Elegant...and now we're down to 24 bytes of machine code! Dan, is RISBGZ one of the instructions added to speed up Java garbage collection?
Mike Shaw MVS/QuickRef Support Group Chicago-Soft, Ltd. On Mon, Jan 31, 2022 at 4:08 PM Dan Greiner <dan_grei...@att.net> wrote: > The following code snippet does the trick, leaving the results in general > registers 0 and 1. > > LLC 0,BYTE > RISBGZ 1,0,62,63,-4 > SRL 0,6 > AHI 0,C'1' (or CA'1' for results in ASCII) > AHI 1,C'1' (or CA'1' for results in ASCII) > > (I consider ROTATE THEN INSERT SELECTED BITS to be the sexiest instruction > in the architecture.) >
