Imported File#ftype spec from rubyspecs.
[rbx.git] / shotgun / external_libs / libffi / testsuite / libffi.call / float2.c
blobfa9dd311d69990fd0c9dccd4750ef3a89fcc8437
1 /* Area: ffi_call
2 Purpose: Check return value long double.
3 Limitations: none.
4 PR: none.
5 Originator: From the original ffitest.c */
7 /* { dg-do run } */
9 #include "ffitest.h"
10 #include "float.h"
12 static long double ldblit(float f)
14 return (long double) (((long double) f)/ (long double) 3.0);
17 int main (void)
19 ffi_cif cif;
20 ffi_type *args[MAX_ARGS];
21 void *values[MAX_ARGS];
22 float f;
23 long double ld;
25 args[0] = &ffi_type_float;
26 values[0] = &f;
28 /* Initialize the cif */
29 CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
30 &ffi_type_longdouble, args) == FFI_OK);
32 f = 3.14159;
34 #if 1
35 /* This is ifdef'd out for now. long double support under SunOS/gcc
36 is pretty much non-existent. You'll get the odd bus error in library
37 routines like printf(). */
38 printf ("%Lf\n", ldblit(f));
39 #endif
40 ld = 666;
41 ffi_call(&cif, FFI_FN(ldblit), &ld, values);
43 #if 1
44 /* This is ifdef'd out for now. long double support under SunOS/gcc
45 is pretty much non-existent. You'll get the odd bus error in library
46 routines like printf(). */
47 printf ("%Lf, %Lf, %Lf, %Lf\n", ld, ldblit(f), ld - ldblit(f), LDBL_EPSILON);
48 #endif
50 /* These are not always the same!! Check for a reasonable delta */
51 if (ld - ldblit(f) < LDBL_EPSILON)
52 puts("long double return value tests ok!");
53 else
54 CHECK(0);
56 exit(0);