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81faa2e653
While most ARM64 and LoongArch processors support unaligned access,
the code wouldn't have worked on strict-align processors.
Use byte-by-byte method if the input buffer is at most 7 bytes. This
way the code works on strict-align processors too. It might not be
the very best method for tiny buffers, but it shouldn't matter in
practice (the simple implementation for big buffers isn't amazing
either because it cannot execute more than one CRC32 instruction
at a time on superscalar processors).
Reported-by: Guanni Qu
Fixes: 0ed893668554 ("liblzma: ARM64 CRC32: Align the buffer faster")
Fixes: 7baf6835cfbf ("liblzma: Speed up CRC32 calculation on 64-bit LoongArch")