libffi/testsuite/libffi.call/return_dbl2.c

   1 /* Area:        ffi_call
   2    Purpose:     Check return value double.
   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 double return_dbl(double dbl1, double dbl2, unsigned int in3, double dbl4)
  11 {
  12   return dbl1 + dbl2 + in3 + dbl4;
  13 }
  14 int main (void)
  15 {
  16   ffi_cif cif;
  17   ffi_type *args[MAX_ARGS];
  18   void *values[MAX_ARGS];
  19   double dbl1, dbl2, dbl4, rdbl;
  20   unsigned int in3;
  21   args[0] = &ffi_type_double;
  22   args[1] = &ffi_type_double;
  23   args[2] = &ffi_type_uint;
  24   args[3] = &ffi_type_double;
  25   values[0] = &dbl1;
  26   values[1] = &dbl2;
  27   values[2] = &in3;
  28   values[3] = &dbl4;
  29
  30   /* Initialize the cif */
  31   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 4,
  32                      &ffi_type_double, args) == FFI_OK);
  33   dbl1 = 127.0;
  34   dbl2 = 128.0;
  35   in3 = 255;
  36   dbl4 = 512.7;
  37
  38   ffi_call(&cif, FFI_FN(return_dbl), &rdbl, values);
  39   printf ("%f vs %f\n", rdbl, return_dbl(dbl1, dbl2, in3, dbl4));
  40   CHECK(rdbl ==  dbl1 + dbl2 + in3 + dbl4);
  41   exit(0);
  42 }