56 lines
2.0 KiB
Ruby
56 lines
2.0 KiB
Ruby
module Mom
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# Base class for MOM instructions
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# At the base class level instructions are a linked list.
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#
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# Mom::Instructions are created by the Vool level as an intermediate step
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# towards the next level down, the Risc level.
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# Mom and Risc are both abstract machines (ie have instructions), so both
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# share the linked list functionality (In Util::List)
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#
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# To convert a Mom instruction to it's Risc equivalent to_risc is called
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#
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class Instruction
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include Util::List
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def initialize( source , nekst = nil )
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@source = source
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@next = nekst
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return unless source
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unless source.is_a?(String) or
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source.is_a?(Vool::Statement)
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raise "Source must be string or Instruction, not #{source.class}"
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end
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end
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attr_reader :source
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# to_risc, like the name says, converts the instruction to it's Risc equivalent.
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# The Risc machine is basically a simple register machine (kind of arm).
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# In other words Mom is the higher abstraction and so mom instructions convert
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# to many (1-10) risc instructions
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#
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# The argument that is passed is a MethodCompiler, which has the method and some
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# state about registers used. (also provides helpers to generate risc instructions)
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def to_risc(compiler)
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raise self.class.name + "_todo"
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end
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end
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end
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require_relative "instruction/label"
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require_relative "instruction/check"
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require_relative "instruction/basic_values"
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require_relative "instruction/simple_call"
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require_relative "instruction/dynamic_call"
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require_relative "instruction/block_yield"
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require_relative "instruction/resolve_method"
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require_relative "instruction/truth_check"
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require_relative "instruction/not_same_check"
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require_relative "instruction/jump"
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require_relative "instruction/return_jump"
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require_relative "instruction/slot_load"
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require_relative "instruction/return_sequence"
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require_relative "instruction/message_setup"
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require_relative "instruction/argument_transfer"
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