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rrthomas / mit

A simple stack-based VM
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Suggested instruction encoding tweak #368

Closed apt1002 closed 4 years ago

apt1002 commented 4 years ago 
xxxxx000 - instruction
xxxxx100 - pushi with a positive operand
xxxxxx10 - pushreli with a positive offset
xxxxxx01 - pushreli with a negative offset
xxxxx011 - pushi with a negative operand
xxxxx111 - instruction

What this gains over the current scheme is that there is no special case for pushreli_M1.