--- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-18
15:48 ---
I should note that -ffast-math enables -ffinite-math-only also.
--
What|Removed |Added
--- Additional Comments From uros at kss-loka dot si 2005-01-18 15:58
---
This patch unfortunatelly didn't help:
http://gcc.gnu.org/ml/gcc-cvs/2005-01/msg00651.html
With the patch, tracing abyss.pov generates these warnings:
Parsing.File: ../scenes/advanced/abyss.pov Line:
--- Additional Comments From uros at kss-loka dot si 2005-01-18 16:05
---
(In reply to comment #1)
> I should note that -ffast-math enables -ffinite-math-only also.
The same (bad) results could be achieved with -funsafe-math-optimizations.
--
http://gcc.gnu.org/bugzilla/show_bug.cg
--
What|Removed |Added
CC||kcook at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19506
--- Additional Comments From uros at kss-loka dot si 2005-01-19 08:17
---
This functionality is missing after FP compares rewrite:
==i386_old.md==
...
;; We can't represent the LT test directly. Do this by swapping the operands.
(define_split
[(set (match_operand:SF 0 "fp_register_
--
What|Removed |Added
CC||martin at mpa-garching dot
||mpg dot de
http://gcc.gnu.org/bugz
--- Additional Comments From uros at kss-loka dot si 2005-01-20 13:25
---
Adding ssemmx keyword, because this problem is triggered by -mfpmath=sse.
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What|Removed |Added
--- Additional Comments From rth at gcc dot gnu dot org 2005-01-20 19:12
---
(In reply to comment #4)
> This functionality is missing after FP compares rewrite...
No, it got moved to ix86_expand_fp_movcc.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19506
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What|Removed |Added
AssignedTo|unassigned at gcc dot gnu |rth at gcc dot gnu dot org
|dot org |
Status|UNCONFIRMED
--- Additional Comments From uros at kss-loka dot si 2005-01-21 06:48
---
I hope this analysis is of some help:
- the patch in comment #2 fixes the problem
- if bypass_code is cleared for (code == LT) in ix86_expand_branch() _and_
ix86_fp_comparison_fcomi_cost() the problem shows again.
--- Additional Comments From uros at kss-loka dot si 2005-01-21 12:51
---
Similar problems as described in comment #2 happens for -mfpmath=sse -mno-80387.
However, a patch at http://gcc.gnu.org/ml/gcc-patches/2005-01/msg01464.html is
needed, otherwise compilation fails.
--
http://gcc
--- Additional Comments From rth at gcc dot gnu dot org 2005-01-21 22:03
---
I've found the problem, via binary search on the povray source and then
visual inspection of the file found to be miscompiled. The mov[sd]fcc_1_sse
patterns are missing an earlyclobber. The fix isn't quite as
--- Additional Comments From uros at kss-loka dot si 2005-01-22 11:34
---
Should patch to sse_comparison_operator
(http://gcc.gnu.org/ml/gcc-patches/2005-01/msg01087.html) be reverted in this
case? It didn't fix the problem, and according to comment #9 the problem is not
in this area.
--- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-01-22
23:08 ---
Subject: Bug 19506
CVSROOT:/cvs/gcc
Module name:gcc
Changes by: [EMAIL PROTECTED] 2005-01-22 23:07:57
Modified files:
gcc: ChangeLog
gcc/config/i386: i
--- Additional Comments From rth at gcc dot gnu dot org 2005-01-22 23:23
---
(In reply to comment #10)
> Should patch to sse_comparison_operator [...] be reverted in this case?
Nah. As I said in that message, allowing these operators in this manner
doesn't actually give the register al
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