Re: Set a register to 0
From: Bx.C (invalid-email-address_at_invalid.shiragajin)
Date: 04/20/04
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Date: Tue, 20 Apr 2004 14:13:12 +0000 (UTC)
"Bx.C" <invalid-email-address@invalid.shiragajin> wrote in message
news:zECdc.7447$Lh2.3542@bignews1.bellsouth.net...
>
> "Kewoul" <Kewool@Kewool.com> wrote in message
news:4076e4b6$0$18229$626a14ce@news.free.fr...
> > So as to have 0 in BX, I often see things like this :
> >
> > xor bx,bx
> >
> > Why don't they write mov bx, 0 ?
> >
> >
> >
>
> xor bx,bx is coded one byte shorter... and though normally an operation
such as this would have
> a dependency on bx, since this shorter code has been used for years and
years to zero out a
> register, there's no dependency on most processors for the xor
reg_a,reg_a...
>
> this helps?
>
>
now where in the world has this post been? i sent it out over 10 days ago
(Apr 9, @ 14:31 Central time)
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