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author | Fernando Sahmkow <fsahmkow27@gmail.com> | 2019-03-16 03:50:57 +0100 |
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committer | FernandoS27 <fsahmkow27@gmail.com> | 2019-03-27 19:33:44 +0100 |
commit | 522957f9f302b9521507a365da5871849a03594d (patch) | |
tree | 6d5d9626cb3b5e58fe6fc344917df96d16e52dc8 /src/common/bit_util.h | |
parent | Merge pull request #2285 from lioncash/unused-struct (diff) | |
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Diffstat (limited to 'src/common/bit_util.h')
-rw-r--r-- | src/common/bit_util.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/common/bit_util.h b/src/common/bit_util.h index 1eea17ba1..14e53c273 100644 --- a/src/common/bit_util.h +++ b/src/common/bit_util.h @@ -58,4 +58,23 @@ inline u64 CountLeadingZeroes64(u64 value) { return __builtin_clzll(value); } #endif + +inline u32 CountTrailingZeroes32(u32 value) { + u32 count = 0; + while (((value >> count) & 0xf) == 0 && count < 32) + count += 4; + while (((value >> count) & 1) == 0 && count < 32) + count++; + return count; +} + +inline u64 CountTrailingZeroes64(u64 value) { + u64 count = 0; + while (((value >> count) & 0xf) == 0 && count < 64) + count += 4; + while (((value >> count) & 1) == 0 && count < 64) + count++; + return count; +} + } // namespace Common |