| # 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_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_MCRUSOE) += -march=i686 $(align) | |
| cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align) | |
| cflags-$(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-$(CONFIG_MATOM) += -march=atom | |
| # Geode GX1 support | |
| cflags-$(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)) |