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Re: target/8243: GCC 3.2 does not check for CMOV instructionbefore generating code
- From: Pete Gontier <kokorozashi at gontier dot org>
- To: nobody at gcc dot gnu dot org
- Cc: gcc-prs at gcc dot gnu dot org,
- Date: 13 Feb 2003 20:36:01 -0000
- Subject: Re: target/8243: GCC 3.2 does not check for CMOV instructionbefore generating code
- Reply-to: Pete Gontier <kokorozashi at gontier dot org>
The following reply was made to PR target/8243; it has been noted by GNATS.
From: Pete Gontier <kokorozashi@gontier.org>
To: <gcc-gnats@gcc.gnu.org>,
<forsmark@odense.kollegienet.dk <gcc-bugs@gcc.gnu.org <nobody@gcc.gnu.org <gcc-prs@gcc.gnu.orgCc:
Subject: Re: target/8243: GCC 3.2 does not check for CMOV instruction
before generating code
Date: Thu, 13 Feb 2003 12:34:28 -0800
circa 2/13/03 11:54 AM, Pete Gontier <kokorozashi@gontier.org> wrote:
> I don't think I fully understand the closure of this bug. I understand if by
> i686 you really mean Pentium Pro. (I hope that's documented.) The claim that
> it would be dumb for GCC to generate code which checks for CMOV before using
> it also makes sense. However, if there were a way to tell GCC not to generate
> CMOV instructions in the first place, that would seem reasonable, too,
> assuming there are other i686 optimizations worth doing.
Hmmm. Perhaps this is already present in the form of -march=c3. And from
what I hear, CMOV was the only significant optimization for i686. If this is
all true, then feel free to ignore my previous message. (Well, OK, I would
still appreciate an off-list note.)
--
Pete Gontier <http://www.pete.gontier.org/>