1 /* { dg-do run { target { bmi2 && { ! ia32 } } } } */
2 /* { dg-options "-mbmi2 -O2" } */
3 
4 #include "bmi2-check.h"
5 
6 __attribute__((noinline))
7 unsigned __int128
calc_mul_u64(unsigned long long volatile a,unsigned long long b)8 calc_mul_u64 (unsigned long long volatile a, unsigned long long b)
9 {
10   unsigned __int128 res = 0;
11   int i;
12   for (i = 0; i < b; ++i)
13     res += (unsigned __int128) a;
14 
15   return res;
16 }
17 
18 static void
bmi2_test()19 bmi2_test ()
20 {
21   unsigned i;
22   unsigned long long a = 0xce7ace0ce7ace0;
23   unsigned long long b = 0xface;
24   unsigned __int128 res, res_ref;
25 
26   for (i=0; i<5; ++i) {
27     a = a * (i + 1);
28     b = b / (i + 1);
29 
30     res_ref = calc_mul_u64 (a, b);
31     res = (unsigned __int128) a * b;
32 
33     if (res != res_ref)
34       abort();
35   }
36 }
37