Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
96d55b88 PBG |
2 | # CPU tuning section - shared with UML. |
3 | # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML. | |
4 | ||
b0b1ff65 | 5 | tune = $(call cc-option,-mtune=$(1),$(2)) |
d89ea9b8 | 6 | |
7fa6a274 NC |
7 | ifdef CONFIG_CC_IS_CLANG |
8 | align := -falign-functions=0 $(call cc-option,-falign-jumps=0) $(call cc-option,-falign-loops=0) | |
9 | else | |
10 | align := -falign-functions=0 -falign-jumps=0 -falign-loops=0 | |
11 | endif | |
12 | ||
87d6021b | 13 | cflags-$(CONFIG_M486SX) += -march=i486 |
96d55b88 PBG |
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) += $(call cc-option,-march=k8,-march=athlon) | |
7fa6a274 NC |
28 | cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align) |
29 | cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align) | |
96d55b88 | 30 | cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586) |
96d55b88 | 31 | cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586) |
7fa6a274 | 32 | cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align) |
96d55b88 | 33 | cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) |
0949be35 | 34 | cflags-$(CONFIG_MVIAC7) += -march=i686 |
b0b1ff65 | 35 | cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2) |
366d19e1 TD |
36 | cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \ |
37 | $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) | |
96d55b88 PBG |
38 | |
39 | # AMD Elan support | |
ce9c99af | 40 | cflags-$(CONFIG_MELAN) += -march=i486 |
96d55b88 PBG |
41 | |
42 | # Geode GX1 support | |
a1365647 | 43 | cflags-$(CONFIG_MGEODEGX1) += -march=pentium-mmx |
98059e34 | 44 | cflags-$(CONFIG_MGEODE_LX) += $(call cc-option,-march=geode,-march=pentium-mmx) |
dca99a38 AK |
45 | # add at the end to overwrite eventual tuning options from earlier |
46 | # cpu entries | |
b0b1ff65 | 47 | cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic,$(call tune,i686)) |
dca99a38 | 48 | |
28f7e66f PA |
49 | # Bug fix for binutils: this option is required in order to keep |
50 | # binutils from generating NOPL instructions against our will. | |
51 | ifneq ($(CONFIG_X86_P6_NOP),y) | |
52 | cflags-y += $(call cc-option,-Wa$(comma)-mtune=generic32,) | |
53 | endif |