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CVS commit: src/common/lib/libc/arch/x86_64/string
Module Name: src
Committed By: dsl
Date: Sat Aug 1 20:35:46 UTC 2009
src/common/lib/libc/arch/x86_64/string: bzero.S memset.S
Remove some long dependant instruction sequences (ie allow parallel code).
Since 'rep stos' will have a long setup time, avoid doing it more than once.
For misaligned (start address or length) write an unaligned word at both
ends of the buffer then aligned 'rep stosd' the middle.
Use the same code for bzero().
bzero.S is left being compiled for a while (empty) - to avoid issues with
duplicate symbols in libc.a after update builds.
To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/common/lib/libc/arch/x86_64/string/bzero.S \
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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