xs/vendor/github.com/klauspost/reedsolomon/galois_noasm.go

70 lines
1.5 KiB
Go

//go:build (!amd64 || noasm || appengine || gccgo) && (!arm64 || noasm || appengine || gccgo) && (!ppc64le || noasm || appengine || gccgo)
// +build !amd64 noasm appengine gccgo
// +build !arm64 noasm appengine gccgo
// +build !ppc64le noasm appengine gccgo
// Copyright 2015, Klaus Post, see LICENSE for details.
package reedsolomon
func galMulSlice(c byte, in, out []byte, o *options) {
out = out[:len(in)]
if c == 1 {
copy(out, in)
return
}
mt := mulTable[c][:256]
for n, input := range in {
out[n] = mt[input]
}
}
func galMulSliceXor(c byte, in, out []byte, o *options) {
out = out[:len(in)]
if c == 1 {
sliceXor(in, out, o)
return
}
mt := mulTable[c][:256]
for n, input := range in {
out[n] ^= mt[input]
}
}
// simple slice xor
func sliceXor(in, out []byte, o *options) {
sliceXorGo(in, out, o)
}
func init() {
defaultOptions.useAVX512 = false
}
// 4-way butterfly
func ifftDIT4(work [][]byte, dist int, log_m01, log_m23, log_m02 ffe, o *options) {
ifftDIT4Ref(work, dist, log_m01, log_m23, log_m02, o)
}
// 4-way butterfly
func fftDIT4(work [][]byte, dist int, log_m01, log_m23, log_m02 ffe, o *options) {
fftDIT4Ref(work, dist, log_m01, log_m23, log_m02, o)
}
// 2-way butterfly forward
func fftDIT2(x, y []byte, log_m ffe, o *options) {
// Reference version:
refMulAdd(x, y, log_m)
sliceXorGo(x, y, o)
}
// 2-way butterfly inverse
func ifftDIT2(x, y []byte, log_m ffe, o *options) {
// Reference version:
sliceXorGo(x, y, o)
refMulAdd(x, y, log_m)
}
func mulgf16(x, y []byte, log_m ffe, o *options) {
refMul(x, y, log_m)
}