x)	FPU_exception(x)
 #endif
 
-#endif /* __ASSEMBLY__ */ 
+#endif /* __ASSEMBLY__ */
 
 #endif /* _EXCEPTION_H_ */

arch/x86/math-emu/fpu_arith.c

@@ -15,160 +15,138 @@
 #include "control_w.h"
 #include "status_w.h"
 
-
 void fadd__(void)
 {
-  /* fadd st,st(i) */
-  int i = FPU_rm;
-  clear_C1();
-  FPU_add(&st(i), FPU_gettagi(i), 0, control_word);
+	/* fadd st,st(i) */
+	int i = FPU_rm;
+	clear_C1();
+	FPU_add(&st(i), FPU_gettagi(i), 0, control_word);
 }
 
-
 void fmul__(void)
 {
-  /* fmul st,st(i) */
-  int i = FPU_rm;
-  clear_C1();
-  FPU_mul(&st(i), FPU_gettagi(i), 0, control_word);
+	/* fmul st,st(i) */
+	int i = FPU_rm;
+	clear_C1();
+	FPU_mul(&st(i), FPU_gettagi(i), 0, control_word);
 }
 
-
-
 void fsub__(void)
 {
-  /* fsub st,st(i) */
-  clear_C1();
-  FPU_sub(0, FPU_rm, control_word);
+	/* fsub st,st(i) */
+	clear_C1();
+	FPU_sub(0, FPU_rm, control_word);
 }
 
-
 void fsubr_(void)
 {
-  /* fsubr st,st(i) */
-  clear_C1();
-  FPU_sub(REV, FPU_rm, control_word);
+	/* fsubr st,st(i) */
+	clear_C1();
+	FPU_sub(REV, FPU_rm, control_word);
 }
 
-
 void fdiv__(void)
 {
-  /* fdiv st,st(i) */
-  clear_C1();
-  FPU_div(0, FPU_rm, control_word);
+	/* fdiv st,st(i) */
+	clear_C1();
+	FPU_div(0, FPU_rm, control_word);
 }
 
-
 void fdivr_(void)
 {
-  /* fdivr st,st(i) */
-  clear_C1();
-  FPU_div(REV, FPU_rm, control_word);
+	/* fdivr st,st(i) */
+	clear_C1();
+	FPU_div(REV, FPU_rm, control_word);
 }
 
-
-
 void fadd_i(void)
 {
-  /* fadd st(i),st */
-  int i = FPU_rm;
-  clear_C1();
-  FPU_add(&st(i), FPU_gettagi(i), i, control_word);
+	/* fadd st(i),st */
+	int i = FPU_rm;
+	clear_C1();
+	FPU_add(&st(i), FPU_gettagi(i), i, control_word);
 }
 
-
 void fmul_i(void)
 {
-  /* fmul st(i),st */
-  clear_C1();
-  FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word);
+	/* fmul st(i),st */
+	clear_C1();
+	FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word);
 }
 
-
 void fsubri(void)
 {
-  /* fsubr st(i),st */
-  clear_C1();
-  FPU_sub(DEST_RM, FPU_rm, control_word);
+	/* fsubr st(i),st */
+	clear_C1();
+	FPU_sub(DEST_RM, FPU_rm, control_word);
 }
 
-
 void fsub_i(void)
 {
-  /* fsub st(i),st */
-  clear_C1();
-  FPU_sub(REV|DEST_RM, FPU_rm, control_word);
+	/* fsub st(i),st */
+	clear_C1();
+	FPU_sub(REV | DEST_RM, FPU_rm, control_word);
 }
 
-
 void fdivri(void)
 {
-  /* fdivr st(i),st */
-  clear_C1();
-  FPU_div(DEST_RM, FPU_rm, control_word);
+	/* fdivr st(i),st */
+	clear_C1();
+	FPU_div(DEST_RM, FPU_rm, control_word);
 }
 
-
 void fdiv_i(void)
 {
-  /* fdiv st(i),st */
-  clear_C1();
-  FPU_div(REV|DEST_RM, FPU_rm, control_word);
+	/* fdiv st(i),st */
+	clear_C1();
+	FPU_div(REV | DEST_RM, FPU_rm, control_word);
 }
 
-
-
 void faddp_(void)
 {
-  /* faddp st(i),st */
-  int i = FPU_rm;
-  clear_C1();
-  if ( FPU_add(&st(i), FPU_gettagi(i), i, control_word) >= 0 )
-    FPU_pop();
+	/* faddp st(i),st */
+	int i = FPU_rm;
+	clear_C1();
+	if (FPU_add(&st(i), FPU_gettagi(i), i, control_word) >= 0)
+		FPU_pop();
 }
 
-
 void fmulp_(void)
 {
-  /* fmulp st(i),st */
-  clear_C1();
-  if ( FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word) >= 0 )
-    FPU_pop();
+	/* fmulp st(i),st */
+	clear_C1();
+	if (FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word) >= 0)
+		FPU_pop();
 }
 
-
-
 void fsubrp(void)
 {
-  /* fsubrp st(i),st */
-  clear_C1();
-  if ( FPU_sub(DEST_RM, FPU_rm, control_word) >= 0 )
-    FPU_pop();
+	/* fsubrp st(i),st */
+	clear_C1();
+	if (FPU_sub(DEST_RM, FPU_rm, control_word) >= 0)
+		FPU_pop();
 }
 
-
 void fsubp_(void)
 {
-  /* fsubp st(i),st */
-  clear_C1();
-  if ( FPU_sub(REV|DEST_RM, FPU_rm, control_word) >= 0 )
-    FPU_pop();
+	/* fsubp st(i),st */
+	clear_C1();
+	if (FPU_sub(REV | DEST_RM, FPU_rm, control_word) >= 0)
+		FPU_pop();
 }
 
-
 void fdivrp(void)
 {
-  /* fdivrp st(i),st */
-  clear_C1();
-  if ( FPU_div(DEST_RM, FPU_rm, control_word) >= 0 )
-    FPU_pop();
+	/* fdivrp st(i),st */
+	clear_C1();
+	if (FPU_div(DEST_RM, FPU_rm, control_word) >= 0)
+		FPU_pop();
 }
 
-
 void fdivp_(void)
 {
-  /* fdivp st(i),st */
-  clear_C1();
-  if ( FPU_div(REV|DEST_RM, FPU_rm, control_word) >= 0 )
-    FPU_pop();
+	/* fdivp st(i),st */
+	clear_C1();
+	if (FPU_div(REV | DEST_RM, FPU_rm, control_word) >= 0)
+		FPU_pop();
 }

arch/x86/math-emu/fpu_asm.h

@@ -14,7 +14,6 @@
 
 #define	EXCEPTION	FPU_exception
 
-
 #define PARAM1	8(%ebp)
 #define	PARAM2	12(%ebp)
 #define	PARAM3	16(%ebp)

arch/x86/math-emu/fpu_aux.c

@@ -16,34 +16,34 @@
 #include "status_w.h"
 #include "control_w.h"
 
-
 static void fnop(void)
 {
 }
 
 static void fclex(void)
 {
-  partial_status &= ~(SW_Backward|SW_Summary|SW_Stack_Fault|SW_Precision|
-		   SW_Underflow|SW_Overflow|SW_Zero_Div|SW_Denorm_Op|
-		   SW_Invalid);
-  no_ip_update = 1;
+	partial_status &=
+	    ~(SW_Backward | SW_Summary | SW_Stack_Fault | SW_Precision |
+	      SW_Underflow | SW_Overflow | SW_Zero_Div | SW_Denorm_Op |
+	      SW_Invalid);
+	no_ip_update = 1;
 }
 
 /* Needs to be externally visible */
 void finit(void)
 {
-  control_word = 0x037f;
-  partial_status = 0;
-  top = 0;            /* We don't keep top in the status word internally. */
-  fpu_tag_word = 0xffff;
-  /* The behaviour is different from that detailed in
-     Section 15.1.6 of the Intel manual */
-  operand_address.offset = 0;
-  operand_address.selector = 0;
-  instruction_address.offset = 0;
-  instruction_address.selector = 0;
-  instruction_address.opcode = 0;
-  no_ip_update = 1;
+	control_word = 0x037f;
+	partial_status = 0;
+	top = 0;		/* We don't keep top in the status word internally. */
+	fpu_tag_word = 0xffff;
+	/* The behaviour is different from that detailed in
+	   Section 15.1.6 of the Intel manual */
+	operand_address.offset = 0;
+	operand_address.selector = 0;
+	instruction_address.offset = 0;
+	instruction_address.selector = 0;
+	instruction_address.opcode = 0;
+	no_ip_update = 1;
 }
 
 /*
@@ -54,151 +54,134 @@ void finit(void)
 #define fsetpm fnop
 
 static FUNC const finit_table[] = {
-  feni, fdisi, fclex, finit,
-  fsetpm, FPU_illegal, FPU_illegal, FPU_illegal
+	feni, fdisi, fclex, finit,
+	fsetpm, FPU_illegal, FPU_illegal, FPU_illegal
 };
 
 void finit_(void)
 {
-  (finit_table[FPU_rm])();
+	(finit_table[FPU_rm]) ();
 }
 
-
 static void fstsw_ax(void)
 {
-  *(short *) &FPU_EAX = status_word();
-  no_ip_update = 1;
+	*(short *)&FPU_EAX = status_word();
+	no_ip_update = 1;
 }
 
 static FUNC const fstsw_table[] = {
-  fstsw_ax, FPU_illegal, FPU_illegal, FPU_illegal,
-  FPU_illegal, FPU_illegal, FPU_illegal, FPU_illegal
+	fstsw_ax, FPU_illegal, FPU_illegal, FPU_illegal,
+	FPU_illegal, FPU_illegal, FPU_illegal, FPU_illegal
 };
 
 void fstsw_(void)
 {
-  (fstsw_table[FPU_rm])();
+	(fstsw_table[FPU_rm]) ();
 }
 
-
 static FUNC const fp_nop_table[] = {
-  fnop, FPU_illegal, FPU_illegal, FPU_illegal,
-  FPU_illegal, FPU_illegal, FPU_illegal, FPU_illegal
+	fnop, FPU_illegal, FPU_illegal, FPU_illegal,
+	FPU_illegal, FPU_illegal, FPU_illegal, FPU_illegal
 };
 
 void fp_nop(void)
 {
-  (fp_nop_table[FPU_rm])();
+	(fp_nop_table[FPU_rm]) ();
 }
 
-
 void fld_i_(void)
 {
-  FPU_REG *st_new_ptr;
-  int i;
-  u_char tag;
-
-  if ( STACK_OVERFLOW )
-    { FPU_stack_overflow(); return; }
-
-  /* fld st(i) */
-  i = FPU_rm;
-  if ( NOT_EMPTY(i) )
-    {
-      reg_copy(&st(i), st_new_ptr);
-      tag = FPU_gettagi(i);
-      push();
-      FPU_settag0(tag);
-    }
-  else
-    {
-      if ( control_word & CW_Invalid )
-	{
-	  /* The masked response */
-	  FPU_stack_underflow();
+	FPU_REG *st_new_ptr;
+	int i;
+	u_char tag;
+
+	if (STACK_OVERFLOW) {
+		FPU_stack_overflow();
+		return;
 	}
-      else
-	EXCEPTION(EX_StackUnder);
-    }
 
-}
+	/* fld st(i) */
+	i = FPU_rm;
+	if (NOT_EMPTY(i)) {
+		reg_copy(&st(i), st_new_ptr);
+		tag = FPU_gettagi(i);
+		push();
+		FPU_settag0(tag);
+	} else {
+		if (control_word & CW_Invalid) {
+			/* The masked response */
+			FPU_stack_underflow();
+		} else
+			EXCEPTION(EX_StackUnder);
+	}
 
+}
 
 void fxch_i(void)
 {
-  /* fxch st(i) */
-  FPU_REG t;
-  int i = FPU_rm;
-  FPU_REG *st0_ptr = &st(0), *sti_ptr = &st(i);
-  long tag_word = fpu_tag_word;
-  int regnr = top & 7, regnri = ((regnr + i) & 7);
-  u_char st0_tag = (tag_word >> (regnr*2)) & 3;
-  u_char sti_tag = (tag_word >> (regnri*2)) & 3;
-
-  if ( st0_tag == TAG_Empty )
-    {
-      if ( sti_tag == TAG_Empty )
-	{
-	  FPU_stack_underflow();
-	  FPU_stack_underflow_i(i);
-	  return;
+	/* fxch st(i) */
+	FPU_REG t;
+	int i = FPU_rm;
+	FPU_REG *st0_ptr = &st(0), *sti_ptr = &st(i);
+	long tag_word = fpu_tag_word;
+	int regnr = top & 7, regnri = ((regnr + i) & 7);
+	u_char st0_tag = (tag_word >> (regnr * 2)) & 3;
+	u_char sti_tag = (tag_word >> (regnri * 2)) & 3;
+
+	if (st0_tag == TAG_Empty) {
+		if (sti_tag == TAG_Empty) {
+			FPU_stack_underflow();
+			FPU_stack_underflow_i(i);
+			return;
+		}
+		if (control_word & CW_Invalid) {
+			/* Masked response */
+			FPU_copy_to_reg0(sti_ptr, sti_tag);
+		}
+		FPU_stack_underflow_i(i);
+		return;
 	}
-      if ( control_word & CW_Invalid )
-	{
-	  /* Masked response */
-	  FPU_copy_to_reg0(sti_ptr, sti_tag);
+	if (sti_tag == TAG_Empty) {
+		if (control_word & CW_Invalid) {
+			/* Masked response */
+			FPU_copy_to_regi(st0_ptr, st0_tag, i);
+		}
+		FPU_stack_underflow();
+		return;
 	}
-      FPU_stack_underflow_i(i);
-      return;
-    }
-  if ( sti_tag == TAG_Empty )
-    {
-      if ( control_word & CW_Invalid )
-	{
-	  /* Masked response */
-	  FPU_copy_to_regi(st0_ptr, st0_tag, i);
-	}
-      FPU_stack_underflow();
-      return;
-    }
-  clear_C1();
-
-  reg_copy(st0_ptr, &t);
-  reg_copy(sti_ptr, st0_ptr);
-  reg_copy(&t, sti_ptr);
-
-  tag_word &= ~(3 << (regnr*2)) & ~(3 << (regnri*2));
-  tag_word |= (sti_tag << (regnr*2)) | (st0_tag << (regnri*2));
-  fpu_tag_word = tag_word;
-}
+	clear_C1();
 
+	reg_copy(st0_ptr, &t);
+	reg_copy(sti_ptr, st0_ptr);
+	reg_copy(&t, sti_ptr);
+
+	tag_word &= ~(3 << (regnr * 2)) & ~(3 << (regnri * 2));
+	tag_word |= (sti_tag << (regnr * 2)) | (st0_tag << (regnri * 2));
+	fpu_tag_word = tag_word;
+}
 
 void ffree_(void)
 {
-  /* ffree st(i) */
-  FPU_settagi(FPU_rm, TAG_Empty);
+	/* ffree st(i) */
+	FPU_settagi(FPU_rm, TAG_Empty);
 }
 
-
 void ffreep(void)
 {
-  /* ffree st(i) + pop - unofficial code */
-  FPU_settagi(FPU_rm, TAG_Empty);
-  FPU_pop();
+	/* ffree st(i) + pop - unofficial code */
+	FPU_settagi(FPU_rm, TAG_Empty);
+	FPU_pop();
 }
 
-
 void fst_i_(void)
 {
-  /* fst st(i) */
-  FPU_copy_to_regi(&st(0), FPU_gettag0(), FPU_rm);
+	/* fst st(i) */
+	FPU_copy_to_regi(&st(0), FPU_gettag0(), FPU_rm);
 }
 
-
 void fstp_i(void)
 {
-  /* fstp st(i) */
-  FPU_copy_to_regi(&st(0), FPU_gettag0(), FPU_rm);
-  FPU_pop();
+	/* fstp st(i) */
+	FPU_copy_to_regi(&st(0), FPU_gettag0(), FPU_rm);
+	FPU_pop();
 }
-

arch/x86/math-emu/fpu_emu.h

@@ -7,7 +7,6 @@
  |                                                                           |
  +---------------------------------------------------------------------------*/
 
-
 #ifndef _FPU_EMU_H_
 #define _FPU_EMU_H_
 
@@ -28,15 +27,15 @@
 #endif
 
 #define EXP_BIAS	Const(0)
-#define EXP_OVER	Const(0x4000)    /* smallest invalid large exponent */
-#define	EXP_UNDER	Const(-0x3fff)   /* largest invalid small exponent */
-#define EXP_WAY_UNDER   Const(-0x6000)   /* Below the smallest denormal, but
-					    still a 16 bit nr. */
+#define EXP_OVER	Const(0x4000)	/* smallest invalid large exponent */
+#define	EXP_UNDER	Const(-0x3fff)	/* largest invalid small exponent */
+#define EXP_WAY_UNDER   Const(-0x6000)	/* Below the smallest denormal, but
+					   still a 16 bit nr. */
 #define EXP_Infinity    EXP_OVER
 #define EXP_NaN         EXP_OVER
 
 #define EXTENDED_Ebias Const(0x3fff)
-#define EXTENDED_Emin (-0x3ffe)  /* smallest valid exponent */
+#define EXTENDED_Emin (-0x3ffe)	/* smallest valid exponent */
 
 #define SIGN_POS	Const(0)
 #define SIGN_NEG	Const(0x80)
@@ -44,10 +43,9 @@
 #define SIGN_Positive	Const(0)
 #define SIGN_Negative	Const(0x8000)
 
-
 /* Keep the order TAG_Valid, TAG_Zero, TW_Denormal */
 /* The following fold to 2 (Special) in the Tag Word */
-#define TW_Denormal     Const(4)        /* De-normal */
+#define TW_Denormal     Const(4)	/* De-normal */
 #define TW_Infinity	Const(5)	/* + or - infinity */
 #define	TW_NaN		Const(6)	/* Not a Number */
 #define	TW_Unsupported	Const(7)	/* Not supported by an 80486 */
@@ -67,14 +65,13 @@
 #define DEST_RM         0x20
 #define LOADED          0x40
 
-#define FPU_Exception   Const(0x80000000)   /* Added to tag returns. */
-
+#define FPU_Exception   Const(0x80000000)	/* Added to tag returns. */
 
 #ifndef __ASSEMBLY__
 
 #include "fpu_system.h"
 
-#include <asm/sigcontext.h>   /* for struct _fpstate */
+#include <asm/sigcontext.h>	/* for struct _fpstate */
 #include <asm/math_emu.h>
 #include <linux/linkage.h>
 
@@ -112,30 +109,33 @@ extern u_char emulating;
 #define PREFIX_DEFAULT 7
 
 struct address {
-  unsigned int offset;
-  unsigned int selector:16;
-  unsigned int opcode:11;
-  unsigned int empty:5;
+	unsigned int offset;
+	unsigned int selector:16;
+	unsigned int opcode:11;
+	unsigned int empty:5;
 };
 struct fpu__reg {
-  unsigned sigl;
-  unsigned sigh;
-  short exp;
+	unsigned sigl;
+	unsigned sigh;
+	short exp;
 };
 
-typedef void (*FUNC)(void);
+typedef void (*FUNC) (void);
 typedef struct fpu__reg FPU_REG;
-typedef void (*FUNC_ST0)(FPU_REG *st0_ptr, u_char st0_tag);
-typedef struct { u_char address_size, operand_size, segment; }
-        overrides;
+typedef void (*FUNC_ST0) (FPU_REG * st0_ptr, u_char st0_tag);
+typedef struct {
+	u_char address_size, operand_size, segment;
+} overrides;
 /* This structure is 32 bits: */
-typedef struct { overrides override;
-		 u_char default_mode; } fpu_addr_modes;
+typedef struct {
+	overrides override;
+	u_char default_mode;
+} fpu_addr_modes;
 /* PROTECTED has a restricted meaning in the emulator; it is used
    to signal that the emulator needs to do special things to ensure
    that protection is respected in a segmented model. */
 #define PROTECTED 4
-#define SIXTEEN   1         /* We rely upon this being 1 (true) */
+#define SIXTEEN   1		/* We rely upon this being 1 (true) */
 #define VM86      SIXTEEN
 #define PM16      (SIXTEEN | PROTECTED)
 #define SEG32     PROTECTED
@@ -166,10 +166,10 @@ extern u_char const data_sizes_16[32];
 #define signpositive(a) ( (signbyte(a) & 0x80) == 0 )
 #define signnegative(a) (signbyte(a) & 0x80)
 
-static inline void reg_copy(FPU_REG const *x, FPU_REG *y)
+static inline void reg_copy(FPU_REG const *x, FPU_REG * y)
 {
-  *(short *)&(y->exp) = *(const short *)&(x->exp); 
-  *(long long *)&(y->sigl) = *(const long long *)&(x->sigl);
+	*(short *)&(y->exp) = *(const short *)&(x->exp);
+	*(long long *)&(y->sigl) = *(const long long *)&(x->sigl);
 }
 
 #define exponent(x)  (((*(short *)&((x)->exp)) & 0x7fff) - EXTENDED_Ebias)
@@ -184,29 +184,28 @@ static inline void reg_copy(FPU_REG const *x, FPU_REG *y)
 
 #define significand(x) ( ((unsigned long long *)&((x)->sigl))[0] )
 
-
 /*----- Prototypes for functions written in assembler -----*/
 /* extern void reg_move(FPU_REG *a, FPU_REG *b); */
 
-asmlinkage int FPU_normalize(FPU_REG *x);
-asmlinkage int FPU_normalize_nuo(FPU_REG *x);
+asmlinkage int FPU_normalize(FPU_REG * x);
+asmlinkage int FPU_normalize_nuo(FPU_REG * x);
 asmlinkage int FPU_u_sub(FPU_REG const *arg1, FPU_REG const *arg2,
-			 FPU_REG *answ, unsigned int control_w, u_char sign,
+			 FPU_REG * answ, unsigned int control_w, u_char sign,
 			 int expa, int expb);
 asmlinkage int FPU_u_mul(FPU_REG const *arg1, FPU_REG const *arg2,
-			 FPU_REG *answ, unsigned int control_w, u_char sign,
+			 FPU_REG * answ, unsigned int control_w, u_char sign,
 			 int expon);
 asmlinkage int FPU_u_div(FPU_REG const *arg1, FPU_REG const *arg2,
-			 FPU_REG *answ, unsigned int control_w, u_char sign);
+			 FPU_REG * answ, unsigned int control_w, u_char sign);
 asmlinkage int FPU_u_add(FPU_REG const *arg1, FPU_REG const *arg2,
-			 FPU_REG *answ, unsigned int control_w, u_char sign,
+			 FPU_REG * answ, unsigned int control_w, u_char sign,
 			 int expa, int expb);
-asmlinkage int wm_sqrt(FPU_REG *n, int dummy1, int dummy2,
+asmlinkage int wm_sqrt(FPU_REG * n, int dummy1, int dummy2,
 		       unsigned int control_w, u_char sign);
-asmlinkage unsigned	FPU_shrx(void *l, unsigned x);
-asmlinkage unsigned	FPU_shrxs(void *v, unsigned x);
+asmlinkage unsigned FPU_shrx(void *l, unsigned x);
+asmlinkage unsigned FPU_shrxs(void *v, unsigned x);
 asmlinkage unsigned long FPU_div_small(unsigned long long *x, unsigned long y);
-asmlinkage int FPU_round(FPU_REG *arg, unsigned int extent, int dummy,
+asmlinkage int FPU_round(FPU_REG * arg, unsigned int extent, int dummy,
 			 unsigned int control_w, u_char sign);
 
 #ifndef MAKING_PROTO

arch/x86/math-emu/fpu_entry.c

@@ -36,726 +36,720 @@
 #include "control_w.h"
 #include "status_w.h"
 
-#define __BAD__ FPU_illegal   /* Illegal on an 80486, causes SIGILL */
+#define __BAD__ FPU_illegal	/* Illegal on an 80486, causes SIGILL */
 
-#ifndef NO_UNDOC_CODE    /* Un-documented FPU op-codes supported by default. */
+#ifndef NO_UNDOC_CODE		/* Un-documented FPU op-codes supported by default. */
 
 /* WARNING: These codes are not documented by Intel in their 80486 manual
    and may not work on FPU clones or later Intel FPUs. */
 
 /* Changes to support the un-doc codes provided by Linus Torvalds. */
 
-#define _d9_d8_ fstp_i    /* unofficial code (19) */
-#define _dc_d0_ fcom_st   /* unofficial code (14) */
-#define _dc_d8_ fcompst   /* unofficial code (1c) */
-#define _dd_c8_ fxch_i    /* unofficial code (0d) */
-#define _de_d0_ fcompst   /* unofficial code (16) */
-#define _df_c0_ ffreep    /* unofficial code (07) ffree + pop */
-#define _df_c8_ fxch_i    /* unofficial code (0f) */
-#define _df_d0_ fstp_i    /* unofficial code (17) */
-#define _df_d8_ fstp_i    /* unofficial code (1f) */
+#define _d9_d8_ fstp_i		/* unofficial code (19) */
+#define _dc_d0_ fcom_st		/* unofficial code (14) */
+#define _dc_d8_ fcompst		/* unofficial code (1c) */
+#define _dd_c8_ fxch_i		/* unofficial code (0d) */
+#define _de_d0_ fcompst		/* unofficial code (16) */
+#define _df_c0_ ffreep		/* unofficial code (07) ffree + pop */
+#define _df_c8_ fxch_i		/* unofficial code (0f) */
+#define _df_d0_ fstp_i		/* unofficial code (17) */
+#define _df_d8_ fstp_i		/* unofficial code (1f) */
 
 static FUNC const st_instr_table[64] = {
-  fadd__,   fld_i_,     __BAD__, __BAD__, fadd_i,  ffree_,  faddp_,  _df_c0_,
-  fmul__,   fxch_i,     __BAD__, __BAD__, fmul_i,  _dd_c8_, fmulp_,  _df_c8_,
-  fcom_st,  fp_nop,     __BAD__, __BAD__, _dc_d0_, fst_i_,  _de_d0_, _df_d0_,
-  fcompst,  _d9_d8_,    __BAD__, __BAD__, _dc_d8_, fstp_i,  fcompp,  _df_d8_,
-  fsub__,   FPU_etc,    __BAD__, finit_,  fsubri,  fucom_,  fsubrp,  fstsw_,
-  fsubr_,   fconst,     fucompp, __BAD__, fsub_i,  fucomp,  fsubp_,  __BAD__,
-  fdiv__,   FPU_triga,  __BAD__, __BAD__, fdivri,  __BAD__, fdivrp,  __BAD__,
-  fdivr_,   FPU_trigb,  __BAD__, __BAD__, fdiv_i,  __BAD__, fdivp_,  __BAD__,
+	fadd__, fld_i_, __BAD__, __BAD__, fadd_i, ffree_, faddp_, _df_c0_,
+	fmul__, fxch_i, __BAD__, __BAD__, fmul_i, _dd_c8_, fmulp_, _df_c8_,
+	fcom_st, fp_nop, __BAD__, __BAD__, _dc_d0_, fst_i_, _de_d0_, _df_d0_,
+	fcompst, _d9_d8_, __BAD__, __BAD__, _dc_d8_, fstp_i, fcompp, _df_d8_,
+	fsub__, FPU_etc, __BAD__, finit_, fsubri, fucom_, fsubrp, fstsw_,
+	fsubr_, fconst, fucompp, __BAD__, fsub_i, fucomp, fsubp_, __BAD__,
+	fdiv__, FPU_triga, __BAD__, __BAD__, fdivri, __BAD__, fdivrp, __BAD__,
+	fdivr_, FPU_trigb, __BAD__, __BAD__, fdiv_i, __BAD__, fdivp_, __BAD__,
 };
 
-#else     /* Support only documented FPU op-codes */
+#else /* Support only documented FPU op-codes */
 
 static FUNC const st_instr_table[64] = {
-  fadd__,   fld_i_,     __BAD__, __BAD__, fadd_i,  ffree_,  faddp_,  __BAD__,
-  fmul__,   fxch_i,     __BAD__, __BAD__, fmul_i,  __BAD__, fmulp_,  __BAD__,
-  fcom_st,  fp_nop,     __BAD__, __BAD__, __BAD__, fst_i_,  __BAD__, __BAD__,
-  fcompst,  __BAD__,    __BAD__, __BAD__, __BAD__, fstp_i,  fcompp,  __BAD__,
-  fsub__,   FPU_etc,    __BAD__, finit_,  fsubri,  fucom_,  fsubrp,  fstsw_,
-  fsubr_,   fconst,     fucompp, __BAD__, fsub_i,  fucomp,  fsubp_,  __BAD__,
-  fdiv__,   FPU_triga,  __BAD__, __BAD__, fdivri,  __BAD__, fdivrp,  __BAD__,
-  fdivr_,   FPU_trigb,  __BAD__, __BAD__, fdiv_i,  __BAD__, fdivp_,  __BAD__,
+	fadd__, fld_i_, __BAD__, __BAD__, fadd_i, ffree_, faddp_, __BAD__,
+	fmul__, fxch_i, __BAD__, __BAD__, fmul_i, __BAD__, fmulp_, __BAD__,
+	fcom_st, fp_nop, __BAD__, __BAD__, __BAD__, fst_i_, __BAD__, __BAD__,
+	fcompst, __BAD__, __BAD__, __BAD__, __BAD__, fstp_i, fcompp, __BAD__,
+	fsub__, FPU_etc, __BAD__, finit_, fsubri, fucom_, fsubrp, fstsw_,
+	fsubr_, fconst, fucompp, __BAD__, fsub_i, fucomp, fsubp_, __BAD__,
+	fdiv__, FPU_triga, __BAD__, __BAD__, fdivri, __BAD__, fdivrp, __BAD__,
+	fdivr_, FPU_trigb, __BAD__, __BAD__, fdiv_i, __BAD__, fdivp_, __BAD__,
 };
 
 #endif /* NO_UNDOC_CODE */
 
-
-#define _NONE_ 0   /* Take no special action */
-#define _REG0_ 1   /* Need to check for not empty st(0) */
-#define _REGI_ 2   /* Need to check for not empty st(0) and st(rm) */
-#define _REGi_ 0   /* Uses st(rm) */
-#define _PUSH_ 3   /* Need to check for space to push onto stack */
-#define _null_ 4   /* Function illegal or not implemented */
-#define _REGIi 5   /* Uses st(0) and st(rm), result to st(rm) */
-#define _REGIp 6   /* Uses st(0) and st(rm), result to st(rm) then pop */
-#define _REGIc 0   /* Compare st(0) and st(rm) */
-#define _REGIn 0   /* Uses st(0) and st(rm), but handle checks later */
+#define _NONE_ 0		/* Take no special action */
+#define _REG0_ 1		/* Need to check for not empty st(0) */
+#define _REGI_ 2		/* Need to check for not empty st(0) and st(rm) */
+#define _REGi_ 0		/* Uses st(rm) */
+#define _PUSH_ 3		/* Need to check for space to push onto stack */
+#define _null_ 4		/* Function illegal or not implemented */
+#define _REGIi 5		/* Uses st(0) and st(rm), result to st(rm) */
+#define _REGIp 6		/* Uses st(0) and st(rm), result to st(rm) then pop */
+#define _REGIc 0		/* Compare st(0) and st(rm) */
+#define _REGIn 0		/* Uses st(0) and st(rm), but handle checks later */
 
 #ifndef NO_UNDOC_CODE
 
 /* Un-documented FPU op-codes supported by default. (see above) */
 
 static u_char const type_table[64] = {
-  _REGI_, _NONE_, _null_, _null_, _REGIi, _REGi_, _REGIp, _REGi_,
-  _REGI_, _REGIn, _null_, _null_, _REGIi, _REGI_, _REGIp, _REGI_,
-  _REGIc, _NONE_, _null_, _null_, _REGIc, _REG0_, _REGIc, _REG0_,
-  _REGIc, _REG0_, _null_, _null_, _REGIc, _REG0_, _REGIc, _REG0_,
-  _REGI_, _NONE_, _null_, _NONE_, _REGIi, _REGIc, _REGIp, _NONE_,
-  _REGI_, _NONE_, _REGIc, _null_, _REGIi, _REGIc, _REGIp, _null_,
-  _REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_,
-  _REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_
+	_REGI_, _NONE_, _null_, _null_, _REGIi, _REGi_, _REGIp, _REGi_,
+	_REGI_, _REGIn, _null_, _null_, _REGIi, _REGI_, _REGIp, _REGI_,
+	_REGIc, _NONE_, _null_, _null_, _REGIc, _REG0_, _REGIc, _REG0_,
+	_REGIc, _REG0_, _null_, _null_, _REGIc, _REG0_, _REGIc, _REG0_,
+	_REGI_, _NONE_, _null_, _NONE_, _REGIi, _REGIc, _REGIp, _NONE_,
+	_REGI_, _NONE_, _REGIc, _null_, _REGIi, _REGIc, _REGIp, _null_,
+	_REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_,
+	_REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_
 };
 
-#else     /* Support only documented FPU op-codes */
+#else /* Support only documented FPU op-codes */
 
 static u_char const type_table[64] = {
-  _REGI_, _NONE_, _null_, _null_, _REGIi, _REGi_, _REGIp, _null_,
-  _REGI_, _REGIn, _null_, _null_, _REGIi, _null_, _REGIp, _null_,
-  _REGIc, _NONE_, _null_, _null_, _null_, _REG0_, _null_, _null_,
-  _REGIc, _null_, _null_, _null_, _null_, _REG0_, _REGIc, _null_,
-  _REGI_, _NONE_, _null_, _NONE_, _REGIi, _REGIc, _REGIp, _NONE_,
-  _REGI_, _NONE_, _REGIc, _null_, _REGIi, _REGIc, _REGIp, _null_,
-  _REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_,
-  _REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_
+	_REGI_, _NONE_, _null_, _null_, _REGIi, _REGi_, _REGIp, _null_,
+	_REGI_, _REGIn, _null_, _null_, _REGIi, _null_, _REGIp, _null_,
+	_REGIc, _NONE_, _null_, _null_, _null_, _REG0_, _null_, _null_,
+	_REGIc, _null_, _null_, _null_, _null_, _REG0_, _REGIc, _null_,
+	_REGI_, _NONE_, _null_, _NONE_, _REGIi, _REGIc, _REGIp, _NONE_,
+	_REGI_, _NONE_, _REGIc, _null_, _REGIi, _REGIc, _REGIp, _null_,
+	_REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_,
+	_REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_
 };
 
 #endif /* NO_UNDOC_CODE */
 
-
 #ifdef RE_ENTRANT_CHECKING
-u_char emulating=0;
+u_char emulating = 0;
 #endif /* RE_ENTRANT_CHECKING */
 
-static int valid_prefix(u_char *Byte, u_char __user **fpu_eip,
-			overrides *override);
+static int valid_prefix(u_char * Byte, u_char __user ** fpu_eip,
+			overrides * override);
 
 asmlinkage void math_emulate(long arg)
 {
-  u_char  FPU_modrm, byte1;
-  unsigned short code;
-  fpu_addr_modes addr_modes;
-  int unmasked;
-  FPU_REG loaded_data;
-  FPU_REG *st0_ptr;
-  u_char	  loaded_tag, st0_tag;
-  void __user *data_address;
-  struct address data_sel_off;
-  struct address entry_sel_off;
-  unsigned long code_base = 0;
-  unsigned long code_limit = 0;  /* Initialized to stop compiler warnings */
-  struct desc_struct code_descriptor;
+	u_char FPU_modrm, byte1;
+	unsigned short code;
+	fpu_addr_modes addr_modes;
+	int unmasked;
+	FPU_REG loaded_data;
+	FPU_REG *st0_ptr;
+	u_char loaded_tag, st0_tag;
+	void __user *data_address;
+	struct address data_sel_off;
+	struct address entry_sel_off;
+	unsigned long code_base = 0;
+	unsigned long code_limit = 0;	/* Initialized to stop compiler warnings */
+	struct desc_struct code_descriptor;
 
 #ifdef RE_ENTRANT_CHECKING
-  if ( emulating )
-    {
-      printk("ERROR: wm-FPU-emu is not RE-ENTRANT!\n");
-    }
-  RE_ENTRANT_CHECK_ON;
+	if (emulating) {
+		printk("ERROR: wm-FPU-emu is not RE-ENTRANT!\n");
+	}
+	RE_ENTRANT_CHECK_ON;
 #endif /* RE_ENTRANT_CHECKING */
 
-  if (!used_math())
-    {
-      finit();
-      set_used_math();
-    }
-
-  SETUP_DATA_AREA(arg);
-
-  FPU_ORIG_EIP = FPU_EIP;
-
-  if ( (FPU_EFLAGS & 0x00020000) != 0 )
-    {
-      /* Virtual 8086 mode */
-      addr_modes.default_mode = VM86;
-      FPU_EIP += code_base = FPU_CS << 4;
-      code_limit = code_base + 0xffff;  /* Assumes code_base <= 0xffff0000 */
-    }
-  else if ( FPU_CS == __USER_CS && FPU_DS == __USER_DS )
-    {
-      addr_modes.default_mode = 0;
-    }
-  else if ( FPU_CS == __KERNEL_CS )
-    {
-      printk("math_emulate: %04x:%08lx\n",FPU_CS,FPU_EIP);
-      panic("Math emulation needed in kernel");
-    }
-  else
-    {
-
-      if ( (FPU_CS & 4) != 4 )   /* Must be in the LDT */
-	{
-	  /* Can only handle segmented addressing via the LDT
-	     for now, and it must be 16 bit */
-	  printk("FPU emulator: Unsupported addressing mode\n");
-	  math_abort(FPU_info, SIGILL);
+	if (!used_math()) {
+		finit();
+		set_used_math();
 	}
 
-      code_descriptor = LDT_DESCRIPTOR(FPU_CS);
-      if ( SEG_D_SIZE(code_descriptor) )
-	{
-	  /* The above test may be wrong, the book is not clear */
-	  /* Segmented 32 bit protected mode */
-	  addr_modes.default_mode = SEG32;
+	SETUP_DATA_AREA(arg);
+
+	FPU_ORIG_EIP = FPU_EIP;
+
+	if ((FPU_EFLAGS & 0x00020000) != 0) {
+		/* Virtual 8086 mode */
+		addr_modes.default_mode = VM86;
+		FPU_EIP += code_base = FPU_CS << 4;
+		code_limit = code_base + 0xffff;	/* Assumes code_base <= 0xffff0000 */
+	} else if (FPU_CS == __USER_CS && FPU_DS == __USER_DS) {
+		addr_modes.default_mode = 0;
+	} else if (FPU_CS == __KERNEL_CS) {
+		printk("math_emulate: %04x:%08lx\n", FPU_CS, FPU_EIP);
+		panic("Math emulation needed in kernel");
+	} else {
+
+		if ((FPU_CS & 4) != 4) {	/* Must be in the LDT */
+			/* Can only handle segmented addressing via the LDT
+			   for now, and it must be 16 bit */
+			printk("FPU emulator: Unsupported addressing mode\n");
+			math_abort(FPU_info, SIGILL);
+		}
+
+		code_descriptor = LDT_DESCRIPTOR(FPU_CS);
+		if (SEG_D_SIZE(code_descriptor)) {
+			/* The above test may be wrong, the book is not clear */
+			/* Segmented 32 bit protected mode */
+			addr_modes.default_mode = SEG32;
+		} else {
+			/* 16 bit protected mode */
+			addr_modes.default_mode = PM16;
+		}
+		FPU_EIP += code_base = SEG_BASE_ADDR(code_descriptor);
+		code_limit = code_base
+		    + (SEG_LIMIT(code_descriptor) +
+		       1) * SEG_GRANULARITY(code_descriptor)
+		    - 1;
+		if (code_limit < code_base)
+			code_limit = 0xffffffff;
 	}
-      else
-	{
-	  /* 16 bit protected mode */
-	  addr_modes.default_mode = PM16;
+
+	FPU_lookahead = 1;
+	if (current->ptrace & PT_PTRACED)
+		FPU_lookahead = 0;
+
+	if (!valid_prefix(&byte1, (u_char __user **) & FPU_EIP,
+			  &addr_modes.override)) {
+		RE_ENTRANT_CHECK_OFF;
+		printk
+		    ("FPU emulator: Unknown prefix byte 0x%02x, probably due to\n"
+		     "FPU emulator: self-modifying code! (emulation impossible)\n",
+		     byte1);
+		RE_ENTRANT_CHECK_ON;
+		EXCEPTION(EX_INTERNAL | 0x126);
+		math_abort(FPU_info, SIGILL);
 	}
-      FPU_EIP += code_base = SEG_BASE_ADDR(code_descriptor);
-      code_limit = code_base
-	+ (SEG_LIMIT(code_descriptor)+1) * SEG_GRANULARITY(code_descriptor)
-	  - 1;
-      if ( code_limit < code_base ) code_limit = 0xffffffff;
-    }
-
-  FPU_lookahead = 1;
-  if (current->ptrace & PT_PTRACED)
-    FPU_lookahead = 0;
-
-  if ( !valid_prefix(&byte1, (u_char __user **)&FPU_EIP,
-		     &addr_modes.override) )
-    {
-      RE_ENTRANT_CHECK_OFF;
-      printk("FPU emulator: Unknown prefix byte 0x%02x, probably due to\n"
-	     "FPU emulator: self-modifying code! (emulation impossible)\n",
-	     byte1);
-      RE_ENTRANT_CHECK_ON;
-      EXCEPTION(EX_INTERNAL|0x126);
-      math_abort(FPU_info,SIGILL);
-    }
-
-do_another_FPU_instruction:
-
-  no_ip_update = 0;
-
-  FPU_EIP++;  /* We have fetched the prefix and first code bytes. */
-
-  if ( addr_modes.default_mode )
-    {
-      /* This checks for the minimum instruction bytes.
-	 We also need to check any extra (address mode) code access. */
-      if ( FPU_EIP > code_limit )
-	math_abort(FPU_info,SIGSEGV);
-    }
-
-  if ( (byte1 & 0xf8) != 0xd8 )
-    {
-      if ( byte1 == FWAIT_OPCODE )
-	{
-	  if (partial_status & SW_Summary)
-	    goto do_the_FPU_interrupt;
-	  else
-	    goto FPU_fwait_done;
+
+      do_another_FPU_instruction:
+
+	no_ip_update = 0;
+
+	FPU_EIP++;		/* We have fetched the prefix and first code bytes. */
+
+	if (addr_modes.default_mode) {
+		/* This checks for the minimum instruction bytes.
+		   We also need to check any extra (address mode) code access. */
+		if (FPU_EIP > code_limit)
+			math_abort(FPU_info, SIGSEGV);
 	}
+
+	if ((byte1 & 0xf8) != 0xd8) {
+		if (byte1 == FWAIT_OPCODE) {
+			if (partial_status & SW_Summary)
+				goto do_the_FPU_interrupt;
+			else
+				goto FPU_fwait_done;
+		}
 #ifdef PARANOID
-      EXCEPTION(EX_INTERNAL|0x128);
-      math_abort(FPU_info,SIGILL);
+		EXCEPTION(EX_INTERNAL | 0x128);
+		math_abort(FPU_info, SIGILL);
 #endif /* PARANOID */
-    }
-
-  RE_ENTRANT_CHECK_OFF;
-  FPU_code_access_ok(1);
-  FPU_get_user(FPU_modrm, (u_char __user *) FPU_EIP);
-  RE_ENTRANT_CHECK_ON;
-  FPU_EIP++;
-
-  if (partial_status & SW_Summary)
-    {
-      /* Ignore the error for now if the current instruction is a no-wait
-	 control instruction */
-      /* The 80486 manual contradicts itself on this topic,
-	 but a real 80486 uses the following instructions:
-	 fninit, fnstenv, fnsave, fnstsw, fnstenv, fnclex.
-       */
-      code = (FPU_modrm << 8) | byte1;
-      if ( ! ( (((code & 0xf803) == 0xe003) ||    /* fnclex, fninit, fnstsw */
-		(((code & 0x3003) == 0x3001) &&   /* fnsave, fnstcw, fnstenv,
-						     fnstsw */
-		 ((code & 0xc000) != 0xc000))) ) )
-	{
-	  /*
-	   *  We need to simulate the action of the kernel to FPU
-	   *  interrupts here.
-	   */
-	do_the_FPU_interrupt:
-
-	  FPU_EIP = FPU_ORIG_EIP;	/* Point to current FPU instruction. */
-
-	  RE_ENTRANT_CHECK_OFF;
-	  current->thread.trap_no = 16;
-	  current->thread.error_code = 0;
-	  send_sig(SIGFPE, current, 1);
-	  return;
-	}
-    }
-
-  entry_sel_off.offset = FPU_ORIG_EIP;
-  entry_sel_off.selector = FPU_CS;
-  entry_sel_off.opcode = (byte1 << 8) | FPU_modrm;
-
-  FPU_rm = FPU_modrm & 7;
-
-  if ( FPU_modrm < 0300 )
-    {
-      /* All of these instructions use the mod/rm byte to get a data address */
-
-      if ( (addr_modes.default_mode & SIXTEEN)
-	  ^ (addr_modes.override.address_size == ADDR_SIZE_PREFIX) )
-	data_address = FPU_get_address_16(FPU_modrm, &FPU_EIP, &data_sel_off,
-					  addr_modes);
-      else
-	data_address = FPU_get_address(FPU_modrm, &FPU_EIP, &data_sel_off,
-				       addr_modes);
-
-      if ( addr_modes.default_mode )
-	{
-	  if ( FPU_EIP-1 > code_limit )
-	    math_abort(FPU_info,SIGSEGV);
 	}
 
-      if ( !(byte1 & 1) )
-	{
-	  unsigned short status1 = partial_status;
-
-	  st0_ptr = &st(0);
-	  st0_tag = FPU_gettag0();
-
-	  /* Stack underflow has priority */
-	  if ( NOT_EMPTY_ST0 )
-	    {
-	      if ( addr_modes.default_mode & PROTECTED )
-		{
-		  /* This table works for 16 and 32 bit protected mode */
-		  if ( access_limit < data_sizes_16[(byte1 >> 1) & 3] )
-		    math_abort(FPU_info,SIGSEGV);
+	RE_ENTRANT_CHECK_OFF;
+	FPU_code_access_ok(1);
+	FPU_get_user(FPU_modrm, (u_char __user *) FPU_EIP);
+	RE_ENTRANT_CHECK_ON;
+	FPU_EIP++;
+
+	if (partial_status & SW_Summary) {
+		/* Ignore the error for now if the current instruction is a no-wait
+		   control instruction */
+		/* The 80486 manual contradicts itself on this topic,
+		   but a real 80486 uses the following instructions:
+		   fninit, fnstenv, fnsave, fnstsw, fnstenv, fnclex.
+		 */
+		code = (FPU_modrm << 8) | byte1;
+		if (!((((code & 0xf803) == 0xe003) ||	/* fnclex, fninit, fnstsw */
+		       (((code & 0x3003) == 0x3001) &&	/* fnsave, fnstcw, fnstenv,
+							   fnstsw */
+			((code & 0xc000) != 0xc000))))) {
+			/*
+			 *  We need to simulate the action of the kernel to FPU
+			 *  interrupts here.
+			 */
+		      do_the_FPU_interrupt:
+
+			FPU_EIP = FPU_ORIG_EIP;	/* Point to current FPU instruction. */
+
+			RE_ENTRANT_CHECK_OFF;
+			current->thread.trap_no = 16;
+			current->thread.error_code = 0;
+			send_sig(SIGFPE, current, 1);
+			return;
 		}
+	}
 
-	      unmasked = 0;  /* Do this here to stop compiler warnings. */
-	      switch ( (byte1 >> 1) & 3 )
-		{
-		case 0:
-		  unmasked = FPU_load_single((float __user *)data_address,
-					     &loaded_data);
-		  loaded_tag = unmasked & 0xff;
-		  unmasked &= ~0xff;
-		  break;
-		case 1:
-		  loaded_tag = FPU_load_int32((long __user *)data_address, &loaded_data);
-		  break;
-		case 2:
-		  unmasked = FPU_load_double((double __user *)data_address,
-					     &loaded_data);
-		  loaded_tag = unmasked & 0xff;
-		  unmasked &= ~0xff;
-		  break;
-		case 3:
-		default:  /* Used here to suppress gcc warnings. */
-		  loaded_tag = FPU_load_int16((short __user *)data_address, &loaded_data);
-		  break;
-		}
+	entry_sel_off.offset = FPU_ORIG_EIP;
+	entry_sel_off.selector = FPU_CS;
+	entry_sel_off.opcode = (byte1 << 8) | FPU_modrm;
 
-	      /* No more access to user memory, it is safe
-		 to use static data now */
-
-	      /* NaN operands have the next priority. */
-	      /* We have to delay looking at st(0) until after
-		 loading the data, because that data might contain an SNaN */
-	      if ( ((st0_tag == TAG_Special) && isNaN(st0_ptr)) ||
-		  ((loaded_tag == TAG_Special) && isNaN(&loaded_data)) )
-		{
-		  /* Restore the status word; we might have loaded a
-		     denormal. */
-		  partial_status = status1;
-		  if ( (FPU_modrm & 0x30) == 0x10 )
-		    {
-		      /* fcom or fcomp */
-		      EXCEPTION(EX_Invalid);
-		      setcc(SW_C3 | SW_C2 | SW_C0);
-		      if ( (FPU_modrm & 0x08) && (control_word & CW_Invalid) )
-			FPU_pop();             /* fcomp, masked, so we pop. */
-		    }
-		  else
-		    {
-		      if ( loaded_tag == TAG_Special )
-			loaded_tag = FPU_Special(&loaded_data);
-#ifdef PECULIAR_486
-		      /* This is not really needed, but gives behaviour
-			 identical to an 80486 */
-		      if ( (FPU_modrm & 0x28) == 0x20 )
-			/* fdiv or fsub */
-			real_2op_NaN(&loaded_data, loaded_tag, 0, &loaded_data);
-		      else
-#endif /* PECULIAR_486 */ 
-			/* fadd, fdivr, fmul, or fsubr */
-			real_2op_NaN(&loaded_data, loaded_tag, 0, st0_ptr);
-		    }
-		  goto reg_mem_instr_done;
-		}
+	FPU_rm = FPU_modrm & 7;
 
-	      if ( unmasked && !((FPU_modrm & 0x30) == 0x10) )
-		{
-		  /* Is not a comparison instruction. */
-		  if ( (FPU_modrm & 0x38) == 0x38 )
-		    {
-		      /* fdivr */
-		      if ( (st0_tag == TAG_Zero) &&
-			   ((loaded_tag == TAG_Valid)
-			    || (loaded_tag == TAG_Special
-				&& isdenormal(&loaded_data))) )
-			{
-			  if ( FPU_divide_by_zero(0, getsign(&loaded_data))
-			       < 0 )
-			    {
-			      /* We use the fact here that the unmasked
-				 exception in the loaded data was for a
-				 denormal operand */
-			      /* Restore the state of the denormal op bit */
-			      partial_status &= ~SW_Denorm_Op;
-			      partial_status |= status1 & SW_Denorm_Op;
-			    }
-			  else
-			    setsign(st0_ptr, getsign(&loaded_data));
-			}
-		    }
-		  goto reg_mem_instr_done;
-		}
+	if (FPU_modrm < 0300) {
+		/* All of these instructions use the mod/rm byte to get a data address */
 
-	      switch ( (FPU_modrm >> 3) & 7 )
-		{
-		case 0:         /* fadd */
-		  clear_C1();
-		  FPU_add(&loaded_data, loaded_tag, 0, control_word);
-		  break;
-		case 1:         /* fmul */
-		  clear_C1();
-		  FPU_mul(&loaded_data, loaded_tag, 0, control_word);
-		  break;
-		case 2:         /* fcom */
-		  FPU_compare_st_data(&loaded_data, loaded_tag);
-		  break;
-		case 3:         /* fcomp */
-		  if ( !FPU_compare_st_data(&loaded_data, loaded_tag)
-		       && !unmasked )
-		    FPU_pop();
-		  break;
-		case 4:         /* fsub */
-		  clear_C1();
-		  FPU_sub(LOADED|loaded_tag, (int)&loaded_data, control_word);
-		  break;
-		case 5:         /* fsubr */
-		  clear_C1();
-		  FPU_sub(REV|LOADED|loaded_tag, (int)&loaded_data, control_word);
-		  break;
-		case 6:         /* fdiv */
-		  clear_C1();
-		  FPU_div(LOADED|loaded_tag, (int)&loaded_data, control_word);
-		  break;
-		case 7:         /* fdivr */
-		  clear_C1();
-		  if ( st0_tag == TAG_Zero )
-		    partial_status = status1;  /* Undo any denorm tag,
-						  zero-divide has priority. */
-		  FPU_div(REV|LOADED|loaded_tag, (int)&loaded_data, control_word);
-		  break;
+		if ((addr_modes.default_mode & SIXTEEN)
+		    ^ (addr_modes.override.address_size == ADDR_SIZE_PREFIX))
+			data_address =
+			    FPU_get_address_16(FPU_modrm, &FPU_EIP,
+					       &data_sel_off, addr_modes);
+		else
+			data_address =
+			    FPU_get_address(FPU_modrm, &FPU_EIP, &data_sel_off,
+					    addr_modes);
+
+		if (addr_modes.default_mode) {
+			if (FPU_EIP - 1 > code_limit)
+				math_abort(FPU_info, SIGSEGV);
 		}
-	    }
-	  else
-	    {
-	      if ( (FPU_modrm & 0x30) == 0x10 )
-		{
-		  /* The instruction is fcom or fcomp */
-		  EXCEPTION(EX_StackUnder);
-		  setcc(SW_C3 | SW_C2 | SW_C0);
-		  if ( (FPU_modrm & 0x08) && (control_word & CW_Invalid) )
-		    FPU_pop();             /* fcomp */
+
+		if (!(byte1 & 1)) {
+			unsigned short status1 = partial_status;
+
+			st0_ptr = &st(0);
+			st0_tag = FPU_gettag0();
+
+			/* Stack underflow has priority */
+			if (NOT_EMPTY_ST0) {
+				if (addr_modes.default_mode & PROTECTED) {
+					/* This table works for 16 and 32 bit protected mode */
+					if (access_limit <
+					    data_sizes_16[(byte1 >> 1) & 3])
+						math_abort(FPU_info, SIGSEGV);
+				}
+
+				unmasked = 0;	/* Do this here to stop compiler warnings. */
+				switch ((byte1 >> 1) & 3) {
+				case 0:
+					unmasked =
+					    FPU_load_single((float __user *)
+							    data_address,
+							    &loaded_data);
+					loaded_tag = unmasked & 0xff;
+					unmasked &= ~0xff;
+					break;
+				case 1:
+					loaded_tag =
+					    FPU_load_int32((long __user *)
+							   data_address,
+							   &loaded_data);
+					break;
+				case 2:
+					unmasked =
+					    FPU_load_double((double __user *)
+							    data_address,
+							    &loaded_data);
+					loaded_tag = unmasked & 0xff;
+					unmasked &= ~0xff;
+					break;
+				case 3:
+				default:	/* Used here to suppress gcc warnings. */
+					loaded_tag =
+					    FPU_load_int16((short __user *)
+							   data_address,
+							   &loaded_data);
+					break;
+				}
+
+				/* No more access to user memory, it is safe
+				   to use static data now */
+
+				/* NaN operands have the next priority. */
+				/* We have to delay looking at st(0) until after
+				   loading the data, because that data might contain an SNaN */
+				if (((st0_tag == TAG_Special) && isNaN(st0_ptr))
+				    || ((loaded_tag == TAG_Special)
+					&& isNaN(&loaded_data))) {
+					/* Restore the status word; we might have loaded a
+					   denormal. */
+					partial_status = status1;
+					if ((FPU_modrm & 0x30) == 0x10) {
+						/* fcom or fcomp */
+						EXCEPTION(EX_Invalid);
+						setcc(SW_C3 | SW_C2 | SW_C0);
+						if ((FPU_modrm & 0x08)
+						    && (control_word &
+							CW_Invalid))
+							FPU_pop();	/* fcomp, masked, so we pop. */
+					} else {
+						if (loaded_tag == TAG_Special)
+							loaded_tag =
+							    FPU_Special
+							    (&loaded_data);
+#ifdef PECULIAR_486
+						/* This is not really needed, but gives behaviour
+						   identical to an 80486 */
+						if ((FPU_modrm & 0x28) == 0x20)
+							/* fdiv or fsub */
+							real_2op_NaN
+							    (&loaded_data,
+							     loaded_tag, 0,
+							     &loaded_data);
+						else
+#endif /* PECULIAR_486 */
+							/* fadd, fdivr, fmul, or fsubr */
+							real_2op_NaN
+							    (&loaded_data,
+							     loaded_tag, 0,
+							     st0_ptr);
+					}
+					goto reg_mem_instr_done;
+				}
+
+				if (unmasked && !((FPU_modrm & 0x30) == 0x10)) {
+					/* Is not a comparison instruction. */
+					if ((FPU_modrm & 0x38) == 0x38) {
+						/* fdivr */
+						if ((st0_tag == TAG_Zero) &&
+						    ((loaded_tag == TAG_Valid)
+						     || (loaded_tag ==
+							 TAG_Special
+							 &&
+							 isdenormal
+							 (&loaded_data)))) {
+							if (FPU_divide_by_zero
+							    (0,
+							     getsign
+							     (&loaded_data))
+							    < 0) {
+								/* We use the fact here that the unmasked
+								   exception in the loaded data was for a
+								   denormal operand */
+								/* Restore the state of the denormal op bit */
+								partial_status
+								    &=
+								    ~SW_Denorm_Op;
+								partial_status
+								    |=
+								    status1 &
+								    SW_Denorm_Op;
+							} else
+								setsign(st0_ptr,
+									getsign
+									(&loaded_data));
+						}
+					}
+					goto reg_mem_instr_done;
+				}
+
+				switch ((FPU_modrm >> 3) & 7) {
+				case 0:	/* fadd */
+					clear_C1();
+					FPU_add(&loaded_data, loaded_tag, 0,
+						control_word);
+					break;
+				case 1:	/* fmul */
+					clear_C1();
+					FPU_mul(&loaded_data, loaded_tag, 0,
+						control_word);
+					break;
+				case 2:	/* fcom */
+					FPU_compare_st_data(&loaded_data,
+							    loaded_tag);
+					break;
+				case 3:	/* fcomp */
+					if (!FPU_compare_st_data
+					    (&loaded_data, loaded_tag)
+					    && !unmasked)
+						FPU_pop();
+					break;
+				case 4:	/* fsub */
+					clear_C1();
+					FPU_sub(LOADED | loaded_tag,
+						(int)&loaded_data,
+						control_word);
+					break;
+				case 5:	/* fsubr */
+					clear_C1();
+					FPU_sub(REV | LOADED | loaded_tag,
+						(int)&loaded_data,
+						control_word);
+					break;
+				case 6:	/* fdiv */
+					clear_C1();
+					FPU_div(LOADED | loaded_tag,
+						(int)&loaded_data,
+						control_word);
+					break;
+				case 7:	/* fdivr */
+					clear_C1();
+					if (st0_tag == TAG_Zero)
+						partial_status = status1;	/* Undo any denorm tag,
+										   zero-divide has priority. */
+					FPU_div(REV | LOADED | loaded_tag,
+						(int)&loaded_data,
+						control_word);
+					break;
+				}
+			} else {
+				if ((FPU_modrm & 0x30) == 0x10) {
+					/* The instruction is fcom or fcomp */
+					EXCEPTION(EX_StackUnder);
+					setcc(SW_C3 | SW_C2 | SW_C0);
+					if ((FPU_modrm & 0x08)
+					    && (control_word & CW_Invalid))
+						FPU_pop();	/* fcomp */
+				} else
+					FPU_stack_underflow();
+			}
+		      reg_mem_instr_done:
+			operand_address = data_sel_off;
+		} else {
+			if (!(no_ip_update =
+			      FPU_load_store(((FPU_modrm & 0x38) | (byte1 & 6))
+					     >> 1, addr_modes, data_address))) {
+				operand_address = data_sel_off;
+			}
 		}
-	      else
-		FPU_stack_underflow();
-	    }
-	reg_mem_instr_done:
-	  operand_address = data_sel_off;
-	}
-      else
-	{
-	  if ( !(no_ip_update =
-		 FPU_load_store(((FPU_modrm & 0x38) | (byte1 & 6)) >> 1,
-				addr_modes, data_address)) )
-	    {
-	      operand_address = data_sel_off;
-	    }
-	}
 
-    }
-  else
-    {
-      /* None of these instructions access user memory */
-      u_char instr_index = (FPU_modrm & 0x38) | (byte1 & 7);
+	} else {
+		/* None of these instructions access user memory */
+		u_char instr_index = (FPU_modrm & 0x38) | (byte1 & 7);
 
 #ifdef PECULIAR_486
-      /* This is supposed to be undefined, but a real 80486 seems
-	 to do this: */
-      operand_address.offset = 0;
-      operand_address.selector = FPU_DS;
+		/* This is supposed to be undefined, but a real 80486 seems
+		   to do this: */
+		operand_address.offset = 0;
+		operand_address.selector = FPU_DS;
 #endif /* PECULIAR_486 */
 
-      st0_ptr = &st(0);
-      st0_tag = FPU_gettag0();
-      switch ( type_table[(int) instr_index] )
-	{
-	case _NONE_:   /* also _REGIc: _REGIn */
-	  break;
-	case _REG0_:
-	  if ( !NOT_EMPTY_ST0 )
-	    {
-	      FPU_stack_underflow();
-	      goto FPU_instruction_done;
-	    }
-	  break;
-	case _REGIi:
-	  if ( !NOT_EMPTY_ST0 || !NOT_EMPTY(FPU_rm) )
-	    {
-	      FPU_stack_underflow_i(FPU_rm);
-	      goto FPU_instruction_done;
-	    }
-	  break;
-	case _REGIp:
-	  if ( !NOT_EMPTY_ST0 || !NOT_EMPTY(FPU_rm) )
-	    {
-	      FPU_stack_underflow_pop(FPU_rm);
-	      goto FPU_instruction_done;
-	    }
-	  break;
-	case _REGI_:
-	  if ( !NOT_EMPTY_ST0 || !NOT_EMPTY(FPU_rm) )
-	    {
-	      FPU_stack_underflow();
-	      goto FPU_instruction_done;
-	    }
-	  break;
-	case _PUSH_:     /* Only used by the fld st(i) instruction */
-	  break;
-	case _null_:
-	  FPU_illegal();
-	  goto FPU_instruction_done;
-	default:
-	  EXCEPTION(EX_INTERNAL|0x111);
-	  goto FPU_instruction_done;
-	}
-      (*st_instr_table[(int) instr_index])();
+		st0_ptr = &st(0);
+		st0_tag = FPU_gettag0();
+		switch (type_table[(int)instr_index]) {
+		case _NONE_:	/* also _REGIc: _REGIn */
+			break;
+		case _REG0_:
+			if (!NOT_EMPTY_ST0) {
+				FPU_stack_underflow();
+				goto FPU_instruction_done;
+			}
+			break;
+		case _REGIi:
+			if (!NOT_EMPTY_ST0 || !NOT_EMPTY(FPU_rm)) {
+				FPU_stack_underflow_i(FPU_rm);
+				goto FPU_instruction_done;
+			}
+			break;
+		case _REGIp:
+			if (!NOT_EMPTY_ST0 || !NOT_EMPTY(FPU_rm)) {
+				FPU_stack_underflow_pop(FPU_rm);
+				goto FPU_instruction_done;
+			}
+			break;
+		case _REGI_:
+			if (!NOT_EMPTY_ST0 || !NOT_EMPTY(FPU_rm)) {
+				FPU_stack_underflow();
+				goto FPU_instruction_done;
+			}
+			break;
+		case _PUSH_:	/* Only used by the fld st(i) instruction */
+			break;
+		case _null_:
+			FPU_illegal();
+			goto FPU_instruction_done;
+		default:
+			EXCEPTION(EX_INTERNAL | 0x111);
+			goto FPU_instruction_done;
+		}
+		(*st_instr_table[(int)instr_index]) ();
 
-FPU_instruction_done:
-      ;
-    }
+	      FPU_instruction_done:
+		;
+	}
 
-  if ( ! no_ip_update )
-    instruction_address = entry_sel_off;
+	if (!no_ip_update)
+		instruction_address = entry_sel_off;
 
-FPU_fwait_done:
+      FPU_fwait_done:
 
 #ifdef DEBUG
-  RE_ENTRANT_CHECK_OFF;
-  FPU_printall();
-  RE_ENTRANT_CHECK_ON;
+	RE_ENTRANT_CHECK_OFF;
+	FPU_printall();
+	RE_ENTRANT_CHECK_ON;
 #endif /* DEBUG */
 
-  if (FPU_lookahead && !need_resched())
-    {
-      FPU_ORIG_EIP = FPU_EIP - code_base;
-      if ( valid_prefix(&byte1, (u_char __user **)&FPU_EIP,
-			&addr_modes.override) )
-	goto do_another_FPU_instruction;
-    }
+	if (FPU_lookahead && !need_resched()) {
+		FPU_ORIG_EIP = FPU_EIP - code_base;
+		if (valid_prefix(&byte1, (u_char __user **) & FPU_EIP,
+				 &addr_modes.override))
+			goto do_another_FPU_instruction;
+	}
 
-  if ( addr_modes.default_mode )
-    FPU_EIP -= code_base;
+	if (addr_modes.default_mode)
+		FPU_EIP -= code_base;
 
-  RE_ENTRANT_CHECK_OFF;
+	RE_ENTRANT_CHECK_OFF;
 }
 
-
 /* Support for prefix bytes is not yet complete. To properly handle
    all prefix bytes, further changes are needed in the emulator code
    which accesses user address space. Access to separate segments is
    important for msdos emulation. */
-static int valid_prefix(u_char *Byte, u_char __user **fpu_eip,
-			overrides *override)
+static int valid_prefix(u_char * Byte, u_char __user ** fpu_eip,
+			overrides * override)
 {
-  u_char byte;
-  u_char __user *ip = *fpu_eip;
-
-  *override = (overrides) { 0, 0, PREFIX_DEFAULT };       /* defaults */
-
-  RE_ENTRANT_CHECK_OFF;
-  FPU_code_access_ok(1);
-  FPU_get_user(byte, ip);
-  RE_ENTRANT_CHECK_ON;
-
-  while ( 1 )
-    {
-      switch ( byte )
-	{
-	case ADDR_SIZE_PREFIX:
-	  override->address_size = ADDR_SIZE_PREFIX;
-	  goto do_next_byte;
-
-	case OP_SIZE_PREFIX:
-	  override->operand_size = OP_SIZE_PREFIX;
-	  goto do_next_byte;
-
-	case PREFIX_CS:
-	  override->segment = PREFIX_CS_;
-	  goto do_next_byte;
-	case PREFIX_ES:
-	  override->segment = PREFIX_ES_;
-	  goto do_next_byte;
-	case PREFIX_SS:
-	  override->segment = PREFIX_SS_;
-	  goto do_next_byte;
-	case PREFIX_FS:
-	  override->segment = PREFIX_FS_;
-	  goto do_next_byte;
-	case PREFIX_GS:
-	  override->segment = PREFIX_GS_;
-	  goto do_next_byte;
-	case PREFIX_DS:
-	  override->segment = PREFIX_DS_;
-	  goto do_next_byte;
+	u_char byte;
+	u_char __user *ip = *fpu_eip;
+
+	*override = (overrides) {
+	0, 0, PREFIX_DEFAULT};	/* defaults */
+
+	RE_ENTRANT_CHECK_OFF;
+	FPU_code_access_ok(1);
+	FPU_get_user(byte, ip);
+	RE_ENTRANT_CHECK_ON;
+
+	while (1) {
+		switch (byte) {
+		case ADDR_SIZE_PREFIX:
+			override->address_size = ADDR_SIZE_PREFIX;
+			goto do_next_byte;
+
+		case OP_SIZE_PREFIX:
+			override->operand_size = OP_SIZE_PREFIX;
+			goto do_next_byte;
+
+		case PREFIX_CS:
+			override->segment = PREFIX_CS_;
+			goto do_next_byte;
+		case PREFIX_ES:
+			override->segment = PREFIX_ES_;
+			goto do_next_byte;
+		case PREFIX_SS:
+			override->segment = PREFIX_SS_;
+			goto do_next_byte;
+		case PREFIX_FS:
+			override->segment = PREFIX_FS_;
+			goto do_next_byte;
+		case PREFIX_GS:
+			override->segment = PREFIX_GS_;
+			goto do_next_byte;
+		case PREFIX_DS:
+			override->segment = PREFIX_DS_;
+			goto do_next_byte;
 
 /* lock is not a valid prefix for FPU instructions,
    let the cpu handle it to generate a SIGILL. */
 /*	case PREFIX_LOCK: */
 
-	  /* rep.. prefixes have no meaning for FPU instructions */
-	case PREFIX_REPE:
-	case PREFIX_REPNE:
-
-	do_next_byte:
-	  ip++;
-	  RE_ENTRANT_CHECK_OFF;
-	  FPU_code_access_ok(1);
-	  FPU_get_user(byte, ip);
-	  RE_ENTRANT_CHECK_ON;
-	  break;
-	case FWAIT_OPCODE:
-	  *Byte = byte;
-	  return 1;
-	default:
-	  if ( (byte & 0xf8) == 0xd8 )
-	    {
-	      *Byte = byte;
-	      *fpu_eip = ip;
-	      return 1;
-	    }
-	  else
-	    {
-	      /* Not a valid sequence of prefix bytes followed by
-		 an FPU instruction. */
-	      *Byte = byte;  /* Needed for error message. */
-	      return 0;
-	    }
+			/* rep.. prefixes have no meaning for FPU instructions */
+		case PREFIX_REPE:
+		case PREFIX_REPNE:
+
+		      do_next_byte:
+			ip++;
+			RE_ENTRANT_CHECK_OFF;
+			FPU_code_access_ok(1);
+			FPU_get_user(byte, ip);
+			RE_ENTRANT_CHECK_ON;
+			break;
+		case FWAIT_OPCODE:
+			*Byte = byte;
+			return 1;
+		default:
+			if ((byte & 0xf8) == 0xd8) {
+				*Byte = byte;
+				*fpu_eip = ip;
+				return 1;
+			} else {
+				/* Not a valid sequence of prefix bytes followed by
+				   an FPU instruction. */
+				*Byte = byte;	/* Needed for error message. */
+				return 0;
+			}
+		}
 	}
-    }
 }
 
-
-void math_abort(struct info * info, unsigned int signal)
+void math_abort(struct info *info, unsigned int signal)
 {
 	FPU_EIP = FPU_ORIG_EIP;
 	current->thread.trap_no = 16;
 	current->thread.error_code = 0;
-	send_sig(signal,current,1);
+	send_sig(signal, current, 1);
 	RE_ENTRANT_CHECK_OFF;
-	__asm__("movl %0,%%esp ; ret": :"g" (((long) info)-4));
+      __asm__("movl %0,%%esp ; ret": :"g"(((long)info) - 4));
 #ifdef PARANOID
-      printk("ERROR: wm-FPU-emu math_abort failed!\n");
+	printk("ERROR: wm-FPU-emu math_abort failed!\n");
 #endif /* PARANOID */
 }
 
-
-
 #define S387 ((struct i387_soft_struct *)s387)
 #define sstatus_word() \
   ((S387->swd & ~SW_Top & 0xffff) | ((S387->ftop << SW_Top_Shift) & SW_Top))
 
-int restore_i387_soft(void *s387, struct _fpstate __user *buf)
+int restore_i387_soft(void *s387, struct _fpstate __user * buf)
 {
-  u_char __user *d = (u_char __user *)buf;
-  int offset, other, i, tags, regnr, tag, newtop;
-
-  RE_ENTRANT_CHECK_OFF;
-  FPU_access_ok(VERIFY_READ, d, 7*4 + 8*10);
-  if (__copy_from_user(&S387->cwd, d, 7*4))
-    return -1;
-  RE_ENTRANT_CHECK_ON;
-
-  d += 7*4;
-
-  S387->ftop = (S387->swd >> SW_Top_Shift) & 7;
-  offset = (S387->ftop & 7) * 10;
-  other = 80 - offset;
-
-  RE_ENTRANT_CHECK_OFF;
-  /* Copy all registers in stack order. */
-  if (__copy_from_user(((u_char *)&S387->st_space)+offset, d, other))
-    return -1;
-  if ( offset )
-    if (__copy_from_user((u_char *)&S387->st_space, d+other, offset))
-      return -1;
-  RE_ENTRANT_CHECK_ON;
-
-  /* The tags may need to be corrected now. */
-  tags = S387->twd;
-  newtop = S387->ftop;
-  for ( i = 0; i < 8; i++ )
-    {
-      regnr = (i+newtop) & 7;
-      if ( ((tags >> ((regnr & 7)*2)) & 3) != TAG_Empty )
-	{
-	  /* The loaded data over-rides all other cases. */
-	  tag = FPU_tagof((FPU_REG *)((u_char *)S387->st_space + 10*regnr));
-	  tags &= ~(3 << (regnr*2));
-	  tags |= (tag & 3) << (regnr*2);
+	u_char __user *d = (u_char __user *) buf;
+	int offset, other, i, tags, regnr, tag, newtop;
+
+	RE_ENTRANT_CHECK_OFF;
+	FPU_access_ok(VERIFY_READ, d, 7 * 4 + 8 * 10);
+	if (__copy_from_user(&S387->cwd, d, 7 * 4))
+		return -1;
+	RE_ENTRANT_CHECK_ON;
+
+	d += 7 * 4;
+
+	S387->ftop = (S387->swd >> SW_Top_Shift) & 7;
+	offset = (S387->ftop & 7) * 10;
+	other = 80 - offset;
+
+	RE_ENTRANT_CHECK_OFF;
+	/* Copy all registers in stack order. */
+	if (__copy_from_user(((u_char *) & S387->st_space) + offset, d, other))
+		return -1;
+	if (offset)
+		if (__copy_from_user
+		    ((u_char *) & S387->st_space, d + other, offset))
+			return -1;
+	RE_ENTRANT_CHECK_ON;
+
+	/* The tags may need to be corrected now. */
+	tags = S387->twd;
+	newtop = S387->ftop;
+	for (i = 0; i < 8; i++) {
+		regnr = (i + newtop) & 7;
+		if (((tags >> ((regnr & 7) * 2)) & 3) != TAG_Empty) {
+			/* The loaded data over-rides all other cases. */
+			tag =
+			    FPU_tagof((FPU_REG *) ((u_char *) S387->st_space +
+						   10 * regnr));
+			tags &= ~(3 << (regnr * 2));
+			tags |= (tag & 3) << (regnr * 2);
+		}
 	}
-    }
-  S387->twd = tags;
+	S387->twd = tags;
 
-  return 0;
+	return 0;
 }
 
-
 int save_i387_soft(void *s387, struct _fpstate __user * buf)
 {
-  u_char __user *d = (u_char __user *)buf;
-  int offset = (S387->ftop & 7) * 10, other = 80 - offset;
+	u_char __user *d = (u_char __user *) buf;
+	int offset = (S387->ftop & 7) * 10, other = 80 - offset;
 
-  RE_ENTRANT_CHECK_OFF;
-  FPU_access_ok(VERIFY_WRITE, d, 7*4 + 8*10);
+	RE_ENTRANT_CHECK_OFF;
+	FPU_access_ok(VERIFY_WRITE, d, 7 * 4 + 8 * 10);
 #ifdef PECULIAR_486
-  S387->cwd &= ~0xe080;
-  /* An 80486 sets nearly all of the reserved bits to 1. */
-  S387->cwd |= 0xffff0040;
-  S387->swd = sstatus_word() | 0xffff0000;
-  S387->twd |= 0xffff0000;
-  S387->fcs &= ~0xf8000000;
-  S387->fos |= 0xffff0000;
+	S387->cwd &= ~0xe080;
+	/* An 80486 sets nearly all of the reserved bits to 1. */
+	S387->cwd |= 0xffff0040;
+	S387->swd = sstatus_word() | 0xffff0000;
+	S387->twd |= 0xffff0000;
+	S387->fcs &= ~0xf8000000;
+	S387->fos |= 0xffff0000;
 #endif /* PECULIAR_486 */
-  if (__copy_to_user(d, &S387->cwd, 7*4))
-    return -1;
-  RE_ENTRANT_CHECK_ON;
-
-  d += 7*4;
-
-  RE_ENTRANT_CHECK_OFF;
-  /* Copy all registers in stack order. */
-  if (__copy_to_user(d, ((u_char *)&S387->st_space)+offset, other))
-    return -1;
-  if ( offset )
-    if (__copy_to_user(d+other, (u_char *)&S387->st_space, offset))
-      return -1;
-  RE_ENTRANT_CHECK_ON;
-
-  return 1;
+	if (__copy_to_user(d, &S387->cwd, 7 * 4))
+		return -1;
+	RE_ENTRANT_CHECK_ON;
+
+	d += 7 * 4;
+
+	RE_ENTRANT_CHECK_OFF;
+	/* Copy all registers in stack order. */
+	if (__copy_to_user(d, ((u_char *) & S387->st_space) + offset, other))
+		return -1;
+	if (offset)
+		if (__copy_to_user
+		    (d + other, (u_char *) & S387->st_space, offset))
+			return -1;
+	RE_ENTRANT_CHECK_ON;
+
+	return 1;
 }

arch/x86/math-emu/fpu_etc.c

@@ -16,128 +16,115 @@
 #include "status_w.h"
 #include "reg_constant.h"
 
-
-static void fchs(FPU_REG *st0_ptr, u_char st0tag)
+static void fchs(FPU_REG * st0_ptr, u_char st0tag)
 {
-  if ( st0tag ^ TAG_Empty )
-    {
-      signbyte(st0_ptr) ^= SIGN_NEG;
-      clear_C1();
-    }
-  else
-    FPU_stack_underflow();
+	if (st0tag ^ TAG_Empty) {
+		signbyte(st0_ptr) ^= SIGN_NEG;
+		clear_C1();
+	} else
+		FPU_stack_underflow();
 }
 
-
-static void fabs(FPU_REG *st0_ptr, u_char st0tag)
+static void fabs(FPU_REG * st0_ptr, u_char st0tag)
 {
-  if ( st0tag ^ TAG_Empty )
-    {
-      setpositive(st0_ptr);
-      clear_C1();
-    }
-  else
-    FPU_stack_underflow();
+	if (st0tag ^ TAG_Empty) {
+		setpositive(st0_ptr);
+		clear_C1();
+	} else
+		FPU_stack_underflow();
 }
 
-
-static void ftst_(FPU_REG *st0_ptr, u_char st0tag)
+static void ftst_(FPU_REG * st0_ptr, u_char st0tag)
 {
-  switch (st0tag)
-    {
-    case TAG_Zero:
-      setcc(SW_C3);
-      break;
-    case TAG_Valid:
-      if (getsign(st0_ptr) == SIGN_POS)
-        setcc(0);
-      else
-        setcc(SW_C0);
-      break;
-    case TAG_Special:
-      switch ( FPU_Special(st0_ptr) )
-	{
-	case TW_Denormal:
-	  if (getsign(st0_ptr) == SIGN_POS)
-	    setcc(0);
-	  else
-	    setcc(SW_C0);
-	  if ( denormal_operand() < 0 )
-	    {
-#ifdef PECULIAR_486
-	      /* This is weird! */
-	      if (getsign(st0_ptr) == SIGN_POS)
+	switch (st0tag) {
+	case TAG_Zero:
 		setcc(SW_C3);
+		break;
+	case TAG_Valid:
+		if (getsign(st0_ptr) == SIGN_POS)
+			setcc(0);
+		else
+			setcc(SW_C0);
+		break;
+	case TAG_Special:
+		switch (FPU_Special(st0_ptr)) {
+		case TW_Denormal:
+			if (getsign(st0_ptr) == SIGN_POS)
+				setcc(0);
+			else
+				setcc(SW_C0);
+			if (denormal_operand() < 0) {
+#ifdef PECULIAR_486
+				/* This is weird! */
+				if (getsign(st0_ptr) == SIGN_POS)
+					setcc(SW_C3);
 #endif /* PECULIAR_486 */
-	      return;
-	    }
-	  break;
-	case TW_NaN:
-	  setcc(SW_C0|SW_C2|SW_C3);   /* Operand is not comparable */ 
-	  EXCEPTION(EX_Invalid);
-	  break;
-	case TW_Infinity:
-	  if (getsign(st0_ptr) == SIGN_POS)
-	    setcc(0);
-	  else
-	    setcc(SW_C0);
-	  break;
-	default:
-	  setcc(SW_C0|SW_C2|SW_C3);   /* Operand is not comparable */ 
-	  EXCEPTION(EX_INTERNAL|0x14);
-	  break;
+				return;
+			}
+			break;
+		case TW_NaN:
+			setcc(SW_C0 | SW_C2 | SW_C3);	/* Operand is not comparable */
+			EXCEPTION(EX_Invalid);
+			break;
+		case TW_Infinity:
+			if (getsign(st0_ptr) == SIGN_POS)
+				setcc(0);
+			else
+				setcc(SW_C0);
+			break;
+		default:
+			setcc(SW_C0 | SW_C2 | SW_C3);	/* Operand is not comparable */
+			EXCEPTION(EX_INTERNAL | 0x14);
+			break;
+		}
+		break;
+	case TAG_Empty:
+		setcc(SW_C0 | SW_C2 | SW_C3);
+		EXCEPTION(EX_StackUnder);
+		break;
 	}
-      break;
-    case TAG_Empty:
-      setcc(SW_C0|SW_C2|SW_C3);
-      EXCEPTION(EX_StackUnder);
-      break;
-    }
 }
 
-
-static void fxam(FPU_REG *st0_ptr, u_char st0tag)
+static void fxam(FPU_REG * st0_ptr, u_char st0tag)
 {
-  int c = 0;
-  switch (st0tag)
-    {
-    case TAG_Empty:
-      c = SW_C3|SW_C0;
-      break;
-    case TAG_Zero:
-      c = SW_C3;
-      break;
-    case TAG_Valid:
-      c = SW_C2;
-      break;
-    case TAG_Special:
-      switch ( FPU_Special(st0_ptr) )
-	{
-	case TW_Denormal:
-	  c = SW_C2|SW_C3;  /* Denormal */
-	  break;
-	case TW_NaN:
-	  /* We also use NaN for unsupported types. */
-	  if ( (st0_ptr->sigh & 0x80000000) && (exponent(st0_ptr) == EXP_OVER) )
-	    c = SW_C0;
-	  break;
-	case TW_Infinity:
-	  c = SW_C2|SW_C0;
-	  break;
+	int c = 0;
+	switch (st0tag) {
+	case TAG_Empty:
+		c = SW_C3 | SW_C0;
+		break;
+	case TAG_Zero:
+		c = SW_C3;
+		break;
+	case TAG_Valid:
+		c = SW_C2;
+		break;
+	case TAG_Special:
+		switch (FPU_Special(st0_ptr)) {
+		case TW_Denormal:
+			c = SW_C2 | SW_C3;	/* Denormal */
+			break;
+		case TW_NaN:
+			/* We also use NaN for unsupported types. */
+			if ((st0_ptr->sigh & 0x80000000)
+			    && (exponent(st0_ptr) == EXP_OVER))
+				c = SW_C0;
+			break;
+		case TW_Infinity:
+			c = SW_C2 | SW_C0;
+			break;
+		}
 	}
-    }
-  if ( getsign(st0_ptr) == SIGN_NEG )
-    c |= SW_C1;
-  setcc(c);
+	if (getsign(st0_ptr) == SIGN_NEG)
+		c |= SW_C1;
+	setcc(c);
 }
 
-
 static FUNC_ST0 const fp_etc_table[] = {
-  fchs, fabs, (FUNC_ST0)FPU_illegal, (FUNC_ST0)FPU_illegal,
-  ftst_, fxam, (FUNC_ST0)FPU_illegal, (FUNC_ST0)FPU_illegal
+	fchs, fabs, (FUNC_ST0) FPU_illegal, (FUNC_ST0) FPU_illegal,
+	ftst_, fxam, (FUNC_ST0) FPU_illegal, (FUNC_ST0) FPU_illegal
 };
 
 void FPU_etc(void)
 {
-  (fp_etc_table[FPU_rm])(&st(0), FPU_gettag0());
+	(fp_etc_table[FPU_rm]) (&st(0), FPU_gettag0());
 }

arch/x86/math-emu/fpu_proto.h

@@ -5,7 +5,7 @@
 extern void FPU_illegal(void);
 extern void FPU_printall(void);
 asmlinkage void FPU_exception(int n);
-extern int real_1op_NaN(FPU_REG *a);
+extern int real_1op_NaN(FPU_REG * a);
 extern int real_2op_NaN(FPU_REG const *b, u_char tagb, int deststnr,
 			FPU_REG const *defaultNaN);
 asmlinkage int arith_invalid(int deststnr);
@@ -14,8 +14,8 @@ extern int set_precision_flag(int flags);
 asmlinkage void set_precision_flag_up(void);
 asmlinkage void set_precision_flag_down(void);
 asmlinkage int denormal_operand(void);
-asmlinkage int arith_overflow(FPU_REG *dest);
-asmlinkage int arith_underflow(FPU_REG *dest);
+asmlinkage int arith_overflow(FPU_REG * dest);
+asmlinkage int arith_underflow(FPU_REG * dest);
 extern void FPU_stack_overflow(void);
 extern void FPU_stack_underflow(void);
 extern void FPU_stack_underflow_i(int i);
@@ -66,7 +66,7 @@ extern int FPU_Special(FPU_REG const *ptr);
 extern int isNaN(FPU_REG const *ptr);
 extern void FPU_pop(void);
 extern int FPU_empty_i(int stnr);
-extern int FPU_stackoverflow(FPU_REG **st_new_ptr);
+extern int FPU_stackoverflow(FPU_REG ** st_new_ptr);
 extern void FPU_copy_to_regi(FPU_REG const *r, u_char tag, int stnr);
 extern void FPU_copy_to_reg1(FPU_REG const *r, u_char tag);
 extern void FPU_copy_to_reg0(FPU_REG const *r, u_char tag);
@@ -75,26 +75,28 @@ extern void FPU_triga(void);
 extern void FPU_trigb(void);
 /* get_address.c */
 extern void __user *FPU_get_address(u_char FPU_modrm, unsigned long *fpu_eip,
-			 struct address *addr, fpu_addr_modes addr_modes);
+				    struct address *addr,
+				    fpu_addr_modes addr_modes);
 extern void __user *FPU_get_address_16(u_char FPU_modrm, unsigned long *fpu_eip,
-			    struct address *addr, fpu_addr_modes addr_modes);
+				       struct address *addr,
+				       fpu_addr_modes addr_modes);
 /* load_store.c */
 extern int FPU_load_store(u_char type, fpu_addr_modes addr_modes,
-			    void __user *data_address);
+			  void __user * data_address);
 /* poly_2xm1.c */
-extern int poly_2xm1(u_char sign, FPU_REG *arg, FPU_REG *result);
+extern int poly_2xm1(u_char sign, FPU_REG * arg, FPU_REG * result);
 /* poly_atan.c */
-extern void poly_atan(FPU_REG *st0_ptr, u_char st0_tag, FPU_REG *st1_ptr,
+extern void poly_atan(FPU_REG * st0_ptr, u_char st0_tag, FPU_REG * st1_ptr,
 		      u_char st1_tag);
 /* poly_l2.c */
-extern void poly_l2(FPU_REG *st0_ptr, FPU_REG *st1_ptr, u_char st1_sign);
-extern int poly_l2p1(u_char s0, u_char s1, FPU_REG *r0, FPU_REG *r1,
-		     FPU_REG *d);
+extern void poly_l2(FPU_REG * st0_ptr, FPU_REG * st1_ptr, u_char st1_sign);
+extern int poly_l2p1(u_char s0, u_char s1, FPU_REG * r0, FPU_REG * r1,
+		     FPU_REG * d);
 /* poly_sin.c */
-extern void poly_sine(FPU_REG *st0_ptr);
-extern void poly_cos(FPU_REG *st0_ptr);
+extern void poly_sine(FPU_REG * st0_ptr);
+extern void poly_cos(FPU_REG * st0_ptr);
 /* poly_tan.c */
-extern void poly_tan(FPU_REG *st0_ptr);
+extern void poly_tan(FPU_REG * st0_ptr);
 /* reg_add_sub.c */
 extern int FPU_add(FPU_REG const *b, u_char tagb, int destrnr, int control_w);
 extern int FPU_sub(int flags, int rm, int control_w);
@@ -109,32 +111,34 @@ extern void fucompp(void);
 /* reg_constant.c */
 extern void fconst(void);
 /* reg_ld_str.c */
-extern int FPU_load_extended(long double __user *s, int stnr);
-extern int FPU_load_double(double __user *dfloat, FPU_REG *loaded_data);
-extern int FPU_load_single(float __user *single, FPU_REG *loaded_data);
-extern int FPU_load_int64(long long __user *_s);
-extern int FPU_load_int32(long __user *_s, FPU_REG *loaded_data);
-extern int FPU_load_int16(short __user *_s, FPU_REG *loaded_data);
-extern int FPU_load_bcd(u_char __user *s);
-extern int FPU_store_extended(FPU_REG *st0_ptr, u_char st0_tag,
-			      long double __user *d);
-extern int FPU_store_double(FPU_REG *st0_ptr, u_char st0_tag, double __user *dfloat);
-extern int FPU_store_single(FPU_REG *st0_ptr, u_char st0_tag, float __user *single);
-extern int FPU_store_int64(FPU_REG *st0_ptr, u_char st0_tag, long long __user *d);
-extern int FPU_store_int32(FPU_REG *st0_ptr, u_char st0_tag, long __user *d);
-extern int FPU_store_int16(FPU_REG *st0_ptr, u_char st0_tag, short __user *d);
-extern int FPU_store_bcd(FPU_REG *st0_ptr, u_char st0_tag, u_char __user *d);
-extern int FPU_round_to_int(FPU_REG *r, u_char tag);
-extern u_char __user *fldenv(fpu_addr_modes addr_modes, u_char __user *s);
-extern void frstor(fpu_addr_modes addr_modes, u_char __user *data_address);
-extern u_char __user *fstenv(fpu_addr_modes addr_modes, u_char __user *d);
-extern void fsave(fpu_addr_modes addr_modes, u_char __user *data_address);
-extern int FPU_tagof(FPU_REG *ptr);
+extern int FPU_load_extended(long double __user * s, int stnr);
+extern int FPU_load_double(double __user * dfloat, FPU_REG * loaded_data);
+extern int FPU_load_single(float __user * single, FPU_REG * loaded_data);
+extern int FPU_load_int64(long long __user * _s);
+extern int FPU_load_int32(long __user * _s, FPU_REG * loaded_data);
+extern int FPU_load_int16(short __user * _s, FPU_REG * loaded_data);
+extern int FPU_load_bcd(u_char __user * s);
+extern int FPU_store_extended(FPU_REG * st0_ptr, u_char st0_tag,
+			      long double __user * d);
+extern int FPU_store_double(FPU_REG * st0_ptr, u_char st0_tag,
+			    double __user * dfloat);
+extern int FPU_store_single(FPU_REG * st0_ptr, u_char st0_tag,
+			    float __user * single);
+extern int FPU_store_int64(FPU_REG * st0_ptr, u_char st0_tag,
+			   long long __user * d);
+extern int FPU_store_int32(FPU_REG * st0_ptr, u_char st0_tag, long __user * d);
+extern int FPU_store_int16(FPU_REG * st0_ptr, u_char st0_tag, short __user * d);
+extern int FPU_store_bcd(FPU_REG * st0_ptr, u_char st0_tag, u_char __user * d);
+extern int FPU_round_to_int(FPU_REG * r, u_char tag);
+extern u_char __user *fldenv(fpu_addr_modes addr_modes, u_char __user * s);
+extern void frstor(fpu_addr_modes addr_modes, u_char __user * data_address);
+extern u_char __user *fstenv(fpu_addr_modes addr_modes, u_char __user * d);
+extern void fsave(fpu_addr_modes addr_modes, u_char __user * data_address);
+extern int FPU_tagof(FPU_REG * ptr);
 /* reg_mul.c */
 extern int FPU_mul(FPU_REG const *b, u_char tagb, int deststnr, int control_w);
 
 extern int FPU_div(int flags, int regrm, int control_w);
 /* reg_convert.c */
-extern int FPU_to_exp16(FPU_REG const *a, FPU_REG *x);
+extern int FPU_to_exp16(FPU_REG const *a, FPU_REG * x);
 #endif /* _FPU_PROTO_H */
-

arch/x86/math-emu/fpu_tags.c

@@ -14,114 +14,102 @@
 #include "fpu_system.h"
 #include "exception.h"
 
-
 void FPU_pop(void)
 {
-  fpu_tag_word |= 3 << ((top & 7)*2);
-  top++;
+	fpu_tag_word |= 3 << ((top & 7) * 2);
+	top++;
 }
 
-
 int FPU_gettag0(void)
 {
-  return (fpu_tag_word >> ((top & 7)*2)) & 3;
+	return (fpu_tag_word >> ((top & 7) * 2)) & 3;
 }
 
-
 int FPU_gettagi(int stnr)
 {
-  return (fpu_tag_word >> (((top+stnr) & 7)*2)) & 3;
+	return (fpu_tag_word >> (((top + stnr) & 7) * 2)) & 3;
 }
 
-
 int FPU_gettag(int regnr)
 {
-  return (fpu_tag_word >> ((regnr & 7)*2)) & 3;
+	return (fpu_tag_word >> ((regnr & 7) * 2)) & 3;
 }
 
-
 void FPU_settag0(int tag)
 {
-  int regnr = top;
-  regnr &= 7;
-  fpu_tag_word &= ~(3 << (regnr*2));
-  fpu_tag_word |= (tag & 3) << (regnr*2);
+	int regnr = top;
+	regnr &= 7;
+	fpu_tag_word &= ~(3 << (regnr * 2));
+	fpu_tag_word |= (tag & 3) << (regnr * 2);
 }
 
-
 void FPU_settagi(int stnr, int tag)
 {
-  int regnr = stnr+top;
-  regnr &= 7;
-  fpu_tag_word &= ~(3 << (regnr*2));
-  fpu_tag_word |= (tag & 3) << (regnr*2);
+	int regnr = stnr + top;
+	regnr &= 7;
+	fpu_tag_word &= ~(3 << (regnr * 2));
+	fpu_tag_word |= (tag & 3) << (regnr * 2);
 }
 
-
 void FPU_settag(int regnr, int tag)
 {
-  regnr &= 7;
-  fpu_tag_word &= ~(3 << (regnr*2));
-  fpu_tag_word |= (tag & 3) << (regnr*2);
+	regnr &= 7;
+	fpu_tag_word &= ~(3 << (regnr * 2));
+	fpu_tag_word |= (tag & 3) << (regnr * 2);
 }
 
-
 int FPU_Special(FPU_REG const *ptr)
 {
-  int exp = exponent(ptr);
-
-  if ( exp == EXP_BIAS+EXP_UNDER )
-    return TW_Denormal;
-  else if ( exp != EXP_BIAS+EXP_OVER )
-    return TW_NaN;
-  else if ( (ptr->sigh == 0x80000000) && (ptr->sigl == 0) )
-    return TW_Infinity;
-  return TW_NaN;
+	int exp = exponent(ptr);
+
+	if (exp == EXP_BIAS + EXP_UNDER)
+		return TW_Denormal;
+	else if (exp != EXP_BIAS + EXP_OVER)
+		return TW_NaN;
+	else if ((ptr->sigh == 0x80000000) && (ptr->sigl == 0))
+		return TW_Infinity;
+	return TW_NaN;
 }
 
-
 int isNaN(FPU_REG const *ptr)
 {
-  return ( (exponent(ptr) == EXP_BIAS+EXP_OVER)
-	   && !((ptr->sigh == 0x80000000) && (ptr->sigl == 0)) );
+	return ((exponent(ptr) == EXP_BIAS + EXP_OVER)
+		&& !((ptr->sigh == 0x80000000) && (ptr->sigl == 0)));
 }
 
-
 int FPU_empty_i(int stnr)
 {
-  int regnr = (top+stnr) & 7;
+	int regnr = (top + stnr) & 7;
 
-  return ((fpu_tag_word >> (regnr*2)) & 3) == TAG_Empty;
+	return ((fpu_tag_word >> (regnr * 2)) & 3) == TAG_Empty;
 }
 
-
-int FPU_stackoverflow(FPU_REG **st_new_ptr)
+int FPU_stackoverflow(FPU_REG ** st_new_ptr)
 {
-  *st_new_ptr = &st(-1);
+	*st_new_ptr = &st(-1);
 
-  return ((fpu_tag_word >> (((top - 1) & 7)*2)) & 3) != TAG_Empty;
+	return ((fpu_tag_word >> (((top - 1) & 7) * 2)) & 3) != TAG_Empty;
 }
 
-
 void FPU_copy_to_regi(FPU_REG const *r, u_char tag, int stnr)
 {
-  reg_copy(r, &st(stnr));
-  FPU_settagi(stnr, tag);
+	reg_copy(r, &st(stnr));
+	FPU_settagi(stnr, tag);
 }
 
 void FPU_copy_to_reg1(FPU_REG const *r, u_char tag)
 {
-  reg_copy(r, &st(1));
-  FPU_settagi(1, tag);
+	reg_copy(r, &st(1));
+	FPU_settagi(1, tag);
 }
 
 void FPU_copy_to_reg0(FPU_REG const *r, u_char tag)
 {
-  int regnr = top;
-  regnr &= 7;
+	int regnr = top;
+	regnr &= 7;
 
-  reg_copy(r, &st(0));
+	reg_copy(r, &st(0));
 
-  fpu_tag_word &= ~(3 << (regnr*2));
-  fpu_tag_word |= (tag & 3) << (regnr*2);
+	fpu_tag_word &= ~(3 << (regnr * 2));
+	fpu_tag_word |= (tag & 3) << (regnr * 2);
 }

arch/x86/math-emu/get_address.c

@@ -17,7 +17,6 @@
  |    other processes using the emulator while swapping is in progress.      |
  +---------------------------------------------------------------------------*/
 
-
 #include <linux/stddef.h>
 
 #include <asm/uaccess.h>
@@ -27,31 +26,30 @@
 #include "exception.h"
 #include "fpu_emu.h"
 
-
 #define FPU_WRITE_BIT 0x10
 
 static int reg_offset[] = {
-	offsetof(struct info,___eax),
-	offsetof(struct info,___ecx),
-	offsetof(struct info,___edx),
-	offsetof(struct info,___ebx),
-	offsetof(struct info,___esp),
-	offsetof(struct info,___ebp),
-	offsetof(struct info,___esi),
-	offsetof(struct info,___edi)
+	offsetof(struct info, ___eax),
+	offsetof(struct info, ___ecx),
+	offsetof(struct info, ___edx),
+	offsetof(struct info, ___ebx),
+	offsetof(struct info, ___esp),
+	offsetof(struct info, ___ebp),
+	offsetof(struct info, ___esi),
+	offsetof(struct info, ___edi)
 };
 
 #define REG_(x) (*(long *)(reg_offset[(x)]+(u_char *) FPU_info))
 
 static int reg_offset_vm86[] = {
-	offsetof(struct info,___cs),
-	offsetof(struct info,___vm86_ds),
-	offsetof(struct info,___vm86_es),
-	offsetof(struct info,___vm86_fs),
-	offsetof(struct info,___vm86_gs),
-	offsetof(struct info,___ss),
-	offsetof(struct info,___vm86_ds)
-      };
+	offsetof(struct info, ___cs),
+	offsetof(struct info, ___vm86_ds),
+	offsetof(struct info, ___vm86_es),
+	offsetof(struct info, ___vm86_fs),
+	offsetof(struct info, ___vm86_gs),
+	offsetof(struct info, ___ss),
+	offsetof(struct info, ___vm86_ds)
+};
 
 #define VM86_REG_(x) (*(unsigned short *) \
 		      (reg_offset_vm86[((unsigned)x)]+(u_char *) FPU_info))
@@ -60,158 +58,141 @@ static int reg_offset_vm86[] = {
 #define ___GS ___ds
 
 static int reg_offset_pm[] = {
-	offsetof(struct info,___cs),
-	offsetof(struct info,___ds),
-	offsetof(struct info,___es),
-	offsetof(struct info,___fs),
-	offsetof(struct info,___GS),
-	offsetof(struct info,___ss),
-	offsetof(struct info,___ds)
-      };
+	offsetof(struct info, ___cs),
+	offsetof(struct info, ___ds),
+	offsetof(struct info, ___es),
+	offsetof(struct info, ___fs),
+	offsetof(struct info, ___GS),
+	offsetof(struct info, ___ss),
+	offsetof(struct info, ___ds)
+};
 
 #define PM_REG_(x) (*(unsigned short *) \
 		      (reg_offset_pm[((unsigned)x)]+(u_char *) FPU_info))
 
-
 /* Decode the SIB byte. This function assumes mod != 0 */
 static int sib(int mod, unsigned long *fpu_eip)
 {
-  u_char ss,index,base;
-  long offset;
-
-  RE_ENTRANT_CHECK_OFF;
-  FPU_code_access_ok(1);
-  FPU_get_user(base, (u_char __user *) (*fpu_eip));   /* The SIB byte */
-  RE_ENTRANT_CHECK_ON;
-  (*fpu_eip)++;
-  ss = base >> 6;
-  index = (base >> 3) & 7;
-  base &= 7;
-
-  if ((mod == 0) && (base == 5))
-    offset = 0;              /* No base register */
-  else
-    offset = REG_(base);
-
-  if (index == 4)
-    {
-      /* No index register */
-      /* A non-zero ss is illegal */
-      if ( ss )
-	EXCEPTION(EX_Invalid);
-    }
-  else
-    {
-      offset += (REG_(index)) << ss;
-    }
-
-  if (mod == 1)
-    {
-      /* 8 bit signed displacement */
-      long displacement;
-      RE_ENTRANT_CHECK_OFF;
-      FPU_code_access_ok(1);
-      FPU_get_user(displacement, (signed char __user *) (*fpu_eip));
-      offset += displacement;
-      RE_ENTRANT_CHECK_ON;
-      (*fpu_eip)++;
-    }
-  else if (mod == 2 || base == 5) /* The second condition also has mod==0 */
-    {
-      /* 32 bit displacement */
-      long displacement;
-      RE_ENTRANT_CHECK_OFF;
-      FPU_code_access_ok(4);
-      FPU_get_user(displacement, (long __user *) (*fpu_eip));
-      offset += displacement;
-      RE_ENTRANT_CHECK_ON;
-      (*fpu_eip) += 4;
-    }
-
-  return offset;
-}
+	u_char ss, index, base;
+	long offset;
+
+	RE_ENTRANT_CHECK_OFF;
+	FPU_code_access_ok(1);
+	FPU_get_user(base, (u_char __user *) (*fpu_eip));	/* The SIB byte */
+	RE_ENTRANT_CHECK_ON;
+	(*fpu_eip)++;
+	ss = base >> 6;
+	index = (base >> 3) & 7;
+	base &= 7;
+
+	if ((mod == 0) && (base == 5))
+		offset = 0;	/* No base register */
+	else
+		offset = REG_(base);
+
+	if (index == 4) {
+		/* No index register */
+		/* A non-zero ss is illegal */
+		if (ss)
+			EXCEPTION(EX_Invalid);
+	} else {
+		offset += (REG_(index)) << ss;
+	}
+
+	if (mod == 1) {
+		/* 8 bit signed displacement */
+		long displacement;
+		RE_ENTRANT_CHECK_OFF;
+		FPU_code_access_ok(1);
+		FPU_get_user(displacement, (signed char __user *)(*fpu_eip));
+		offset += displacement;
+		RE_ENTRANT_CHECK_ON;
+		(*fpu_eip)++;
+	} else if (mod == 2 || base == 5) {	/* The second condition also has mod==0 */
+		/* 32 bit displacement */
+		long displacement;
+		RE_ENTRANT_CHECK_OFF;
+		FPU_code_access_ok(4);
+		FPU_get_user(displacement, (long __user *)(*fpu_eip));
+		offset += displacement;
+		RE_ENTRANT_CHECK_ON;
+		(*fpu_eip) += 4;
+	}
 
+	return offset;
+}
 
-static unsigned long vm86_segment(u_char segment,
-				  struct address *addr)
+static unsigned long vm86_segment(u_char segment, struct address *addr)
 {
-  segment--;
+	segment--;
 #ifdef PARANOID
-  if ( segment > PREFIX_SS_ )
-    {
-      EXCEPTION(EX_INTERNAL|0x130);
-      math_abort(FPU_info,SIGSEGV);
-    }
+	if (segment > PREFIX_SS_) {
+		EXCEPTION(EX_INTERNAL | 0x130);
+		math_abort(FPU_info, SIGSEGV);
+	}
 #endif /* PARANOID */
-  addr->selector = VM86_REG_(segment);
-  return (unsigned long)VM86_REG_(segment) << 4;
+	addr->selector = VM86_REG_(segment);
+	return (unsigned long)VM86_REG_(segment) << 4;
 }
 
-
 /* This should work for 16 and 32 bit protected mode. */
 static long pm_address(u_char FPU_modrm, u_char segment,
 		       struct address *addr, long offset)
-{ 
-  struct desc_struct descriptor;
-  unsigned long base_address, limit, address, seg_top;
+{
+	struct desc_struct descriptor;
+	unsigned long base_address, limit, address, seg_top;
 
-  segment--;
+	segment--;
 
 #ifdef PARANOID
-  /* segment is unsigned, so this also detects if segment was 0: */
-  if ( segment > PREFIX_SS_ )
-    {
-      EXCEPTION(EX_INTERNAL|0x132);
-      math_abort(FPU_info,SIGSEGV);
-    }
+	/* segment is unsigned, so this also detects if segment was 0: */
+	if (segment > PREFIX_SS_) {
+		EXCEPTION(EX_INTERNAL | 0x132);
+		math_abort(FPU_info, SIGSEGV);
+	}
 #endif /* PARANOID */
 
-  switch ( segment )
-    {
-      /* gs isn't used by the kernel, so it still has its
-	 user-space value. */
-    case PREFIX_GS_-1:
-      /* N.B. - movl %seg, mem is a 2 byte write regardless of prefix */
-      savesegment(gs, addr->selector);
-      break;
-    default:
-      addr->selector = PM_REG_(segment);
-    }
-
-  descriptor = LDT_DESCRIPTOR(PM_REG_(segment));
-  base_address = SEG_BASE_ADDR(descriptor);
-  address = base_address + offset;
-  limit = base_address
-	+ (SEG_LIMIT(descriptor)+1) * SEG_GRANULARITY(descriptor) - 1;
-  if ( limit < base_address ) limit = 0xffffffff;
-
-  if ( SEG_EXPAND_DOWN(descriptor) )
-    {
-      if ( SEG_G_BIT(descriptor) )
-	seg_top = 0xffffffff;
-      else
-	{
-	  seg_top = base_address + (1 << 20);
-	  if ( seg_top < base_address ) seg_top = 0xffffffff;
+	switch (segment) {
+		/* gs isn't used by the kernel, so it still has its
+		   user-space value. */
+	case PREFIX_GS_ - 1:
+		/* N.B. - movl %seg, mem is a 2 byte write regardless of prefix */
+		savesegment(gs, addr->selector);
+		break;
+	default:
+		addr->selector = PM_REG_(segment);
 	}
-      access_limit =
-	(address <= limit) || (address >= seg_top) ? 0 :
-	  ((seg_top-address) >= 255 ? 255 : seg_top-address);
-    }
-  else
-    {
-      access_limit =
-	(address > limit) || (address < base_address) ? 0 :
-	  ((limit-address) >= 254 ? 255 : limit-address+1);
-    }
-  if ( SEG_EXECUTE_ONLY(descriptor) ||
-      (!SEG_WRITE_PERM(descriptor) && (FPU_modrm & FPU_WRITE_BIT)) )
-    {
-      access_limit = 0;
-    }
-  return address;
-}
 
+	descriptor = LDT_DESCRIPTOR(PM_REG_(segment));
+	base_address = SEG_BASE_ADDR(descriptor);
+	address = base_address + offset;
+	limit = base_address
+	    + (SEG_LIMIT(descriptor) + 1) * SEG_GRANULARITY(descriptor) - 1;
+	if (limit < base_address)
+		limit = 0xffffffff;
+
+	if (SEG_EXPAND_DOWN(descriptor)) {
+		if (SEG_G_BIT(descriptor))
+			seg_top = 0xffffffff;
+		else {
+			seg_top = base_address + (1 << 20);
+			if (seg_top < base_address)
+				seg_top = 0xffffffff;
+		}
+		access_limit =
+		    (address <= limit) || (address >= seg_top) ? 0 :
+		    ((seg_top - address) >= 255 ? 255 : seg_top - address);
+	} else {
+		access_limit =
+		    (address > limit) || (address < base_address) ? 0 :
+		    ((limit - address) >= 254 ? 255 : limit - address + 1);
+	}
+	if (SEG_EXECUTE_ONLY(descriptor) ||
+	    (!SEG_WRITE_PERM(descriptor) && (FPU_modrm & FPU_WRITE_BIT))) {
+		access_limit = 0;
+	}
+	return address;
+}
 
 /*
        MOD R/M byte:  MOD == 3 has a special use for the FPU
@@ -221,7 +202,6 @@ static long pm_address(u_char FPU_modrm, u_char segment,
        .....   .........   .........
         MOD    OPCODE(2)     R/M
 
-
        SIB byte
 
        7   6   5   4   3   2   1   0
@@ -231,208 +211,194 @@ static long pm_address(u_char FPU_modrm, u_char segment,
 */
 
 void __user *FPU_get_address(u_char FPU_modrm, unsigned long *fpu_eip,
-		  struct address *addr,
-		  fpu_addr_modes addr_modes)
+			     struct address *addr, fpu_addr_modes addr_modes)
+{
+	u_char mod;
+	unsigned rm = FPU_modrm & 7;
+	long *cpu_reg_ptr;
+	int address = 0;	/* Initialized just to stop compiler warnings. */
+
+	/* Memory accessed via the cs selector is write protected
+	   in `non-segmented' 32 bit protected mode. */
+	if (!addr_modes.default_mode && (FPU_modrm & FPU_WRITE_BIT)
+	    && (addr_modes.override.segment == PREFIX_CS_)) {
+		math_abort(FPU_info, SIGSEGV);
+	}
+
+	addr->selector = FPU_DS;	/* Default, for 32 bit non-segmented mode. */
+
+	mod = (FPU_modrm >> 6) & 3;
+
+	if (rm == 4 && mod != 3) {
+		address = sib(mod, fpu_eip);
+	} else {
+		cpu_reg_ptr = &REG_(rm);
+		switch (mod) {
+		case 0:
+			if (rm == 5) {
+				/* Special case: disp32 */
+				RE_ENTRANT_CHECK_OFF;
+				FPU_code_access_ok(4);
+				FPU_get_user(address,
+					     (unsigned long __user
+					      *)(*fpu_eip));
+				(*fpu_eip) += 4;
+				RE_ENTRANT_CHECK_ON;
+				addr->offset = address;
+				return (void __user *)address;
+			} else {
+				address = *cpu_reg_ptr;	/* Just return the contents
+							   of the cpu register */
+				addr->offset = address;
+				return (void __user *)address;
+			}
+		case 1:
+			/* 8 bit signed displacement */
+			RE_ENTRANT_CHECK_OFF;
+			FPU_code_access_ok(1);
+			FPU_get_user(address, (signed char __user *)(*fpu_eip));
+			RE_ENTRANT_CHECK_ON;
+			(*fpu_eip)++;
+			break;
+		case 2:
+			/* 32 bit displacement */
+			RE_ENTRANT_CHECK_OFF;
+			FPU_code_access_ok(4);
+			FPU_get_user(address, (long __user *)(*fpu_eip));
+			(*fpu_eip) += 4;
+			RE_ENTRANT_CHECK_ON;
+			break;
+		case 3:
+			/* Not legal for the FPU */
+			EXCEPTION(EX_Invalid);
+		}
+		address += *cpu_reg_ptr;
+	}
+
+	addr->offset = address;
+
+	switch (addr_modes.default_mode) {
+	case 0:
+		break;
+	case VM86:
+		address += vm86_segment(addr_modes.override.segment, addr);
+		break;
+	case PM16:
+	case SEG32:
+		address = pm_address(FPU_modrm, addr_modes.override.segment,
+				     addr, address);
+		break;
+	default:
+		EXCEPTION(EX_INTERNAL | 0x133);
+	}
+
+	return (void __user *)address;
+}
+
+void __user *FPU_get_address_16(u_char FPU_modrm, unsigned long *fpu_eip,
+				struct address *addr, fpu_addr_modes addr_modes)
 {
-  u_char mod;
-  unsigned rm = FPU_modrm & 7;
-  long *cpu_reg_ptr;
-  int address = 0;     /* Initialized just to stop compiler warnings. */
-
-  /* Memory accessed via the cs selector is write protected
-     in `non-segmented' 32 bit protected mode. */
-  if ( !addr_modes.default_mode && (FPU_modrm & FPU_WRITE_BIT)
-      && (addr_modes.override.segment == PREFIX_CS_) )
-    {
-      math_abort(FPU_info,SIGSEGV);
-    }
-
-  addr->selector = FPU_DS;   /* Default, for 32 bit non-segmented mode. */
-
-  mod = (FPU_modrm >> 6) & 3;
-
-  if (rm == 4 && mod != 3)
-    {
-      address = sib(mod, fpu_eip);
-    }
-  else
-    {
-      cpu_reg_ptr = & REG_(rm);
-      switch (mod)
-	{
+	u_char mod;
+	unsigned rm = FPU_modrm & 7;
+	int address = 0;	/* Default used for mod == 0 */
+
+	/* Memory accessed via the cs selector is write protected
+	   in `non-segmented' 32 bit protected mode. */
+	if (!addr_modes.default_mode && (FPU_modrm & FPU_WRITE_BIT)
+	    && (addr_modes.override.segment == PREFIX_CS_)) {
+		math_abort(FPU_info, SIGSEGV);
+	}
+
+	addr->selector = FPU_DS;	/* Default, for 32 bit non-segmented mode. */
+
+	mod = (FPU_modrm >> 6) & 3;
+
+	switch (mod) {
 	case 0:
-	  if (rm == 5)
-	    {
-	      /* Special case: disp32 */
-	      RE_ENTRANT_CHECK_OFF;
-	      FPU_code_access_ok(4);
-	      FPU_get_user(address, (unsigned long __user *) (*fpu_eip));
-	      (*fpu_eip) += 4;
-	      RE_ENTRANT_CHECK_ON;
-	      addr->offset = address;
-	      return (void __user *) address;
-	    }
-	  else
-	    {
-	      address = *cpu_reg_ptr;  /* Just return the contents
-					  of the cpu register */
-	      addr->offset = address;
-	      return (void __user *) address;
-	    }
+		if (rm == 6) {
+			/* Special case: disp16 */
+			RE_ENTRANT_CHECK_OFF;
+			FPU_code_access_ok(2);
+			FPU_get_user(address,
+				     (unsigned short __user *)(*fpu_eip));
+			(*fpu_eip) += 2;
+			RE_ENTRANT_CHECK_ON;
+			goto add_segment;
+		}
+		break;
 	case 1:
-	  /* 8 bit signed displacement */
-	  RE_ENTRANT_CHECK_OFF;
-	  FPU_code_access_ok(1);
-	  FPU_get_user(address, (signed char __user *) (*fpu_eip));
-	  RE_ENTRANT_CHECK_ON;
-	  (*fpu_eip)++;
-	  break;
+		/* 8 bit signed displacement */
+		RE_ENTRANT_CHECK_OFF;
+		FPU_code_access_ok(1);
+		FPU_get_user(address, (signed char __user *)(*fpu_eip));
+		RE_ENTRANT_CHECK_ON;
+		(*fpu_eip)++;
+		break;
 	case 2:
-	  /* 32 bit displacement */
-	  RE_ENTRANT_CHECK_OFF;
-	  FPU_code_access_ok(4);
-	  FPU_get_user(address, (long __user *) (*fpu_eip));
-	  (*fpu_eip) += 4;
-	  RE_ENTRANT_CHECK_ON;
-	  break;
+		/* 16 bit displacement */
+		RE_ENTRANT_CHECK_OFF;
+		FPU_code_access_ok(2);
+		FPU_get_user(address, (unsigned short __user *)(*fpu_eip));
+		(*fpu_eip) += 2;
+		RE_ENTRANT_CHECK_ON;
+		break;
 	case 3:
-	  /* Not legal for the FPU */
-	  EXCEPTION(EX_Invalid);
+		/* Not legal for the FPU */
+		EXCEPTION(EX_Invalid);
+		break;
+	}
+	switch (rm) {
+	case 0:
+		address += FPU_info->___ebx + FPU_info->___esi;
+		break;
+	case 1:
+		address += FPU_info->___ebx + FPU_info->___edi;
+		break;
+	case 2:
+		address += FPU_info->___ebp + FPU_info->___esi;
+		if (addr_modes.override.segment == PREFIX_DEFAULT)
+			addr_modes.override.segment = PREFIX_SS_;
+		break;
+	case 3:
+		address += FPU_info->___ebp + FPU_info->___edi;
+		if (addr_modes.override.segment == PREFIX_DEFAULT)
+			addr_modes.override.segment = PREFIX_SS_;
+		break;
+	case 4:
+		address += FPU_info->___esi;
+		break;
+	case 5:
+		address += FPU_info->___edi;
+		break;
+	case 6:
+		address += FPU_info->___ebp;
+		if (addr_modes.override.segment == PREFIX_DEFAULT)
+			addr_modes.override.segment = PREFIX_SS_;
+		break;
+	case 7:
+		address += FPU_info->___ebx;
+		break;
 	}
-      address += *cpu_reg_ptr;
-    }
-
-  addr->offset = address;
-
-  switch ( addr_modes.default_mode )
-    {
-    case 0:
-      break;
-    case VM86:
-      address += vm86_segment(addr_modes.override.segment, addr);
-      break;
-    case PM16:
-    case SEG32:
-      address = pm_address(FPU_modrm, addr_modes.override.segment,
-			   addr, address);
-      break;
-    default:
-      EXCEPTION(EX_INTERNAL|0x133);
-    }
-
-  return (void __user *)address;
-}
 
+      add_segment:
+	address &= 0xffff;
 
-void __user *FPU_get_address_16(u_char FPU_modrm, unsigned long *fpu_eip,
-		     struct address *addr,
-		     fpu_addr_modes addr_modes)
-{
-  u_char mod;
-  unsigned rm = FPU_modrm & 7;
-  int address = 0;     /* Default used for mod == 0 */
-
-  /* Memory accessed via the cs selector is write protected
-     in `non-segmented' 32 bit protected mode. */
-  if ( !addr_modes.default_mode && (FPU_modrm & FPU_WRITE_BIT)
-      && (addr_modes.override.segment == PREFIX_CS_) )
-    {
-      math_abort(FPU_info,SIGSEGV);
-    }
-
-  addr->selector = FPU_DS;   /* Default, for 32 bit non-segmented mode. */
-
-  mod = (FPU_modrm >> 6) & 3;
-
-  switch (mod)
-    {
-    case 0:
-      if (rm == 6)
-	{
-	  /* Special case: disp16 */
-	  RE_ENTRANT_CHECK_OFF;
-	  FPU_code_access_ok(2);
-	  FPU_get_user(address, (unsigned short __user *) (*fpu_eip));
-	  (*fpu_eip) += 2;
-	  RE_ENTRANT_CHECK_ON;
-	  goto add_segment;
+	addr->offset = address;
+
+	switch (addr_modes.default_mode) {
+	case 0:
+		break;
+	case VM86:
+		address += vm86_segment(addr_modes.override.segment, addr);
+		break;
+	case PM16:
+	case SEG32:
+		address = pm_address(FPU_modrm, addr_modes.override.segment,
+				     addr, address);
+		break;
+	default:
+		EXCEPTION(EX_INTERNAL | 0x131);
 	}
-      break;
-    case 1:
-      /* 8 bit signed displacement */
-      RE_ENTRANT_CHECK_OFF;
-      FPU_code_access_ok(1);
-      FPU_get_user(address, (signed char __user *) (*fpu_eip));
-      RE_ENTRANT_CHECK_ON;
-      (*fpu_eip)++;
-      break;
-    case 2:
-      /* 16 bit displacement */
-      RE_ENTRANT_CHECK_OFF;
-      FPU_code_access_ok(2);
-      FPU_get_user(address, (unsigned short __user *) (*fpu_eip));
-      (*fpu_eip) += 2;
-      RE_ENTRANT_CHECK_ON;
-      break;
-    case 3:
-      /* Not legal for the FPU */
-      EXCEPTION(EX_Invalid);
-      break;
-    }
-  switch ( rm )
-    {
-    case 0:
-      address += FPU_info->___ebx + FPU_info->___esi;
-      break;
-    case 1:
-      address += FPU_info->___ebx + FPU_info->___edi;
-      break;
-    case 2:
-      address += FPU_info->___ebp + FPU_info->___esi;
-      if ( addr_modes.override.segment == PREFIX_DEFAULT )
-	addr_modes.override.segment = PREFIX_SS_;
-      break;
-    case 3:
-      address += FPU_info->___ebp + FPU_info->___edi;
-      if ( addr_modes.override.segment == PREFIX_DEFAULT )
-	addr_modes.override.segment = PREFIX_SS_;
-      break;
-    case 4:
-      address += FPU_info->___esi;
-      break;
-    case 5:
-      address += FPU_info->___edi;
-      break;
-    case 6:
-      address += FPU_info->___ebp;
-      if ( addr_modes.override.segment == PREFIX_DEFAULT )
-	addr_modes.override.segment = PREFIX_SS_;
-      break;
-    case 7:
-      address += FPU_info->___ebx;
-      break;
-    }
-
- add_segment:
-  address &= 0xffff;
-
-  addr->offset = address;
-
-  switch ( addr_modes.default_mode )
-    {
-    case 0:
-      break;
-    case VM86:
-      address += vm86_segment(addr_modes.override.segment, addr);
-      break;
-    case PM16:
-    case SEG32:
-      address = pm_address(FPU_modrm, addr_modes.override.segment,
-			   addr, address);
-      break;
-    default:
-      EXCEPTION(EX_INTERNAL|0x131);
-    }
-
-  return (void __user *)address ;
+
+	return (void __user *)address;
 }

arch/x86/math-emu/load_store.c

@@ -26,247 +26,257 @@
 #include "status_w.h"
 #include "control_w.h"
 
-
-#define _NONE_ 0   /* st0_ptr etc not needed */
-#define _REG0_ 1   /* Will be storing st(0) */
-#define _PUSH_ 3   /* Need to check for space to push onto stack */
-#define _null_ 4   /* Function illegal or not implemented */
+#define _NONE_ 0		/* st0_ptr etc not needed */
+#define _REG0_ 1		/* Will be storing st(0) */
+#define _PUSH_ 3		/* Need to check for space to push onto stack */
+#define _null_ 4		/* Function illegal or not implemented */
 
 #define pop_0()	{ FPU_settag0(TAG_Empty); top++; }
 
-
 static u_char const type_table[32] = {
-  _PUSH_, _PUSH_, _PUSH_, _PUSH_,
-  _null_, _null_, _null_, _null_,
-  _REG0_, _REG0_, _REG0_, _REG0_,
-  _REG0_, _REG0_, _REG0_, _REG0_,
-  _NONE_, _null_, _NONE_, _PUSH_,
-  _NONE_, _PUSH_, _null_, _PUSH_,
-  _NONE_, _null_, _NONE_, _REG0_,
-  _NONE_, _REG0_, _NONE_, _REG0_
-  };
+	_PUSH_, _PUSH_, _PUSH_, _PUSH_,
+	_null_, _null_, _null_, _null_,
+	_REG0_, _REG0_, _REG0_, _REG0_,
+	_REG0_, _REG0_, _REG0_, _REG0_,
+	_NONE_, _null_, _NONE_, _PUSH_,
+	_NONE_, _PUSH_, _null_, _PUSH_,
+	_NONE_, _null_, _NONE_, _REG0_,
+	_NONE_, _REG0_, _NONE_, _REG0_
+};
 
 u_char const data_sizes_16[32] = {
-  4,  4,  8,  2,  0,  0,  0,  0,
-  4,  4,  8,  2,  4,  4,  8,  2,
-  14, 0, 94, 10,  2, 10,  0,  8,  
-  14, 0, 94, 10,  2, 10,  2,  8
+	4, 4, 8, 2, 0, 0, 0, 0,
+	4, 4, 8, 2, 4, 4, 8, 2,
+	14, 0, 94, 10, 2, 10, 0, 8,
+	14, 0, 94, 10, 2, 10, 2, 8
 };
 
 static u_char const data_sizes_32[32] = {
-  4,  4,  8,  2,  0,  0,  0,  0,
-  4,  4,  8,  2,  4,  4,  8,  2,
-  28, 0,108, 10,  2, 10,  0,  8,  
-  28, 0,108, 10,  2, 10,  2,  8
+	4, 4, 8, 2, 0, 0, 0, 0,
+	4, 4, 8, 2, 4, 4, 8, 2,
+	28, 0, 108, 10, 2, 10, 0, 8,
+	28, 0, 108, 10, 2, 10, 2, 8
 };
 
 int FPU_load_store(u_char type, fpu_addr_modes addr_modes,
-		     void __user *data_address)
+		   void __user * data_address)
 {
-  FPU_REG loaded_data;
-  FPU_REG *st0_ptr;
-  u_char st0_tag = TAG_Empty;  /* This is just to stop a gcc warning. */
-  u_char loaded_tag;
+	FPU_REG loaded_data;
+	FPU_REG *st0_ptr;
+	u_char st0_tag = TAG_Empty;	/* This is just to stop a gcc warning. */
+	u_char loaded_tag;
 
-  st0_ptr = NULL;    /* Initialized just to stop compiler warnings. */
+	st0_ptr = NULL;		/* Initialized just to stop compiler warnings. */
 
-  if ( addr_modes.default_mode & PROTECTED )
-    {
-      if ( addr_modes.default_mode == SEG32 )
-	{
-	  if ( access_limit < data_sizes_32[type] )
-	    math_abort(FPU_info,SIGSEGV);
-	}
-      else if ( addr_modes.default_mode == PM16 )
-	{
-	  if ( access_limit < data_sizes_16[type] )
-	    math_abort(FPU_info,SIGSEGV);
-	}
+	if (addr_modes.default_mode & PROTECTED) {
+		if (addr_modes.default_mode == SEG32) {
+			if (access_limit < data_sizes_32[type])
+				math_abort(FPU_info, SIGSEGV);
+		} else if (addr_modes.default_mode == PM16) {
+			if (access_limit < data_sizes_16[type])
+				math_abort(FPU_info, SIGSEGV);
+		}
 #ifdef PARANOID
-      else
-	EXCEPTION(EX_INTERNAL|0x140);
+		else
+			EXCEPTION(EX_INTERNAL | 0x140);
 #endif /* PARANOID */
-    }
+	}
 
-  switch ( type_table[type] )
-    {
-    case _NONE_:
-      break;
-    case _REG0_:
-      st0_ptr = &st(0);       /* Some of these instructions pop after
-				 storing */
-      st0_tag = FPU_gettag0();
-      break;
-    case _PUSH_:
-      {
-	if ( FPU_gettagi(-1) != TAG_Empty )
-	  { FPU_stack_overflow(); return 0; }
-	top--;
-	st0_ptr = &st(0);
-      }
-      break;
-    case _null_:
-      FPU_illegal();
-      return 0;
+	switch (type_table[type]) {
+	case _NONE_:
+		break;
+	case _REG0_:
+		st0_ptr = &st(0);	/* Some of these instructions pop after
+					   storing */
+		st0_tag = FPU_gettag0();
+		break;
+	case _PUSH_:
+		{
+			if (FPU_gettagi(-1) != TAG_Empty) {
+				FPU_stack_overflow();
+				return 0;
+			}
+			top--;
+			st0_ptr = &st(0);
+		}
+		break;
+	case _null_:
+		FPU_illegal();
+		return 0;
 #ifdef PARANOID
-    default:
-      EXCEPTION(EX_INTERNAL|0x141);
-      return 0;
+	default:
+		EXCEPTION(EX_INTERNAL | 0x141);
+		return 0;
 #endif /* PARANOID */
-    }
-
-  switch ( type )
-    {
-    case 000:       /* fld m32real */
-      clear_C1();
-      loaded_tag = FPU_load_single((float __user *)data_address, &loaded_data);
-      if ( (loaded_tag == TAG_Special)
-	   && isNaN(&loaded_data)
-	   && (real_1op_NaN(&loaded_data) < 0) )
-	{
-	  top++;
-	  break;
-	}
-      FPU_copy_to_reg0(&loaded_data, loaded_tag);
-      break;
-    case 001:      /* fild m32int */
-      clear_C1();
-      loaded_tag = FPU_load_int32((long __user *)data_address, &loaded_data);
-      FPU_copy_to_reg0(&loaded_data, loaded_tag);
-      break;
-    case 002:      /* fld m64real */
-      clear_C1();
-      loaded_tag = FPU_load_double((double __user *)data_address, &loaded_data);
-      if ( (loaded_tag == TAG_Special)
-	   && isNaN(&loaded_data)
-	   && (real_1op_NaN(&loaded_data) < 0) )
-	{
-	  top++;
-	  break;
 	}
-      FPU_copy_to_reg0(&loaded_data, loaded_tag);
-      break;
-    case 003:      /* fild m16int */
-      clear_C1();
-      loaded_tag = FPU_load_int16((short __user *)data_address, &loaded_data);
-      FPU_copy_to_reg0(&loaded_data, loaded_tag);
-      break;
-    case 010:      /* fst m32real */
-      clear_C1();
-      FPU_store_single(st0_ptr, st0_tag, (float __user *)data_address);
-      break;
-    case 011:      /* fist m32int */
-      clear_C1();
-      FPU_store_int32(st0_ptr, st0_tag, (long __user *)data_address);
-      break;
-    case 012:     /* fst m64real */
-      clear_C1();
-      FPU_store_double(st0_ptr, st0_tag, (double __user *)data_address);
-      break;
-    case 013:     /* fist m16int */
-      clear_C1();
-      FPU_store_int16(st0_ptr, st0_tag, (short __user *)data_address);
-      break;
-    case 014:     /* fstp m32real */
-      clear_C1();
-      if ( FPU_store_single(st0_ptr, st0_tag, (float __user *)data_address) )
-	pop_0();  /* pop only if the number was actually stored
-		     (see the 80486 manual p16-28) */
-      break;
-    case 015:     /* fistp m32int */
-      clear_C1();
-      if ( FPU_store_int32(st0_ptr, st0_tag, (long __user *)data_address) )
-	pop_0();  /* pop only if the number was actually stored
-		     (see the 80486 manual p16-28) */
-      break;
-    case 016:     /* fstp m64real */
-      clear_C1();
-      if ( FPU_store_double(st0_ptr, st0_tag, (double __user *)data_address) )
-	pop_0();  /* pop only if the number was actually stored
-		     (see the 80486 manual p16-28) */
-      break;
-    case 017:     /* fistp m16int */
-      clear_C1();
-      if ( FPU_store_int16(st0_ptr, st0_tag, (short __user *)data_address) )
-	pop_0();  /* pop only if the number was actually stored
-		     (see the 80486 manual p16-28) */
-      break;
-    case 020:     /* fldenv  m14/28byte */
-      fldenv(addr_modes, (u_char __user *)data_address);
-      /* Ensure that the values just loaded are not changed by
-	 fix-up operations. */
-      return 1;
-    case 022:     /* frstor m94/108byte */
-      frstor(addr_modes, (u_char __user *)data_address);
-      /* Ensure that the values just loaded are not changed by
-	 fix-up operations. */
-      return 1;
-    case 023:     /* fbld m80dec */
-      clear_C1();
-      loaded_tag = FPU_load_bcd((u_char __user *)data_address);
-      FPU_settag0(loaded_tag);
-      break;
-    case 024:     /* fldcw */
-      RE_ENTRANT_CHECK_OFF;
-      FPU_access_ok(VERIFY_READ, data_address, 2);
-      FPU_get_user(control_word, (unsigned short __user *) data_address);
-      RE_ENTRANT_CHECK_ON;
-      if ( partial_status & ~control_word & CW_Exceptions )
-	partial_status |= (SW_Summary | SW_Backward);
-      else
-	partial_status &= ~(SW_Summary | SW_Backward);
+
+	switch (type) {
+	case 000:		/* fld m32real */
+		clear_C1();
+		loaded_tag =
+		    FPU_load_single((float __user *)data_address, &loaded_data);
+		if ((loaded_tag == TAG_Special)
+		    && isNaN(&loaded_data)
+		    && (real_1op_NaN(&loaded_data) < 0)) {
+			top++;
+			break;
+		}
+		FPU_copy_to_reg0(&loaded_data, loaded_tag);
+		break;
+	case 001:		/* fild m32int */
+		clear_C1();
+		loaded_tag =
+		    FPU_load_int32((long __user *)data_address, &loaded_data);
+		FPU_copy_to_reg0(&loaded_data, loaded_tag);
+		break;
+	case 002:		/* fld m64real */
+		clear_C1();
+		loaded_tag =
+		    FPU_load_double((double __user *)data_address,
+				    &loaded_data);
+		if ((loaded_tag == TAG_Special)
+		    && isNaN(&loaded_data)
+		    && (real_1op_NaN(&loaded_data) < 0)) {
+			top++;
+			break;
+		}
+		FPU_copy_to_reg0(&loaded_data, loaded_tag);
+		break;
+	case 003:		/* fild m16int */
+		clear_C1();
+		loaded_tag =
+		    FPU_load_int16((short __user *)data_address, &loaded_data);
+		FPU_copy_to_reg0(&loaded_data, loaded_tag);
+		break;
+	case 010:		/* fst m32real */
+		clear_C1();
+		FPU_store_single(st0_ptr, st0_tag,
+				 (float __user *)data_address);
+		break;
+	case 011:		/* fist m32int */
+		clear_C1();
+		FPU_store_int32(st0_ptr, st0_tag, (long __user *)data_address);
+		break;
+	case 012:		/* fst m64real */
+		clear_C1();
+		FPU_store_double(st0_ptr, st0_tag,
+				 (double __user *)data_address);
+		break;
+	case 013:		/* fist m16int */
+		clear_C1();
+		FPU_store_int16(st0_ptr, st0_tag, (short __user *)data_address);
+		break;
+	case 014:		/* fstp m32real */
+		clear_C1();
+		if (FPU_store_single
+		    (st0_ptr, st0_tag, (float __user *)data_address))
+			pop_0();	/* pop only if the number was actually stored
+					   (see the 80486 manual p16-28) */
+		break;
+	case 015:		/* fistp m32int */
+		clear_C1();
+		if (FPU_store_int32
+		    (st0_ptr, st0_tag, (long __user *)data_address))
+			pop_0();	/* pop only if the number was actually stored
+					   (see the 80486 manual p16-28) */
+		break;
+	case 016:		/* fstp m64real */
+		clear_C1();
+		if (FPU_store_double
+		    (st0_ptr, st0_tag, (double __user *)data_address))
+			pop_0();	/* pop only if the number was actually stored
+					   (see the 80486 manual p16-28) */
+		break;
+	case 017:		/* fistp m16int */
+		clear_C1();
+		if (FPU_store_int16
+		    (st0_ptr, st0_tag, (short __user *)data_address))
+			pop_0();	/* pop only if the number was actually stored
+					   (see the 80486 manual p16-28) */
+		break;
+	case 020:		/* fldenv  m14/28byte */
+		fldenv(addr_modes, (u_char __user *) data_address);
+		/* Ensure that the values just loaded are not changed by
+		   fix-up operations. */
+		return 1;
+	case 022:		/* frstor m94/108byte */
+		frstor(addr_modes, (u_char __user *) data_address);
+		/* Ensure that the values just loaded are not changed by
+		   fix-up operations. */
+		return 1;
+	case 023:		/* fbld m80dec */
+		clear_C1();
+		loaded_tag = FPU_load_bcd((u_char __user *) data_address);
+		FPU_settag0(loaded_tag);
+		break;
+	case 024:		/* fldcw */
+		RE_ENTRANT_CHECK_OFF;
+		FPU_access_ok(VERIFY_READ, data_address, 2);
+		FPU_get_user(control_word,
+			     (unsigned short __user *)data_address);
+		RE_ENTRANT_CHECK_ON;
+		if (partial_status & ~control_word & CW_Exceptions)
+			partial_status |= (SW_Summary | SW_Backward);
+		else
+			partial_status &= ~(SW_Summary | SW_Backward);
 #ifdef PECULIAR_486
-      control_word |= 0x40;  /* An 80486 appears to always set this bit */
+		control_word |= 0x40;	/* An 80486 appears to always set this bit */
 #endif /* PECULIAR_486 */
-      return 1;
-    case 025:      /* fld m80real */
-      clear_C1();
-      loaded_tag = FPU_load_extended((long double __user *)data_address, 0);
-      FPU_settag0(loaded_tag);
-      break;
-    case 027:      /* fild m64int */
-      clear_C1();
-      loaded_tag = FPU_load_int64((long long __user *)data_address);
-      if (loaded_tag == TAG_Error)
+		return 1;
+	case 025:		/* fld m80real */
+		clear_C1();
+		loaded_tag =
+		    FPU_load_extended((long double __user *)data_address, 0);
+		FPU_settag0(loaded_tag);
+		break;
+	case 027:		/* fild m64int */
+		clear_C1();
+		loaded_tag = FPU_load_int64((long long __user *)data_address);
+		if (loaded_tag == TAG_Error)
+			return 0;
+		FPU_settag0(loaded_tag);
+		break;
+	case 030:		/* fstenv  m14/28byte */
+		fstenv(addr_modes, (u_char __user *) data_address);
+		return 1;
+	case 032:		/* fsave */
+		fsave(addr_modes, (u_char __user *) data_address);
+		return 1;
+	case 033:		/* fbstp m80dec */
+		clear_C1();
+		if (FPU_store_bcd
+		    (st0_ptr, st0_tag, (u_char __user *) data_address))
+			pop_0();	/* pop only if the number was actually stored
+					   (see the 80486 manual p16-28) */
+		break;
+	case 034:		/* fstcw m16int */
+		RE_ENTRANT_CHECK_OFF;
+		FPU_access_ok(VERIFY_WRITE, data_address, 2);
+		FPU_put_user(control_word,
+			     (unsigned short __user *)data_address);
+		RE_ENTRANT_CHECK_ON;
+		return 1;
+	case 035:		/* fstp m80real */
+		clear_C1();
+		if (FPU_store_extended
+		    (st0_ptr, st0_tag, (long double __user *)data_address))
+			pop_0();	/* pop only if the number was actually stored
+					   (see the 80486 manual p16-28) */
+		break;
+	case 036:		/* fstsw m2byte */
+		RE_ENTRANT_CHECK_OFF;
+		FPU_access_ok(VERIFY_WRITE, data_address, 2);
+		FPU_put_user(status_word(),
+			     (unsigned short __user *)data_address);
+		RE_ENTRANT_CHECK_ON;
+		return 1;
+	case 037:		/* fistp m64int */
+		clear_C1();
+		if (FPU_store_int64
+		    (st0_ptr, st0_tag, (long long __user *)data_address))
+			pop_0();	/* pop only if the number was actually stored
+					   (see the 80486 manual p16-28) */
+		break;
+	}
 	return 0;
-      FPU_settag0(loaded_tag);
-      break;
-    case 030:     /* fstenv  m14/28byte */
-      fstenv(addr_modes, (u_char __user *)data_address);
-      return 1;
-    case 032:      /* fsave */
-      fsave(addr_modes, (u_char __user *)data_address);
-      return 1;
-    case 033:      /* fbstp m80dec */
-      clear_C1();
-      if ( FPU_store_bcd(st0_ptr, st0_tag, (u_char __user *)data_address) )
-	pop_0();  /* pop only if the number was actually stored
-		     (see the 80486 manual p16-28) */
-      break;
-    case 034:      /* fstcw m16int */
-      RE_ENTRANT_CHECK_OFF;
-      FPU_access_ok(VERIFY_WRITE,data_address,2);
-      FPU_put_user(control_word, (unsigned short __user *) data_address);
-      RE_ENTRANT_CHECK_ON;
-      return 1;
-    case 035:      /* fstp m80real */
-      clear_C1();
-      if ( FPU_store_extended(st0_ptr, st0_tag, (long double __user *)data_address) )
-	pop_0();  /* pop only if the number was actually stored
-		     (see the 80486 manual p16-28) */
-      break;
-    case 036:      /* fstsw m2byte */
-      RE_ENTRANT_CHECK_OFF;
-      FPU_access_ok(VERIFY_WRITE,data_address,2);
-      FPU_put_user(status_word(),(unsigned short __user *) data_address);
-      RE_ENTRANT_CHECK_ON;
-      return 1;
-    case 037:      /* fistp m64int */
-      clear_C1();
-      if ( FPU_store_int64(st0_ptr, st0_tag, (long long __user *)data_address) )
-	pop_0();  /* pop only if the number was actually stored
-		     (see the 80486 manual p16-28) */
-      break;
-    }
-  return 0;
 }

arch/x86/math-emu/poly.h

@@ -21,9 +21,9 @@
    allows. 9-byte would probably be sufficient.
    */
 typedef struct {
-  unsigned long lsw;
-  unsigned long midw;
-  unsigned long msw;
+	unsigned long lsw;
+	unsigned long midw;
+	unsigned long msw;
 } Xsig;
 
 asmlinkage void mul64(unsigned long long const *a, unsigned long long const *b,
@@ -33,12 +33,12 @@ asmlinkage void polynomial_Xsig(Xsig *, const unsigned long long *x,
 
 asmlinkage void mul32_Xsig(Xsig *, const unsigned long mult);
 asmlinkage void mul64_Xsig(Xsig *, const unsigned long long *mult);
-asmlinkage void mul_Xsig_Xsig(Xsig *dest, const Xsig *mult);
+asmlinkage void mul_Xsig_Xsig(Xsig * dest, const Xsig * mult);
 
 asmlinkage void shr_Xsig(Xsig *, const int n);
 asmlinkage int round_Xsig(Xsig *);
 asmlinkage int norm_Xsig(Xsig *);
-asmlinkage void div_Xsig(Xsig *x1, const Xsig *x2, const Xsig *dest);
+asmlinkage void div_Xsig(Xsig * x1, const Xsig * x2, const Xsig * dest);
 
 /* Macro to extract the most significant 32 bits from a long long */
 #define LL_MSW(x)     (((unsigned long *)&x)[1])
@@ -49,7 +49,6 @@ asmlinkage void div_Xsig(Xsig *x1, const Xsig *x2, const Xsig *dest);
 /* Macro to access the 8 ms bytes of an Xsig as a long long */
 #define XSIG_LL(x)         (*(unsigned long long *)&x.midw)
 
-
 /*
    Need to run gcc with optimizations on to get these to
    actually be in-line.
@@ -63,59 +62,53 @@ asmlinkage void div_Xsig(Xsig *x1, const Xsig *x2, const Xsig *dest);
 static inline unsigned long mul_32_32(const unsigned long arg1,
 				      const unsigned long arg2)
 {
-  int retval;
-  asm volatile ("mull %2; movl %%edx,%%eax" \
-		:"=a" (retval) \
-		:"0" (arg1), "g" (arg2) \
-		:"dx");
-  return retval;
+	int retval;
+	asm volatile ("mull %2; movl %%edx,%%eax":"=a" (retval)
+		      :"0"(arg1), "g"(arg2)
+		      :"dx");
+	return retval;
 }
 
-
 /* Add the 12 byte Xsig x2 to Xsig dest, with no checks for overflow. */
-static inline void add_Xsig_Xsig(Xsig *dest, const Xsig *x2)
+static inline void add_Xsig_Xsig(Xsig * dest, const Xsig * x2)
 {
-  asm volatile ("movl %1,%%edi; movl %2,%%esi;\n"
-                "movl (%%esi),%%eax; addl %%eax,(%%edi);\n"
-                "movl 4(%%esi),%%eax; adcl %%eax,4(%%edi);\n"
-                "movl 8(%%esi),%%eax; adcl %%eax,8(%%edi);\n"
-                 :"=g" (*dest):"g" (dest), "g" (x2)
-                 :"ax","si","di");
+	asm volatile ("movl %1,%%edi; movl %2,%%esi;\n"
+		      "movl (%%esi),%%eax; addl %%eax,(%%edi);\n"
+		      "movl 4(%%esi),%%eax; adcl %%eax,4(%%edi);\n"
+		      "movl 8(%%esi),%%eax; adcl %%eax,8(%%edi);\n":"=g"
+		      (*dest):"g"(dest), "g"(x2)
+		      :"ax", "si", "di");
 }
 
-
 /* Add the 12 byte Xsig x2 to Xsig dest, adjust exp if overflow occurs. */
 /* Note: the constraints in the asm statement didn't always work properly
    with gcc 2.5.8.  Changing from using edi to using ecx got around the
    problem, but keep fingers crossed! */
-static inline void add_two_Xsig(Xsig *dest, const Xsig *x2, long int *exp)
+static inline void add_two_Xsig(Xsig * dest, const Xsig * x2, long int *exp)
 {
-  asm volatile ("movl %2,%%ecx; movl %3,%%esi;\n"
-                "movl (%%esi),%%eax; addl %%eax,(%%ecx);\n"
-                "movl 4(%%esi),%%eax; adcl %%eax,4(%%ecx);\n"
-                "movl 8(%%esi),%%eax; adcl %%eax,8(%%ecx);\n"
-                "jnc 0f;\n"
-		"rcrl 8(%%ecx); rcrl 4(%%ecx); rcrl (%%ecx)\n"
-                "movl %4,%%ecx; incl (%%ecx)\n"
-                "movl $1,%%eax; jmp 1f;\n"
-                "0: xorl %%eax,%%eax;\n"
-                "1:\n"
-		:"=g" (*exp), "=g" (*dest)
-		:"g" (dest), "g" (x2), "g" (exp)
-		:"cx","si","ax");
+	asm volatile ("movl %2,%%ecx; movl %3,%%esi;\n"
+		      "movl (%%esi),%%eax; addl %%eax,(%%ecx);\n"
+		      "movl 4(%%esi),%%eax; adcl %%eax,4(%%ecx);\n"
+		      "movl 8(%%esi),%%eax; adcl %%eax,8(%%ecx);\n"
+		      "jnc 0f;\n"
+		      "rcrl 8(%%ecx); rcrl 4(%%ecx); rcrl (%%ecx)\n"
+		      "movl %4,%%ecx; incl (%%ecx)\n"
+		      "movl $1,%%eax; jmp 1f;\n"
+		      "0: xorl %%eax,%%eax;\n" "1:\n":"=g" (*exp), "=g"(*dest)
+		      :"g"(dest), "g"(x2), "g"(exp)
+		      :"cx", "si", "ax");
 }
 
-
 /* Negate (subtract from 1.0) the 12 byte Xsig */
 /* This is faster in a loop on my 386 than using the "neg" instruction. */
-static inline void negate_Xsig(Xsig *x)
+static inline void negate_Xsig(Xsig * x)
 {
-  asm volatile("movl %1,%%esi;\n"
-               "xorl %%ecx,%%ecx;\n"
-               "movl %%ecx,%%eax; subl (%%esi),%%eax; movl %%eax,(%%esi);\n"
-               "movl %%ecx,%%eax; sbbl 4(%%esi),%%eax; movl %%eax,4(%%esi);\n"
-               "movl %%ecx,%%eax; sbbl 8(%%esi),%%eax; movl %%eax,8(%%esi);\n"
-               :"=g" (*x):"g" (x):"si","ax","cx");
+	asm volatile ("movl %1,%%esi;\n"
+		      "xorl %%ecx,%%ecx;\n"
+		      "movl %%ecx,%%eax; subl (%%esi),%%eax; movl %%eax,(%%esi);\n"
+		      "movl %%ecx,%%eax; sbbl 4(%%esi),%%eax; movl %%eax,4(%%esi);\n"
+		      "movl %%ecx,%%eax; sbbl 8(%%esi),%%eax; movl %%eax,8(%%esi);\n":"=g"
+		      (*x):"g"(x):"si", "ax", "cx");
 }
 
 #endif /* _POLY_H */

arch/x86/math-emu/poly_2xm1.c

@@ -17,21 +17,19 @@
 #include "control_w.h"
 #include "poly.h"
 
-
 #define	HIPOWER	11
-static const unsigned long long lterms[HIPOWER] =
-{
-  0x0000000000000000LL,  /* This term done separately as 12 bytes */
-  0xf5fdeffc162c7543LL,
-  0x1c6b08d704a0bfa6LL,
-  0x0276556df749cc21LL,
-  0x002bb0ffcf14f6b8LL,
-  0x0002861225ef751cLL,
-  0x00001ffcbfcd5422LL,
-  0x00000162c005d5f1LL,
-  0x0000000da96ccb1bLL,
-  0x0000000078d1b897LL,
-  0x000000000422b029LL
+static const unsigned long long lterms[HIPOWER] = {
+	0x0000000000000000LL,	/* This term done separately as 12 bytes */
+	0xf5fdeffc162c7543LL,
+	0x1c6b08d704a0bfa6LL,
+	0x0276556df749cc21LL,
+	0x002bb0ffcf14f6b8LL,
+	0x0002861225ef751cLL,
+	0x00001ffcbfcd5422LL,
+	0x00000162c005d5f1LL,
+	0x0000000da96ccb1bLL,
+	0x0000000078d1b897LL,
+	0x000000000422b029LL
 };
 
 static const Xsig hiterm = MK_XSIG(0xb17217f7, 0xd1cf79ab, 0xc8a39194);
@@ -45,112 +43,103 @@ static const Xsig shiftterm2 = MK_XSIG(0xb504f333, 0xf9de6484, 0x597d89b3);
 static const Xsig shiftterm3 = MK_XSIG(0xd744fcca, 0xd69d6af4, 0x39a68bb9);
 
 static const Xsig *shiftterm[] = { &shiftterm0, &shiftterm1,
-				     &shiftterm2, &shiftterm3 };
-
+	&shiftterm2, &shiftterm3
+};
 
 /*--- poly_2xm1() -----------------------------------------------------------+
  | Requires st(0) which is TAG_Valid and < 1.                                |
  +---------------------------------------------------------------------------*/
-int	poly_2xm1(u_char sign, FPU_REG *arg, FPU_REG *result)
+int poly_2xm1(u_char sign, FPU_REG * arg, FPU_REG * result)
 {
-  long int              exponent, shift;
-  unsigned long long    Xll;
-  Xsig                  accumulator, Denom, argSignif;
-  u_char                tag;
+	long int exponent, shift;
+	unsigned long long Xll;
+	Xsig accumulator, Denom, argSignif;
+	u_char tag;
 
-  exponent = exponent16(arg);
+	exponent = exponent16(arg);
 
 #ifdef PARANOID
-  if ( exponent >= 0 )    	/* Don't want a |number| >= 1.0 */
-    {
-      /* Number negative, too large, or not Valid. */
-      EXCEPTION(EX_INTERNAL|0x127);
-      return 1;
-    }
+	if (exponent >= 0) {	/* Don't want a |number| >= 1.0 */
+		/* Number negative, too large, or not Valid. */
+		EXCEPTION(EX_INTERNAL | 0x127);
+		return 1;
+	}
 #endif /* PARANOID */
 
-  argSignif.lsw = 0;
-  XSIG_LL(argSignif) = Xll = significand(arg);
-
-  if ( exponent == -1 )
-    {
-      shift = (argSignif.msw & 0x40000000) ? 3 : 2;
-      /* subtract 0.5 or 0.75 */
-      exponent -= 2;
-      XSIG_LL(argSignif) <<= 2;
-      Xll <<= 2;
-    }
-  else if ( exponent == -2 )
-    {
-      shift = 1;
-      /* subtract 0.25 */
-      exponent--;
-      XSIG_LL(argSignif) <<= 1;
-      Xll <<= 1;
-    }
-  else
-    shift = 0;
-
-  if ( exponent < -2 )
-    {
-      /* Shift the argument right by the required places. */
-      if ( FPU_shrx(&Xll, -2-exponent) >= 0x80000000U )
-	Xll++;	/* round up */
-    }
-
-  accumulator.lsw = accumulator.midw = accumulator.msw = 0;
-  polynomial_Xsig(&accumulator, &Xll, lterms, HIPOWER-1);
-  mul_Xsig_Xsig(&accumulator, &argSignif);
-  shr_Xsig(&accumulator, 3);
-
-  mul_Xsig_Xsig(&argSignif, &hiterm);   /* The leading term */
-  add_two_Xsig(&accumulator, &argSignif, &exponent);
-
-  if ( shift )
-    {
-      /* The argument is large, use the identity:
-	 f(x+a) = f(a) * (f(x) + 1) - 1;
-	 */
-      shr_Xsig(&accumulator, - exponent);
-      accumulator.msw |= 0x80000000;      /* add 1.0 */
-      mul_Xsig_Xsig(&accumulator, shiftterm[shift]);
-      accumulator.msw &= 0x3fffffff;      /* subtract 1.0 */
-      exponent = 1;
-    }
-
-  if ( sign != SIGN_POS )
-    {
-      /* The argument is negative, use the identity:
-	     f(-x) = -f(x) / (1 + f(x))
-	 */
-      Denom.lsw = accumulator.lsw;
-      XSIG_LL(Denom) = XSIG_LL(accumulator);
-      if ( exponent < 0 )
-	shr_Xsig(&Denom, - exponent);
-      else if ( exponent > 0 )
-	{
-	  /* exponent must be 1 here */
-	  XSIG_LL(Denom) <<= 1;
-	  if ( Denom.lsw & 0x80000000 )
-	    XSIG_LL(Denom) |= 1;
-	  (Denom.lsw) <<= 1;
+	argSignif.lsw = 0;
+	XSIG_LL(argSignif) = Xll = significand(arg);
+
+	if (exponent == -1) {
+		shift = (argSignif.msw & 0x40000000) ? 3 : 2;
+		/* subtract 0.5 or 0.75 */
+		exponent -= 2;
+		XSIG_LL(argSignif) <<= 2;
+		Xll <<= 2;
+	} else if (exponent == -2) {
+		shift = 1;
+		/* subtract 0.25 */
+		exponent--;
+		XSIG_LL(argSignif) <<= 1;
+		Xll <<= 1;
+	} else
+		shift = 0;
+
+	if (exponent < -2) {
+		/* Shift the argument right by the required places. */
+		if (FPU_shrx(&Xll, -2 - exponent) >= 0x80000000U)
+			Xll++;	/* round up */
+	}
+
+	accumulator.lsw = accumulator.midw = accumulator.msw = 0;
+	polynomial_Xsig(&accumulator, &Xll, lterms, HIPOWER - 1);
+	mul_Xsig_Xsig(&accumulator, &argSignif);
+	shr_Xsig(&accumulator, 3);
+
+	mul_Xsig_Xsig(&argSignif, &hiterm);	/* The leading term */
+	add_two_Xsig(&accumulator, &argSignif, &exponent);
+
+	if (shift) {
+		/* The argument is large, use the identity:
+		   f(x+a) = f(a) * (f(x) + 1) - 1;
+		 */
+		shr_Xsig(&accumulator, -exponent);
+		accumulator.msw |= 0x80000000;	/* add 1.0 */
+		mul_Xsig_Xsig(&accumulator, shiftterm[shift]);
+		accumulator.msw &= 0x3fffffff;	/* subtract 1.0 */
+		exponent = 1;
+	}
+
+	if (sign != SIGN_POS) {
+		/* The argument is negative, use the identity:
+		   f(-x) = -f(x) / (1 + f(x))
+		 */
+		Denom.lsw = accumulator.lsw;
+		XSIG_LL(Denom) = XSIG_LL(accumulator);
+		if (exponent < 0)
+			shr_Xsig(&Denom, -exponent);
+		else if (exponent > 0) {
+			/* exponent must be 1 here */
+			XSIG_LL(Denom) <<= 1;
+			if (Denom.lsw & 0x80000000)
+				XSIG_LL(Denom) |= 1;
+			(Denom.lsw) <<= 1;
+		}
+		Denom.msw |= 0x80000000;	/* add 1.0 */
+		div_Xsig(&accumulator, &Denom, &accumulator);
 	}
-      Denom.msw |= 0x80000000;      /* add 1.0 */
-      div_Xsig(&accumulator, &Denom, &accumulator);
-    }
 
-  /* Convert to 64 bit signed-compatible */
-  exponent += round_Xsig(&accumulator);
+	/* Convert to 64 bit signed-compatible */
+	exponent += round_Xsig(&accumulator);
 
-  result = &st(0);
-  significand(result) = XSIG_LL(accumulator);
-  setexponent16(result, exponent);
+	result = &st(0);
+	significand(result) = XSIG_LL(accumulator);
+	setexponent16(result, exponent);
 
-  tag = FPU_round(result, 1, 0, FULL_PRECISION, sign);
+	tag = FPU_round(result, 1, 0, FULL_PRECISION, sign);
 
-  setsign(result, sign);
-  FPU_settag0(tag);
+	setsign(result, sign);
+	FPU_settag0(tag);
 
-  return 0;
+	return 0;
 
 }

arch/x86/math-emu/poly_atan.c

@@ -18,28 +18,25 @@
 #include "control_w.h"
 #include "poly.h"
 
-
 #define	HIPOWERon	6	/* odd poly, negative terms */
-static const unsigned long long oddnegterms[HIPOWERon] =
-{
-  0x0000000000000000LL, /* Dummy (not for - 1.0) */
-  0x015328437f756467LL,
-  0x0005dda27b73dec6LL,
-  0x0000226bf2bfb91aLL,
-  0x000000ccc439c5f7LL,
-  0x0000000355438407LL
-} ;
+static const unsigned long long oddnegterms[HIPOWERon] = {
+	0x0000000000000000LL,	/* Dummy (not for - 1.0) */
+	0x015328437f756467LL,
+	0x0005dda27b73dec6LL,
+	0x0000226bf2bfb91aLL,
+	0x000000ccc439c5f7LL,
+	0x0000000355438407LL
+};
 
 #define	HIPOWERop	6	/* odd poly, positive terms */
-static const unsigned long long oddplterms[HIPOWERop] =
-{
+static const unsigned long long oddplterms[HIPOWERop] = {
 /*  0xaaaaaaaaaaaaaaabLL,  transferred to fixedpterm[] */
-  0x0db55a71875c9ac2LL,
-  0x0029fce2d67880b0LL,
-  0x0000dfd3908b4596LL,
-  0x00000550fd61dab4LL,
-  0x0000001c9422b3f9LL,
-  0x000000003e3301e1LL
+	0x0db55a71875c9ac2LL,
+	0x0029fce2d67880b0LL,
+	0x0000dfd3908b4596LL,
+	0x00000550fd61dab4LL,
+	0x0000001c9422b3f9LL,
+	0x000000003e3301e1LL
 };
 
 static const unsigned long long denomterm = 0xebd9b842c5c53a0eLL;
@@ -48,182 +45,164 @@ static const Xsig fixedpterm = MK_XSIG(0xaaaaaaaa, 0xaaaaaaaa, 0xaaaaaaaa);
 
 static const Xsig pi_signif = MK_XSIG(0xc90fdaa2, 0x2168c234, 0xc4c6628b);
 
-
 /*--- poly_atan() -----------------------------------------------------------+
  |                                                                           |
  +---------------------------------------------------------------------------*/
-void	poly_atan(FPU_REG *st0_ptr, u_char st0_tag,
-		  FPU_REG *st1_ptr, u_char st1_tag)
+void poly_atan(FPU_REG * st0_ptr, u_char st0_tag,
+	       FPU_REG * st1_ptr, u_char st1_tag)
 {
-  u_char	transformed, inverted,
-                sign1, sign2;
-  int           exponent;
-  long int   	dummy_exp;
-  Xsig          accumulator, Numer, Denom, accumulatore, argSignif,
-                argSq, argSqSq;
-  u_char        tag;
-  
-  sign1 = getsign(st0_ptr);
-  sign2 = getsign(st1_ptr);
-  if ( st0_tag == TAG_Valid )
-    {
-      exponent = exponent(st0_ptr);
-    }
-  else
-    {
-      /* This gives non-compatible stack contents... */
-      FPU_to_exp16(st0_ptr, st0_ptr);
-      exponent = exponent16(st0_ptr);
-    }
-  if ( st1_tag == TAG_Valid )
-    {
-      exponent -= exponent(st1_ptr);
-    }
-  else
-    {
-      /* This gives non-compatible stack contents... */
-      FPU_to_exp16(st1_ptr, st1_ptr);
-      exponent -= exponent16(st1_ptr);
-    }
-
-  if ( (exponent < 0) || ((exponent == 0) &&
-			  ((st0_ptr->sigh < st1_ptr->sigh) ||
-			   ((st0_ptr->sigh == st1_ptr->sigh) &&
-			    (st0_ptr->sigl < st1_ptr->sigl))) ) )
-    {
-      inverted = 1;
-      Numer.lsw = Denom.lsw = 0;
-      XSIG_LL(Numer) = significand(st0_ptr);
-      XSIG_LL(Denom) = significand(st1_ptr);
-    }
-  else
-    {
-      inverted = 0;
-      exponent = -exponent;
-      Numer.lsw = Denom.lsw = 0;
-      XSIG_LL(Numer) = significand(st1_ptr);
-      XSIG_LL(Denom) = significand(st0_ptr);
-     }
-  div_Xsig(&Numer, &Denom, &argSignif);
-  exponent += norm_Xsig(&argSignif);
-
-  if ( (exponent >= -1)
-      || ((exponent == -2) && (argSignif.msw > 0xd413ccd0)) )
-    {
-      /* The argument is greater than sqrt(2)-1 (=0.414213562...) */
-      /* Convert the argument by an identity for atan */
-      transformed = 1;
-
-      if ( exponent >= 0 )
-	{
+	u_char transformed, inverted, sign1, sign2;
+	int exponent;
+	long int dummy_exp;
+	Xsig accumulator, Numer, Denom, accumulatore, argSignif, argSq, argSqSq;
+	u_char tag;
+
+	sign1 = getsign(st0_ptr);
+	sign2 = getsign(st1_ptr);
+	if (st0_tag == TAG_Valid) {
+		exponent = exponent(st0_ptr);
+	} else {
+		/* This gives non-compatible stack contents... */
+		FPU_to_exp16(st0_ptr, st0_ptr);
+		exponent = exponent16(st0_ptr);
+	}
+	if (st1_tag == TAG_Valid) {
+		exponent -= exponent(st1_ptr);
+	} else {
+		/* This gives non-compatible stack contents... */
+		FPU_to_exp16(st1_ptr, st1_ptr);
+		exponent -= exponent16(st1_ptr);
+	}
+
+	if ((exponent < 0) || ((exponent == 0) &&
+			       ((st0_ptr->sigh < st1_ptr->sigh) ||
+				((st0_ptr->sigh == st1_ptr->sigh) &&
+				 (st0_ptr->sigl < st1_ptr->sigl))))) {
+		inverted = 1;
+		Numer.lsw = Denom.lsw = 0;
+		XSIG_LL(Numer) = significand(st0_ptr);
+		XSIG_LL(Denom) = significand(st1_ptr);
+	} else {
+		inverted = 0;
+		exponent = -exponent;
+		Numer.lsw = Denom.lsw = 0;
+		XSIG_LL(Numer) = significand(st1_ptr);
+		XSIG_LL(Denom) = significand(st0_ptr);
+	}
+	div_Xsig(&Numer, &Denom, &argSignif);
+	exponent += norm_Xsig(&argSignif);
+
+	if ((exponent >= -1)
+	    || ((exponent == -2) && (argSignif.msw > 0xd413ccd0))) {
+		/* The argument is greater than sqrt(2)-1 (=0.414213562...) */
+		/* Convert the argument by an identity for atan */
+		transformed = 1;
+
+		if (exponent >= 0) {
 #ifdef PARANOID
-	  if ( !( (exponent == 0) && 
-		 (argSignif.lsw == 0) && (argSignif.midw == 0) &&
-		 (argSignif.msw == 0x80000000) ) )
-	    {
-	      EXCEPTION(EX_INTERNAL|0x104);  /* There must be a logic error */
-	      return;
-	    }
+			if (!((exponent == 0) &&
+			      (argSignif.lsw == 0) && (argSignif.midw == 0) &&
+			      (argSignif.msw == 0x80000000))) {
+				EXCEPTION(EX_INTERNAL | 0x104);	/* There must be a logic error */
+				return;
+			}
 #endif /* PARANOID */
-	  argSignif.msw = 0;   /* Make the transformed arg -> 0.0 */
+			argSignif.msw = 0;	/* Make the transformed arg -> 0.0 */
+		} else {
+			Numer.lsw = Denom.lsw = argSignif.lsw;
+			XSIG_LL(Numer) = XSIG_LL(Denom) = XSIG_LL(argSignif);
+
+			if (exponent < -1)
+				shr_Xsig(&Numer, -1 - exponent);
+			negate_Xsig(&Numer);
+
+			shr_Xsig(&Denom, -exponent);
+			Denom.msw |= 0x80000000;
+
+			div_Xsig(&Numer, &Denom, &argSignif);
+
+			exponent = -1 + norm_Xsig(&argSignif);
+		}
+	} else {
+		transformed = 0;
+	}
+
+	argSq.lsw = argSignif.lsw;
+	argSq.midw = argSignif.midw;
+	argSq.msw = argSignif.msw;
+	mul_Xsig_Xsig(&argSq, &argSq);
+
+	argSqSq.lsw = argSq.lsw;
+	argSqSq.midw = argSq.midw;
+	argSqSq.msw = argSq.msw;
+	mul_Xsig_Xsig(&argSqSq, &argSqSq);
+
+	accumulatore.lsw = argSq.lsw;
+	XSIG_LL(accumulatore) = XSIG_LL(argSq);
+
+	shr_Xsig(&argSq, 2 * (-1 - exponent - 1));
+	shr_Xsig(&argSqSq, 4 * (-1 - exponent - 1));
+
+	/* Now have argSq etc with binary point at the left
+	   .1xxxxxxxx */
+
+	/* Do the basic fixed point polynomial evaluation */
+	accumulator.msw = accumulator.midw = accumulator.lsw = 0;
+	polynomial_Xsig(&accumulator, &XSIG_LL(argSqSq),
+			oddplterms, HIPOWERop - 1);
+	mul64_Xsig(&accumulator, &XSIG_LL(argSq));
+	negate_Xsig(&accumulator);
+	polynomial_Xsig(&accumulator, &XSIG_LL(argSqSq), oddnegterms,
+			HIPOWERon - 1);
+	negate_Xsig(&accumulator);
+	add_two_Xsig(&accumulator, &fixedpterm, &dummy_exp);
+
+	mul64_Xsig(&accumulatore, &denomterm);
+	shr_Xsig(&accumulatore, 1 + 2 * (-1 - exponent));
+	accumulatore.msw |= 0x80000000;
+
+	div_Xsig(&accumulator, &accumulatore, &accumulator);
+
+	mul_Xsig_Xsig(&accumulator, &argSignif);
+	mul_Xsig_Xsig(&accumulator, &argSq);
+
+	shr_Xsig(&accumulator, 3);
+	negate_Xsig(&accumulator);
+	add_Xsig_Xsig(&accumulator, &argSignif);
+
+	if (transformed) {
+		/* compute pi/4 - accumulator */
+		shr_Xsig(&accumulator, -1 - exponent);
+		negate_Xsig(&accumulator);
+		add_Xsig_Xsig(&accumulator, &pi_signif);
+		exponent = -1;
+	}
+
+	if (inverted) {
+		/* compute pi/2 - accumulator */
+		shr_Xsig(&accumulator, -exponent);
+		negate_Xsig(&accumulator);
+		add_Xsig_Xsig(&accumulator, &pi_signif);
+		exponent = 0;
 	}
-      else
-	{
-	  Numer.lsw = Denom.lsw = argSignif.lsw;
-	  XSIG_LL(Numer) = XSIG_LL(Denom) = XSIG_LL(argSignif);
-
-	  if ( exponent < -1 )
-	    shr_Xsig(&Numer, -1-exponent);
-	  negate_Xsig(&Numer);
-      
-	  shr_Xsig(&Denom, -exponent);
-	  Denom.msw |= 0x80000000;
-      
-	  div_Xsig(&Numer, &Denom, &argSignif);
-
-	  exponent = -1 + norm_Xsig(&argSignif);
+
+	if (sign1) {
+		/* compute pi - accumulator */
+		shr_Xsig(&accumulator, 1 - exponent);
+		negate_Xsig(&accumulator);
+		add_Xsig_Xsig(&accumulator, &pi_signif);
+		exponent = 1;
 	}
-    }
-  else
-    {
-      transformed = 0;
-    }
-
-  argSq.lsw = argSignif.lsw; argSq.midw = argSignif.midw;
-  argSq.msw = argSignif.msw;
-  mul_Xsig_Xsig(&argSq, &argSq);
-  
-  argSqSq.lsw = argSq.lsw; argSqSq.midw = argSq.midw; argSqSq.msw = argSq.msw;
-  mul_Xsig_Xsig(&argSqSq, &argSqSq);
-
-  accumulatore.lsw = argSq.lsw;
-  XSIG_LL(accumulatore) = XSIG_LL(argSq);
-
-  shr_Xsig(&argSq, 2*(-1-exponent-1));
-  shr_Xsig(&argSqSq, 4*(-1-exponent-1));
-
-  /* Now have argSq etc with binary point at the left
-     .1xxxxxxxx */
-
-  /* Do the basic fixed point polynomial evaluation */
-  accumulator.msw = accumulator.midw = accumulator.lsw = 0;
-  polynomial_Xsig(&accumulator, &XSIG_LL(argSqSq),
-		   oddplterms, HIPOWERop-1);
-  mul64_Xsig(&accumulator, &XSIG_LL(argSq));
-  negate_Xsig(&accumulator);
-  polynomial_Xsig(&accumulator, &XSIG_LL(argSqSq), oddnegterms, HIPOWERon-1);
-  negate_Xsig(&accumulator);
-  add_two_Xsig(&accumulator, &fixedpterm, &dummy_exp);
-
-  mul64_Xsig(&accumulatore, &denomterm);
-  shr_Xsig(&accumulatore, 1 + 2*(-1-exponent));
-  accumulatore.msw |= 0x80000000;
-
-  div_Xsig(&accumulator, &accumulatore, &accumulator);
-
-  mul_Xsig_Xsig(&accumulator, &argSignif);
-  mul_Xsig_Xsig(&accumulator, &argSq);
-
-  shr_Xsig(&accumulator, 3);
-  negate_Xsig(&accumulator);
-  add_Xsig_Xsig(&accumulator, &argSignif);
-
-  if ( transformed )
-    {
-      /* compute pi/4 - accumulator */
-      shr_Xsig(&accumulator, -1-exponent);
-      negate_Xsig(&accumulator);
-      add_Xsig_Xsig(&accumulator, &pi_signif);
-      exponent = -1;
-    }
-
-  if ( inverted )
-    {
-      /* compute pi/2 - accumulator */
-      shr_Xsig(&accumulator, -exponent);
-      negate_Xsig(&accumulator);
-      add_Xsig_Xsig(&accumulator, &pi_signif);
-      exponent = 0;
-    }
-
-  if ( sign1 )
-    {
-      /* compute pi - accumulator */
-      shr_Xsig(&accumulator, 1 - exponent);
-      negate_Xsig(&accumulator);
-      add_Xsig_Xsig(&accumulator, &pi_signif);
-      exponent = 1;
-    }
-
-  exponent += round_Xsig(&accumulator);
-
-  significand(st1_ptr) = XSIG_LL(accumulator);
-  setexponent16(st1_ptr, exponent);
-
-  tag = FPU_round(st1_ptr, 1, 0, FULL_PRECISION, sign2);
-  FPU_settagi(1, tag);
-
-  set_precision_flag_up();  /* We do not really know if up or down,
-			       use this as the default. */
+
+	exponent += round_Xsig(&accumulator);
+
+	significand(st1_ptr) = XSIG_LL(accumulator);
+	setexponent16(st1_ptr, exponent);
+
+	tag = FPU_round(st1_ptr, 1, 0, FULL_PRECISION, sign2);
+	FPU_settagi(1, tag);
+
+	set_precision_flag_up();	/* We do not really know if up or down,
+					   use this as the default. */
 
 }

arch/x86/math-emu/poly_l2.c

@@ -10,7 +10,6 @@
  |                                                                           |
  +---------------------------------------------------------------------------*/
 
-
 #include "exception.h"
 #include "reg_constant.h"
 #include "fpu_emu.h"
@@ -18,255 +17,228 @@
 #include "control_w.h"
 #include "poly.h"
 
-
 static void log2_kernel(FPU_REG const *arg, u_char argsign,
-			Xsig *accum_result, long int *expon);
-
+			Xsig * accum_result, long int *expon);
 
 /*--- poly_l2() -------------------------------------------------------------+
  |   Base 2 logarithm by a polynomial approximation.                         |
  +---------------------------------------------------------------------------*/
-void	poly_l2(FPU_REG *st0_ptr, FPU_REG *st1_ptr, u_char st1_sign)
+void poly_l2(FPU_REG * st0_ptr, FPU_REG * st1_ptr, u_char st1_sign)
 {
-  long int	       exponent, expon, expon_expon;
-  Xsig                 accumulator, expon_accum, yaccum;
-  u_char		       sign, argsign;
-  FPU_REG              x;
-  int                  tag;
-
-  exponent = exponent16(st0_ptr);
-
-  /* From st0_ptr, make a number > sqrt(2)/2 and < sqrt(2) */
-  if ( st0_ptr->sigh > (unsigned)0xb504f334 )
-    {
-      /* Treat as  sqrt(2)/2 < st0_ptr < 1 */
-      significand(&x) = - significand(st0_ptr);
-      setexponent16(&x, -1);
-      exponent++;
-      argsign = SIGN_NEG;
-    }
-  else
-    {
-      /* Treat as  1 <= st0_ptr < sqrt(2) */
-      x.sigh = st0_ptr->sigh - 0x80000000;
-      x.sigl = st0_ptr->sigl;
-      setexponent16(&x, 0);
-      argsign = SIGN_POS;
-    }
-  tag = FPU_normalize_nuo(&x);
-
-  if ( tag == TAG_Zero )
-    {
-      expon = 0;
-      accumulator.msw = accumulator.midw = accumulator.lsw = 0;
-    }
-  else
-    {
-      log2_kernel(&x, argsign, &accumulator, &expon);
-    }
-
-  if ( exponent < 0 )
-    {
-      sign = SIGN_NEG;
-      exponent = -exponent;
-    }
-  else
-    sign = SIGN_POS;
-  expon_accum.msw = exponent; expon_accum.midw = expon_accum.lsw = 0;
-  if ( exponent )
-    {
-      expon_expon = 31 + norm_Xsig(&expon_accum);
-      shr_Xsig(&accumulator, expon_expon - expon);
-
-      if ( sign ^ argsign )
-	negate_Xsig(&accumulator);
-      add_Xsig_Xsig(&accumulator, &expon_accum);
-    }
-  else
-    {
-      expon_expon = expon;
-      sign = argsign;
-    }
-
-  yaccum.lsw = 0; XSIG_LL(yaccum) = significand(st1_ptr);
-  mul_Xsig_Xsig(&accumulator, &yaccum);
-
-  expon_expon += round_Xsig(&accumulator);
-
-  if ( accumulator.msw == 0 )
-    {
-      FPU_copy_to_reg1(&CONST_Z, TAG_Zero);
-      return;
-    }
-
-  significand(st1_ptr) = XSIG_LL(accumulator);
-  setexponent16(st1_ptr, expon_expon + exponent16(st1_ptr) + 1);
-
-  tag = FPU_round(st1_ptr, 1, 0, FULL_PRECISION, sign ^ st1_sign);
-  FPU_settagi(1, tag);
-
-  set_precision_flag_up();  /* 80486 appears to always do this */
-
-  return;
+	long int exponent, expon, expon_expon;
+	Xsig accumulator, expon_accum, yaccum;
+	u_char sign, argsign;
+	FPU_REG x;
+	int tag;
+
+	exponent = exponent16(st0_ptr);
+
+	/* From st0_ptr, make a number > sqrt(2)/2 and < sqrt(2) */
+	if (st0_ptr->sigh > (unsigned)0xb504f334) {
+		/* Treat as  sqrt(2)/2 < st0_ptr < 1 */
+		significand(&x) = -significand(st0_ptr);
+		setexponent16(&x, -1);
+		exponent++;
+		argsign = SIGN_NEG;
+	} else {
+		/* Treat as  1 <= st0_ptr < sqrt(2) */
+		x.sigh = st0_ptr->sigh - 0x80000000;
+		x.sigl = st0_ptr->sigl;
+		setexponent16(&x, 0);
+		argsign = SIGN_POS;
+	}
+	tag = FPU_normalize_nuo(&x);
 
-}
+	if (tag == TAG_Zero) {
+		expon = 0;
+		accumulator.msw = accumulator.midw = accumulator.lsw = 0;
+	} else {
+		log2_kernel(&x, argsign, &accumulator, &expon);
+	}
+
+	if (exponent < 0) {
+		sign = SIGN_NEG;
+		exponent = -exponent;
+	} else
+		sign = SIGN_POS;
+	expon_accum.msw = exponent;
+	expon_accum.midw = expon_accum.lsw = 0;
+	if (exponent) {
+		expon_expon = 31 + norm_Xsig(&expon_accum);
+		shr_Xsig(&accumulator, expon_expon - expon);
+
+		if (sign ^ argsign)
+			negate_Xsig(&accumulator);
+		add_Xsig_Xsig(&accumulator, &expon_accum);
+	} else {
+		expon_expon = expon;
+		sign = argsign;
+	}
+
+	yaccum.lsw = 0;
+	XSIG_LL(yaccum) = significand(st1_ptr);
+	mul_Xsig_Xsig(&accumulator, &yaccum);
+
+	expon_expon += round_Xsig(&accumulator);
+
+	if (accumulator.msw == 0) {
+		FPU_copy_to_reg1(&CONST_Z, TAG_Zero);
+		return;
+	}
+
+	significand(st1_ptr) = XSIG_LL(accumulator);
+	setexponent16(st1_ptr, expon_expon + exponent16(st1_ptr) + 1);
 
+	tag = FPU_round(st1_ptr, 1, 0, FULL_PRECISION, sign ^ st1_sign);
+	FPU_settagi(1, tag);
+
+	set_precision_flag_up();	/* 80486 appears to always do this */
+
+	return;
+
+}
 
 /*--- poly_l2p1() -----------------------------------------------------------+
  |   Base 2 logarithm by a polynomial approximation.                         |
  |   log2(x+1)                                                               |
  +---------------------------------------------------------------------------*/
-int	poly_l2p1(u_char sign0, u_char sign1,
-		  FPU_REG *st0_ptr, FPU_REG *st1_ptr, FPU_REG *dest)
+int poly_l2p1(u_char sign0, u_char sign1,
+	      FPU_REG * st0_ptr, FPU_REG * st1_ptr, FPU_REG * dest)
 {
-  u_char             	tag;
-  long int        	exponent;
-  Xsig              	accumulator, yaccum;
+	u_char tag;
+	long int exponent;
+	Xsig accumulator, yaccum;
 
-  if ( exponent16(st0_ptr) < 0 )
-    {
-      log2_kernel(st0_ptr, sign0, &accumulator, &exponent);
+	if (exponent16(st0_ptr) < 0) {
+		log2_kernel(st0_ptr, sign0, &accumulator, &exponent);
 
-      yaccum.lsw = 0;
-      XSIG_LL(yaccum) = significand(st1_ptr);
-      mul_Xsig_Xsig(&accumulator, &yaccum);
+		yaccum.lsw = 0;
+		XSIG_LL(yaccum) = significand(st1_ptr);
+		mul_Xsig_Xsig(&accumulator, &yaccum);
 
-      exponent += round_Xsig(&accumulator);
+		exponent += round_Xsig(&accumulator);
 
-      exponent += exponent16(st1_ptr) + 1;
-      if ( exponent < EXP_WAY_UNDER ) exponent = EXP_WAY_UNDER;
+		exponent += exponent16(st1_ptr) + 1;
+		if (exponent < EXP_WAY_UNDER)
+			exponent = EXP_WAY_UNDER;
 
-      significand(dest) = XSIG_LL(accumulator);
-      setexponent16(dest, exponent);
+		significand(dest) = XSIG_LL(accumulator);
+		setexponent16(dest, exponent);
 
-      tag = FPU_round(dest, 1, 0, FULL_PRECISION, sign0 ^ sign1);
-      FPU_settagi(1, tag);
+		tag = FPU_round(dest, 1, 0, FULL_PRECISION, sign0 ^ sign1);
+		FPU_settagi(1, tag);
 
-      if ( tag == TAG_Valid )
-	set_precision_flag_up();   /* 80486 appears to always do this */
-    }
-  else
-    {
-      /* The magnitude of st0_ptr is far too large. */
+		if (tag == TAG_Valid)
+			set_precision_flag_up();	/* 80486 appears to always do this */
+	} else {
+		/* The magnitude of st0_ptr is far too large. */
 
-      if ( sign0 != SIGN_POS )
-	{
-	  /* Trying to get the log of a negative number. */
-#ifdef PECULIAR_486   /* Stupid 80486 doesn't worry about log(negative). */
-	  changesign(st1_ptr);
+		if (sign0 != SIGN_POS) {
+			/* Trying to get the log of a negative number. */
+#ifdef PECULIAR_486		/* Stupid 80486 doesn't worry about log(negative). */
+			changesign(st1_ptr);
 #else
-	  if ( arith_invalid(1) < 0 )
-	    return 1;
+			if (arith_invalid(1) < 0)
+				return 1;
 #endif /* PECULIAR_486 */
-	}
+		}
 
-      /* 80486 appears to do this */
-      if ( sign0 == SIGN_NEG )
-	set_precision_flag_down();
-      else
-	set_precision_flag_up();
-    }
+		/* 80486 appears to do this */
+		if (sign0 == SIGN_NEG)
+			set_precision_flag_down();
+		else
+			set_precision_flag_up();
+	}
 
-  if ( exponent(dest) <= EXP_UNDER )
-    EXCEPTION(EX_Underflow);
+	if (exponent(dest) <= EXP_UNDER)
+		EXCEPTION(EX_Underflow);
 
-  return 0;
+	return 0;
 
 }
 
-
-
-
 #undef HIPOWER
 #define	HIPOWER	10
-static const unsigned long long logterms[HIPOWER] =
-{
-  0x2a8eca5705fc2ef0LL,
-  0xf6384ee1d01febceLL,
-  0x093bb62877cdf642LL,
-  0x006985d8a9ec439bLL,
-  0x0005212c4f55a9c8LL,
-  0x00004326a16927f0LL,
-  0x0000038d1d80a0e7LL,
-  0x0000003141cc80c6LL,
-  0x00000002b1668c9fLL,
-  0x000000002c7a46aaLL
+static const unsigned long long logterms[HIPOWER] = {
+	0x2a8eca5705fc2ef0LL,
+	0xf6384ee1d01febceLL,
+	0x093bb62877cdf642LL,
+	0x006985d8a9ec439bLL,
+	0x0005212c4f55a9c8LL,
+	0x00004326a16927f0LL,
+	0x0000038d1d80a0e7LL,
+	0x0000003141cc80c6LL,
+	0x00000002b1668c9fLL,
+	0x000000002c7a46aaLL
 };
 
 static const unsigned long leadterm = 0xb8000000;
 
-
 /*--- log2_kernel() ---------------------------------------------------------+
  |   Base 2 logarithm by a polynomial approximation.                         |
  |   log2(x+1)                                                               |
  +---------------------------------------------------------------------------*/
-static void log2_kernel(FPU_REG const *arg, u_char argsign, Xsig *accum_result,
+static void log2_kernel(FPU_REG const *arg, u_char argsign, Xsig * accum_result,
 			long int *expon)
 {
-  long int             exponent, adj;
-  unsigned long long   Xsq;
-  Xsig                 accumulator, Numer, Denom, argSignif, arg_signif;
-
-  exponent = exponent16(arg);
-  Numer.lsw = Denom.lsw = 0;
-  XSIG_LL(Numer) = XSIG_LL(Denom) = significand(arg);
-  if ( argsign == SIGN_POS )
-    {
-      shr_Xsig(&Denom, 2 - (1 + exponent));
-      Denom.msw |= 0x80000000;
-      div_Xsig(&Numer, &Denom, &argSignif);
-    }
-  else
-    {
-      shr_Xsig(&Denom, 1 - (1 + exponent));
-      negate_Xsig(&Denom);
-      if ( Denom.msw & 0x80000000 )
-	{
-	  div_Xsig(&Numer, &Denom, &argSignif);
-	  exponent ++;
-	}
-      else
-	{
-	  /* Denom must be 1.0 */
-	  argSignif.lsw = Numer.lsw; argSignif.midw = Numer.midw;
-	  argSignif.msw = Numer.msw;
+	long int exponent, adj;
+	unsigned long long Xsq;
+	Xsig accumulator, Numer, Denom, argSignif, arg_signif;
+
+	exponent = exponent16(arg);
+	Numer.lsw = Denom.lsw = 0;
+	XSIG_LL(Numer) = XSIG_LL(Denom) = significand(arg);
+	if (argsign == SIGN_POS) {
+		shr_Xsig(&Denom, 2 - (1 + exponent));
+		Denom.msw |= 0x80000000;
+		div_Xsig(&Numer, &Denom, &argSignif);
+	} else {
+		shr_Xsig(&Denom, 1 - (1 + exponent));
+		negate_Xsig(&Denom);
+		if (Denom.msw & 0x80000000) {
+			div_Xsig(&Numer, &Denom, &argSignif);
+			exponent++;
+		} else {
+			/* Denom must be 1.0 */
+			argSignif.lsw = Numer.lsw;
+			argSignif.midw = Numer.midw;
+			argSignif.msw = Numer.msw;
+		}
 	}
-    }
 
 #ifndef PECULIAR_486
-  /* Should check here that  |local_arg|  is within the valid range */
-  if ( exponent >= -2 )
-    {
-      if ( (exponent > -2) ||
-	  (argSignif.msw > (unsigned)0xafb0ccc0) )
-	{
-	  /* The argument is too large */
+	/* Should check here that  |local_arg|  is within the valid range */
+	if (exponent >= -2) {
+		if ((exponent > -2) || (argSignif.msw > (unsigned)0xafb0ccc0)) {
+			/* The argument is too large */
+		}
 	}
-    }
 #endif /* PECULIAR_486 */
 
-  arg_signif.lsw = argSignif.lsw; XSIG_LL(arg_signif) = XSIG_LL(argSignif);
-  adj = norm_Xsig(&argSignif);
-  accumulator.lsw = argSignif.lsw; XSIG_LL(accumulator) = XSIG_LL(argSignif);
-  mul_Xsig_Xsig(&accumulator, &accumulator);
-  shr_Xsig(&accumulator, 2*(-1 - (1 + exponent + adj)));
-  Xsq = XSIG_LL(accumulator);
-  if ( accumulator.lsw & 0x80000000 )
-    Xsq++;
-
-  accumulator.msw = accumulator.midw = accumulator.lsw = 0;
-  /* Do the basic fixed point polynomial evaluation */
-  polynomial_Xsig(&accumulator, &Xsq, logterms, HIPOWER-1);
-
-  mul_Xsig_Xsig(&accumulator, &argSignif);
-  shr_Xsig(&accumulator, 6 - adj);
-
-  mul32_Xsig(&arg_signif, leadterm);
-  add_two_Xsig(&accumulator, &arg_signif, &exponent);
-
-  *expon = exponent + 1;
-  accum_result->lsw = accumulator.lsw;
-  accum_result->midw = accumulator.midw;
-  accum_result->msw = accumulator.msw;
+	arg_signif.lsw = argSignif.lsw;
+	XSIG_LL(arg_signif) = XSIG_LL(argSignif);
+	adj = norm_Xsig(&argSignif);
+	accumulator.lsw = argSignif.lsw;
+	XSIG_LL(accumulator) = XSIG_LL(argSignif);
+	mul_Xsig_Xsig(&accumulator, &accumulator);
+	shr_Xsig(&accumulator, 2 * (-1 - (1 + exponent + adj)));
+	Xsq = XSIG_LL(accumulator);
+	if (accumulator.lsw & 0x80000000)
+		Xsq++;
+
+	accumulator.msw = accumulator.midw = accumulator.lsw = 0;
+	/* Do the basic fixed point polynomial evaluation */
+	polynomial_Xsig(&accumulator, &Xsq, logterms, HIPOWER - 1);
+
+	mul_Xsig_Xsig(&accumulator, &argSignif);
+	shr_Xsig(&accumulator, 6 - adj);
+
+	mul32_Xsig(&arg_signif, leadterm);
+	add_two_Xsig(&accumulator, &arg_signif, &exponent);
+
+	*expon = exponent + 1;
+	accum_result->lsw = accumulator.lsw;
+	accum_result->midw = accumulator.midw;
+	accum_result->msw = accumulator.msw;
 
 }

arch/x86/math-emu/poly_sin.c

@@ -11,7 +11,6 @@
  |                                                                           |
  +---------------------------------------------------------------------------*/
 
-
 #include "exception.h"
 #include "reg_constant.h"
 #include "fpu_emu.h"
@@ -19,379 +18,361 @@
 #include "control_w.h"
 #include "poly.h"
 
-
 #define	N_COEFF_P	4
 #define	N_COEFF_N	4
 
-static const unsigned long long pos_terms_l[N_COEFF_P] =
-{
-  0xaaaaaaaaaaaaaaabLL,
-  0x00d00d00d00cf906LL,
-  0x000006b99159a8bbLL,
-  0x000000000d7392e6LL
+static const unsigned long long pos_terms_l[N_COEFF_P] = {
+	0xaaaaaaaaaaaaaaabLL,
+	0x00d00d00d00cf906LL,
+	0x000006b99159a8bbLL,
+	0x000000000d7392e6LL
 };
 
-static const unsigned long long neg_terms_l[N_COEFF_N] =
-{
-  0x2222222222222167LL,
-  0x0002e3bc74aab624LL,
-  0x0000000b09229062LL,
-  0x00000000000c7973LL
+static const unsigned long long neg_terms_l[N_COEFF_N] = {
+	0x2222222222222167LL,
+	0x0002e3bc74aab624LL,
+	0x0000000b09229062LL,
+	0x00000000000c7973LL
 };
 
-
-
 #define	N_COEFF_PH	4
 #define	N_COEFF_NH	4
-static const unsigned long long pos_terms_h[N_COEFF_PH] =
-{
-  0x0000000000000000LL,
-  0x05b05b05b05b0406LL,
-  0x000049f93edd91a9LL,
-  0x00000000c9c9ed62LL
+static const unsigned long long pos_terms_h[N_COEFF_PH] = {
+	0x0000000000000000LL,
+	0x05b05b05b05b0406LL,
+	0x000049f93edd91a9LL,
+	0x00000000c9c9ed62LL
 };
 
-static const unsigned long long neg_terms_h[N_COEFF_NH] =
-{
-  0xaaaaaaaaaaaaaa98LL,
-  0x001a01a01a019064LL,
-  0x0000008f76c68a77LL,
-  0x0000000000d58f5eLL
+static const unsigned long long neg_terms_h[N_COEFF_NH] = {
+	0xaaaaaaaaaaaaaa98LL,
+	0x001a01a01a019064LL,
+	0x0000008f76c68a77LL,
+	0x0000000000d58f5eLL
 };
 
-
 /*--- poly_sine() -----------------------------------------------------------+
  |                                                                           |
  +---------------------------------------------------------------------------*/
-void	poly_sine(FPU_REG *st0_ptr)
+void poly_sine(FPU_REG * st0_ptr)
 {
-  int                 exponent, echange;
-  Xsig                accumulator, argSqrd, argTo4;
-  unsigned long       fix_up, adj;
-  unsigned long long  fixed_arg;
-  FPU_REG	      result;
+	int exponent, echange;
+	Xsig accumulator, argSqrd, argTo4;
+	unsigned long fix_up, adj;
+	unsigned long long fixed_arg;
+	FPU_REG result;
 
-  exponent = exponent(st0_ptr);
+	exponent = exponent(st0_ptr);
 
-  accumulator.lsw = accumulator.midw = accumulator.msw = 0;
+	accumulator.lsw = accumulator.midw = accumulator.msw = 0;
 
-  /* Split into two ranges, for arguments below and above 1.0 */
-  /* The boundary between upper and lower is approx 0.88309101259 */
-  if ( (exponent < -1) || ((exponent == -1) && (st0_ptr->sigh <= 0xe21240aa)) )
-    {
-      /* The argument is <= 0.88309101259 */
+	/* Split into two ranges, for arguments below and above 1.0 */
+	/* The boundary between upper and lower is approx 0.88309101259 */
+	if ((exponent < -1)
+	    || ((exponent == -1) && (st0_ptr->sigh <= 0xe21240aa))) {
+		/* The argument is <= 0.88309101259 */
+
+		argSqrd.msw = st0_ptr->sigh;
+		argSqrd.midw = st0_ptr->sigl;
+		argSqrd.lsw = 0;
+		mul64_Xsig(&argSqrd, &significand(st0_ptr));
+		shr_Xsig(&argSqrd, 2 * (-1 - exponent));
+		argTo4.msw = argSqrd.msw;
+		argTo4.midw = argSqrd.midw;
+		argTo4.lsw = argSqrd.lsw;
+		mul_Xsig_Xsig(&argTo4, &argTo4);
 
-      argSqrd.msw = st0_ptr->sigh; argSqrd.midw = st0_ptr->sigl; argSqrd.lsw = 0;
-      mul64_Xsig(&argSqrd, &significand(st0_ptr));
-      shr_Xsig(&argSqrd, 2*(-1-exponent));
-      argTo4.msw = argSqrd.msw; argTo4.midw = argSqrd.midw;
-      argTo4.lsw = argSqrd.lsw;
-      mul_Xsig_Xsig(&argTo4, &argTo4);
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_l,
+				N_COEFF_N - 1);
+		mul_Xsig_Xsig(&accumulator, &argSqrd);
+		negate_Xsig(&accumulator);
 
-      polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_l,
-		      N_COEFF_N-1);
-      mul_Xsig_Xsig(&accumulator, &argSqrd);
-      negate_Xsig(&accumulator);
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_l,
+				N_COEFF_P - 1);
 
-      polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_l,
-		      N_COEFF_P-1);
+		shr_Xsig(&accumulator, 2);	/* Divide by four */
+		accumulator.msw |= 0x80000000;	/* Add 1.0 */
 
-      shr_Xsig(&accumulator, 2);    /* Divide by four */
-      accumulator.msw |= 0x80000000;  /* Add 1.0 */
+		mul64_Xsig(&accumulator, &significand(st0_ptr));
+		mul64_Xsig(&accumulator, &significand(st0_ptr));
+		mul64_Xsig(&accumulator, &significand(st0_ptr));
 
-      mul64_Xsig(&accumulator, &significand(st0_ptr));
-      mul64_Xsig(&accumulator, &significand(st0_ptr));
-      mul64_Xsig(&accumulator, &significand(st0_ptr));
+		/* Divide by four, FPU_REG compatible, etc */
+		exponent = 3 * exponent;
 
-      /* Divide by four, FPU_REG compatible, etc */
-      exponent = 3*exponent;
+		/* The minimum exponent difference is 3 */
+		shr_Xsig(&accumulator, exponent(st0_ptr) - exponent);
 
-      /* The minimum exponent difference is 3 */
-      shr_Xsig(&accumulator, exponent(st0_ptr) - exponent);
+		negate_Xsig(&accumulator);
+		XSIG_LL(accumulator) += significand(st0_ptr);
 
-      negate_Xsig(&accumulator);
-      XSIG_LL(accumulator) += significand(st0_ptr);
+		echange = round_Xsig(&accumulator);
 
-      echange = round_Xsig(&accumulator);
+		setexponentpos(&result, exponent(st0_ptr) + echange);
+	} else {
+		/* The argument is > 0.88309101259 */
+		/* We use sin(st(0)) = cos(pi/2-st(0)) */
 
-      setexponentpos(&result, exponent(st0_ptr) + echange);
-    }
-  else
-    {
-      /* The argument is > 0.88309101259 */
-      /* We use sin(st(0)) = cos(pi/2-st(0)) */
+		fixed_arg = significand(st0_ptr);
 
-      fixed_arg = significand(st0_ptr);
+		if (exponent == 0) {
+			/* The argument is >= 1.0 */
 
-      if ( exponent == 0 )
-	{
-	  /* The argument is >= 1.0 */
+			/* Put the binary point at the left. */
+			fixed_arg <<= 1;
+		}
+		/* pi/2 in hex is: 1.921fb54442d18469 898CC51701B839A2 52049C1 */
+		fixed_arg = 0x921fb54442d18469LL - fixed_arg;
+		/* There is a special case which arises due to rounding, to fix here. */
+		if (fixed_arg == 0xffffffffffffffffLL)
+			fixed_arg = 0;
 
-	  /* Put the binary point at the left. */
-	  fixed_arg <<= 1;
-	}
-      /* pi/2 in hex is: 1.921fb54442d18469 898CC51701B839A2 52049C1 */
-      fixed_arg = 0x921fb54442d18469LL - fixed_arg;
-      /* There is a special case which arises due to rounding, to fix here. */
-      if ( fixed_arg == 0xffffffffffffffffLL )
-	fixed_arg = 0;
+		XSIG_LL(argSqrd) = fixed_arg;
+		argSqrd.lsw = 0;
+		mul64_Xsig(&argSqrd, &fixed_arg);
 
-      XSIG_LL(argSqrd) = fixed_arg; argSqrd.lsw = 0;
-      mul64_Xsig(&argSqrd, &fixed_arg);
+		XSIG_LL(argTo4) = XSIG_LL(argSqrd);
+		argTo4.lsw = argSqrd.lsw;
+		mul_Xsig_Xsig(&argTo4, &argTo4);
 
-      XSIG_LL(argTo4) = XSIG_LL(argSqrd); argTo4.lsw = argSqrd.lsw;
-      mul_Xsig_Xsig(&argTo4, &argTo4);
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_h,
+				N_COEFF_NH - 1);
+		mul_Xsig_Xsig(&accumulator, &argSqrd);
+		negate_Xsig(&accumulator);
 
-      polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_h,
-		      N_COEFF_NH-1);
-      mul_Xsig_Xsig(&accumulator, &argSqrd);
-      negate_Xsig(&accumulator);
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_h,
+				N_COEFF_PH - 1);
+		negate_Xsig(&accumulator);
 
-      polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_h,
-		      N_COEFF_PH-1);
-      negate_Xsig(&accumulator);
+		mul64_Xsig(&accumulator, &fixed_arg);
+		mul64_Xsig(&accumulator, &fixed_arg);
 
-      mul64_Xsig(&accumulator, &fixed_arg);
-      mul64_Xsig(&accumulator, &fixed_arg);
+		shr_Xsig(&accumulator, 3);
+		negate_Xsig(&accumulator);
 
-      shr_Xsig(&accumulator, 3);
-      negate_Xsig(&accumulator);
+		add_Xsig_Xsig(&accumulator, &argSqrd);
 
-      add_Xsig_Xsig(&accumulator, &argSqrd);
+		shr_Xsig(&accumulator, 1);
 
-      shr_Xsig(&accumulator, 1);
+		accumulator.lsw |= 1;	/* A zero accumulator here would cause problems */
+		negate_Xsig(&accumulator);
 
-      accumulator.lsw |= 1;  /* A zero accumulator here would cause problems */
-      negate_Xsig(&accumulator);
+		/* The basic computation is complete. Now fix the answer to
+		   compensate for the error due to the approximation used for
+		   pi/2
+		 */
 
-      /* The basic computation is complete. Now fix the answer to
-	 compensate for the error due to the approximation used for
-	 pi/2
-	 */
+		/* This has an exponent of -65 */
+		fix_up = 0x898cc517;
+		/* The fix-up needs to be improved for larger args */
+		if (argSqrd.msw & 0xffc00000) {
+			/* Get about 32 bit precision in these: */
+			fix_up -= mul_32_32(0x898cc517, argSqrd.msw) / 6;
+		}
+		fix_up = mul_32_32(fix_up, LL_MSW(fixed_arg));
 
-      /* This has an exponent of -65 */
-      fix_up = 0x898cc517;
-      /* The fix-up needs to be improved for larger args */
-      if ( argSqrd.msw & 0xffc00000 )
-	{
-	  /* Get about 32 bit precision in these: */
-	  fix_up -= mul_32_32(0x898cc517, argSqrd.msw) / 6;
-	}
-      fix_up = mul_32_32(fix_up, LL_MSW(fixed_arg));
+		adj = accumulator.lsw;	/* temp save */
+		accumulator.lsw -= fix_up;
+		if (accumulator.lsw > adj)
+			XSIG_LL(accumulator)--;
 
-      adj = accumulator.lsw;    /* temp save */
-      accumulator.lsw -= fix_up;
-      if ( accumulator.lsw > adj )
-	XSIG_LL(accumulator) --;
+		echange = round_Xsig(&accumulator);
 
-      echange = round_Xsig(&accumulator);
-
-      setexponentpos(&result, echange - 1);
-    }
+		setexponentpos(&result, echange - 1);
+	}
 
-  significand(&result) = XSIG_LL(accumulator);
-  setsign(&result, getsign(st0_ptr));
-  FPU_copy_to_reg0(&result, TAG_Valid);
+	significand(&result) = XSIG_LL(accumulator);
+	setsign(&result, getsign(st0_ptr));
+	FPU_copy_to_reg0(&result, TAG_Valid);
 
 #ifdef PARANOID
-  if ( (exponent(&result) >= 0)
-      && (significand(&result) > 0x8000000000000000LL) )
-    {
-      EXCEPTION(EX_INTERNAL|0x150);
-    }
+	if ((exponent(&result) >= 0)
+	    && (significand(&result) > 0x8000000000000000LL)) {
+		EXCEPTION(EX_INTERNAL | 0x150);
+	}
 #endif /* PARANOID */
 
 }
 
-
-
 /*--- poly_cos() ------------------------------------------------------------+
  |                                                                           |
  +---------------------------------------------------------------------------*/
-void	poly_cos(FPU_REG *st0_ptr)
+void poly_cos(FPU_REG * st0_ptr)
 {
-  FPU_REG	      result;
-  long int            exponent, exp2, echange;
-  Xsig                accumulator, argSqrd, fix_up, argTo4;
-  unsigned long long  fixed_arg;
+	FPU_REG result;
+	long int exponent, exp2, echange;
+	Xsig accumulator, argSqrd, fix_up, argTo4;
+	unsigned long long fixed_arg;
 
 #ifdef PARANOID
-  if ( (exponent(st0_ptr) > 0)
-      || ((exponent(st0_ptr) == 0)
-	  && (significand(st0_ptr) > 0xc90fdaa22168c234LL)) )
-    {
-      EXCEPTION(EX_Invalid);
-      FPU_copy_to_reg0(&CONST_QNaN, TAG_Special);
-      return;
-    }
-#endif /* PARANOID */
-
-  exponent = exponent(st0_ptr);
-
-  accumulator.lsw = accumulator.midw = accumulator.msw = 0;
-
-  if ( (exponent < -1) || ((exponent == -1) && (st0_ptr->sigh <= 0xb00d6f54)) )
-    {
-      /* arg is < 0.687705 */
-
-      argSqrd.msw = st0_ptr->sigh; argSqrd.midw = st0_ptr->sigl;
-      argSqrd.lsw = 0;
-      mul64_Xsig(&argSqrd, &significand(st0_ptr));
-
-      if ( exponent < -1 )
-	{
-	  /* shift the argument right by the required places */
-	  shr_Xsig(&argSqrd, 2*(-1-exponent));
-	}
-
-      argTo4.msw = argSqrd.msw; argTo4.midw = argSqrd.midw;
-      argTo4.lsw = argSqrd.lsw;
-      mul_Xsig_Xsig(&argTo4, &argTo4);
-
-      polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_h,
-		      N_COEFF_NH-1);
-      mul_Xsig_Xsig(&accumulator, &argSqrd);
-      negate_Xsig(&accumulator);
-
-      polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_h,
-		      N_COEFF_PH-1);
-      negate_Xsig(&accumulator);
-
-      mul64_Xsig(&accumulator, &significand(st0_ptr));
-      mul64_Xsig(&accumulator, &significand(st0_ptr));
-      shr_Xsig(&accumulator, -2*(1+exponent));
-
-      shr_Xsig(&accumulator, 3);
-      negate_Xsig(&accumulator);
-
-      add_Xsig_Xsig(&accumulator, &argSqrd);
-
-      shr_Xsig(&accumulator, 1);
-
-      /* It doesn't matter if accumulator is all zero here, the
-	 following code will work ok */
-      negate_Xsig(&accumulator);
-
-      if ( accumulator.lsw & 0x80000000 )
-	XSIG_LL(accumulator) ++;
-      if ( accumulator.msw == 0 )
-	{
-	  /* The result is 1.0 */
-	  FPU_copy_to_reg0(&CONST_1, TAG_Valid);
-	  return;
-	}
-      else
-	{
-	  significand(&result) = XSIG_LL(accumulator);
-      
-	  /* will be a valid positive nr with expon = -1 */
-	  setexponentpos(&result, -1);
-	}
-    }
-  else
-    {
-      fixed_arg = significand(st0_ptr);
-
-      if ( exponent == 0 )
-	{
-	  /* The argument is >= 1.0 */
-
-	  /* Put the binary point at the left. */
-	  fixed_arg <<= 1;
-	}
-      /* pi/2 in hex is: 1.921fb54442d18469 898CC51701B839A2 52049C1 */
-      fixed_arg = 0x921fb54442d18469LL - fixed_arg;
-      /* There is a special case which arises due to rounding, to fix here. */
-      if ( fixed_arg == 0xffffffffffffffffLL )
-	fixed_arg = 0;
-
-      exponent = -1;
-      exp2 = -1;
-
-      /* A shift is needed here only for a narrow range of arguments,
-	 i.e. for fixed_arg approx 2^-32, but we pick up more... */
-      if ( !(LL_MSW(fixed_arg) & 0xffff0000) )
-	{
-	  fixed_arg <<= 16;
-	  exponent -= 16;
-	  exp2 -= 16;
+	if ((exponent(st0_ptr) > 0)
+	    || ((exponent(st0_ptr) == 0)
+		&& (significand(st0_ptr) > 0xc90fdaa22168c234LL))) {
+		EXCEPTION(EX_Invalid);
+		FPU_copy_to_reg0(&CONST_QNaN, TAG_Special);
+		return;
 	}
+#endif /* PARANOID */
 
-      XSIG_LL(argSqrd) = fixed_arg; argSqrd.lsw = 0;
-      mul64_Xsig(&argSqrd, &fixed_arg);
-
-      if ( exponent < -1 )
-	{
-	  /* shift the argument right by the required places */
-	  shr_Xsig(&argSqrd, 2*(-1-exponent));
-	}
-
-      argTo4.msw = argSqrd.msw; argTo4.midw = argSqrd.midw;
-      argTo4.lsw = argSqrd.lsw;
-      mul_Xsig_Xsig(&argTo4, &argTo4);
-
-      polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_l,
-		      N_COEFF_N-1);
-      mul_Xsig_Xsig(&accumulator, &argSqrd);
-      negate_Xsig(&accumulator);
-
-      polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_l,
-		      N_COEFF_P-1);
-
-      shr_Xsig(&accumulator, 2);    /* Divide by four */
-      accumulator.msw |= 0x80000000;  /* Add 1.0 */
-
-      mul64_Xsig(&accumulator, &fixed_arg);
-      mul64_Xsig(&accumulator, &fixed_arg);
-      mul64_Xsig(&accumulator, &fixed_arg);
-
-      /* Divide by four, FPU_REG compatible, etc */
-      exponent = 3*exponent;
-
-      /* The minimum exponent difference is 3 */
-      shr_Xsig(&accumulator, exp2 - exponent);
-
-      negate_Xsig(&accumulator);
-      XSIG_LL(accumulator) += fixed_arg;
-
-      /* The basic computation is complete. Now fix the answer to
-	 compensate for the error due to the approximation used for
-	 pi/2
-	 */
-
-      /* This has an exponent of -65 */
-      XSIG_LL(fix_up) = 0x898cc51701b839a2ll;
-      fix_up.lsw = 0;
-
-      /* The fix-up needs to be improved for larger args */
-      if ( argSqrd.msw & 0xffc00000 )
-	{
-	  /* Get about 32 bit precision in these: */
-	  fix_up.msw -= mul_32_32(0x898cc517, argSqrd.msw) / 2;
-	  fix_up.msw += mul_32_32(0x898cc517, argTo4.msw) / 24;
+	exponent = exponent(st0_ptr);
+
+	accumulator.lsw = accumulator.midw = accumulator.msw = 0;
+
+	if ((exponent < -1)
+	    || ((exponent == -1) && (st0_ptr->sigh <= 0xb00d6f54))) {
+		/* arg is < 0.687705 */
+
+		argSqrd.msw = st0_ptr->sigh;
+		argSqrd.midw = st0_ptr->sigl;
+		argSqrd.lsw = 0;
+		mul64_Xsig(&argSqrd, &significand(st0_ptr));
+
+		if (exponent < -1) {
+			/* shift the argument right by the required places */
+			shr_Xsig(&argSqrd, 2 * (-1 - exponent));
+		}
+
+		argTo4.msw = argSqrd.msw;
+		argTo4.midw = argSqrd.midw;
+		argTo4.lsw = argSqrd.lsw;
+		mul_Xsig_Xsig(&argTo4, &argTo4);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_h,
+				N_COEFF_NH - 1);
+		mul_Xsig_Xsig(&accumulator, &argSqrd);
+		negate_Xsig(&accumulator);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_h,
+				N_COEFF_PH - 1);
+		negate_Xsig(&accumulator);
+
+		mul64_Xsig(&accumulator, &significand(st0_ptr));
+		mul64_Xsig(&accumulator, &significand(st0_ptr));
+		shr_Xsig(&accumulator, -2 * (1 + exponent));
+
+		shr_Xsig(&accumulator, 3);
+		negate_Xsig(&accumulator);
+
+		add_Xsig_Xsig(&accumulator, &argSqrd);
+
+		shr_Xsig(&accumulator, 1);
+
+		/* It doesn't matter if accumulator is all zero here, the
+		   following code will work ok */
+		negate_Xsig(&accumulator);
+
+		if (accumulator.lsw & 0x80000000)
+			XSIG_LL(accumulator)++;
+		if (accumulator.msw == 0) {
+			/* The result is 1.0 */
+			FPU_copy_to_reg0(&CONST_1, TAG_Valid);
+			return;
+		} else {
+			significand(&result) = XSIG_LL(accumulator);
+
+			/* will be a valid positive nr with expon = -1 */
+			setexponentpos(&result, -1);
+		}
+	} else {
+		fixed_arg = significand(st0_ptr);
+
+		if (exponent == 0) {
+			/* The argument is >= 1.0 */
+
+			/* Put the binary point at the left. */
+			fixed_arg <<= 1;
+		}
+		/* pi/2 in hex is: 1.921fb54442d18469 898CC51701B839A2 52049C1 */
+		fixed_arg = 0x921fb54442d18469LL - fixed_arg;
+		/* There is a special case which arises due to rounding, to fix here. */
+		if (fixed_arg == 0xffffffffffffffffLL)
+			fixed_arg = 0;
+
+		exponent = -1;
+		exp2 = -1;
+
+		/* A shift is needed here only for a narrow range of arguments,
+		   i.e. for fixed_arg approx 2^-32, but we pick up more... */
+		if (!(LL_MSW(fixed_arg) & 0xffff0000)) {
+			fixed_arg <<= 16;
+			exponent -= 16;
+			exp2 -= 16;
+		}
+
+		XSIG_LL(argSqrd) = fixed_arg;
+		argSqrd.lsw = 0;
+		mul64_Xsig(&argSqrd, &fixed_arg);
+
+		if (exponent < -1) {
+			/* shift the argument right by the required places */
+			shr_Xsig(&argSqrd, 2 * (-1 - exponent));
+		}
+
+		argTo4.msw = argSqrd.msw;
+		argTo4.midw = argSqrd.midw;
+		argTo4.lsw = argSqrd.lsw;
+		mul_Xsig_Xsig(&argTo4, &argTo4);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_l,
+				N_COEFF_N - 1);
+		mul_Xsig_Xsig(&accumulator, &argSqrd);
+		negate_Xsig(&accumulator);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_l,
+				N_COEFF_P - 1);
+
+		shr_Xsig(&accumulator, 2);	/* Divide by four */
+		accumulator.msw |= 0x80000000;	/* Add 1.0 */
+
+		mul64_Xsig(&accumulator, &fixed_arg);
+		mul64_Xsig(&accumulator, &fixed_arg);
+		mul64_Xsig(&accumulator, &fixed_arg);
+
+		/* Divide by four, FPU_REG compatible, etc */
+		exponent = 3 * exponent;
+
+		/* The minimum exponent difference is 3 */
+		shr_Xsig(&accumulator, exp2 - exponent);
+
+		negate_Xsig(&accumulator);
+		XSIG_LL(accumulator) += fixed_arg;
+
+		/* The basic computation is complete. Now fix the answer to
+		   compensate for the error due to the approximation used for
+		   pi/2
+		 */
+
+		/* This has an exponent of -65 */
+		XSIG_LL(fix_up) = 0x898cc51701b839a2ll;
+		fix_up.lsw = 0;
+
+		/* The fix-up needs to be improved for larger args */
+		if (argSqrd.msw & 0xffc00000) {
+			/* Get about 32 bit precision in these: */
+			fix_up.msw -= mul_32_32(0x898cc517, argSqrd.msw) / 2;
+			fix_up.msw += mul_32_32(0x898cc517, argTo4.msw) / 24;
+		}
+
+		exp2 += norm_Xsig(&accumulator);
+		shr_Xsig(&accumulator, 1);	/* Prevent overflow */
+		exp2++;
+		shr_Xsig(&fix_up, 65 + exp2);
+
+		add_Xsig_Xsig(&accumulator, &fix_up);
+
+		echange = round_Xsig(&accumulator);
+
+		setexponentpos(&result, exp2 + echange);
+		significand(&result) = XSIG_LL(accumulator);
 	}
 
-      exp2 += norm_Xsig(&accumulator);
-      shr_Xsig(&accumulator, 1); /* Prevent overflow */
-      exp2++;
-      shr_Xsig(&fix_up, 65 + exp2);
-
-      add_Xsig_Xsig(&accumulator, &fix_up);
-
-      echange = round_Xsig(&accumulator);
-
-      setexponentpos(&result, exp2 + echange);
-      significand(&result) = XSIG_LL(accumulator);
-    }
-
-  FPU_copy_to_reg0(&result, TAG_Valid);
+	FPU_copy_to_reg0(&result, TAG_Valid);
 
 #ifdef PARANOID
-  if ( (exponent(&result) >= 0)
-      && (significand(&result) > 0x8000000000000000LL) )
-    {
-      EXCEPTION(EX_INTERNAL|0x151);
-    }
+	if ((exponent(&result) >= 0)
+	    && (significand(&result) > 0x8000000000000000LL)) {
+		EXCEPTION(EX_INTERNAL | 0x151);
+	}
 #endif /* PARANOID */
 
 }

arch/x86/math-emu/poly_tan.c

@@ -17,206 +17,196 @@
 #include "control_w.h"
 #include "poly.h"
 
-
 #define	HiPOWERop	3	/* odd poly, positive terms */
-static const unsigned long long oddplterm[HiPOWERop] =
-{
-  0x0000000000000000LL,
-  0x0051a1cf08fca228LL,
-  0x0000000071284ff7LL
+static const unsigned long long oddplterm[HiPOWERop] = {
+	0x0000000000000000LL,
+	0x0051a1cf08fca228LL,
+	0x0000000071284ff7LL
 };
 
 #define	HiPOWERon	2	/* odd poly, negative terms */
-static const unsigned long long oddnegterm[HiPOWERon] =
-{
-   0x1291a9a184244e80LL,
-   0x0000583245819c21LL
+static const unsigned long long oddnegterm[HiPOWERon] = {
+	0x1291a9a184244e80LL,
+	0x0000583245819c21LL
 };
 
 #define	HiPOWERep	2	/* even poly, positive terms */
-static const unsigned long long evenplterm[HiPOWERep] =
-{
-  0x0e848884b539e888LL,
-  0x00003c7f18b887daLL
+static const unsigned long long evenplterm[HiPOWERep] = {
+	0x0e848884b539e888LL,
+	0x00003c7f18b887daLL
 };
 
 #define	HiPOWERen	2	/* even poly, negative terms */
-static const unsigned long long evennegterm[HiPOWERen] =
-{
-  0xf1f0200fd51569ccLL,
-  0x003afb46105c4432LL
+static const unsigned long long evennegterm[HiPOWERen] = {
+	0xf1f0200fd51569ccLL,
+	0x003afb46105c4432LL
 };
 
 static const unsigned long long twothirds = 0xaaaaaaaaaaaaaaabLL;
 
-
 /*--- poly_tan() ------------------------------------------------------------+
  |                                                                           |
  +---------------------------------------------------------------------------*/
-void	poly_tan(FPU_REG *st0_ptr)
+void poly_tan(FPU_REG * st0_ptr)
 {
-  long int    		exponent;
-  int                   invert;
-  Xsig                  argSq, argSqSq, accumulatoro, accumulatore, accum,
-                        argSignif, fix_up;
-  unsigned long         adj;
+	long int exponent;
+	int invert;
+	Xsig argSq, argSqSq, accumulatoro, accumulatore, accum,
+	    argSignif, fix_up;
+	unsigned long adj;
 
-  exponent = exponent(st0_ptr);
+	exponent = exponent(st0_ptr);
 
 #ifdef PARANOID
-  if ( signnegative(st0_ptr) )	/* Can't hack a number < 0.0 */
-    { arith_invalid(0); return; }  /* Need a positive number */
+	if (signnegative(st0_ptr)) {	/* Can't hack a number < 0.0 */
+		arith_invalid(0);
+		return;
+	}			/* Need a positive number */
 #endif /* PARANOID */
 
-  /* Split the problem into two domains, smaller and larger than pi/4 */
-  if ( (exponent == 0) || ((exponent == -1) && (st0_ptr->sigh > 0xc90fdaa2)) )
-    {
-      /* The argument is greater than (approx) pi/4 */
-      invert = 1;
-      accum.lsw = 0;
-      XSIG_LL(accum) = significand(st0_ptr);
- 
-      if ( exponent == 0 )
-	{
-	  /* The argument is >= 1.0 */
-	  /* Put the binary point at the left. */
-	  XSIG_LL(accum) <<= 1;
-	}
-      /* pi/2 in hex is: 1.921fb54442d18469 898CC51701B839A2 52049C1 */
-      XSIG_LL(accum) = 0x921fb54442d18469LL - XSIG_LL(accum);
-      /* This is a special case which arises due to rounding. */
-      if ( XSIG_LL(accum) == 0xffffffffffffffffLL )
-	{
-	  FPU_settag0(TAG_Valid);
-	  significand(st0_ptr) = 0x8a51e04daabda360LL;
-	  setexponent16(st0_ptr, (0x41 + EXTENDED_Ebias) | SIGN_Negative);
-	  return;
+	/* Split the problem into two domains, smaller and larger than pi/4 */
+	if ((exponent == 0)
+	    || ((exponent == -1) && (st0_ptr->sigh > 0xc90fdaa2))) {
+		/* The argument is greater than (approx) pi/4 */
+		invert = 1;
+		accum.lsw = 0;
+		XSIG_LL(accum) = significand(st0_ptr);
+
+		if (exponent == 0) {
+			/* The argument is >= 1.0 */
+			/* Put the binary point at the left. */
+			XSIG_LL(accum) <<= 1;
+		}
+		/* pi/2 in hex is: 1.921fb54442d18469 898CC51701B839A2 52049C1 */
+		XSIG_LL(accum) = 0x921fb54442d18469LL - XSIG_LL(accum);
+		/* This is a special case which arises due to rounding. */
+		if (XSIG_LL(accum) == 0xffffffffffffffffLL) {
+			FPU_settag0(TAG_Valid);
+			significand(st0_ptr) = 0x8a51e04daabda360LL;
+			setexponent16(st0_ptr,
+				      (0x41 + EXTENDED_Ebias) | SIGN_Negative);
+			return;
+		}
+
+		argSignif.lsw = accum.lsw;
+		XSIG_LL(argSignif) = XSIG_LL(accum);
+		exponent = -1 + norm_Xsig(&argSignif);
+	} else {
+		invert = 0;
+		argSignif.lsw = 0;
+		XSIG_LL(accum) = XSIG_LL(argSignif) = significand(st0_ptr);
+
+		if (exponent < -1) {
+			/* shift the argument right by the required places */
+			if (FPU_shrx(&XSIG_LL(accum), -1 - exponent) >=
+			    0x80000000U)
+				XSIG_LL(accum)++;	/* round up */
+		}
 	}
 
-      argSignif.lsw = accum.lsw;
-      XSIG_LL(argSignif) = XSIG_LL(accum);
-      exponent = -1 + norm_Xsig(&argSignif);
-    }
-  else
-    {
-      invert = 0;
-      argSignif.lsw = 0;
-      XSIG_LL(accum) = XSIG_LL(argSignif) = significand(st0_ptr);
- 
-      if ( exponent < -1 )
-	{
-	  /* shift the argument right by the required places */
-	  if ( FPU_shrx(&XSIG_LL(accum), -1-exponent) >= 0x80000000U )
-	    XSIG_LL(accum) ++;	/* round up */
-	}
-    }
-
-  XSIG_LL(argSq) = XSIG_LL(accum); argSq.lsw = accum.lsw;
-  mul_Xsig_Xsig(&argSq, &argSq);
-  XSIG_LL(argSqSq) = XSIG_LL(argSq); argSqSq.lsw = argSq.lsw;
-  mul_Xsig_Xsig(&argSqSq, &argSqSq);
-
-  /* Compute the negative terms for the numerator polynomial */
-  accumulatoro.msw = accumulatoro.midw = accumulatoro.lsw = 0;
-  polynomial_Xsig(&accumulatoro, &XSIG_LL(argSqSq), oddnegterm, HiPOWERon-1);
-  mul_Xsig_Xsig(&accumulatoro, &argSq);
-  negate_Xsig(&accumulatoro);
-  /* Add the positive terms */
-  polynomial_Xsig(&accumulatoro, &XSIG_LL(argSqSq), oddplterm, HiPOWERop-1);
-
-  
-  /* Compute the positive terms for the denominator polynomial */
-  accumulatore.msw = accumulatore.midw = accumulatore.lsw = 0;
-  polynomial_Xsig(&accumulatore, &XSIG_LL(argSqSq), evenplterm, HiPOWERep-1);
-  mul_Xsig_Xsig(&accumulatore, &argSq);
-  negate_Xsig(&accumulatore);
-  /* Add the negative terms */
-  polynomial_Xsig(&accumulatore, &XSIG_LL(argSqSq), evennegterm, HiPOWERen-1);
-  /* Multiply by arg^2 */
-  mul64_Xsig(&accumulatore, &XSIG_LL(argSignif));
-  mul64_Xsig(&accumulatore, &XSIG_LL(argSignif));
-  /* de-normalize and divide by 2 */
-  shr_Xsig(&accumulatore, -2*(1+exponent) + 1);
-  negate_Xsig(&accumulatore);      /* This does 1 - accumulator */
-
-  /* Now find the ratio. */
-  if ( accumulatore.msw == 0 )
-    {
-      /* accumulatoro must contain 1.0 here, (actually, 0) but it
-	 really doesn't matter what value we use because it will
-	 have negligible effect in later calculations
-	 */
-      XSIG_LL(accum) = 0x8000000000000000LL;
-      accum.lsw = 0;
-    }
-  else
-    {
-      div_Xsig(&accumulatoro, &accumulatore, &accum);
-    }
-
-  /* Multiply by 1/3 * arg^3 */
-  mul64_Xsig(&accum, &XSIG_LL(argSignif));
-  mul64_Xsig(&accum, &XSIG_LL(argSignif));
-  mul64_Xsig(&accum, &XSIG_LL(argSignif));
-  mul64_Xsig(&accum, &twothirds);
-  shr_Xsig(&accum, -2*(exponent+1));
-
-  /* tan(arg) = arg + accum */
-  add_two_Xsig(&accum, &argSignif, &exponent);
-
-  if ( invert )
-    {
-      /* We now have the value of tan(pi_2 - arg) where pi_2 is an
-	 approximation for pi/2
-	 */
-      /* The next step is to fix the answer to compensate for the
-	 error due to the approximation used for pi/2
-	 */
-
-      /* This is (approx) delta, the error in our approx for pi/2
-	 (see above). It has an exponent of -65
-	 */
-      XSIG_LL(fix_up) = 0x898cc51701b839a2LL;
-      fix_up.lsw = 0;
-
-      if ( exponent == 0 )
-	adj = 0xffffffff;   /* We want approx 1.0 here, but
-			       this is close enough. */
-      else if ( exponent > -30 )
-	{
-	  adj = accum.msw >> -(exponent+1);      /* tan */
-	  adj = mul_32_32(adj, adj);             /* tan^2 */
+	XSIG_LL(argSq) = XSIG_LL(accum);
+	argSq.lsw = accum.lsw;
+	mul_Xsig_Xsig(&argSq, &argSq);
+	XSIG_LL(argSqSq) = XSIG_LL(argSq);
+	argSqSq.lsw = argSq.lsw;
+	mul_Xsig_Xsig(&argSqSq, &argSqSq);
+
+	/* Compute the negative terms for the numerator polynomial */
+	accumulatoro.msw = accumulatoro.midw = accumulatoro.lsw = 0;
+	polynomial_Xsig(&accumulatoro, &XSIG_LL(argSqSq), oddnegterm,
+			HiPOWERon - 1);
+	mul_Xsig_Xsig(&accumulatoro, &argSq);
+	negate_Xsig(&accumulatoro);
+	/* Add the positive terms */
+	polynomial_Xsig(&accumulatoro, &XSIG_LL(argSqSq), oddplterm,
+			HiPOWERop - 1);
+
+	/* Compute the positive terms for the denominator polynomial */
+	accumulatore.msw = accumulatore.midw = accumulatore.lsw = 0;
+	polynomial_Xsig(&accumulatore, &XSIG_LL(argSqSq), evenplterm,
+			HiPOWERep - 1);
+	mul_Xsig_Xsig(&accumulatore, &argSq);
+	negate_Xsig(&accumulatore);
+	/* Add the negative terms */
+	polynomial_Xsig(&accumulatore, &XSIG_LL(argSqSq), evennegterm,
+			HiPOWERen - 1);
+	/* Multiply by arg^2 */
+	mul64_Xsig(&accumulatore, &XSIG_LL(argSignif));
+	mul64_Xsig(&accumulatore, &XSIG_LL(argSignif));
+	/* de-normalize and divide by 2 */
+	shr_Xsig(&accumulatore, -2 * (1 + exponent) + 1);
+	negate_Xsig(&accumulatore);	/* This does 1 - accumulator */
+
+	/* Now find the ratio. */
+	if (accumulatore.msw == 0) {
+		/* accumulatoro must contain 1.0 here, (actually, 0) but it
+		   really doesn't matter what value we use because it will
+		   have negligible effect in later calculations
+		 */
+		XSIG_LL(accum) = 0x8000000000000000LL;
+		accum.lsw = 0;
+	} else {
+		div_Xsig(&accumulatoro, &accumulatore, &accum);
 	}
-      else
-	adj = 0;
-      adj = mul_32_32(0x898cc517, adj);          /* delta * tan^2 */
-
-      fix_up.msw += adj;
-      if ( !(fix_up.msw & 0x80000000) )   /* did fix_up overflow ? */
-	{
-	  /* Yes, we need to add an msb */
-	  shr_Xsig(&fix_up, 1);
-	  fix_up.msw |= 0x80000000;
-	  shr_Xsig(&fix_up, 64 + exponent);
+
+	/* Multiply by 1/3 * arg^3 */
+	mul64_Xsig(&accum, &XSIG_LL(argSignif));
+	mul64_Xsig(&accum, &XSIG_LL(argSignif));
+	mul64_Xsig(&accum, &XSIG_LL(argSignif));
+	mul64_Xsig(&accum, &twothirds);
+	shr_Xsig(&accum, -2 * (exponent + 1));
+
+	/* tan(arg) = arg + accum */
+	add_two_Xsig(&accum, &argSignif, &exponent);
+
+	if (invert) {
+		/* We now have the value of tan(pi_2 - arg) where pi_2 is an
+		   approximation for pi/2
+		 */
+		/* The next step is to fix the answer to compensate for the
+		   error due to the approximation used for pi/2
+		 */
+
+		/* This is (approx) delta, the error in our approx for pi/2
+		   (see above). It has an exponent of -65
+		 */
+		XSIG_LL(fix_up) = 0x898cc51701b839a2LL;
+		fix_up.lsw = 0;
+
+		if (exponent == 0)
+			adj = 0xffffffff;	/* We want approx 1.0 here, but
+						   this is close enough. */
+		else if (exponent > -30) {
+			adj = accum.msw >> -(exponent + 1);	/* tan */
+			adj = mul_32_32(adj, adj);	/* tan^2 */
+		} else
+			adj = 0;
+		adj = mul_32_32(0x898cc517, adj);	/* delta * tan^2 */
+
+		fix_up.msw += adj;
+		if (!(fix_up.msw & 0x80000000)) {	/* did fix_up overflow ? */
+			/* Yes, we need to add an msb */
+			shr_Xsig(&fix_up, 1);
+			fix_up.msw |= 0x80000000;
+			shr_Xsig(&fix_up, 64 + exponent);
+		} else
+			shr_Xsig(&fix_up, 65 + exponent);
+
+		add_two_Xsig(&accum, &fix_up, &exponent);
+
+		/* accum now contains tan(pi/2 - arg).
+		   Use tan(arg) = 1.0 / tan(pi/2 - arg)
+		 */
+		accumulatoro.lsw = accumulatoro.midw = 0;
+		accumulatoro.msw = 0x80000000;
+		div_Xsig(&accumulatoro, &accum, &accum);
+		exponent = -exponent - 1;
 	}
-      else
-	shr_Xsig(&fix_up, 65 + exponent);
-
-      add_two_Xsig(&accum, &fix_up, &exponent);
-
-      /* accum now contains tan(pi/2 - arg).
-	 Use tan(arg) = 1.0 / tan(pi/2 - arg)
-	 */
-      accumulatoro.lsw = accumulatoro.midw = 0;
-      accumulatoro.msw = 0x80000000;
-      div_Xsig(&accumulatoro, &accum, &accum);
-      exponent = - exponent - 1;
-    }
-
-  /* Transfer the result */
-  round_Xsig(&accum);
-  FPU_settag0(TAG_Valid);
-  significand(st0_ptr) = XSIG_LL(accum);
-  setexponent16(st0_ptr, exponent + EXTENDED_Ebias);  /* Result is positive. */
+
+	/* Transfer the result */
+	round_Xsig(&accum);
+	FPU_settag0(TAG_Valid);
+	significand(st0_ptr) = XSIG_LL(accum);
+	setexponent16(st0_ptr, exponent + EXTENDED_Ebias);	/* Result is positive. */
 
 }

arch/x86/math-emu/reg_add_sub.c

@@ -27,7 +27,7 @@
 static
 int add_sub_specials(FPU_REG const *a, u_char taga, u_char signa,
 		     FPU_REG const *b, u_char tagb, u_char signb,
-		     FPU_REG *dest, int deststnr, int control_w);
+		     FPU_REG * dest, int deststnr, int control_w);
 
 /*
   Operates on st(0) and st(n), or on st(0) and temporary data.
@@ -35,340 +35,299 @@ int add_sub_specials(FPU_REG const *a, u_char taga, u_char signa,
   */
 int FPU_add(FPU_REG const *b, u_char tagb, int deststnr, int control_w)
 {
-  FPU_REG *a = &st(0);
-  FPU_REG *dest = &st(deststnr);
-  u_char signb = getsign(b);
-  u_char taga = FPU_gettag0();
-  u_char signa = getsign(a);
-  u_char saved_sign = getsign(dest);
-  int diff, tag, expa, expb;
-  
-  if ( !(taga | tagb) )
-    {
-      expa = exponent(a);
-      expb = exponent(b);
-
-    valid_add:
-      /* Both registers are valid */
-      if (!(signa ^ signb))
-	{
-	  /* signs are the same */
-	  tag = FPU_u_add(a, b, dest, control_w, signa, expa, expb);
-	}
-      else
-	{
-	  /* The signs are different, so do a subtraction */
-	  diff = expa - expb;
-	  if (!diff)
-	    {
-	      diff = a->sigh - b->sigh;  /* This works only if the ms bits
-					    are identical. */
-	      if (!diff)
-		{
-		  diff = a->sigl > b->sigl;
-		  if (!diff)
-		    diff = -(a->sigl < b->sigl);
+	FPU_REG *a = &st(0);
+	FPU_REG *dest = &st(deststnr);
+	u_char signb = getsign(b);
+	u_char taga = FPU_gettag0();
+	u_char signa = getsign(a);
+	u_char saved_sign = getsign(dest);
+	int diff, tag, expa, expb;
+
+	if (!(taga | tagb)) {
+		expa = exponent(a);
+		expb = exponent(b);
+
+	      valid_add:
+		/* Both registers are valid */
+		if (!(signa ^ signb)) {
+			/* signs are the same */
+			tag =
+			    FPU_u_add(a, b, dest, control_w, signa, expa, expb);
+		} else {
+			/* The signs are different, so do a subtraction */
+			diff = expa - expb;
+			if (!diff) {
+				diff = a->sigh - b->sigh;	/* This works only if the ms bits
+								   are identical. */
+				if (!diff) {
+					diff = a->sigl > b->sigl;
+					if (!diff)
+						diff = -(a->sigl < b->sigl);
+				}
+			}
+
+			if (diff > 0) {
+				tag =
+				    FPU_u_sub(a, b, dest, control_w, signa,
+					      expa, expb);
+			} else if (diff < 0) {
+				tag =
+				    FPU_u_sub(b, a, dest, control_w, signb,
+					      expb, expa);
+			} else {
+				FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
+				/* sign depends upon rounding mode */
+				setsign(dest, ((control_w & CW_RC) != RC_DOWN)
+					? SIGN_POS : SIGN_NEG);
+				return TAG_Zero;
+			}
 		}
-	    }
-      
-	  if (diff > 0)
-	    {
-	      tag = FPU_u_sub(a, b, dest, control_w, signa, expa, expb);
-	    }
-	  else if ( diff < 0 )
-	    {
-	      tag = FPU_u_sub(b, a, dest, control_w, signb, expb, expa);
-	    }
-	  else
-	    {
-	      FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
-	      /* sign depends upon rounding mode */
-	      setsign(dest, ((control_w & CW_RC) != RC_DOWN)
-		      ? SIGN_POS : SIGN_NEG);
-	      return TAG_Zero;
-	    }
-	}
 
-      if ( tag < 0 )
-	{
-	  setsign(dest, saved_sign);
-	  return tag;
+		if (tag < 0) {
+			setsign(dest, saved_sign);
+			return tag;
+		}
+		FPU_settagi(deststnr, tag);
+		return tag;
 	}
-      FPU_settagi(deststnr, tag);
-      return tag;
-    }
 
-  if ( taga == TAG_Special )
-    taga = FPU_Special(a);
-  if ( tagb == TAG_Special )
-    tagb = FPU_Special(b);
+	if (taga == TAG_Special)
+		taga = FPU_Special(a);
+	if (tagb == TAG_Special)
+		tagb = FPU_Special(b);
 
-  if ( ((taga == TAG_Valid) && (tagb == TW_Denormal))
+	if (((taga == TAG_Valid) && (tagb == TW_Denormal))
 	    || ((taga == TW_Denormal) && (tagb == TAG_Valid))
-	    || ((taga == TW_Denormal) && (tagb == TW_Denormal)) )
-    {
-      FPU_REG x, y;
+	    || ((taga == TW_Denormal) && (tagb == TW_Denormal))) {
+		FPU_REG x, y;
+
+		if (denormal_operand() < 0)
+			return FPU_Exception;
+
+		FPU_to_exp16(a, &x);
+		FPU_to_exp16(b, &y);
+		a = &x;
+		b = &y;
+		expa = exponent16(a);
+		expb = exponent16(b);
+		goto valid_add;
+	}
 
-      if ( denormal_operand() < 0 )
-	return FPU_Exception;
+	if ((taga == TW_NaN) || (tagb == TW_NaN)) {
+		if (deststnr == 0)
+			return real_2op_NaN(b, tagb, deststnr, a);
+		else
+			return real_2op_NaN(a, taga, deststnr, a);
+	}
 
-      FPU_to_exp16(a, &x);
-      FPU_to_exp16(b, &y);
-      a = &x;
-      b = &y;
-      expa = exponent16(a);
-      expb = exponent16(b);
-      goto valid_add;
-    }
-
-  if ( (taga == TW_NaN) || (tagb == TW_NaN) )
-    {
-      if ( deststnr == 0 )
-	return real_2op_NaN(b, tagb, deststnr, a);
-      else
-	return real_2op_NaN(a, taga, deststnr, a);
-    }
-
-  return add_sub_specials(a, taga, signa, b, tagb, signb,
-			  dest, deststnr, control_w);
+	return add_sub_specials(a, taga, signa, b, tagb, signb,
+				dest, deststnr, control_w);
 }
 
-
 /* Subtract b from a.  (a-b) -> dest */
 int FPU_sub(int flags, int rm, int control_w)
 {
-  FPU_REG const *a, *b;
-  FPU_REG *dest;
-  u_char taga, tagb, signa, signb, saved_sign, sign;
-  int diff, tag = 0, expa, expb, deststnr;
-
-  a = &st(0);
-  taga = FPU_gettag0();
-
-  deststnr = 0;
-  if ( flags & LOADED )
-    {
-      b = (FPU_REG *)rm;
-      tagb = flags & 0x0f;
-    }
-  else
-    {
-      b = &st(rm);
-      tagb = FPU_gettagi(rm);
-
-      if ( flags & DEST_RM )
-	deststnr = rm;
-    }
-
-  signa = getsign(a);
-  signb = getsign(b);
-
-  if ( flags & REV )
-    {
-      signa ^= SIGN_NEG;
-      signb ^= SIGN_NEG;
-    }
-
-  dest = &st(deststnr);
-  saved_sign = getsign(dest);
-
-  if ( !(taga | tagb) )
-    {
-      expa = exponent(a);
-      expb = exponent(b);
-
-    valid_subtract:
-      /* Both registers are valid */
-
-      diff = expa - expb;
-
-      if (!diff)
-	{
-	  diff = a->sigh - b->sigh;  /* Works only if ms bits are identical */
-	  if (!diff)
-	    {
-	      diff = a->sigl > b->sigl;
-	      if (!diff)
-		diff = -(a->sigl < b->sigl);
-	    }
+	FPU_REG const *a, *b;
+	FPU_REG *dest;
+	u_char taga, tagb, signa, signb, saved_sign, sign;
+	int diff, tag = 0, expa, expb, deststnr;
+
+	a = &st(0);
+	taga = FPU_gettag0();
+
+	deststnr = 0;
+	if (flags & LOADED) {
+		b = (FPU_REG *) rm;
+		tagb = flags & 0x0f;
+	} else {
+		b = &st(rm);
+		tagb = FPU_gettagi(rm);
+
+		if (flags & DEST_RM)
+			deststnr = rm;
 	}
 
-      switch ( (((int)signa)*2 + signb) / SIGN_NEG )
-	{
-	case 0: /* P - P */
-	case 3: /* N - N */
-	  if (diff > 0)
-	    {
-	      /* |a| > |b| */
-	      tag = FPU_u_sub(a, b, dest, control_w, signa, expa, expb);
-	    }
-	  else if ( diff == 0 )
-	    {
-	      FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
-
-	      /* sign depends upon rounding mode */
-	      setsign(dest, ((control_w & CW_RC) != RC_DOWN)
-		? SIGN_POS : SIGN_NEG);
-	      return TAG_Zero;
-	    }
-	  else
-	    {
-	      sign = signa ^ SIGN_NEG;
-	      tag = FPU_u_sub(b, a, dest, control_w, sign, expb, expa);
-	    }
-	  break;
-	case 1: /* P - N */
-	  tag = FPU_u_add(a, b, dest, control_w, SIGN_POS, expa, expb);
-	  break;
-	case 2: /* N - P */
-	  tag = FPU_u_add(a, b, dest, control_w, SIGN_NEG, expa, expb);
-	  break;
+	signa = getsign(a);
+	signb = getsign(b);
+
+	if (flags & REV) {
+		signa ^= SIGN_NEG;
+		signb ^= SIGN_NEG;
+	}
+
+	dest = &st(deststnr);
+	saved_sign = getsign(dest);
+
+	if (!(taga | tagb)) {
+		expa = exponent(a);
+		expb = exponent(b);
+
+	      valid_subtract:
+		/* Both registers are valid */
+
+		diff = expa - expb;
+
+		if (!diff) {
+			diff = a->sigh - b->sigh;	/* Works only if ms bits are identical */
+			if (!diff) {
+				diff = a->sigl > b->sigl;
+				if (!diff)
+					diff = -(a->sigl < b->sigl);
+			}
+		}
+
+		switch ((((int)signa) * 2 + signb) / SIGN_NEG) {
+		case 0:	/* P - P */
+		case 3:	/* N - N */
+			if (diff > 0) {
+				/* |a| > |b| */
+				tag =
+				    FPU_u_sub(a, b, dest, control_w, signa,
+					      expa, expb);
+			} else if (diff == 0) {
+				FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
+
+				/* sign depends upon rounding mode */
+				setsign(dest, ((control_w & CW_RC) != RC_DOWN)
+					? SIGN_POS : SIGN_NEG);
+				return TAG_Zero;
+			} else {
+				sign = signa ^ SIGN_NEG;
+				tag =
+				    FPU_u_sub(b, a, dest, control_w, sign, expb,
+					      expa);
+			}
+			break;
+		case 1:	/* P - N */
+			tag =
+			    FPU_u_add(a, b, dest, control_w, SIGN_POS, expa,
+				      expb);
+			break;
+		case 2:	/* N - P */
+			tag =
+			    FPU_u_add(a, b, dest, control_w, SIGN_NEG, expa,
+				      expb);
+			break;
 #ifdef PARANOID
-	default:
-	  EXCEPTION(EX_INTERNAL|0x111);
-	  return -1;
+		default:
+			EXCEPTION(EX_INTERNAL | 0x111);
+			return -1;
 #endif
+		}
+		if (tag < 0) {
+			setsign(dest, saved_sign);
+			return tag;
+		}
+		FPU_settagi(deststnr, tag);
+		return tag;
 	}
-      if ( tag < 0 )
-	{
-	  setsign(dest, saved_sign);
-	  return tag;
-	}
-      FPU_settagi(deststnr, tag);
-      return tag;
-    }
 
-  if ( taga == TAG_Special )
-    taga = FPU_Special(a);
-  if ( tagb == TAG_Special )
-    tagb = FPU_Special(b);
+	if (taga == TAG_Special)
+		taga = FPU_Special(a);
+	if (tagb == TAG_Special)
+		tagb = FPU_Special(b);
 
-  if ( ((taga == TAG_Valid) && (tagb == TW_Denormal))
+	if (((taga == TAG_Valid) && (tagb == TW_Denormal))
 	    || ((taga == TW_Denormal) && (tagb == TAG_Valid))
-	    || ((taga == TW_Denormal) && (tagb == TW_Denormal)) )
-    {
-      FPU_REG x, y;
+	    || ((taga == TW_Denormal) && (tagb == TW_Denormal))) {
+		FPU_REG x, y;
 
-      if ( denormal_operand() < 0 )
-	return FPU_Exception;
+		if (denormal_operand() < 0)
+			return FPU_Exception;
+
+		FPU_to_exp16(a, &x);
+		FPU_to_exp16(b, &y);
+		a = &x;
+		b = &y;
+		expa = exponent16(a);
+		expb = exponent16(b);
 
-      FPU_to_exp16(a, &x);
-      FPU_to_exp16(b, &y);
-      a = &x;
-      b = &y;
-      expa = exponent16(a);
-      expb = exponent16(b);
-
-      goto valid_subtract;
-    }
-
-  if ( (taga == TW_NaN) || (tagb == TW_NaN) )
-    {
-      FPU_REG const *d1, *d2;
-      if ( flags & REV )
-	{
-	  d1 = b;
-	  d2 = a;
+		goto valid_subtract;
 	}
-      else
-	{
-	  d1 = a;
-	  d2 = b;
+
+	if ((taga == TW_NaN) || (tagb == TW_NaN)) {
+		FPU_REG const *d1, *d2;
+		if (flags & REV) {
+			d1 = b;
+			d2 = a;
+		} else {
+			d1 = a;
+			d2 = b;
+		}
+		if (flags & LOADED)
+			return real_2op_NaN(b, tagb, deststnr, d1);
+		if (flags & DEST_RM)
+			return real_2op_NaN(a, taga, deststnr, d2);
+		else
+			return real_2op_NaN(b, tagb, deststnr, d2);
 	}
-      if ( flags & LOADED )
-	return real_2op_NaN(b, tagb, deststnr, d1);
-      if ( flags & DEST_RM )
-	return real_2op_NaN(a, taga, deststnr, d2);
-      else
-	return real_2op_NaN(b, tagb, deststnr, d2);
-    }
-
-    return add_sub_specials(a, taga, signa, b, tagb, signb ^ SIGN_NEG,
-			    dest, deststnr, control_w);
-}
 
+	return add_sub_specials(a, taga, signa, b, tagb, signb ^ SIGN_NEG,
+				dest, deststnr, control_w);
+}
 
 static
 int add_sub_specials(FPU_REG const *a, u_char taga, u_char signa,
 		     FPU_REG const *b, u_char tagb, u_char signb,
-		     FPU_REG *dest, int deststnr, int control_w)
+		     FPU_REG * dest, int deststnr, int control_w)
 {
-  if ( ((taga == TW_Denormal) || (tagb == TW_Denormal))
-       && (denormal_operand() < 0) )
-    return FPU_Exception;
-
-  if (taga == TAG_Zero)
-    {
-      if (tagb == TAG_Zero)
-	{
-	  /* Both are zero, result will be zero. */
-	  u_char different_signs = signa ^ signb;
-
-	  FPU_copy_to_regi(a, TAG_Zero, deststnr);
-	  if ( different_signs )
-	    {
-	      /* Signs are different. */
-	      /* Sign of answer depends upon rounding mode. */
-	      setsign(dest, ((control_w & CW_RC) != RC_DOWN)
-		      ? SIGN_POS : SIGN_NEG);
-	    }
-	  else
-	    setsign(dest, signa);  /* signa may differ from the sign of a. */
-	  return TAG_Zero;
-	}
-      else
-	{
-	  reg_copy(b, dest);
-	  if ( (tagb == TW_Denormal) && (b->sigh & 0x80000000) )
-	    {
-	      /* A pseudoDenormal, convert it. */
-	      addexponent(dest, 1);
-	      tagb = TAG_Valid;
-	    }
-	  else if ( tagb > TAG_Empty )
-	    tagb = TAG_Special;
-	  setsign(dest, signb);  /* signb may differ from the sign of b. */
-	  FPU_settagi(deststnr, tagb);
-	  return tagb;
-	}
-    }
-  else if (tagb == TAG_Zero)
-    {
-      reg_copy(a, dest);
-      if ( (taga == TW_Denormal) && (a->sigh & 0x80000000) )
-	{
-	  /* A pseudoDenormal */
-	  addexponent(dest, 1);
-	  taga = TAG_Valid;
-	}
-      else if ( taga > TAG_Empty )
-	taga = TAG_Special;
-      setsign(dest, signa);  /* signa may differ from the sign of a. */
-      FPU_settagi(deststnr, taga);
-      return taga;
-    }
-  else if (taga == TW_Infinity)
-    {
-      if ( (tagb != TW_Infinity) || (signa == signb) )
-	{
-	  FPU_copy_to_regi(a, TAG_Special, deststnr);
-	  setsign(dest, signa);  /* signa may differ from the sign of a. */
-	  return taga;
+	if (((taga == TW_Denormal) || (tagb == TW_Denormal))
+	    && (denormal_operand() < 0))
+		return FPU_Exception;
+
+	if (taga == TAG_Zero) {
+		if (tagb == TAG_Zero) {
+			/* Both are zero, result will be zero. */
+			u_char different_signs = signa ^ signb;
+
+			FPU_copy_to_regi(a, TAG_Zero, deststnr);
+			if (different_signs) {
+				/* Signs are different. */
+				/* Sign of answer depends upon rounding mode. */
+				setsign(dest, ((control_w & CW_RC) != RC_DOWN)
+					? SIGN_POS : SIGN_NEG);
+			} else
+				setsign(dest, signa);	/* signa may differ from the sign of a. */
+			return TAG_Zero;
+		} else {
+			reg_copy(b, dest);
+			if ((tagb == TW_Denormal) && (b->sigh & 0x80000000)) {
+				/* A pseudoDenormal, convert it. */
+				addexponent(dest, 1);
+				tagb = TAG_Valid;
+			} else if (tagb > TAG_Empty)
+				tagb = TAG_Special;
+			setsign(dest, signb);	/* signb may differ from the sign of b. */
+			FPU_settagi(deststnr, tagb);
+			return tagb;
+		}
+	} else if (tagb == TAG_Zero) {
+		reg_copy(a, dest);
+		if ((taga == TW_Denormal) && (a->sigh & 0x80000000)) {
+			/* A pseudoDenormal */
+			addexponent(dest, 1);
+			taga = TAG_Valid;
+		} else if (taga > TAG_Empty)
+			taga = TAG_Special;
+		setsign(dest, signa);	/* signa may differ from the sign of a. */
+		FPU_settagi(deststnr, taga);
+		return taga;
+	} else if (taga == TW_Infinity) {
+		if ((tagb != TW_Infinity) || (signa == signb)) {
+			FPU_copy_to_regi(a, TAG_Special, deststnr);
+			setsign(dest, signa);	/* signa may differ from the sign of a. */
+			return taga;
+		}
+		/* Infinity-Infinity is undefined. */
+		return arith_invalid(deststnr);
+	} else if (tagb == TW_Infinity) {
+		FPU_copy_to_regi(b, TAG_Special, deststnr);
+		setsign(dest, signb);	/* signb may differ from the sign of b. */
+		return tagb;
 	}
-      /* Infinity-Infinity is undefined. */
-      return arith_invalid(deststnr);
-    }
-  else if (tagb == TW_Infinity)
-    {
-      FPU_copy_to_regi(b, TAG_Special, deststnr);
-      setsign(dest, signb);  /* signb may differ from the sign of b. */
-      return tagb;
-    }
-
 #ifdef PARANOID
-  EXCEPTION(EX_INTERNAL|0x101);
+	EXCEPTION(EX_INTERNAL | 0x101);
 #endif
 
-  return FPU_Exception;
+	return FPU_Exception;
 }
-

arch/x86/math-emu/reg_compare.c

@@ -20,362 +20,331 @@
 #include "control_w.h"
 #include "status_w.h"
 
-
 static int compare(FPU_REG const *b, int tagb)
 {
-  int diff, exp0, expb;
-  u_char	  	st0_tag;
-  FPU_REG  	*st0_ptr;
-  FPU_REG	x, y;
-  u_char		st0_sign, signb = getsign(b);
-
-  st0_ptr = &st(0);
-  st0_tag = FPU_gettag0();
-  st0_sign = getsign(st0_ptr);
-
-  if ( tagb == TAG_Special )
-    tagb = FPU_Special(b);
-  if ( st0_tag == TAG_Special )
-    st0_tag = FPU_Special(st0_ptr);
-
-  if ( ((st0_tag != TAG_Valid) && (st0_tag != TW_Denormal))
-       || ((tagb != TAG_Valid) && (tagb != TW_Denormal)) )
-    {
-      if ( st0_tag == TAG_Zero )
-	{
-	  if ( tagb == TAG_Zero ) return COMP_A_eq_B;
-	  if ( tagb == TAG_Valid )
-	    return ((signb == SIGN_POS) ? COMP_A_lt_B : COMP_A_gt_B);
-	  if ( tagb == TW_Denormal )
-	    return ((signb == SIGN_POS) ? COMP_A_lt_B : COMP_A_gt_B)
-	    | COMP_Denormal;
-	}
-      else if ( tagb == TAG_Zero )
-	{
-	  if ( st0_tag == TAG_Valid )
-	    return ((st0_sign == SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B);
-	  if ( st0_tag == TW_Denormal )
-	    return ((st0_sign == SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B)
-	    | COMP_Denormal;
+	int diff, exp0, expb;
+	u_char st0_tag;
+	FPU_REG *st0_ptr;
+	FPU_REG x, y;
+	u_char st0_sign, signb = getsign(b);
+
+	st0_ptr = &st(0);
+	st0_tag = FPU_gettag0();
+	st0_sign = getsign(st0_ptr);
+
+	if (tagb == TAG_Special)
+		tagb = FPU_Special(b);
+	if (st0_tag == TAG_Special)
+		st0_tag = FPU_Special(st0_ptr);
+
+	if (((st0_tag != TAG_Valid) && (st0_tag != TW_Denormal))
+	    || ((tagb != TAG_Valid) && (tagb != TW_Denormal))) {
+		if (st0_tag == TAG_Zero) {
+			if (tagb == TAG_Zero)
+				return COMP_A_eq_B;
+			if (tagb == TAG_Valid)
+				return ((signb ==
+					 SIGN_POS) ? COMP_A_lt_B : COMP_A_gt_B);
+			if (tagb == TW_Denormal)
+				return ((signb ==
+					 SIGN_POS) ? COMP_A_lt_B : COMP_A_gt_B)
+				    | COMP_Denormal;
+		} else if (tagb == TAG_Zero) {
+			if (st0_tag == TAG_Valid)
+				return ((st0_sign ==
+					 SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B);
+			if (st0_tag == TW_Denormal)
+				return ((st0_sign ==
+					 SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B)
+				    | COMP_Denormal;
+		}
+
+		if (st0_tag == TW_Infinity) {
+			if ((tagb == TAG_Valid) || (tagb == TAG_Zero))
+				return ((st0_sign ==
+					 SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B);
+			else if (tagb == TW_Denormal)
+				return ((st0_sign ==
+					 SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B)
+				    | COMP_Denormal;
+			else if (tagb == TW_Infinity) {
+				/* The 80486 book says that infinities can be equal! */
+				return (st0_sign == signb) ? COMP_A_eq_B :
+				    ((st0_sign ==
+				      SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B);
+			}
+			/* Fall through to the NaN code */
+		} else if (tagb == TW_Infinity) {
+			if ((st0_tag == TAG_Valid) || (st0_tag == TAG_Zero))
+				return ((signb ==
+					 SIGN_POS) ? COMP_A_lt_B : COMP_A_gt_B);
+			if (st0_tag == TW_Denormal)
+				return ((signb ==
+					 SIGN_POS) ? COMP_A_lt_B : COMP_A_gt_B)
+				    | COMP_Denormal;
+			/* Fall through to the NaN code */
+		}
+
+		/* The only possibility now should be that one of the arguments
+		   is a NaN */
+		if ((st0_tag == TW_NaN) || (tagb == TW_NaN)) {
+			int signalling = 0, unsupported = 0;
+			if (st0_tag == TW_NaN) {
+				signalling =
+				    (st0_ptr->sigh & 0xc0000000) == 0x80000000;
+				unsupported = !((exponent(st0_ptr) == EXP_OVER)
+						&& (st0_ptr->
+						    sigh & 0x80000000));
+			}
+			if (tagb == TW_NaN) {
+				signalling |=
+				    (b->sigh & 0xc0000000) == 0x80000000;
+				unsupported |= !((exponent(b) == EXP_OVER)
+						 && (b->sigh & 0x80000000));
+			}
+			if (signalling || unsupported)
+				return COMP_No_Comp | COMP_SNaN | COMP_NaN;
+			else
+				/* Neither is a signaling NaN */
+				return COMP_No_Comp | COMP_NaN;
+		}
+
+		EXCEPTION(EX_Invalid);
 	}
 
-      if ( st0_tag == TW_Infinity )
-	{
-	  if ( (tagb == TAG_Valid) || (tagb == TAG_Zero) )
-	    return ((st0_sign == SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B);
-	  else if ( tagb == TW_Denormal )
-	    return ((st0_sign == SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B)
-	      | COMP_Denormal;
-	  else if ( tagb == TW_Infinity )
-	    {
-	      /* The 80486 book says that infinities can be equal! */
-	      return (st0_sign == signb) ? COMP_A_eq_B :
-		((st0_sign == SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B);
-	    }
-	  /* Fall through to the NaN code */
-	}
-      else if ( tagb == TW_Infinity )
-	{
-	  if ( (st0_tag == TAG_Valid) || (st0_tag == TAG_Zero) )
-	    return ((signb == SIGN_POS) ? COMP_A_lt_B : COMP_A_gt_B);
-	  if ( st0_tag == TW_Denormal )
-	    return ((signb == SIGN_POS) ? COMP_A_lt_B : COMP_A_gt_B)
-		| COMP_Denormal;
-	  /* Fall through to the NaN code */
+	if (st0_sign != signb) {
+		return ((st0_sign == SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B)
+		    | (((st0_tag == TW_Denormal) || (tagb == TW_Denormal)) ?
+		       COMP_Denormal : 0);
 	}
 
-      /* The only possibility now should be that one of the arguments
-	 is a NaN */
-      if ( (st0_tag == TW_NaN) || (tagb == TW_NaN) )
-	{
-	  int signalling = 0, unsupported = 0;
-	  if ( st0_tag == TW_NaN )
-	    {
-	      signalling = (st0_ptr->sigh & 0xc0000000) == 0x80000000;
-	      unsupported = !((exponent(st0_ptr) == EXP_OVER)
-			      && (st0_ptr->sigh & 0x80000000));
-	    }
-	  if ( tagb == TW_NaN )
-	    {
-	      signalling |= (b->sigh & 0xc0000000) == 0x80000000;
-	      unsupported |= !((exponent(b) == EXP_OVER)
-			       && (b->sigh & 0x80000000));
-	    }
-	  if ( signalling || unsupported )
-	    return COMP_No_Comp | COMP_SNaN | COMP_NaN;
-	  else
-	    /* Neither is a signaling NaN */
-	    return COMP_No_Comp | COMP_NaN;
+	if ((st0_tag == TW_Denormal) || (tagb == TW_Denormal)) {
+		FPU_to_exp16(st0_ptr, &x);
+		FPU_to_exp16(b, &y);
+		st0_ptr = &x;
+		b = &y;
+		exp0 = exponent16(st0_ptr);
+		expb = exponent16(b);
+	} else {
+		exp0 = exponent(st0_ptr);
+		expb = exponent(b);
 	}
-      
-      EXCEPTION(EX_Invalid);
-    }
-  
-  if (st0_sign != signb)
-    {
-      return ((st0_sign == SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B)
-	| ( ((st0_tag == TW_Denormal) || (tagb == TW_Denormal)) ?
-	    COMP_Denormal : 0);
-    }
-
-  if ( (st0_tag == TW_Denormal) || (tagb == TW_Denormal) )
-    {
-      FPU_to_exp16(st0_ptr, &x);
-      FPU_to_exp16(b, &y);
-      st0_ptr = &x;
-      b = &y;
-      exp0 = exponent16(st0_ptr);
-      expb = exponent16(b);
-    }
-  else
-    {
-      exp0 = exponent(st0_ptr);
-      expb = exponent(b);
-    }
 
 #ifdef PARANOID
-  if (!(st0_ptr->sigh & 0x80000000)) EXCEPTION(EX_Invalid);
-  if (!(b->sigh & 0x80000000)) EXCEPTION(EX_Invalid);
+	if (!(st0_ptr->sigh & 0x80000000))
+		EXCEPTION(EX_Invalid);
+	if (!(b->sigh & 0x80000000))
+		EXCEPTION(EX_Invalid);
 #endif /* PARANOID */
 
-  diff = exp0 - expb;
-  if ( diff == 0 )
-    {
-      diff = st0_ptr->sigh - b->sigh;  /* Works only if ms bits are
-					      identical */
-      if ( diff == 0 )
-	{
-	diff = st0_ptr->sigl > b->sigl;
-	if ( diff == 0 )
-	  diff = -(st0_ptr->sigl < b->sigl);
+	diff = exp0 - expb;
+	if (diff == 0) {
+		diff = st0_ptr->sigh - b->sigh;	/* Works only if ms bits are
+						   identical */
+		if (diff == 0) {
+			diff = st0_ptr->sigl > b->sigl;
+			if (diff == 0)
+				diff = -(st0_ptr->sigl < b->sigl);
+		}
 	}
-    }
-
-  if ( diff > 0 )
-    {
-      return ((st0_sign == SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B)
-	| ( ((st0_tag == TW_Denormal) || (tagb == TW_Denormal)) ?
-	    COMP_Denormal : 0);
-    }
-  if ( diff < 0 )
-    {
-      return ((st0_sign == SIGN_POS) ? COMP_A_lt_B : COMP_A_gt_B)
-	| ( ((st0_tag == TW_Denormal) || (tagb == TW_Denormal)) ?
-	    COMP_Denormal : 0);
-    }
-
-  return COMP_A_eq_B
-    | ( ((st0_tag == TW_Denormal) || (tagb == TW_Denormal)) ?
-	COMP_Denormal : 0);
 
-}
+	if (diff > 0) {
+		return ((st0_sign == SIGN_POS) ? COMP_A_gt_B : COMP_A_lt_B)
+		    | (((st0_tag == TW_Denormal) || (tagb == TW_Denormal)) ?
+		       COMP_Denormal : 0);
+	}
+	if (diff < 0) {
+		return ((st0_sign == SIGN_POS) ? COMP_A_lt_B : COMP_A_gt_B)
+		    | (((st0_tag == TW_Denormal) || (tagb == TW_Denormal)) ?
+		       COMP_Denormal : 0);
+	}
 
+	return COMP_A_eq_B
+	    | (((st0_tag == TW_Denormal) || (tagb == TW_Denormal)) ?
+	       COMP_Denormal : 0);
+
+}
 
 /* This function requires that st(0) is not empty */
 int FPU_compare_st_data(FPU_REG const *loaded_data, u_char loaded_tag)
 {
-  int f = 0, c;
-
-  c = compare(loaded_data, loaded_tag);
-
-  if (c & COMP_NaN)
-    {
-      EXCEPTION(EX_Invalid);
-      f = SW_C3 | SW_C2 | SW_C0;
-    }
-  else
-    switch (c & 7)
-      {
-      case COMP_A_lt_B:
-	f = SW_C0;
-	break;
-      case COMP_A_eq_B:
-	f = SW_C3;
-	break;
-      case COMP_A_gt_B:
-	f = 0;
-	break;
-      case COMP_No_Comp:
-	f = SW_C3 | SW_C2 | SW_C0;
-	break;
+	int f = 0, c;
+
+	c = compare(loaded_data, loaded_tag);
+
+	if (c & COMP_NaN) {
+		EXCEPTION(EX_Invalid);
+		f = SW_C3 | SW_C2 | SW_C0;
+	} else
+		switch (c & 7) {
+		case COMP_A_lt_B:
+			f = SW_C0;
+			break;
+		case COMP_A_eq_B:
+			f = SW_C3;
+			break;
+		case COMP_A_gt_B:
+			f = 0;
+			break;
+		case COMP_No_Comp:
+			f = SW_C3 | SW_C2 | SW_C0;
+			break;
 #ifdef PARANOID
-      default:
-	EXCEPTION(EX_INTERNAL|0x121);
-	f = SW_C3 | SW_C2 | SW_C0;
-	break;
+		default:
+			EXCEPTION(EX_INTERNAL | 0x121);
+			f = SW_C3 | SW_C2 | SW_C0;
+			break;
 #endif /* PARANOID */
-      }
-  setcc(f);
-  if (c & COMP_Denormal)
-    {
-      return denormal_operand() < 0;
-    }
-  return 0;
+		}
+	setcc(f);
+	if (c & COMP_Denormal) {
+		return denormal_operand() < 0;
+	}
+	return 0;
 }
 
-
 static int compare_st_st(int nr)
 {
-  int f = 0, c;
-  FPU_REG *st_ptr;
-
-  if ( !NOT_EMPTY(0) || !NOT_EMPTY(nr) )
-    {
-      setcc(SW_C3 | SW_C2 | SW_C0);
-      /* Stack fault */
-      EXCEPTION(EX_StackUnder);
-      return !(control_word & CW_Invalid);
-    }
-
-  st_ptr = &st(nr);
-  c = compare(st_ptr, FPU_gettagi(nr));
-  if (c & COMP_NaN)
-    {
-      setcc(SW_C3 | SW_C2 | SW_C0);
-      EXCEPTION(EX_Invalid);
-      return !(control_word & CW_Invalid);
-    }
-  else
-    switch (c & 7)
-      {
-      case COMP_A_lt_B:
-	f = SW_C0;
-	break;
-      case COMP_A_eq_B:
-	f = SW_C3;
-	break;
-      case COMP_A_gt_B:
-	f = 0;
-	break;
-      case COMP_No_Comp:
-	f = SW_C3 | SW_C2 | SW_C0;
-	break;
+	int f = 0, c;
+	FPU_REG *st_ptr;
+
+	if (!NOT_EMPTY(0) || !NOT_EMPTY(nr)) {
+		setcc(SW_C3 | SW_C2 | SW_C0);
+		/* Stack fault */
+		EXCEPTION(EX_StackUnder);
+		return !(control_word & CW_Invalid);
+	}
+
+	st_ptr = &st(nr);
+	c = compare(st_ptr, FPU_gettagi(nr));
+	if (c & COMP_NaN) {
+		setcc(SW_C3 | SW_C2 | SW_C0);
+		EXCEPTION(EX_Invalid);
+		return !(control_word & CW_Invalid);
+	} else
+		switch (c & 7) {
+		case COMP_A_lt_B:
+			f = SW_C0;
+			break;
+		case COMP_A_eq_B:
+			f = SW_C3;
+			break;
+		case COMP_A_gt_B:
+			f = 0;
+			break;
+		case COMP_No_Comp:
+			f = SW_C3 | SW_C2 | SW_C0;
+			break;
 #ifdef PARANOID
-      default:
-	EXCEPTION(EX_INTERNAL|0x122);
-	f = SW_C3 | SW_C2 | SW_C0;
-	break;
+		default:
+			EXCEPTION(EX_INTERNAL | 0x122);
+			f = SW_C3 | SW_C2 | SW_C0;
+			break;
 #endif /* PARANOID */
-      }
-  setcc(f);
-  if (c & COMP_Denormal)
-    {
-      return denormal_operand() < 0;
-    }
-  return 0;
+		}
+	setcc(f);
+	if (c & COMP_Denormal) {
+		return denormal_operand() < 0;
+	}
+	return 0;
 }
 
-
 static int compare_u_st_st(int nr)
 {
-  int f = 0, c;
-  FPU_REG *st_ptr;
-
-  if ( !NOT_EMPTY(0) || !NOT_EMPTY(nr) )
-    {
-      setcc(SW_C3 | SW_C2 | SW_C0);
-      /* Stack fault */
-      EXCEPTION(EX_StackUnder);
-      return !(control_word & CW_Invalid);
-    }
-
-  st_ptr = &st(nr);
-  c = compare(st_ptr, FPU_gettagi(nr));
-  if (c & COMP_NaN)
-    {
-      setcc(SW_C3 | SW_C2 | SW_C0);
-      if (c & COMP_SNaN)       /* This is the only difference between
-				  un-ordered and ordinary comparisons */
-	{
-	  EXCEPTION(EX_Invalid);
-	  return !(control_word & CW_Invalid);
+	int f = 0, c;
+	FPU_REG *st_ptr;
+
+	if (!NOT_EMPTY(0) || !NOT_EMPTY(nr)) {
+		setcc(SW_C3 | SW_C2 | SW_C0);
+		/* Stack fault */
+		EXCEPTION(EX_StackUnder);
+		return !(control_word & CW_Invalid);
 	}
-      return 0;
-    }
-  else
-    switch (c & 7)
-      {
-      case COMP_A_lt_B:
-	f = SW_C0;
-	break;
-      case COMP_A_eq_B:
-	f = SW_C3;
-	break;
-      case COMP_A_gt_B:
-	f = 0;
-	break;
-      case COMP_No_Comp:
-	f = SW_C3 | SW_C2 | SW_C0;
-	break;
+
+	st_ptr = &st(nr);
+	c = compare(st_ptr, FPU_gettagi(nr));
+	if (c & COMP_NaN) {
+		setcc(SW_C3 | SW_C2 | SW_C0);
+		if (c & COMP_SNaN) {	/* This is the only difference between
+					   un-ordered and ordinary comparisons */
+			EXCEPTION(EX_Invalid);
+			return !(control_word & CW_Invalid);
+		}
+		return 0;
+	} else
+		switch (c & 7) {
+		case COMP_A_lt_B:
+			f = SW_C0;
+			break;
+		case COMP_A_eq_B:
+			f = SW_C3;
+			break;
+		case COMP_A_gt_B:
+			f = 0;
+			break;
+		case COMP_No_Comp:
+			f = SW_C3 | SW_C2 | SW_C0;
+			break;
 #ifdef PARANOID
-      default:
-	EXCEPTION(EX_INTERNAL|0x123);
-	f = SW_C3 | SW_C2 | SW_C0;
-	break;
-#endif /* PARANOID */ 
-      }
-  setcc(f);
-  if (c & COMP_Denormal)
-    {
-      return denormal_operand() < 0;
-    }
-  return 0;
+		default:
+			EXCEPTION(EX_INTERNAL | 0x123);
+			f = SW_C3 | SW_C2 | SW_C0;
+			break;
+#endif /* PARANOID */
+		}
+	setcc(f);
+	if (c & COMP_Denormal) {
+		return denormal_operand() < 0;
+	}
+	return 0;
 }
 
 /*---------------------------------------------------------------------------*/
 
 void fcom_st(void)
 {
-  /* fcom st(i) */
-  compare_st_st(FPU_rm);
+	/* fcom st(i) */
+	compare_st_st(FPU_rm);
 }
 
-
 void fcompst(void)
 {
-  /* fcomp st(i) */
-  if ( !compare_st_st(FPU_rm) )
-    FPU_pop();
+	/* fcomp st(i) */
+	if (!compare_st_st(FPU_rm))
+		FPU_pop();
 }
 
-
 void fcompp(void)
 {
-  /* fcompp */
-  if (FPU_rm != 1)
-    {
-      FPU_illegal();
-      return;
-    }
-  if ( !compare_st_st(1) )
-      poppop();
+	/* fcompp */
+	if (FPU_rm != 1) {
+		FPU_illegal();
+		return;
+	}
+	if (!compare_st_st(1))
+		poppop();
 }
 
-
 void fucom_(void)
 {
-  /* fucom st(i) */
-  compare_u_st_st(FPU_rm);
+	/* fucom st(i) */
+	compare_u_st_st(FPU_rm);
 
 }
 
-
 void fucomp(void)
 {
-  /* fucomp st(i) */
-  if ( !compare_u_st_st(FPU_rm) )
-    FPU_pop();
+	/* fucomp st(i) */
+	if (!compare_u_st_st(FPU_rm))
+		FPU_pop();
 }
 
-
 void fucompp(void)
 {
-  /* fucompp */
-  if (FPU_rm == 1)
-    {
-      if ( !compare_u_st_st(1) )
-	poppop();
-    }
-  else
-    FPU_illegal();
+	/* fucompp */
+	if (FPU_rm == 1) {
+		if (!compare_u_st_st(1))
+			poppop();
+	} else
+		FPU_illegal();
 }

arch/x86/math-emu/reg_constant.c

@@ -16,29 +16,28 @@
 #include "reg_constant.h"
 #include "control_w.h"
 
-
 #define MAKE_REG(s,e,l,h) { l, h, \
                             ((EXTENDED_Ebias+(e)) | ((SIGN_##s != 0)*0x8000)) }
 
-FPU_REG const CONST_1    = MAKE_REG(POS, 0, 0x00000000, 0x80000000);
+FPU_REG const CONST_1 = MAKE_REG(POS, 0, 0x00000000, 0x80000000);
 #if 0
-FPU_REG const CONST_2    = MAKE_REG(POS, 1, 0x00000000, 0x80000000);
+FPU_REG const CONST_2 = MAKE_REG(POS, 1, 0x00000000, 0x80000000);
 FPU_REG const CONST_HALF = MAKE_REG(POS, -1, 0x00000000, 0x80000000);
-#endif  /*  0  */
-static FPU_REG const CONST_L2T  = MAKE_REG(POS, 1, 0xcd1b8afe, 0xd49a784b);
-static FPU_REG const CONST_L2E  = MAKE_REG(POS, 0, 0x5c17f0bc, 0xb8aa3b29);
-FPU_REG const CONST_PI   = MAKE_REG(POS, 1, 0x2168c235, 0xc90fdaa2);
-FPU_REG const CONST_PI2  = MAKE_REG(POS, 0, 0x2168c235, 0xc90fdaa2);
-FPU_REG const CONST_PI4  = MAKE_REG(POS, -1, 0x2168c235, 0xc90fdaa2);
-static FPU_REG const CONST_LG2  = MAKE_REG(POS, -2, 0xfbcff799, 0x9a209a84);
-static FPU_REG const CONST_LN2  = MAKE_REG(POS, -1, 0xd1cf79ac, 0xb17217f7);
+#endif /*  0  */
+static FPU_REG const CONST_L2T = MAKE_REG(POS, 1, 0xcd1b8afe, 0xd49a784b);
+static FPU_REG const CONST_L2E = MAKE_REG(POS, 0, 0x5c17f0bc, 0xb8aa3b29);
+FPU_REG const CONST_PI = MAKE_REG(POS, 1, 0x2168c235, 0xc90fdaa2);
+FPU_REG const CONST_PI2 = MAKE_REG(POS, 0, 0x2168c235, 0xc90fdaa2);
+FPU_REG const CONST_PI4 = MAKE_REG(POS, -1, 0x2168c235, 0xc90fdaa2);
+static FPU_REG const CONST_LG2 = MAKE_REG(POS, -2, 0xfbcff799, 0x9a209a84);
+static FPU_REG const CONST_LN2 = MAKE_REG(POS, -1, 0xd1cf79ac, 0xb17217f7);
 
 /* Extra bits to take pi/2 to more than 128 bits precision. */
 FPU_REG const CONST_PI2extra = MAKE_REG(NEG, -66,
-					 0xfc8f8cbb, 0xece675d1);
+					0xfc8f8cbb, 0xece675d1);
 
 /* Only the sign (and tag) is used in internal zeroes */
-FPU_REG const CONST_Z    = MAKE_REG(POS, EXP_UNDER, 0x0, 0x0);
+FPU_REG const CONST_Z = MAKE_REG(POS, EXP_UNDER, 0x0, 0x0);
 
 /* Only the sign and significand (and tag) are used in internal NaNs */
 /* The 80486 never generates one of these 
@@ -48,24 +47,22 @@ FPU_REG const CONST_SNAN = MAKE_REG(POS, EXP_OVER, 0x00000001, 0x80000000);
 FPU_REG const CONST_QNaN = MAKE_REG(NEG, EXP_OVER, 0x00000000, 0xC0000000);
 
 /* Only the sign (and tag) is used in internal infinities */
-FPU_REG const CONST_INF  = MAKE_REG(POS, EXP_OVER, 0x00000000, 0x80000000);
-
+FPU_REG const CONST_INF = MAKE_REG(POS, EXP_OVER, 0x00000000, 0x80000000);
 
 static void fld_const(FPU_REG const *c, int adj, u_char tag)
 {
-  FPU_REG *st_new_ptr;
-
-  if ( STACK_OVERFLOW )
-    {
-      FPU_stack_overflow();
-      return;
-    }
-  push();
-  reg_copy(c, st_new_ptr);
-  st_new_ptr->sigl += adj;  /* For all our fldxxx constants, we don't need to
-			       borrow or carry. */
-  FPU_settag0(tag);
-  clear_C1();
+	FPU_REG *st_new_ptr;
+
+	if (STACK_OVERFLOW) {
+		FPU_stack_overflow();
+		return;
+	}
+	push();
+	reg_copy(c, st_new_ptr);
+	st_new_ptr->sigl += adj;	/* For all our fldxxx constants, we don't need to
+					   borrow or carry. */
+	FPU_settag0(tag);
+	clear_C1();
 }
 
 /* A fast way to find out whether x is one of RC_DOWN or RC_CHOP
@@ -75,46 +72,46 @@ static void fld_const(FPU_REG const *c, int adj, u_char tag)
 
 static void fld1(int rc)
 {
-  fld_const(&CONST_1, 0, TAG_Valid);
+	fld_const(&CONST_1, 0, TAG_Valid);
 }
 
 static void fldl2t(int rc)
 {
-  fld_const(&CONST_L2T, (rc == RC_UP) ? 1 : 0, TAG_Valid);
+	fld_const(&CONST_L2T, (rc == RC_UP) ? 1 : 0, TAG_Valid);
 }
 
 static void fldl2e(int rc)
 {
-  fld_const(&CONST_L2E, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid);
+	fld_const(&CONST_L2E, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid);
 }
 
 static void fldpi(int rc)
 {
-  fld_const(&CONST_PI, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid);
+	fld_const(&CONST_PI, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid);
 }
 
 static void fldlg2(int rc)
 {
-  fld_const(&CONST_LG2, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid);
+	fld_const(&CONST_LG2, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid);
 }
 
 static void fldln2(int rc)
 {
-  fld_const(&CONST_LN2, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid);
+	fld_const(&CONST_LN2, DOWN_OR_CHOP(rc) ? -1 : 0, TAG_Valid);
 }
 
 static void fldz(int rc)
 {
-  fld_const(&CONST_Z, 0, TAG_Zero);
+	fld_const(&CONST_Z, 0, TAG_Zero);
 }
 
-typedef void (*FUNC_RC)(int);
+typedef void (*FUNC_RC) (int);
 
 static FUNC_RC constants_table[] = {
-  fld1, fldl2t, fldl2e, fldpi, fldlg2, fldln2, fldz, (FUNC_RC)FPU_illegal
+	fld1, fldl2t, fldl2e, fldpi, fldlg2, fldln2, fldz, (FUNC_RC) FPU_illegal
 };
 
 void fconst(void)
 {
-  (constants_table[FPU_rm])(control_word & CW_RC);
+	(constants_table[FPU_rm]) (control_word & CW_RC);
 }

arch/x86/math-emu/reg_convert.c

@@ -13,41 +13,34 @@
 #include "exception.h"
 #include "fpu_emu.h"
 
-
-int FPU_to_exp16(FPU_REG const *a, FPU_REG *x)
+int FPU_to_exp16(FPU_REG const *a, FPU_REG * x)
 {
-  int sign = getsign(a);
-
-  *(long long *)&(x->sigl) = *(const long long *)&(a->sigl);
-
-  /* Set up the exponent as a 16 bit quantity. */
-  setexponent16(x, exponent(a));
-
-  if ( exponent16(x) == EXP_UNDER )
-    {
-      /* The number is a de-normal or pseudodenormal. */
-      /* We only deal with the significand and exponent. */
-
-      if (x->sigh & 0x80000000)
-	{
-	  /* Is a pseudodenormal. */
-	  /* This is non-80486 behaviour because the number
-	     loses its 'denormal' identity. */
-	  addexponent(x, 1);
-	}
-      else
-	{
-	  /* Is a denormal. */
-	  addexponent(x, 1);
-	  FPU_normalize_nuo(x);
+	int sign = getsign(a);
+
+	*(long long *)&(x->sigl) = *(const long long *)&(a->sigl);
+
+	/* Set up the exponent as a 16 bit quantity. */
+	setexponent16(x, exponent(a));
+
+	if (exponent16(x) == EXP_UNDER) {
+		/* The number is a de-normal or pseudodenormal. */
+		/* We only deal with the significand and exponent. */
+
+		if (x->sigh & 0x80000000) {
+			/* Is a pseudodenormal. */
+			/* This is non-80486 behaviour because the number
+			   loses its 'denormal' identity. */
+			addexponent(x, 1);
+		} else {
+			/* Is a denormal. */
+			addexponent(x, 1);
+			FPU_normalize_nuo(x);
+		}
 	}
-    }
 
-  if ( !(x->sigh & 0x80000000) )
-    {
-      EXCEPTION(EX_INTERNAL | 0x180);
-    }
+	if (!(x->sigh & 0x80000000)) {
+		EXCEPTION(EX_INTERNAL | 0x180);
+	}
 
-  return sign;
+	return sign;
 }
-

arch/x86/math-emu/reg_divide.c

@@ -26,182 +26,157 @@
   */
 int FPU_div(int flags, int rm, int control_w)
 {
-  FPU_REG x, y;
-  FPU_REG const *a, *b, *st0_ptr, *st_ptr;
-  FPU_REG *dest;
-  u_char taga, tagb, signa, signb, sign, saved_sign;
-  int tag, deststnr;
-
-  if ( flags & DEST_RM )
-    deststnr = rm;
-  else
-    deststnr = 0;
-
-  if ( flags & REV )
-    {
-      b = &st(0);
-      st0_ptr = b;
-      tagb = FPU_gettag0();
-      if ( flags & LOADED )
-	{
-	  a = (FPU_REG *)rm;
-	  taga = flags & 0x0f;
+	FPU_REG x, y;
+	FPU_REG const *a, *b, *st0_ptr, *st_ptr;
+	FPU_REG *dest;
+	u_char taga, tagb, signa, signb, sign, saved_sign;
+	int tag, deststnr;
+
+	if (flags & DEST_RM)
+		deststnr = rm;
+	else
+		deststnr = 0;
+
+	if (flags & REV) {
+		b = &st(0);
+		st0_ptr = b;
+		tagb = FPU_gettag0();
+		if (flags & LOADED) {
+			a = (FPU_REG *) rm;
+			taga = flags & 0x0f;
+		} else {
+			a = &st(rm);
+			st_ptr = a;
+			taga = FPU_gettagi(rm);
+		}
+	} else {
+		a = &st(0);
+		st0_ptr = a;
+		taga = FPU_gettag0();
+		if (flags & LOADED) {
+			b = (FPU_REG *) rm;
+			tagb = flags & 0x0f;
+		} else {
+			b = &st(rm);
+			st_ptr = b;
+			tagb = FPU_gettagi(rm);
+		}
 	}
-      else
-	{
-	  a = &st(rm);
-	  st_ptr = a;
-	  taga = FPU_gettagi(rm);
-	}
-    }
-  else
-    {
-      a = &st(0);
-      st0_ptr = a;
-      taga = FPU_gettag0();
-      if ( flags & LOADED )
-	{
-	  b = (FPU_REG *)rm;
-	  tagb = flags & 0x0f;
-	}
-      else
-	{
-	  b = &st(rm);
-	  st_ptr = b;
-	  tagb = FPU_gettagi(rm);
-	}
-    }
 
-  signa = getsign(a);
-  signb = getsign(b);
+	signa = getsign(a);
+	signb = getsign(b);
 
-  sign = signa ^ signb;
+	sign = signa ^ signb;
 
-  dest = &st(deststnr);
-  saved_sign = getsign(dest);
+	dest = &st(deststnr);
+	saved_sign = getsign(dest);
 
-  if ( !(taga | tagb) )
-    {
-      /* Both regs Valid, this should be the most common case. */
-      reg_copy(a, &x);
-      reg_copy(b, &y);
-      setpositive(&x);
-      setpositive(&y);
-      tag = FPU_u_div(&x, &y, dest, control_w, sign);
+	if (!(taga | tagb)) {
+		/* Both regs Valid, this should be the most common case. */
+		reg_copy(a, &x);
+		reg_copy(b, &y);
+		setpositive(&x);
+		setpositive(&y);
+		tag = FPU_u_div(&x, &y, dest, control_w, sign);
 
-      if ( tag < 0 )
-	return tag;
+		if (tag < 0)
+			return tag;
 
-      FPU_settagi(deststnr, tag);
-      return tag;
-    }
+		FPU_settagi(deststnr, tag);
+		return tag;
+	}
 
-  if ( taga == TAG_Special )
-    taga = FPU_Special(a);
-  if ( tagb == TAG_Special )
-    tagb = FPU_Special(b);
+	if (taga == TAG_Special)
+		taga = FPU_Special(a);
+	if (tagb == TAG_Special)
+		tagb = FPU_Special(b);
 
-  if ( ((taga == TAG_Valid) && (tagb == TW_Denormal))
+	if (((taga == TAG_Valid) && (tagb == TW_Denormal))
 	    || ((taga == TW_Denormal) && (tagb == TAG_Valid))
-	    || ((taga == TW_Denormal) && (tagb == TW_Denormal)) )
-    {
-      if ( denormal_operand() < 0 )
-	return FPU_Exception;
-
-      FPU_to_exp16(a, &x);
-      FPU_to_exp16(b, &y);
-      tag = FPU_u_div(&x, &y, dest, control_w, sign);
-      if ( tag < 0 )
-	return tag;
-
-      FPU_settagi(deststnr, tag);
-      return tag;
-    }
-  else if ( (taga <= TW_Denormal) && (tagb <= TW_Denormal) )
-    {
-      if ( tagb != TAG_Zero )
-	{
-	  /* Want to find Zero/Valid */
-	  if ( tagb == TW_Denormal )
-	    {
-	      if ( denormal_operand() < 0 )
-		return FPU_Exception;
-	    }
-
-	  /* The result is zero. */
-	  FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
-	  setsign(dest, sign);
-	  return TAG_Zero;
+	    || ((taga == TW_Denormal) && (tagb == TW_Denormal))) {
+		if (denormal_operand() < 0)
+			return FPU_Exception;
+
+		FPU_to_exp16(a, &x);
+		FPU_to_exp16(b, &y);
+		tag = FPU_u_div(&x, &y, dest, control_w, sign);
+		if (tag < 0)
+			return tag;
+
+		FPU_settagi(deststnr, tag);
+		return tag;
+	} else if ((taga <= TW_Denormal) && (tagb <= TW_Denormal)) {
+		if (tagb != TAG_Zero) {
+			/* Want to find Zero/Valid */
+			if (tagb == TW_Denormal) {
+				if (denormal_operand() < 0)
+					return FPU_Exception;
+			}
+
+			/* The result is zero. */
+			FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
+			setsign(dest, sign);
+			return TAG_Zero;
+		}
+		/* We have an exception condition, either 0/0 or Valid/Zero. */
+		if (taga == TAG_Zero) {
+			/* 0/0 */
+			return arith_invalid(deststnr);
+		}
+		/* Valid/Zero */
+		return FPU_divide_by_zero(deststnr, sign);
 	}
-      /* We have an exception condition, either 0/0 or Valid/Zero. */
-      if ( taga == TAG_Zero )
-	{
-	  /* 0/0 */
-	  return arith_invalid(deststnr);
+	/* Must have infinities, NaNs, etc */
+	else if ((taga == TW_NaN) || (tagb == TW_NaN)) {
+		if (flags & LOADED)
+			return real_2op_NaN((FPU_REG *) rm, flags & 0x0f, 0,
+					    st0_ptr);
+
+		if (flags & DEST_RM) {
+			int tag;
+			tag = FPU_gettag0();
+			if (tag == TAG_Special)
+				tag = FPU_Special(st0_ptr);
+			return real_2op_NaN(st0_ptr, tag, rm,
+					    (flags & REV) ? st0_ptr : &st(rm));
+		} else {
+			int tag;
+			tag = FPU_gettagi(rm);
+			if (tag == TAG_Special)
+				tag = FPU_Special(&st(rm));
+			return real_2op_NaN(&st(rm), tag, 0,
+					    (flags & REV) ? st0_ptr : &st(rm));
+		}
+	} else if (taga == TW_Infinity) {
+		if (tagb == TW_Infinity) {
+			/* infinity/infinity */
+			return arith_invalid(deststnr);
+		} else {
+			/* tagb must be Valid or Zero */
+			if ((tagb == TW_Denormal) && (denormal_operand() < 0))
+				return FPU_Exception;
+
+			/* Infinity divided by Zero or Valid does
+			   not raise and exception, but returns Infinity */
+			FPU_copy_to_regi(a, TAG_Special, deststnr);
+			setsign(dest, sign);
+			return taga;
+		}
+	} else if (tagb == TW_Infinity) {
+		if ((taga == TW_Denormal) && (denormal_operand() < 0))
+			return FPU_Exception;
+
+		/* The result is zero. */
+		FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
+		setsign(dest, sign);
+		return TAG_Zero;
 	}
-      /* Valid/Zero */
-      return FPU_divide_by_zero(deststnr, sign);
-    }
-  /* Must have infinities, NaNs, etc */
-  else if ( (taga == TW_NaN) || (tagb == TW_NaN) )
-    {
-      if ( flags & LOADED )
-	return real_2op_NaN((FPU_REG *)rm, flags & 0x0f, 0, st0_ptr);
-
-      if ( flags & DEST_RM )
-	{
-	  int tag;
-	  tag = FPU_gettag0();
-	  if ( tag == TAG_Special )
-	    tag = FPU_Special(st0_ptr);
-	  return real_2op_NaN(st0_ptr, tag, rm, (flags & REV) ? st0_ptr : &st(rm));
-	}
-      else
-	{
-	  int tag;
-	  tag = FPU_gettagi(rm);
-	  if ( tag == TAG_Special )
-	    tag = FPU_Special(&st(rm));
-	  return real_2op_NaN(&st(rm), tag, 0, (flags & REV) ? st0_ptr : &st(rm));
-	}
-    }
-  else if (taga == TW_Infinity)
-    {
-      if (tagb == TW_Infinity)
-	{
-	  /* infinity/infinity */
-	  return arith_invalid(deststnr);
-	}
-      else
-	{
-	  /* tagb must be Valid or Zero */
-	  if ( (tagb == TW_Denormal) && (denormal_operand() < 0) )
-	    return FPU_Exception;
-	  
-	  /* Infinity divided by Zero or Valid does
-	     not raise and exception, but returns Infinity */
-	  FPU_copy_to_regi(a, TAG_Special, deststnr);
-	  setsign(dest, sign);
-	  return taga;
-	}
-    }
-  else if (tagb == TW_Infinity)
-    {
-      if ( (taga == TW_Denormal) && (denormal_operand() < 0) )
-	return FPU_Exception;
-
-      /* The result is zero. */
-      FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
-      setsign(dest, sign);
-      return TAG_Zero;
-    }
 #ifdef PARANOID
-  else
-    {
-      EXCEPTION(EX_INTERNAL|0x102);
-      return FPU_Exception;
-    }
-#endif /* PARANOID */ 
+	else {
+		EXCEPTION(EX_INTERNAL | 0x102);
+		return FPU_Exception;
+	}
+#endif /* PARANOID */
 
 	return 0;
 }

arch/x86/math-emu/reg_mul.c

@@ -20,7 +20,6 @@
 #include "reg_constant.h"
 #include "fpu_system.h"
 
-
 /*
   Multiply two registers to give a register result.
   The sources are st(deststnr) and (b,tagb,signb).
@@ -29,104 +28,88 @@
 /* This routine must be called with non-empty source registers */
 int FPU_mul(FPU_REG const *b, u_char tagb, int deststnr, int control_w)
 {
-  FPU_REG *a = &st(deststnr);
-  FPU_REG *dest = a;
-  u_char taga = FPU_gettagi(deststnr);
-  u_char saved_sign = getsign(dest);
-  u_char sign = (getsign(a) ^ getsign(b));
-  int tag;
-
+	FPU_REG *a = &st(deststnr);
+	FPU_REG *dest = a;
+	u_char taga = FPU_gettagi(deststnr);
+	u_char saved_sign = getsign(dest);
+	u_char sign = (getsign(a) ^ getsign(b));
+	int tag;
 
-  if ( !(taga | tagb) )
-    {
-      /* Both regs Valid, this should be the most common case. */
+	if (!(taga | tagb)) {
+		/* Both regs Valid, this should be the most common case. */
 
-      tag = FPU_u_mul(a, b, dest, control_w, sign, exponent(a) + exponent(b));
-      if ( tag < 0 )
-	{
-	  setsign(dest, saved_sign);
-	  return tag;
+		tag =
+		    FPU_u_mul(a, b, dest, control_w, sign,
+			      exponent(a) + exponent(b));
+		if (tag < 0) {
+			setsign(dest, saved_sign);
+			return tag;
+		}
+		FPU_settagi(deststnr, tag);
+		return tag;
 	}
-      FPU_settagi(deststnr, tag);
-      return tag;
-    }
 
-  if ( taga == TAG_Special )
-    taga = FPU_Special(a);
-  if ( tagb == TAG_Special )
-    tagb = FPU_Special(b);
+	if (taga == TAG_Special)
+		taga = FPU_Special(a);
+	if (tagb == TAG_Special)
+		tagb = FPU_Special(b);
 
-  if ( ((taga == TAG_Valid) && (tagb == TW_Denormal))
+	if (((taga == TAG_Valid) && (tagb == TW_Denormal))
 	    || ((taga == TW_Denormal) && (tagb == TAG_Valid))
-	    || ((taga == TW_Denormal) && (tagb == TW_Denormal)) )
-    {
-      FPU_REG x, y;
-      if ( denormal_operand() < 0 )
-	return FPU_Exception;
-
-      FPU_to_exp16(a, &x);
-      FPU_to_exp16(b, &y);
-      tag = FPU_u_mul(&x, &y, dest, control_w, sign,
-		      exponent16(&x) + exponent16(&y));
-      if ( tag < 0 )
-	{
-	  setsign(dest, saved_sign);
-	  return tag;
-	}
-      FPU_settagi(deststnr, tag);
-      return tag;
-    }
-  else if ( (taga <= TW_Denormal) && (tagb <= TW_Denormal) )
-    {
-      if ( ((tagb == TW_Denormal) || (taga == TW_Denormal))
-	   && (denormal_operand() < 0) )
-	return FPU_Exception;
+	    || ((taga == TW_Denormal) && (tagb == TW_Denormal))) {
+		FPU_REG x, y;
+		if (denormal_operand() < 0)
+			return FPU_Exception;
 
-      /* Must have either both arguments == zero, or
-	 one valid and the other zero.
-	 The result is therefore zero. */
-      FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
-      /* The 80486 book says that the answer is +0, but a real
-	 80486 behaves this way.
-	 IEEE-754 apparently says it should be this way. */
-      setsign(dest, sign);
-      return TAG_Zero;
-    }
-      /* Must have infinities, NaNs, etc */
-  else if ( (taga == TW_NaN) || (tagb == TW_NaN) )
-    {
-      return real_2op_NaN(b, tagb, deststnr, &st(0));
-    }
-  else if ( ((taga == TW_Infinity) && (tagb == TAG_Zero))
-	    || ((tagb == TW_Infinity) && (taga == TAG_Zero)) )
-    {
-      return arith_invalid(deststnr);  /* Zero*Infinity is invalid */
-    }
-  else if ( ((taga == TW_Denormal) || (tagb == TW_Denormal))
-	    && (denormal_operand() < 0) )
-    {
-      return FPU_Exception;
-    }
-  else if (taga == TW_Infinity)
-    {
-      FPU_copy_to_regi(a, TAG_Special, deststnr);
-      setsign(dest, sign);
-      return TAG_Special;
-    }
-  else if (tagb == TW_Infinity)
-    {
-      FPU_copy_to_regi(b, TAG_Special, deststnr);
-      setsign(dest, sign);
-      return TAG_Special;
-    }
+		FPU_to_exp16(a, &x);
+		FPU_to_exp16(b, &y);
+		tag = FPU_u_mul(&x, &y, dest, control_w, sign,
+				exponent16(&x) + exponent16(&y));
+		if (tag < 0) {
+			setsign(dest, saved_sign);
+			return tag;
+		}
+		FPU_settagi(deststnr, tag);
+		return tag;
+	} else if ((taga <= TW_Denormal) && (tagb <= TW_Denormal)) {
+		if (((tagb == TW_Denormal) || (taga == TW_Denormal))
+		    && (denormal_operand() < 0))
+			return FPU_Exception;
 
+		/* Must have either both arguments == zero, or
+		   one valid and the other zero.
+		   The result is therefore zero. */
+		FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
+		/* The 80486 book says that the answer is +0, but a real
+		   80486 behaves this way.
+		   IEEE-754 apparently says it should be this way. */
+		setsign(dest, sign);
+		return TAG_Zero;
+	}
+	/* Must have infinities, NaNs, etc */
+	else if ((taga == TW_NaN) || (tagb == TW_NaN)) {
+		return real_2op_NaN(b, tagb, deststnr, &st(0));
+	} else if (((taga == TW_Infinity) && (tagb == TAG_Zero))
+		   || ((tagb == TW_Infinity) && (taga == TAG_Zero))) {
+		return arith_invalid(deststnr);	/* Zero*Infinity is invalid */
+	} else if (((taga == TW_Denormal) || (tagb == TW_Denormal))
+		   && (denormal_operand() < 0)) {
+		return FPU_Exception;
+	} else if (taga == TW_Infinity) {
+		FPU_copy_to_regi(a, TAG_Special, deststnr);
+		setsign(dest, sign);
+		return TAG_Special;
+	} else if (tagb == TW_Infinity) {
+		FPU_copy_to_regi(b, TAG_Special, deststnr);
+		setsign(dest, sign);
+		return TAG_Special;
+	}
 #ifdef PARANOID
-  else
-    {
-      EXCEPTION(EX_INTERNAL|0x102);
-      return FPU_Exception;
-    }
-#endif /* PARANOID */ 
+	else {
+		EXCEPTION(EX_INTERNAL | 0x102);
+		return FPU_Exception;
+	}
+#endif /* PARANOID */
 
 	return 0;
 }

arch/x86/math-emu/status_w.h

@@ -10,7 +10,7 @@
 #ifndef _STATUS_H_
 #define _STATUS_H_
 
-#include "fpu_emu.h"    /* for definition of PECULIAR_486 */
+#include "fpu_emu.h"		/* for definition of PECULIAR_486 */
 
 #ifdef __ASSEMBLY__
 #define	Const__(x)	$##x
@@ -34,7 +34,7 @@
 #define SW_Denorm_Op   	Const__(0x0002)	/* denormalized operand */
 #define SW_Invalid     	Const__(0x0001)	/* invalid operation */
 
-#define SW_Exc_Mask     Const__(0x27f)  /* Status word exception bit mask */
+#define SW_Exc_Mask     Const__(0x27f)	/* Status word exception bit mask */
 
 #ifndef __ASSEMBLY__
 
@@ -50,8 +50,8 @@
   ((partial_status & ~SW_Top & 0xffff) | ((top << SW_Top_Shift) & SW_Top))
 static inline void setcc(int cc)
 {
-	partial_status &= ~(SW_C0|SW_C1|SW_C2|SW_C3);
-	partial_status |= (cc) & (SW_C0|SW_C1|SW_C2|SW_C3);
+	partial_status &= ~(SW_C0 | SW_C1 | SW_C2 | SW_C3);
+	partial_status |= (cc) & (SW_C0 | SW_C1 | SW_C2 | SW_C3);
 }
 
 #ifdef PECULIAR_486