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authorRich Felker <dalias@aerifal.cx>2012-09-10 18:16:11 -0400
committerRich Felker <dalias@aerifal.cx>2012-09-10 18:16:11 -0400
commit1701e4f3d46b14c4c4be8a46e64f8eaf15a5c061 (patch)
treeff00b3c7db479c467be152984b9ec4ea4d3e4cec /src/errno
parent3b5e69052a867e9d99cf4c655d775bd06e3437f1 (diff)
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reenable word-at-at-time copying in memmove
before restrict was added, memove called memcpy for forward copies and
used a byte-at-a-time loop for reverse copies. this was changed to
avoid invoking UB now that memcpy has an undefined copying order,
making memmove considerably slower.

performance is still rather bad, so I'll be adding asm soon.
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