diff options
Diffstat (limited to 'src/common/bit_util.h')
| -rw-r--r-- | src/common/bit_util.h | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/src/common/bit_util.h b/src/common/bit_util.h index 29f59a9a3..685e7fc9b 100644 --- a/src/common/bit_util.h +++ b/src/common/bit_util.h | |||
| @@ -22,82 +22,6 @@ template <typename T> | |||
| 22 | } | 22 | } |
| 23 | 23 | ||
| 24 | #ifdef _MSC_VER | 24 | #ifdef _MSC_VER |
| 25 | [[nodiscard]] inline u32 CountLeadingZeroes32(u32 value) { | ||
| 26 | unsigned long leading_zero = 0; | ||
| 27 | |||
| 28 | if (_BitScanReverse(&leading_zero, value) != 0) { | ||
| 29 | return 31 - leading_zero; | ||
| 30 | } | ||
| 31 | |||
| 32 | return 32; | ||
| 33 | } | ||
| 34 | |||
| 35 | [[nodiscard]] inline u32 CountLeadingZeroes64(u64 value) { | ||
| 36 | unsigned long leading_zero = 0; | ||
| 37 | |||
| 38 | if (_BitScanReverse64(&leading_zero, value) != 0) { | ||
| 39 | return 63 - leading_zero; | ||
| 40 | } | ||
| 41 | |||
| 42 | return 64; | ||
| 43 | } | ||
| 44 | #else | ||
| 45 | [[nodiscard]] inline u32 CountLeadingZeroes32(u32 value) { | ||
| 46 | if (value == 0) { | ||
| 47 | return 32; | ||
| 48 | } | ||
| 49 | |||
| 50 | return static_cast<u32>(__builtin_clz(value)); | ||
| 51 | } | ||
| 52 | |||
| 53 | [[nodiscard]] inline u32 CountLeadingZeroes64(u64 value) { | ||
| 54 | if (value == 0) { | ||
| 55 | return 64; | ||
| 56 | } | ||
| 57 | |||
| 58 | return static_cast<u32>(__builtin_clzll(value)); | ||
| 59 | } | ||
| 60 | #endif | ||
| 61 | |||
| 62 | #ifdef _MSC_VER | ||
| 63 | [[nodiscard]] inline u32 CountTrailingZeroes32(u32 value) { | ||
| 64 | unsigned long trailing_zero = 0; | ||
| 65 | |||
| 66 | if (_BitScanForward(&trailing_zero, value) != 0) { | ||
| 67 | return trailing_zero; | ||
| 68 | } | ||
| 69 | |||
| 70 | return 32; | ||
| 71 | } | ||
| 72 | |||
| 73 | [[nodiscard]] inline u32 CountTrailingZeroes64(u64 value) { | ||
| 74 | unsigned long trailing_zero = 0; | ||
| 75 | |||
| 76 | if (_BitScanForward64(&trailing_zero, value) != 0) { | ||
| 77 | return trailing_zero; | ||
| 78 | } | ||
| 79 | |||
| 80 | return 64; | ||
| 81 | } | ||
| 82 | #else | ||
| 83 | [[nodiscard]] inline u32 CountTrailingZeroes32(u32 value) { | ||
| 84 | if (value == 0) { | ||
| 85 | return 32; | ||
| 86 | } | ||
| 87 | |||
| 88 | return static_cast<u32>(__builtin_ctz(value)); | ||
| 89 | } | ||
| 90 | |||
| 91 | [[nodiscard]] inline u32 CountTrailingZeroes64(u64 value) { | ||
| 92 | if (value == 0) { | ||
| 93 | return 64; | ||
| 94 | } | ||
| 95 | |||
| 96 | return static_cast<u32>(__builtin_ctzll(value)); | ||
| 97 | } | ||
| 98 | #endif | ||
| 99 | |||
| 100 | #ifdef _MSC_VER | ||
| 101 | 25 | ||
| 102 | [[nodiscard]] inline u32 MostSignificantBit32(const u32 value) { | 26 | [[nodiscard]] inline u32 MostSignificantBit32(const u32 value) { |
| 103 | unsigned long result; | 27 | unsigned long result; |