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igzip/riscv64: Optimize adler32_rvv for VLEN=128 #390

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igzip/riscv64: Optimize adler32_rvv for VLEN=128 #390

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@leiwen2025
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@leiwen2025 leiwen2025 commented Feb 3, 2026

This PR optimizes the adler32_rvv implementation for vlen=128.

The optimization has been verified on the SG2044 platform:

SG2044:
        new: adler32_warm: runtime =    3062392 usecs, bandwidth 25988 MB in 3.0624 sec = 8486.24 MB/s
        old: adler32_warm: runtime =    3062471 usecs, bandwidth 23095 MB in 3.0625 sec = 7541.43 MB/s

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pablodelara commented Feb 3, 2026

@leiwen2025 could you update Release notes saying Adler32 has been optimized for RISCV?

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@leiwen2025 @pablodelara