Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!apple!bionet!agate!pasteur!ucbvax!hplabs!hpda!hpcupt1!hpisod1!renglish
From: renglish@hpisod1.HP.COM (Robert English)
Newsgroups: comp.lang.c
Subject: Re: Hand optimized copying
Message-ID: <10130002@hpisod1.HP.COM>
Date: 17 Oct 88 17:02:25 GMT
References: <34421@XAIT.Xerox.COM>
Organization: Hewlett Packard, Cupertino
Lines: 17

/ g-rh@XAIT.Xerox.COM (Richard Harter) /  2:38 pm  Oct  7, 1988 /

> #define copy(dest,src,nb) {register char *a, *b; register int i;\
> a = dest; b = src;\
> for (i = (nb %7)+1; --i;) *a++ = *b++;\
> for (i = (nb>>3)+1; --i>0;) {\
> *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++;\
> *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++;\
> }}

Methinks that line 3 should read:

for (i = (nb & 07) + 1; --i;)...

( or " % 8" )

--bob--