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xxh3_raw.go
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xxh3_raw.go
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// Copyright 2021 ByteDance Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package xxh3_raw
import (
"math/bits"
"unsafe"
"github.com/bytedance/gopkg/internal/runtimex"
)
const (
_stripe = 64
_block = 1024
prime32_1 = 2654435761
prime32_2 = 2246822519
prime32_3 = 3266489917
prime64_1 = 11400714785074694791
prime64_2 = 14029467366897019727
prime64_3 = 1609587929392839161
prime64_4 = 9650029242287828579
prime64_5 = 2870177450012600261
)
var xsecret = unsafe.Pointer(&[192]uint8{
/* 0 */ 0xb8, 0xfe, 0x6c, 0x39, 0x23, 0xa4, 0x4b, 0xbe, 0x7c, 0x01, 0x81, 0x2c, 0xf7, 0x21, 0xad, 0x1c,
/* 16 */ 0xde, 0xd4, 0x6d, 0xe9, 0x83, 0x90, 0x97, 0xdb, 0x72, 0x40, 0xa4, 0xa4, 0xb7, 0xb3, 0x67, 0x1f,
/* 32 */ 0xcb, 0x79, 0xe6, 0x4e, 0xcc, 0xc0, 0xe5, 0x78, 0x82, 0x5a, 0xd0, 0x7d, 0xcc, 0xff, 0x72, 0x21,
/* 48 */ 0xb8, 0x08, 0x46, 0x74, 0xf7, 0x43, 0x24, 0x8e, 0xe0, 0x35, 0x90, 0xe6, 0x81, 0x3a, 0x26, 0x4c,
/* 64 */ 0x3c, 0x28, 0x52, 0xbb, 0x91, 0xc3, 0x00, 0xcb, 0x88, 0xd0, 0x65, 0x8b, 0x1b, 0x53, 0x2e, 0xa3,
/* 80 */ 0x71, 0x64, 0x48, 0x97, 0xa2, 0x0d, 0xf9, 0x4e, 0x38, 0x19, 0xef, 0x46, 0xa9, 0xde, 0xac, 0xd8,
/* 96 */ 0xa8, 0xfa, 0x76, 0x3f, 0xe3, 0x9c, 0x34, 0x3f, 0xf9, 0xdc, 0xbb, 0xc7, 0xc7, 0x0b, 0x4f, 0x1d,
/* 112 */ 0x8a, 0x51, 0xe0, 0x4b, 0xcd, 0xb4, 0x59, 0x31, 0xc8, 0x9f, 0x7e, 0xc9, 0xd9, 0x78, 0x73, 0x64,
/* 128 */ 0xea, 0xc5, 0xac, 0x83, 0x34, 0xd3, 0xeb, 0xc3, 0xc5, 0x81, 0xa0, 0xff, 0xfa, 0x13, 0x63, 0xeb,
/* 144 */ 0x17, 0x0d, 0xdd, 0x51, 0xb7, 0xf0, 0xda, 0x49, 0xd3, 0x16, 0x55, 0x26, 0x29, 0xd4, 0x68, 0x9e,
/* 160 */ 0x2b, 0x16, 0xbe, 0x58, 0x7d, 0x47, 0xa1, 0xfc, 0x8f, 0xf8, 0xb8, 0xd1, 0x7a, 0xd0, 0x31, 0xce,
/* 176 */ 0x45, 0xcb, 0x3a, 0x8f, 0x95, 0x16, 0x04, 0x28, 0xaf, 0xd7, 0xfb, 0xca, 0xbb, 0x4b, 0x40, 0x7e,
})
// Hash returns the hash value of the byte slice in 64bits.
func Hash(data []byte) uint64 {
length := uint64(len(data))
xinput := *(*unsafe.Pointer)(unsafe.Pointer(&data))
if length > 240 {
return hashLarge(xinput, length)
} else if length > 128 {
return xxh3Len129To240_64b(xinput, length)
} else if length > 16 {
return xxh3Len17To128_64b(xinput, length)
} else {
return xxh3Len0To16_64b(xinput, length)
}
}
// HashString returns the hash value of the string in 64bits.
func HashString(s string) uint64 {
return Hash([]byte(s))
}
// Hash128 returns the hash value of the byte slice in 128bits.
func Hash128(data []byte) [2]uint64 {
length := uint64(len(data))
xinput := *(*unsafe.Pointer)(unsafe.Pointer(&data))
if length > 240 {
return hashLarge128(xinput, length)
} else if length > 128 {
return xxh3Len129To240_128b(xinput, length)
} else if length > 16 {
return xxh3Len17To128_128b(xinput, length)
} else {
return xxh3Len0To16_128b(xinput, length)
}
}
// Hash128String returns the hash value of the string in 128bits.
func Hash128String(s string) [2]uint64 {
return Hash128([]byte(s))
}
func xxh3Len0To16_64b(xinput unsafe.Pointer, len uint64) uint64 {
length := uintptr(len)
if length > 8 {
inputlo := runtimex.ReadUnaligned64(xinput) ^ (runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+24)) ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32)))
inputhi := runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-8)) ^ (runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret) + 40))) ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+48))
acc := len + bits.ReverseBytes64(inputlo) + inputhi + mix(inputlo, inputhi)
return xxh3Avalanche(acc)
} else if length >= 4 {
input1 := runtimex.ReadUnaligned32(xinput)
input2 := runtimex.ReadUnaligned32(unsafe.Pointer(uintptr(xinput) + length - 4))
input64 := input2 + input1<<32
keyed := input64 ^ (runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret) + 8))) ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16))
return xxh3RRMXMX(keyed, len)
} else if length > 0 {
q := (*[4]byte)(xinput)
combined := (uint64(q[0]) << 16) | (uint64(q[len>>1]) << 24) | (uint64(q[len-1]) << 0) | len<<8
combined ^= runtimex.ReadUnaligned32(xsecret) ^ runtimex.ReadUnaligned32(unsafe.Pointer(uintptr(xsecret)+4))
return xxh64Avalanche(combined)
} else {
return xxh64Avalanche(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+56)) ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+64)))
}
}
func xxh3Len17To128_64b(xinput unsafe.Pointer, len uint64) uint64 {
length := uintptr(len)
acc := len * prime64_1
if length > 32 {
if length > 64 {
if length > 96 {
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+48))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+96)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+56))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+104)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-64))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+112)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-56))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+120)))
}
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+64)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+40))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+72)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-48))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+80)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-40))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+88)))
}
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+24))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+40)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-32))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+48)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-24))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+56)))
}
acc += mix(runtimex.ReadUnaligned64(xinput)^runtimex.ReadUnaligned64(xsecret), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+8)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-16))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+24)))
return xxh3Avalanche(acc)
}
func xxh3Len129To240_64b(xinput unsafe.Pointer, len uint64) uint64 {
length := uintptr(len)
acc := len * prime64_1
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*0))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*0)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*0+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*0+8)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*1))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*1)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*1+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*1+8)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*2))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*2)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*2+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*2+8)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*3))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*3)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*3+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*3+8)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*4))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*4)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*4+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*4+8)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*5))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*5)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*5+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*5+8)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*6))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*6)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*6+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*6+8)))
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*7))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*7)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*7+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*7+8)))
acc = xxh3Avalanche(acc)
nbRounds := uintptr(length >> 4)
for i := uintptr(8); i < nbRounds; i++ {
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*i))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*i-125)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16*i+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16*i-117)))
}
acc += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-16))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+119)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+127)))
return xxh3Avalanche(acc)
}
func hashLarge(p unsafe.Pointer, length uint64) (acc uint64) {
acc = length * prime64_1
xacc := [8]uint64{
prime32_3, prime64_1, prime64_2, prime64_3,
prime64_4, prime32_2, prime64_5, prime32_1}
accumScalar(&xacc, p, xsecret, length)
//merge xacc
acc += mix(xacc[0]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+11)), xacc[1]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+19)))
acc += mix(xacc[2]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+27)), xacc[3]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+35)))
acc += mix(xacc[4]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+43)), xacc[5]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+51)))
acc += mix(xacc[6]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+59)), xacc[7]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+67)))
return xxh3Avalanche(acc)
}
func xxh3Len0To16_128b(xinput unsafe.Pointer, len uint64) [2]uint64 {
length := uintptr(len)
if length > 8 {
bitflipl := runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32)) ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+40))
bitfliph := runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+48)) ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+56))
inputLow := runtimex.ReadUnaligned64(xinput)
inputHigh := runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput) + length - 8))
m128High64, m128Low64 := bits.Mul64(inputLow^inputHigh^bitflipl, prime64_1)
m128Low64 += uint64(length-1) << 54
inputHigh ^= bitfliph
m128High64 += inputHigh + uint64(uint32(inputHigh))*(prime32_2-1)
m128Low64 ^= bits.ReverseBytes64(m128High64)
h128High64, h128Low64 := bits.Mul64(m128Low64, prime64_2)
h128High64 += m128High64 * prime64_2
h128Low64 = xxh3Avalanche(h128Low64)
h128High64 = xxh3Avalanche(h128High64)
return [2]uint64{h128High64, h128Low64}
} else if length >= 4 {
inputLow := runtimex.ReadUnaligned32(xinput)
inputHigh := runtimex.ReadUnaligned32(unsafe.Pointer(uintptr(xinput) + uintptr(length-4)))
input64 := inputLow + (uint64(inputHigh) << 32)
bitflip := runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16)) ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+24))
keyed := input64 ^ bitflip
m128High64, m128Low64 := bits.Mul64(keyed, prime64_1+(len)<<2)
m128High64 += m128Low64 << 1
m128Low64 ^= m128High64 >> 3
m128Low64 ^= m128Low64 >> 35
m128Low64 *= 0x9fb21c651e98df25
m128Low64 ^= m128Low64 >> 28
m128High64 = xxh3Avalanche(m128High64)
return [2]uint64{m128High64, m128Low64}
} else if length >= 1 {
q := (*[4]byte)(xinput)
combinedl := (uint64(q[0]) << 16) | (uint64(q[len>>1]) << 24) | (uint64(q[len-1]) << 0) | len<<8
combinedh := uint64(bits.RotateLeft32(bits.ReverseBytes32(uint32(combinedl)), 13))
bitflipl := runtimex.ReadUnaligned32(xsecret) ^ runtimex.ReadUnaligned32(unsafe.Pointer(uintptr(xsecret)+4))
bitfliph := runtimex.ReadUnaligned32(unsafe.Pointer(uintptr(xsecret)+8)) ^ runtimex.ReadUnaligned32(unsafe.Pointer(uintptr(xsecret)+12))
keyedLow := combinedl ^ bitflipl
keyedHigh := combinedh ^ bitfliph
keyedLow = combinedl ^ bitflipl
keyedHigh = combinedh ^ bitfliph
h128Low64 := xxh64Avalanche(keyedLow)
h128High64 := xxh64Avalanche(keyedHigh)
return [2]uint64{h128High64, h128Low64}
}
bitflipl := runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+64)) ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+72))
bitfliph := runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+80)) ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+88))
h128High64 := xxh64Avalanche(bitfliph)
h128Low64 := xxh64Avalanche(bitflipl)
return [2]uint64{h128High64, h128Low64}
}
func xxh3Len17To128_128b(xinput unsafe.Pointer, len uint64) [2]uint64 {
length := uintptr(len)
accHigh := uint64(0)
accLow := len * prime64_1
if length > 32 {
if length > 64 {
if length > 96 {
accLow += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+48))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+96)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+56))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+104)))
accLow ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-64)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-56))
accHigh += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-64))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+112)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-56))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+120)))
accHigh ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+48)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+56))
}
accLow += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+64)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+40))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+72)))
accLow ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-48)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-40))
accHigh += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-48))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+80)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-40))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+88)))
accHigh ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+40))
}
accLow += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+3*8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+40)))
accLow ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-32)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-3*8))
accHigh += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-32))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+48)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-3*8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+56)))
accHigh ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+16)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+3*8))
}
accLow += mix(runtimex.ReadUnaligned64(xinput)^runtimex.ReadUnaligned64(xsecret), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+8)))
accLow ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-16)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-8))
accHigh += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-16))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+16)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+24)))
accHigh ^= runtimex.ReadUnaligned64(xinput) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+8))
h128Low := accHigh + accLow
h128High := (accLow * prime64_1) + (accHigh * prime64_4) + (len * prime64_2)
h128Low = xxh3Avalanche(h128Low)
h128High = -xxh3Avalanche(h128High)
return [2]uint64{h128High, h128Low}
}
func xxh3Len129To240_128b(xinput unsafe.Pointer, len uint64) [2]uint64 {
length := uintptr(len)
nbRounds := length &^ 31 / 32
accLow64 := len * prime64_1
accHigh64 := uint64(0)
for i := uintptr(0); i < 4; i++ {
accLow64 += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32*i)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32*i+8)))
accLow64 ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+16)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+24))
accHigh64 += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+16))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32*i+16)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+24))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32*i+24)))
accHigh64 ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+8))
}
accLow64 = xxh3Avalanche(accLow64)
accHigh64 = xxh3Avalanche(accHigh64)
for i := uintptr(4); i < nbRounds; i++ {
accHigh64 += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+16))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32*i-109)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+24))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32*i-101)))
accHigh64 ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+8))
accLow64 += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32*i-125)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+32*i-117)))
accLow64 ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+16)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+32*i+24))
}
// last 32 bytes
accLow64 += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-16))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+103)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-8))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+111)))
accLow64 ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-32)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-24))
accHigh64 += mix(runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-32))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+119)), runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-24))^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+127)))
accHigh64 ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-16)) + runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput)+length-8))
accHigh64, accLow64 = (accLow64*prime64_1)+(accHigh64*prime64_4)+(len*prime64_2), accHigh64+accLow64
accLow64 = xxh3Avalanche(accLow64)
accHigh64 = -xxh3Avalanche(accHigh64)
return [2]uint64{accHigh64, accLow64}
}
func hashLarge128(p unsafe.Pointer, length uint64) (acc [2]uint64) {
acc[1] = length * prime64_1
acc[0] = ^(length * prime64_2)
xacc := [8]uint64{
prime32_3, prime64_1, prime64_2, prime64_3,
prime64_4, prime32_2, prime64_5, prime32_1}
accumScalar(&xacc, p, xsecret, length)
// merge xacc
acc[1] += mix(xacc[0]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+11)), xacc[1]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+19)))
acc[1] += mix(xacc[2]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+27)), xacc[3]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+35)))
acc[1] += mix(xacc[4]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+43)), xacc[5]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+51)))
acc[1] += mix(xacc[6]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+59)), xacc[7]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+67)))
acc[1] = xxh3Avalanche(acc[1])
acc[0] += mix(xacc[0]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+117)), xacc[1]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+125)))
acc[0] += mix(xacc[2]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+133)), xacc[3]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+141)))
acc[0] += mix(xacc[4]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+149)), xacc[5]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+157)))
acc[0] += mix(xacc[6]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+165)), xacc[7]^runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret)+173)))
acc[0] = xxh3Avalanche(acc[0])
return acc
}
func accumScalar(xacc *[8]uint64, xinput, xsecret unsafe.Pointer, l uint64) {
j := uint64(0)
// Loops over block, process 16*8*8=1024 bytes of data each iteration
for ; j < (l-1)/1024; j++ {
k := xsecret
for i := 0; i < 16; i++ {
for j := uintptr(0); j < 8; j++ {
dataVec := runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput) + 8*j))
keyVec := dataVec ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(k)+8*j))
xacc[j^1] += dataVec
xacc[j] += (keyVec & 0xffffffff) * (keyVec >> 32)
}
xinput, k = unsafe.Pointer(uintptr(xinput)+_stripe), unsafe.Pointer(uintptr(k)+8)
}
// scramble xacc
for j := uintptr(0); j < 8; j++ {
xacc[j] ^= xacc[j] >> 47
xacc[j] ^= runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xsecret) + 128 + 8*j))
xacc[j] *= prime32_1
}
}
l -= _block * j
// last partial block (1024 bytes)
if l > 0 {
k := xsecret
i := uint64(0)
for ; i < (l-1)/_stripe; i++ {
for j := uintptr(0); j < 8; j++ {
dataVec := runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput) + 8*j))
keyVec := dataVec ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(k)+8*j))
xacc[j^1] += dataVec
xacc[j] += (keyVec & 0xffffffff) * (keyVec >> 32)
}
xinput, k = unsafe.Pointer(uintptr(xinput)+_stripe), unsafe.Pointer(uintptr(k)+8)
}
l -= _stripe * i
// last stripe (64 bytes)
if l > 0 {
xinput = unsafe.Pointer(uintptr(xinput) - uintptr(_stripe-l))
k = unsafe.Pointer(uintptr(xsecret) + 121)
for j := uintptr(0); j < 8; j++ {
dataVec := runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(xinput) + 8*j))
keyVec := dataVec ^ runtimex.ReadUnaligned64(unsafe.Pointer(uintptr(k)+8*j))
xacc[j^1] += dataVec
xacc[j] += (keyVec & 0xffffffff) * (keyVec >> 32)
}
}
}
}
func mix(a, b uint64) uint64 {
hi, lo := bits.Mul64(a, b)
return hi ^ lo
}
func xxh3RRMXMX(h64 uint64, length uint64) uint64 {
h64 ^= bits.RotateLeft64(h64, 49) ^ bits.RotateLeft64(h64, 24)
h64 *= 0x9fb21c651e98df25
h64 ^= (h64 >> 35) + length
h64 *= 0x9fb21c651e98df25
h64 ^= (h64 >> 28)
return h64
}
func xxh64Avalanche(h64 uint64) uint64 {
h64 ^= h64 >> 33
h64 *= prime64_2
h64 ^= h64 >> 29
h64 *= prime64_3
h64 ^= h64 >> 32
return h64
}
func xxh3Avalanche(x uint64) uint64 {
x ^= x >> 37
x *= 0x165667919e3779f9
x ^= x >> 32
return x
}