On Fri, Oct 01, 2010 at 01:10:11PM +0000, Jilles Tjoelker wrote: > Author: jilles > Date: Fri Oct 1 13:10:11 2010 > New Revision: 213326 > URL: http://svn.freebsd.org/changeset/base/213326 > > Log: > libc: Remove the i386 assembler version of strlen(3). > > On anything modern, the C version, which processes a word at a time, is much > faster. The Intel optimization manual explicitly warns against using REP > prefixes with SCAS or CMPS, which is exactly what the assembler version > does.
there's "rep cmps" in bcmp.S and memcmp.S in both amd64/i386 they both have C counterparts, no idea how fast those are (they are going char by char). does this wisdom apply to those too? _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
