gcc/testsuite/gcc.target/powerpc/cmpb-2.c

/* { dg-do compile { target { powerpc*-*-* } } } */
/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power5" } } */
/* { dg-require-effective-target lp64 } */
/* { dg-require-effective-target powerpc_popcntb_ok } */
/* { dg-options "-mcpu=power5" } */

void abort ();

unsigned long long int
do_compare (unsigned long long int a, unsigned long long int b)
{
  return __builtin_cmpb (a, b);	/* { dg-warning "implicit declaration of function '__builtin_cmpb'" } */
}

void
expect (unsigned long long int pattern, unsigned long long int value)
{
  if (pattern != value)
    abort ();
}

int
main (int argc, char *argv[])
{
  expect (0xff00000000000000LL,
	  do_compare (0x0123456789abcdefLL, 0x0100000000000000LL));
  expect (0x00ffffffffffffff,
	  do_compare (0x0123456789abcdefLL, 0x0023456789abcdefLL));
  expect (0x00000000000000ff,
	  do_compare (0x00000000000000efLL, 0x0123456789abcdefLL));
}