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* [Bug target/19780] Floating point computation far slower for -mfpmath=sse
[not found] <20050203162419.19780.uros@kss-loka.si>
@ 2005-06-19 14:56 ` pinskia at gcc dot gnu dot org
2005-06-19 15:03 ` pluto at agmk dot net
` (2 subsequent siblings)
3 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-06-19 14:56 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
GCC build triplet|i686-pc-linux-gnu |
GCC host triplet|i686-pc-linux-gnu |
Keywords| |missed-optimization
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19780
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/19780] Floating point computation far slower for -mfpmath=sse
[not found] <20050203162419.19780.uros@kss-loka.si>
2005-06-19 14:56 ` [Bug target/19780] Floating point computation far slower for -mfpmath=sse pinskia at gcc dot gnu dot org
@ 2005-06-19 15:03 ` pluto at agmk dot net
2005-09-29 4:06 ` [Bug rtl-optimization/19780] " pinskia at gcc dot gnu dot org
2005-09-29 4:07 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 4+ messages in thread
From: pluto at agmk dot net @ 2005-06-19 15:03 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |pluto at agmk dot net
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19780
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/19780] Floating point computation far slower for -mfpmath=sse
[not found] <20050203162419.19780.uros@kss-loka.si>
2005-06-19 14:56 ` [Bug target/19780] Floating point computation far slower for -mfpmath=sse pinskia at gcc dot gnu dot org
2005-06-19 15:03 ` pluto at agmk dot net
@ 2005-09-29 4:06 ` pinskia at gcc dot gnu dot org
2005-09-29 4:07 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-29 4:06 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-29 04:05 -------
Confirmed. This is weird and this is an ra issue. I don't understand why the ra is spilling it to the stack
as there are enough SSE registers to hold the 6 registers.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|target |rtl-optimization
Ever Confirmed| |1
GCC target triplet|i686-pc-linux-gnu |i686-*-*
Keywords| |ra
Last reconfirmed|0000-00-00 00:00:00 |2005-09-29 04:05:34
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19780
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/19780] Floating point computation far slower for -mfpmath=sse
[not found] <20050203162419.19780.uros@kss-loka.si>
` (2 preceding siblings ...)
2005-09-29 4:06 ` [Bug rtl-optimization/19780] " pinskia at gcc dot gnu dot org
@ 2005-09-29 4:07 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-29 4:07 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-29 04:06 -------
Oh, and this looks very related to two operand instructions issue.
PPC gives optimial code:
L2:
fmul f0,f6,f9
fmul f13,f7,f10
fmul f12,f8,f11
fmsub f29,f8,f10,f0
fmsub f30,f6,f11,f13
fmsub f31,f7,f9,f12
fmr f6,f10
fmr f7,f11
fmr f8,f9
fmr f10,f31
fmr f11,f29
fmr f9,f30
bdnz L2
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19780
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2005-09-29 4:07 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <20050203162419.19780.uros@kss-loka.si>
2005-06-19 14:56 ` [Bug target/19780] Floating point computation far slower for -mfpmath=sse pinskia at gcc dot gnu dot org
2005-06-19 15:03 ` pluto at agmk dot net
2005-09-29 4:06 ` [Bug rtl-optimization/19780] " pinskia at gcc dot gnu dot org
2005-09-29 4:07 ` pinskia at gcc dot gnu dot org
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