Re: SV: C style assignment of variable values

[Jim Langston <jlangston@xxxxxxxxxxxxxxxx>]

A++ compiles to a faster CPU instruction to something like:
MOV AX,[A]
INC A
MOV [A],AX

Not sure if A += 1 would compile faster or not
A = B + 1 would compile to something like
MOV AX,[B]
MOV BX,1
ADD AX,BX
MOV AX,[A]

That was quite a while ago. though (80286) and not sure if they now allow
you to add directly to a memory location.  Perhaps (not sure) it would compile
to:
MOVE AX,1
ADD [A], AX

and be done with it.

I'm not up to par with the newest OP codes.  But I think they allow things like
that now.  I'm just not sure.  Any AS/400 Assembly language programmers here?
Or even Pentium Assembly language programmers.

Regards,

Jim Langston

Chris Bipes wrote:

> I also agree with KISS.  Yes too many choices and one can get lost.  I have
> been learning C lately and had a hard time with the A+=1.  Why not code
> A=A+1?  Does the compiler use a faster CPU instruction with the C syntax?
> Is it more efficient processing?  I like the pointers, procedures and other
> C type functions that have been added to RPG, but let not make RPG into C.
> Both languages have their place.  I agree that if you need the functions of
> C then buy a C compiler and program in C.  Or have someone write the C
> routines for you and give you a service program that you can bind to your
> RPG.
>

<SNIP>

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