opcodecpl.java

這是一個8051的模擬器 以java寫成

/**
 * Projet de langage JAVA IFITEP 3 2005 - Simulateur 8051 
 * <p> 
 * D閒inition de l'instruction CPL.
 * Cf.:
 *  - documentation technique 8051
 *  - Ouvrage "Microcontroleur 8051 et 8052", edition Dunod
 *  
 * @author Matthieu SIMON
 * @version 1.0 du 14/06/05
 */
public class OpcodeCPL extends Opcode {
	public void execute(CORE_CPU8051 cpu) throws OpcodeException {
		int tmp;
		if((tmp = decodeAddressingMode(cpu.getCurrentLine().getOperand(1))) == Integer.MAX_VALUE)
			throw new OpcodeException(this, "Bad Addressing Mode");
		
		if(tmp == CORE_CPU8051.PSW)
			CORE_CPU8051.internalDataMem[CORE_CPU8051.PSW] =
				((CORE_CPU8051.internalDataMem[CORE_CPU8051.PSW]&0x7F) | ((~CORE_CPU8051.internalDataMem[CORE_CPU8051.PSW])&0x80))&0xFF;
		else if(tmp == CORE_CPU8051.ACC)
			CORE_CPU8051.internalDataMem[CORE_CPU8051.ACC] = (~CORE_CPU8051.internalDataMem[CORE_CPU8051.ACC])&0xFF;			
		else if(CORE_CPU8051.internalDataMem[CORE_CPU8051.BIT] < 8)
			CORE_CPU8051.internalDataMem[tmp] = (
					(byte)(CORE_CPU8051.internalDataMem[tmp]&(~(1<<CORE_CPU8051.internalDataMem[CORE_CPU8051.BIT]))) |
					(byte)((~CORE_CPU8051.internalDataMem[tmp])&(1<<CORE_CPU8051.internalDataMem[CORE_CPU8051.BIT])))&0xFF;
		else
			throw new OpcodeException(this, "Bad Register Addressing");
		
		CORE_CPU8051.internalDataMem[CORE_CPU8051.BIT] = 8;
		cpu.incCyclesCount(1);
	}
}