| /* { dg-do compile } */ |
| /* { dg-options "-O3 -maltivec -mvsx" } */ |
| /* { dg-require-effective-target lp64 } */ |
| |
| #define NO_WARN_X86_INTRINSICS 1 |
| #include <x86intrin.h> |
| |
| unsigned long long |
| test__bzhi_u64_group (unsigned long long a) |
| { |
| /* bzhi is implemented in source as shift left then shift right |
| to clear the high order bits. |
| For the case where the starting index is const, the compiler |
| should reduces this to a single Rotate Left Doubleword |
| Immediate then Clear Left (rldicl) instruction. */ |
| unsigned long long res; |
| res = _bzhi_u64 (a, 8); |
| res += _bzhi_u64 (a, 16); |
| res += _bzhi_u64 (a, 24); |
| res += _bzhi_u64 (a, 32); |
| res += _bzhi_u64 (a, 40); |
| res += _bzhi_u64 (a, 48); |
| return (res); |
| } |
| /* the resulting assembler should have 6 X rldicl and no sld or |
| srd instructions. */ |
| |
| /* { dg-final { scan-assembler-times "rldicl" 6 } } */ |
| /* { dg-final { scan-assembler-not "sld" } } */ |
| /* { dg-final { scan-assembler-not "srd" } } */ |
