From: "Wilco Dijkstra" <wdijkstr@arm.com>
To: "'Andrew Pinski'" <pinskia@gmail.com>
Cc: "GCC Patches" <gcc-patches@gcc.gnu.org>
Subject: RE: [PATCH][AArch64] Make aarch64_min_divisions_for_recip_mul configurable
Date: Tue, 03 Mar 2015 19:08:00 -0000 [thread overview]
Message-ID: <000001d055e5$6c3e7a50$44bb6ef0$@com> (raw)
In-Reply-To: <CA+=Sn1nK3RE3fFM7xk0pUkTtbs312BAm=80_UMkVRRKVMk-6zw@mail.gmail.com>
> Andrew Pinski wrote:
> On Tue, Mar 3, 2015 at 10:06 AM, Wilco Dijkstra <wdijkstr@arm.com> wrote:
> > This patch makes aarch64_min_divisions_for_recip_mul configurable for float and double. This
> allows
> > CPUs with really fast or multiple dividers to return 3 (or even 4) if that happens to be
> faster
> > overall. No code generation change - bootstrap & regression OK.
>
> Are you planing on doing the optimization where you turn the divide
> into recip est followed by a few steps?
> Because if so then this should be changed to be handle that case too.
No I don't think that will be faster.
Wilco
next prev parent reply other threads:[~2015-03-03 19:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-03 18:06 Wilco Dijkstra
2015-03-03 18:34 ` Andrew Pinski
2015-03-03 19:08 ` Wilco Dijkstra [this message]
2015-04-27 13:43 Wilco Dijkstra
2015-05-01 7:44 ` Marcus Shawcroft
2015-05-01 11:26 ` Wilco Dijkstra
2015-05-01 12:17 ` Marcus Shawcroft
2015-05-01 13:12 ` Wilco Dijkstra
2015-05-01 13:20 ` Kyrill Tkachov
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