com.cmpware.cmp.models
Class MIPS32

java.lang.Object
  com.cmpware.cmp.Memory
      com.cmpware.cmp.Processor
          com.cmpware.tools.AutoModel
              com.cmpware.cmp.models.MIPS32

All Implemented Interfaces:

ReadWriteInterface

Direct Known Subclasses:

MIPS32EX

public class MIPS32
extends AutoModel

This is an AutoModel implementation of the MIPS32 processor.

Copyright (c) 2006 Cmpware, Inc. All Rights Reserved.

Author:

SAG

Nested Class Summary

(package private) static class

MIPS32.SREG This class defines the Special Register indicies

Nested classes/interfaces inherited from class com.cmpware.tools.AutoModel

AutoModel.Asm, AutoModel.Decode, AutoModel.Field, AutoModel.Format, AutoModel.Function, AutoModel.Instruction, AutoModel.Symbol

Field Summary

protected static AutoModel.Field	f_imm16
protected static AutoModel.Field	f_imm26
protected static AutoModel.Field	f_rd
protected static AutoModel.Field	f_rs
protected static AutoModel.Field	f_rt
protected static AutoModel.Field	f_sa
protected int	imm16 The zero-extended 16-bit immediate data
protected static AutoModel.Format	immediate
protected int	instrIndex The lower 28-bits of jump target address (shifted right 2)
protected static AutoModel.Format	jump
protected static AutoModel.Field	op
protected static AutoModel.Field	op2
protected int	rd The value in the 'd' register
protected static AutoModel.Format	regToReg
protected static AutoModel.Format	regToReg2
protected int	rs The value in the 's' register
protected int	rt The value in the 't' register
protected int	sa The value in the 'sa' value
protected int	simm16 The sign-extended 16-bit immediate data

Fields inherited from class com.cmpware.tools.AutoModel

copyright, currentInstr, currentInstrType, instructionSizes, TRACE

Fields inherited from class com.cmpware.cmp.Processor

bkpt, branchAddr, branchDelay, breakpointHit, currentBranchDelay, currentInstrCode, cycleCount, elf, idlePower, iMix, instructionSize, name, noop, opcodeName, pc, prevInstr, prevInstrCode, r, regName, runningPower, sr, sregName, stall, stallCount

Fields inherited from class com.cmpware.cmp.Memory

BIG, LITTLE

Constructor Summary

MIPS32()
The constructor

Method Summary

protected static int	addCarry(int src1, int src2, int result) This method is used to determine if an add carry has occurred.
protected static boolean	isAddOverflow(int result, int src1, int src2) This method is used to determine if an add overflow has occurred.
protected static boolean	isSubOverflow(int src1, int src2, int result) This method is used to determine if a sub overflow has occurred.
static void	main(java.lang.String[] args) This enables the stand-alone assembler and disassembler.
void	postExecute(int instr) This method is called immediately after execution and may be overloaded to do things like save instruction field values to locals.
void	preExecute(int instr) This method is called immediately before execution and may be overloaded to do things like save instruction field values to locals.
protected static AutoModel.Decode	regimm(int a) This is just a simple helper function used in decoding 'Regimm' instructions.
void	reset() This method resets the processor.
protected static int	sign(int a) This method returns the sign bit for 32 bit value.
protected static AutoModel.Decode	simple(int a) This is a helper function used in decoding simple instructions.
protected static AutoModel.Decode	special(int a) This is just a simple helper function used in decoding 'Special' instructions.
protected static AutoModel.Decode	special2(int a) This is just a simple helper function used in decoding 'Special2' instructions.
protected static int	subCarry(int src1, int src2, int result) This method is used to determine if a sub carry has occurred.

Methods inherited from class com.cmpware.tools.AutoModel

advancePC, asmFixup, bitsToBytes, concatenate, dasm, dasm, dasmFixup, decode, defineInstructions, execute, fetch, fetch, getInstruction, getInstructions, getInstructionSizes, getPC, getSymbolNames, instrMatch, main, setPC, signExtend, signExtend, toHexString, toHexString, toLong, traceOff, traceOn

Methods inherited from class com.cmpware.cmp.Processor

branch, branchNoDelay, defineBranchDelay, defineBreakpoint, defineInstructionSize, defineName, defineNoop, defineOpcodeNames, defineRegisterNames, defineRegisters, defineSpecialRegisterNames, defineSpecialRegisters, get, getBreakpoint, getBreakpointData, getBreakpoints, getCycleCount, getDebugRegisters, getElf, getIdlePower, getInstructionMix, getInstructionSize, getName, getNoop, getOpcodeNames, getRegister, getRegisterNames, getRegisters, getRunningPower, getSpecialRegister, getSpecialRegisterNames, getSpecialRegisters, getStallCount, isBreakpoint, isStalled, load, postLoad, removeAllBreakpoints, removeBreakpoint, setBreakpoint, setIdlePower, setRegister, setRunningPower, setSpecialRegister, stall, statistics, step

Methods inherited from class com.cmpware.cmp.Memory

addInput, addMemory, addOutput, getEndian, getLocalMemory, getMemoryManager, getMmio, getProfile, hexDump, hexDump, isReadable, isValidAddress, isWriteable, profile, read, read, read16, read24, read32, read64, removeMemory, resize, setEndian, size, toInt, toShort, write, write, write16, write24, write32, write64

Methods inherited from class java.lang.Object

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

Field Detail

rs

protected int rs

The value in the 's' register

rd

protected int rd

The value in the 'd' register

rt

protected int rt

The value in the 't' register

sa

protected int sa

The value in the 'sa' value

imm16

protected int imm16

The zero-extended 16-bit immediate data

simm16

protected int simm16

The sign-extended 16-bit immediate data

instrIndex

protected int instrIndex

The lower 28-bits of jump target address (shifted right 2)

op

protected static final AutoModel.Field op

f_sa

protected static final AutoModel.Field f_sa

f_rd

protected static final AutoModel.Field f_rd

f_rt

protected static final AutoModel.Field f_rt

f_rs

protected static final AutoModel.Field f_rs

f_imm16

protected static final AutoModel.Field f_imm16

op2

protected static final AutoModel.Field op2

f_imm26

protected static final AutoModel.Field f_imm26

regToReg

protected static final AutoModel.Format regToReg

regToReg2

protected static final AutoModel.Format regToReg2

immediate

protected static final AutoModel.Format immediate

jump

protected static final AutoModel.Format jump

Constructor Detail

MIPS32

public MIPS32()

The constructor

Method Detail

main

public static void main(java.lang.String[] args)

This enables the stand-alone assembler and disassembler. The command line should be either: java MIPS32 -dasm or java MIPS32 -asm

Parameters:

args - the command line arguments.

reset

public void reset()

This method resets the processor. Note that super.reset() must me called to completely intialize the processor.

Overrides:

reset in class Processor

preExecute

public void preExecute(int instr)

Description copied from class: AutoModel

This method is called immediately before execution and may be overloaded to do things like save instruction field values to locals.

Overrides:

preExecute in class AutoModel

Parameters:

instr - The instruction

postExecute

public void postExecute(int instr)

Description copied from class: AutoModel

This method is called immediately after execution and may be overloaded to do things like save instruction field values to locals.

Overrides:

postExecute in class AutoModel

Parameters:

instr - The instruction

isAddOverflow

protected static boolean isAddOverflow(int result,
                                       int src1,
                                       int src2)

This method is used to determine if an add overflow has occurred. This is done by checking the signs of the source operands against the sign of the result.

Parameters:

result - The result of the operation on the src1 and src2 parameters.

src1 - The first source operand.

src2 - The second source operand.

Returns:

This method returns a true if an overflow was detected and false otherwise.

isSubOverflow

protected static boolean isSubOverflow(int src1,
                                       int src2,
                                       int result)

This method is used to determine if a sub overflow has occurred. This is done by checking the signs of the source operands against the sign of the result.

Parameters:

src1 - The first source operand.

src2 - The second source operand.

result - The result of the operation on the src1 and src2 parameters.

Returns:

This method returns a true if an overflow was detected and a false otherwise.

addCarry

protected static int addCarry(int src1,
                              int src2,
                              int result)

This method is used to determine if an add carry has occurred. This is done by checking the signs of the source operands against the sign of the result.

Parameters:

src1 - The first source operand.

src2 - The second source operand.

result - The result of the operation on the src1 and src2 parameters.

Returns:

This method returns a one if a carry was detected and a zero otherwise.

subCarry

protected static int subCarry(int src1,
                              int src2,
                              int result)

This method is used to determine if a sub carry has occurred. This is done by checking the signs of the source operands against the sign of the result.

Parameters:

src1 - The first source operand.

src2 - The second source operand.

result - The result of the operation on the src1 and src2 parameters.

Returns:

This method returns a one if a carry was detected and a zero otherwise.

sign

protected static int sign(int a)

This method returns the sign bit for 32 bit value.

Parameters:

a - The 32 bit value.

Returns:

This method returns the sign bit for 32 bit value.

simple

protected static AutoModel.Decode simple(int a)

This is a helper function used in decoding simple instructions. It mostly makes the Instruction table easier to read.

Parameters:

a - The code for the op field.

Returns:

This method returns a decode array for a simple instruction.

special

protected static AutoModel.Decode special(int a)

This is just a simple helper function used in decoding 'Special' instructions. It mostly just makes the Instruction table easier to read.

Parameters:

a - The code for the op2 field.

Returns:

This method returns a decode array for a 'Special' instruction.

special2

protected static AutoModel.Decode special2(int a)

This is just a simple helper function used in decoding 'Special2' instructions. It mostly just makes the Instruction table easier to read.

Parameters:

a - The code for the op2 field.

Returns:

This method returns a decode array for a 'Special' instruction.

regimm

protected static AutoModel.Decode regimm(int a)

This is just a simple helper function used in decoding 'Regimm' instructions. It mostly just makes the Instruction table easier to read.

Parameters:

a - The code for the rt field.

Returns:

This method returns a decode array for a 'Special' instruction.