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 }