arch/i386/Makefile.cpu

   1 # CPU tuning section - shared with UML.
   2 # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML.
   3
   4 align := $(cc-option-align)
   5 cflags-$(CONFIG_M386)           += -march=i386
   6 cflags-$(CONFIG_M486)           += -march=i486
   7 cflags-$(CONFIG_M586)           += -march=i586
   8 cflags-$(CONFIG_M586TSC)        += -march=i586
   9 cflags-$(CONFIG_M586MMX)        += $(call cc-option,-march=pentium-mmx,-march=i586)
  10 cflags-$(CONFIG_M686)           += -march=i686
  11 cflags-$(CONFIG_MPENTIUMII)     += -march=i686 $(call cc-option,-mtune=pentium2)
  12 cflags-$(CONFIG_MPENTIUMIII)    += -march=i686 $(call cc-option,-mtune=pentium3)
  13 cflags-$(CONFIG_MPENTIUMM)      += -march=i686 $(call cc-option,-mtune=pentium3)
  14 cflags-$(CONFIG_MPENTIUM4)      += -march=i686 $(call cc-option,-mtune=pentium4)
  15 cflags-$(CONFIG_MK6)            += -march=k6
  16 # Please note, that patches that add -march=athlon-xp and friends are pointless.
  17 # They make zero difference whatsosever to performance at this time.
  18 cflags-$(CONFIG_MK7)            += $(call cc-option,-march=athlon,-march=i686 $(align)-functions=4)
  19 cflags-$(CONFIG_MK8)            += $(call cc-option,-march=k8,$(call cc-option,-march=athlon,-march=i686 $(align)-functions=4))
  20 cflags-$(CONFIG_MCRUSOE)        += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
  21 cflags-$(CONFIG_MEFFICEON)      += -march=i686 $(call cc-option,-mtune=pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
  22 cflags-$(CONFIG_MWINCHIPC6)     += $(call cc-option,-march=winchip-c6,-march=i586)
  23 cflags-$(CONFIG_MWINCHIP2)      += $(call cc-option,-march=winchip2,-march=i586)
  24 cflags-$(CONFIG_MWINCHIP3D)     += $(call cc-option,-march=winchip2,-march=i586)
  25 cflags-$(CONFIG_MCYRIXIII)      += $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
  26 cflags-$(CONFIG_MVIAC3_2)       += $(call cc-option,-march=c3-2,-march=i686)
  27
  28 # AMD Elan support
  29 cflags-$(CONFIG_X86_ELAN)       += -march=i486
  30
  31 # Geode GX1 support
  32 cflags-$(CONFIG_MGEODEGX1)              += $(call cc-option,-march=pentium-mmx,-march=i486)
  33