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arch
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i386
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Makefile.cpu

Makefile.cpu 2.0 KB
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  1. # CPU tuning section - shared with UML.
    2. 

  2. # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML.
    3. 

  3. 

  4. #-mtune exists since gcc 3.4
    5. 

  5. HAS_MTUNE	:= $(call cc-option-yn, -mtune=i386)
    6. 

  6. ifeq ($(HAS_MTUNE),y)
    7. 

  7. tune		= $(call cc-option,-mtune=$(1),)
    8. 

  8. else
    9. 

  9. tune		= $(call cc-option,-mcpu=$(1),)
    10. 

  10. endif
    11. 

  11. 

  12. align := $(cc-option-align)
    13. 

  13. cflags-$(CONFIG_M386)		+= -march=i386
    14. 

  14. cflags-$(CONFIG_M486)		+= -march=i486
    15. 

  15. cflags-$(CONFIG_M586)		+= -march=i586
    16. 

  16. cflags-$(CONFIG_M586TSC)	+= -march=i586
    17. 

  17. cflags-$(CONFIG_M586MMX)	+= -march=pentium-mmx
    18. 

  18. cflags-$(CONFIG_M686)		+= -march=i686
    19. 

  19. cflags-$(CONFIG_MPENTIUMII)	+= -march=i686 $(call tune,pentium2)
    20. 

  20. cflags-$(CONFIG_MPENTIUMIII)	+= -march=i686 $(call tune,pentium3)
    21. 

  21. cflags-$(CONFIG_MPENTIUMM)	+= -march=i686 $(call tune,pentium3)
    22. 

  22. cflags-$(CONFIG_MPENTIUM4)	+= -march=i686 $(call tune,pentium4)
    23. 

  23. cflags-$(CONFIG_MK6)		+= -march=k6
    24. 

  24. # Please note, that patches that add -march=athlon-xp and friends are pointless.
    25. 

  25. # They make zero difference whatsosever to performance at this time.
    26. 

  26. cflags-$(CONFIG_MK7)		+= -march=athlon
    27. 

  27. cflags-$(CONFIG_MK8)		+= $(call cc-option,-march=k8,-march=athlon)
    28. 

  28. cflags-$(CONFIG_MCRUSOE)	+= -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
    29. 

  29. cflags-$(CONFIG_MEFFICEON)	+= -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
    30. 

  30. cflags-$(CONFIG_MWINCHIPC6)	+= $(call cc-option,-march=winchip-c6,-march=i586)
    31. 

  31. cflags-$(CONFIG_MWINCHIP2)	+= $(call cc-option,-march=winchip2,-march=i586)
    32. 

  32. cflags-$(CONFIG_MWINCHIP3D)	+= $(call cc-option,-march=winchip2,-march=i586)
    33. 

  33. cflags-$(CONFIG_MCYRIXIII)	+= $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
    34. 

  34. cflags-$(CONFIG_MVIAC3_2)	+= $(call cc-option,-march=c3-2,-march=i686)
    35. 

  35. 

  36. # AMD Elan support
    37. 

  37. cflags-$(CONFIG_X86_ELAN)	+= -march=i486
    38. 

  38. 

  39. # Geode GX1 support
    40. 

  40. cflags-$(CONFIG_MGEODEGX1)	+= -march=pentium-mmx
    41. 

  41. 

  42. # add at the end to overwrite eventual tuning options from earlier
    43. 

  43. # cpu entries
    44. 

  44. cflags-$(CONFIG_X86_GENERIC) 	+= $(call tune,generic)
    45. 

  45.