1*1fd5a2e1SPrashanth Swaminathan /* Area: ffi_call
2*1fd5a2e1SPrashanth Swaminathan Purpose: Check return value long double.
3*1fd5a2e1SPrashanth Swaminathan Limitations: none.
4*1fd5a2e1SPrashanth Swaminathan PR: none.
5*1fd5a2e1SPrashanth Swaminathan Originator: From the original ffitest.c */
6*1fd5a2e1SPrashanth Swaminathan /* { dg-do run } */
7*1fd5a2e1SPrashanth Swaminathan
8*1fd5a2e1SPrashanth Swaminathan #include "ffitest.h"
9*1fd5a2e1SPrashanth Swaminathan #include "float.h"
10*1fd5a2e1SPrashanth Swaminathan
11*1fd5a2e1SPrashanth Swaminathan #include <math.h>
12*1fd5a2e1SPrashanth Swaminathan
ldblit(float f)13*1fd5a2e1SPrashanth Swaminathan static long double ldblit(float f)
14*1fd5a2e1SPrashanth Swaminathan {
15*1fd5a2e1SPrashanth Swaminathan return (long double) (((long double) f)/ (long double) 3.0);
16*1fd5a2e1SPrashanth Swaminathan }
17*1fd5a2e1SPrashanth Swaminathan
main(void)18*1fd5a2e1SPrashanth Swaminathan int main (void)
19*1fd5a2e1SPrashanth Swaminathan {
20*1fd5a2e1SPrashanth Swaminathan ffi_cif cif;
21*1fd5a2e1SPrashanth Swaminathan ffi_type *args[MAX_ARGS];
22*1fd5a2e1SPrashanth Swaminathan void *values[MAX_ARGS];
23*1fd5a2e1SPrashanth Swaminathan float f;
24*1fd5a2e1SPrashanth Swaminathan long double ld;
25*1fd5a2e1SPrashanth Swaminathan long double original;
26*1fd5a2e1SPrashanth Swaminathan
27*1fd5a2e1SPrashanth Swaminathan args[0] = &ffi_type_float;
28*1fd5a2e1SPrashanth Swaminathan values[0] = &f;
29*1fd5a2e1SPrashanth Swaminathan
30*1fd5a2e1SPrashanth Swaminathan /* Initialize the cif */
31*1fd5a2e1SPrashanth Swaminathan CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
32*1fd5a2e1SPrashanth Swaminathan &ffi_type_longdouble, args) == FFI_OK);
33*1fd5a2e1SPrashanth Swaminathan
34*1fd5a2e1SPrashanth Swaminathan f = 3.14159;
35*1fd5a2e1SPrashanth Swaminathan
36*1fd5a2e1SPrashanth Swaminathan #if defined(__sun) && defined(__GNUC__)
37*1fd5a2e1SPrashanth Swaminathan /* long double support under SunOS/gcc is pretty much non-existent.
38*1fd5a2e1SPrashanth Swaminathan You'll get the odd bus error in library routines like printf() */
39*1fd5a2e1SPrashanth Swaminathan #else
40*1fd5a2e1SPrashanth Swaminathan printf ("%Lf\n", ldblit(f));
41*1fd5a2e1SPrashanth Swaminathan #endif
42*1fd5a2e1SPrashanth Swaminathan
43*1fd5a2e1SPrashanth Swaminathan ld = 666;
44*1fd5a2e1SPrashanth Swaminathan ffi_call(&cif, FFI_FN(ldblit), &ld, values);
45*1fd5a2e1SPrashanth Swaminathan
46*1fd5a2e1SPrashanth Swaminathan #if defined(__sun) && defined(__GNUC__)
47*1fd5a2e1SPrashanth Swaminathan /* long double support under SunOS/gcc is pretty much non-existent.
48*1fd5a2e1SPrashanth Swaminathan You'll get the odd bus error in library routines like printf() */
49*1fd5a2e1SPrashanth Swaminathan #else
50*1fd5a2e1SPrashanth Swaminathan printf ("%Lf, %Lf, %Lf, %Lf\n", ld, ldblit(f), ld - ldblit(f), LDBL_EPSILON);
51*1fd5a2e1SPrashanth Swaminathan #endif
52*1fd5a2e1SPrashanth Swaminathan
53*1fd5a2e1SPrashanth Swaminathan /* These are not always the same!! Check for a reasonable delta */
54*1fd5a2e1SPrashanth Swaminathan original = ldblit(f);
55*1fd5a2e1SPrashanth Swaminathan if (((ld > original) ? (ld - original) : (original - ld)) < LDBL_EPSILON)
56*1fd5a2e1SPrashanth Swaminathan puts("long double return value tests ok!");
57*1fd5a2e1SPrashanth Swaminathan else
58*1fd5a2e1SPrashanth Swaminathan CHECK(0);
59*1fd5a2e1SPrashanth Swaminathan
60*1fd5a2e1SPrashanth Swaminathan exit(0);
61*1fd5a2e1SPrashanth Swaminathan }
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