예제 #1
0
  @Override
  public InstructionsAndTiming<T> generate(
      final InstanceOfExprSymbol op, final Platform<T, E> platform) {

    final InstructionsAndTiming<T> instructions = new InstructionsAndTiming<T>();
    final SizeHelper<T, E> sizeHelper = platform.getSizeHelper();
    final TileHelper<T, E> tileHelper = platform.getTileHelper();

    instructions.addAll(platform.getBest(op.getLeftOperand()));
    // eax should have reference to object
    final String nullObjectLbl = "nullObject" + CodeGenVisitor.getNewLblNum();
    tileHelper.setupJmpNull(nullObjectLbl, sizeHelper, instructions);

    instructions.addAll(
        platform.getObjectLayout().subtypeCheckCode((TypeSymbol) op.getRightOperand(), platform));

    final String endLbl = "instanceOfEnd" + CodeGenVisitor.getNewLblNum();
    tileHelper.setupJump(endLbl, sizeHelper, instructions);

    tileHelper.setupLbl(nullObjectLbl, instructions);
    tileHelper.setupComment("set to false", instructions);
    tileHelper.loadBool(false, instructions, sizeHelper);

    tileHelper.setupLbl(endLbl, instructions);
    return instructions;
  }
예제 #2
0
  @Override
  public InstructionsAndTiming<ArmInstruction> generate(
      final ArrayAccessExprSymbol arrayAccess, final Platform<ArmInstruction, Size> platform) {

    final InstructionsAndTiming<ArmInstruction> instructions =
        new InstructionsAndTiming<ArmInstruction>();
    final SizeHelper<ArmInstruction, Size> sizeHelper = platform.getSizeHelper();
    final ObjectLayout<ArmInstruction, Size> objectLayout = platform.getObjectLayout();
    final IRuntime<ArmInstruction> runtime = platform.getRunime();

    instructions.add(new Comment("Accessing array"));
    instructions.addAll(platform.getBest(arrayAccess.children.get(0)));

    platform.getTileHelper().setupJmpNull(IRuntime.EXCEPTION_LBL, sizeHelper, instructions);

    instructions.add(new Push(Register.R8));
    instructions.add(new Mov(Register.R8, Register.R0, sizeHelper));
    instructions.addAll(platform.getBest(arrayAccess.children.get(1)));

    instructions.add(new Comment("Checking element >= 0"));
    final long myVal = CodeGenVisitor.getNewLblNum();
    String ok = "arrayAccessP1Ok" + myVal;
    instructions.add(new Eor(Register.R1, Register.R1, Register.R1, sizeHelper));
    instructions.add(new Cmp(Register.R0, Register.R1, sizeHelper));
    instructions.add(new B(Condition.GE, ok));
    runtime.throwException(instructions, "Invalid array access");
    instructions.add(new Label(ok));

    ok = "arrayAccessOk" + myVal;
    instructions.add(
        new Ldr(
            Register.R3,
            Register.R8,
            new Immediate12((short) platform.getObjectLayout().objSize()),
            sizeHelper));
    instructions.add(new Cmp(Register.R3, Register.R0, sizeHelper));

    instructions.add(new B(Condition.GT, ok));
    runtime.throwException(instructions, "Invalid array access");
    instructions.add(new Label(ok));

    final Size elementSize =
        sizeHelper.getPushSize(sizeHelper.getSizeOfType(arrayAccess.getType().value));
    if (elementSize != Size.B && elementSize != Size.SB) {
      instructions.add(
          new Mov(
              Register.R0,
              new ConstantShift(Register.R0, ArmSizeHelper.getPowerSizeImd(elementSize), Shift.LSL),
              sizeHelper));
    }

    final Immediate8 offset =
        new Immediate8((char) (objectLayout.objSize() + sizeHelper.getDefaultStackSize()));
    instructions.add(new Add(Register.R0, Register.R0, offset, sizeHelper));

    return instructions;
  }
예제 #3
0
  @Override
  public InstructionsAndTiming<ArmInstruction> generate(
      final CastExpressionSymbol symbol, final Platform<ArmInstruction, Size> platform) {

    final TypeSymbol type = symbol.getType();
    final InstructionsAndTiming<ArmInstruction> instructions =
        new InstructionsAndTiming<ArmInstruction>();
    final String castExprEnd = "CastExprEnd" + CodeGenVisitor.getNewLblNum();
    final SizeHelper<ArmInstruction, Size> sizeHelper = platform.getSizeHelper();

    instructions.addAll(platform.getBest(symbol.getOperandExpression()));
    platform.getTileHelper().setupJmpNull(castExprEnd, sizeHelper, instructions);
    instructions.add(new Push(Register.R0));
    instructions.addAll(platform.getObjectLayout().subtypeCheckCode(type, platform));
    platform.getTileHelper().setupJumpNe(IRuntime.EXCEPTION_LBL, sizeHelper, instructions);
    instructions.add(new Pop(Register.R0));
    instructions.add(platform.makeLabel(castExprEnd));

    return instructions;
  }