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 }