github.com/aigarnetwork/aigar@v0.0.0-20191115204914-d59a6eb70f8e/crypto/blake2b/blake2bAVX2_amd64.go (about)

     1  //  Copyright 2018 The go-ethereum Authors
     2  //  Copyright 2019 The go-aigar Authors
     3  //  This file is part of the go-aigar library.
     4  //
     5  //  The go-aigar library is free software: you can redistribute it and/or modify
     6  //  it under the terms of the GNU Lesser General Public License as published by
     7  //  the Free Software Foundation, either version 3 of the License, or
     8  //  (at your option) any later version.
     9  //
    10  //  The go-aigar library is distributed in the hope that it will be useful,
    11  //  but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  //  GNU Lesser General Public License for more details.
    14  //
    15  //  You should have received a copy of the GNU Lesser General Public License
    16  //  along with the go-aigar library. If not, see <http://www.gnu.org/licenses/>.
    17  
    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  }