projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 96d55b88 PBG |
1 | # CPU tuning section - shared with UML. |
| 2 | # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML. | |
| 3 | ||
| a1365647 | 4 | #-mtune exists since gcc 3.4 |
| d89ea9b8 PBG |
5 | HAS_MTUNE := $(call cc-option-yn, -mtune=i386) |
| 6 | ifeq ($(HAS_MTUNE),y) | |
| 7 | tune = $(call cc-option,-mtune=$(1),) | |
| 8 | else | |
| 9 | tune = $(call cc-option,-mcpu=$(1),) | |
| 10 | endif | |
| 11 | ||
| 96d55b88 PBG |
12 | align := $(cc-option-align) |
| 13 | cflags-$(CONFIG_M386) += -march=i386 | |
| 14 | cflags-$(CONFIG_M486) += -march=i486 | |
| 15 | cflags-$(CONFIG_M586) += -march=i586 | |
| 16 | cflags-$(CONFIG_M586TSC) += -march=i586 | |
| a1365647 | 17 | cflags-$(CONFIG_M586MMX) += -march=pentium-mmx |
| 96d55b88 | 18 | cflags-$(CONFIG_M686) += -march=i686 |
| d89ea9b8 PBG |
19 | cflags-$(CONFIG_MPENTIUMII) += -march=i686 $(call tune,pentium2) |
| 20 | cflags-$(CONFIG_MPENTIUMIII) += -march=i686 $(call tune,pentium3) | |
| 21 | cflags-$(CONFIG_MPENTIUMM) += -march=i686 $(call tune,pentium3) | |
| 22 | cflags-$(CONFIG_MPENTIUM4) += -march=i686 $(call tune,pentium4) | |
| 96d55b88 PBG |
23 | cflags-$(CONFIG_MK6) += -march=k6 |
| 24 | # Please note, that patches that add -march=athlon-xp and friends are pointless. | |
| 25 | # They make zero difference whatsosever to performance at this time. | |
| a1365647 AM |
26 | cflags-$(CONFIG_MK7) += -march=athlon |
| 27 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon) | |
| 96d55b88 | 28 | cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 |
| d89ea9b8 | 29 | cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 |
| 96d55b88 PBG |
30 | cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586) |
| 31 | cflags-$(CONFIG_MWINCHIP2) += $(call cc-option,-march=winchip2,-march=i586) | |
| 32 | cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586) | |
| 33 | cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 | |
| 34 | cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) | |
| c55d92d1 | 35 | cflags-$(CONFIG_MCORE2) += -march=i686 $(call cc-option,-mtune=core2,$(call cc-option,-mtune=generic,-mtune=i686)) |
| 96d55b88 PBG |
36 | |
| 37 | # AMD Elan support | |
| 38 | cflags-$(CONFIG_X86_ELAN) += -march=i486 | |
| 39 | ||
| 40 | # Geode GX1 support | |
| a1365647 | 41 | cflags-$(CONFIG_MGEODEGX1) += -march=pentium-mmx |
| 96d55b88 | 42 | |
| dca99a38 AK |
43 | # add at the end to overwrite eventual tuning options from earlier |
| 44 | # cpu entries | |
| 45 | cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic) | |
| 46 |