29 lines
1022 B
Ruby
29 lines
1022 B
Ruby
module Register
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# GetSlot moves data into a register from memory.
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# SetSlot moves data into memory from a register.
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# Both use a base memory (a register)
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# While the virtual machine has only one instruction (Set) to move data between slots,
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# the register has two, namely GetSlot and SetSlot
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#
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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 GetSlot setting the value in the array.
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# btw: to move data between registers, use RegisterTransfer
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class GetSlot < Instruction
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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 Instruciton name
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# So GetSlot means the slot (array and index) moves to the register (last argument)
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def initialize array , index , register
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@register = register
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@array = array
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@index = index
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end
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attr_accessor :register , :array , :index
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end
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end
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