crypto

Граф коммитов

Автор	SHA1	Сообщение	Дата
Andreas Auernhammer	cd11541cdf	curve25519: improve cswap Simplify the constant swap function. On amd64: Replace the CMOVQEQ scheme with SSE2 code similar to the non-amd64 code. On non-amd64: Avoid unnecessary loop iterations. The result is less and slightly faster code. name old time/op new time/op delta ScalarBaseMult-4 653µs ± 0% 636µs ± 0% ~ (p=0.100 n=3+3) name old time/op new time/op delta ConstantSwap-4 10.4ns ± 1% 6.2ns ± 0% -39.86% (p=0.029 n=4+4) On an i7-65000U Change-Id: Ia5eea92e0b3eabb6c291d25229aa582b51278552 Reviewed-on: https://go-review.googlesource.com/39693 Reviewed-by: Adam Langley <agl@golang.org> Run-TryBot: Adam Langley <agl@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>	2017-04-13 00:59:54 +00:00
Adam Langley	124e52db8d	go.crypto/curve25519: add package. This consists of ~2000 lines of amd64 assembly and a, much slower, generic Go version in curve25519.go. The assembly has been ported from djb's public domain sources and the only semantic alterations are to deal with Go's split stacks. R=rsc CC=golang-dev https://golang.org/cl/5786045	2012-03-12 10:59:04 -04:00

Автор

SHA1

Сообщение

Дата

Andreas Auernhammer

cd11541cdf

curve25519: improve cswap

Simplify the constant swap function.

On amd64: Replace the CMOVQEQ scheme with SSE2 code similar to the non-amd64 code.
On non-amd64: Avoid unnecessary loop iterations.

The result is less and slightly faster code.

name 			old time/op 	new time/op 	delta
ScalarBaseMult-4   	653µs ± 0%   	636µs ± 0%   	~     (p=0.100 n=3+3)

name 			old time/op 	new time/op 	delta
ConstantSwap-4  	10.4ns ± 1%   	6.2ns ± 0%  	-39.86%  (p=0.029 n=4+4)

On an i7-65000U

Change-Id: Ia5eea92e0b3eabb6c291d25229aa582b51278552
Reviewed-on: https://go-review.googlesource.com/39693
Reviewed-by: Adam Langley <agl@golang.org>
Run-TryBot: Adam Langley <agl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

2017-04-13 00:59:54 +00:00

Adam Langley

124e52db8d

go.crypto/curve25519: add package.

This consists of ~2000 lines of amd64 assembly and a, much slower,
generic Go version in curve25519.go. The assembly has been ported from
djb's public domain sources and the only semantic alterations are to
deal with Go's split stacks.

R=rsc
CC=golang-dev
https://golang.org/cl/5786045

2012-03-12 10:59:04 -04:00

2 Коммитов