Re: A92: Addressing mode

To: assembly-92@lists.ticalc.org
Subject: Re: A92: Addressing mode
From: jean-baptiste-andre canazzi <Jean-Baptiste-Andre.Canazzi@epita.fr>
Date: Mon, 29 Mar 1999 13:19:58 +0000 (GMT)
Delivered-To: assembly-92-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-92@lists.ticalc.org
Function: Computer Science Student
In-Reply-To: <3.0.32.19990329124736.00926b40@master.eif.ch> from "Sudan Christoph" at Mar 29, 99 12:47:37 pm
Operating-System: definitely UNIX
Organization: Epita (French Computer Science school)
Postal-Address: 14 rue voltaire, 94270 kremlin bicêtre
Reply-To: assembly-92@lists.ticalc.org


According to Sudan Christoph:
> 
> 
> I've just a question concerning the addressing modes.
> I already asked  Keith Kirton. He told me tat there 
> must be a bug in the compiler A68k. If someone is 
> able to give me an answer, pleas read the following
> explication.
> 
> My problem concern the indexed addressing mode with
> a data register:
> 
> 	LEA (A5,D7.w),A5
> 

Maybe you should try to put everything in lowercase. Try this :
	lea (a5,d7.w),a5



> The compiler isn't able to create the right object
> code!
> 
> A little program for illustrate it:
> ;****************************
> 	xdef _main
> 	xdef _comment
> _main:
> 	LEA (A5,D7.w),A5
> 	Move.w (A5),D4
> 	Move.w D4,D5
> 	RTS
> _comment:
> 	dc.b "TryOut",0
> 	END
> ;****************************
> 
> Look at the following object code created by the A86k.exe:
> 
> ;ooooooooooooooooooooooooooooooooooo
>   ç      è         é   Kù    
> 8:Nu4I`üVersuch   ï  _main
>          _comment     A5,D7.w 
>             ò
> ;ooooooooooooooooooooooooooooooooooo
> 
> I know it's absolutely normal that nobody understand it
> (without an object code list and hex editor!!) . The only
> thing possible to read are the labels _main and _comment 
> and the file name VERSUCH.ASM (-> normal!?), and finaly the
> expression A5,D7.w. It's evident, this expression can't be 
> object code.
> 
> If somebody know to fix this bug please mail me!
> 
> Thank you for your patience.
> 
> Sudan Christoph
> e-mail: e98csuda@eif.ch
> 
> If you prefer it, you can mail me in French or German too:)
> 
> 
>

References:

A92: Addressing mode

From: Sudan Christoph <e98csuda@eif.ch>