cvs commit: src/lib/libc/amd64/string Makefile.inc bcmp.S memcmp.S

[David Schultz]

On Fri, Apr 08, 2005, Alan Cox wrote:
> On Fri, Apr 08, 2005 at 05:15:55AM +0000, Alan Cox wrote:
> > alc         2005-04-08 05:15:55 UTC
> > 
> >   FreeBSD src repository
> > 
> >   Modified files:
> >     lib/libc/amd64/string Makefile.inc 
> >   Added files:
> >     lib/libc/amd64/string bcmp.S memcmp.S 
> >   Log:
> >   Add machine-specific, optimized implementations of bcmp and memcmp.
> >   
> >   PR: 73111
> >   Submitted by: Ville-Pertti Keinonen <will at iki.fi> (taken from NetBSD)
> >   MFC after: 3 weeks
> >   
> >   Revision  Changes    Path
> >   1.2       +1 -1      src/lib/libc/amd64/string/Makefile.inc
> >   1.1       +25 -0     src/lib/libc/amd64/string/bcmp.S (new)
> >   1.1       +41 -0     src/lib/libc/amd64/string/memcmp.S (new)
> 
> It is worth noting that by default the current version of gcc
> automatically inlines its own implementation of these functions.  That
> implementation is slower than this new libc implementation for strings
> of non-trivial length.

IIRC, gcc only inlines these in special cases, e.g. if it knows
the length or contents of one of the strings.  But this may have
changed.