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 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 }