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Re: [patch] require sse3 for fisttp

From: Eric Christopher <echristo at apple dot com>
To: Andrew Pinski <pinskia at physics dot uc dot edu>
Cc: Uros Bizjak <ubizjak at gmail dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Sat, 16 Sep 2006 21:41:34 -0700
Subject: Re: [patch] require sse3 for fisttp
References: <450BC7AD.7060900@gmail.com> <450C738B.3060504@apple.com> <1158453218.25064.45.camel@celery.andrew.com>

Andrew Pinski wrote:

On Sat, 2006-09-16 at 14:58 -0700, Eric Christopher wrote:
No, this isn't OK if he has a core that is very like nocona, but doesn't have the sse3 instruction set. This will cause an invalid instruction error.
The user should not have used -march=nocona but instead -mtune=nocona
if he wants the tuning but not the architecture features that the nocona
core has.

Not if he wanted all of the processor features as well.

Here's to sum up my position:

-mno-sse3 should turn off all instructions that will fault if there is no sse3 support on a chip.

-eric

Follow-Ups:
- Re: [patch] require sse3 for fisttp
  - From: Andrew Pinski

References:
- Re: [patch] require sse3 for fisttp
  - From: Uros Bizjak
- Re: [patch] require sse3 for fisttp
  - From: Eric Christopher
- Re: [patch] require sse3 for fisttp
  - From: Andrew Pinski

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