[Bug classpath/28096] parseFloat and parseDouble faulty on small numbers.

[aph at gcc dot gnu dot org]

------- Comment #7 from aph at gcc dot gnu dot org  2006-09-09 17:19 -------
It's definitely being miscompiled.  Here's a test case:

#include <stdio.h>
#include "/mnt/zebedee/gcc/trunk/libjava/classpath/native/fdlibm/mprec.h"

int main ()
{
  const char *s = "5e-324";
  struct _Jv_reent poo;
  memset (&poo, 0, sizeof poo);
  char *se;
  double d = _strtod_r (&poo, s, &se);
  fprintf(stdout, "%g\n", d);
  return 0;
}

$ /local/install/bin/gcc p.c -I/mnt/zebedee/gcc/trunk/libjava/inlcude
-I/mnt/zebedee/gcc/trunk/libjava/classpath/native/
-I/local/trunk/obj-i686-pc-linux-gnu/i686-pc-linux-gnu/libjava/include/
-I/local/trunk/obj-i686-pc-linux-gnu/i686-pc-linux-gnu/libjava/classpath/include
-lgcj
 $ LD_LIBRARY_PATH=/local/install/lib ./a.out
-1.061e-314 

Recompile strtod at -O1 and it's fine:

 $ /local/install/bin/gcc p.c -I/mnt/zebedee/gcc/trunk/libjava/inlcude
-I/mnt/zebedee/gcc/trunk/libjava/classpath/native/
-I/local/trunk/obj-i686-pc-linux-gnu/i686-pc-linux-gnu/libjava/include/
-I/local/trunk/obj-i686-pc-linux-gnu/i686-pc-linux-gnu/libjava/classpath/include
-lgcj /home/aph/gcc/trunk/libjava/classpath/native/fdlibm/strtod.c -O1
 $ LD_LIBRARY_PATH=/local/install/lib ./a.out
4.94066e-324


-- 

aph at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2006-06-21 14:22:34         |2006-09-09 17:19:57
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28096