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
5tune		= $(call cc-option,-mtune=$(1),$(2))
6
7ifdef CONFIG_CC_IS_CLANG
8align		:= -falign-functions=0 $(call cc-option,-falign-jumps=0) $(call cc-option,-falign-loops=0)
9else
10align		:= -falign-functions=0 -falign-jumps=0 -falign-loops=0
11endif
12
13cflags-$(CONFIG_M486SX)		+= -march=i486
14cflags-$(CONFIG_M486)		+= -march=i486
15cflags-$(CONFIG_M586)		+= -march=i586
16cflags-$(CONFIG_M586TSC)	+= -march=i586
17cflags-$(CONFIG_M586MMX)	+= -march=pentium-mmx
18cflags-$(CONFIG_M686)		+= -march=i686
19cflags-$(CONFIG_MPENTIUMII)	+= -march=i686 $(call tune,pentium2)
20cflags-$(CONFIG_MPENTIUMIII)	+= -march=i686 $(call tune,pentium3)
21cflags-$(CONFIG_MPENTIUMM)	+= -march=i686 $(call tune,pentium3)
22cflags-$(CONFIG_MPENTIUM4)	+= -march=i686 $(call tune,pentium4)
23cflags-$(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.
26cflags-$(CONFIG_MK7)		+= -march=athlon
27cflags-$(CONFIG_MK8)		+= $(call cc-option,-march=k8,-march=athlon)
28cflags-$(CONFIG_MCRUSOE)	+= -march=i686 $(align)
29cflags-$(CONFIG_MEFFICEON)	+= -march=i686 $(call tune,pentium3) $(align)
30cflags-$(CONFIG_MWINCHIPC6)	+= $(call cc-option,-march=winchip-c6,-march=i586)
31cflags-$(CONFIG_MWINCHIP3D)	+= $(call cc-option,-march=winchip2,-march=i586)
32cflags-$(CONFIG_MCYRIXIII)	+= $(call cc-option,-march=c3,-march=i486) $(align)
33cflags-$(CONFIG_MVIAC3_2)	+= $(call cc-option,-march=c3-2,-march=i686)
34cflags-$(CONFIG_MVIAC7)		+= -march=i686
35cflags-$(CONFIG_MCORE2)		+= -march=i686 $(call tune,core2)
36cflags-$(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))
38
39# AMD Elan support
40cflags-$(CONFIG_MELAN)		+= -march=i486
41
42# Geode GX1 support
43cflags-$(CONFIG_MGEODEGX1)	+= -march=pentium-mmx
44cflags-$(CONFIG_MGEODE_LX)	+= $(call cc-option,-march=geode,-march=pentium-mmx)
45# add at the end to overwrite eventual tuning options from earlier
46# cpu entries
47cflags-$(CONFIG_X86_GENERIC) 	+= $(call tune,generic,$(call tune,i686))
48
49# Bug fix for binutils: this option is required in order to keep
50# binutils from generating NOPL instructions against our will.
51ifneq ($(CONFIG_X86_P6_NOP),y)
52cflags-y			+= $(call cc-option,-Wa$(comma)-mtune=generic32,)
53endif
54