asm
Class AsmIns

java.lang.Object
  |
  +--asm.AsmIns

public class AsmIns

extends java.lang.Object

Represents a single assembly instruction. In writing this, I've come to realize that the MIPS instruction set is not so regular after all...

Field Summary

(package private) static java.util.Map	funcMap Maps mnemonic -> integer (func field)
(package private) static java.util.Map	funcValMap Maps integer -> instruction mnemonic.
(package private) int	m_ins
(package private) boolean	m_isJump
(package private) java.lang.String	m_label
(package private) java.lang.String	m_labelRef
(package private) int	m_line
(package private) int	m_num
(package private) static java.util.Map	opMap Maps mnemonic -> integer (opcode)
(package private) static java.util.Map	opValMap Maps integer -> instruction mnemonic
(package private) static java.util.Map	regMap Maps mnemonic -> integer (register number)
(package private) static java.util.Map	regValMap Maps integer -> register name
(package private) static java.util.Map	typeMap Maps opcode mnemonic (string) -> encoding type.

Constructor Summary

AsmIns(int line, java.lang.String labelRef)
Create a new instruction

Method Summary

void	addRefTo(java.util.Map refMap) If this instruction makes a reference to a label, its index is entered into the reference map.
static java.lang.String	decodeIns(int ins) Decode this instruction.
void	enc(java.lang.String op)
void	encBType(java.lang.String op, java.lang.String rs, int imm) Encode a one register branch instruction, eg: BGEZ
void	encIType(java.lang.String op, java.lang.String rt, java.lang.String rs, int imm) Encode as an Itype instruction: two register branches and immediat arithmetic instructions, and loads/stores
void	encJRType(java.lang.String op, java.lang.String reg) Encode as a JRtype instruction.
void	encJType(java.lang.String op, int imm) Encode as a Jtype instruction.
void	encRType(java.lang.String op, java.lang.String rd, java.lang.String rs, java.lang.String rt) Encode as an Rtype instruction.
(package private) static void	loadDecodeMap(java.util.Map map, java.lang.String fileName) DecodeMap must contains bindings Integer->String
(package private) static void	loadMap(java.util.Map map, java.lang.String fileName)
void	setNum(int num)
java.lang.String	toString()
(package private) static int	translateFunc(java.lang.String op)
(package private) static int	translateOp(java.lang.String op)
(package private) static int	translateReg(java.lang.String reg)

Methods inherited from class java.lang.Object

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

Field Detail

m_line

int m_line

m_ins

int m_ins

m_num

int m_num

m_labelRef

java.lang.String m_labelRef

m_label

java.lang.String m_label

m_isJump

boolean m_isJump

regMap

static java.util.Map regMap

Maps mnemonic -> integer (register number)

opMap

static java.util.Map opMap

Maps mnemonic -> integer (opcode)

funcMap

static java.util.Map funcMap

Maps mnemonic -> integer (func field)

regValMap

static java.util.Map regValMap

Maps integer -> register name

opValMap

static java.util.Map opValMap

Maps integer -> instruction mnemonic

funcValMap

static java.util.Map funcValMap

Maps integer -> instruction mnemonic.

typeMap

static java.util.Map typeMap

Maps opcode mnemonic (string) -> encoding type. 0 = r-type, 1 = i-type, 2 = j-type, 3 = jr-type, 4 = simple

Constructor Detail

AsmIns

public AsmIns(int line,
              java.lang.String labelRef)

Create a new instruction

Method Detail

loadMap

static void loadMap(java.util.Map map,
                    java.lang.String fileName)
             throws java.io.IOException

java.io.IOException

loadDecodeMap

static void loadDecodeMap(java.util.Map map,
                          java.lang.String fileName)
                   throws java.io.IOException

DecodeMap must contains bindings Integer->String

java.io.IOException

translateOp

static int translateOp(java.lang.String op)

translateReg

static int translateReg(java.lang.String reg)

translateFunc

static int translateFunc(java.lang.String op)

decodeIns

public static java.lang.String decodeIns(int ins)

Decode this instruction.

setNum

public void setNum(int num)

addRefTo

public void addRefTo(java.util.Map refMap)

If this instruction makes a reference to a label, its index is entered into the reference map.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

encRType

public void encRType(java.lang.String op,
                     java.lang.String rd,
                     java.lang.String rs,
                     java.lang.String rt)

Encode as an Rtype instruction.

encIType

public void encIType(java.lang.String op,
                     java.lang.String rt,
                     java.lang.String rs,
                     int imm)

Encode as an Itype instruction: two register branches and immediat arithmetic instructions, and loads/stores

encBType

public void encBType(java.lang.String op,
                     java.lang.String rs,
                     int imm)

Encode a one register branch instruction, eg: BGEZ

encJType

public void encJType(java.lang.String op,
                     int imm)

Encode as a Jtype instruction.

encJRType

public void encJRType(java.lang.String op,
                      java.lang.String reg)

Encode as a JRtype instruction.

enc

public void enc(java.lang.String op)