Mercurial > hg > graal-jvmci-8
diff graal/Compiler/src/com/sun/c1x/ir/Op2.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/Compiler/src/com/sun/c1x/ir/Op2.java Wed Apr 27 11:43:22 2011 +0200 @@ -0,0 +1,107 @@ +/* + * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package com.sun.c1x.ir; + +import com.sun.c1x.util.*; +import com.sun.cri.bytecode.*; +import com.sun.cri.ci.*; + +/** + * The {@code Op2} class is the base of arithmetic and logic operations with two inputs. + * + * @author Ben L. Titzer + */ +public abstract class Op2 extends Instruction { + + /** + * The opcode of this instruction. + */ + public final int opcode; + + Value x; + Value y; + + /** + * Creates a new Op2 instance. + * @param kind the result type of this instruction + * @param opcode the bytecode opcode + * @param x the first input instruction + * @param y the second input instruction + */ + public Op2(CiKind kind, int opcode, Value x, Value y) { + super(kind); + this.opcode = opcode; + this.x = x; + this.y = y; + } + + /** + * Gets the first input to this instruction. + * @return the first input to this instruction + */ + public final Value x() { + return x; + } + + /** + * Gets the second input to this instruction. + * @return the second input to this instruction + */ + public final Value y() { + return y; + } + + /** + * Swaps the operands of this instruction. This is only legal for commutative operations. + */ + public void swapOperands() { + assert Bytecodes.isCommutative(opcode); + Value t = x; + x = y; + y = t; + } + + /** + * Iterates over the inputs to this instruction. + * @param closure the closure to apply to each input value + */ + @Override + public void inputValuesDo(ValueClosure closure) { + x = closure.apply(x); + y = closure.apply(y); + } + + @Override + public int valueNumber() { + return Util.hash2(opcode, x, y); + } + + @Override + public boolean valueEqual(Instruction i) { + if (i instanceof Op2) { + Op2 o = (Op2) i; + return opcode == o.opcode && x == o.x && y == o.y; + } + return false; + } +}