Mercurial > hg > graal-compiler
view agent/src/share/classes/sun/jvm/hotspot/asm/x86/X86SegmentRegisters.java @ 132:60b728ec77c1
6652736: well known classes in system dictionary are inefficiently processed
Summary: combine many scalar variables into a single enum-indexed array in SystemDictionary.
Reviewed-by: kvn
author | jrose |
---|---|
date | Tue, 29 Apr 2008 19:45:22 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2003 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.x86; import sun.jvm.hotspot.utilities.*; public class X86SegmentRegisters { public static final int NUM_SEGMENT_REGISTERS = 6; public static final X86SegmentRegister ES; public static final X86SegmentRegister CS; public static final X86SegmentRegister SS; public static final X86SegmentRegister DS; public static final X86SegmentRegister FS; public static final X86SegmentRegister GS; private static X86SegmentRegister segmentRegisters[]; static { //Segment registers ES = new X86SegmentRegister(0, "%es"); CS = new X86SegmentRegister(1, "%cs"); SS = new X86SegmentRegister(2, "%ss"); DS = new X86SegmentRegister(3, "%ds"); FS = new X86SegmentRegister(4, "%fs"); GS = new X86SegmentRegister(5, "%gs"); segmentRegisters = (new X86SegmentRegister[] { ES, CS, SS, DS, FS, GS }); } public static int getNumberOfRegisters() { return NUM_SEGMENT_REGISTERS; } public static X86SegmentRegister getSegmentRegister(int regNum) { if (Assert.ASSERTS_ENABLED) { Assert.that(regNum > -1 && regNum < NUM_SEGMENT_REGISTERS, "invalid segment register number!"); } return segmentRegisters[regNum]; } }