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Changelog: ============ * speedup unaligned copies by always using word shifts (in combination with builtin byte swap 64 when available) when bit-endianness and machine byte-order are opposite * add 'HAVE_BUILTIN_BSWAP64' to header * avoid misaligned pointers when casting to '(uint64_t *)' * add tests * simplify 'copy_n()' (remove special cases), see #d2d6fd53 * add [word shift example C program](../examples/shift_r8.c), and simplify 'shift_r8()' * improve documentation and testing * add [roadmap](https://github.com/ilanschnell/bitarray#roadmap) Signed-off-by: Wang Mingyu <wangmy@fujitsu.com> Signed-off-by: Khem Raj <raj.khem@gmail.com>
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