1 /*

     2  * Copyright (c) 2002, 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.sparc;

    26 

    27 import sun.jvm.hotspot.asm.Register;

    28 import sun.jvm.hotspot.utilities.Assert;

    29 

    30 public class SPARCFloatRegister extends SPARCRegister {

    31 

    32     public SPARCFloatRegister(int number) {

    33         super(number);

    34     }

    35 

    36     public int getNumber() {

    37         return number;

    38     }

    39 

    40     public static final int SINGLE_PRECISION = 1;

    41     public static final int DOUBLE_PRECISION = 2;

    42     public static final int QUAD_PRECISION = 3;

    43 

    44     public int getNumber(int width) {

    45         switch (width) {

    46         case SINGLE_PRECISION:

    47             Assert.that(number < 32, "bad single-prec fp register");

    48             return number;

    49 

    50         case DOUBLE_PRECISION:

    51             Assert.that(number < 64 && (number & 1) == 0, "bad double-prec fp register");

    52             return number & 0x1e | (number & 0x20) >> 5;

    53 

    54         case QUAD_PRECISION:

    55             Assert.that(number < 64 && (number & 3) == 0, "bad quad-prec fp register");

    56             return number & 0x1c | (number & 0x20) >> 5;

    57         }

    58         throw new RuntimeException("Invalid floating point width supplied");

    59     }

    60 

    61     private static final int nofRegisters = 63;

    62     public int getNumberOfRegisters() {

    63         return nofRegisters;

    64     }

    65 

    66     public boolean isFloat() {

    67         return true;

    68     }

    69 

    70     public boolean isFramePointer() {

    71         return false;

    72     }

    73 

    74     public boolean isStackPointer() {

    75         return false;

    76     }

    77 

    78     public boolean isV9Only() {

    79         return number > 31;

    80     }

    81 

    82     public boolean isValid() {

    83         return number >= 0 && number < nofRegisters;

    84     }

    85 

    86     public String toString() {

    87         return SPARCFloatRegisters.getRegisterName(number);

    88     }

    89 

    90 }