47 lines
1.0 KiB
Ruby
47 lines
1.0 KiB
Ruby
module Arm
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# The arm machine has following instruction classes
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# - Memory
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# - Stack
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# - Logic
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# - Math
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# - Control/Compare
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# - Move
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# - Call class Instruction
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module Attributed
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attr_reader :attributes
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def opcode
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@attributes[:opcode]
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end
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def set_opcode code
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@attributes[:opcode] = code
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end
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# for the shift handling that makes the arm so unique
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def shift val , by
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raise "Not integer #{val}:#{val.class} #{inspect}" unless val.is_a? Fixnum
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val << by
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end
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def condition_code
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shift(cond_bit_code , 28 )
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end
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def instruction_code
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shift(instuction_class , 26)
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end
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def byte_length
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4
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end
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end
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end
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require_relative "constants"
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require_relative "instructions/call_instruction"
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require_relative "instructions/compare_instruction"
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require_relative "instructions/logic_instruction"
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require_relative "instructions/memory_instruction"
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require_relative "instructions/move_instruction"
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require_relative "instructions/stack_instruction"
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