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-rw-r--r--arch/i386/Makefile.cpu41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/i386/Makefile.cpu b/arch/i386/Makefile.cpu
new file mode 100644
index 00000000000..8e51456df23
--- /dev/null
+++ b/arch/i386/Makefile.cpu
@@ -0,0 +1,41 @@
+# CPU tuning section - shared with UML.
+# Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML.
+
+#-mtune exists since gcc 3.4, and some -mcpu flavors didn't exist in gcc 2.95.
+HAS_MTUNE := $(call cc-option-yn, -mtune=i386)
+ifeq ($(HAS_MTUNE),y)
+tune = $(call cc-option,-mtune=$(1),)
+else
+tune = $(call cc-option,-mcpu=$(1),)
+endif
+
+align := $(cc-option-align)
+cflags-$(CONFIG_M386) += -march=i386
+cflags-$(CONFIG_M486) += -march=i486
+cflags-$(CONFIG_M586) += -march=i586
+cflags-$(CONFIG_M586TSC) += -march=i586
+cflags-$(CONFIG_M586MMX) += $(call cc-option,-march=pentium-mmx,-march=i586)
+cflags-$(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) += $(call cc-option,-march=athlon,-march=i686 $(align)-functions=4)
+cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,$(call cc-option,-march=athlon,-march=i686 $(align)-functions=4))
+cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
+cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
+cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586)
+cflags-$(CONFIG_MWINCHIP2) += $(call cc-option,-march=winchip2,-march=i586)
+cflags-$(CONFIG_MWINCHIP3D) += $(call cc-option,-march=winchip2,-march=i586)
+cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
+cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686)
+
+# AMD Elan support
+cflags-$(CONFIG_X86_ELAN) += -march=i486
+
+# Geode GX1 support
+cflags-$(CONFIG_MGEODEGX1) += $(call cc-option,-march=pentium-mmx,-march=i486)
+