gcc/testsuite/gcc.c-torture/execute/floatunsisf-1.c

   1 /* The fp-bit.c function __floatunsisf had a latent bug where guard bits
   2    could be lost leading to incorrect rounding.  */
   3 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   4
   5 extern void abort (void);
   6 extern void exit (int);
   7 #if __INT_MAX__ >= 0x7fffffff
   8 volatile unsigned u = 0x80000081;
   9 #else
  10 volatile unsigned long u = 0x80000081;
  11 #endif
  12 volatile float f1, f2;
  13 int
  14 main (void)
  15 {
  16   f1 = (float) u;
  17   f2 = (float) 0x80000081;
  18   if (f1 != f2)
  19     abort ();
  20   exit (0);
  21 }