39 lines
1.1 KiB
Ruby
39 lines
1.1 KiB
Ruby
module Risc
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# load a constant into a register
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#
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# first is the actual constant, either immediate register or object reference (from the space)
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# second argument is the register the constant is loaded into
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class LoadConstant < Instruction
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def initialize( source , constant , register)
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super(source)
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@register = register
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@constant = constant
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raise "Not Constant #{constant}" if constant.is_a?(SlotMachine::SlotDefinition)
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raise "Not register #{register}" unless RegisterValue.look_like_reg(register)
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end
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attr_accessor :register , :constant
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def to_s
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class_source "#{register} <- #{constant_str}"
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end
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private
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def constant_str
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case @constant
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when String , Symbol
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@constant.to_s
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else
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if( @constant.respond_to? :rxf_reference_name )
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constant.rxf_reference_name
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else
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constant.class.name.to_s
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end
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end
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end
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end
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def self.load_constant( source , constant , register )
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LoadConstant.new( source , constant , register )
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end
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end
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