| /* |
| * Copyright (c) 2011, 2015, 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 org.graalvm.compiler.replacements.amd64; |
| |
| import org.graalvm.compiler.api.replacements.ClassSubstitution; |
| import org.graalvm.compiler.api.replacements.MethodSubstitution; |
| import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor; |
| import org.graalvm.compiler.graph.Node.ConstantNodeParameter; |
| import org.graalvm.compiler.graph.Node.NodeIntrinsic; |
| import org.graalvm.compiler.nodes.extended.ForeignCallNode; |
| import org.graalvm.compiler.replacements.nodes.UnaryMathIntrinsicNode; |
| import org.graalvm.compiler.replacements.nodes.UnaryMathIntrinsicNode.UnaryOperation; |
| |
| // JaCoCo Exclude |
| |
| /** |
| * Substitutions for some {@link java.lang.Math} methods that leverage AMD64 instructions for |
| * selected input values. |
| */ |
| @ClassSubstitution(Math.class) |
| public class AMD64MathSubstitutions { |
| |
| private static final double PI_4 = Math.PI / 4; |
| |
| // 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 (Math.abs(x) < PI_4) { |
| return UnaryMathIntrinsicNode.compute(x, UnaryOperation.SIN); |
| } else { |
| return callDouble1(UnaryOperation.SIN.foreignCallDescriptor, x); |
| } |
| } |
| |
| @MethodSubstitution |
| public static double cos(double x) { |
| if (Math.abs(x) < PI_4) { |
| return UnaryMathIntrinsicNode.compute(x, UnaryOperation.COS); |
| } else { |
| return callDouble1(UnaryOperation.COS.foreignCallDescriptor, x); |
| } |
| } |
| |
| @MethodSubstitution |
| public static double tan(double x) { |
| if (Math.abs(x) < PI_4) { |
| return UnaryMathIntrinsicNode.compute(x, UnaryOperation.TAN); |
| } else { |
| return callDouble1(UnaryOperation.TAN.foreignCallDescriptor, x); |
| } |
| } |
| |
| @NodeIntrinsic(value = ForeignCallNode.class) |
| private static native double callDouble1(@ConstantNodeParameter ForeignCallDescriptor descriptor, double value); |
| |
| @NodeIntrinsic(value = ForeignCallNode.class) |
| private static native double callDouble2(@ConstantNodeParameter ForeignCallDescriptor descriptor, double a, double b); |
| } |