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author | openshift-ci[bot] <75433959+openshift-ci[bot]@users.noreply.github.com> | 2021-08-10 14:51:29 +0000 |
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committer | GitHub <noreply@github.com> | 2021-08-10 14:51:29 +0000 |
commit | 859ffb40ae839007ed7fe673312d39177d12244a (patch) | |
tree | 15de14be5303271867bec3aca8ff440268f53dc5 /vendor/github.com/klauspost/compress/zstd/hash.go | |
parent | 904e0f20e1aa2662138267f16d0730d9ae2c69a3 (diff) | |
parent | f7de8bc8096f3dfdf25a4b08b0b933a43192218c (diff) | |
download | podman-859ffb40ae839007ed7fe673312d39177d12244a.tar.gz podman-859ffb40ae839007ed7fe673312d39177d12244a.tar.bz2 podman-859ffb40ae839007ed7fe673312d39177d12244a.zip |
Merge pull request #11178 from containers/dependabot/go_modules/github.com/containers/storage-1.34.0
Bump github.com/containers/storage from 1.33.1 to 1.34.0
Diffstat (limited to 'vendor/github.com/klauspost/compress/zstd/hash.go')
-rw-r--r-- | vendor/github.com/klauspost/compress/zstd/hash.go | 60 |
1 files changed, 12 insertions, 48 deletions
diff --git a/vendor/github.com/klauspost/compress/zstd/hash.go b/vendor/github.com/klauspost/compress/zstd/hash.go index 4a752067f..cf33f29a1 100644 --- a/vendor/github.com/klauspost/compress/zstd/hash.go +++ b/vendor/github.com/klauspost/compress/zstd/hash.go @@ -13,24 +13,24 @@ const ( prime8bytes = 0xcf1bbcdcb7a56463 ) -// hashLen returns a hash of the lowest l bytes of u for a size size of h bytes. -// l must be >=4 and <=8. Any other value will return hash for 4 bytes. -// h should always be <32. -// Preferably h and l should be a constant. -// FIXME: This does NOT get resolved, if 'mls' is constant, -// so this cannot be used. -func hashLen(u uint64, hashLog, mls uint8) uint32 { +// hashLen returns a hash of the lowest mls bytes of with length output bits. +// mls must be >=3 and <=8. Any other value will return hash for 4 bytes. +// length should always be < 32. +// Preferably length and mls should be a constant for inlining. +func hashLen(u uint64, length, mls uint8) uint32 { switch mls { + case 3: + return (uint32(u<<8) * prime3bytes) >> (32 - length) case 5: - return hash5(u, hashLog) + return uint32(((u << (64 - 40)) * prime5bytes) >> (64 - length)) case 6: - return hash6(u, hashLog) + return uint32(((u << (64 - 48)) * prime6bytes) >> (64 - length)) case 7: - return hash7(u, hashLog) + return uint32(((u << (64 - 56)) * prime7bytes) >> (64 - length)) case 8: - return hash8(u, hashLog) + return uint32((u * prime8bytes) >> (64 - length)) default: - return hash4x64(u, hashLog) + return (uint32(u) * prime4bytes) >> (32 - length) } } @@ -39,39 +39,3 @@ func hashLen(u uint64, hashLog, mls uint8) uint32 { func hash3(u uint32, h uint8) uint32 { return ((u << (32 - 24)) * prime3bytes) >> ((32 - h) & 31) } - -// hash4 returns the hash of u to fit in a hash table with h bits. -// Preferably h should be a constant and should always be <32. -func hash4(u uint32, h uint8) uint32 { - return (u * prime4bytes) >> ((32 - h) & 31) -} - -// hash4x64 returns the hash of the lowest 4 bytes of u to fit in a hash table with h bits. -// Preferably h should be a constant and should always be <32. -func hash4x64(u uint64, h uint8) uint32 { - return (uint32(u) * prime4bytes) >> ((32 - h) & 31) -} - -// hash5 returns the hash of the lowest 5 bytes of u to fit in a hash table with h bits. -// Preferably h should be a constant and should always be <64. -func hash5(u uint64, h uint8) uint32 { - return uint32(((u << (64 - 40)) * prime5bytes) >> ((64 - h) & 63)) -} - -// hash6 returns the hash of the lowest 6 bytes of u to fit in a hash table with h bits. -// Preferably h should be a constant and should always be <64. -func hash6(u uint64, h uint8) uint32 { - return uint32(((u << (64 - 48)) * prime6bytes) >> ((64 - h) & 63)) -} - -// hash7 returns the hash of the lowest 7 bytes of u to fit in a hash table with h bits. -// Preferably h should be a constant and should always be <64. -func hash7(u uint64, h uint8) uint32 { - return uint32(((u << (64 - 56)) * prime7bytes) >> ((64 - h) & 63)) -} - -// hash8 returns the hash of u to fit in a hash table with h bits. -// Preferably h should be a constant and should always be <64. -func hash8(u uint64, h uint8) uint32 { - return uint32((u * prime8bytes) >> ((64 - h) & 63)) -} |