Package serp.bytecode

Class WideInstruction

All Implemented Interfaces:
BCEntity, VisitAcceptor

public class WideInstruction extends LocalVariableInstruction
The wide instruction, which is used to allow other instructions to index values beyond what they can normally index baed on the length of their arguments.
  • Field Details

    • _mappings

      private static final Class[][] _mappings
    • _ins

      private int _ins
    • _inc

      private int _inc
  • Constructor Details

    • WideInstruction

      WideInstruction(Code owner)
  • Method Details

    • getLength

      int getLength()
      Description copied from class: Instruction
      Return the length in bytes of this opcode, including all arguments. For many opcodes this method relies on an up-to-date byte index.
      Overrides:
      getLength in class Instruction
    • getStackChange

      public int getStackChange()
      Description copied from class: Instruction
      Return the number of stack positions this instruction pushes or pops during its execution.
      Overrides:
      getStackChange in class Instruction
      Returns:
      0 if the stack is not affected by this instruction, a positive number if it pushes onto the stack, and a negative number if it pops from the stack
    • getLogicalStackChange

      public int getLogicalStackChange()
      Description copied from class: Instruction
      Return the logical number of stack positions changed by this instruction. In other words, ignore weirdness with longs and doubles taking two stack positions.
      Overrides:
      getLogicalStackChange in class Instruction
    • getTypeName

      public String getTypeName()
      Description copied from class: TypedInstruction
      Return the type name for this instruction. If the type has not been set, this method will return null.
      Overrides:
      getTypeName in class LocalVariableInstruction
    • setType

      public TypedInstruction setType(String type)
      Description copied from class: TypedInstruction
      Set the type of this instruction. Types that have no direct support will be converted accordingly.
      Overrides:
      setType in class LocalVariableInstruction
      Returns:
      this instruction, for method chaining
    • getInstruction

      public int getInstruction()
      Return the opcode of the instruction to modify; this will return one of the constants defined in Constants.
    • setInstruction

      public WideInstruction setInstruction(Instruction ins)
      Set the type of instruction this wide instruction modifies.
    • setInstruction

      public WideInstruction setInstruction(int opcode)
      Set the type of instruction this wide instruction modifies.
    • iinc

      public WideInstruction iinc()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • ret

      public WideInstruction ret()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • iload

      public WideInstruction iload()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • fload

      public WideInstruction fload()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • aload

      public WideInstruction aload()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • lload

      public WideInstruction lload()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • dload

      public WideInstruction dload()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • istore

      public WideInstruction istore()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • fstore

      public WideInstruction fstore()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • astore

      public WideInstruction astore()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • lstore

      public WideInstruction lstore()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • dstore

      public WideInstruction dstore()
      Set the type of instruction this wide instruction modifies.
      Returns:
      this instruction, for method chaining
    • getIncrement

      public int getIncrement()
      Return the increment for this instruction if it augments IINC, or -1 if unset.
    • setIncrement

      public WideInstruction setIncrement(int val)
      Set the increment on this instruction if it augments IINC.
      Returns:
      this Instruction, for method chaining
    • equalsInstruction

      public boolean equalsInstruction(Instruction other)
      WideInstructions are equal if the instruction they augment is the same or unset.
      Overrides:
      equalsInstruction in class LocalVariableInstruction
    • acceptVisit

      public void acceptVisit(BCVisitor visit)
      Description copied from interface: VisitAcceptor
      Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.
      Specified by:
      acceptVisit in interface VisitAcceptor
      Overrides:
      acceptVisit in class Instruction
    • read

      void read(Instruction orig)
      Description copied from class: Instruction
      Copy the given instruction data.
      Overrides:
      read in class LocalVariableInstruction
    • read

      void read(DataInput in) throws IOException
      Description copied from class: Instruction
      Read the arguments for this opcode from the given stream. This method should be overridden by opcodes that take arguments.
      Overrides:
      read in class Instruction
      Throws:
      IOException
    • write

      void write(DataOutput out) throws IOException
      Description copied from class: Instruction
      Write the arguments for this opcode to the given stream. This method should be overridden by opcodes that take arguments.
      Overrides:
      write in class Instruction
      Throws:
      IOException