//+build !noasm,!appengine,gc // Copyright (c) 2020 MinIO Inc. All rights reserved. // Use of this source code is governed by a license that can be // found in the LICENSE file. package md5simd import ( "fmt" "math" "sync" "unsafe" "github.com/klauspost/cpuid" ) var hasAVX512 bool //go:noescape func block8(state *uint32, base uintptr, bufs *int32, cache *byte, n int) //go:noescape func block16(state *uint32, base uintptr, ptrs *int32, mask uint64, n int) // 8-way 4x uint32 digests in 4 ymm registers // (ymm0, ymm1, ymm2, ymm3) type digest8 struct { v0, v1, v2, v3 [8]uint32 } // Stack cache for 8x64 byte md5.BlockSize bytes. // Must be 32-byte aligned, so allocate 512+32 and // align upwards at runtime. type cache8 [512 + 32]byte // MD5 magic numbers for one lane of hashing; inflated // 8x below at init time. var md5consts = [64]uint32{ 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8, 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a, 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05, 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665, 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1, 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391, } // inflate the consts 8-way for 8x md5 (256 bit ymm registers) var avx256md5consts = func(c []uint32) []uint32 { inf := make([]uint32, 8*len(c)) for i := range c { for j := 0; j < 8; j++ { inf[(i*8)+j] = c[i] } } return inf }(md5consts[:]) // 16-way 4x uint32 digests in 4 zmm registers type digest16 struct { v0, v1, v2, v3 [16]uint32 } // inflate the consts 16-way for 16x md5 (512 bit zmm registers) var avx512md5consts = func(c []uint32) []uint32 { inf := make([]uint32, 16*len(c)) for i := range c { for j := 0; j < 16; j++ { inf[(i*16)+j] = c[i] } } return inf }(md5consts[:]) func init() { hasAVX512 = cpuid.CPU.AVX512F() } // Interface function to assembly code func (s *md5Server) blockMd5_x16(d *digest16, input [16][]byte, half bool) { if hasAVX512 { blockMd5_avx512(d, input, s.allBufs, &s.maskRounds16) } else { d8a, d8b := digest8{}, digest8{} for i := range d8a.v0 { j := i + 8 d8a.v0[i], d8a.v1[i], d8a.v2[i], d8a.v3[i] = d.v0[i], d.v1[i], d.v2[i], d.v3[i] if !half { d8b.v0[i], d8b.v1[i], d8b.v2[i], d8b.v3[i] = d.v0[j], d.v1[j], d.v2[j], d.v3[j] } } i8 := [2][8][]byte{} for i := range i8[0] { i8[0][i], i8[1][i] = input[i], input[8+i] } if half { blockMd5_avx2(&d8a, i8[0], s.allBufs, &s.maskRounds8a) } else { wg := sync.WaitGroup{} wg.Add(2) go func() { blockMd5_avx2(&d8a, i8[0], s.allBufs, &s.maskRounds8a); wg.Done() }() go func() { blockMd5_avx2(&d8b, i8[1], s.allBufs, &s.maskRounds8b); wg.Done() }() wg.Wait() } for i := range d8a.v0 { j := i + 8 d.v0[i], d.v1[i], d.v2[i], d.v3[i] = d8a.v0[i], d8a.v1[i], d8a.v2[i], d8a.v3[i] if !half { d.v0[j], d.v1[j], d.v2[j], d.v3[j] = d8b.v0[i], d8b.v1[i], d8b.v2[i], d8b.v3[i] } } } } // Interface function to AVX512 assembly code func blockMd5_avx512(s *digest16, input [16][]byte, base []byte, maskRounds *[16]maskRounds) { baseMin := uint64(uintptr(unsafe.Pointer(&(base[0])))) ptrs := [16]int32{} for i := range ptrs { if len(input[i]) > 0 { if len(input[i]) > internalBlockSize { panic(fmt.Sprintf("Sanity check fails for lane %d: maximum input length cannot exceed internalBlockSize", i)) } off := uint64(uintptr(unsafe.Pointer(&(input[i][0])))) - baseMin if off > math.MaxUint32 { panic(fmt.Sprintf("invalid buffer sent with offset %x", off)) } ptrs[i] = int32(off) } } sdup := *s // create copy of initial states to receive intermediate updates rounds := generateMaskAndRounds16(input, maskRounds) for r := 0; r < rounds; r++ { m := maskRounds[r] block16(&sdup.v0[0], uintptr(baseMin), &ptrs[0], m.mask, int(64*m.rounds)) for j := 0; j < len(ptrs); j++ { ptrs[j] += int32(64 * m.rounds) // update pointers for next round if m.mask&(1<<j) != 0 { // update digest if still masked as active (*s).v0[j], (*s).v1[j], (*s).v2[j], (*s).v3[j] = sdup.v0[j], sdup.v1[j], sdup.v2[j], sdup.v3[j] } } } } // Interface function to AVX2 assembly code func blockMd5_avx2(s *digest8, input [8][]byte, base []byte, maskRounds *[8]maskRounds) { baseMin := uint64(uintptr(unsafe.Pointer(&(base[0])))) - 4 ptrs := [8]int32{} for i := range ptrs { if len(input[i]) > 0 { if len(input[i]) > internalBlockSize { panic(fmt.Sprintf("Sanity check fails for lane %d: maximum input length cannot exceed internalBlockSize", i)) } off := uint64(uintptr(unsafe.Pointer(&(input[i][0])))) - baseMin if off > math.MaxUint32 { panic(fmt.Sprintf("invalid buffer sent with offset %x", off)) } ptrs[i] = int32(off) } } sdup := *s // create copy of initial states to receive intermediate updates rounds := generateMaskAndRounds8(input, maskRounds) for r := 0; r < rounds; r++ { m := maskRounds[r] var cache cache8 // stack storage for block8 tmp state block8(&sdup.v0[0], uintptr(baseMin), &ptrs[0], &cache[0], int(64*m.rounds)) for j := 0; j < len(ptrs); j++ { ptrs[j] += int32(64 * m.rounds) // update pointers for next round if m.mask&(1<<j) != 0 { // update digest if still masked as active (*s).v0[j], (*s).v1[j], (*s).v2[j], (*s).v3[j] = sdup.v0[j], sdup.v1[j], sdup.v2[j], sdup.v3[j] } } } }