public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug target/111733] New: Emit inline SVE FSCALE instruction for ldexp
@ 2023-10-09  9:53 ktkachov at gcc dot gnu.org
  0 siblings, 0 replies; only message in thread
From: ktkachov at gcc dot gnu.org @ 2023-10-09  9:53 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111733

            Bug ID: 111733
           Summary: Emit inline SVE FSCALE instruction for ldexp
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ktkachov at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64

Having noticed https://github.com/llvm/llvm-project/pull/67552 in LLVM GCC
should be able to emit the SVE fscale instruction [1] to implement the ldexp
standard function.

There is already an ldexpm3 optab defined so it should be a relatively simple
matter of wiring up the expander for TARGET_SVE

[1]
https://developer.arm.com/documentation/ddi0596/2021-12/SVE-Instructions/FSCALE--Floating-point-adjust-exponent-by-vector--predicated--?lang=en

^ permalink raw reply	[flat|nested] only message in thread
only message in thread, other threads:[~2023-10-09  9:53 UTC | newest]

Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-10-09  9:53 [Bug target/111733] New: Emit inline SVE FSCALE instruction for ldexp ktkachov at gcc dot gnu.org

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).