From: Andrew Cagney <cagney@gnu.org>
To: cgd@broadcom.com
Cc: Richard Sandiford <rsandifo@redhat.com>, gdb-patches@sources.redhat.com
Subject: Re: [rfa/mips] Second go at vr5500 hilo hazard fix
Date: Fri, 26 Mar 2004 00:28:00 -0000 [thread overview]
Message-ID: <40637918.5000708@gnu.org> (raw)
In-Reply-To: <yov5fzbw7a07.fsf@ldt-sj3-010.sj.broadcom.com>
> At Thu, 25 Mar 2004 17:14:18 -0500, Andrew Cagney wrote:
>
>>> Look at it this way, if the igen mechanism is used, gcc is able to
>>> eliminate everything :-)
>
>
> In the case of a single-architecture sim (i.e., not 'multi', then
> yes), GCC will automatically eliminate the test.
>
> In the case of a multiple-architecture sim, it won't.
It still does (or at least can), trust me :-)
> But (a) at
> least in my mind, i'm not worried about absolute maximal performance
> from that configuration (if you want max performance, build a single
> arch sim), and (b) until somebody quantifies the difference, I'll
> claim that i don't believe it'll be a measurable difference. 8-)
But yes, you won't measure the difference.
Andrew
next prev parent reply other threads:[~2004-03-26 0:28 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-18 15:05 Richard Sandiford
[not found] ` <mailpost.1079622402.27828@news-sj1-1>
2004-03-19 0:09 ` cgd
2004-03-18 17:57 ` cgd
2004-03-18 20:55 ` Richard Sandiford
2004-03-19 0:09 ` Richard Sandiford
2004-03-19 15:19 ` Andrew Cagney
2004-03-24 7:59 ` Richard Sandiford
2004-03-24 15:59 ` cgd
2004-03-25 7:15 ` cgd
2004-03-25 7:45 ` Richard Sandiford
[not found] ` <mailpost.1080200738.13330@news-sj1-1>
2004-03-25 18:53 ` cgd
2004-03-25 22:14 ` Andrew Cagney
2004-03-26 0:01 ` cgd
2004-03-26 0:28 ` Andrew Cagney [this message]
[not found] ` <mailpost.1080260907.10999@news-sj1-1>
2004-03-26 2:19 ` cgd
2004-03-28 10:16 ` Richard Sandiford
[not found] ` <mailpost.1080469040.8967@news-sj1-1>
2004-03-29 19:38 ` cgd
2004-04-10 6:59 ` cgd
2004-03-19 0:09 ` Richard Sandiford
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