nl.kbna.dioscuri.module.cpu
Class Instruction_CMP_EbGb

java.lang.Object
  nl.kbna.dioscuri.module.cpu.Instruction_CMP_EbGb

All Implemented Interfaces:

Instruction

public class Instruction_CMP_EbGb
extends java.lang.Object
implements Instruction

Intel opcode 38
Byte-sized comparison (SUB) of memory/register ("destination") with register (source).
The addressbyte determines the source (rrr bits) and "destination" (sss bits).
Flags modified: OF, SF, ZF, AF, PF, CF

Field Summary

(package private) byte	addressByte
private CPU	cpu
(package private) byte	destinationValue
(package private) byte[]	memoryReferenceDisplacement
(package private) byte[]	memoryReferenceLocation
(package private) boolean	operandWordSize
(package private) byte	registerHighLow
(package private) byte	sourceValue
(package private) byte	tempResult

Constructor Summary

Instruction_CMP_EbGb()
Class constructor

Instruction_CMP_EbGb(CPU processor)
Class constructor specifying processor reference

Method Summary

void	execute() Byte-sized comparison (SUB) of memory/register with register.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

cpu

private CPU cpu

operandWordSize

boolean operandWordSize

addressByte

byte addressByte

memoryReferenceLocation

byte[] memoryReferenceLocation

memoryReferenceDisplacement

byte[] memoryReferenceDisplacement

sourceValue

byte sourceValue

destinationValue

byte destinationValue

registerHighLow

byte registerHighLow

tempResult

byte tempResult

Constructor Detail

Instruction_CMP_EbGb

public Instruction_CMP_EbGb()

Class constructor

Instruction_CMP_EbGb

public Instruction_CMP_EbGb(CPU processor)

Class constructor specifying processor reference

Parameters:

processor - Reference to CPU class

Method Detail

execute

public void execute()

Byte-sized comparison (SUB) of memory/register with register.
Does not update any registers, only sets appropriate flags.

Specified by:

execute in interface Instruction