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…ck on ppc64le
This updates sha256.block and sha512.block to use vector instructions. While
each round must still be performed independently, this allows for the use of
the vshasigma{w,d} crypto acceleration instructions.
For crypto/sha256:
benchmark old ns/op new ns/op delta
BenchmarkHash8Bytes 570 300 -47.37%
BenchmarkHash1K 7529 3018 -59.91%
BenchmarkHash8K 55308 21938 -60.33%
benchmark old MB/s new MB/s speedup
BenchmarkHash8Bytes 14.01 26.58 1.90x
BenchmarkHash1K 136.00 339.23 2.49x
BenchmarkHash8K 148.11 373.40 2.52x
For crypto/sha512:
benchmark old ns/op new ns/op delta
BenchmarkHash8Bytes 725 394 -45.66%
BenchmarkHash1K 5062 2107 -58.38%
BenchmarkHash8K 34711 13918 -59.90%
benchmark old MB/s new MB/s speedup
BenchmarkHash8Bytes 11.03 20.29 1.84x
BenchmarkHash1K 202.28 485.84 2.40x
BenchmarkHash8K 236.00 588.56 2.49x
Fixesgolang#20069
Change-Id: I28bffe6e9eb484a83a004116fce84acb4942abca
Reviewed-on: https://go-review.googlesource.com/41391
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Carlos Eduardo Seo <cseo@linux.vnet.ibm.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Please answer these questions before submitting your issue. Thanks!
What version of Go are you using (
go version
)?go tip
What operating system and processor architecture are you using (
go env
)?Ubuntu 16.04 ppc64le
What did you do?
Leveraged the ppc64le vector instructions to improve the algorithms used in crypto/sha256 and sha512.
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