| 1 | #include "popcount.h" |
| 2 | |
| 3 | static const uint8_t PopCountLUT8Impl[1 << 8] = { |
| 4 | #define B2(n) n, n + 1, n + 1, n + 2 |
| 5 | #define B4(n) B2(n), B2(n + 1), B2(n + 1), B2(n + 2) |
| 6 | #define B6(n) B4(n), B4(n + 1), B4(n + 1), B4(n + 2) |
| 7 | B6(0), B6(1), B6(1), B6(2)}; |
| 8 | |
| 9 | uint8_t const* PopCountLUT8 = PopCountLUT8Impl; |
| 10 | |
| 11 | #if !defined(_MSC_VER) |
| 12 | //ICE here for msvc |
| 13 | |
| 14 | static const uint8_t PopCountLUT16Impl[1 << 16] = { |
| 15 | #define B2(n) n, n + 1, n + 1, n + 2 |
| 16 | #define B4(n) B2(n), B2(n + 1), B2(n + 1), B2(n + 2) |
| 17 | #define B6(n) B4(n), B4(n + 1), B4(n + 1), B4(n + 2) |
| 18 | #define B8(n) B6(n), B6(n + 1), B6(n + 1), B6(n + 2) |
| 19 | #define B10(n) B8(n), B8(n + 1), B8(n + 1), B8(n + 2) |
| 20 | #define B12(n) B10(n), B10(n + 1), B10(n + 1), B10(n + 2) |
| 21 | #define B14(n) B12(n), B12(n + 1), B12(n + 1), B12(n + 2) |
| 22 | B14(0), B14(1), B14(1), B14(2)}; |
| 23 | |
| 24 | uint8_t const* PopCountLUT16 = PopCountLUT16Impl; |
| 25 | #endif |
| 26 | |