Class: Tataru::Instructions::CallInstruction

Inherits:
ImmediateModeInstruction show all
Defined in:
lib/tataru/instructions/call_instruction.rb

Overview

pushes the callstack and branches

Instance Attribute Summary

Attributes inherited from Tataru::Instruction

#memory

Instance Method Summary collapse

Methods inherited from ImmediateModeInstruction

#initialize

Methods inherited from Tataru::Instruction

#execute, expects

Constructor Details

This class inherits a constructor from Tataru::Instructions::ImmediateModeInstruction

Instance Method Details

#run ⇒ Object 



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# File 'lib/tataru/instructions/call_instruction.rb', line 7

def run
  labels = memory.hash[:labels]
  unless labels.key? @param
    memory.error = 'Label not found'
    return
  end

  memory.call_stack.push(memory.program_counter)
  memory.program_counter = labels[@param] - 1
end