gcc/testsuite/gcc.target/i386/pr36578-2.c

   1 /* Test for unsafe floating-point conversions.  */
   2 /* { dg-do run } */
   3 /* { dg-options "-msse2 -mfpmath=sse" } */
   4 /* { dg-require-effective-target sse2 } */
   5
   6 #include "sse2-check.h"
   7
   8 extern void abort (void);
   9 extern void exit (int);
  10 extern int printf(const char *, ...);
  11
  12 volatile double d1 = 0x1.000001p0;
  13 volatile double d2 = 0x1p-54;
  14 volatile double d2d = 0x1p-52;
  15 volatile float f = 0x1.000002p0f;
  16 volatile float f2;
  17
  18 static void
  19 sse2_test (void)
  20 {
  21   if (sizeof(long double) > sizeof(double)  ) {
  22         f2 = (float)((long double)d1 + (long double)d2);
  23   } else {
  24         f2 = (float)((long double)d1 + (long double)d2d);
  25   }
  26   if (f != f2)
  27     abort ();
  28   exit (0);
  29 }