| # CPU tuning section - shared with UML. | |
| # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML. | |
| #-mtune exists since gcc 3.4 | |
| HAS_MTUNE := $(call cc-option-yn, -mtune=i386) | |
| ifeq ($(HAS_MTUNE),y) | |
| tune = $(call cc-option,-mtune=$(1),) | |
| else | |
| tune = $(call cc-option,-mcpu=$(1),) | |
| endif | |
| align := $(cc-option-align) | |
| cflags-$(CONFIG_M386) += -march=i386 | |
| cflags-$(CONFIG_M486) += -march=i486 | |
| cflags-$(CONFIG_M586) += -march=i586 | |
| cflags-$(CONFIG_M586TSC) += -march=i586 | |
| cflags-$(CONFIG_M586MMX) += -march=pentium-mmx | |
| cflags-$(CONFIG_M686) += -march=i686 | |
| cflags-$(CONFIG_MPENTIUMII) += -march=i686 $(call tune,pentium2) | |
| cflags-$(CONFIG_MPENTIUMIII) += -march=i686 $(call tune,pentium3) | |
| cflags-$(CONFIG_MPENTIUMM) += -march=i686 $(call tune,pentium3) | |
| cflags-$(CONFIG_MPENTIUM4) += -march=i686 $(call tune,pentium4) | |
| cflags-$(CONFIG_MK6) += -march=k6 | |
| # Please note, that patches that add -march=athlon-xp and friends are pointless. | |
| # They make zero difference whatsosever to performance at this time. | |
| cflags-$(CONFIG_MK7) += -march=athlon | |
| cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon) | |
| cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 | |
| cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 | |
| cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586) | |
| cflags-$(CONFIG_MWINCHIP2) += $(call cc-option,-march=winchip2,-march=i586) | |
| cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586) | |
| cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 | |
| cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) | |
| # AMD Elan support | |
| cflags-$(CONFIG_X86_ELAN) += -march=i486 | |
| # Geode GX1 support | |
| cflags-$(CONFIG_MGEODEGX1) += -march=pentium-mmx | |
| # add at the end to overwrite eventual tuning options from earlier | |
| # cpu entries | |
| cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic) | |