Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/asm/Register.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/asm/Register.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,81 @@ +/* + * Copyright 2000-2002 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; + +/** <P> Register is an abstraction over machine registers. </P> + + <P> FIXME: should align constants with underlying VM code </P> */ + +public abstract class Register extends ImmediateOrRegister { + /** Corresponds to the machine register code. -1 stands for invalid + register (initial value). */ + protected int number; + + public Register() { + number = -1; + } + + public Register(int number) { + this.number = number; + } + + /** Must be overridden by subclass to indicate number of available + registers on this platform */ + public abstract int getNumberOfRegisters(); + + public boolean isValid() { + return ((0 <= number) && (number <= getNumberOfRegisters())); + } + + public int getNumber() { + return number; + } + + public boolean equals(Object x) { + if (x == null) { + return false; + } + + if (!getClass().equals(x.getClass())) { + return false; + } + + Register reg = (Register) x; + + return (reg.getNumber() == getNumber()); + } + + public int hashCode() { + return number; + } + + public boolean isRegister() { + return true; + } + + public abstract boolean isStackPointer(); + public abstract boolean isFramePointer(); + public abstract boolean isFloat(); +}