Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/MathSubstitutionsX86.java @ 8481:92571f3eeeeb
made VM independent method substitutions be interpretable
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 26 Mar 2013 14:00:16 +0100 |
parents | 2ffd472c5d25 |
children | 2e4f035186cf |
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/* * Copyright (c) 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.oracle.graal.replacements; import com.oracle.graal.api.code.RuntimeCallTarget.Descriptor; import com.oracle.graal.api.replacements.*; import com.oracle.graal.graph.Node.ConstantNodeParameter; import com.oracle.graal.graph.Node.NodeIntrinsic; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.replacements.nodes.*; import com.oracle.graal.replacements.nodes.MathIntrinsicNode.Operation; /** * Substitutions for {@link java.lang.Math} methods. */ @ClassSubstitution(java.lang.Math.class) public class MathSubstitutionsX86 { private static final double PI_4 = 0.7853981633974483; @MethodSubstitution public static double abs(double x) { return MathIntrinsicNode.compute(x, Operation.ABS); } @MethodSubstitution public static double sqrt(double x) { return MathIntrinsicNode.compute(x, Operation.SQRT); } @MethodSubstitution public static double log(double x) { return MathIntrinsicNode.compute(x, Operation.LOG); } @MethodSubstitution public static double log10(double x) { return MathIntrinsicNode.compute(x, Operation.LOG10); } // NOTE on snippets below: // Math.sin(), .cos() and .tan() guarantee a value within 1 ULP of the // exact result, but x87 trigonometric FPU instructions are only that // accurate within [-pi/4, pi/4]. Examine the passed value and provide // a slow path for inputs outside of that interval. @MethodSubstitution public static double sin(double x) { if (abs(x) < PI_4) { return MathIntrinsicNode.compute(x, Operation.SIN); } else { return callDouble(ARITHMETIC_SIN, x); } } @MethodSubstitution public static double cos(double x) { if (abs(x) < PI_4) { return MathIntrinsicNode.compute(x, Operation.COS); } else { return callDouble(ARITHMETIC_COS, x); } } @MethodSubstitution public static double tan(double x) { if (abs(x) < PI_4) { return MathIntrinsicNode.compute(x, Operation.TAN); } else { return callDouble(ARITHMETIC_TAN, x); } } public static final Descriptor ARITHMETIC_SIN = new Descriptor("arithmeticSin", false, double.class, double.class); public static final Descriptor ARITHMETIC_COS = new Descriptor("arithmeticCos", false, double.class, double.class); public static final Descriptor ARITHMETIC_TAN = new Descriptor("arithmeticTan", false, double.class, double.class); @NodeIntrinsic(value = RuntimeCallNode.class, setStampFromReturnType = true) public static double callDouble(@ConstantNodeParameter Descriptor descriptor, double value) { if (descriptor == ARITHMETIC_SIN) { return Math.sin(value); } if (descriptor == ARITHMETIC_COS) { return Math.cos(value); } assert descriptor == ARITHMETIC_TAN; return Math.tan(value); } }