Michael Munday
8dd112bcdc
Use the recently added CPU feature detection API rather than custom assembly. This will need to be updated to use 'internal/cpu' when the package is revendored into std. Change-Id: Icf0f28236ca0c351c88035f36e5b9c29d4bc2ba7 Reviewed-on: https://go-review.googlesource.com/c/164383 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
30 lines
789 B
Go
30 lines
789 B
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build s390x,!gccgo,!appengine
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package chacha20
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import (
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"golang.org/x/sys/cpu"
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)
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var haveAsm = cpu.S390X.HasVX
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const bufSize = 256
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// xorKeyStreamVX is an assembly implementation of XORKeyStream. It must only
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// be called when the vector facility is available.
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// Implementation in asm_s390x.s.
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//go:noescape
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func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32, buf *[256]byte, len *int)
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func (c *Cipher) xorKeyStreamAsm(dst, src []byte) {
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xorKeyStreamVX(dst, src, &c.key, &c.nonce, &c.counter, &c.buf, &c.len)
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}
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// EXRL targets, DO NOT CALL!
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func mvcSrcToBuf()
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func mvcBufToDst()
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