libffi/testsuite/libffi.call/return_fl2.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 /* Use volatile float to avoid false negative on ix86.  See PR target/323.  */
  11 static float return_fl(float fl1, float fl2, float fl3, float fl4)
  12 {
  13   volatile float sum;
  14
  15   sum = fl1 + fl2 + fl3 + fl4;
  16   return sum;
  17 }
  18 int main (void)
  19 {
  20   ffi_cif cif;
  21   ffi_type *args[MAX_ARGS];
  22   void *values[MAX_ARGS];
  23   float fl1, fl2, fl3, fl4, rfl;
  24   volatile float sum;
  25
  26   args[0] = &ffi_type_float;
  27   args[1] = &ffi_type_float;
  28   args[2] = &ffi_type_float;
  29   args[3] = &ffi_type_float;
  30   values[0] = &fl1;
  31   values[1] = &fl2;
  32   values[2] = &fl3;
  33   values[3] = &fl4;
  34
  35   /* Initialize the cif */
  36   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 4,
  37                      &ffi_type_float, args) == FFI_OK);
  38   fl1 = 127.0;
  39   fl2 = 128.0;
  40   fl3 = 255.1;
  41   fl4 = 512.7;
  42
  43   ffi_call(&cif, FFI_FN(return_fl), &rfl, values);
  44   printf ("%f vs %f\n", rfl, return_fl(fl1, fl2, fl3, fl4));
  45
  46   sum = fl1 + fl2 + fl3 + fl4;
  47   CHECK(rfl == sum);
  48   exit(0);
  49 }