1  /* { dg-do run { target { bmi2 && ia32 } } } */
       2  /* { dg-options "-mbmi2 -O2" } */
       3  
       4  #include <x86intrin.h>
       5  
       6  #include "bmi2-check.h"
       7  
       8  __attribute__((noinline))
       9  unsigned long long
      10  calc_mul_u32 (unsigned volatile a, unsigned b)
      11  {
      12    unsigned long long res = 0;
      13    int i;
      14    for (i = 0; i < b; ++i)
      15      res += a;
      16  
      17    return res;
      18  }
      19  
      20  __attribute__((noinline, regparm (2)))
      21  unsigned calc_mulx_u32 (unsigned x, unsigned y, unsigned *res_h)
      22  {
      23    return (unsigned) _mulx_u32 (x, y, res_h);
      24  }
      25  
      26  static void
      27  bmi2_test ()
      28  {
      29    unsigned i;
      30    unsigned a = 0xce7ace0;
      31    unsigned b = 0xfacefff;
      32    unsigned res_l, res_h;
      33    unsigned long long res, res_ref;
      34  
      35    for (i = 0; i < 5; ++i) {
      36      a = a * (i + 1);
      37      b = b / (i + 1);
      38  
      39      res_ref = calc_mul_u32 (a, b);
      40      res_l = calc_mulx_u32 (a, b, &res_h);
      41  
      42      res = ((unsigned long long) res_h << 32) | res_l;
      43  
      44      if (res != res_ref)
      45        abort();
      46    }
      47  }