register variable

From: macluvitch (macluvitch_at_hotmail.com)
Date: 04/30/04 

Date: Fri, 30 Apr 2004 12:02:22 -0400

Hello folks

I often use register variables within functions (or as funcion parameters)
that reauired speed like searching for example . I know that it doesn't
mean that every register variable will be holded in register

so is there any rules to precize when using them
thanks