diff options
Diffstat (limited to 'vendor/github.com/zeebo/xxh3/hash64_seed.go')
| -rw-r--r-- | vendor/github.com/zeebo/xxh3/hash64_seed.go | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/vendor/github.com/zeebo/xxh3/hash64_seed.go b/vendor/github.com/zeebo/xxh3/hash64_seed.go deleted file mode 100644 index 429994c36..000000000 --- a/vendor/github.com/zeebo/xxh3/hash64_seed.go +++ /dev/null @@ -1,134 +0,0 @@ -package xxh3 - -import "math/bits" - -// HashSeed returns the hash of the byte slice with given seed. -func HashSeed(b []byte, seed uint64) uint64 { - return hashAnySeed(*(*str)(ptr(&b)), seed) - -} - -// HashStringSeed returns the hash of the string slice with given seed. -func HashStringSeed(s string, seed uint64) uint64 { - return hashAnySeed(*(*str)(ptr(&s)), seed) -} - -func hashAnySeed(s str, seed uint64) (acc u64) { - p, l := s.p, s.l - - switch { - case l <= 16: - switch { - case l > 8: - inputlo := readU64(p, 0) ^ (key64_024 ^ key64_032 + seed) - inputhi := readU64(p, ui(l)-8) ^ (key64_040 ^ key64_048 - seed) - folded := mulFold64(inputlo, inputhi) - return xxh3Avalanche(u64(l) + bits.ReverseBytes64(inputlo) + inputhi + folded) - - case l > 3: - seed ^= u64(bits.ReverseBytes32(u32(seed))) << 32 - input1 := readU32(p, 0) - input2 := readU32(p, ui(l)-4) - input64 := u64(input2) + u64(input1)<<32 - keyed := input64 ^ (key64_008 ^ key64_016 - seed) - return rrmxmx(keyed, u64(l)) - - case l == 3: // 3 - c12 := u64(readU16(p, 0)) - c3 := u64(readU8(p, 2)) - acc = c12<<16 + c3 + 3<<8 - - case l > 1: // 2 - c12 := u64(readU16(p, 0)) - acc = c12*(1<<24+1)>>8 + 2<<8 - - case l == 1: // 1 - c1 := u64(readU8(p, 0)) - acc = c1*(1<<24+1<<16+1) + 1<<8 - - default: - return xxhAvalancheSmall(seed ^ key64_056 ^ key64_064) - } - - acc ^= u64(key32_000^key32_004) + seed - return xxhAvalancheSmall(acc) - - case l <= 128: - acc = u64(l) * prime64_1 - - if l > 32 { - if l > 64 { - if l > 96 { - acc += mulFold64(readU64(p, 6*8)^(key64_096+seed), readU64(p, 7*8)^(key64_104-seed)) - acc += mulFold64(readU64(p, ui(l)-8*8)^(key64_112+seed), readU64(p, ui(l)-7*8)^(key64_120-seed)) - } // 96 - acc += mulFold64(readU64(p, 4*8)^(key64_064+seed), readU64(p, 5*8)^(key64_072-seed)) - acc += mulFold64(readU64(p, ui(l)-6*8)^(key64_080+seed), readU64(p, ui(l)-5*8)^(key64_088-seed)) - } // 64 - acc += mulFold64(readU64(p, 2*8)^(key64_032+seed), readU64(p, 3*8)^(key64_040-seed)) - acc += mulFold64(readU64(p, ui(l)-4*8)^(key64_048+seed), readU64(p, ui(l)-3*8)^(key64_056-seed)) - } // 32 - acc += mulFold64(readU64(p, 0*8)^(key64_000+seed), readU64(p, 1*8)^(key64_008-seed)) - acc += mulFold64(readU64(p, ui(l)-2*8)^(key64_016+seed), readU64(p, ui(l)-1*8)^(key64_024-seed)) - - return xxh3Avalanche(acc) - - case l <= 240: - acc = u64(l) * prime64_1 - - acc += mulFold64(readU64(p, 0*16+0)^(key64_000+seed), readU64(p, 0*16+8)^(key64_008-seed)) - acc += mulFold64(readU64(p, 1*16+0)^(key64_016+seed), readU64(p, 1*16+8)^(key64_024-seed)) - acc += mulFold64(readU64(p, 2*16+0)^(key64_032+seed), readU64(p, 2*16+8)^(key64_040-seed)) - acc += mulFold64(readU64(p, 3*16+0)^(key64_048+seed), readU64(p, 3*16+8)^(key64_056-seed)) - acc += mulFold64(readU64(p, 4*16+0)^(key64_064+seed), readU64(p, 4*16+8)^(key64_072-seed)) - acc += mulFold64(readU64(p, 5*16+0)^(key64_080+seed), readU64(p, 5*16+8)^(key64_088-seed)) - acc += mulFold64(readU64(p, 6*16+0)^(key64_096+seed), readU64(p, 6*16+8)^(key64_104-seed)) - acc += mulFold64(readU64(p, 7*16+0)^(key64_112+seed), readU64(p, 7*16+8)^(key64_120-seed)) - - // avalanche - acc = xxh3Avalanche(acc) - - // trailing groups after 128 - top := ui(l) &^ 15 - for i := ui(8 * 16); i < top; i += 16 { - acc += mulFold64(readU64(p, i+0)^(readU64(key, i-125)+seed), readU64(p, i+8)^(readU64(key, i-117)-seed)) - } - - // last 16 bytes - acc += mulFold64(readU64(p, ui(l)-16)^(key64_119+seed), readU64(p, ui(l)-8)^(key64_127-seed)) - - return xxh3Avalanche(acc) - - default: - acc = u64(l) * prime64_1 - - secret := key - if seed != 0 { - secret = ptr(&[secretSize]byte{}) - initSecret(secret, seed) - } - - accs := [8]u64{ - prime32_3, prime64_1, prime64_2, prime64_3, - prime64_4, prime32_2, prime64_5, prime32_1, - } - - if hasAVX512 && l >= avx512Switch { - accumAVX512(&accs, p, secret, u64(l)) - } else if hasAVX2 { - accumAVX2(&accs, p, secret, u64(l)) - } else if hasSSE2 { - accumSSE(&accs, p, secret, u64(l)) - } else { - accumScalarSeed(&accs, p, secret, u64(l)) - } - - // merge accs - acc += mulFold64(accs[0]^readU64(secret, 11), accs[1]^readU64(secret, 19)) - acc += mulFold64(accs[2]^readU64(secret, 27), accs[3]^readU64(secret, 35)) - acc += mulFold64(accs[4]^readU64(secret, 43), accs[5]^readU64(secret, 51)) - acc += mulFold64(accs[6]^readU64(secret, 59), accs[7]^readU64(secret, 67)) - - return xxh3Avalanche(acc) - } -} |