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@@ -1,3 +1,33 @@
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+#if __LINUX_ARM_ARCH__ >= 6
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+ .macro bitop, instr
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+ mov r2, #1
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+ and r3, r0, #7 @ Get bit offset
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+ add r1, r1, r0, lsr #3 @ Get byte offset
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+ mov r3, r2, lsl r3
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+1: ldrexb r2, [r1]
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+ \instr r2, r2, r3
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+ strexb r0, r2, [r1]
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+ cmpne r0, #0
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+ bne 1b
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+ mov pc, lr
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+ .endm
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+
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+ .macro testop, instr, store
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+ and r3, r0, #7 @ Get bit offset
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+ mov r2, #1
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+ add r1, r1, r0, lsr #3 @ Get byte offset
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+ mov r3, r2, lsl r3 @ create mask
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+1: ldrexb r2, [r1]
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+ ands r0, r2, r3 @ save old value of bit
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+ \instr ip, r2, r3 @ toggle bit
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+ strexb r2, ip, [r1]
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+ cmp r2, #0
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+ bne 1b
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+ cmp r0, #0
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+ movne r0, #1
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+2: mov pc, lr
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+ .endm
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+#else
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.macro bitop, instr
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and r2, r0, #7
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mov r3, #1
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@@ -31,3 +61,4 @@
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moveq r0, #0
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mov pc, lr
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.endm
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+#endif
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