Path: utzoo!utgpu!watmath!clyde!att!ucbvax!unisoft!mtxinu!taniwha!paul
From: paul@taniwha.UUCP (Paul Campbell)
Newsgroups: comp.sys.m68k
Subject: Re: addq.w #n,sp and a pop quiz
Keywords: C asm addq
Message-ID: <310@taniwha.UUCP>
Date: 13 Dec 88 06:43:09 GMT
References: <5005@bsu-cs.UUCP> <5460@cbmvax.UUCP> <1100@ncar.ucar.edu> <670@auspex.UUCP> <1737@oakhill.UUCP>
Reply-To: paul@taniwha.UUCP (Paul Campbell)
Distribution: na
Organization: Taniwha Systems Design, Oakland
Lines: 16

In article <1737@oakhill.UUCP> davet@oakhill.UUCP (David Trissel) writes:
>There is only one place in the instruction set where a data register is
>implicitly sign-extended. Where?

That's easy ... no need to look at the manual - 'movem.w .., <d0>'
on the other hand I've never ever come across a need for this instruction,
I have always guessed it was something some big customer asked Mot. to
put in the 68k early on when everyone thought of it as a 16 bit machine.

	Paul

-- 
Paul Campbell			..!{unisoft|mtxinu}!taniwha!paul (415)420-8179
Taniwha Systems Design, Oakland CA

 	"Read my lips .... no GNU taxes"