1 /*
   2  * Copyright (c) 2012, 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.amd64;
  26 
  27 import org.graalvm.compiler.asm.amd64.AMD64Address;
  28 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
  29 import org.graalvm.compiler.lir.LIRInstructionClass;
  30 import org.graalvm.compiler.lir.Opcode;
  31 import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction;
  32 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  33 
  34 import jdk.vm.ci.code.Register;
  35 
  36 @Opcode("CRUNTIME_CALL_EPILOGUE")
  37 final class AMD64HotSpotCRuntimeCallEpilogueOp extends AMD64LIRInstruction {
  38     public static final LIRInstructionClass<AMD64HotSpotCRuntimeCallEpilogueOp> TYPE = LIRInstructionClass.create(AMD64HotSpotCRuntimeCallEpilogueOp.class);
  39 
  40     private final int threadLastJavaSpOffset;
  41     private final int threadLastJavaFpOffset;
  42     private final int threadLastJavaPcOffset;
  43     private final Register thread;
  44 
  45     AMD64HotSpotCRuntimeCallEpilogueOp(int threadLastJavaSpOffset, int threadLastJavaFpOffset, int threadLastJavaPcOffset, Register thread) {
  46         super(TYPE);
  47         this.threadLastJavaSpOffset = threadLastJavaSpOffset;
  48         this.threadLastJavaFpOffset = threadLastJavaFpOffset;
  49         this.threadLastJavaPcOffset = threadLastJavaPcOffset;
  50         this.thread = thread;
  51     }
  52 
  53     @Override
  54     public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
  55         // reset last Java frame:
  56         masm.movslq(new AMD64Address(thread, threadLastJavaSpOffset), 0);
  57         masm.movslq(new AMD64Address(thread, threadLastJavaFpOffset), 0);
  58         masm.movslq(new AMD64Address(thread, threadLastJavaPcOffset), 0);
  59     }
  60 }