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.hotspot.HotSpotBackend.Options.GraalArithmeticStubs;
28
29 import org.graalvm.compiler.api.replacements.Snippet;
30 import org.graalvm.compiler.core.common.spi.ForeignCallsProvider;
31 import org.graalvm.compiler.debug.DebugHandlersFactory;
32 import org.graalvm.compiler.graph.Node;
33 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
34 import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
35 import org.graalvm.compiler.hotspot.meta.DefaultHotSpotLoweringProvider;
36 import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
37 import org.graalvm.compiler.hotspot.meta.HotSpotRegistersProvider;
38 import org.graalvm.compiler.hotspot.nodes.profiling.ProfileNode;
39 import org.graalvm.compiler.hotspot.replacements.profiling.ProbabilisticProfileSnippets;
40 import org.graalvm.compiler.nodes.StructuredGraph;
41 import org.graalvm.compiler.nodes.calc.FloatConvertNode;
42 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
43 import org.graalvm.compiler.nodes.spi.LoweringTool;
44 import org.graalvm.compiler.options.OptionValues;
45 import org.graalvm.compiler.replacements.amd64.AMD64ConvertSnippets;
46 import org.graalvm.compiler.replacements.nodes.UnaryMathIntrinsicNode;
47 import org.graalvm.compiler.replacements.nodes.UnaryMathIntrinsicNode.UnaryOperation;
48 import org.graalvm.compiler.serviceprovider.JavaVersionUtil;
49
50 import jdk.vm.ci.code.TargetDescription;
51 import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
52 import jdk.vm.ci.meta.MetaAccessProvider;
53 import jdk.vm.ci.meta.ResolvedJavaMethod;
54
55 public class AMD64HotSpotLoweringProvider extends DefaultHotSpotLoweringProvider {
56
57 private AMD64ConvertSnippets.Templates convertSnippets;
58 private ProbabilisticProfileSnippets.Templates profileSnippets;
59 private AMD64X87MathSnippets.Templates mathSnippets;
60
61 public AMD64HotSpotLoweringProvider(HotSpotGraalRuntimeProvider runtime, MetaAccessProvider metaAccess, ForeignCallsProvider foreignCalls, HotSpotRegistersProvider registers,
62 HotSpotConstantReflectionProvider constantReflection, TargetDescription target) {
63 super(runtime, metaAccess, foreignCalls, registers, constantReflection, target);
64 }
65
66 @Override
67 public void initialize(OptionValues options, Iterable<DebugHandlersFactory> factories, HotSpotProviders providers, GraalHotSpotVMConfig config) {
68 convertSnippets = new AMD64ConvertSnippets.Templates(options, factories, providers, providers.getSnippetReflection(), providers.getCodeCache().getTarget());
69 profileSnippets = ProfileNode.Options.ProbabilisticProfiling.getValue(options) && !JavaVersionUtil.Java8OrEarlier
70 ? new ProbabilisticProfileSnippets.Templates(options, factories, providers, providers.getCodeCache().getTarget())
71 : null;
72 mathSnippets = new AMD64X87MathSnippets.Templates(options, factories, providers, providers.getSnippetReflection(), providers.getCodeCache().getTarget());
73 super.initialize(options, factories, providers, config);
74 }
75
76 @Override
77 public void lower(Node n, LoweringTool tool) {
78 if (n instanceof FloatConvertNode) {
79 convertSnippets.lower((FloatConvertNode) n, tool);
80 } else if (profileSnippets != null && n instanceof ProfileNode) {
81 profileSnippets.lower((ProfileNode) n, tool);
82 } else if (n instanceof UnaryMathIntrinsicNode) {
83 lowerUnaryMath((UnaryMathIntrinsicNode) n, tool);
84 } else {
85 super.lower(n, tool);
86 }
87 }
88
89 private void lowerUnaryMath(UnaryMathIntrinsicNode math, LoweringTool tool) {
90 if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) {
91 return;
92 }
93 StructuredGraph graph = math.graph();
94 ResolvedJavaMethod method = graph.method();
95 if (method != null) {
96 if (method.getAnnotation(Snippet.class) != null) {
97 // In the context of SnippetStub, i.e., Graal-generated stubs, use the LIR
98 // lowering to emit the stub assembly code instead of the Node lowering.
99 return;
100 }
101 }
102 if (!GraalArithmeticStubs.getValue(graph.getOptions())) {
103 switch (math.getOperation()) {
104 case SIN:
105 case COS:
106 case TAN:
107 // Math.sin(), .cos() and .tan() guarantee a value within 1 ULP of the exact
108 // result, but x87 trigonometric FPU instructions are only that accurate within
109 // [-pi/4, pi/4]. The snippets fall back to a foreign call to HotSpot stubs
110 // should the inputs outside of that interval.
111 mathSnippets.lower(math, tool);
112 return;
113 case LOG:
114 math.replaceAtUsages(graph.addOrUnique(new AMD64X87MathIntrinsicNode(math.getValue(), UnaryOperation.LOG)));
115 return;
116 case LOG10:
117 math.replaceAtUsages(graph.addOrUnique(new AMD64X87MathIntrinsicNode(math.getValue(), UnaryOperation.LOG10)));
118 return;
119 }
120 }
121
122 ForeignCallNode call = graph.add(new ForeignCallNode(foreignCalls, math.getOperation().foreignCallDescriptor, math.getValue()));
123 graph.addAfterFixed(tool.lastFixedNode(), call);
124 math.replaceAtUsages(call);
125 }
126
127 @Override
128 public Integer smallestCompareWidth() {
129 return 8;
130 }
131 }