1 /*
2 * Copyright (c) 2016, 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 package org.graalvm.compiler.hotspot.amd64.test;
25
26 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
27
28 import org.graalvm.compiler.api.replacements.Snippet;
29 import org.graalvm.compiler.asm.amd64.AMD64Address;
30 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
31 import org.graalvm.compiler.bytecode.BytecodeProvider;
32 import org.graalvm.compiler.core.common.LIRKind;
33 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
34 import org.graalvm.compiler.core.common.type.DataPointerConstant;
35 import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage;
36 import org.graalvm.compiler.hotspot.meta.HotSpotForeignCallsProviderImpl;
37 import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
38 import org.graalvm.compiler.hotspot.stubs.SnippetStub;
39 import org.graalvm.compiler.lir.LIRInstructionClass;
40 import org.graalvm.compiler.lir.Variable;
41 import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction;
42 import org.graalvm.compiler.lir.asm.ArrayDataPointerConstant;
43 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
44 import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
45 import org.graalvm.compiler.lir.jtt.LIRTest;
46 import org.graalvm.compiler.lir.jtt.LIRTestSpecification;
47 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
48 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration;
49 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;
50 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin;
51 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins;
52 import org.graalvm.compiler.options.OptionValues;
53 import org.graalvm.compiler.replacements.ReplacementsImpl;
54 import org.graalvm.compiler.replacements.classfile.ClassfileBytecodeProvider;
55 import org.junit.Assume;
56 import org.junit.Before;
57 import org.junit.Test;
58
59 import jdk.vm.ci.amd64.AMD64;
60 import jdk.vm.ci.amd64.AMD64.CPUFeature;
61 import jdk.vm.ci.amd64.AMD64Kind;
62 import jdk.vm.ci.code.Register;
63 import jdk.vm.ci.code.ValueUtil;
64 import jdk.vm.ci.meta.AllocatableValue;
65 import jdk.vm.ci.meta.MetaAccessProvider;
66 import jdk.vm.ci.meta.ResolvedJavaMethod;
67 import jdk.vm.ci.meta.Value;
68
69 public class StubAVXTest extends LIRTest {
70
71 @Before
72 public void checkAMD64() {
73 Assume.assumeTrue("skipping AMD64 specific test", getTarget().arch instanceof AMD64);
74 Assume.assumeTrue("skipping AVX test", ((AMD64) getTarget().arch).getFeatures().contains(CPUFeature.AVX));
75 }
76
77 private static final DataPointerConstant avxConstant = new ArrayDataPointerConstant(new float[]{1f, 2f, 3f, 4f, 5f, 6f, 7f, 8f}, 32);
78
79 private static class LoadAVXConstant extends AMD64LIRInstruction {
80 public static final LIRInstructionClass<LoadAVXConstant> TYPE = LIRInstructionClass.create(LoadAVXConstant.class);
81
82 @Def({REG}) AllocatableValue result;
83
84 LoadAVXConstant(AllocatableValue result) {
85 super(TYPE);
86 this.result = result;
87 }
88
89 @Override
90 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
91 masm.vmovdqu(ValueUtil.asRegister(result), (AMD64Address) crb.recordDataReferenceInCode(avxConstant));
92 }
93 }
94
95 private static final LIRTestSpecification loadAVXConstant = new LIRTestSpecification() {
96
97 @Override
98 public void generate(LIRGeneratorTool gen) {
99 Variable ret = gen.newVariable(LIRKind.value(AMD64Kind.V256_SINGLE));
100 gen.append(new LoadAVXConstant(ret));
101 setResult(ret);
102 }
103 };
104
105 @LIRIntrinsic
106 public static Object loadAVXConstant(@SuppressWarnings("unused") LIRTestSpecification spec) {
107 return null;
108 }
109
110 private static class CompareAVXRegister extends AMD64LIRInstruction {
111 public static final LIRInstructionClass<CompareAVXRegister> TYPE = LIRInstructionClass.create(CompareAVXRegister.class);
112
113 @Def({REG}) AllocatableValue result;
114 @Use({REG}) AllocatableValue left;
115 @Use({REG}) AllocatableValue right;
116 @Temp({REG}) AllocatableValue temp;
117
118 CompareAVXRegister(AllocatableValue result, AllocatableValue left, AllocatableValue right, AllocatableValue temp) {
119 super(TYPE);
120 this.result = result;
121 this.left = left;
122 this.right = right;
123 this.temp = temp;
124 }
125
126 private static int getRXB(Register reg, Register rm) {
127 int rxb = (reg.encoding & 0x08) >> 1;
128 rxb |= (rm.encoding & 0x08) >> 3;
129 return rxb;
130 }
131
132 @Override
133 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
134 Register res = ValueUtil.asRegister(result);
135 Register x = ValueUtil.asRegister(left);
136 Register y = ValueUtil.asRegister(right);
137 Register tmp = ValueUtil.asRegister(temp);
138
139 // VEX.NDS.256.0F.WIG C2 /r ib(0)
140 // VCMPPS tmp, x, y, EQ
141 masm.emitByte(0xC4); // VEX 3-byte
142 masm.emitByte((~getRXB(tmp, y) & 0x7) << 5 | 0x01); // RXB m-mmmmm (0F)
143 masm.emitByte(((~x.encoding & 0x0f) << 3) | 0b1_00); // W(0) vvvv L(1) pp(0)
144 masm.emitByte(0xC2);
145 masm.emitByte(0xC0 | ((tmp.encoding & 0x07) << 3) | (y.encoding & 0x07));
146 masm.emitByte(0);
147
148 // VEX.256.0F.WIG 50 /r
149 // VMOVMSKPS res, tmp
150 masm.emitByte(0xC4); // VEX 3-byte
151 masm.emitByte((~getRXB(res, tmp) & 0x7) << 5 | 0x01); // RXB m-mmmmm (0F)
152 masm.emitByte(0b0_1111_1_00); // W(0) vvvv L(1) pp(0)
153 masm.emitByte(0x50);
154 masm.emitByte(0xC0 | ((res.encoding & 0x07) << 3) | (tmp.encoding & 0x07));
155 }
156 }
157
158 private static final LIRTestSpecification compareAVXRegister = new LIRTestSpecification() {
159
160 @Override
161 public void generate(LIRGeneratorTool gen, Value arg0, Value arg1) {
162 Variable ret = gen.newVariable(LIRKind.value(AMD64Kind.DWORD));
163 gen.append(new CompareAVXRegister(ret, gen.asAllocatable(arg0), gen.asAllocatable(arg1), gen.newVariable(LIRKind.value(AMD64Kind.V256_QWORD))));
164 setResult(ret);
165 }
166 };
167
168 private static class TestStub extends SnippetStub {
169
170 TestStub(OptionValues options, HotSpotProviders providers, HotSpotForeignCallLinkage linkage) {
171 super("testStub", options, providers, linkage);
172 }
173
174 @Snippet
175 static void testStub() {
176 }
177
178 @Override
179 protected BytecodeProvider getReplacementsBytecodeProvider() {
180 ReplacementsImpl d = (ReplacementsImpl) providers.getReplacements();
181 MetaAccessProvider metaAccess = d.providers.getMetaAccess();
182 return new ClassfileBytecodeProvider(metaAccess, d.snippetReflection, ClassLoader.getSystemClassLoader());
183 }
184 }
185
186 public static final ForeignCallDescriptor TEST_STUB = new ForeignCallDescriptor("test_stub", void.class);
187
188 @LIRIntrinsic
189 public static int compareAVXRegister(@SuppressWarnings("unused") LIRTestSpecification spec, Object left, Object right) {
190 return left == right ? 0xff : 0;
191 }
192
193 @Override
194 protected GraphBuilderConfiguration editGraphBuilderConfiguration(GraphBuilderConfiguration conf) {
195 InvocationPlugins invocationPlugins = conf.getPlugins().getInvocationPlugins();
196 InvocationPlugins.Registration r = new InvocationPlugins.Registration(invocationPlugins, TestStub.class);
197 r.register0("testStub", new InvocationPlugin() {
198 @Override
199 public boolean apply(GraphBuilderContext b, ResolvedJavaMethod targetMethod, InvocationPlugin.Receiver receiver) {
200 b.add(new ForeignCallNode(getProviders().getForeignCalls(), TEST_STUB));
201 return true;
202 }
203 });
204 return super.editGraphBuilderConfiguration(conf);
205 }
206
207 public static int testStub() {
208 Object preStub = loadAVXConstant(loadAVXConstant);
209
210 // do something to potentially destroy the value
211 TestStub.testStub();
212
213 Object postStub = loadAVXConstant(loadAVXConstant);
214 return compareAVXRegister(compareAVXRegister, preStub, postStub);
215 }
216
217 @Test
218 public void test() {
219 HotSpotProviders providers = (HotSpotProviders) getProviders();
220 HotSpotForeignCallsProviderImpl foreignCalls = (HotSpotForeignCallsProviderImpl) providers.getForeignCalls();
221 HotSpotForeignCallLinkage linkage = foreignCalls.registerStubCall(TEST_STUB, true, HotSpotForeignCallLinkage.Transition.LEAF_NOFP);
222 linkage.setCompiledStub(new TestStub(getInitialOptions(), providers, linkage));
223 runTest("testStub");
224 }
225 }