58 lines
1.9 KiB
Go
58 lines
1.9 KiB
Go
// The MIT License (MIT)
|
|
//
|
|
// Copyright (C) 2016-2017 Vivint, Inc.
|
|
// Copyright (c) 2015 Klaus Post
|
|
// Copyright (c) 2015 Backblaze
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
// SOFTWARE.
|
|
|
|
package infectious
|
|
|
|
//go:noescape
|
|
func addmulSSSE3(lowhigh *pair, in, out *byte, n int, mul *byte)
|
|
|
|
//go:noescape
|
|
func addmulAVX2(lowhigh *pair, in, out *byte, n int)
|
|
|
|
func addmul(z, x []byte, y byte) {
|
|
if len(z) == 0 {
|
|
return
|
|
}
|
|
|
|
var done int
|
|
if hasAVX2 {
|
|
addmulAVX2(&mul_table_pair[y], &x[0], &z[0], len(z))
|
|
done = (len(x) >> 5) << 5
|
|
} else if hasSSSE3 {
|
|
addmulSSSE3(&mul_table_pair[y], &x[0], &z[0], len(z), &gf_mul_table[y][0])
|
|
//done = (len(x) >> 4) << 4
|
|
return
|
|
}
|
|
|
|
if done < len(z) {
|
|
// hints to the compiler to remove bounds checks
|
|
z = z[done:]
|
|
x = x[done : done+len(z)]
|
|
|
|
gf_mul_y := gf_mul_table[y][:]
|
|
for i := range z {
|
|
z[i] ^= gf_mul_y[x[i]]
|
|
}
|
|
}
|
|
}
|