gitea/vendor/golang.org/x/crypto/chacha20/chacha_s390x.go
6543 8d2059a201
update: macaron cores,gzip,session (#10522)
Co-authored-by: zeripath <art27@cantab.net>
2020-02-28 10:51:18 +01:00

27 lines
740 B
Go
Vendored

// 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.
// +build !gccgo,!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)
}
}