1 /*
   2  * Copyright (c) 2012, 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.amd64;
  24 
  25 import static jdk.vm.ci.amd64.AMD64.rsp;
  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
  37 final class AMD64HotSpotCRuntimeCallPrologueOp extends AMD64LIRInstruction {
  38     public static final LIRInstructionClass<AMD64HotSpotCRuntimeCallPrologueOp> TYPE = LIRInstructionClass.create(AMD64HotSpotCRuntimeCallPrologueOp.class);
  39 
  40     private final int threadLastJavaSpOffset;
  41     private final Register thread;
  42 
  43     AMD64HotSpotCRuntimeCallPrologueOp(int threadLastJavaSpOffset, Register thread) {
  44         super(TYPE);
  45         this.threadLastJavaSpOffset = threadLastJavaSpOffset;
  46         this.thread = thread;
  47     }
  48 
  49     @Override
  50     public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
  51         // save last Java frame
  52         masm.movq(new AMD64Address(thread, threadLastJavaSpOffset), rsp);
  53     }
  54 }