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