Torsten Rüger
6aa6b32c50
since it is not an instruction, just a helper also doing this before rewriting slot recursively
48 lines
1.4 KiB
Ruby
48 lines
1.4 KiB
Ruby
module SlotMachine
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class MessageSlot < Slot
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def initialize(slots)
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super(:message , slots)
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end
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def known_name
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:message
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end
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# load the slots into a register
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# the code is added to compiler
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# the register returned
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def to_register(compiler, source)
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type = :Message
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right = compiler.use_reg( type )
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slots = @slots.dup
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left = Risc.message_reg
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left = left.resolve_and_add( slots.shift , compiler)
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reg = compiler.current.register
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while( !slots.empty? )
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left = left.resolve_and_add( slots.shift , compiler)
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end
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return reg
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end
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# load the data in const_reg into the slot that is named by slot symbols
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# actual lifting is done by RegisterValue resolve_and_add
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#
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# Note: this is the left hand case, the right hand being to_register
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# They are very similar (apart from the final reg_to_slot here) and should
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# most likely be united
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def reduce_and_load(const_reg , compiler , original_source )
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left_slots = slots.dup
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raise "Not Message #{object}" unless known_object == :message
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left = Risc.message_reg
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slot = left_slots.shift
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while( !left_slots.empty? )
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left = left.resolve_and_add( slot , compiler)
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slot = left_slots.shift
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end
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compiler.add_code Risc.reg_to_slot(original_source, const_reg , left, slot)
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end
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end
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end
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