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- // 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 s390x,!gccgo,!appengine
-
- package chacha20
-
- var haveAsm = hasVectorFacility()
-
- const bufSize = 256
-
- // hasVectorFacility reports whether the machine supports the vector
- // facility (vx).
- // Implementation in asm_s390x.s.
- func hasVectorFacility() bool
-
- // 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, buf *[256]byte, len *int)
-
- func (c *Cipher) xorKeyStreamAsm(dst, src []byte) {
- xorKeyStreamVX(dst, src, &c.key, &c.nonce, &c.counter, &c.buf, &c.len)
- }
-
- // EXRL targets, DO NOT CALL!
- func mvcSrcToBuf()
- func mvcBufToDst()
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