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annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/cisc/x86/X86Opcode.java @ 3733:e233f5660da4

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Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
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3733
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1 /*
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2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.sun.max.asm.gen.cisc.x86;
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24
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25 import static com.sun.max.asm.gen.cisc.x86.HexByte.*;
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26
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27 /**
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28 * x86 instruction prefix bytes.
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29 */
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30 public final class X86Opcode {
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31
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32 private X86Opcode() {
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33 }
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34
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35 public static final HexByte SEG_ES = _26;
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36 public static final HexByte SEG_SS = _36;
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37 public static final HexByte SEG_CS = _2E;
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38 public static final HexByte SEG_DS = _3E;
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39 public static final HexByte REX_MIN = _40;
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40 public static final HexByte REX_MAX = _4F;
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41 public static final HexByte SEG_FS = _64;
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42 public static final HexByte SEG_GS = _65;
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43 public static final HexByte OPERAND_SIZE = _66;
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44 public static final HexByte ADDRESS_SIZE = _67;
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45 public static final HexByte FWAIT = _9B;
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46 public static final HexByte LOCK = _F0;
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47 public static final HexByte REPNE = _F2;
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48 public static final HexByte REPE = _F3;
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49
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50 public static boolean isRexPrefix(HexByte opcode) {
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51 return X86Opcode.REX_MIN.ordinal() <= opcode.ordinal() && opcode.ordinal() <= X86Opcode.REX_MAX.ordinal();
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52 }
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53
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54 public static boolean isFloatingPointEscape(HexByte opcode) {
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55 switch (opcode) {
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56 case _D8:
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57 case _D9:
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58 case _DA:
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59 case _DB:
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60 case _DC:
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61 case _DD:
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62 case _DE:
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63 case _DF:
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64 return true;
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65 default:
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66 return false;
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67 }
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68 }
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69
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70 }