github.com/core-coin/go-core/v2@v2.1.9/crypto/blake2b/blake2bAVX2_amd64.go (about)

     1  // Copyright 2019 by the Authors
     2  // This file is part of the go-core library.
     3  //
     4  // The go-core library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-core library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-core library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  //go:build go1.7 && amd64 && !gccgo && !appengine
    18  // +build go1.7,amd64,!gccgo,!appengine
    19  
    20  package blake2b
    21  
    22  import "golang.org/x/sys/cpu"
    23  
    24  func init() {
    25  	useAVX2 = cpu.X86.HasAVX2
    26  	useAVX = cpu.X86.HasAVX
    27  	useSSE4 = cpu.X86.HasSSE41
    28  }
    29  
    30  //go:noescape
    31  func fAVX2(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64)
    32  
    33  //go:noescape
    34  func fAVX(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64)
    35  
    36  //go:noescape
    37  func fSSE4(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64)
    38  
    39  func f(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64) {
    40  	switch {
    41  	case useAVX2:
    42  		fAVX2(h, m, c0, c1, flag, rounds)
    43  	case useAVX:
    44  		fAVX(h, m, c0, c1, flag, rounds)
    45  	case useSSE4:
    46  		fSSE4(h, m, c0, c1, flag, rounds)
    47  	default:
    48  		fGeneric(h, m, c0, c1, flag, rounds)
    49  	}
    50  }