[virtmach] instruction set

[Dennis Yelle]

thaddaeus.frogley@creaturelabs.com wrote:
> 
> Hi,
> 
> Quick question.  Don't feel obliged to justify your answer.
> 
> When trying to create an instruction set for a 3 address machine, assuming
> that the following already exist:
> 
>   jump target
>   jump-if-zero a,target
>   jump-if-non-zero a,target

Well, assuming I already have:

subtract a,b,c
jump-if-negative a, target

And assuming I am short of op code space,
I don't need any of these:

>   jump-if-equal a,b,target
>   jump-if-less a,b,target
>   test-if-equal a,b,result
>   test-if-less a,b,result