diff options
Diffstat (limited to 'src/vendor/golang.org/x/crypto/chacha20/chacha_s390x.go')
-rw-r--r-- | src/vendor/golang.org/x/crypto/chacha20/chacha_s390x.go | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/vendor/golang.org/x/crypto/chacha20/chacha_s390x.go b/src/vendor/golang.org/x/crypto/chacha20/chacha_s390x.go new file mode 100644 index 0000000..4652247 --- /dev/null +++ b/src/vendor/golang.org/x/crypto/chacha20/chacha_s390x.go @@ -0,0 +1,28 @@ +// 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 gc && !purego +// +build gc,!purego + +package chacha20 + +import "golang.org/x/sys/cpu" + +var haveAsm = cpu.S390X.HasVX + +const bufSize = 256 + +// xorKeyStreamVX is an assembly implementation of XORKeyStream. It must only +// be called when the vector facility is available. Implementation in asm_s390x.s. +// +//go:noescape +func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32) + +func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) { + if cpu.S390X.HasVX { + xorKeyStreamVX(dst, src, &c.key, &c.nonce, &c.counter) + } else { + c.xorKeyStreamBlocksGeneric(dst, src) + } +} |