From: Jakub Jelinek <jakub@redhat.com>
To: Stefan Kanthak <stefan.kanthak@nexgo.de>
Cc: Jonathan Wakely <jwakely.gcc@gmail.com>,
gcc@gnu.org, Andrew Pinski <pinskia@gmail.com>
Subject: Re: Will GCC eventually support SSE2 or SSE4.1?
Date: Fri, 26 May 2023 11:22:10 +0200 [thread overview]
Message-ID: <ZHB6Qtn4RujimEi2@tucnak> (raw)
In-Reply-To: <4BD5D8BA8E0F45098CC3E2B188A216E6@H270>
On Fri, May 26, 2023 at 10:59:03AM +0200, Stefan Kanthak wrote:
> 3) SSE4.1 is supported since Core2, but -march=core2 fails to enable it.
> That's bad, REALITY CHECK, please!
You're wrong.
SSE4.1 first appeared in the 45nm versions of Core2, the 65nm versions
didn't have it.
The supported CPU names don't distinguish between core2 submodels,
so if you have core2 with sse4.1, you should either be using -march=native
if compiling on such a machine, or use -march=core2 -msse4.1,
there is no -march={conroe,allendale,wolfdale,merom,penryn,...}.
>
> 4) If the documenation is right, then the behaviour of GCC is wrong: it
> doesn't allow to use SSE4.1 without SSE4.2!
If you aren't able to read the documentation, it is hard to argue.
Jakub
next prev parent reply other threads:[~2023-05-26 9:22 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-26 6:46 Stefan Kanthak
2023-05-26 7:00 ` Andrew Pinski
2023-05-26 7:30 ` Jonathan Wakely
2023-05-26 7:58 ` Stefan Kanthak
2023-05-26 8:16 ` Sam James
2023-05-26 8:28 ` Jonathan Wakely
2023-05-26 8:59 ` Stefan Kanthak
2023-05-26 9:22 ` Jakub Jelinek [this message]
2023-05-26 11:28 ` Stefan Kanthak
2023-05-26 11:42 ` Jonathan Wakely
2023-05-26 12:03 ` Stefan Kanthak
2023-05-26 12:16 ` Jonathan Wakely
2023-05-26 12:22 ` Stefan Kanthak
2023-05-26 13:00 ` Mark Wielaard
2023-05-26 12:23 ` Jonathan Wakely
2023-05-26 11:36 ` Stefan Kanthak
2023-05-26 11:45 ` Jonathan Wakely
2023-05-26 12:19 ` Stefan Kanthak
2023-05-26 12:30 ` Jonathan Wakely
2023-05-26 12:42 ` Stefan Kanthak
2023-05-26 13:33 ` Nicholas Vinson
2023-05-26 12:37 ` Jakub Jelinek
2023-05-26 13:49 ` Stefan Kanthak
2023-05-26 14:07 ` Jonathan Wakely
2023-05-26 14:18 ` Jakub Jelinek
2023-05-26 14:41 ` Stefan Kanthak
2023-05-26 14:55 ` Jonathan Wakely
2023-05-26 15:07 ` Stefan Kanthak
2023-05-26 14:26 ` Stefan Kanthak
2023-05-26 14:58 ` Jonathan Wakely
2023-05-26 15:49 ` Stefan Kanthak
2023-05-26 16:44 ` David Brown
2023-05-27 18:16 ` Will GCC eventually support correct code compilation? Dave Blanchard
2023-05-27 18:59 ` Jason Merrill
2023-05-28 11:50 ` David Brown
2023-05-26 9:22 ` Will GCC eventually support SSE2 or SSE4.1? Jonathan Wakely
2023-05-26 8:12 ` Hagen Paul Pfeifer
2023-05-26 9:51 ` Jonathan Wakely
2023-05-26 11:34 ` Nicholas Vinson
2023-05-26 15:10 ` LIU Hao
2023-05-26 15:40 ` Stefan Kanthak
2023-05-27 18:20 ` LIU Hao
2023-05-27 18:49 ` Stefan Kanthak
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