What I meant was:
MACRO ,
MYCLC &P1,&P2
LCLC &C
&C SETC '&SYSNDX'
DSECT ,
MY&C DS CL2
&SYSECT CSECT ,
PUSH USING
USING MY&C,&P1
CLC MY&C,&P2
POP USING
MEND ,
However, it fails on
46 MYCLC 24(R3),ZERO
000006 00000 00008 47+ DSECT ,
000006 48+MY0004 DS CL2
000024 00000 00034 49+ CSECT ,
50+ PUSH USING
51+ USING MY0004,24(R3)
** ASMA145E Operator, right parenthesis, or end-of-expression expected - (R3)
Not sure why the assembler doesn't accept this relocatable expression.
On Mon, 26 Feb 2024 10:55:31 -0500 David Eisenberg <[email protected]>
wrote:
:>Benjamin,
:>
:>I'm really struggling to understand... how would I use a DSECT and USING to
solve this? I can certainly generate those in the macro, but I don't see the
technique in this case.
:>
:>David
:>
:>On Mon, 26 Feb 2024 17:14:19 +0200, Binyamin Dissen
<[email protected]> wrote:
:>
:>>Generate a DSECT and USING.
:>>
:>>On Mon, 26 Feb 2024 08:22:00 -0500 David Eisenberg
<[email protected]>
:>>wrote:
:>>
:>>:>I?m seeking some guidance if anyone is able to help. I?d like to write a
macro like this:
:>>:>
:>>:>&NAME MYCLC &FIELD1,&FIELD2
:>>:>
:>>:>in which both &FIELD1 and &FIELD2 are relocatable addresses. It?s &FIELD1
that is of particular interest to me. &FIELD1 might be expressed as a
hard-coded displacement and base register, or a relocatable symbol? or it could
be an absolute symbol equivalent to a displacement, followed by a base
register? etc. I.e., it could be any valid relocatable address syntax. What
&FIELD1 will *not* have is an *explicit length.* The macro parameters will
specify valid relocatable addresses, and nothing more.
:>>:>
:>>:>My question: I?d like the MYCLC macro to generate a CLC instruction in
which the two parameters are compared to each other for a constant length of 2.
So far, the only ways I can think of to do this are:
:>>:>
:>>:>1. Parse &FIELD1 to figure out how the relocatable address is expressed,
and insert an explicit length of 2 to generate a valid CLC first operand. I
would do it that way, but (unless I'm missing something) it seems quite complex
to code.
:>>:>2. Generate this DC statement: DC X?D501?,S(&FIELD1,&FIELD2) . This seems
to work, but it?s a bit unattractive in a PRINT GEN (and it looks a bit odd in
the assembly listing, because the assembler doesn't treat it like a machine
instruction in the object code on the left side of the listing).
:>>:>
:>>:>I?m wondering if anyone can suggest a reasonable way to code option 1
above. Can the macro assembler give me any help in parsing &FIELD1 so that I
can transform that parameter to insert an explicit length, regardless of how
&FIELD1 is expressed? Or is there some other approach that I haven?t considered
at all? Or should I just go with option 2 above?
:>>:>
:>>:>Please note that I don?t want the macro to generate more than one machine
instruction. One way or another, I just want the macro to generate a CLC for a
length of 2. (And I really do want the CLC located in the macro as opposed to
open code, because the macro does some analysis on the comparands prior to
generating the CLC.)
:>>:>
:>>:>Any advice would be appreciated... thank you!
:>>:>
:>>:>David
:>>
:>>--
:>>Binyamin Dissen <[email protected]>
:>>http://www.dissensoftware.com
:>>
:>>Director, Dissen Software, Bar & Grill - Israel
--
Binyamin Dissen <[email protected]>
http://www.dissensoftware.com
Director, Dissen Software, Bar & Grill - Israel
