1 /*
   2  * Copyright (c) 2013, 2018, 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 
  24 
  25 package org.graalvm.compiler.hotspot.amd64;
  26 
  27 import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC;
  28 import static org.graalvm.compiler.hotspot.HotSpotBackend.Options.GraalArithmeticStubs;
  29 
  30 import org.graalvm.compiler.api.replacements.Snippet;
  31 import org.graalvm.compiler.core.common.spi.ForeignCallsProvider;
  32 import org.graalvm.compiler.debug.DebugHandlersFactory;
  33 import org.graalvm.compiler.graph.Node;
  34 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
  35 import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
  36 import org.graalvm.compiler.hotspot.meta.DefaultHotSpotLoweringProvider;
  37 import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
  38 import org.graalvm.compiler.hotspot.meta.HotSpotRegistersProvider;
  39 import org.graalvm.compiler.hotspot.nodes.profiling.ProfileNode;
  40 import org.graalvm.compiler.hotspot.replacements.profiling.ProbabilisticProfileSnippets;
  41 import org.graalvm.compiler.nodes.StructuredGraph;
  42 import org.graalvm.compiler.nodes.calc.FloatConvertNode;
  43 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
  44 import org.graalvm.compiler.nodes.spi.LoweringTool;
  45 import org.graalvm.compiler.options.OptionValues;
  46 import org.graalvm.compiler.replacements.amd64.AMD64ConvertSnippets;
  47 import org.graalvm.compiler.replacements.nodes.UnaryMathIntrinsicNode;
  48 import org.graalvm.compiler.replacements.nodes.UnaryMathIntrinsicNode.UnaryOperation;
  49 import org.graalvm.compiler.serviceprovider.JavaVersionUtil;
  50 
  51 import jdk.vm.ci.code.TargetDescription;
  52 import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
  53 import jdk.vm.ci.meta.MetaAccessProvider;
  54 import jdk.vm.ci.meta.ResolvedJavaMethod;
  55 
  56 public class AMD64HotSpotLoweringProvider extends DefaultHotSpotLoweringProvider {
  57 
  58     private AMD64ConvertSnippets.Templates convertSnippets;
  59     private ProbabilisticProfileSnippets.Templates profileSnippets;
  60     private AMD64X87MathSnippets.Templates mathSnippets;
  61 
  62     public AMD64HotSpotLoweringProvider(HotSpotGraalRuntimeProvider runtime, MetaAccessProvider metaAccess, ForeignCallsProvider foreignCalls, HotSpotRegistersProvider registers,
  63                     HotSpotConstantReflectionProvider constantReflection, TargetDescription target) {
  64         super(runtime, metaAccess, foreignCalls, registers, constantReflection, target);
  65     }
  66 
  67     @Override
  68     public void initialize(OptionValues options, Iterable<DebugHandlersFactory> factories, HotSpotProviders providers, GraalHotSpotVMConfig config) {
  69         convertSnippets = new AMD64ConvertSnippets.Templates(options, factories, providers, providers.getSnippetReflection(), providers.getCodeCache().getTarget());
  70         profileSnippets = ProfileNode.Options.ProbabilisticProfiling.getValue(options) && !JavaVersionUtil.Java8OrEarlier && GeneratePIC.getValue(options)
  71                         ? new ProbabilisticProfileSnippets.Templates(options, factories, providers, providers.getCodeCache().getTarget())
  72                         : null;
  73         mathSnippets = new AMD64X87MathSnippets.Templates(options, factories, providers, providers.getSnippetReflection(), providers.getCodeCache().getTarget());
  74         super.initialize(options, factories, providers, config);
  75     }
  76 
  77     @Override
  78     public void lower(Node n, LoweringTool tool) {
  79         if (n instanceof FloatConvertNode) {
  80             convertSnippets.lower((FloatConvertNode) n, tool);
  81         } else if (profileSnippets != null && n instanceof ProfileNode) {
  82             profileSnippets.lower((ProfileNode) n, tool);
  83         } else if (n instanceof UnaryMathIntrinsicNode) {
  84             lowerUnaryMath((UnaryMathIntrinsicNode) n, tool);
  85         } else {
  86             super.lower(n, tool);
  87         }
  88     }
  89 
  90     private void lowerUnaryMath(UnaryMathIntrinsicNode math, LoweringTool tool) {
  91         if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) {
  92             return;
  93         }
  94         StructuredGraph graph = math.graph();
  95         ResolvedJavaMethod method = graph.method();
  96         if (method != null) {
  97             if (method.getAnnotation(Snippet.class) != null) {
  98                 // In the context of SnippetStub, i.e., Graal-generated stubs, use the LIR
  99                 // lowering to emit the stub assembly code instead of the Node lowering.
 100                 return;
 101             }
 102         }
 103         if (!GraalArithmeticStubs.getValue(graph.getOptions())) {
 104             switch (math.getOperation()) {
 105                 case SIN:
 106                 case COS:
 107                 case TAN:
 108                     // Math.sin(), .cos() and .tan() guarantee a value within 1 ULP of the exact
 109                     // result, but x87 trigonometric FPU instructions are only that accurate within
 110                     // [-pi/4, pi/4]. The snippets fall back to a foreign call to HotSpot stubs
 111                     // should the inputs outside of that interval.
 112                     mathSnippets.lower(math, tool);
 113                     return;
 114                 case LOG:
 115                     math.replaceAtUsages(graph.addOrUnique(new AMD64X87MathIntrinsicNode(math.getValue(), UnaryOperation.LOG)));
 116                     return;
 117                 case LOG10:
 118                     math.replaceAtUsages(graph.addOrUnique(new AMD64X87MathIntrinsicNode(math.getValue(), UnaryOperation.LOG10)));
 119                     return;
 120             }
 121         }
 122 
 123         ForeignCallNode call = graph.add(new ForeignCallNode(foreignCalls, math.getOperation().foreignCallDescriptor, math.getValue()));
 124         graph.addAfterFixed(tool.lastFixedNode(), call);
 125         math.replaceAtUsages(call);
 126     }
 127 
 128     @Override
 129     public Integer smallestCompareWidth() {
 130         return 8;





 131     }
 132 }
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