Backport subject : 使用ZBB特性优化字节交换功能 #191
Description
Implement endianness swap macros for RISC-V.
Use the rev8 instruction when Zbb is available. Otherwise, rely on the
default mask-and-shift implementation.
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Implement endianness swap macros for RISC-V.
Use the rev8 instruction when Zbb is available. Otherwise, rely on the
default mask-and-shift implementation.