arch/x86/Makefile_32.cpu

0001 # SPDX-License-Identifier: GPL-2.0
0002 # CPU tuning section - shared with UML.
0003 # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML.
0004
0005 tune            = $(call cc-option,-mtune=$(1),$(2))
0006
0007 ifdef CONFIG_CC_IS_CLANG
0008 align           := -falign-functions=0 $(call cc-option,-falign-jumps=0) $(call cc-option,-falign-loops=0)
0009 else
0010 align           := -falign-functions=0 -falign-jumps=0 -falign-loops=0
0011 endif
0012
0013 cflags-$(CONFIG_M486SX)         += -march=i486
0014 cflags-$(CONFIG_M486)           += -march=i486
0015 cflags-$(CONFIG_M586)           += -march=i586
0016 cflags-$(CONFIG_M586TSC)        += -march=i586
0017 cflags-$(CONFIG_M586MMX)        += -march=pentium-mmx
0018 cflags-$(CONFIG_M686)           += -march=i686
0019 cflags-$(CONFIG_MPENTIUMII)     += -march=i686 $(call tune,pentium2)
0020 cflags-$(CONFIG_MPENTIUMIII)    += -march=i686 $(call tune,pentium3)
0021 cflags-$(CONFIG_MPENTIUMM)      += -march=i686 $(call tune,pentium3)
0022 cflags-$(CONFIG_MPENTIUM4)      += -march=i686 $(call tune,pentium4)
0023 cflags-$(CONFIG_MK6)            += -march=k6
0024 # Please note, that patches that add -march=athlon-xp and friends are pointless.
0025 # They make zero difference whatsosever to performance at this time.
0026 cflags-$(CONFIG_MK7)            += -march=athlon
0027 cflags-$(CONFIG_MK8)            += $(call cc-option,-march=k8,-march=athlon)
0028 cflags-$(CONFIG_MCRUSOE)        += -march=i686 $(align)
0029 cflags-$(CONFIG_MEFFICEON)      += -march=i686 $(call tune,pentium3) $(align)
0030 cflags-$(CONFIG_MWINCHIPC6)     += $(call cc-option,-march=winchip-c6,-march=i586)
0031 cflags-$(CONFIG_MWINCHIP3D)     += $(call cc-option,-march=winchip2,-march=i586)
0032 cflags-$(CONFIG_MCYRIXIII)      += $(call cc-option,-march=c3,-march=i486) $(align)
0033 cflags-$(CONFIG_MVIAC3_2)       += $(call cc-option,-march=c3-2,-march=i686)
0034 cflags-$(CONFIG_MVIAC7)         += -march=i686
0035 cflags-$(CONFIG_MCORE2)         += -march=i686 $(call tune,core2)
0036 cflags-$(CONFIG_MATOM)          += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \
0037         $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
0038
0039 # AMD Elan support
0040 cflags-$(CONFIG_MELAN)          += -march=i486
0041
0042 # Geode GX1 support
0043 cflags-$(CONFIG_MGEODEGX1)      += -march=pentium-mmx
0044 cflags-$(CONFIG_MGEODE_LX)      += $(call cc-option,-march=geode,-march=pentium-mmx)
0045 # add at the end to overwrite eventual tuning options from earlier
0046 # cpu entries
0047 cflags-$(CONFIG_X86_GENERIC)    += $(call tune,generic,$(call tune,i686))
0048
0049 # Bug fix for binutils: this option is required in order to keep
0050 # binutils from generating NOPL instructions against our will.
0051 ifneq ($(CONFIG_X86_P6_NOP),y)
0052 cflags-y                        += $(call cc-option,-Wa$(comma)-mtune=generic32,)
0053 endif