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From: Richard Henderson <rth@redhat.com>
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org,
Subject: Re: target/5381: compiler does not issue emmx
Date: Tue, 15 Jan 2002 04:26:00 -0000 [thread overview]
Message-ID: <20020115122624.15852.qmail@sources.redhat.com> (raw)
The following reply was made to PR target/5381; it has been noted by GNATS.
From: Richard Henderson <rth@redhat.com>
To: David Kastrup <David.Kastrup@t-online.de>
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: target/5381: compiler does not issue emmx
Date: Tue, 15 Jan 2002 04:16:03 -0800
On Tue, Jan 15, 2002 at 09:07:37AM +0100, David Kastrup wrote:
> If the user put emmx instructions in at a place where the compiler
> decided to leave a variable in an MMX register for optimization purposes...
Nope. The __builtin_emmx function clobbers all of the mmx registers,
so the compiler knows that any spillage must happen before that.
r~
next reply other threads:[~2002-01-15 12:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-15 4:26 Richard Henderson [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-01-15 0:16 David Kastrup
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