amd64 default CFLAGS
Charles Swiger
cswiger at mac.com
Wed Mar 9 01:43:47 PST 2005
On Mar 9, 2005, at 4:27 AM, Divacky Roman wrote:
> why is it necessary (if its at all) to have this:
> -mfpmath=387 -mno-sse -mno-sse2 -mno-mmx -mno-3dnow in default CFLAGS
> for amd64
> architecture?
>
> does it serve anypurpose? sse is used in amd64 code so I dont see why
> we
> disables gcc to use it..
gcc-3.4.x for AMD64 apparently has a number of code generation bugs and
trying to do MMX or SSE on the AMD64 platform is not going to be
entirely reliable until those issues get worked out.
--
-Chuck
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