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Re: [patch, fortran] Enable FMA for AVX2 and AVX512F for matmul

From: Jerry DeLisle <jvdelisle at charter dot net>
To: fortran at gcc dot gnu dot org
Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Wed, 1 Mar 2017 19:20:51 -0800
Subject: Re: [patch, fortran] Enable FMA for AVX2 and AVX512F for matmul
Authentication-results: sourceware.org; auth=none
References: <6ecdb93d-3aef-746c-8ca0-ed6b78eb12d4@netcologne.de>

On 03/01/2017 01:00 PM, Thomas Koenig wrote:

Hello world,

the attached patch enables FMA for the AVX2 and AVX512F variants of
matmul.  This should bring a very nice speedup (although I have
been unable to run benchmarks due to lack of a suitable machine).

Question: Is this still appropriate for the current state of trunk?
Or rather, OK for when gcc 8 opens (which might still be some time
in the future)?

I think it may be appropriate now because you are making an adjustment to thejust added new feature.

I would prefer that it was tested on the actual expected platform. Does anyoneanywhere on this list have access to one of these machines to test?


Jerry

Follow-Ups:
- Re: [patch, fortran] Enable FMA for AVX2 and AVX512F for matmul
  - From: Thomas Koenig

References:
- [patch, fortran] Enable FMA for AVX2 and AVX512F for matmul
  - From: Thomas Koenig

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