1 /*
   2  * Copyright (c) 2011, 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.meta;
  24 
  25 import jdk.vm.ci.code.Register;
  26 
  27 public class HotSpotRegisters implements HotSpotRegistersProvider {
  28 
  29     private final Register threadRegister;
  30     private final Register heapBaseRegister;
  31     private final Register stackPointerRegister;
  32 
  33     public HotSpotRegisters(Register threadRegister, Register heapBaseRegister, Register stackPointerRegister) {
  34         this.threadRegister = threadRegister;
  35         this.heapBaseRegister = heapBaseRegister;
  36         this.stackPointerRegister = stackPointerRegister;
  37     }
  38 
  39     @Override
  40     public Register getThreadRegister() {
  41         assert !threadRegister.equals(Register.None) : "thread register is not defined";
  42         return threadRegister;
  43     }
  44 
  45     @Override
  46     public Register getHeapBaseRegister() {
  47         assert !heapBaseRegister.equals(Register.None) : "heap base register is not defined";
  48         return heapBaseRegister;
  49     }
  50 
  51     @Override
  52     public Register getStackPointerRegister() {
  53         assert !stackPointerRegister.equals(Register.None) : "stack pointer register is not defined";
  54         return stackPointerRegister;
  55     }
  56 }