opnsense-src/lib/libc/i386/string/Makefile.inc at c66ca7723bd8d7248f013804ce3bc8ddf75da170 - upstream/opnsense-src - Forgejo: Beyond coding. We Forge.

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Jilles Tjoelker 220856f376 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.

A simple test on a Phenom II showed the C version, compiled with -O2, to be
about twice as fast determining the length of 100000 strings between 0 and
255 bytes long.

MFC after:	2 weeks

2010-10-01 13:10:11 +00:00

7 lines

263 B

Makefile

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 #	@(#)Makefile.inc	8.1 (Berkeley) 6/4/93
 # $FreeBSD$
 MDSRCS+=bcmp.S bcopy.S bzero.S ffs.S index.S memchr.S memcmp.S memcpy.S \
 	memmove.S memset.S rindex.S strcat.S strchr.S strcmp.S strcpy.S \
 	strncmp.S strrchr.S swab.S wcschr.S wcscmp.S wcslen.S \
 	wmemchr.S