RFR: 8277358: Accelerate CRC32-C

[Scott Gibbons]

Accelerates CRC32-C by utilizing vpclmulqdq similarly to CRC32.  This change achieves ~4x throughput improvement.

5986.947899319073 MB/s => 24041.05203089616 MB/s
5840.02689336947 MB/s => 24898.781468710356 MB/s

********** Original ***********


scottgi at 96974-ICX32:~/crc/jdk (asgibbons-crc32c)$ java test/hotspot/jtreg/compiler/intrinsics/zip/TestCRC32C.java 20000000
 offset = 0
msgSize = 512 bytes
  iters = 20000000
-------------------------------------------------------
CRCs: crc = ae10ee5a, crcReference = ae10ee5a
CRC32C.update(byte[]) runtime = 1.710387358 seconds
CRC32C.update(byte[]) throughput = 5986.947899319073 MB/s
CRCs: crc = ae10ee5a, crcReference = ae10ee5a
-------------------------------------------------------
CRCs: crc = ae10ee5a, crcReference = ae10ee5a
CRC32C.update(ByteBuffer) runtime = 1.753416583 seconds
CRC32C.update(ByteBuffer) throughput = 5840.02689336947 MB/s
CRCs: crc = ae10ee5a, crcReference = ae10ee5a
-------------------------------------------------------




*********** With my changes: *************



scottgi at 96974-ICX32:~/crc/jdk (asgibbons-crc32c)$ java test/hotspot/jtreg/compiler/intrinsics/zip/TestCRC32C.java 20000000
 offset = 0
msgSize = 512 bytes
  iters = 20000000
-------------------------------------------------------
CRCs: crc = ae10ee5a, crcReference = ae10ee5a
CRC32C.update(byte[]) runtime = 0.425938099 seconds
CRC32C.update(byte[]) throughput = 24041.05203089616 MB/s
CRCs: crc = ae10ee5a, crcReference = ae10ee5a
-------------------------------------------------------
CRCs: crc = ae10ee5a, crcReference = ae10ee5a
CRC32C.update(ByteBuffer) runtime = 0.411265106 seconds
CRC32C.update(ByteBuffer) throughput = 24898.781468710356 MB/s
CRCs: crc = ae10ee5a, crcReference = ae10ee5a
-------------------------------------------------------

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

Commit messages:
 - Merge branch 'asgibbons-crc32c' of https://github.com/asgibbons/jdk into asgibbons-crc32c
 - Merge branch 'master' into asgibbons-crc32c
 - Asgibbons crc32c (#7)
 - Merge branch 'openjdk:master' into master
 - Revert .gitignore change
 - Move register save to within conditional; add comments
 - Bad merge.
 - Merge branch 'asgibbons-crc32c' of https://github.com/asgibbons/jdk into asgibbons-crc32c
 - ZZMerge branch 'asgibbons-crc32c' of https://github.com/asgibbons/jdk into asgibbons-crc32c
 - Use existing CRC32 code with different table for CRC32-C
 - ... and 203 more: https://git.openjdk.java.net/jdk/compare/e9b36a83...10aeaec6

Changes: https://git.openjdk.java.net/jdk/pull/6595/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6595&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277358
  Stats: 62 lines in 4 files changed: 40 ins; 1 del; 21 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6595.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6595/head:pull/6595

PR: https://git.openjdk.java.net/jdk/pull/6595