dasm question

[azure]

Does anyone know if dasm supports a concatenation operator similar to C preprocessor's ## operator?

 

I'd like to be able to do this:

 

.IDX SET 1
    REPEAT 5

.label ## .IDX   ; <--------

    ; code here

.IDX SET .IDX + 1
    REPEND

I could declare a macro and do the same thing, but sometimes I prefer the code to be inline.

 

    MAC INSERT_CODE

.label{1}
        ; code here

    ENDM

; --------------------

.IDX SET 1
    REPEAT 5

        INSERT_CODE .IDX

.IDX SET .IDX + 1
    REPEND

 

Or do you think I should switch to a different assembler or use a C preprocessor?

[+SpiceWare]

.label is a temporary label, it goes hand-in-hand with SUBROUTINE:

 

   REPEAT 5
  SUBROUTINE
.label
 
    ; code here
 
    REPEND

---

 

With that you'll end up with 5 #.labels, along the lines of:

 

1.label

2.label

etc.

 

Search dasm.txt for SUBROUTINE and you'll find more info like:

    The other major feature in this assembler is the SUBROUTINE pseudo-op,
    which logically separates local labels (starting with a dot).  This
    allows you to reuse label names (for example, .1 .fail) rather than
    think up crazy combinations of the current subroutine to keep it all
    unique.

...

	.name	-represents a temporary symbol name.  Temporary symbols
		 may be reused inside MACROS and between SUBROUTINES, but
		 may not be referenced across macros or across SUBROUTINEs.

[azure]

My usage is already inside a subroutine. I was just posting a snippet.

I should put the SUBROUTINE keyword inside the REPEAT?

I have this structure:

Sub SUBROUTINE

    REPEAT 5
.label

    ; some code
    REPEND

    rts

So it should be?

Sub SUBROUTINE

    REPEAT 5
    SUBROUTINE
.label

    ; some code
    REPEND

    rts

Update:

 

It looks like that last one is doing what I wanted.

Edited May 21, 2019 by azure

[+SpiceWare]

I don't know what your goal is, was just pointing out that the <dot><label> format is meant to be used with SUBROUTINE. Without understanding that, you might have tried something like this:

 

    jmp .label
    REPEAT 2
.label
    nop
    REPEND

---

which results in this:

darrell@darrell-VirtualBox:/media/sf_Atari/kaboom_deluxe$ dasm kaboom_deluxe.asm -f3 -v0 -skaboom_deluxe.sym -lkaboom_deluxe.lst -okaboom_deluxe.bin
kaboom_deluxe.asm (2005): error: Label mismatch...
 --> 10.label fa44                  

Unrecoverable error(s) in pass, aborting assembly!

---

or something like this:

    jmp .label
    REPEAT 2
    SUBROUTINE
.label
    nop
    REPEND

---

which results in this:

darrell@darrell-VirtualBox:/media/sf_Atari/kaboom_deluxe$ dasm kaboom_deluxe.asm -f3 -v0 -skaboom_deluxe.sym -lkaboom_deluxe.lst -okaboom_deluxe.bin
--- Unresolved Symbol List
10.label                 0000 ????         (R )
--- 1 Unresolved Symbol 

 

Fatal assembly error: Source is not resolvable.

---

and would get confused as why it didn't work. I put those at the end of Kaboom! Deluxe! to show the errors. By looking at the symbol list kaboom_deluxe.sym, requested via the -s option, we can see dasm converted those instances of .label in the second test to:

10.label                 0000 ????         (R )
11.label                 fa44                  
12.label                 fa45                  

---

10.label = before the REPEND

11.label = first REPEND

12.label = second REPEND