1 /*

     2  * Copyright (c) 2003, 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 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 }