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- Newsgroups: comp.sys.m68k
- From: apelled@cix.compulink.co.uk (Adam Pelled)
- Subject: Re: 68000, Fast 14 Bit Shift?
- Reply-To: apelled@cix.compulink.co.uk
- Date: Sun, 8 Nov 1992 19:50:00 +0000
- Message-ID: <memo.737085@cix.compulink.co.uk>
- Sender: usenet@gate.demon.co.uk
- Lines: 25
-
-
- In article <568@muller.loria.fr>, eker@loria.crin.fr (Steven Eker) writes:
- >In article <memo.723415@cix.compulink.co.uk>, apelled@cix.compulink.co.uk (Adam Pelled) writes:
- >
- >|>
- >|> > suba.l a2,a2 ; clear extracted count
- >|>
- >|> That's a neat trick :-)
- >
- >Why the smiley? how else can you clear an address reg?
-
- It was a way of saying thank-you.
-
- >|> Thanks for the tips. i'll use them in my code if you don't mind. As Tom
- >|> Lane pointed out to me in mail; this problem is i/o bound and so there is
- >|> little point in optimising the code.
- >
- >I wondered about this but it depends whether you're decoding from floppy, hard
- >diskor RAM disk. If you don't need efficiency, don't in code asm in the first
- >place - unless like me you consider optimising asm as a substitute for
- >crossword puzzles :-)
-
- It seemed like a good idea at the time :-)
-
- Adam.
-