| // Copyright 2018 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| //go:build ignore && (ppc64 || ppc64le) |
| |
| package cipher |
| |
| // xorBytes xors the bytes in a and b. The destination should have enough |
| // space, otherwise xorBytes will panic. Returns the number of bytes xor'd. |
| func xorBytes(dst, a, b []byte) int { |
| n := len(a) |
| if len(b) < n { |
| n = len(b) |
| } |
| if n == 0 { |
| return 0 |
| } |
| _ = dst[n-1] |
| xorBytesVSX(&dst[0], &a[0], &b[0], n) |
| return n |
| } |
| |
| func xorWords(dst, a, b []byte) { |
| xorBytes(dst, a, b) |
| } |
| |
| //go:noescape |
| func xorBytesVSX(dst, a, b *byte, n int) |
