diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/internal/chacha20/chacha_ppc64le.go')
-rw-r--r-- | vendor/golang.org/x/crypto/internal/chacha20/chacha_ppc64le.go | 52 |
1 files changed, 0 insertions, 52 deletions
diff --git a/vendor/golang.org/x/crypto/internal/chacha20/chacha_ppc64le.go b/vendor/golang.org/x/crypto/internal/chacha20/chacha_ppc64le.go deleted file mode 100644 index 638cb5e5d..000000000 --- a/vendor/golang.org/x/crypto/internal/chacha20/chacha_ppc64le.go +++ /dev/null @@ -1,52 +0,0 @@ -// Copyright 2019 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. - -// +build ppc64le,!gccgo,!appengine - -package chacha20 - -import "encoding/binary" - -const ( - bufSize = 256 - haveAsm = true -) - -//go:noescape -func chaCha20_ctr32_vmx(out, inp *byte, len int, key *[8]uint32, counter *uint32) - -func (c *Cipher) xorKeyStreamAsm(dst, src []byte) { - if len(src) >= bufSize { - chaCha20_ctr32_vmx(&dst[0], &src[0], len(src)-len(src)%bufSize, &c.key, &c.counter) - } - if len(src)%bufSize != 0 { - chaCha20_ctr32_vmx(&c.buf[0], &c.buf[0], bufSize, &c.key, &c.counter) - start := len(src) - len(src)%bufSize - ts, td, tb := src[start:], dst[start:], c.buf[:] - // Unroll loop to XOR 32 bytes per iteration. - for i := 0; i < len(ts)-32; i += 32 { - td, tb = td[:len(ts)], tb[:len(ts)] // bounds check elimination - s0 := binary.LittleEndian.Uint64(ts[0:8]) - s1 := binary.LittleEndian.Uint64(ts[8:16]) - s2 := binary.LittleEndian.Uint64(ts[16:24]) - s3 := binary.LittleEndian.Uint64(ts[24:32]) - b0 := binary.LittleEndian.Uint64(tb[0:8]) - b1 := binary.LittleEndian.Uint64(tb[8:16]) - b2 := binary.LittleEndian.Uint64(tb[16:24]) - b3 := binary.LittleEndian.Uint64(tb[24:32]) - binary.LittleEndian.PutUint64(td[0:8], s0^b0) - binary.LittleEndian.PutUint64(td[8:16], s1^b1) - binary.LittleEndian.PutUint64(td[16:24], s2^b2) - binary.LittleEndian.PutUint64(td[24:32], s3^b3) - ts, td, tb = ts[32:], td[32:], tb[32:] - } - td, tb = td[:len(ts)], tb[:len(ts)] // bounds check elimination - for i, v := range ts { - td[i] = tb[i] ^ v - } - c.len = bufSize - (len(src) % bufSize) - - } - -} |