/*
* Copyright (c) 2007, 2011, 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 com.sun.max.asm.gen.cisc.x86;
import static com.sun.max.asm.gen.cisc.x86.HexByte.*;
/**
* x86 instruction prefix bytes.
*/
public final class X86Opcode {
private X86Opcode() {
}
public static final HexByte SEG_ES = _26;
public static final HexByte SEG_SS = _36;
public static final HexByte SEG_CS = _2E;
public static final HexByte SEG_DS = _3E;
public static final HexByte REX_MIN = _40;
public static final HexByte REX_MAX = _4F;
public static final HexByte SEG_FS = _64;
public static final HexByte SEG_GS = _65;
public static final HexByte OPERAND_SIZE = _66;
public static final HexByte ADDRESS_SIZE = _67;
public static final HexByte FWAIT = _9B;
public static final HexByte LOCK = _F0;
public static final HexByte REPNE = _F2;
public static final HexByte REPE = _F3;
public static boolean isRexPrefix(HexByte opcode) {
return X86Opcode.REX_MIN.ordinal() <= opcode.ordinal() && opcode.ordinal() <= X86Opcode.REX_MAX.ordinal();
}
public static boolean isFloatingPointEscape(HexByte opcode) {
switch (opcode) {
case _D8:
case _D9:
case _DA:
case _DB:
case _DC:
case _DD:
case _DE:
case _DF:
return true;
default:
return false;
}
}
}