libffi/testsuite/libffi.call/return_sl.c

   1 /* Area:        ffi_call
   2    Purpose:     Check if long as return type is handled correctly.
   3    Limitations: none.
   4    PR:          none.
   5  */
   6
   7 /* { dg-do run } */
   8 #include "ffitest.h"
   9 static long return_sl(long l1, long l2)
  10 {
  11   return l1 - l2;
  12 }
  13
  14 int main (void)
  15 {
  16   ffi_cif cif;
  17   ffi_type *args[MAX_ARGS];
  18   void *values[MAX_ARGS];
  19   ffi_arg res;
  20   unsigned long l1, l2;
  21
  22   args[0] = &ffi_type_slong;
  23   args[1] = &ffi_type_slong;
  24   values[0] = &l1;
  25   values[1] = &l2;
  26
  27   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2,
  28                      &ffi_type_slong, args) == FFI_OK);
  29
  30   l1 = 1073741823L;
  31   l2 = 1073741824L;
  32
  33   ffi_call(&cif, FFI_FN(return_sl), &res, values);
  34   printf("res: %ld, %ld\n", (long)res, l1 - l2);
  35   /* { dg-output "res: -1, -1" } */
  36
  37   exit(0);
  38 }