AMD64HotSpotLeaveCurrentStackFrameOp.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2013, 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 */
23package org.graalvm.compiler.hotspot.amd64;
24
25import static jdk.vm.ci.amd64.AMD64.rdx;
26
27import org.graalvm.compiler.asm.amd64.AMD64Address;
28import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
29import org.graalvm.compiler.lir.LIRInstructionClass;
30import org.graalvm.compiler.lir.Opcode;
31import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
32import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
33import org.graalvm.compiler.lir.framemap.FrameMap;
34
35import jdk.vm.ci.code.Register;
36import jdk.vm.ci.code.RegisterConfig;
37import jdk.vm.ci.code.RegisterSaveLayout;
38import jdk.vm.ci.meta.JavaKind;
39
40/**
41 * Pops the current frame off the stack including the return address and restores the return
42 * registers stored on the stack.
43 */
44@Opcode("LEAVE_CURRENT_STACK_FRAME")
45final class AMD64HotSpotLeaveCurrentStackFrameOp extends AMD64HotSpotEpilogueOp {
46
47    public static final LIRInstructionClass<AMD64HotSpotLeaveCurrentStackFrameOp> TYPE = LIRInstructionClass.create(AMD64HotSpotLeaveCurrentStackFrameOp.class);
48
49    private final SaveRegistersOp saveRegisterOp;
50
51    AMD64HotSpotLeaveCurrentStackFrameOp(SaveRegistersOp saveRegisterOp) {
52        super(TYPE);
53        this.saveRegisterOp = saveRegisterOp;
54    }
55
56    @Override
57    public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
58        FrameMap frameMap = crb.frameMap;
59        RegisterConfig registerConfig = frameMap.getRegisterConfig();
60        RegisterSaveLayout registerSaveLayout = saveRegisterOp.getMap(frameMap);
61        Register stackPointer = registerConfig.getFrameRegister();
62
63        // Restore integer result register.
64        final int stackSlotSize = frameMap.getTarget().wordSize;
65        Register integerResultRegister = registerConfig.getReturnRegister(JavaKind.Long);
66        masm.movptr(integerResultRegister, new AMD64Address(stackPointer, registerSaveLayout.registerToSlot(integerResultRegister) * stackSlotSize));
67        masm.movptr(rdx, new AMD64Address(stackPointer, registerSaveLayout.registerToSlot(rdx) * stackSlotSize));
68
69        // Restore float result register.
70        Register floatResultRegister = registerConfig.getReturnRegister(JavaKind.Double);
71        masm.movdbl(floatResultRegister, new AMD64Address(stackPointer, registerSaveLayout.registerToSlot(floatResultRegister) * stackSlotSize));
72
73        /*
74         * All of the register save area will be popped of the stack. Only the return address
75         * remains.
76         */
77        leaveFrameAndRestoreRbp(crb, masm);
78
79        // Remove return address.
80        masm.addq(stackPointer, crb.target.arch.getReturnAddressSize());
81    }
82}
83