libffi/testsuite/libffi.call/return_fl.c

   1 /* Area:        ffi_call
   2    Purpose:     Check return value float.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  <andreast@gcc.gnu.org> 20050212  */
   6
   7 /* { dg-do run } */
   8 #include "ffitest.h"
   9
  10 static float return_fl(float fl)
  11 {
  12   return 2 * fl;
  13 }
  14 int main (void)
  15 {
  16   ffi_cif cif;
  17   ffi_type *args[MAX_ARGS];
  18   void *values[MAX_ARGS];
  19   float fl, rfl;
  20
  21   args[0] = &ffi_type_float;
  22   values[0] = &fl;
  23
  24   /* Initialize the cif */
  25   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  26                      &ffi_type_float, args) == FFI_OK);
  27
  28   for (fl = -127.0; fl <  127; fl++)
  29     {
  30       ffi_call(&cif, FFI_FN(return_fl), &rfl, values);
  31       printf ("%f vs %f\n", rfl, return_fl(fl));
  32       CHECK(rfl ==  2 * fl);
  33     }
  34   exit(0);
  35 }