/**
* Optimizations for OP_convert_d: convert_d, convert_d -> convert_d pushbyte n, convert_d ->
* pushdouble n pushint n, convert_d -> pushdouble n pushuint n, convert_d -> pushdouble n
* pushdouble n, convert_d -> pushdouble n pushnan, convert_d -> pushnan lf32, convert_d -> lf32
* lf64, convert_d -> lf64
*
* @param i The convert_d instruction
*/
private void op_convert_d(InstructionInfo i) {
InstructionInfo prev = previous(1);
switch (prev.getOpcode()) {
case OP_pushbyte:
{
// replace pushbyte, convert d with pushdouble - should be faster
replace(
1,
InstructionFactory.getInstruction(
OP_pushdouble, new Double(convertByteImmediateToDouble(prev.getImmediate()))));
break;
}
case OP_pushint:
case OP_pushuint:
{
// replace pushint , convert d with pushdouble - should be faster
replace(
1,
InstructionFactory.getInstruction(
OP_pushdouble, new Double(((Number) prev.getOperand(0)).doubleValue())));
break;
}
case OP_pushdouble:
case OP_pushnan:
case OP_lf32:
case OP_lf64:
case OP_convert_d:
{
// result is already a double, just erase the op_convert_d
delete(0);
break;
}
default:
{
// nothing to do - instruction has already been added
}
}
}
/** Optimizations for OP_getlocal: setlocal N, getlocal N -> dup, setlocal N */
private void OP_getlocal(InstructionInfo i) {
InstructionInfo prev = previous(1);
InstructionInfo cur = previous(0);
switch (prev.getOpcode()) {
case OP_setlocal:
{
if (cur.getInstruction().getImmediate() != prev.getInstruction().getImmediate())
break; // set,get of different locals
Instruction[] newInsns = {
InstructionFactory.getInstruction(OP_dup), prev.getInstruction()
};
replace(1, newInsns);
break;
}
default:
{
// nothing to do, instruction has already been added
}
}
}
@Override
public void visitInstruction(int opcode, Object single_operand) {
visitInstruction(InstructionFactory.getInstruction(opcode, single_operand));
}
@Override
public void visitInstruction(int opcode, Object[] operands) {
visitInstruction(InstructionFactory.getInstruction(opcode, operands));
}
@Override
public void visitInstruction(int opcode, int immediate_operand) {
visitInstruction(InstructionFactory.getInstruction(opcode, immediate_operand));
}
@Override
public void visitInstruction(int opcode) {
visitInstruction(InstructionFactory.getInstruction(opcode));
}
