Only allow arithmetic instructions to use the general purpose registers

Question

Only allow arithmetic instructions to use the general purpose registers

frodare opened this issue 7 years ago · 3 comments

frodare commented 7 years ago

frodare · Answer 1 · 2017-09-21T11:59:07.000Z

This would be more realistic, but maybe just add annoyance for people learning assembly?

For instance, this example circuit would need to additional lines.

mov ports, 0010b
start:
cmp pb, 0 ;FAIL
jz start
mov pf, 1
mov pf, 0
mov pf, 1
mov pf, 0
wait:
cmp pb, 1 ;FAIL
jz wait
jmp start

josephcsible · Answer 2 · 2017-09-21T12:04:32.000Z

I'm personally not a fan of this idea, due to it making programs more complicated as you mentioned, plus because CISC architectures are a thing, so this doesn't really make it more realistic.

frodare · Answer 3 · 2017-09-21T12:13:53.000Z

Thanks for the input, I was torn on this one. That reminds me I totally forgot about memory addressing, which would be a better use of time.

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