fast string copy

[Col. G. L. Sicherman]

["In the service of Virman Vundabar we learn perfection!"]

> I think this is cute, how VAX/VMS beats Unix at its own game.  The VMS C
> compiler generates code as good as or better than anything I have seen posted
> so far!
> 
> 	char *s,*t;
> 	while (*s++ = *t++);
> 
> generates (on a VAX 780):
> 
> 		movb	(r2)+,(r1)+
> 		beql	sym.2
> 	sym.1:
> 		movb	(r2)+,(r1)+
> 		bneq	sym.1
> 	sym.2:
> 
> This is as fast as you can get.

Careful!  You can probably speed it up by unrolling the loop....
-- 
Col. G. L. Sicherman
...{rocksvax|decvax}!sunybcs!colonel