3659b8756a
When rva22u64 is available, we can now use the native rotation instructions
from the Zbb extension. Use these instead of synthesising rotation
instructions.
This provides a significant performance gain for SHA-512, the following
benchmarked on a StarFive VisionFive 2:
│ sha512.rva20u64 │ sha512.rva22u64 │
│ B/s │ B/s vs base │
Hash8Bytes/New-4 859.4Ki ± 0% 1337.9Ki ± 0% +55.68% (p=0.000 n=10)
Hash8Bytes/Sum384-4 888.7Ki ± 1% 1308.6Ki ± 1% +47.25% (p=0.000 n=10)
Hash8Bytes/Sum512-4 869.1Ki ± 0% 1269.5Ki ± 1% +46.07% (p=0.000 n=10)
Hash1K/New-4 19.83Mi ± 0% 29.03Mi ± 0% +46.38% (p=0.000 n=10)
Hash1K/Sum384-4 20.00Mi ± 0% 28.86Mi ± 0% +44.30% (p=0.000 n=10)
Hash1K/Sum512-4 19.93Mi ± 0% 28.72Mi ± 0% +44.11% (p=0.000 n=10)
Hash8K/New-4 23.85Mi ± 0% 34.12Mi ± 0% +43.09% (p=0.000 n=10)
Hash8K/Sum384-4 23.88Mi ± 0% 34.09Mi ± 0% +42.77% (p=0.000 n=10)
Hash8K/Sum512-4 23.87Mi ± 0% 34.07Mi ± 0% +42.71% (p=0.000 n=10)
geomean 7.399Mi 10.78Mi +45.77%
Change-Id: I9dca8e3f311eea101684c806cb998872dc697288
Reviewed-on: https://go-review.googlesource.com/c/go/+/572716
Run-TryBot: Joel Sing <joel@sing.id.au>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: M Zhuo <mengzhuo1203@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
Auto-Submit: Emmanuel Odeke <emmanuel@orijtech.com>
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| SECURITY.md | ||
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