public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "zhongyunde at huawei dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/112306] New: [AArch64][neon] incorrect combine the (a -1)* b into fnmsub for fixed vector type Date: Tue, 31 Oct 2023 07:26:14 +0000 [thread overview] Message-ID: <bug-112306-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112306 Bug ID: 112306 Summary: [AArch64][neon] incorrect combine the (a -1)* b into fnmsub for fixed vector type Product: gcc Version: 13.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: zhongyunde at huawei dot com Target Milestone: --- * test: https://gcc.godbolt.org/z/sr6Mevf9G ``` float32x4_t test2_float_vec (float32x4_t a, float32x4_t b) { return -b + a * b; } ``` * it seems not right for gcc to generate the a single **fnmsub s0, s0, s1, s1**, because the variables of a and b are vector type, while the output use a scalar float type registers ?
next reply other threads:[~2023-10-31 7:26 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-10-31 7:26 zhongyunde at huawei dot com [this message] 2023-10-31 7:28 ` [Bug target/112306] " pinskia at gcc dot gnu.org 2023-10-31 7:29 ` pinskia at gcc dot gnu.org 2023-10-31 7:30 ` pinskia at gcc dot gnu.org
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-112306-4@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).