Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/nodes/IntegerMulExactNode.java @ 10484:0097fb11c16f
Add basic version of Graal's Truffle runtime.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 23 Jun 2013 21:44:15 +0200 |
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/* * Copyright (c) 2013, 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.oracle.graal.truffle.nodes; import com.oracle.graal.api.meta.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; import com.oracle.truffle.api.*; /** * Node representing an exact integer multiplication that will throw an {@link ArithmeticException} * in case the addition would overflow the 32 bit range. */ public class IntegerMulExactNode extends IntegerMulNode implements Canonicalizable, IntegerExactArithmeticNode { public IntegerMulExactNode(ValueNode x, ValueNode y) { super(x.kind(), x, y); assert x.kind() == y.kind() && (x.kind() == Kind.Int || x.kind() == Kind.Long); } @Override public ValueNode canonical(CanonicalizerTool tool) { if (x().isConstant() && !y().isConstant()) { return graph().unique(new IntegerMulExactNode(y(), x())); } if (x().isConstant()) { try { if (kind() == Kind.Int) { return ConstantNode.forInt(ExactMath.multiplyExact(x().asConstant().asInt(), y().asConstant().asInt()), graph()); } else { assert kind() == Kind.Long; return ConstantNode.forLong(ExactMath.multiplyExact(x().asConstant().asLong(), y().asConstant().asLong()), graph()); } } catch (ArithmeticException ex) { // The operation will result in an overflow exception, so do not canonicalize. } } else if (y().isConstant()) { long c = y().asConstant().asLong(); if (c == 1) { return x(); } if (c == 0) { return ConstantNode.defaultForKind(kind(), graph()); } } return this; } @Override public IntegerExactArithmeticSplitNode createSplit(AbstractBeginNode next, AbstractBeginNode deopt) { return graph().add(new IntegerMulExactSplitNode(stamp(), x(), y(), next, deopt)); } @Override public void lower(LoweringTool tool, LoweringType loweringType) { IntegerExactArithmeticSplitNode.lower(tool, this); } @NodeIntrinsic public static native int multiplyExact(int a, int b); @NodeIntrinsic public static native long multiplyExact(long a, long b); }