From: Andrew Stubbs <ams@codesourcery.com>
To: Tamar Christina <Tamar.Christina@arm.com>,
GCC Development <gcc@gcc.gnu.org>
Subject: Re: Complex multiply optimization working?
Date: Mon, 11 Apr 2022 13:51:59 +0100 [thread overview]
Message-ID: <90b263d0-e483-72d5-65e6-3d15f1c63d45@codesourcery.com> (raw)
In-Reply-To: <VI1PR08MB532594A403817228E5020C42FFEA9@VI1PR08MB5325.eurprd08.prod.outlook.com>
On 11/04/2022 13:03, Tamar Christina wrote:
> They work fine in both GCC 11 and HEAD https://godbolt.org/z/Mxxz6qWbP
> Did you actually enable the instructions?
Yes, as I said it uses the instructions, just not fully vectorized.
Anyway, the problem was I needed -ffast-math to skip the NaN checks.
> There are both SLP and LOOP variants in the testsuite. All the patterns are inside of a loop
> The mul tests are generated from https://github.com/gcc-mirror/gcc/blob/master/gcc/testsuite/gcc.dg/vect/complex/complex-mul-template.c
>
> Where the tests that use of this template instructs the vectorizer to unroll some cases
> and others they're kept as a loop. So both are tested in the testsuite.
Thanks. This is helpful. My grep skills clearly need work.
Andrew
prev parent reply other threads:[~2022-04-11 12:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-11 11:19 Andrew Stubbs
2022-04-11 12:02 ` Richard Biener
2022-04-11 12:47 ` Andrew Stubbs
2022-04-11 12:03 ` Tamar Christina
2022-04-11 12:51 ` Andrew Stubbs [this message]
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