1 /*
   2  * Copyright 2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.asm.amd64;
  26 
  27 import sun.jvm.hotspot.utilities.*;
  28 
  29 public class AMD64Registers {
  30    public static final int NUM_REGISTERS = 16;
  31 
  32    public static final AMD64Register RAX;
  33    public static final AMD64Register RCX;
  34    public static final AMD64Register RDX;
  35    public static final AMD64Register RBX;
  36    public static final AMD64Register RSP;
  37    public static final AMD64Register RBP;
  38    public static final AMD64Register RSI;
  39    public static final AMD64Register RDI;
  40    public static final AMD64Register R8;
  41    public static final AMD64Register R9;
  42    public static final AMD64Register R10;
  43    public static final AMD64Register R11;
  44    public static final AMD64Register R12;
  45    public static final AMD64Register R13;
  46    public static final AMD64Register R14;
  47    public static final AMD64Register R15;
  48 
  49    private static final AMD64Register[] registers;
  50 
  51    static {
  52       RAX = new AMD64Register(0, "rax");
  53       RCX = new AMD64Register(1, "rcx");
  54       RDX = new AMD64Register(2, "rdx");
  55       RBX = new AMD64Register(3, "rbx");
  56       RSP = new AMD64Register(4, "rsp");
  57       RBP = new AMD64Register(5, "rbp");
  58       RSI = new AMD64Register(6, "rsi");
  59       RDI = new AMD64Register(7, "rdi");
  60       R8  = new AMD64Register(8, "r8" );
  61       R9  = new AMD64Register(9, "r9" );
  62       R10 = new AMD64Register(10,"r10");
  63       R11 = new AMD64Register(11,"r11");
  64       R12 = new AMD64Register(12,"r12");
  65       R13 = new AMD64Register(13,"r13");
  66       R14 = new AMD64Register(14,"r14");
  67       R15 = new AMD64Register(15,"r15");
  68       registers = new AMD64Register[] {
  69                      RAX, RCX, RDX, RBX, RSP, RBP, RSI, RDI,
  70                      R8, R9, R10, R11, R12, R13, R14, R15
  71                   };
  72    }
  73 
  74    public static int getNumberOfRegisters() {
  75       return NUM_REGISTERS;
  76    }
  77 
  78    public static AMD64Register getRegister(int regNum) {
  79       if (Assert.ASSERTS_ENABLED) {
  80          Assert.that(regNum > -1 && regNum < NUM_REGISTERS, "invalid integer register number!");
  81       }
  82       return registers[regNum];
  83    }
  84 
  85    //Return the register name
  86    public static String getRegisterName(int regNum) {
  87       if (Assert.ASSERTS_ENABLED) {
  88          Assert.that(regNum > -1 && regNum < NUM_REGISTERS, "invalid integer register number!");
  89       }
  90       return registers[regNum].toString();
  91    }
  92 }