1 /*
2 * Copyright (c) 2016, 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
26 package org.graalvm.compiler.hotspot.amd64.test;
27
28 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
29
30 import org.graalvm.compiler.api.replacements.Snippet;
31 import org.graalvm.compiler.asm.amd64.AMD64Address;
32 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
33 import org.graalvm.compiler.bytecode.BytecodeProvider;
34 import org.graalvm.compiler.core.common.LIRKind;
35 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
36 import org.graalvm.compiler.core.common.type.DataPointerConstant;
37 import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage;
38 import org.graalvm.compiler.hotspot.meta.HotSpotForeignCallsProviderImpl;
39 import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
40 import org.graalvm.compiler.hotspot.stubs.SnippetStub;
41 import org.graalvm.compiler.lir.LIRInstructionClass;
42 import org.graalvm.compiler.lir.Variable;
43 import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction;
44 import org.graalvm.compiler.lir.asm.ArrayDataPointerConstant;
45 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
46 import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
47 import org.graalvm.compiler.lir.jtt.LIRTest;
48 import org.graalvm.compiler.lir.jtt.LIRTestSpecification;
49 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
50 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration;
51 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;
52 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin;
53 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugins;
54 import org.graalvm.compiler.options.OptionValues;
55 import org.graalvm.compiler.replacements.ReplacementsImpl;
56 import org.graalvm.compiler.replacements.classfile.ClassfileBytecodeProvider;
57 import org.junit.Assume;
58 import org.junit.Before;
59 import org.junit.Test;
60
61 import jdk.vm.ci.amd64.AMD64;
62 import jdk.vm.ci.amd64.AMD64.CPUFeature;
63 import jdk.vm.ci.amd64.AMD64Kind;
64 import jdk.vm.ci.code.Register;
65 import jdk.vm.ci.code.ValueUtil;
66 import jdk.vm.ci.meta.AllocatableValue;
67 import jdk.vm.ci.meta.MetaAccessProvider;
68 import jdk.vm.ci.meta.ResolvedJavaMethod;
69 import jdk.vm.ci.meta.Value;
70 import org.graalvm.compiler.hotspot.HotSpotBackend;
71
72 public class StubAVXTest extends LIRTest {
73
74 @Before
75 public void checkAMD64() {
76 Assume.assumeTrue("skipping AMD64 specific test", getTarget().arch instanceof AMD64);
77 Assume.assumeTrue("skipping AVX test", ((AMD64) getTarget().arch).getFeatures().contains(CPUFeature.AVX));
78 if (getBackend() instanceof HotSpotBackend) {
79 HotSpotBackend backend = (HotSpotBackend) getBackend();
80 Assume.assumeTrue("skipping because of MaxVectorSize", backend.getRuntime().getVMConfig().maxVectorSize >= 32);
81 }
82 }
83
84 private static final DataPointerConstant avxConstant = new ArrayDataPointerConstant(new float[]{1f, 2f, 3f, 4f, 5f, 6f, 7f, 8f}, 32);
85
86 private static class LoadAVXConstant extends AMD64LIRInstruction {
87 public static final LIRInstructionClass<LoadAVXConstant> TYPE = LIRInstructionClass.create(LoadAVXConstant.class);
88
89 @Def({REG}) AllocatableValue result;
90
91 LoadAVXConstant(AllocatableValue result) {
92 super(TYPE);
93 this.result = result;
94 }
95
96 @Override
97 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
98 masm.vmovdqu(ValueUtil.asRegister(result), (AMD64Address) crb.recordDataReferenceInCode(avxConstant));
99 }
100 }
101
102 private static final LIRTestSpecification loadAVXConstant = new LIRTestSpecification() {
103
104 @Override
105 public void generate(LIRGeneratorTool gen) {
106 Variable ret = gen.newVariable(LIRKind.value(AMD64Kind.V256_SINGLE));
107 gen.append(new LoadAVXConstant(ret));
108 setResult(ret);
109 }
110 };
111
112 @LIRIntrinsic
113 public static Object loadAVXConstant(@SuppressWarnings("unused") LIRTestSpecification spec) {
114 return null;
115 }
116
117 private static class CompareAVXRegister extends AMD64LIRInstruction {
118 public static final LIRInstructionClass<CompareAVXRegister> TYPE = LIRInstructionClass.create(CompareAVXRegister.class);
119
120 @Def({REG}) AllocatableValue result;
121 @Use({REG}) AllocatableValue left;
122 @Use({REG}) AllocatableValue right;
123 @Temp({REG}) AllocatableValue temp;
124
125 CompareAVXRegister(AllocatableValue result, AllocatableValue left, AllocatableValue right, AllocatableValue temp) {
126 super(TYPE);
127 this.result = result;
128 this.left = left;
129 this.right = right;
130 this.temp = temp;
131 }
132
133 private static int getRXB(Register reg, Register rm) {
134 int rxb = (reg.encoding & 0x08) >> 1;
135 rxb |= (rm.encoding & 0x08) >> 3;
136 return rxb;
137 }
138
139 @Override
140 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
141 Register res = ValueUtil.asRegister(result);
142 Register x = ValueUtil.asRegister(left);
143 Register y = ValueUtil.asRegister(right);
144 Register tmp = ValueUtil.asRegister(temp);
145
146 // VEX.NDS.256.0F.WIG C2 /r ib(0)
147 // VCMPPS tmp, x, y, EQ
148 masm.emitByte(0xC4); // VEX 3-byte
149 masm.emitByte((~getRXB(tmp, y) & 0x7) << 5 | 0x01); // RXB m-mmmmm (0F)
150 masm.emitByte(((~x.encoding & 0x0f) << 3) | 0b1_00); // W(0) vvvv L(1) pp(0)
151 masm.emitByte(0xC2);
152 masm.emitByte(0xC0 | ((tmp.encoding & 0x07) << 3) | (y.encoding & 0x07));
153 masm.emitByte(0);
154
155 // VEX.256.0F.WIG 50 /r
156 // VMOVMSKPS res, tmp
157 masm.emitByte(0xC4); // VEX 3-byte
158 masm.emitByte((~getRXB(res, tmp) & 0x7) << 5 | 0x01); // RXB m-mmmmm (0F)
159 masm.emitByte(0b0_1111_1_00); // W(0) vvvv L(1) pp(0)
160 masm.emitByte(0x50);
161 masm.emitByte(0xC0 | ((res.encoding & 0x07) << 3) | (tmp.encoding & 0x07));
162 }
163 }
164
165 private static final LIRTestSpecification compareAVXRegister = new LIRTestSpecification() {
166
167 @Override
168 public void generate(LIRGeneratorTool gen, Value arg0, Value arg1) {
169 Variable ret = gen.newVariable(LIRKind.value(AMD64Kind.DWORD));
170 gen.append(new CompareAVXRegister(ret, gen.asAllocatable(arg0), gen.asAllocatable(arg1), gen.newVariable(LIRKind.value(AMD64Kind.V256_QWORD))));
171 setResult(ret);
172 }
173 };
174
175 private static class TestStub extends SnippetStub {
176
177 TestStub(OptionValues options, HotSpotProviders providers, HotSpotForeignCallLinkage linkage) {
178 super("testStub", options, providers, linkage);
179 }
180
181 @Snippet
182 static void testStub() {
183 }
184
185 @Override
186 protected BytecodeProvider getReplacementsBytecodeProvider() {
187 ReplacementsImpl d = (ReplacementsImpl) providers.getReplacements();
188 MetaAccessProvider metaAccess = d.providers.getMetaAccess();
189 return new ClassfileBytecodeProvider(metaAccess, d.snippetReflection, ClassLoader.getSystemClassLoader());
190 }
191 }
192
193 public static final ForeignCallDescriptor TEST_STUB = new ForeignCallDescriptor("test_stub", void.class);
194
195 @LIRIntrinsic
196 public static int compareAVXRegister(@SuppressWarnings("unused") LIRTestSpecification spec, Object left, Object right) {
197 return left == right ? 0xff : 0;
198 }
199
200 @Override
201 protected GraphBuilderConfiguration editGraphBuilderConfiguration(GraphBuilderConfiguration conf) {
202 InvocationPlugins invocationPlugins = conf.getPlugins().getInvocationPlugins();
203 InvocationPlugins.Registration r = new InvocationPlugins.Registration(invocationPlugins, TestStub.class);
204 r.register0("testStub", new InvocationPlugin() {
205 @Override
206 public boolean apply(GraphBuilderContext b, ResolvedJavaMethod targetMethod, InvocationPlugin.Receiver receiver) {
207 b.add(new ForeignCallNode(getProviders().getForeignCalls(), TEST_STUB));
208 return true;
209 }
210 });
211 return super.editGraphBuilderConfiguration(conf);
212 }
213
214 public static int testStub() {
215 Object preStub = loadAVXConstant(loadAVXConstant);
216
217 // do something to potentially destroy the value
218 TestStub.testStub();
219
220 Object postStub = loadAVXConstant(loadAVXConstant);
221 return compareAVXRegister(compareAVXRegister, preStub, postStub);
222 }
223
224 @Test
225 public void test() {
226 HotSpotProviders providers = (HotSpotProviders) getProviders();
227 HotSpotForeignCallsProviderImpl foreignCalls = (HotSpotForeignCallsProviderImpl) providers.getForeignCalls();
228 HotSpotForeignCallLinkage linkage = foreignCalls.registerStubCall(TEST_STUB, HotSpotForeignCallLinkage.Transition.LEAF_NOFP, HotSpotForeignCallLinkage.Reexecutability.REEXECUTABLE);
229 linkage.setCompiledStub(new TestStub(getInitialOptions(), providers, linkage));
230 runTest("testStub");
231 }
232 }