1  /* { dg-do compile { target { powerpc*-*-* } } } */
       2  /* { dg-require-effective-target lp64 } */
       3  /* { dg-options "-O -mno-popcntb" } */
       4  /* { dg-final { scan-assembler-not "stwbrx" } } */
       5  
       6  void
       7  write_reverse (unsigned long *addr, unsigned long val)
       8  {
       9    unsigned long reverse = __builtin_bswap64 (val);
      10    __atomic_store_n (addr, reverse, __ATOMIC_RELAXED);
      11  }