| /* |
| * Copyright 2002-2003 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.asm.*; |
| |
| public class FloatGRPDecoder extends FPInstructionDecoder { |
| |
| final private int number; |
| |
| //Please refer to IA-32 Intel Architecture Software Developer's Manual Volume 2 |
| //APPENDIX A - Escape opcodes |
| |
| private static final FPInstructionDecoder floatGRPMap[][] = { |
| /* d9_2 */ |
| { |
| new FPInstructionDecoder("fnop"), |
| null, |
| null, |
| null, |
| null, |
| null, |
| null, |
| null |
| }, |
| /* d9_4 */ |
| { |
| new FPInstructionDecoder("fchs"), |
| new FPInstructionDecoder("fabs"), |
| null, |
| null, |
| new FPInstructionDecoder("ftst"), |
| new FPInstructionDecoder("fxam"), |
| null, |
| null |
| }, |
| /* d9_5 */ |
| { |
| new FPInstructionDecoder("fld1"), |
| new FPInstructionDecoder("fldl2t"), |
| new FPInstructionDecoder("fldl2e"), |
| new FPInstructionDecoder("fldpi"), |
| new FPInstructionDecoder("fldlg2"), |
| new FPInstructionDecoder("fldln2"), |
| new FPInstructionDecoder("fldz"), |
| null |
| }, |
| /* d9_6 */ |
| { |
| new FPInstructionDecoder("f2xm1"), |
| new FPInstructionDecoder("fyl2x"), |
| new FPInstructionDecoder("fptan"), |
| new FPInstructionDecoder("fpatan"), |
| new FPInstructionDecoder("fxtract"), |
| new FPInstructionDecoder("fprem1"), |
| new FPInstructionDecoder("fdecstp"), |
| new FPInstructionDecoder("fincstp") |
| }, |
| /* d9_7 */ |
| { |
| new FPInstructionDecoder("fprem"), |
| new FPInstructionDecoder("fyl2xp1"), |
| new FPInstructionDecoder("fsqrt"), |
| new FPInstructionDecoder("fsincos"), |
| new FPInstructionDecoder("frndint"), |
| new FPInstructionDecoder("fscale"), |
| new FPInstructionDecoder("fsin"), |
| new FPInstructionDecoder("fcos") |
| }, |
| /* da_5 */ |
| { |
| null, |
| new FPInstructionDecoder("fucompp"), |
| null, |
| null, |
| null, |
| null, |
| null, |
| null |
| }, |
| /* db_4 */ |
| { |
| new FPInstructionDecoder("feni(287 only)"), |
| new FPInstructionDecoder("fdisi(287 only)"), |
| new FPInstructionDecoder("fNclex"), |
| new FPInstructionDecoder("fNinit"), |
| new FPInstructionDecoder("fNsetpm(287 only)"), |
| null, |
| null, |
| null |
| }, |
| /* de_3 */ |
| { |
| null, |
| new FPInstructionDecoder("fcompp"), |
| null, |
| null, |
| null, |
| null, |
| null, |
| null |
| }, |
| /* df_4 */ |
| { |
| new FPInstructionDecoder("fNstsw"), |
| null, |
| null, |
| null, |
| null, |
| null, |
| null, |
| null |
| } |
| }; |
| |
| public FloatGRPDecoder(String name, int number) { |
| super(name); |
| this.number = number; |
| } |
| |
| public Instruction decode(byte[] bytesArray, int index, int instrStartIndex, int segmentOverride, int prefixes, X86InstructionFactory factory) { |
| this.byteIndex = index; |
| this.instrStartIndex = instrStartIndex; |
| this.prefixes = prefixes; |
| |
| int ModRM = readByte(bytesArray, byteIndex); |
| int rm = ModRM & 7; |
| |
| FPInstructionDecoder instrDecoder = null; |
| instrDecoder = floatGRPMap[number][rm]; |
| |
| Instruction instr = null; |
| if(instrDecoder != null) { |
| instr = instrDecoder.decode(bytesArray, byteIndex, instrStartIndex, segmentOverride, prefixes, factory); |
| byteIndex = instrDecoder.getCurrentIndex(); |
| } else { |
| instr = factory.newIllegalInstruction(); |
| } |
| return instr; |
| } |
| } |