opcodeanl.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 ANL.
 * Cf.:
 *  - documentation technique 8051
 *  - Ouvrage "Microcontroleur 8051 et 8052", edition Dunod
 *  
 * @author Matthieu SIMON
 * @version 1.0 du 14/06/05
 */
public class OpcodeANL extends Opcode {
	public void execute(CORE_CPU8051 cpu) throws OpcodeException {
		int dest, src;
		if((dest = decodeAddressingMode(cpu.getCurrentLine().getOperand(1))) == Integer.MAX_VALUE)
			throw new OpcodeException(this, "Bad Addressing Mode");
		if((src = decodeAddressingMode(cpu.getCurrentLine().getOperand(2))) == Integer.MAX_VALUE)
			throw new OpcodeException(this, "Bad Addressing Mode");
		
		if(dest == CORE_CPU8051.PSW && CORE_CPU8051.internalDataMem[CORE_CPU8051.BIT] < 8) { // adressage au niveau du bit
			if((CORE_CPU8051.internalDataMem[src] & (1<<CORE_CPU8051.internalDataMem[CORE_CPU8051.BIT])) == 0)
				CORE_CPU8051.internalDataMem[CORE_CPU8051.PSW] &= ~0x80;	
			CORE_CPU8051.internalDataMem[CORE_CPU8051.BIT] = 8;	
		}
		else 
			CORE_CPU8051.internalDataMem[dest] &= CORE_CPU8051.internalDataMem[src];
		
		if(dest != CORE_CPU8051.ACC && src != CORE_CPU8051.ACC)
			cpu.incCyclesCount(1);
		cpu.incCyclesCount(1);
	}
}