gcc/testsuite/gcc.target/powerpc/pr110011.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target float128_runtime } */
   3 /* Force long double to be with IBM format here, to verify
   4    _Float128 constant still uses its own format (IEEE) for
   5    encoding rather than IBM format.  */
   6 /* { dg-options "-mfp-in-toc -mabi=ibmlongdouble" } */
   7 /* { dg-add-options float128 } */
   8
   9 #define MPFR_FLOAT128_MAX 0x1.ffffffffffffffffffffffffffffp+16383f128
  10
  11 __attribute__ ((noipa))
  12 _Float128 f128_max ()
  13 {
  14   return MPFR_FLOAT128_MAX;
  15 }
  16
  17 typedef union
  18 {
  19   int w[4];
  20   _Float128 f128;
  21 } U;
  22
  23 int main ()
  24 {
  25
  26   U umax;
  27   umax.f128 = f128_max ();
  28   /* ieee float128 max:
  29      7ffeffff ffffffff ffffffff ffffffff.  */
  30   if (umax.w[1] != 0xffffffff || umax.w[2] != 0xffffffff)
  31     __builtin_abort ();
  32 #ifdef __LITTLE_ENDIAN__
  33   if (umax.w[0] != 0xffffffff || umax.w[3] != 0x7ffeffff)
  34     __builtin_abort ();
  35 #else
  36   if (umax.w[3] != 0xffffffff || umax.w[0] != 0x7ffeffff)
  37     __builtin_abort ();
  38 #endif
  39
  40   return 0;
  41 }
  42