1 /*
   2  * Copyright (c) 2013, 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 package org.graalvm.compiler.hotspot.aarch64;
  24 
  25 import static jdk.vm.ci.aarch64.AArch64.zr;
  26 
  27 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
  28 import org.graalvm.compiler.lir.LIRInstructionClass;
  29 import org.graalvm.compiler.lir.Opcode;
  30 import org.graalvm.compiler.lir.aarch64.AArch64LIRInstruction;
  31 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  32 
  33 import jdk.vm.ci.code.Register;
  34 
  35 @Opcode("CRUNTIME_CALL_EPILOGUE")
  36 public class AArch64HotSpotCRuntimeCallEpilogueOp extends AArch64LIRInstruction {
  37     public static final LIRInstructionClass<AArch64HotSpotCRuntimeCallEpilogueOp> TYPE = LIRInstructionClass.create(AArch64HotSpotCRuntimeCallEpilogueOp.class);
  38 
  39     private final int threadLastJavaSpOffset;
  40     private final int threadLastJavaFpOffset;
  41     private final Register thread;
  42 
  43     public AArch64HotSpotCRuntimeCallEpilogueOp(int threadLastJavaSpOffset, int threadLastJavaFpOffset, Register thread) {
  44         super(TYPE);
  45         this.threadLastJavaSpOffset = threadLastJavaSpOffset;
  46         this.threadLastJavaFpOffset = threadLastJavaFpOffset;
  47         this.thread = thread;
  48     }
  49 
  50     @Override
  51     public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
  52         // Reset last Java frame:
  53         masm.str(64, zr, masm.makeAddress(thread, threadLastJavaSpOffset, 8));
  54         masm.str(64, zr, masm.makeAddress(thread, threadLastJavaFpOffset, 8));
  55     }
  56 }