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From: "fxcoudert at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/27561] [mingw32] floating-point extreme values are wrong
Date: Tue, 30 May 2006 15:06:00 -0000	[thread overview]
Message-ID: <20060530150554.8654.qmail@sourceware.org> (raw)
In-Reply-To: <bug-27561-10129@http.gcc.gnu.org/bugzilla/>



------- Comment #4 from fxcoudert at gcc dot gnu dot org  2006-05-30 15:05 -------
OK, I managed to reduce this to a GMP/MPFR bug on i386-pc-mingw32:

$ cat mpfr.c 
#include <stdio.h>
#include <gmp.h>
#include <mpfr.h>

int main (void)
{
  mpfr_t b;

  mpfr_init (b);
  mpfr_set_ui (b, 2, GMP_RNDN);
  mpfr_out_str (stdout, 10, 0, b, GMP_RNDN);
  fputs ("\n", stdout);
  mpfr_pow_si (b, b, -23, GMP_RNDN);
  mpfr_out_str (stdout, 10, 0, b, GMP_RNDN);
  fputs ("\n", stdout);
  return 0;
}
$ gcc mpfr.c -I$HOME/local/include -L$HOME/local/lib -lmpfr -lgmp && ./a.exe 
2.0000000000000000
0

while it should output (on i386-pc-linux):

$ gcc mpfr.c -lmpfr -lgmp && ./a.out
2.00000000000000
1.19209289550781e-7


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27561


  parent reply	other threads:[~2006-05-30 15:06 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-05-11 17:18 [Bug fortran/27561] New: i386-pc-mingw32 version incorrect error dir at lanl dot gov
2006-05-30 13:12 ` [Bug fortran/27561] [mingw32] floating-point extreme values are wrong fxcoudert at gcc dot gnu dot org
2006-05-30 13:17 ` fxcoudert at gcc dot gnu dot org
2006-05-30 13:59 ` fxcoudert at gcc dot gnu dot org
2006-05-30 15:06 ` fxcoudert at gcc dot gnu dot org [this message]
2006-05-30 16:34 ` dir at lanl dot gov
2006-05-30 17:01 ` dir at lanl dot gov
2006-05-31 12:54 ` fxcoudert at gcc dot gnu dot org

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