On Sun, Feb 16, 2025 at 02:55:26PM -0800, Eric Biggers wrote: > This patchset is a replacement for > "[PATCH v4] riscv: Optimize crct10dif with Zbc extension" > (https://lore.kernel.org/r/20250211071101.181652-1-zhihang.shao.iscas@xxxxxxxxx/). > It adopts the approach that I'm taking for x86 where code is shared > among CRC variants. It replaces the existing Zbc optimized CRC32 > functions, then adds Zbc optimized CRC-T10DIF and CRC64 functions. > > This new code should be significantly faster than the current Zbc > optimized CRC32 code and the previously proposed CRC-T10DIF code. It > uses "folding" instead of just Barrett reduction, and it also implements > Barrett reduction more efficiently. > > This applies to crc-next at > https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git/log/?h=crc-next. > It depends on other patches that are queued there for 6.15, so I plan to > take it through there if there are no objections. > > Tested with crc_kunit in QEMU (set CONFIG_CRC_KUNIT_TEST=y and > CONFIG_CRC_BENCHMARK=y), both 32-bit and 64-bit. I don't have real Zbc > capable hardware to benchmark this on, but the new code should work very > well; similar optimizations work very well on other architectures. Any feedback on this series from the RISC-V side? - Eric
