Ptroc created HADOOP-19655:
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Summary: Add RISC-V Zbc (CLMUL) hardware-accelerated CRC32/CRC32C
implementation
Key: HADOOP-19655
URL: https://issues.apache.org/jira/browse/HADOOP-19655
Project: Hadoop Common
Issue Type: Improvement
Components: hadoop-common, performance
Affects Versions: 3.5.0
Reporter: Ptroc
Fix For: 3.5.0
This patch introduces hardware-accelerated CRC32 and CRC32C algorithms for
RISC-V platforms supporting the Zbc extension (CLMUL instructions) in
bulk_crc32_riscv.c.
Key changes:
* Implements optimized CRC32 and CRC32C routines using CLMUL instructions for
zlib and Castagnoli polynomials.
* Automatically switches to hardware acceleration when Zbc is available,
otherwise falls back to generic table-based software implementation.
* Maintains compatibility with platforms lacking Zbc support.
This optimization improves CRC performance on RISC-V CPUs with Zbc extension.
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