topic Make macros for assembler language in Operating System - HP-UX

Make macros for assembler language

Sacha Hnatiuk — Fri, 24 Nov 2000 07:53:09 GMT

I have a short code in asm, and i want to duplicate it a lot of time with minor change.
I found a begin of explication in m4. But i don't have example on my hp server.
I cannot use #define because i need, when the macro is expanded, to repect the asm format:
label opcode opcode_param information
and each line must on separte line (not as C).

Somebody can help me?

Re: Make macros for assembler language

Rainer_1 — Fri, 24 Nov 2000 08:03:22 GMT

save your macro to a file.
Edit with vi you main code.
At every line where you want to insert your macro code do

:r

this inserts the contents of into your vi
Of course this is a manual procedure, hope this is what you need.

Re: Make macros for assembler language

Dan Hetzel — Fri, 24 Nov 2000 08:44:06 GMT

Hi,

Instead of typing
:r file
to insert the file at cursor position from within vi
you could as well use the include statement, like in
#include "you_macro_file"

The disadvantage of these 2 solutions is that the same file will be used.
To allow for minor changes, you should probably modify your initial asm file with some conditional steps like
#ifdef
#else
#endif

Dan

Re: Make macros for assembler language

Andy Bennett — Fri, 24 Nov 2000 10:52:19 GMT

It would be worth your looking at the "Program Structure" section of the "HP Assembler Reference Manual" (available at http://docs.hp.com -> development tools and distributed computing -> Assembler) since this indicates that you can combine several assembly language instructions on the same line by separating them with "!" and using the ".LABEL" directive for the labels.

Re: Make macros for assembler language

Sacha Hnatiuk — Tue, 05 Dec 2000 09:22:06 GMT

To make macro for assembly code, you must:
-put a "!" between each instructions
-put a "\" to change line in the declaration like for C
-Use .LABEL directive to make a LABEL inside the macro and don't add any instruction after: use ! between the label and the instruction.
-To create local label use macro's arguments like the exemple at the end; the #arg will keep the "#" inside the label name!!!!
-Don't forget the "; macro" at the end of the description.

Exemple
#define Toto(var1,var2) .EXPORT label#var1#var2,CODE ! .LABEL label#var1#var2 ! ldi var1,r1 ! ldi var2,r2 ; macro
In source write this:
Toto(13,14)
will create this:
.EXPORT label#13#14,CODE
label#13#14
ldi 13,r1
ldi 14,r2

in c code, add this to know address (and jum perhaps...): extern "C" void label#13#14();

Re: Make macros for assembler language

Sacha Hnatiuk — Tue, 05 Dec 2000 10:10:50 GMT

I said an error about extern directive:
it's impossible, i think, to export in a C source the label, because the "#" cause an error in compilation. But inside assembly code it's work.
But the declaration work fine if you use good declaration like: extern "C" void label_13_14();