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121 lines
2.2 KiB
121 lines
2.2 KiB
package xor
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import "github.com/templexxx/cpufeat"
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func init() {
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getEXT()
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}
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func getEXT() {
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if cpufeat.X86.HasAVX2 {
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extension = avx2
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} else {
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extension = sse2
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}
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return
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}
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func xorBytes(dst, src0, src1 []byte, size int) {
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switch extension {
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case avx2:
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bytesAVX2(dst, src0, src1, size)
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default:
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bytesSSE2(dst, src0, src1, size)
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}
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}
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// non-temporal hint store
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const nontmp = 8 * 1024
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const avx2loopsize = 128
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func bytesAVX2(dst, src0, src1 []byte, size int) {
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if size < avx2loopsize {
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bytesAVX2mini(dst, src0, src1, size)
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} else if size >= avx2loopsize && size <= nontmp {
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bytesAVX2small(dst, src0, src1, size)
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} else {
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bytesAVX2big(dst, src0, src1, size)
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}
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}
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const sse2loopsize = 64
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func bytesSSE2(dst, src0, src1 []byte, size int) {
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if size < sse2loopsize {
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bytesSSE2mini(dst, src0, src1, size)
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} else if size >= sse2loopsize && size <= nontmp {
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bytesSSE2small(dst, src0, src1, size)
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} else {
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bytesSSE2big(dst, src0, src1, size)
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}
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}
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func xorMatrix(dst []byte, src [][]byte) {
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switch extension {
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case avx2:
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matrixAVX2(dst, src)
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default:
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matrixSSE2(dst, src)
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}
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}
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func matrixAVX2(dst []byte, src [][]byte) {
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size := len(dst)
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if size > nontmp {
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matrixAVX2big(dst, src)
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} else {
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matrixAVX2small(dst, src)
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}
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}
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func matrixSSE2(dst []byte, src [][]byte) {
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size := len(dst)
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if size > nontmp {
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matrixSSE2big(dst, src)
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} else {
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matrixSSE2small(dst, src)
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}
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}
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//go:noescape
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func xorSrc0(dst, src0, src1 []byte)
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//go:noescape
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func xorSrc1(dst, src0, src1 []byte)
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//go:noescape
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func bytesAVX2mini(dst, src0, src1 []byte, size int)
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//go:noescape
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func bytesAVX2big(dst, src0, src1 []byte, size int)
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//go:noescape
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func bytesAVX2small(dst, src0, src1 []byte, size int)
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//go:noescape
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func bytesSSE2mini(dst, src0, src1 []byte, size int)
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//go:noescape
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func bytesSSE2small(dst, src0, src1 []byte, size int)
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//go:noescape
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func bytesSSE2big(dst, src0, src1 []byte, size int)
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//go:noescape
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func matrixAVX2small(dst []byte, src [][]byte)
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//go:noescape
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func matrixAVX2big(dst []byte, src [][]byte)
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//go:noescape
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func matrixSSE2small(dst []byte, src [][]byte)
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//go:noescape
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func matrixSSE2big(dst []byte, src [][]byte)
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//go:noescape
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func hasAVX2() bool
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//go:noescape
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func hasSSE2() bool
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