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Commit | Line | Data |
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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) | |
b0b1ff65 | 7 | tune = $(call cc-option,-mtune=$(1),$(2)) |
d89ea9b8 | 8 | else |
b0b1ff65 | 9 | tune = $(call cc-option,-mcpu=$(1),$(2)) |
d89ea9b8 PBG |
10 | endif |
11 | ||
96d55b88 PBG |
12 | cflags-$(CONFIG_M486) += -march=i486 |
13 | cflags-$(CONFIG_M586) += -march=i586 | |
14 | cflags-$(CONFIG_M586TSC) += -march=i586 | |
a1365647 | 15 | cflags-$(CONFIG_M586MMX) += -march=pentium-mmx |
96d55b88 | 16 | cflags-$(CONFIG_M686) += -march=i686 |
d89ea9b8 PBG |
17 | cflags-$(CONFIG_MPENTIUMII) += -march=i686 $(call tune,pentium2) |
18 | cflags-$(CONFIG_MPENTIUMIII) += -march=i686 $(call tune,pentium3) | |
19 | cflags-$(CONFIG_MPENTIUMM) += -march=i686 $(call tune,pentium3) | |
20 | cflags-$(CONFIG_MPENTIUM4) += -march=i686 $(call tune,pentium4) | |
96d55b88 PBG |
21 | cflags-$(CONFIG_MK6) += -march=k6 |
22 | # Please note, that patches that add -march=athlon-xp and friends are pointless. | |
23 | # They make zero difference whatsosever to performance at this time. | |
a1365647 AM |
24 | cflags-$(CONFIG_MK7) += -march=athlon |
25 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon) | |
39a33ff8 MY |
26 | cflags-$(CONFIG_MCRUSOE) += -march=i686 -falign-functions=0 -falign-jumps=0 -falign-loops=0 |
27 | cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) -falign-functions=0 -falign-jumps=0 -falign-loops=0 | |
96d55b88 | 28 | cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586) |
96d55b88 | 29 | cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586) |
39a33ff8 | 30 | cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) -falign-functions=0 -falign-jumps=0 -falign-loops=0 |
96d55b88 | 31 | cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) |
0949be35 | 32 | cflags-$(CONFIG_MVIAC7) += -march=i686 |
b0b1ff65 | 33 | cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2) |
366d19e1 TD |
34 | cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \ |
35 | $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) | |
96d55b88 PBG |
36 | |
37 | # AMD Elan support | |
ce9c99af | 38 | cflags-$(CONFIG_MELAN) += -march=i486 |
96d55b88 PBG |
39 | |
40 | # Geode GX1 support | |
a1365647 | 41 | cflags-$(CONFIG_MGEODEGX1) += -march=pentium-mmx |
98059e34 | 42 | cflags-$(CONFIG_MGEODE_LX) += $(call cc-option,-march=geode,-march=pentium-mmx) |
dca99a38 AK |
43 | # add at the end to overwrite eventual tuning options from earlier |
44 | # cpu entries | |
b0b1ff65 | 45 | cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic,$(call tune,i686)) |
dca99a38 | 46 | |
28f7e66f PA |
47 | # Bug fix for binutils: this option is required in order to keep |
48 | # binutils from generating NOPL instructions against our will. | |
49 | ifneq ($(CONFIG_X86_P6_NOP),y) | |
50 | cflags-y += $(call cc-option,-Wa$(comma)-mtune=generic32,) | |
51 | endif |