8280845: riscv: Intrinsify BigInteger.montgomerySquare

[yhzhu20]

Intrinsify BigInteger.montgomerySquare on RISCV.
On unmatched borad, performance of SPECjvm2008 crypto with intrinsic has improved 40%.
Hotspot/jdk tier1 passed on the unmatched board. And all jtreg tests have been tested on Qemu without new failures.

The details are as follows：
Tested with option “UseMontgomerySquareIntrinsic”.

TRUE(ops/m)	1	2	3	4	geomean
crypto.aes	6.04	6.07	5.78	5.76	5.91	100.81%
crypto.rsa	171.75	172.01	172.03	172.07	171.96	239.34%
crypto.signverify	63.91	63.77	63.96	63.76	63.85	114.35%
crypto	40.48	40.52	39.92	39.84	40.19	140.25%
FALSE(ops/m)
crypto.aes	5.75	5.75	6.26	5.71	5.86
crypto.rsa	72.86	73.22	68.87	72.53	71.85
crypto.signverify	55.75	55.55	55.76	56.29	55.84
crypto	28.58	28.6	28.87	28.57	28.65

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JDK-8280845: riscv: Intrinsify BigInteger.montgomerySquare

Reviewers

• Fei Yang (@RealFYang - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/riscv-port pull/56/head:pull/56
$ git checkout pull/56

Update a local copy of the PR:
$ git checkout pull/56
$ git pull https://git.openjdk.java.net/riscv-port pull/56/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 56

View PR using the GUI difftool:
$ git pr show -t 56

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/riscv-port/pull/56.diff

[bridgekeeper]

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

[mlbridge]

Webrevs

• 00: Full (cea7009c)

[RealFYang]

Great numbers. Looks good.

[openjdk]

@yhzhu20 This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8280845: riscv: Intrinsify BigInteger.montgomerySquare

Reviewed-by: fyang

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 20 new commits pushed to the riscv-port branch:

• 9e37d5c: Merge branch 'master' into riscv-port
• ed826f2: 8280397: Factor out task queue statistics printing
• 8a3cca0: 8280784: VM_Cleanup unnecessarily processes all thread oops
• 973dda5: 8280804: Parallel: Remove unused variables in PSPromotionManager::drain_stacks_depth
• 55f180f: 8280004: DCmdArgument::parse_value() should handle NULL input
• 178ac74: 8251466: test/java/io/File/GetXSpace.java fails on Windows with mapped network drives.
• a1d1e47: 8280823: Remove NULL check in DumpTimeClassInfo::is_excluded
• 094db1a: 8277948: AArch64: Print the correct native stack if -XX:+PreserveFramePointer when crash
• 7857405: 8280744: Allow SuppressWarnings to be used in all declaration contexts
• 40a2ce2: 8270476: Make floating-point test infrastructure more lambda and method reference friendly
• ... and 10 more: https://git.openjdk.java.net/riscv-port/compare/7bb9b27071ee0821d5449d554c89aefd4b445b0d...riscv-port

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the riscv-port branch, type /integrate in a new comment.

[yhzhu20]

/integrate

[openjdk]

Going to push as commit bbc2132.
Since your change was applied there have been 20 commits pushed to the riscv-port branch:

• 9e37d5c: Merge branch 'master' into riscv-port
• ed826f2: 8280397: Factor out task queue statistics printing
• 8a3cca0: 8280784: VM_Cleanup unnecessarily processes all thread oops
• 973dda5: 8280804: Parallel: Remove unused variables in PSPromotionManager::drain_stacks_depth
• 55f180f: 8280004: DCmdArgument::parse_value() should handle NULL input
• 178ac74: 8251466: test/java/io/File/GetXSpace.java fails on Windows with mapped network drives.
• a1d1e47: 8280823: Remove NULL check in DumpTimeClassInfo::is_excluded
• 094db1a: 8277948: AArch64: Print the correct native stack if -XX:+PreserveFramePointer when crash
• 7857405: 8280744: Allow SuppressWarnings to be used in all declaration contexts
• 40a2ce2: 8270476: Make floating-point test infrastructure more lambda and method reference friendly
• ... and 10 more: https://git.openjdk.java.net/riscv-port/compare/7bb9b27071ee0821d5449d554c89aefd4b445b0d...riscv-port

Your commit was automatically rebased without conflicts.

[openjdk]

@yhzhu20 Pushed as commit bbc2132.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.