From: Colin Paul Gloster <Colin_Paul_Gloster@ACM.org>
Subject: Re: small example, using complex variables in Ada
Date: Thu, 17 Jun 2010 11:33:05 +0100
Date: 2010-06-17T11:33:05+01:00 [thread overview]
Message-ID: <alpine.LRH.2.00.1006171132150.27957@64bit-RedHat-Enterprise-Linux6beta> (raw)
In-Reply-To: <4c1016f3-ff7b-456f-b0e2-0a79985ebc9e@b35g2000yqi.googlegroups.com>
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On Thu, 17 Jun 2010, Gautier sent:
|--------------------------------------------------------------------|
|"On Jun 10, 5:48 pm, Colin Paul Gloster <Colin_Paul_Glos...@ACM.org>|
|wrote: |
| |
|> Additionally, loop unrolling should be considered. |
| |
|Just a note for those who are not aware of and who'd be tempted to |
|unroll loops by hand: compilers are able to unroll loops themselves.|
|For instance GNAT has a -funroll-loops for a long time (and also - |
|fpeel-loops and -funswitch-loops)." |
|--------------------------------------------------------------------|
It is possible to obtain better performance by both manually unrolling
and having a compiler unroll for you at the same, instead of by
relying on just a compiler or just manual unrolling. See for example
"Computer Architecture: A Quantitative Approach" (in which manual
unrolling was called "symbolic loop unrolling").
Sincerely,
Colin Paul Gloster
next prev parent reply other threads:[~2010-06-17 10:33 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-09 10:49 small example, using complex variables in Ada Nasser M. Abbasi
2010-06-09 11:26 ` Ludovic Brenta
2010-06-09 23:50 ` Jerry
2010-06-10 1:03 ` Jeffrey R. Carter
2010-06-10 15:48 ` Colin Paul Gloster
2010-06-10 14:54 ` Ludovic Brenta
2010-06-10 16:21 ` Colin Paul Gloster
2010-06-10 17:37 ` Adam Beneschan
2010-06-10 17:57 ` Jeffrey R. Carter
2010-06-10 22:32 ` Randy Brukardt
2010-06-11 12:42 ` Colin Paul Gloster
2010-06-11 18:59 ` Randy Brukardt
2010-06-14 19:19 ` Colin Paul Gloster
2010-06-14 19:48 ` Nasser M. Abbasi
2010-06-17 7:44 ` Gautier write-only
2010-06-17 10:33 ` Colin Paul Gloster [this message]
2010-06-17 14:39 ` Yannick Duchêne (Hibou57)
2010-06-17 16:36 ` Colin Paul Gloster
2010-06-09 12:43 ` Niklas Holsti
2010-06-10 7:23 ` Stephen Leake
2010-06-10 9:12 ` J-P. Rosen
2010-06-10 11:03 ` Yannick Duchêne (Hibou57)
2010-06-10 13:27 ` J-P. Rosen
2010-06-10 21:15 ` Yannick Duchêne (Hibou57)
2010-06-11 7:22 ` Dmitry A. Kazakov
2010-06-11 8:48 ` J-P. Rosen
2010-06-11 12:00 ` Brian Drummond
2010-06-10 9:34 ` Nasser M. Abbasi
2010-06-10 20:12 ` Simon Wright
2010-06-14 9:33 ` Vincent LAFAGE
2010-06-14 12:29 ` Nasser M. Abbasi
2010-06-14 13:00 ` Vincent LAFAGE
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