hades.models.pic
Class PicDecode

java.lang.Object
  hades.models.pic.PicDecode

public class PicDecode

extends java.lang.Object

PicDecode - Decode instruction. Just split the instruction word into pieces for the different units.

Currently, all fields are decoded for all instructions. Profiling shows that this is not a performance problem.

This class also contains some disassembler support. To disassemble an instruction, first call decode( opcode ), then disassamble().

Field Summary

static int	ADDLW
static int	ADDWF
static int	ALUACTION The four different instruction types
static int	ANDLW
static int	ANDWF
static java.lang.String[]	bank0Names
static java.lang.String[]	bank1Names
static int	BCF
static int	BITACTION
static int	BSF
static int	BTFSC
static int	BTFSS
static int	CALL
static int	CLRF
static int	CLRW
static int	CLRWDT
static int	COMF
static int	DECF
static int	DECFSZ
static int	GOTO
static int	INCF
static int	INCFSZ
static int	IORLW
static int	IORWF
static int	JUMPACTION
static int	LITERALACTION
static int	MOVF
static int	MOVLW
static int	MOVWF
static int	NOP
static int	RETFIE
static int	RETLW
static int	RETURN
static int	RLF
static int	RRF
static int	SLEEP
static int	SUBLW
static int	SUBWF
static int	SWAPF
static int	XORLW
static int	XORWF

Constructor Summary

PicDecode(PicByteReg _statusReg)
Constructor, do reset

Method Summary

void	decode(int word) decode splits the given instruction into the needed parts
java.lang.String	disassemble() convert the current instruction into a Microchip assembler notation.
java.lang.String	disassembleAluInstruction()
java.lang.String	disassembleBitInstruction()
java.lang.String	disassembleJumpInstruction()
java.lang.String	disassembleLiteralInstruction()
void	dump(java.io.PrintStream out) Write everything
int	getAddress() Get address for absolute addressing
int	getAluOperation() Get ALU-operation
int	getBitNumber() Get bitNumber for bit operations
int	getBitOperation() Get Bit-operation
int	getDecoded() Get the word that was decoded last
int	getDestination() Get ALU-destination
int	getInstruction() Get instruction for further decode
int	getJumpOperation() Get Jump-operation
java.lang.String	getJumpTarget()
int	getLiteral() Get literal for literal operations
int	getRegister() Get register-number for register operations
void	por()
void	reset() Reset, init with NOP
void	setEprom(PicEprom _eprom)
int	splitWord(int word, int lsb, int size) Get a part of a word, beginning with lsb and size bits

Methods inherited from class java.lang.Object

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

Field Detail

ALUACTION

public static final int ALUACTION

The four different instruction types

See Also:

Constant Field Values

BITACTION

public static final int BITACTION

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Constant Field Values

JUMPACTION

public static final int JUMPACTION

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Constant Field Values

LITERALACTION

public static final int LITERALACTION

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NOP

public static final int NOP

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RETURN

public static final int RETURN

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RETFIE

public static final int RETFIE

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SLEEP

public static final int SLEEP

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CLRWDT

public static final int CLRWDT

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MOVWF

public static final int MOVWF

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CLRW

public static final int CLRW

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CLRF

public static final int CLRF

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SUBWF

public static final int SUBWF

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DECF

public static final int DECF

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IORWF

public static final int IORWF

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ANDWF

public static final int ANDWF

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XORWF

public static final int XORWF

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ADDWF

public static final int ADDWF

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MOVF

public static final int MOVF

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COMF

public static final int COMF

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INCF

public static final int INCF

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DECFSZ

public static final int DECFSZ

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RRF

public static final int RRF

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RLF

public static final int RLF

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SWAPF

public static final int SWAPF

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INCFSZ

public static final int INCFSZ

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BCF

public static final int BCF

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BSF

public static final int BSF

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BTFSC

public static final int BTFSC

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BTFSS

public static final int BTFSS

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CALL

public static final int CALL

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GOTO

public static final int GOTO

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MOVLW

public static final int MOVLW

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RETLW

public static final int RETLW

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IORLW

public static final int IORLW

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ANDLW

public static final int ANDLW

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XORLW

public static final int XORLW

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SUBLW

public static final int SUBLW

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ADDLW

public static final int ADDLW

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Constant Field Values

bank0Names

public static final java.lang.String[] bank0Names

bank1Names

public static final java.lang.String[] bank1Names

Constructor Detail

PicDecode

public PicDecode(PicByteReg _statusReg)

Constructor, do reset

Method Detail

setEprom

public void setEprom(PicEprom _eprom)

por

public void por()

reset

public void reset()

Reset, init with NOP

splitWord

public int splitWord(int word,
                     int lsb,
                     int size)

Get a part of a word, beginning with lsb and size bits

decode

public void decode(int word)

decode splits the given instruction into the needed parts

getDecoded

public int getDecoded()

Get the word that was decoded last

getRegister

public int getRegister()

Get register-number for register operations

getDestination

public int getDestination()

Get ALU-destination

getBitNumber

public int getBitNumber()

Get bitNumber for bit operations

getLiteral

public int getLiteral()

Get literal for literal operations

getAddress

public int getAddress()

Get address for absolute addressing

getInstruction

public int getInstruction()

Get instruction for further decode

getAluOperation

public int getAluOperation()

Get ALU-operation

getBitOperation

public int getBitOperation()

Get Bit-operation

getJumpOperation

public int getJumpOperation()

Get Jump-operation

dump

public void dump(java.io.PrintStream out)

Write everything

disassemble

public java.lang.String disassemble()

convert the current instruction into a Microchip assembler notation.

disassembleAluInstruction

public java.lang.String disassembleAluInstruction()

disassembleBitInstruction

public java.lang.String disassembleBitInstruction()

disassembleJumpInstruction

public java.lang.String disassembleJumpInstruction()

getJumpTarget

public java.lang.String getJumpTarget()

disassembleLiteralInstruction

public java.lang.String disassembleLiteralInstruction()