/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Eclipse Public License (EPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.jikesrvm.compilers.opt.ir.ppc;
import org.jikesrvm.compilers.opt.ir.GenericPhysicalRegisterTools;
import org.jikesrvm.compilers.opt.ir.operand.RegisterOperand;
/**
* This abstract class provides a set of useful methods for
* manipulating physical registers for an IR.
*/
public abstract class PhysicalRegisterTools extends GenericPhysicalRegisterTools {
/**
* Create a condition register operand for a given register number.
* To be used in passthrough expressions like
* <pre>
* ... Binary.create(INT_CMP, CR(2), I(1), IC(4)) ...
* </pre>
*
* @param regnum the given condition register number
* @return condition register operand
*/
protected final RegisterOperand CR(int regnum) {
PhysicalRegisterSet phys = getIR().regpool.getPhysicalRegisterSet();
return CR(phys.getConditionRegister(regnum));
}
}