Re: Translating Basic Assembler to C?

On Oct 1, 2:50 pm, glen herrmannsfeldt <g...@[EMAIL PROTECTED]
> wrote:

>    AR R1,R2
>
> to R1 += R2;

Don't forget the condition code -- or you'll have trouble translating
conditional
branches (and a few other things).  In fact, proper CC handling is a
major headache,
except for certain well-behaved programs with single-entry single-exit
blocks of
code and no CC dependencies between blocks.   Depending on how the CC
is handled
(conservatively or aggressively for performance), one also has to
worry about the
difference between logical and arithmetic instructions (ALR vs AR);
indeed, the
C-level CC should probably have more than two bits to deal with this
effectively.

The real problem is control flow dependency -- in general, you may not
be able to
analyze control flow completely, so you may have to handle the CC
conservatively
more often than you'd like.

Michel.