[A83] Re: Quick quistion about djnz

To: <assembly-83@lists.ticalc.org>
Subject: [A83] Re: Quick quistion about djnz
From: "David Phillips" <david@acz.org>
Date: Thu, 15 Nov 2001 16:55:22 -0700
References: <F1808qHCnfa0dDjpqAz00004b69@hotmail.com>
Reply-To: assembly-83@lists.ticalc.org


Everyone says "speed is important", but very rarely is it really important.
If two t-states are going to be called 100,000 times a frame, then maybe
it's important, otherwise, no.  And in this case, it's not faster anyway:

 djnz label   ; 13

 dec b          ; 4
 jp nz,label   ; 10
                   ; = 14

> If you use a djnz loop, does it then jp or jr?
> Speed is important, so if it does jp then maybe it is faster to do
>
>   dec b
>   jr nz,label
>
>
> rather than djnz ??

References:

[A83] Quick quistion about djnz

From: "TypeR unknown" <typerfuture@hotmail.com>

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