Re: MMX/3Dnow!/SSE/SSE2 compilers

dave@icmfp.com
29 Apr 2002 01:51:21 -0400

          From comp.compilers
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From: dave@icmfp.com
Newsgroups: comp.compilers
Date: 29 Apr 2002 01:51:21 -0400
Organization: ntl Cablemodem News Service
References: 02-04-126 02-04-137 02-04-146
Keywords: code, GCC
Posted-Date: 29 Apr 2002 01:51:20 EDT

>>> What compilers support any of the MMX/3Dnow!/SSE/SSE2 instruction sets
>>> (and optimize code for them)? Do you know of any published
>>> comparisons of such compilers?


> The upcomming GCC 3.1 (The extensions was developed for x86-64 by Suse
> and AMD) and of course Intel's icc


Is there any documentation on what GCC will be able to do in this
respect? I have heard many reports of automatic vectorization
support, and have used some (very old) patches which added automatic
use of MMX instructions and registers, but the performance increase
was minimal due to the poor code generated. Have things improved a
lot since then?


Dave

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