| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 1 | # CPU tuning section - shared with UML. |
| 2 | # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML. |
| 3 | |
| Paolo 'Blaisorblade' Giarrusso | d89ea9b | 2005-10-30 15:00:09 -0800 | [diff] [blame^] | 4 | #-mtune exists since gcc 3.4, and some -mcpu flavors didn't exist in gcc 2.95. |
| 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 | |
| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 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-$(CONFIG_M586TSC) += -march=i586 |
| 17 | cflags-$(CONFIG_M586MMX) += $(call cc-option,-march=pentium-mmx,-march=i586) |
| 18 | cflags-$(CONFIG_M686) += -march=i686 |
| Paolo 'Blaisorblade' Giarrusso | d89ea9b | 2005-10-30 15:00:09 -0800 | [diff] [blame^] | 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 $(call tune,pentium4) |
| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 23 | cflags-$(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. |
| 26 | cflags-$(CONFIG_MK7) += $(call cc-option,-march=athlon,-march=i686 $(align)-functions=4) |
| 27 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,$(call cc-option,-march=athlon,-march=i686 $(align)-functions=4)) |
| 28 | cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 |
| Paolo 'Blaisorblade' Giarrusso | d89ea9b | 2005-10-30 15:00:09 -0800 | [diff] [blame^] | 29 | cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0 |
| Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 30 | cflags-$(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) += $(call cc-option,-march=c3-2,-march=i686) |
| 35 | |
| 36 | # AMD Elan support |
| 37 | cflags-$(CONFIG_X86_ELAN) += -march=i486 |
| 38 | |
| 39 | # Geode GX1 support |
| 40 | cflags-$(CONFIG_MGEODEGX1) += $(call cc-option,-march=pentium-mmx,-march=i486) |
| 41 | |