Beispiel #1
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;
  }
Beispiel #2
0
 @Override
 public final String generate() {
   return what
       + " "
       + dst.getValue(sizeHelper.getDefaultSize(), sizeHelper)
       + ", "
       + Size.getSizeStr(size)
       + " "
       + src.getValue(size, sizeHelper);
 }
Beispiel #3
0
 public IMul(
     final Register arg1,
     final InstructionArg<X86Instruction, Size> arg2,
     final SizeHelper<X86Instruction, Size> sizeHelper) {
   this(arg1, arg2, sizeHelper.getDefaultSize(), sizeHelper);
 }