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From: "kretz at kde dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/99728] code pessimization when using wrapper classes around SIMD types
Date: Tue, 23 Mar 2021 14:32:09 +0000 [thread overview]
Message-ID: <bug-99728-4-ZcZzLgOtQV@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-99728-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99728
--- Comment #6 from Matthias Kretz (Vir) <kretz at kde dot org> ---
> I guess I need it for unaligned loads/stores, correct? Otherwise __v4df should work everywhere.
1. You can freely reinterpret_cast by value between all the different
[[gnu::vector_size(N)]] types (with equal N).
2. I use std::memcpy for loads and stores. Use __builtin_assume_aligned to get
aligned loads & stores.
next prev parent reply other threads:[~2021-03-23 14:32 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-23 13:22 [Bug c++/99728] New: " martin@mpa-garching.mpg.de
2021-03-23 13:23 ` [Bug c++/99728] " martin@mpa-garching.mpg.de
2021-03-23 13:50 ` martin@mpa-garching.mpg.de
2021-03-23 13:56 ` amonakov at gcc dot gnu.org
2021-03-23 14:08 ` kretz at kde dot org
2021-03-23 14:28 ` martin@mpa-garching.mpg.de
2021-03-23 14:32 ` kretz at kde dot org [this message]
2021-03-23 14:36 ` martin@mpa-garching.mpg.de
2021-03-23 15:00 ` redi at gcc dot gnu.org
2021-03-24 8:52 ` [Bug tree-optimization/99728] " rguenth at gcc dot gnu.org
2021-03-24 9:15 ` kretz at kde dot org
2021-03-24 9:26 ` rguenther at suse dot de
2021-07-02 8:27 ` martin@mpa-garching.mpg.de
2021-07-02 9:52 ` rguenth at gcc dot gnu.org
2021-07-02 9:52 ` rguenth at gcc dot gnu.org
2021-07-02 10:53 ` rguenth at gcc dot gnu.org
2021-07-02 11:55 ` rguenth at gcc dot gnu.org
2021-07-07 11:49 ` cvs-commit at gcc dot gnu.org
2021-07-07 12:09 ` rguenth at gcc dot gnu.org
2021-07-07 13:59 ` rguenth at gcc dot gnu.org
2021-07-14 11:37 ` rguenth at gcc dot gnu.org
2021-07-14 13:04 ` rguenth at gcc dot gnu.org
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