/*
 * 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.
 *  
 */

/* 
 * Original code for this class taken from the Java HotSpot VM. 
 * Modified for use with the Jakstab project. All modifications 
 * Copyright 2007-2015 Johannes Kinder <jk@jakstab.org>
 */

package org.jakstab.disasm.x86;

import org.jakstab.asm.Instruction;
import org.jakstab.asm.Operand;
import org.jakstab.asm.x86.X86InstructionFactory;
import org.jakstab.util.BinaryInputBuffer;
import org.jakstab.util.Logger;

// basic float instruction decoder class
public class FPInstructionDecoder extends InstructionDecoder {

	private final static Logger logger = Logger.getLogger(FPInstructionDecoder.class);


	public FPInstructionDecoder(String name) {
		super(name);
	}
	public FPInstructionDecoder(String name, int addrMode1, int operandType1) {
		super(name, addrMode1, operandType1);
	}
	public FPInstructionDecoder(String name, int addrMode1, int operandType1, int addrMode2, int operandType2) {
		super(name, addrMode1, operandType1, addrMode2, operandType2);
	}

	protected Instruction decodeInstruction(BinaryInputBuffer bytesArray, boolean operandSize, boolean addrSize, X86InstructionFactory factory) {
		Operand op1 = getOperand1(bytesArray, operandSize, addrSize);

		if (byteIndex <= instrStartIndex + 1) {
			logger.warn("Adjusting instruction size of float instruction " + name);
			byteIndex = instrStartIndex + 2;
		}


		int size = byteIndex - instrStartIndex;
		return factory.newFPInstruction(name, op1, size, prefixes);
	}
}