37 lines
985 B
Ruby
37 lines
985 B
Ruby
module Register
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# transfer the constents of one register to another.
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# possibly called move in some cpus
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# There are other instructions to move data from / to memory, namely GetSlot and SetSlot
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# Get/Set Slot move data around in vm objects, but transfer moves the objects (in the machine)
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#
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# Also it is used for moving temorary data
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#
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class RegisterTransfer < Instruction
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# initialize with from and to registers.
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# First argument from
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# second argument to
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#
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# Note: this may be reversed from some assembler notations (also arm)
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def initialize source , from , to
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super(source)
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@from = from
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@to = to
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raise "Fix me #{from}" unless from.is_a? RegisterValue
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raise "Fix me #{to}" unless to.is_a? RegisterValue
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end
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attr_reader :from, :to
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def to_s
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"RegisterTransfer: #{from} -> #{to}"
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end
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def self.transfer source , from , to
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RegisterTransfer.new source , from , to
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end
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end
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end
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