gcc/testsuite/gcc.target/bfin/builtins/negate_fr1x16-2.c

extern void abort (void);

typedef short fract16;

int main ()
{
  fract16 t1;

  t1 = __builtin_bfin_negate_fr1x16 (0x8000);
  if (t1 != 0x7fff)
    abort ();

  return 0;
}