gcc/testsuite/gcc.dg/dfp/union-init.c

   1 /* Cast to union is a GNU C extension.  */
   2
   3 #include "dfp-dbg.h"
   4
   5 union u
   6 {
   7   _Decimal128 d128;
   8   double d;
   9 };
  10
  11 union n
  12 {
  13   double d;
  14   _Decimal64 d64;
  15 };
  16
  17 int main ()
  18 {
  19   static union u u1 = { 0.0dl };
  20   static union u u2 = { 4.2dl };
  21   static union u u4 = { 0.0 };
  22
  23   static union n n1 = { 2.2dd };
  24   static union n n2 = { 3.25 };
  25
  26   _Decimal128 d128;
  27   _Decimal64 d64;
  28   double d;
  29
  30   if (u1.d128 != 0.0dl)
  31     FAILURE
  32
  33   if (u2.d128 != 4.2dl)
  34     FAILURE
  35
  36   /* cast decimal floating point to union type.  */
  37   d128 = 1.23dl;
  38   d64 = 4.56dd;
  39   d = 3.25;
  40
  41   u4 = (union u) d128;
  42   if (u4.d128 != 1.23dl)
  43     FAILURE
  44
  45   u4 = (union u) d;
  46   if (u4.d != 3.25)
  47     FAILURE
  48
  49   n1 = (union n) d64;
  50   if (n1.d64 != 4.56dd)
  51     FAILURE
  52
  53   n1 = (union n)d;
  54   if (n1.d != 3.25)
  55     FAILURE
  56
  57   FINISH
  58 }