1 /*
2 * Copyright (c) 2014, 2015, 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 package org.graalvm.compiler.hotspot.sparc;
24
25 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
26 import static jdk.vm.ci.code.ValueUtil.asRegister;
27 import static jdk.vm.ci.sparc.SPARC.STACK_BIAS;
28 import static jdk.vm.ci.sparc.SPARC.g0;
29 import static jdk.vm.ci.sparc.SPARC.i0;
30 import static jdk.vm.ci.sparc.SPARC.i1;
31 import static jdk.vm.ci.sparc.SPARC.i2;
32 import static jdk.vm.ci.sparc.SPARC.i3;
33 import static jdk.vm.ci.sparc.SPARC.i4;
34 import static jdk.vm.ci.sparc.SPARC.l7;
35 import static jdk.vm.ci.sparc.SPARC.o0;
36 import static jdk.vm.ci.sparc.SPARC.o1;
37 import static jdk.vm.ci.sparc.SPARC.o2;
38 import static jdk.vm.ci.sparc.SPARC.o3;
39 import static jdk.vm.ci.sparc.SPARC.o4;
40 import static jdk.vm.ci.sparc.SPARC.o5;
41 import static jdk.vm.ci.sparc.SPARC.o7;
42 import static jdk.vm.ci.sparc.SPARC.sp;
43
44 import org.graalvm.compiler.asm.sparc.SPARCAddress;
45 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
46 import org.graalvm.compiler.core.common.LIRKind;
47 import org.graalvm.compiler.hotspot.HotSpotBackend;
48 import org.graalvm.compiler.lir.LIRInstructionClass;
49 import org.graalvm.compiler.lir.Opcode;
50 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
51 import org.graalvm.compiler.lir.sparc.SPARCLIRInstruction;
52
53 import jdk.vm.ci.code.Register;
54 import jdk.vm.ci.meta.AllocatableValue;
55 import jdk.vm.ci.meta.PlatformKind;
56
57 /**
58 * Emits code that enters a stack frame which is tailored to call the C++ method
59 * {@link HotSpotBackend#UNPACK_FRAMES Deoptimization::unpack_frames}.
60 */
61 @Opcode("ENTER_UNPACK_FRAMES_STACK_FRAME")
62 final class SPARCHotSpotEnterUnpackFramesStackFrameOp extends SPARCLIRInstruction {
63 public static final LIRInstructionClass<SPARCHotSpotEnterUnpackFramesStackFrameOp> TYPE = LIRInstructionClass.create(SPARCHotSpotEnterUnpackFramesStackFrameOp.class);
64
65 private final Register thread;
66 private final int threadLastJavaSpOffset;
67 private final int threadLastJavaPcOffset;
68 @Alive(REG) AllocatableValue framePc;
69 @Alive(REG) AllocatableValue senderSp;
70 @Temp(REG) AllocatableValue scratch;
71 @Temp(REG) AllocatableValue callerReturnPc;
72
73 SPARCHotSpotEnterUnpackFramesStackFrameOp(Register thread, int threadLastJavaSpOffset, int threadLastJavaPcOffset, AllocatableValue framePc, AllocatableValue senderSp, AllocatableValue scratch,
74 PlatformKind wordKind) {
75 super(TYPE);
76 this.thread = thread;
77 this.threadLastJavaSpOffset = threadLastJavaSpOffset;
78 this.threadLastJavaPcOffset = threadLastJavaPcOffset;
79 this.framePc = framePc;
80 this.senderSp = senderSp;
81 this.scratch = scratch;
82 callerReturnPc = o7.asValue(LIRKind.value(wordKind));
83 }
84
85 @Override
86 public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
87 final int totalFrameSize = crb.frameMap.totalFrameSize();
88 Register framePcRegister = asRegister(framePc);
89 Register senderSpRegister = asRegister(senderSp);
90 Register scratchRegister = asRegister(scratch);
91
92 // Save final sender SP to O5_savedSP.
93 masm.mov(senderSpRegister, o5);
94
95 // Load final frame PC.
96 masm.mov(framePcRegister, asRegister(callerReturnPc));
97
98 // Allocate a full sized frame.
99 masm.save(sp, -totalFrameSize, sp);
100
101 masm.mov(i0, o0);
102 masm.mov(i1, o1);
103 masm.mov(i2, o2);
104 masm.mov(i3, o3);
105 masm.mov(i4, o4);
106
107 // Set up last Java values.
108 masm.add(sp, STACK_BIAS, scratchRegister);
109 masm.stx(scratchRegister, new SPARCAddress(thread, threadLastJavaSpOffset));
110
111 // Clear last Java PC.
112 masm.stx(g0, new SPARCAddress(thread, threadLastJavaPcOffset));
113
114 /*
115 * Safe thread register manually since we are not using LEAF_SP for {@link
116 * DeoptimizationStub#UNPACK_FRAMES}.
117 */
118 masm.mov(thread, l7);
119 }
120
121 @Override
122 public boolean leavesRegisterWindow() {
123 return true;
124 }
125 }