8317721: RISC-V: Implement CRC32 intrinsic

[ArsenyBochkarev]

Hi all! Please review this port of _updateBytesCRC32 intrinsic from AArch64 (for now, plain version).

Correctness checks

Tests test/hotspot/jtreg/compiler/codegen/CRCTest.java and test/hotspot/jtreg/compiler/intrinsics/zip/TestCRC32.java are passed, in both of the _updateBytesCRC32 was used.

Performance results on T-Head board

Intrinsic disabled

(-XX:-UseCRC32Intrinsics flag)

Benchmark	(count)	Mode	Cnt	Score	Error	Units
CRC32.TestCRC32.testCRC32Update	64	thrpt	15	768.458	± 20.070	ops/ms
CRC32.TestCRC32.testCRC32Update	128	thrpt	15	699.860	± 44.533	ops/ms
CRC32.TestCRC32.testCRC32Update	256	thrpt	15	558.778	± 5.119	ops/ms
CRC32.TestCRC32.testCRC32Update	512	thrpt	15	420.209	± 4.384	ops/ms
CRC32.TestCRC32.testCRC32Update	2048	thrpt	15	166.945	± 0.817	ops/ms
CRC32.TestCRC32.testCRC32Update	16384	thrpt	15	25.212	± 0.036	ops/ms
CRC32.TestCRC32.testCRC32Update	65536	thrpt	15	6.222	± 0.040	ops/ms

Intrinsic enabled

(-XX:+UseCRC32Intrinsics flag)

Benchmark	(count)	Mode	Cnt	Score	Error	Units
CRC32.TestCRC32.testCRC32Update	64	thrpt	15	7164.484	± 17.943	ops/ms
CRC32.TestCRC32.testCRC32Update	128	thrpt	15	7065.546	± 178.694	ops/ms
CRC32.TestCRC32.testCRC32Update	256	thrpt	15	7153.419	± 26.696	ops/ms
CRC32.TestCRC32.testCRC32Update	512	thrpt	15	7008.298	± 235.055	ops/ms
CRC32.TestCRC32.testCRC32Update	2048	thrpt	15	6570.959	± 612.765	ops/ms
CRC32.TestCRC32.testCRC32Update	16384	thrpt	15	7166.674	± 6.639	ops/ms
CRC32.TestCRC32.testCRC32Update	65536	thrpt	15	6918.064	± 200.009	ops/ms

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8317721: RISC-V: Implement CRC32 intrinsic (Enhancement - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/16850/head:pull/16850
$ git checkout pull/16850

Update a local copy of the PR:
$ git checkout pull/16850
$ git pull https://git.openjdk.org/jdk.git pull/16850/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 16850

View PR using the GUI difftool:
$ git pr show -t 16850

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/16850.diff

Webrev

Link to Webrev Comment

[ArsenyBochkarev]

/cc hotspot

[bridgekeeper]

👋 Welcome back ArsenyBochkarev! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@ArsenyBochkarev
The hotspot label was successfully added.

[mlbridge]

Webrevs

• 00: Full (6c702827)

[ArsenyBochkarev]

Whoops, found an error, so closing this one for a while