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authorLinus Torvalds <torvalds@ppc970.osdl.org>2004-12-23 21:09:54 -0800
committerLinus Torvalds <torvalds@ppc970.osdl.org>2004-12-23 21:09:54 -0800
commit3ddb6f1c003bff156765a04dcfb42d68de0a0fa5 (patch)
tree373f2b1e81e3f663139c6690a6471f0863c4b1fd
parent98113cc026227d8a7a8ed490341c1d9741810fe6 (diff)
Don't use "-march=pentium3" for gcc tuning.
rth tells me that some versions of gcc may end up using the SSE registers for data movement when you do that. Use "-march=i686 -mtune=xxxx" instead. (We do the same thing for march=pentium2/4 too, just for consistency).
-rw-r--r--arch/i386/Makefile10
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index b2f59309f5da..8be151e67258 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -32,17 +32,17 @@ 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) += $(call cc-option,-march=pentium2,-march=i686)
-cflags-$(CONFIG_MPENTIUMIII) += $(call cc-option,-march=pentium3,-march=i686)
-cflags-$(CONFIG_MPENTIUMM) += $(call cc-option,-march=pentium3,-march=i686)
-cflags-$(CONFIG_MPENTIUM4) += $(call cc-option,-march=pentium4,-march=i686)
+cflags-$(CONFIG_MPENTIUMII) += -march=i686 $(call cc-option,-mtune=pentium2)
+cflags-$(CONFIG_MPENTIUMIII) += -march=i686 $(call cc-option,-mtune=pentium3)
+cflags-$(CONFIG_MPENTIUMM) += -march=i686 $(call cc-option,-mtune=pentium3)
+cflags-$(CONFIG_MPENTIUM4) += -march=i686 $(call cc-option,-mtune=pentium4)
cflags-$(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) += $(call cc-option,-march=pentium3,-march=i686) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
+cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call cc-option,-mtune=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)