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* middle-end/6205: -O -fpmath=sse breaks visibility of register accumulated sum
@ 2002-04-06 7:16 tprince
0 siblings, 0 replies; 2+ messages in thread
From: tprince @ 2002-04-06 7:16 UTC (permalink / raw)
To: gcc-gnats
>Number: 6205
>Category: middle-end
>Synopsis: -O -fpmath=sse breaks visibility of register accumulated sum
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sat Apr 06 07:16:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Tim Prince
>Release: 3.1
>Organization:
>Environment:
linux-SuSE 7.3 or cygwin/2K
>Description:
result of a float sum in SSE register is seen as NaN in certain contexts, when built with -O -mfpmath=sse
Problem originally seen in larger examples in g77; case available on request.
>How-To-Repeat:
gcc -O -march=pentium3 -mfpmath=sse badsum.c
./a.out
result seen as nan in printf(), but is OK if -O or -mfpmath options are removed
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: middle-end/6205: -O -fpmath=sse breaks visibility of register accumulated sum
@ 2002-05-28 5:51 hubicka
0 siblings, 0 replies; 2+ messages in thread
From: hubicka @ 2002-05-28 5:51 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, nobody, tprince
Synopsis: -O -fpmath=sse breaks visibility of register accumulated sum
State-Changed-From-To: open->closed
State-Changed-By: hubicka
State-Changed-When: Tue May 28 05:49:37 2002
State-Changed-Why:
Fixed by Jakub and me for both mainline and 3.1 branch
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6205
^ permalink raw reply [flat|nested] 2+ messages in thread
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2002-04-06 7:16 middle-end/6205: -O -fpmath=sse breaks visibility of register accumulated sum tprince
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