From: dewar@gnat.com (Robert Dewar)
To: dewar@gnat.com, lord@emf.net
Cc: denisc@overta.ru, gcc@gcc.gnu.org, ja_walker@earthlink.net
Subject: Re: An unusual Performance approach using Synthetic registers
Date: Sun, 05 Jan 2003 14:08:00 -0000 [thread overview]
Message-ID: <20030105140515.3119CF2DD2@nile.gnat.com> (raw)
> Bah. I missed that (misread while skimming, actually). Maybe his
> implementation approach is bogus after all. Why not use the FP, if
> it's there, or SP when FP is omitted.
>
well indeed FP makes more sense, and that's why the discussoin lead there
> But it can also improve both locality and the temporally proximate
> re-use of memory locations.
That's really not an issue for scalars. L1 caches are small but not that
small. once again, empirically most references to local stack frames are
in cache anyway, so there's really not much to improve here.
> ja_walker is right: it's a worthwhile emperical question
it's reasonable to ask the question, but the way to explore the answer is
to study some examples in detail. I think you will find it is very
difficult to provide even one semi-convincing example if you look at it
in detail.
next reply other threads:[~2003-01-05 14:05 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-05 14:08 Robert Dewar [this message]
2003-01-05 16:50 ` Michael S. Zick
2003-01-06 19:42 ` Tom Lord
2003-01-06 8:06 ` Andy Walker
2003-01-06 22:45 ` Michael S. Zick
2003-01-07 6:04 ` Andy Walker
-- strict thread matches above, loose matches on Subject: below --
2003-01-08 12:27 Robert Dewar
2003-01-08 12:13 Robert Dewar
2003-01-08 12:21 ` Lars Segerlund
2003-01-08 5:36 Robert Dewar
2003-01-07 21:01 Marcel Cox
2003-01-07 22:53 ` tm_gccmail
2003-01-08 1:05 ` tm_gccmail
2003-01-08 1:22 ` tm_gccmail
2003-01-08 11:45 ` Marcel Cox
2003-01-08 17:29 ` Marcel Cox
2003-01-07 17:19 Robert Dewar
2003-01-07 15:17 Robert Dewar
2003-01-07 17:02 ` Michael S. Zick
2003-01-08 6:56 ` Andy Walker
2003-01-08 12:14 ` Michael S. Zick
2003-01-07 12:32 Robert Dewar
2003-01-07 19:03 ` tm_gccmail
2003-01-07 19:20 ` tm_gccmail
2003-01-08 7:52 ` Andy Walker
2003-01-08 19:29 ` Michael S. Zick
2003-01-08 20:10 ` Michael S. Zick
2003-01-08 20:44 ` tm_gccmail
2003-01-08 21:34 ` Michael S. Zick
2003-01-08 22:05 ` tm_gccmail
2003-01-08 6:08 ` Andy Walker
2003-01-07 12:08 Robert Dewar
2003-01-07 12:10 ` Momchil Velikov
2003-01-06 20:59 Robert Dewar
2003-01-07 5:29 ` Andy Walker
2003-01-07 21:49 ` Marcel Cox
2003-01-07 21:55 ` Branko Čibej
2003-01-07 21:55 ` Marcel Cox
2003-01-08 17:32 ` Tom Lord
2003-01-05 15:47 Robert Dewar
2003-01-05 22:14 ` Tom Lord
2003-01-05 14:05 Robert Dewar
2003-01-06 19:42 ` Tom Lord
2003-01-06 6:49 ` Andy Walker
2003-01-05 13:13 Robert Dewar
2003-01-06 4:40 ` Andy Walker
2003-01-06 16:46 ` Michael S. Zick
2003-01-07 5:20 ` Andy Walker
2003-01-06 19:42 ` Tom Lord
2003-01-06 6:39 ` Andy Walker
2003-01-06 6:50 ` Daniel Berlin
2003-01-06 9:00 ` Andy Walker
2003-01-05 11:41 Robert Dewar
2003-01-05 16:30 ` Michael S. Zick
2003-01-06 4:53 ` Andy Walker
2003-01-06 19:50 ` Tom Lord
2003-01-06 6:29 ` Andy Walker
2003-01-06 21:53 ` Michael S. Zick
2003-01-07 6:02 ` Andy Walker
2003-01-07 17:41 ` Janis Johnson
2003-01-04 18:12 Robert Dewar
2003-01-04 14:50 Robert Dewar
2003-01-04 18:00 ` Denis Chertykov
2003-01-05 5:53 ` Andy Walker
2003-01-05 5:43 ` Andy Walker
2002-12-27 5:47 Chris Lattner
2002-12-29 0:35 ` Andy Walker
2002-12-29 5:58 ` Chris Lattner
2002-12-29 6:26 ` Alexandre Oliva
2002-12-29 12:04 ` Andy Walker
2002-12-29 13:58 ` Daniel Berlin
2002-12-29 22:41 ` Andy Walker
2002-12-29 15:50 ` Diego Novillo
2002-12-29 22:44 ` Andy Walker
2002-12-30 1:30 ` Zack Weinberg
2002-12-30 2:57 ` Andy Walker
2002-12-30 7:52 ` Michael S. Zick
2002-12-29 7:44 ` Daniel Egger
2002-12-29 12:10 ` Andy Walker
2002-12-30 20:58 ` James Mansion
2002-12-31 3:56 ` Michael S. Zick
2002-12-30 1:09 ` Michael S. Zick
2002-12-30 7:27 ` Daniel Egger
2002-12-30 10:25 ` Michael S. Zick
2002-12-30 20:50 ` Daniel Berlin
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