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