Torsten
db5a59f735
Was getting confused myself, where it was instruction or instructions, when if the base class was inside or out of dir. Now dirs are plural, and base class is inside.
33 lines
1.0 KiB
Ruby
33 lines
1.0 KiB
Ruby
module SlotMachine
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# SlotMachine internal check, as the name says to see if two values are not the same
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# In other words, we this checks identity, bit-values, pointers
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#
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# The values that are compared are defined as Slots, ie can be anything
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# available to the machine through frame message or self
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#
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# Acording to SlotMachine::Check logic, we jump to the given label is the values are the same
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#
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class NotSameCheck < Check
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attr_reader :left , :right
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def initialize(left, right , label)
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super(label)
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@left , @right = left , right
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end
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def to_s
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"NotSameCheck: #{left}:#{right}"
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end
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# basically move both left and right values into register
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# subtract them and see if IsZero comparison
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def to_risc(compiler)
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l_reg = left.to_register(compiler, self)
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r_reg = right.to_register(compiler, self)
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compiler.add_code Risc.op( self , :- , l_reg , r_reg)
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compiler.add_code Risc::IsZero.new( self, false_label.risc_label(compiler))
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end
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end
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end
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