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comparison agent/src/share/classes/sun/jvm/hotspot/asm/sparc/SPARCFloatRegister.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2002 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.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 }