1 /* { dg-do run { target { bmi2 && ia32 } } } */
2 /* { dg-options "-mbmi2 -O2" } */
3 
4 #include "bmi2-check.h"
5 
6 __attribute__((noinline))
7 unsigned long long
calc_mul_u32(unsigned volatile a,unsigned b)8 calc_mul_u32 (unsigned volatile a, unsigned b)
9 {
10   unsigned long long res = 0;
11   int i;
12   for (i = 0; i < b; ++i)
13     res += a;
14 
15   return res;
16 }
17 
18 __attribute__((noinline, regparm (2)))
19 unsigned long long
gen_mulx(unsigned a,unsigned b)20 gen_mulx (unsigned a, unsigned b)
21 {
22   unsigned long long res;
23 
24   res = (unsigned long long)a * b;
25 
26   return res;
27 }
28 
29 static void
bmi2_test()30 bmi2_test ()
31 {
32   unsigned i;
33   unsigned a = 0xce7ace0;
34   unsigned b = 0xfacefff;
35   unsigned long long res, res_ref;
36 
37   for (i = 0; i < 5; ++i) {
38     a = a * (i + 1);
39     b = b / (i + 1);
40 
41     res_ref = calc_mul_u32 (a, b);
42     res = gen_mulx (a, b);
43 
44     if (res != res_ref)
45       abort();
46   }
47 }
48