| # SPDX-License-Identifier: GPL-2.0 |
| # CPU tuning section - shared with UML. |
| # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML. |
| |
| tune = $(call cc-option,-mtune=$(1),$(2)) |
| |
| ifdef CONFIG_CC_IS_CLANG |
| align := -falign-functions=0 $(call cc-option,-falign-jumps=0) $(call cc-option,-falign-loops=0) |
| else |
| align := -falign-functions=0 -falign-jumps=0 -falign-loops=0 |
| endif |
| |
| cflags-$(CONFIG_M486SX) += -march=i486 |
| cflags-$(CONFIG_M486) += -march=i486 |
| cflags-$(CONFIG_M586) += -march=i586 |
| cflags-$(CONFIG_M586TSC) += -march=i586 |
| cflags-$(CONFIG_M586MMX) += -march=pentium-mmx |
| cflags-$(CONFIG_M686) += -march=i686 |
| cflags-$(CONFIG_MPENTIUMII) += -march=i686 $(call tune,pentium2) |
| cflags-$(CONFIG_MPENTIUMIII) += -march=i686 $(call tune,pentium3) |
| cflags-$(CONFIG_MPENTIUMM) += -march=i686 $(call tune,pentium3) |
| cflags-$(CONFIG_MPENTIUM4) += -march=i686 $(call tune,pentium4) |
| cflags-$(CONFIG_MK6) += -march=k6 |
| # Please note, that patches that add -march=athlon-xp and friends are pointless. |
| # They make zero difference whatsosever to performance at this time. |
| cflags-$(CONFIG_MK7) += -march=athlon |
| cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon) |
| cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align) |
| cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align) |
| cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586) |
| cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586) |
| cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align) |
| cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) |
| cflags-$(CONFIG_MVIAC7) += -march=i686 |
| cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2) |
| cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \ |
| $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) |
| |
| # AMD Elan support |
| cflags-$(CONFIG_MELAN) += -march=i486 |
| |
| # Geode GX1 support |
| cflags-$(CONFIG_MGEODEGX1) += -march=pentium-mmx |
| cflags-$(CONFIG_MGEODE_LX) += $(call cc-option,-march=geode,-march=pentium-mmx) |
| # add at the end to overwrite eventual tuning options from earlier |
| # cpu entries |
| cflags-$(CONFIG_X86_GENERIC) += $(call tune,generic,$(call tune,i686)) |
| |
| # Bug fix for binutils: this option is required in order to keep |
| # binutils from generating NOPL instructions against our will. |
| ifneq ($(CONFIG_X86_P6_NOP),y) |
| cflags-y += $(call cc-option,-Wa$(comma)-mtune=generic32,) |
| endif |
