196625Stjr# SPDX-License-Identifier: GPL-2.0 296625Stjr# CPU tuning section - shared with UML. 396625Stjr# Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML. 496625Stjr 596625Stjrtune = $(call cc-option,-mtune=$(1),$(2)) 696625Stjr 796625Stjrifdef CONFIG_CC_IS_CLANG 896625Stjralign := -falign-functions=0 $(call cc-option,-falign-jumps=0) $(call cc-option,-falign-loops=0) 996625Stjrelse 1096625Stjralign := -falign-functions=0 -falign-jumps=0 -falign-loops=0 1196625Stjrendif 1296625Stjr 1396625Stjrcflags-$(CONFIG_M486SX) += -march=i486 1496625Stjrcflags-$(CONFIG_M486) += -march=i486 1596625Stjrcflags-$(CONFIG_M586) += -march=i586 1696625Stjrcflags-$(CONFIG_M586TSC) += -march=i586 1796625Stjrcflags-$(CONFIG_M586MMX) += -march=pentium-mmx 1896625Stjrcflags-$(CONFIG_M686) += -march=i686 1996625Stjrcflags-$(CONFIG_MPENTIUMII) += -march=i686 $(call tune,pentium2) 2096625Stjrcflags-$(CONFIG_MPENTIUMIII) += -march=i686 $(call tune,pentium3) 2196625Stjrcflags-$(CONFIG_MPENTIUMM) += -march=i686 $(call tune,pentium3) 2296625Stjrcflags-$(CONFIG_MPENTIUM4) += -march=i686 $(call tune,pentium4) 2396625Stjrcflags-$(CONFIG_MK6) += -march=k6 2496625Stjr# Please note, that patches that add -march=athlon-xp and friends are pointless. 2596625Stjr# They make zero difference whatsosever to performance at this time. 2696625Stjrcflags-$(CONFIG_MK7) += -march=athlon 2796625Stjrcflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon) 2896625Stjrcflags-$(CONFIG_MCRUSOE) += -march=i686 $(align) 2996625Stjrcflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align) 3096625Stjrcflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586) 3196625Stjrcflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586) 3296625Stjrcflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align) 3396628Stjrcflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) 3496625Stjrcflags-$(CONFIG_MVIAC7) += -march=i686 3596625Stjrcflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2) 3696625Stjrcflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \ 3796625Stjr $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) 3896625Stjr 3996625Stjr# AMD Elan support 4096625Stjrcflags-$(CONFIG_MELAN) += -march=i486 4196625Stjr 4296625Stjr# Geode GX1 support 4396625Stjrcflags-$(CONFIG_MGEODEGX1) += -march=pentium-mmx 4496625Stjrcflags-$(CONFIG_MGEODE_LX) += $(call cc-option,-march=geode,-march=pentium-mmx) 4596625Stjr# add at the end to overwrite eventual tuning options from earlier 4696625Stjr# cpu entries 4796625Stjrcflags-$(CONFIG_X86_GENERIC) += $(call tune,generic,$(call tune,i686)) 4896625Stjr 4996625Stjr# Bug fix for binutils: this option is required in order to keep 5096625Stjr# binutils from generating NOPL instructions against our will. 5197597Sruifneq ($(CONFIG_X86_P6_NOP),y) 5297597Srucflags-y += $(call cc-option,-Wa$(comma)-mtune=generic32,) 5397597Sruendif 5497597Sru