2 Purpose: Check return value double.
5 Originator: From the original ffitest.c */
14 unsigned char c[sizeof (double)];
19 static double dblit(float f)
27 ffi_type *args[MAX_ARGS];
28 void *values[MAX_ARGS];
33 args[0] = &ffi_type_float;
36 /* Initialize the cif */
37 CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
38 &ffi_type_double, args) == FFI_OK);
42 /* Put a canary in the return array. This is a regression test for
44 memset(result[1].c, CANARY, sizeof (double));
46 ffi_call(&cif, FFI_FN(dblit), &result[0].d, values);
48 /* These are not always the same!! Check for a reasonable delta */
50 CHECK(result[0].d - dblit(f) < DBL_EPSILON);
52 /* Check the canary. */
53 for (i = 0; i < sizeof (double); ++i)
54 CHECK(result[1].c[i] == CANARY);