RFR: 8252204: AArch64: Implement SHA3 accelerator/intrinsic [v8]

[Fei Yang]

> Contributed-by: ard.biesheuvel at linaro.org, dongbo4 at huawei.com
> 
> This added an intrinsic for SHA3 using aarch64 v8.2 SHA3 Crypto Extensions.
> Reference implementation for core SHA-3 transform using ARMv8.2 Crypto Extensions:
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/arch/arm64/crypto/sha3-ce-core.S?h=v5.4.52
> 
> Trivial adaptation in SHA3. implCompress is needed for the purpose of adding the intrinsic.
> For SHA3, we need to pass one extra parameter "digestLength" to the stub for the calculation of block size.
> "digestLength" is also used in for the EOR loop before keccak to differentiate different SHA3 variants.
> 
> We added jtreg tests for SHA3 and used QEMU system emulator which supports SHA3 instructions to test the functionality.
> Patch passed jtreg tier1-3 tests with QEMU system emulator.
> Also verified with jtreg tier1-3 tests without SHA3 instructions on aarch64-linux-gnu and x86_64-linux-gnu, to make
> sure that there's no regression.
> We used one existing JMH test for performance test: test/micro/org/openjdk/bench/java/security/MessageDigests.java
> We measured the performance benefit with an aarch64 cycle-accurate simulator.
> Patch delivers 20% - 40% performance improvement depending on specific SHA3 digest length and size of the message.
> 
> For now, this feature will not be enabled automatically for aarch64. We can auto-enable this when it is fully tested on
> real hardware.  But for the above testing purposes, this is auto-enabled when the corresponding hardware feature is
> detected.

Fei Yang has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains
10 commits:

 - Remove unnecessary code changes in vm_version_aarch64.cpp
 - Merge master
 - Merge master
 - Merge master
 - Merge master
 - Add sha3 instructions to cpu/aarch64/aarch64-asmtest.py and regenerate the test in assembler_aarch64.cpp:asm_check
 - Rebase
 - Merge master
 - Fix trailing whitespace issue
 - 8252204: AArch64: Implement SHA3 accelerator/intrinsic
   Contributed-by: ard.biesheuvel at linaro.org, dongbo4 at huawei.com

-------------

Changes: https://git.openjdk.java.net/jdk/pull/207/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=207&range=07
  Stats: 1498 lines in 35 files changed: 1011 ins; 22 del; 465 mod
  Patch: https://git.openjdk.java.net/jdk/pull/207.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/207/head:pull/207

PR: https://git.openjdk.java.net/jdk/pull/207