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btfssInstr
...
RrfInstruc
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4c7dbdb548 |
@@ -12,9 +12,9 @@ class Main
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public static void main(String[] args) {
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ArrayList<Command> program = new ArrayList<>();
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Memory.workingRegister = 0x01;
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Memory.setRegister(0x14, 0xA7); //240 << 224
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program.add(CommandDecoder.decode(0x1C94));
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Memory.clearCarryBit();
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Memory.setRegister(0x14, 0B00000001); //240 << 224
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program.add(CommandDecoder.decode(0x0C94));
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for(int i = 0; i < program.size(); i++)
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{
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program.get(ProgramCounter.getPc()).execute();
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@@ -1,26 +0,0 @@
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package de.darkress.pic16f84sim.commands;
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import de.darkress.pic16f84sim.microcontroller.Memory;
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import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
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public class Bcf extends BitOrientedCommandUtils implements Command
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{
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private final int address;
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private int bitPlacement;
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public Bcf(int input)
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{
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address = input & 0x007F;
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bitPlacement = checkBitPlacement(input);
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}
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@Override
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public void execute()
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{
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int result = Memory.getRegister(address);
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result &= ~(1 << bitPlacement); //Mask n-th bit with 0
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Memory.setRegister(address, result);
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ProgramCounter.incPC();
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}
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}
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@@ -1,11 +0,0 @@
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package de.darkress.pic16f84sim.commands;
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import de.darkress.pic16f84sim.microcontroller.Memory;
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public class BitOrientedCommandUtils
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{
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protected int checkBitPlacement(int input)
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{
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return ((input & 0x0380) >>7);
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}
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}
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@@ -1,26 +0,0 @@
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package de.darkress.pic16f84sim.commands;
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import de.darkress.pic16f84sim.microcontroller.Memory;
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import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
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public class Bsf extends BitOrientedCommandUtils implements Command
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{
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private final int address;
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private int bitPlacement;
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public Bsf(int input)
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{
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address = input & 0x007F;
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bitPlacement = checkBitPlacement(input);
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}
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@Override
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public void execute()
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{
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int result = Memory.getRegister(address);
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result |= (1 << bitPlacement);
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Memory.setRegister(address, result);
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ProgramCounter.incPC();
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}
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}
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@@ -1,29 +0,0 @@
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package de.darkress.pic16f84sim.commands;
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import de.darkress.pic16f84sim.microcontroller.Memory;
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import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
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public class Btfsc extends BitOrientedCommandUtils implements Command
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{
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private final int address;
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private int bitPlacement;
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public Btfsc(int input)
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{
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address = input & 0x007F;
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bitPlacement = checkBitPlacement(input);
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}
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@Override
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public void execute()
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{
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int result = Memory.getRegister(address);
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if((result & (1 << bitPlacement)) == 0) //Test if bit is clear
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{
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ProgramCounter.incPC();
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}
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ProgramCounter.incPC();
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}
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}
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@@ -1,29 +0,0 @@
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package de.darkress.pic16f84sim.commands;
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import de.darkress.pic16f84sim.microcontroller.Memory;
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import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
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public class Btfss extends BitOrientedCommandUtils implements Command
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{
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private final int address;
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private int bitPlacement;
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public Btfss(int input)
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{
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address = input & 0x007F;
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bitPlacement = checkBitPlacement(input);
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}
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@Override
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public void execute()
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{
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int result = Memory.getRegister(address);
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if((result & (1 << bitPlacement)) > 0) //Test if bit is set
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{
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ProgramCounter.incPC();
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}
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ProgramCounter.incPC();
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}
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}
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@@ -26,7 +26,7 @@ public class Decfsz extends FileRegisterCommandUtils implements Command
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if((result % 256) == 0)
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{
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Nop nop = new Nop();
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nop.execute(); // TODO: What happens if an interrupt gets triggered during the nop execution?
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nop.execute();
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}
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ProgramCounter.incPC();
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}
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@@ -26,7 +26,7 @@ public class Incfsz extends FileRegisterCommandUtils implements Command
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if((result % 256) == 0)
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{
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Nop nop = new Nop();
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nop.execute(); // TODO: What happens if an interrupt gets triggered during the nop execution?
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nop.execute();
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}
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ProgramCounter.incPC();
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}
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@@ -1,49 +0,0 @@
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package de.darkress.pic16f84sim.commands;
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import de.darkress.pic16f84sim.microcontroller.Memory;
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import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
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public class Subwf extends FileRegisterCommandUtils implements Command
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{
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private final int address;
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private final boolean destinationBit;
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public Subwf(int input)
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{
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address = input & 0x007F;
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destinationBit = checkDestinationBit(input);
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}
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@Override
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protected void checkCarryBit(int result)
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{
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if(result <= 255){
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Memory.clearCarryBit();
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} else{
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Memory.setCarryBit();
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}
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}
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@Override
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protected void checkDigitCarryBit(int literal)
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{
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if(((literal & 0x0F) - (Memory.workingRegister & 0x0F)) < 0){
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Memory.clearDigitCarryBit();
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} else{
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Memory.setDigitCarryBit();
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}
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}
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@Override
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public void execute()
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{
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int result = Memory.getRegister(address) - Memory.workingRegister + 256;
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checkZeroBit(result);
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checkCarryBit(result);
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checkDigitCarryBit(Memory.getRegister(address));
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writeToDestination(destinationBit, address, result % 256);
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ProgramCounter.incPC();
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}
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}
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@@ -1,27 +0,0 @@
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package de.darkress.pic16f84sim.commands;
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import de.darkress.pic16f84sim.microcontroller.Memory;
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import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
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public class Swapf extends FileRegisterCommandUtils implements Command
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{
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private final int address;
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private final boolean destinationBit;
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public Swapf(int input)
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{
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address = input & 0x007F;
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destinationBit = checkDestinationBit(input);
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}
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@Override
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public void execute()
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{
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int result = (Memory.getRegister(address) <<4) & 0xF0;
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int tmp = Memory.getRegister(address) >>4;
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result += tmp;
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writeToDestination(destinationBit, address, result);
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ProgramCounter.incPC();
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}
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}
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@@ -1,27 +0,0 @@
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package de.darkress.pic16f84sim.commands;
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import de.darkress.pic16f84sim.microcontroller.Memory;
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import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
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public class Xorwf extends FileRegisterCommandUtils implements Command
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{
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private final int address;
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private final boolean destinationBit;
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public Xorwf(int input)
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{
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address = input & 0x007F;
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destinationBit = checkDestinationBit(input);
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}
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@Override
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public void execute()
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{
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int result = Memory.getRegister(address) ^ Memory.workingRegister;
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checkZeroBit(result);
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writeToDestination(destinationBit, address, result);
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ProgramCounter.incPC();
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}
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}
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@@ -31,11 +31,14 @@ public class CommandDecoder
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case 0xC00:
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return new Rrf(input);
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case 0x200:
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return new Subwf(input);
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//subwf();
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break;
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case 0xE00:
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return new Swapf(input);
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//swapf();
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break;
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case 0x600:
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return new Xorwf(input);
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//xorwf();
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break;
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case 0x3900:
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return new Andlw(input);
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case 0x3800:
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@@ -57,19 +60,25 @@ public class CommandDecoder
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switch(input & 0x3C00)
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{
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case 0x1000:
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return new Bcf(input);
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//bcf();
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break;
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case 0x1400:
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return new Bsf(input);
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//bsf();
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break;
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case 0x1800:
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return new Btfsc(input);
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//btfsc();
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break;
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case 0x1C00:
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return new Btfss(input);
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//btfss();
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break;
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}
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switch(input & 0x3E00)
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{
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case 0x3E00:
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//addlw();
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return new Addlw(input);
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//break;
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case 0x3C00:
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return new Sublw(input);
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}
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