gcc/testsuite/gcc.c-torture/execute/ieee/20010226-1.c

   1 #include <float.h>
   2
   3 long double dfrom = 1.1;
   4 long double m1;
   5 long double m2;
   6 unsigned long mant_long;
   7
   8 int main()
   9 {
  10   /* Some targets don't support a conforming long double type.  This is
  11      common with very small parts which set long double == float.   Look
  12      to see if the type has at least 32 bits of precision.  */
  13   if (LDBL_EPSILON > 0x1p-31L)
  14     return 0;
  15
  16   m1 = dfrom / 2.0;
  17   m2 = m1 * 4294967296.0;
  18   mant_long = ((unsigned long) m2) & 0xffffffff;
  19
  20   if (mant_long == 0x8ccccccc)
  21     return 0;
  22   else
  23     abort();
  24 }