RFR: 8277358: Accelerate CRC32-C [v3]

[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
> -------------------------------------------------------

Scott Gibbons has updated the pull request incrementally with one additional commit since the last revision:

  Fixing review comments

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6595/files
  - new: https://git.openjdk.java.net/jdk/pull/6595/files/fd87bb92..92b4b9fc

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6595&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6595&range=01-02

  Stats: 32 lines in 2 files changed: 11 ins; 16 del; 5 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