1 /*
2 * Copyright (c) 2011, 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.sparc;
26
27 import static jdk.vm.ci.code.ValueUtil.asRegister;
28 import static jdk.vm.ci.sparc.SPARC.g0;
29
30 import org.graalvm.compiler.asm.sparc.SPARCAddress;
31 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
32 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler.ScratchRegister;
33 import org.graalvm.compiler.core.common.LIRKind;
34 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
35 import org.graalvm.compiler.hotspot.HotSpotDebugInfoBuilder;
36 import org.graalvm.compiler.lir.LIRFrameState;
37 import org.graalvm.compiler.lir.LIRInstructionClass;
38 import org.graalvm.compiler.lir.Opcode;
39 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
40 import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
41 import org.graalvm.compiler.lir.sparc.SPARCLIRInstruction;
42
43 import jdk.vm.ci.code.Register;
44 import jdk.vm.ci.code.ValueUtil;
45 import jdk.vm.ci.code.site.InfopointReason;
46 import jdk.vm.ci.meta.AllocatableValue;
47 import jdk.vm.ci.meta.Value;
48
49 /**
50 * Emits a safepoint poll.
51 */
52 @Opcode("SAFEPOINT")
53 public class SPARCHotSpotSafepointOp extends SPARCLIRInstruction {
54 public static final LIRInstructionClass<SPARCHotSpotSafepointOp> TYPE = LIRInstructionClass.create(SPARCHotSpotSafepointOp.class);
55 public static final SizeEstimate SIZE = SizeEstimate.create(9);
56
57 @State protected LIRFrameState state;
58 @Use({OperandFlag.REG, OperandFlag.ILLEGAL}) AllocatableValue safepointPollAddress;
59 private final GraalHotSpotVMConfig config;
60 private final Register thread;
61
62 public SPARCHotSpotSafepointOp(LIRFrameState state, GraalHotSpotVMConfig config, Register thread, LIRGeneratorTool tool) {
63 super(TYPE, SIZE);
64 this.state = state;
65 this.config = config;
66 this.thread = thread;
67 SPARCHotSpotLIRGenerator lirGen = (SPARCHotSpotLIRGenerator) tool;
68 safepointPollAddress = lirGen.getSafepointAddressValue();
69 }
70
71 @Override
72 public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
73 emitCode(crb, masm, config, false, state, thread, safepointPollAddress);
74 }
75
76 public static void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm, GraalHotSpotVMConfig config, boolean atReturn, LIRFrameState state, Register thread,
77 Value safepointPollAddress) {
78 if (config.threadLocalHandshakes) {
79 emitThreadLocalPoll(crb, masm, config, atReturn, state, thread);
80 } else {
81 emitGlobalPoll(crb, masm, config, atReturn, state, asRegister(safepointPollAddress));
82 }
83 }
84
85 /**
86 * Emit a global safepoint poll.
87 */
88 private static void emitGlobalPoll(CompilationResultBuilder crb, SPARCMacroAssembler masm, GraalHotSpotVMConfig config, boolean atReturn, LIRFrameState state, Register safepointPollAddress) {
89 crb.recordMark(atReturn ? config.MARKID_POLL_RETURN_FAR : config.MARKID_POLL_FAR);
90 if (state != null) {
91 final int pos = masm.position();
92 crb.recordInfopoint(pos, state, InfopointReason.SAFEPOINT);
93 }
94 masm.ldx(new SPARCAddress(safepointPollAddress, 0), g0);
95 }
96
97 /**
98 * Emit a thread-local safepoint poll.
99 */
100 private static void emitThreadLocalPoll(CompilationResultBuilder crb, SPARCMacroAssembler masm, GraalHotSpotVMConfig config, boolean atReturn, LIRFrameState state, Register thread) {
101 assert !atReturn || state == null : "state is unneeded at return";
102
103 assert config.threadPollingPageOffset >= 0;
104
105 try (ScratchRegister scratchReg = masm.getScratchRegister()) {
106 Register scratch = scratchReg.getRegister();
107
108 masm.ldx(new SPARCAddress(thread, config.threadPollingPageOffset), scratch);
109
110 crb.recordMark(atReturn ? config.MARKID_POLL_RETURN_FAR : config.MARKID_POLL_FAR);
111 if (state != null) {
112 final int pos = masm.position();
113 crb.recordInfopoint(pos, state, InfopointReason.SAFEPOINT);
114 }
115 masm.ldx(new SPARCAddress(scratch, 0), g0);
116 }
117 }
118
119 static AllocatableValue getSafepointAddressValue(SPARCHotSpotLIRGenerator gen) {
120 if (gen.config.threadLocalHandshakes) {
121 return Value.ILLEGAL;
122 } else {
123 return gen.newVariable(LIRKind.value(gen.target().arch.getWordKind()));
124 }
125 }
126
127 static void emitPrologue(SPARCHotSpotNodeLIRBuilder lir, SPARCHotSpotLIRGenerator gen) {
128 if (!gen.config.threadLocalHandshakes) {
129 AllocatableValue var = gen.getSafepointAddressValue();
130 lir.append(new SPARCHotSpotSafepointOp.SPARCLoadSafepointPollAddress(var, gen.config));
131 gen.append(((HotSpotDebugInfoBuilder) lir.getDebugInfoBuilder()).lockStack());
132 }
133 }
134
135 public static class SPARCLoadSafepointPollAddress extends SPARCLIRInstruction {
136 public static final LIRInstructionClass<SPARCLoadSafepointPollAddress> TYPE = LIRInstructionClass.create(SPARCLoadSafepointPollAddress.class);
137 public static final SizeEstimate SIZE = SizeEstimate.create(2);
138
139 @Def({OperandFlag.REG}) protected AllocatableValue result;
140 private final GraalHotSpotVMConfig config;
141
142 public SPARCLoadSafepointPollAddress(AllocatableValue result, GraalHotSpotVMConfig config) {
143 super(TYPE, SIZE);
144 this.result = result;
145 this.config = config;
146 }
147
148 @Override
149 public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
150 masm.setx(config.safepointPollingAddress, ValueUtil.asRegister(result), false);
151 }
152 }
153 }