/**
* Generates the instructions to load the given method arguments on the stack.
*
* @param arg the index of the first method argument to be loaded.
* @param count the number of method arguments to be loaded.
*/
public void loadArgs(final int arg, final int count) {
int index = getArgIndex(arg);
for (int i = 0; i < count; ++i) {
Type t = argumentTypes[arg + i];
loadInsn(t, index);
index += t.getSize();
}
}
/**
* Generates the instructions to swap the top two stack values.
*
* @param prev type of the top - 1 stack value.
* @param type type of the top stack value.
*/
public void swap(final Type prev, final Type type) {
if (type.getSize() == 1) {
if (prev.getSize() == 1) {
swap(); // same as dupX1(), pop();
} else {
dupX2();
pop();
}
} else {
if (prev.getSize() == 1) {
dup2X1();
pop2();
} else {
dup2X2();
pop2();
}
}
}
/**
* Generates the instructions to box the top stack value. This value is replaced by its boxed
* equivalent on top of the stack.
*
* @param type the type of the top stack value.
*/
public void box(final Type type) {
if (type.getSort() == Type.OBJECT || type.getSort() == Type.ARRAY) {
return;
}
if (type == Type.VOID_TYPE) {
push((String) null);
} else {
Type boxed = type;
switch (type.getSort()) {
case Type.BYTE:
boxed = BYTE_TYPE;
break;
case Type.BOOLEAN:
boxed = BOOLEAN_TYPE;
break;
case Type.SHORT:
boxed = SHORT_TYPE;
break;
case Type.CHAR:
boxed = CHARACTER_TYPE;
break;
case Type.INT:
boxed = INTEGER_TYPE;
break;
case Type.FLOAT:
boxed = FLOAT_TYPE;
break;
case Type.LONG:
boxed = LONG_TYPE;
break;
case Type.DOUBLE:
boxed = DOUBLE_TYPE;
break;
}
newInstance(boxed);
if (type.getSize() == 2) {
// Pp -> Ppo -> oPpo -> ooPpo -> ooPp -> o
dupX2();
dupX2();
pop();
} else {
// p -> po -> opo -> oop -> o
dupX1();
swap();
}
invokeConstructor(boxed, new Method("<init>", Type.VOID_TYPE, new Type[] {type}));
}
}