🚀 go-pugleaf

In article <1480@atari.UUCP> apratt@atari.UUCP (Allan Pratt) writes:
>Lastly, AS68 makes at least one illegal optimization.  Assuming that a
>missing size modifier means the same as .w, the optimization
>
>	move #1,d0	-->	moveq.l #1,d0
>
>which AS68 does is illegal.  MadMac does moveq, addq, and subq
>optimization correctly.

Not true (unless you've fixed it recently, Allan).  Take a look at the Bios
and XBios macros in "atari.s" -- they have some pretty icky conditional
assembly to optimize an ADD #n,SP to an ADDQ #n,SP.  Mistakes Were Made.

But [get closer to the campfire, kids -- this is scary] AS68 "optimizes"
MOVE.W #0,D0 (note the explicit .W) to MOVEQ #0,D0.  WUPS!  Erring on the
side of caution is not always a bad thing...

--
Landon Dyer, Apple Computer, Inc.
Development Systems Group (MPW)
Everything I said here is utter nonsense.		Give a little bit.