Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/asm/Register.java @ 12704:0e998f0daddf
Code cache: make sure we collect statistics even if the compiler is not recognized
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 07 Nov 2013 11:17:23 +0100 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2000, 2002, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.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(); }