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* Re: c/7762: cast problem with gcc-3.2 on x86 architectures
@ 2002-10-10 11:49 hubicka
0 siblings, 0 replies; 2+ messages in thread
From: hubicka @ 2002-10-10 11:49 UTC (permalink / raw)
To: bfkelly, gcc-bugs, gcc-prs, nobody
Synopsis: cast problem with gcc-3.2 on x86 architectures
State-Changed-From-To: open->closed
State-Changed-By: hubicka
State-Changed-When: Thu Oct 10 11:49:13 2002
State-Changed-Why:
This is double rouding due to higher precision of x87 registers. It is valid according to c99
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7762
^ permalink raw reply [flat|nested] 2+ messages in thread
* c/7762: cast problem with gcc-3.2 on x86 architectures
@ 2002-08-29 12:46 bfkelly
0 siblings, 0 replies; 2+ messages in thread
From: bfkelly @ 2002-08-29 12:46 UTC (permalink / raw)
To: gcc-gnats
>Number: 7762
>Category: c
>Synopsis: cast problem with gcc-3.2 on x86 architectures
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Thu Aug 29 11:16:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: bfkelly@nsa.gov
>Release: gcc-3.2
>Organization:
>Environment:
% uname -a
Linux catalina 2.4.9-21smp #1 SMP Thu Jan 17 14:01:48 EST 2002 \
i686 unknown
%
% gcc -v
Reading specs from /u/bfkelly/public/gcc-3.2/Linux-x86/lib/gcc-lib/\
i686-pc-linux-gnu/3.2/specs
Configured with: ../gcc-3.2/configure --enable-languages=c \
--prefix=/u/bfkelly/public/gcc-3.2/Linux-x86
Thread model: posix
gcc version 3.2
%
>Description:
/*
Demonstrates a cast problem with gcc-3.2 on
i686-pc-linux-gnu
i386-pc-solaris2.8
but not on other systems tried (SunOS-sparc, OSF1, etc.)
% uname -a
Linux catalina 2.4.9-21smp #1 SMP Thu Jan 17 14:01:48 EST 2002 \
i686 unknown
%
% gcc -v
Reading specs from /u/bfkelly/public/gcc-3.2/Linux-x86/lib/gcc-lib/\
i686-pc-linux-gnu/3.2/specs
Configured with: ../gcc-3.2/configure --enable-languages=c \
--prefix=/u/bfkelly/public/gcc-3.2/Linux-x86
Thread model: posix
gcc version 3.2
%
% gcc -o foo foo.c
% foo
960.000000
960
960.000000
959 ????
%
*/
#include <stdio.h>
int
main()
{
int n = 128000;
printf ("%f\n", 128000 * 0.0075);
printf ("%d\n", (int) (128000 * 0.0075));
printf ("%f\n", n * 0.0075);
printf ("%d\n", (int) (n * 0.0075));
return(0);
}
>How-To-Repeat:
% gcc -o foo foo.c
% foo
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
^ permalink raw reply [flat|nested] 2+ messages in thread
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2002-10-10 11:49 c/7762: cast problem with gcc-3.2 on x86 architectures hubicka
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2002-08-29 12:46 bfkelly
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