''Branching'' to SVC Handler

lo0446 · ‎2014-03-22

Posted on March 22, 2014 at 18:14

MULT

CMP r1, #1

BEQ Finish

ITTT HS

SUBHS r1, #1

MULHS r0, r2

BLHS MULT

Where I currently have ''BEQ Finish'' I wish to call an SVC Handler, how can I do this?

I know I can call an SVC handler with SVC 0 , SVC 1 etc.. but how do I do it conditionally like the above statement? I tried ''BEQ SVC 0'' and I get an unexpected operand statement. Once branching to the handle I never actually want to return to the Multiply function.

Please let me know if what I'm trying to do isn't quite right, I've only just began to learn assembly.

Thanks!

Tesla DeLorean · ‎2014-03-22

Posted on March 23, 2014 at 00:26

How about using an IT instruction

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lo0446 · ‎2014-03-26

Posted on March 26, 2014 at 14:58

Great that worked well, Thanks Clive