35 lines
1.2 KiB
Ruby
35 lines
1.2 KiB
Ruby
module Register
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# SlotToReg moves data into a register from memory.
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# RegToSlot moves data into memory from a register.
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# Both use a base memory (a register)
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# This is because that is what cpu's can do. In programming terms this would be accessing
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# an element in an array, in the case of SlotToReg setting the value in the array.
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# btw: to move data between registers, use RegisterTransfer
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class SlotToReg < Getter
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# If you had a c array and index offset
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# the instruction would do register = array[index]
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# The arguments are in the order that makes sense for the Instruction name
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# So SlotToReg means the slot (array and index) moves to the register (last argument)
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# def initialize source , array , index , register
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# super
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# end
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# attr_accessor :array , :index , :register
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end
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# Produce a SlotToReg instruction.
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# Array and to are registers or symbols that can be transformed to a register by resolve_to_register
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# index resolves with resolve_index.
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def self.slot_to_reg source , array , index , to
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index = resolve_index( array , index)
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array = resolve_to_register array
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to = resolve_to_register to
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SlotToReg.new( source , array , index , to)
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end
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end
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