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Re: Use AVX/AVX512 selectively
- From: Alexander Monakov <amonakov at ispras dot ru>
- To: Florian Weimer <fw at deneb dot enyo dot de>
- Cc: Victor Rodriguez <vm dot rod25 at gmail dot com>, gcc-help <gcc-help at gcc dot gnu dot org>
- Date: Thu, 3 Mar 2016 17:37:44 +0300 (MSK)
- Subject: Re: Use AVX/AVX512 selectively
- Authentication-results: sourceware.org; auth=none
- References: <8760x6meb1 dot fsf at mid dot deneb dot enyo dot de> <CAK5mtexM6uRcw6WsRk+g=04xgKVLkx11PG5ffAWzs=y-=mNCBw at mail dot gmail dot com> <87twknd44v dot fsf at mid dot deneb dot enyo dot de>
On Thu, 3 Mar 2016, Florian Weimer wrote:
> Both hardware with amd without avx512f capability. There is run-time
> detection for it, but for it to be effective, most of the program has
> to be compiled without -mavx512f, otherwise the program will use
> avx512f instructions before getting to the detection code.
I think separate compilation is the proper tool for this. Your initial
message seems to imply you seek another method; why?
Thanks.
Alexander