From: Charles Forsyth <forsyth@terzarima.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] assembler question
Date: Sat, 30 Oct 2004 10:24:18 +0100 [thread overview]
Message-ID: <dbe1c3c67fb6063b162829afb593e6fc@terzarima.net> (raw)
In-Reply-To: <Pine.BSI.4.58.0410291703150.24294@malasada.lava.net>
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be careful that all the plan 9 assemblers always use source -> dest
data flow order for instructions, which can differ from the (sometimes inconsistent)
order used by others. (i quite like this because once you know the rule,
you won't get screwed up writing code for several architectures in the same hour,
as i do, but it needs some attention if you're working from another code sample
where the conventions are different.)
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From: Tim Newsham <newsham@lava.net>
To: Russ Cox <russcox@gmail.com>, Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Cc:
Subject: Re: [9fans] assembler question
Date: Fri, 29 Oct 2004 17:04:11 -1000 (HST)
Message-ID: <Pine.BSI.4.58.0410291703150.24294@malasada.lava.net>
> Looking at /sys/src/cmd/ka/a.y:208, it appears you
> can just say ADDW r2, r3, r4. Have you tried this?
Ahh.. I was trying "ADD R1, $1, R2" but "ADD $1, R1, R2" seems
to have worked. Sorry to raise a false warning.
> Russ
Tim N.
prev parent reply other threads:[~2004-10-30 9:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-30 2:32 Tim Newsham
2004-10-30 2:58 ` Russ Cox
2004-10-30 3:04 ` Tim Newsham
2004-10-30 9:24 ` Charles Forsyth [this message]
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