1  /* { dg-do run } */
       2  /* { dg-additional-options "-mcx16" { target { { i?86-*-* x86_64-*-* } && lp64 } } } */
       3  
       4  #ifdef __x86_64__
       5  #include "cpuid.h"
       6  #endif
       7  
       8  double d = 1.5;
       9  long double ld = 3;
      10  extern void abort (void);
      11  
      12  void
      13  test (void)
      14  {
      15  #pragma omp atomic
      16    d *= 1.25;
      17  #pragma omp atomic
      18    ld /= 0.75;
      19    if (d != 1.875 || ld != 4.0L)
      20      abort ();
      21  }
      22  
      23  int
      24  main (void)
      25  {
      26  #ifdef __x86_64__
      27    unsigned int eax, ebx, ecx, edx;
      28  
      29    if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
      30      return 0;
      31  
      32    if (!(ecx & bit_CMPXCHG16B))
      33      return 0;
      34  #endif
      35    test ();
      36    return 0;
      37  }