Re: [patch 2.6.14-rc1] i386: Correct Pentium optimization

[Paolo Ornati]

On Tue, 13 Sep 2005 13:51:48 +0200 (CEST)
simrw@xxxxxxxxxxxx wrote:

> -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)


I'm not sure that it is safe, read this:

http://groups.google.it/group/linux.kernel/browse_frm/thread/89467f7aa9963d4f/b4575e40eecc713a?lnk=st&q=march%3Dpentium4+mtune+group:linux.kernel&rnum=1&hl=it#b4575e40eecc713a

-- 
	Paolo Ornati
	Linux 2.6.14-rc1 on x86_64
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