| /* { dg-do run } */ |
| /* { dg-options "-O3" } */ |
| /* { dg-require-effective-target lp64 } */ |
| /* { dg-require-effective-target ppc_cpu_supports_hw } */ |
| |
| #define NO_WARN_X86_INTRINSICS 1 |
| #include "bmi2-check.h" |
| |
| __attribute__((noinline)) |
| unsigned long long |
| calc_mul_u32 (unsigned volatile a, unsigned b) |
| { |
| unsigned long long res = 0; |
| int i; |
| for (i = 0; i < b; ++i) |
| res += a; |
| |
| return res; |
| } |
| |
| __attribute__((noinline)) |
| unsigned long long |
| gen_mulx (unsigned a, unsigned b) |
| { |
| unsigned long long res; |
| |
| res = (unsigned long long)a * b; |
| |
| return res; |
| } |
| |
| static void |
| bmi2_test () |
| { |
| unsigned i; |
| unsigned a = 0xce7ace0; |
| unsigned b = 0xfacefff; |
| unsigned long long res, res_ref; |
| |
| for (i = 0; i < 5; ++i) { |
| a = a * (i + 1); |
| b = b / (i + 1); |
| |
| res_ref = calc_mul_u32 (a, b); |
| res = gen_mulx (a, b); |
| |
| if (res != res_ref) |
| abort(); |
| } |
| } |