Viewing file:  float2.c (1.43 KB) -rw-rw-r--
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/* Area: ffi_call
Purpose: Check return value long double.
Limitations: none.
PR: none.
Originator: From the original ffitest.c */
/* { dg-do run } */
#include "ffitest.h"
#include "float.h"
#include <math.h>
static long double ldblit(float f)
{
return (long double) (((long double) f)/ (long double) 3.0);
}
int main (void)
{
ffi_cif cif;
ffi_type *args[MAX_ARGS];
void *values[MAX_ARGS];
float f;
long double ld;
long double original;
args[0] = &ffi_type_float;
values[0] = &f;
/* Initialize the cif */
CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
&ffi_type_longdouble, args) == FFI_OK);
f = 3.14159;
#if 1
/* This is ifdef'd out for now. long double support under SunOS/gcc
is pretty much non-existent. You'll get the odd bus error in library
routines like printf(). */
printf ("%Lf\n", ldblit(f));
#endif
ld = 666;
ffi_call(&cif, FFI_FN(ldblit), &ld, values);
#if 1
/* This is ifdef'd out for now. long double support under SunOS/gcc
is pretty much non-existent. You'll get the odd bus error in library
routines like printf(). */
printf ("%Lf, %Lf, %Lf, %Lf\n", ld, ldblit(f), ld - ldblit(f), LDBL_EPSILON);
#endif
/* These are not always the same!! Check for a reasonable delta */
original = ldblit(f);
if (((ld > original) ? (ld - original) : (original - ld)) < LDBL_EPSILON)
puts("long double return value tests ok!");
else
CHECK(0);
exit(0);
}
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