gcc/testsuite/gcc.target/i386/pr36578-1.c

   1 /* Test for unsafe floating-point conversions.  PR 36578.  */
   2 /* { dg-do run } */
   3 /* { dg-options "-msse2 -mfpmath=sse" } */
   4 /* { dg-require-effective-target sse2 } */
   5 /* { dg-require-effective-target large_long_double } */
   6
   7 #include "sse2-check.h"
   8
   9 extern void abort (void);
  10 extern void exit (int);
  11 extern int printf(const char *, ...);
  12
  13 volatile double d1 = 1.0;
  14 volatile double d2 = 0x1.00001p-53;
  15 volatile double d3;
  16
  17 static void
  18 sse2_test (void)
  19 {
  20   d3 = (double)((long double)d1 + (long double)d2);
  21   if (d3 != d1)
  22     abort ();
  23   exit (0);
  24 }