mirror of https://github.com/minio/minio.git
68 lines
1.3 KiB
Go
68 lines
1.3 KiB
Go
|
//+build !noasm
|
||
|
|
//+build !appengine
|
||
|
|
//+build !gccgo
|
||
|
|
|
||
|
|
// Copyright 2015, Klaus Post, see LICENSE for details.
|
||
|
|
// Copyright 2018, Minio, Inc.
|
||
|
|
|
||
|
|
package reedsolomon
|
||
|
|
|
||
|
|
//go:noescape
|
||
|
|
func galMulPpc(low, high, in, out []byte)
|
||
|
|
|
||
|
|
//go:noescape
|
||
|
|
func galMulPpcXor(low, high, in, out []byte)
|
||
|
|
|
||
|
|
// This is what the assembler routines do in blocks of 16 bytes:
|
||
|
|
/*
|
||
|
|
func galMulPpc(low, high, in, out []byte) {
|
||
|
|
for n, input := range in {
|
||
|
|
l := input & 0xf
|
||
|
|
h := input >> 4
|
||
|
|
out[n] = low[l] ^ high[h]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
func galMulPpcXor(low, high, in, out []byte) {
|
||
|
|
for n, input := range in {
|
||
|
|
l := input & 0xf
|
||
|
|
h := input >> 4
|
||
|
|
out[n] ^= low[l] ^ high[h]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
|
||
|
|
func galMulSlice(c byte, in, out []byte, ssse3, avx2 bool) {
|
||
|
|
done := (len(in) >> 4) << 4
|
||
|
|
if done > 0 {
|
||
|
|
galMulPpc(mulTableLow[c][:], mulTableHigh[c][:], in[:done], out)
|
||
|
|
}
|
||
|
|
remain := len(in) - done
|
||
|
|
if remain > 0 {
|
||
|
|
mt := mulTable[c]
|
||
|
|
for i := done; i < len(in); i++ {
|
||
|
|
out[i] = mt[in[i]]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func galMulSliceXor(c byte, in, out []byte, ssse3, avx2 bool) {
|
||
|
|
done := (len(in) >> 4) << 4
|
||
|
|
if done > 0 {
|
||
|
|
galMulPpcXor(mulTableLow[c][:], mulTableHigh[c][:], in[:done], out)
|
||
|
|
}
|
||
|
|
remain := len(in) - done
|
||
|
|
if remain > 0 {
|
||
|
|
mt := mulTable[c]
|
||
|
|
for i := done; i < len(in); i++ {
|
||
|
|
out[i] ^= mt[in[i]]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// slice galois add
|
||
|
|
func sliceXor(in, out []byte, sse2 bool) {
|
||
|
|
for n, input := range in {
|
||
|
|
out[n] ^= input
|
||
|
|
}
|
||
|
|
}
|