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Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!sdcrdcf!trw-unix!scgvaxd!qsi03!achut
From: achut@qsi03.UUCP (Achut Reddy)
Newsgroups: net.micro.68k
Subject: Re: Godless 68000 instruction set - (nf)
Message-ID: <169@qsi03.UUCP>
Date: Thu, 22-Dec-83 20:00:00 EST
Article-I.D.: qsi03.169
Posted: Thu Dec 22 20:00:00 1983
Date-Received: Tue, 27-Dec-83 00:25:22 EST
Organization: Quotron Systems, Marina Del Rey, CA
Lines: 33

You ain't kidding brother!!!!

Here are a few more 68000 bogosities for you:

How to double the value in a data register?

Now, no one would even think of using:
	mulu	#0,d0
since it's common knowledge that the fastest way to multiply
by a power of 2 is by shifting:
	asl.l	#1,d0
But the following is even faster:
	add.l	d0,d0	(!)

Also, how many machines do you know where the time to shift is a linear
function of the shift count??

Did you know that
	bra	<16-bit displacement>
is slower than
	jmp	a0@
and takes up twice as much space!

WHY ISN'T THERE A 32-BIT MULTIPLY AND DIVIDE???  EVEN *MIX* HAS THEM!

chk (check register against bounds) is a very nice instruction.  It
could ACTUALLY BE USED if the dummkopf just set condition codes instead
of initiating exception processing!

Anyway, that's enough exclamation marks for one day...
-- 
				Achut Reddy
				sdcrdcf!trw-unix!scgvaxd!qsi03!achut