Message-ID: <3974.192.168.6.50.1126612308.squirrel@simlinux>
Date: Tue, 13 Sep 2005 13:51:48 +0200 (CEST)
Subject: [patch 2.6.14-rc1] i386: Correct Pentium optimization
From: simrw@sim-basis.de
To: linux-kernel@vger.kernel.org
Cc: akpm@osdl.org
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GCC 3.x apparently does not allow the -mtune option when specifying
-march=i686. This means that P-2/3/4/M never get optimzed.
Change the i386 Makefile to cater for this.

Signed-off-by: Roger While <simrw@sim-basis.de>

Patch also as attachment as Squirrel is sure to mangle.

Roger While

diff -Naur linux-2.6.14/arch/i386/Makefile
linux-2.6.14patch/arch/i386/Makefile
--- linux-2.6.14/arch/i386/Makefile     2005-09-13 13:16:22.000000000 +0200
+++ linux-2.6.14patch/arch/i386/Makefile        2005-09-13
13:11:47.000000000 +0200
@@ -41,10 +41,10 @@
 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 $(call
cc-option,-mtune=pentium2)
-cflags-$(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_MPENTIUMII)    += $(call
cc-option,-march=pentium2,-march=i686)
+cflags-$(CONFIG_MPENTIUMIII)   += $(call
cc-option,-march=pentium3,-march=i686)
+cflags-$(CONFIG_MPENTIUMM)     += $(call
cc-option,-march=pentium-m,-march=i686)
+cflags-$(CONFIG_MPENTIUM4)     += $(call
cc-option,-march=pentium4,-march=i686)
 cflags-$(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.
------=_20050913135148_72863
Content-Type: text/plain; name="pentiumgcc.patch"
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Content-Disposition: attachment; filename="pentiumgcc.patch"

diff -Naur linux-2.6.14/arch/i386/Makefile linux-2.6.14patch/arch/i386/Makefile
--- linux-2.6.14/arch/i386/Makefile	2005-09-13 13:16:22.000000000 +0200
+++ linux-2.6.14patch/arch/i386/Makefile	2005-09-13 13:11:47.000000000 +0200
@@ -41,10 +41,10 @@
 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 $(call cc-option,-mtune=pentium2)
-cflags-$(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_MPENTIUMII)	+= $(call cc-option,-march=pentium2,-march=i686)
+cflags-$(CONFIG_MPENTIUMIII)	+= $(call cc-option,-march=pentium3,-march=i686)
+cflags-$(CONFIG_MPENTIUMM)	+= $(call cc-option,-march=pentium-m,-march=i686)
+cflags-$(CONFIG_MPENTIUM4)	+= $(call cc-option,-march=pentium4,-march=i686)
 cflags-$(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.
------=_20050913135148_72863--


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