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 dbl)
      11  {
      12    printf ("%f\n", dbl);
      13    return 2 * dbl;
      14  }
      15  int main (void)
      16  {
      17    ffi_cif cif;
      18    ffi_type *args[MAX_ARGS];
      19    void *values[MAX_ARGS];
      20    double dbl, rdbl;
      21  
      22    args[0] = &ffi_type_double;
      23    values[0] = &dbl;
      24  
      25    /* Initialize the cif */
      26    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
      27  		     &ffi_type_double, args) == FFI_OK);
      28  
      29    for (dbl = -127.3; dbl <  127; dbl++)
      30      {
      31        ffi_call(&cif, FFI_FN(return_dbl), &rdbl, values);
      32        printf ("%f vs %f\n", rdbl, return_dbl(dbl));
      33        CHECK(rdbl == 2 * dbl);
      34      }
      35    exit(0);
      36  }