SjASMPlus Z80 кросс ассемблер

[Aprisobal]

devpac на амиге: локальные метки == .metka, ограничены обычными. Ещё удобнее, чем цифры only - так как можно и .1 .2 .3 писать, так и .label .metka

В SjASM тоже есть локальные метки. Только, что цифры как локальные метки теперь не поддерживаются - определяются как директива повтора строки (как в Шторм)

так может довести это похожее до ума? имхо цифры менее удобны в качестве мнемонических обозначений...
кроме того остальные плюсы цифровые метки не покрывают

Реализаций данной функции ассемблеров может быть много, например вот как это сделано в WLA DX:

3.3. Labels

Labels are ordinary strings (which can also end to a ':'). Labels starting
with "_" are considered to be local labels and do not show outside sections
where they were defined, or outside object files, if they were not defined
inside a section.

Here are few examples of different labels:

VBI_IRQ:
VBI_IRQ2
_VBI_LOOP:
main:

Note that when you place ':' in front of the label string when referring to
it, you'll get the bank number of the label, instead of the label's address.
Here's an example:

LD A, :LOOP
.BANK 2 SLOT 0
LOOP:

Here "LD A, :LOOP" will be replaced with "LD A, 2" as the label LOOP is
inside the bank number two.

When you are referring to a label and you are adding something to its address
(or subtracting, any arithmetics apply) the result will always be bytes.

.org 20
DATA:  .dw 100, 200, 300
       ld  a, DATA+1
              ^^^^^^ = r

So here the result r will be the address of DATA plus one, here 21. Some x86
assemblers would give here 22 as the result r as DATA points to an array
or machine words, but WLA isn't that smart (and some people including me
think this is the better solution).

You can also use -, --, ---, +, ++, +++, ... as un-named labels.
Labels consisting of '-' are meant for reverse jumps and labels consisting
of '+' are meant for forward jumps. You can reuse un-named labels as much
as you wish inside your source code. Here's an example of this:

    dec e
    beq ++      ; jump -> ?
    dec e
    beq +       ; jump -> %
    ld d, 14
--- ld a, 10    ; !
--  ld b, c     ; #
-   dec b       ; *
    jp nz, -    ; jump -> *
    dec c
    jp nz, --   ; jump -> #
    dec d
    jp nz, ---  ; jump -> !
    ld a, 20
-   dec a       ; $
    jp nz, -    ; jump -> $
+   halt        ; %
++  nop         ; ?

Note that "__" (that's two underline characters) serves also as a un-named
label. You can refer to this label from both directions. Use "_b" when
you are jumping backwards and "_f" when you are jumping forwards label "__".

Example:

   dec e
   jp z, _f     ; jump -> *
   dec e
__ ldi a, (hl)  ; *
   dec e
   jp nz, _b    ; jump -> *