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Re: [PATCH] Fix powl on i386/x86_64 [BZ #258] (take 2)

From: Ulrich Drepper <drepper at redhat dot com>
To: Jakub Jelinek <jakub at redhat dot com>
Cc: Glibc hackers <libc-hacker at sources dot redhat dot com>
Date: Fri, 16 Jul 2004 10:07:16 -0700
Subject: Re: [PATCH] Fix powl on i386/x86_64 [BZ #258] (take 2)
Organization: Red Hat, Inc.
References: <20040714160203.GQ5191@sunsite.ms.mff.cuni.cz> <20040715093555.GA9816@sunsite.ms.mff.cuni.cz>

Jakub Jelinek wrote:

> -4:	fldl	MO(one)		// 1 : x
> +4:	fld1			// 1 : x

I deliberately avoided the use of fld1 since all my measurements showed
it is slower.  Please some some measurements of your own.  As far as I
remember the only time when it paid off to use fld1 is when the fld was
the only memory operation and therefore it could be avoided to load the
PIC register.

-- 
â Ulrich Drepper â Red Hat, Inc. â 444 Castro St â Mountain View, CA â

Follow-Ups:
- Re: [PATCH] Fix powl on i386/x86_64 [BZ #258] (take 2)
  - From: Jakub Jelinek

References:
- [PATCH] Fix powl on x86_64 [BZ #258]
  - From: Jakub Jelinek
- [PATCH] Fix powl on i386/x86_64 [BZ #258] (take 2)
  - From: Jakub Jelinek

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