From: viktor DOT lundstrom AT mailbox DOT swipnet DOT se (Viktor Lundstrom)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: ok with negative values in inline asm?
Date: Tue, 26 May 1998 17:47:39 GMT
Organization: A customer of Tele2
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On Sun, 24 May 1998 12:25:13 -0400, Vic <tudor AT cam DOT org> wrote:


>why not just use increment/decrement instructions? (Or do you want to
>add a bigger negative number? )
I'm coding a line routine, and inc/dec will require an extra test in
the inner loop.

>anyways, the code y-=2; outputs addl $-2,%eax so I guess, yes, you can
>use negative numbers.
>
>BTW, group: is there an instruction in ASM for substraction, or just
>addition?
sub?