public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug target/103959] New: float64x1_t not using fmov to generate some float values
@ 2022-01-10 7:30 pinskia at gcc dot gnu.org
2023-11-12 21:56 ` [Bug target/103959] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-01-10 7:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103959
Bug ID: 103959
Summary: float64x1_t not using fmov to generate some float
values
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Target Milestone: ---
Target: aarch64-*-*
#include <arm_neon.h>
Take:
double ff(void)
{
return 2.0;
}
float64x1_t g(void)
{
return (float64x1_t){2.0};
}
---- CUT ----
These should produce the same code but currently does not.
ff:
fmov d0, 2.0e+0
ret
g:
mov x0, 4611686018427387904
fmov d0, x0
ret
I Noticed this while working on PR 64821 where we now fold sqrt but get g.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug target/103959] float64x1_t not using fmov to generate some float values
2022-01-10 7:30 [Bug target/103959] New: float64x1_t not using fmov to generate some float values pinskia at gcc dot gnu.org
@ 2023-11-12 21:56 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-12 21:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103959
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |pinskia at gcc dot gnu.org
Ever confirmed|0 |1
Last reconfirmed| |2023-11-12
Status|UNCONFIRMED |ASSIGNED
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Mine.
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2023-11-12 21:56 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-01-10 7:30 [Bug target/103959] New: float64x1_t not using fmov to generate some float values pinskia at gcc dot gnu.org
2023-11-12 21:56 ` [Bug target/103959] " pinskia 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).