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Paul Eggert authored
On Fedora 19 x86-64, the new bswap_64 needs 1 instruction, whereas the old swap64 needed 30. * admin/merge-gnulib (GNULIB_MODULES): Add byteswap. * lib/byteswap.in.h, m4/byteswap.m4: New files, copied from Gnulib. * lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate. * src/fringe.c (init_fringe_bitmap) [WORDS_BIGENDIAN]: * src/sound.c (le2hl, le2hs, be2hl) [!WINDOWSNT]: Use byteswap.h's macros to swap bytes. * src/lisp.h (swap16, swap32, swap64): Remove. All uses replaced by bswap_16, bswap_32, bswap_64.
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