]>
Commit | Line | Data |
---|---|---|
1 | # SPDX-License-Identifier: GPL-2.0 | |
2 | # CPU tuning section - shared with UML. | |
3 | # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML. | |
4 | ||
5 | #-mtune exists since gcc 3.4 | |
6 | HAS_MTUNE := $(call cc-option-yn, -mtune=i386) | |
7 | ifeq ($(HAS_MTUNE),y) | |
8 | tune = $(call cc-option,-mtune=$(1),$(2)) | |
9 | else | |
10 | tune = $(call cc-option,-mcpu=$(1),$(2)) | |
11 | endif | |
12 | ||
13 | cflags-$(CONFIG_M486) += -march=i486 | |
14 | cflags-$(CONFIG_M586) += -march=i586 | |
15 | cflags-$(CONFIG_M586TSC) += -march=i586 | |
16 | cflags-$(CONFIG_M586MMX) += -march=pentium-mmx | |
17 | cflags-$(CONFIG_M686) += -march=i686 | |
18 | cflags-$(CONFIG_MPENTIUMII) += -march=i686 $(call tune,pentium2) | |
19 | cflags-$(CONFIG_MPENTIUMIII) += -march=i686 $(call tune,pentium3) | |
20 | cflags-$(CONFIG_MPENTIUMM) += -march=i686 $(call tune,pentium3) | |
21 | cflags-$(CONFIG_MPENTIUM4) += -march=i686 $(call tune,pentium4) | |
22 | cflags-$(CONFIG_MK6) += -march=k6 | |
23 | # Please note, that patches that add -march=athlon-xp and friends are pointless. | |
24 | # They make zero difference whatsosever to performance at this time. | |
25 | cflags-$(CONFIG_MK7) += -march=athlon | |
26 | cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon) | |
27 | cflags-$(CONFIG_MCRUSOE) += -march=i686 -falign-functions=0 -falign-jumps=0 -falign-loops=0 | |
28 | cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) -falign-functions=0 -falign-jumps=0 -falign-loops=0 | |
29 | cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586) | |
30 | cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586) | |
31 | cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) -falign-functions=0 -falign-jumps=0 -falign-loops=0 | |
32 | cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) | |
33 | cflags-$(CONFIG_MVIAC7) += -march=i686 | |
34 | cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2) | |
35 | cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \ | |
36 | $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) | |
37 | ||
38 | # AMD Elan support | |
39 | cflags-$(CONFIG_MELAN) += -march=i486 | |
40 | ||
41 | # Geode GX1 support | |
42 | cflags-$(CONFIG_MGEODEGX1) += -march=pentium-mmx | |
43 | cflags-$(CONFIG_MGEODE_LX) += $(call cc-option,-march=geode,-march=pentium-mmx) | |
44 | # add at the end to overwrite eventual tuning options from earlier | |
45 | # cpu entries | |
46 | cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic,$(call tune,i686)) | |
47 | ||
48 | # Bug fix for binutils: this option is required in order to keep | |
49 | # binutils from generating NOPL instructions against our will. | |
50 | ifneq ($(CONFIG_X86_P6_NOP),y) | |
51 | cflags-y += $(call cc-option,-Wa$(comma)-mtune=generic32,) | |
52 | endif |