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view agent/src/share/classes/sun/jvm/hotspot/asm/sparc/SPARCFloatRegister.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | c18cbe5936b8 |
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/* * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.asm.sparc; import sun.jvm.hotspot.asm.Register; import sun.jvm.hotspot.utilities.Assert; public class SPARCFloatRegister extends SPARCRegister { public SPARCFloatRegister(int number) { super(number); } public int getNumber() { return number; } public static final int SINGLE_PRECISION = 1; public static final int DOUBLE_PRECISION = 2; public static final int QUAD_PRECISION = 3; public int getNumber(int width) { switch (width) { case SINGLE_PRECISION: Assert.that(number < 32, "bad single-prec fp register"); return number; case DOUBLE_PRECISION: Assert.that(number < 64 && (number & 1) == 0, "bad double-prec fp register"); return number & 0x1e | (number & 0x20) >> 5; case QUAD_PRECISION: Assert.that(number < 64 && (number & 3) == 0, "bad quad-prec fp register"); return number & 0x1c | (number & 0x20) >> 5; } throw new RuntimeException("Invalid floating point width supplied"); } private static final int nofRegisters = 63; public int getNumberOfRegisters() { return nofRegisters; } public boolean isFloat() { return true; } public boolean isFramePointer() { return false; } public boolean isStackPointer() { return false; } public boolean isV9Only() { return number > 31; } public boolean isValid() { return number >= 0 && number < nofRegisters; } public String toString() { return SPARCFloatRegisters.getRegisterName(number); } }