1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.replacements.aarch64;
  24 
  25 import org.graalvm.compiler.bytecode.BytecodeProvider;
  26 import org.graalvm.compiler.core.common.spi.ForeignCallsProvider;
  27 import org.graalvm.compiler.nodes.ValueNode;
  28 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration.Plugins;
  29 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;
  30 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin;
  31 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins;
  32 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins.Registration;
  33 import org.graalvm.compiler.replacements.nodes.BitScanForwardNode;
  34 
  35 import jdk.vm.ci.meta.JavaKind;
  36 import jdk.vm.ci.meta.ResolvedJavaMethod;
  37 
  38 public class AArch64GraphBuilderPlugins {
  39 
  40     public static void register(Plugins plugins, ForeignCallsProvider foreignCalls, BytecodeProvider bytecodeProvider) {
  41         InvocationPlugins invocationPlugins = plugins.getInvocationPlugins();
  42         invocationPlugins.defer(new Runnable() {
  43             @Override
  44             public void run() {
  45                 registerIntegerLongPlugins(invocationPlugins, AArch64IntegerSubstitutions.class, JavaKind.Int, bytecodeProvider);
  46                 registerIntegerLongPlugins(invocationPlugins, AArch64LongSubstitutions.class, JavaKind.Long, bytecodeProvider);
  47                 registerMathPlugins(invocationPlugins, foreignCalls);
  48             }
  49         });
  50     }
  51 
  52     private static void registerIntegerLongPlugins(InvocationPlugins plugins, Class<?> substituteDeclaringClass, JavaKind kind, BytecodeProvider bytecodeProvider) {
  53         Class<?> declaringClass = kind.toBoxedJavaClass();
  54         Class<?> type = kind.toJavaClass();
  55         Registration r = new Registration(plugins, declaringClass, bytecodeProvider);
  56         r.register1("numberOfLeadingZeros", type, new InvocationPlugin() {
  57             @Override
  58             public boolean apply(GraphBuilderContext b, ResolvedJavaMethod targetMethod, Receiver receiver, ValueNode value) {
  59                 ValueNode folded = AArch64CountLeadingZerosNode.tryFold(value);
  60                 if (folded != null) {
  61                     b.addPush(JavaKind.Int, folded);
  62                 } else {
  63                     b.addPush(JavaKind.Int, new AArch64CountLeadingZerosNode(value));
  64                 }
  65                 return true;
  66             }
  67         });
  68         r.register1("numberOfTrailingZeros", type, new InvocationPlugin() {
  69             @Override
  70             public boolean apply(GraphBuilderContext b, ResolvedJavaMethod targetMethod, Receiver receiver, ValueNode value) {
  71                 ValueNode folded = BitScanForwardNode.tryFold(value);
  72                 if (folded != null) {
  73                     b.addPush(JavaKind.Int, folded);
  74                 } else {
  75                     b.addPush(JavaKind.Int, new BitScanForwardNode(value));
  76                 }
  77                 return true;
  78             }
  79         });
  80         r.registerMethodSubstitution(substituteDeclaringClass, "bitCount", type);
  81     }
  82 
  83     @SuppressWarnings("unused")
  84     private static void registerMathPlugins(InvocationPlugins plugins, ForeignCallsProvider foreignCalls) {
  85         // Registration r = new Registration(plugins, Math.class);
  86         // r.register1("sin", Double.TYPE, new ForeignCallPlugin(foreignCalls, ARITHMETIC_SIN));
  87         // r.register1("cos", Double.TYPE, new ForeignCallPlugin(foreignCalls, ARITHMETIC_COS));
  88         // r.register1("tan", Double.TYPE, new ForeignCallPlugin(foreignCalls, ARITHMETIC_TAN));
  89         // r.register1("exp", Double.TYPE, new ForeignCallPlugin(foreignCalls, ARITHMETIC_EXP));
  90         // r.register1("log", Double.TYPE, new ForeignCallPlugin(foreignCalls, ARITHMETIC_LOG));
  91         // r.register1("log10", Double.TYPE, new ForeignCallPlugin(foreignCalls, ARITHMETIC_LOG10));
  92         // r.register2("pow", Double.TYPE, Double.TYPE, new ForeignCallPlugin(foreignCalls,
  93         // ARITHMETIC_POW));
  94     }
  95 }