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Date: Sun, 06 Apr 2003 16:49:00 -0000
From: Segher Boessenkool <segher@koffie.nl>
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To: Roger Sayle <roger@www.eyesopen.com>
Cc: David Edelsohn <dje@watson.ibm.com>, gcc@gcc.gnu.org
Subject: Re: Strange conditional jumps on the POWER4
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Roger Sayle wrote:
> With gcc-3.2 -O2 -ffast-math:
> N7 assignments         3.00000000000000000                  92.323    9.640

> With gcc-3.4 -O2 -ffast-math:
> N7 assignments         3.00000000000000000                 137.619    7.720

> With gcc-3.4 -O2 -ffast-math -mcpu=power4
> N7 assignments         3.00000000000000000                  88.334   12.090

That last one looks very bad, too.  Could you post source
and asm snippets for that?


Segher