mips

package module
v0.0.0-...-8d1ebaf Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Nov 5, 2015 License: ISC Imports: 10 Imported by: 0

README 

mips pipeline simulator
-----------------------
Implements a subset of the instruction set to show pipelining.

license: ISC

Features:
- Implements three branch prediction policies

Example:
$ go test -short
      I#1   I#2   I#3   I#4   I#5   I#6   
      c#1   IF1   .     .     .     .     .     
      c#2   IF2   IF1   .     .     .     .     
      c#3   IF3   IF2   .     .     .     .     
      c#4   ID    IF3   IF1   .     .     .     
      c#5   EX    ID    IF2   IF1   .     .     
      c#6   MEM1  EX    IF3   IF2   .     .     
      c#7   MEM2  MEM1  ID    IF3   IF1   .     
      c#8   MEM3  MEM2  EX    ID    (fl)  .     
      c#9   WB    MEM3  MEM1  EX          IF1   
      c#10        WB    MEM2  MEM1        IF2   
      c#11              MEM3  MEM2        IF3   
      c#12              WB    MEM3        ID    
      c#13                    WB          EX    
      c#14                                MEM1  
      c#15                                MEM2  
      c#16                                MEM3  
      c#17                                WB    

      PASS
      ok	github.com/tmc/mips0.042s

Documentation

Overview

Package mips is a simple simulator of a subset of the MIPS instruction set to show pipelining

Parses input files for simple mips pipeline simulator

Index

Constants

View Source 
const (
	BranchPolicyFlush = iota // no prediction, flush pipeline
	BranchPolicyPredictTaken
	BranchPolicyPredictNotTaken
)
View Source 
const (
	None = -1 + iota
	R0
	R1
	R2
	R3
	R4
	R5
	R6
	R7
	R8
	R9
	R10
	R11
	R12
	R13
	R14
	R15
	R16
	R17
	R18
	R19
	R20
	R21
	R22
	R23
	R24
	R25
	R26
	R27
	R28
	R29
	R30
	R31
)
View Source 
const DEBUG = 2
View Source 
const ERROR = 0
View Source 
const WARN = 1

Variables

View Source 
var (
	CPUFinished          = errors.New("CPU Finished.")
	MaximumCyclesReached = errors.New("Maximum Cycles Reached.")
)
View Source 
var (
	RAWHazard       = errors.New("RAW Hazard")
	Stall           = errors.New("Stall")
	FlushPipeline   = errors.New("Pipeline should flush")
	BranchResolving = errors.New("Branch is resolving")
)
View Source 
var (
	InvalidSet        = errors.New("Invalid Register Set")
	RegisterLocked    = errors.New("Register Locked")
	RegisterNotLocked = errors.New("Register Not Locked")
)
View Source 
var (
	PipelineStall = errors.New("Pipeline Stalled")
)

Functions

This section is empty.

Types

type ALUInstruction 

type ALUInstruction struct {
	// contains filtered or unexported fields
}

func (*ALUInstruction) AcquireDestintion 

func (i *ALUInstruction) AcquireDestintion()

func (*ALUInstruction) Destination 

func (i *ALUInstruction) Destination() Operand

func (*ALUInstruction) EX 

func (i *ALUInstruction) EX() error

func (*ALUInstruction) Flush 

func (i *ALUInstruction) Flush()

func (*ALUInstruction) ID 

func (i *ALUInstruction) ID() error

func (*ALUInstruction) IF1 

func (i *ALUInstruction) IF1() error

func (*ALUInstruction) IF2 

func (i *ALUInstruction) IF2() error

func (*ALUInstruction) IF3 

func (i *ALUInstruction) IF3() error

func (*ALUInstruction) Label 

func (i *ALUInstruction) Label() Label

func (*ALUInstruction) MEM1 

func (i *ALUInstruction) MEM1() error

func (*ALUInstruction) MEM2 

func (i *ALUInstruction) MEM2() error

func (*ALUInstruction) MEM3 

func (i *ALUInstruction) MEM3() error

func (ALUInstruction) OpCode 

func (i ALUInstruction) OpCode() string

func (*ALUInstruction) OperandA 

func (i *ALUInstruction) OperandA() Operand

func (*ALUInstruction) OperandB 

func (i *ALUInstruction) OperandB() Operand

func (*ALUInstruction) ReleaseDestintion 

func (i *ALUInstruction) ReleaseDestintion()

func (*ALUInstruction) SetCPU 

func (i *ALUInstruction) SetCPU(cpu *CPU)

func (*ALUInstruction) SetDestination 

func (i *ALUInstruction) SetDestination(d Operand)

func (*ALUInstruction) SetLabel 

func (i *ALUInstruction) SetLabel(label Label)

func (*ALUInstruction) SetOpCode 

func (i *ALUInstruction) SetOpCode(opcode string)

func (*ALUInstruction) SetOperandA 

func (i *ALUInstruction) SetOperandA(o Operand)

func (*ALUInstruction) SetOperandB 

func (i *ALUInstruction) SetOperandB(o Operand)

func (*ALUInstruction) SetText 

func (i *ALUInstruction) SetText(text string)

func (ALUInstruction) String 

func (i ALUInstruction) String() string

func (*ALUInstruction) WB 

func (i *ALUInstruction) WB() error

type BNEZ 

type BNEZ struct {
	// contains filtered or unexported fields
}

func (*BNEZ) AcquireDestintion 

func (i *BNEZ) AcquireDestintion()

func (*BNEZ) Destination 

func (i *BNEZ) Destination() Operand

func (*BNEZ) EX 

func (i *BNEZ) EX() error

func (*BNEZ) Flush 

func (i *BNEZ) Flush()

func (*BNEZ) ID 

func (i *BNEZ) ID() (err error)

func (*BNEZ) IF1 

func (i *BNEZ) IF1() (err error)

func (*BNEZ) IF2 

func (i *BNEZ) IF2() (err error)

func (*BNEZ) IF3 

func (i *BNEZ) IF3() (err error)

func (*BNEZ) Label 

func (i *BNEZ) Label() Label

func (*BNEZ) MEM1 

func (i *BNEZ) MEM1() error

func (*BNEZ) MEM2 

func (i *BNEZ) MEM2() error

func (*BNEZ) MEM3 

func (i *BNEZ) MEM3() error

func (BNEZ) OpCode 

func (i BNEZ) OpCode() string

func (*BNEZ) OperandA 

func (i *BNEZ) OperandA() Operand

func (*BNEZ) OperandB 

func (i *BNEZ) OperandB() Operand

func (*BNEZ) ReleaseDestintion 

func (i *BNEZ) ReleaseDestintion()

func (*BNEZ) SetCPU 

func (i *BNEZ) SetCPU(cpu *CPU)

func (*BNEZ) SetDestination 

func (i *BNEZ) SetDestination(d Operand)

func (*BNEZ) SetLabel 

func (i *BNEZ) SetLabel(label Label)

func (*BNEZ) SetOpCode 

func (i *BNEZ) SetOpCode(opcode string)

func (*BNEZ) SetOperandA 

func (i *BNEZ) SetOperandA(o Operand)

func (*BNEZ) SetOperandB 

func (i *BNEZ) SetOperandB(o Operand)

func (*BNEZ) SetText 

func (i *BNEZ) SetText(text string)

func (BNEZ) String 

func (i BNEZ) String() string

func (*BNEZ) WB 

func (i *BNEZ) WB() error

type BranchPolicy 

type BranchPolicy int

Branch prediction modes

type CPU 

type CPU struct {
	Registers          *Registers
	BranchMode         BranchPolicy
	ForwardingEnabled  bool
	Cycle              int
	Ram                Memory
	InstructionCache   InstructionCache
	InstructionPointer int
	Instructions       []*ExecutedInstruction
	Labels             map[Label]int // label to Code index mapping
	Pipeline           Pipeline
}

func NewCPU 

func NewCPU() *CPU

func ParseCPU 

func ParseCPU(input io.Reader) (*CPU, error)

func ParseCPUString 

func ParseCPUString(input string) (*CPU, error)

func (*CPU) InstructionCacheEmpty 

func (cpu *CPU) InstructionCacheEmpty() bool

func (*CPU) RenderState 

func (cpu *CPU) RenderState() string

func (*CPU) RenderTiming 

func (cpu *CPU) RenderTiming() string

func (*CPU) RenderTimingForCycle 

func (cpu *CPU) RenderTimingForCycle(cycle int) string

func (*CPU) Run 

func (cpu *CPU) Run(maximumCycles int) (err error)

func (*CPU) Step 

func (cpu *CPU) Step() error

func (*CPU) String 

func (cpu *CPU) String() string

type DADD 

type DADD struct {
	ALUInstruction
}

func (*DADD) AcquireDestintion 

func (i *DADD) AcquireDestintion()

func (*DADD) Destination 

func (i *DADD) Destination() Operand

func (*DADD) EX 

func (i *DADD) EX() error

func (*DADD) Flush 

func (i *DADD) Flush()

func (*DADD) ID 

func (i *DADD) ID() (err error)

func (*DADD) IF1 

func (i *DADD) IF1() error

func (*DADD) IF2 

func (i *DADD) IF2() error

func (*DADD) IF3 

func (i *DADD) IF3() error

func (*DADD) Label 

func (i *DADD) Label() Label

func (*DADD) MEM1 

func (i *DADD) MEM1() error

func (*DADD) MEM2 

func (i *DADD) MEM2() error

func (*DADD) MEM3 

func (i *DADD) MEM3() error

func (DADD) OpCode 

func (i DADD) OpCode() string

func (*DADD) OperandA 

func (i *DADD) OperandA() Operand

func (*DADD) OperandB 

func (i *DADD) OperandB() Operand

func (*DADD) ReleaseDestintion 

func (i *DADD) ReleaseDestintion()

func (*DADD) SetCPU 

func (i *DADD) SetCPU(cpu *CPU)

func (*DADD) SetDestination 

func (i *DADD) SetDestination(d Operand)

func (*DADD) SetLabel 

func (i *DADD) SetLabel(label Label)

func (*DADD) SetOpCode 

func (i *DADD) SetOpCode(opcode string)

func (*DADD) SetOperandA 

func (i *DADD) SetOperandA(o Operand)

func (*DADD) SetOperandB 

func (i *DADD) SetOperandB(o Operand)

func (*DADD) SetText 

func (i *DADD) SetText(text string)

func (DADD) String 

func (i DADD) String() string

type DADDI 

type DADDI struct {
	ALUInstruction
}

func (*DADDI) AcquireDestintion 

func (i *DADDI) AcquireDestintion()

func (*DADDI) Destination 

func (i *DADDI) Destination() Operand

func (*DADDI) EX 

func (i *DADDI) EX() error

func (*DADDI) Flush 

func (i *DADDI) Flush()

func (*DADDI) ID 

func (i *DADDI) ID() (err error)

func (*DADDI) IF1 

func (i *DADDI) IF1() error

func (*DADDI) IF2 

func (i *DADDI) IF2() error

func (*DADDI) IF3 

func (i *DADDI) IF3() error

func (*DADDI) Label 

func (i *DADDI) Label() Label

func (*DADDI) MEM1 

func (i *DADDI) MEM1() error

func (*DADDI) MEM2 

func (i *DADDI) MEM2() error

func (*DADDI) MEM3 

func (i *DADDI) MEM3() error

func (DADDI) OpCode 

func (i DADDI) OpCode() string

func (*DADDI) OperandA 

func (i *DADDI) OperandA() Operand

func (*DADDI) OperandB 

func (i *DADDI) OperandB() Operand

func (*DADDI) ReleaseDestintion 

func (i *DADDI) ReleaseDestintion()

func (*DADDI) SetCPU 

func (i *DADDI) SetCPU(cpu *CPU)

func (*DADDI) SetDestination 

func (i *DADDI) SetDestination(d Operand)

func (*DADDI) SetLabel 

func (i *DADDI) SetLabel(label Label)

func (*DADDI) SetOpCode 

func (i *DADDI) SetOpCode(opcode string)

func (*DADDI) SetOperandA 

func (i *DADDI) SetOperandA(o Operand)

func (*DADDI) SetOperandB 

func (i *DADDI) SetOperandB(o Operand)

func (*DADDI) SetText 

func (i *DADDI) SetText(text string)

func (DADDI) String 

func (i DADDI) String() string

type EX 

type EX struct {
	// contains filtered or unexported fields
}

func (*EX) Addr 

func (s *EX) Addr() string

func (*EX) CPU 

func (s *EX) CPU() *CPU

func (*EX) GetInstruction 

func (s *EX) GetInstruction() *ExecutedInstruction

func (*EX) Initialize 

func (s *EX) Initialize(cpu *CPU)

func (*EX) Next 

func (s *EX) Next() PipelineStage

func (*EX) Prev 

func (s *EX) Prev() PipelineStage

func (*EX) SetInstruction 

func (s *EX) SetInstruction(instruction *ExecutedInstruction)

func (*EX) SetNext 

func (s *EX) SetNext(p PipelineStage)

func (*EX) SetPrev 

func (s *EX) SetPrev(p PipelineStage)

func (*EX) Stall 

func (s *EX) Stall()

func (*EX) Stalled 

func (s *EX) Stalled() bool

func (*EX) Step 

func (s *EX) Step() error

func (EX) String 

func (s EX) String() string

func (*EX) Unstall 

func (s *EX) Unstall()

type ExecutedInstruction 

type ExecutedInstruction struct {
	Instruction
	Stage       PipelineStage
	Stages      map[string]int // map of Stages to cycle at which that stage was entered
	Cycles      map[int]string // map of cycles to Stages
	CycleStart  int
	CycleFinish int
	CycleFlush  int
}

type ID 

type ID struct {
	// contains filtered or unexported fields
}

func (*ID) Addr 

func (s *ID) Addr() string

func (*ID) CPU 

func (s *ID) CPU() *CPU

func (*ID) GetInstruction 

func (s *ID) GetInstruction() *ExecutedInstruction

func (*ID) Initialize 

func (s *ID) Initialize(cpu *CPU)

func (*ID) Next 

func (s *ID) Next() PipelineStage

func (*ID) Prev 

func (s *ID) Prev() PipelineStage

func (*ID) SetInstruction 

func (s *ID) SetInstruction(instruction *ExecutedInstruction)

func (*ID) SetNext 

func (s *ID) SetNext(p PipelineStage)

func (*ID) SetPrev 

func (s *ID) SetPrev(p PipelineStage)

func (*ID) Stall 

func (s *ID) Stall()

func (*ID) Stalled 

func (s *ID) Stalled() bool

func (*ID) Step 

func (s *ID) Step() error

func (ID) String 

func (s ID) String() string

func (*ID) Unstall 

func (s *ID) Unstall()

type IF1 

type IF1 struct {
	// contains filtered or unexported fields
}

func (*IF1) Addr 

func (s *IF1) Addr() string

func (*IF1) CPU 

func (s *IF1) CPU() *CPU

func (*IF1) GetInstruction 

func (s *IF1) GetInstruction() *ExecutedInstruction

func (*IF1) Initialize 

func (s *IF1) Initialize(cpu *CPU)

func (*IF1) Next 

func (s *IF1) Next() PipelineStage

func (*IF1) Prev 

func (s *IF1) Prev() PipelineStage

func (*IF1) SetInstruction 

func (s *IF1) SetInstruction(instruction *ExecutedInstruction)

func (*IF1) SetNext 

func (s *IF1) SetNext(p PipelineStage)

func (*IF1) SetPrev 

func (s *IF1) SetPrev(p PipelineStage)

func (*IF1) Stall 

func (s *IF1) Stall()

func (*IF1) Stalled 

func (s *IF1) Stalled() bool

func (*IF1) Step 

func (s *IF1) Step() error

func (IF1) String 

func (s IF1) String() string

func (*IF1) Unstall 

func (s *IF1) Unstall()

type IF2 

type IF2 struct {
	// contains filtered or unexported fields
}

func (*IF2) Addr 

func (s *IF2) Addr() string

func (*IF2) CPU 

func (s *IF2) CPU() *CPU

func (*IF2) GetInstruction 

func (s *IF2) GetInstruction() *ExecutedInstruction

func (*IF2) Initialize 

func (s *IF2) Initialize(cpu *CPU)

func (*IF2) Next 

func (s *IF2) Next() PipelineStage

func (*IF2) Prev 

func (s *IF2) Prev() PipelineStage

func (*IF2) SetInstruction 

func (s *IF2) SetInstruction(instruction *ExecutedInstruction)

func (*IF2) SetNext 

func (s *IF2) SetNext(p PipelineStage)

func (*IF2) SetPrev 

func (s *IF2) SetPrev(p PipelineStage)

func (*IF2) Stall 

func (s *IF2) Stall()

func (*IF2) Stalled 

func (s *IF2) Stalled() bool

func (*IF2) Step 

func (s *IF2) Step() error

func (IF2) String 

func (s IF2) String() string

func (*IF2) Unstall 

func (s *IF2) Unstall()

type IF3 

type IF3 struct {
	// contains filtered or unexported fields
}

func (*IF3) Addr 

func (s *IF3) Addr() string

func (*IF3) CPU 

func (s *IF3) CPU() *CPU

func (*IF3) GetInstruction 

func (s *IF3) GetInstruction() *ExecutedInstruction

func (*IF3) Initialize 

func (s *IF3) Initialize(cpu *CPU)

func (*IF3) Next 

func (s *IF3) Next() PipelineStage

func (*IF3) Prev 

func (s *IF3) Prev() PipelineStage

func (*IF3) SetInstruction 

func (s *IF3) SetInstruction(instruction *ExecutedInstruction)

func (*IF3) SetNext 

func (s *IF3) SetNext(p PipelineStage)

func (*IF3) SetPrev 

func (s *IF3) SetPrev(p PipelineStage)

func (*IF3) Stall 

func (s *IF3) Stall()

func (*IF3) Stalled 

func (s *IF3) Stalled() bool

func (*IF3) Step 

func (s *IF3) Step() error

func (IF3) String 

func (s IF3) String() string

func (*IF3) Unstall 

func (s *IF3) Unstall()

type Instruction 

type Instruction interface {
	SetCPU(cpu *CPU)
	OpCode() string
	SetOpCode(opcode string)
	String() string
	Label() Label
	SetLabel(label Label)
	SetText(text string)
	Destination() Operand
	SetDestination(o Operand)
	OperandA() Operand
	SetOperandA(o Operand)
	OperandB() Operand
	SetOperandB(o Operand)
	Flush()

	IF1() error
	IF2() error
	IF3() error
	ID() error
	EX() error
	MEM1() error
	MEM2() error
	MEM3() error
	WB() error
}

func NewInstruction 

func NewInstruction(opcode string) (i Instruction, err error)

func ParseInstruction 

func ParseInstruction(input io.Reader) (Instruction, error)

type InstructionCache 

type InstructionCache []Instruction

func (InstructionCache) Equals 

func (lhs InstructionCache) Equals(rhs InstructionCache) bool

type LD 

type LD struct {
	// contains filtered or unexported fields
}

func (*LD) ID 

func (i *LD) ID() error

func (*LD) MEM3 

func (i *LD) MEM3() error

func (*LD) WB 

func (i *LD) WB() error

type Label 

type Label string

type MEM1 

type MEM1 struct {
	// contains filtered or unexported fields
}

func (*MEM1) Addr 

func (s *MEM1) Addr() string

func (*MEM1) CPU 

func (s *MEM1) CPU() *CPU

func (*MEM1) GetInstruction 

func (s *MEM1) GetInstruction() *ExecutedInstruction

func (*MEM1) Initialize 

func (s *MEM1) Initialize(cpu *CPU)

func (*MEM1) Next 

func (s *MEM1) Next() PipelineStage

func (*MEM1) Prev 

func (s *MEM1) Prev() PipelineStage

func (*MEM1) SetInstruction 

func (s *MEM1) SetInstruction(instruction *ExecutedInstruction)

func (*MEM1) SetNext 

func (s *MEM1) SetNext(p PipelineStage)

func (*MEM1) SetPrev 

func (s *MEM1) SetPrev(p PipelineStage)

func (*MEM1) Stall 

func (s *MEM1) Stall()

func (*MEM1) Stalled 

func (s *MEM1) Stalled() bool

func (*MEM1) Step 

func (s *MEM1) Step() error

func (MEM1) String 

func (s MEM1) String() string

func (*MEM1) Unstall 

func (s *MEM1) Unstall()

type MEM2 

type MEM2 struct {
	// contains filtered or unexported fields
}

func (*MEM2) Addr 

func (s *MEM2) Addr() string

func (*MEM2) CPU 

func (s *MEM2) CPU() *CPU

func (*MEM2) GetInstruction 

func (s *MEM2) GetInstruction() *ExecutedInstruction

func (*MEM2) Initialize 

func (s *MEM2) Initialize(cpu *CPU)

func (*MEM2) Next 

func (s *MEM2) Next() PipelineStage

func (*MEM2) Prev 

func (s *MEM2) Prev() PipelineStage

func (*MEM2) SetInstruction 

func (s *MEM2) SetInstruction(instruction *ExecutedInstruction)

func (*MEM2) SetNext 

func (s *MEM2) SetNext(p PipelineStage)

func (*MEM2) SetPrev 

func (s *MEM2) SetPrev(p PipelineStage)

func (*MEM2) Stall 

func (s *MEM2) Stall()

func (*MEM2) Stalled 

func (s *MEM2) Stalled() bool

func (*MEM2) Step 

func (s *MEM2) Step() error

func (MEM2) String 

func (s MEM2) String() string

func (*MEM2) Unstall 

func (s *MEM2) Unstall()

type MEM3 

type MEM3 struct {
	// contains filtered or unexported fields
}

func (*MEM3) Addr 

func (s *MEM3) Addr() string

func (*MEM3) CPU 

func (s *MEM3) CPU() *CPU

func (*MEM3) GetInstruction 

func (s *MEM3) GetInstruction() *ExecutedInstruction

func (*MEM3) Initialize 

func (s *MEM3) Initialize(cpu *CPU)

func (*MEM3) Next 

func (s *MEM3) Next() PipelineStage

func (*MEM3) Prev 

func (s *MEM3) Prev() PipelineStage

func (*MEM3) SetInstruction 

func (s *MEM3) SetInstruction(instruction *ExecutedInstruction)

func (*MEM3) SetNext 

func (s *MEM3) SetNext(p PipelineStage)

func (*MEM3) SetPrev 

func (s *MEM3) SetPrev(p PipelineStage)

func (*MEM3) Stall 

func (s *MEM3) Stall()

func (*MEM3) Stalled 

func (s *MEM3) Stalled() bool

func (*MEM3) Step 

func (s *MEM3) Step() error

func (MEM3) String 

func (s MEM3) String() string

func (*MEM3) Unstall 

func (s *MEM3) Unstall()

type Memory 

type Memory [memorySize]Word

func (Memory) String 

func (r Memory) String() string

type Operand 

type Operand struct {
	Register Register
	Offset   int
	Type     OperandType
	// contains filtered or unexported fields
}

func ParseOperand 

func ParseOperand(s string) (o Operand, err error)

func (Operand) String 

func (op Operand) String() string

func (Operand) Value 

func (op Operand) Value(cpu *CPU) (value Word, err error)

type OperandType 

type OperandType int

type Pipeline 

type Pipeline []PipelineStage

func NewPipeline 

func NewPipeline(cpu *CPU, stages ...PipelineStage) (Pipeline, error)

func (Pipeline) ActiveInstructions 

func (p Pipeline) ActiveInstructions() []*ExecutedInstruction

func (Pipeline) Empty 

func (p Pipeline) Empty() bool

func (Pipeline) Execute 

func (p Pipeline) Execute() error

Execute a cycle in the pipeline

func (Pipeline) FlushBefore 

func (p Pipeline) FlushBefore(stage PipelineStage)

func (Pipeline) GetNextStage 

func (p Pipeline) GetNextStage(s PipelineStage) PipelineStage

func (Pipeline) GetPreviousStage 

func (p Pipeline) GetPreviousStage(s PipelineStage) PipelineStage

func (Pipeline) RecordTiming 

func (p Pipeline) RecordTiming(stage PipelineStage)

func (Pipeline) Reverse 

func (p Pipeline) Reverse() []PipelineStage

func (Pipeline) StageNames 

func (p Pipeline) StageNames() (result []string)

func (Pipeline) StallBefore 

func (p Pipeline) StallBefore(stage PipelineStage)

func (Pipeline) TransferInstruction 

func (p Pipeline) TransferInstruction(fromStage PipelineStage) error

func (Pipeline) TransferInstructions 

func (p Pipeline) TransferInstructions() error

type PipelineStage 

type PipelineStage interface {
	Initialize(cpu *CPU)
	CPU() *CPU
	String() string
	Step() error
	Stall()
	Unstall()
	Stalled() bool
	SetInstruction(instruction *ExecutedInstruction)
	GetInstruction() *ExecutedInstruction
	Next() PipelineStage
	Prev() PipelineStage
	SetNext(PipelineStage)
	SetPrev(PipelineStage)
}

type Register 

type Register int

func (Register) String 

func (r Register) String() string

type Registers 

type Registers struct {
	// contains filtered or unexported fields
}

func NewRegisters 

func NewRegisters() *Registers

func (*Registers) Acquire 

func (r *Registers) Acquire(register Register)

func (*Registers) Get 

func (r *Registers) Get(register Register) Word

func (*Registers) Locked 

func (r *Registers) Locked(register Register) bool

func (*Registers) Release 

func (r *Registers) Release(register Register)

func (*Registers) Set 

func (r *Registers) Set(register Register, value Word) error

func (Registers) String 

func (r Registers) String() string

type SD 

type SD struct {
	// contains filtered or unexported fields
}

func (*SD) ID 

func (i *SD) ID() error

func (*SD) WB 

func (i *SD) WB() error

type WB 

type WB struct {
	// contains filtered or unexported fields
}

func (*WB) Addr 

func (s *WB) Addr() string

func (*WB) CPU 

func (s *WB) CPU() *CPU

func (*WB) GetInstruction 

func (s *WB) GetInstruction() *ExecutedInstruction

func (*WB) Initialize 

func (s *WB) Initialize(cpu *CPU)

func (*WB) Next 

func (s *WB) Next() PipelineStage

func (*WB) Prev 

func (s *WB) Prev() PipelineStage

func (*WB) SetInstruction 

func (s *WB) SetInstruction(instruction *ExecutedInstruction)

func (*WB) SetNext 

func (s *WB) SetNext(p PipelineStage)

func (*WB) SetPrev 

func (s *WB) SetPrev(p PipelineStage)

func (*WB) Stall 

func (s *WB) Stall()

func (*WB) Stalled 

func (s *WB) Stalled() bool

func (*WB) Step 

func (s *WB) Step() error

func (WB) String 

func (s WB) String() string

func (*WB) Unstall 

func (s *WB) Unstall()

type Word 

type Word uint64

func (Word) String 

func (w Word) String() string

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