#include <decode.hh>

Inheritance diagram for Minor::Decode:

Classes
struct	DecodeThreadInfo
	Data members after this line are cycle-to-cycle state. More...

Public Member Functions
	Decode (const std::string &name, MinorCPU &cpu_, MinorCPUParams &params, Latch< ForwardInstData >::Output inp_, Latch< ForwardInstData >::Input out_, std::vector< InputBuffer< ForwardInstData >> &next_stage_input_buffer)

void	evaluate ()
	Pass on input/buffer data to the output if you can. More...

void	minorTrace () const

bool	isDrained ()
	Is this stage drained? For Decoed, draining is initiated by Execute halting Fetch1 causing Fetch2 to naturally drain into Decode and on to Execute which is responsible for actually killing instructions. More...

Public Member Functions inherited from Named
	Named (const std::string &name_)

const std::string &	name () const

Public Attributes
std::vector< InputBuffer< ForwardInstData > >	inputBuffer

Protected Member Functions
const ForwardInstData *	getInput (ThreadID tid)
	Get a piece of data to work on, or 0 if there is no data. More...

void	popInput (ThreadID tid)
	Pop an element off the input buffer, if there are any. More...

ThreadID	getScheduledThread ()
	Use the current threading policy to determine the next thread to decode from. More...

Protected Attributes
MinorCPU &	cpu
	Pointer back to the containing CPU. More...

Latch< ForwardInstData >::Output	inp
	Input port carrying macro instructions from Fetch2. More...

Latch< ForwardInstData >::Input	out
	Output port carrying micro-op decomposed instructions to Execute. More...

std::vector< InputBuffer< ForwardInstData > > &	nextStageReserve
	Interface to reserve space in the next stage. More...

unsigned int	outputWidth
	Width of output of this stage/input of next in instructions. More...

bool	processMoreThanOneInput
	If true, more than one input word can be processed each cycle if there is room in the output to contain its processed data. More...

std::vector< DecodeThreadInfo >	decodeInfo

ThreadID	threadPriority

Protected Attributes inherited from Named
const std::string	_name

Detailed Description

Definition at line 60 of file decode.hh.

Constructor & Destructor Documentation

◆ Decode()

Minor::Decode::Decode	(	const std::string &	name,
		MinorCPU &	cpu_,
		MinorCPUParams &	params,
		Latch< ForwardInstData >::Output	inp_,
		Latch< ForwardInstData >::Input	out_,
		std::vector< InputBuffer< ForwardInstData >> &	next_stage_input_buffer
	)

Definition at line 46 of file decode.cc.

References fatal, inputBuffer, Named::name(), outputWidth, and sc_dt::to_string().

Member Function Documentation

◆ evaluate()

void Minor::Decode::evaluate ( )

Pass on input/buffer data to the output if you can.

Definition at line 122 of file decode.cc.

References ActivityRecorder::activateStage(), ActivityRecorder::activity(), MinorCPU::activityRecorder, StaticInst::advancePC(), cpu, decodeInfo, Minor::Pipeline::DecodeStageId, DPRINTF, Minor::Decode::DecodeThreadInfo::execSeqNum, StaticInst::fetchMicroop(), getInput(), getScheduledThread(), ArmISA::i, Minor::Decode::DecodeThreadInfo::inMacroop, inp, inputBuffer, Minor::Decode::DecodeThreadInfo::inputIndex, Minor::ForwardInstData::insts, InvalidThreadID, Minor::ForwardInstData::isBubble(), StaticInst::isLastMicroop(), StaticInst::isMacroop(), Minor::Decode::DecodeThreadInfo::microopPC, nextStageReserve, NoFault, BaseCPU::numThreads, out, outputWidth, popInput(), processMoreThanOneInput, Minor::ForwardInstData::resize(), Minor::ForwardInstData::threadId, and Minor::ForwardInstData::width().

Referenced by Minor::Pipeline::evaluate().

◆ getInput()

const ForwardInstData * Minor::Decode::getInput ( ThreadID tid )

protected

Get a piece of data to work on, or 0 if there is no data.

Definition at line 80 of file decode.cc.

References inputBuffer, and Minor::ForwardInstData::isBubble().

Referenced by evaluate(), and getScheduledThread().

◆ getScheduledThread()

ThreadID Minor::Decode::getScheduledThread ( )

inlineprotected

Use the current threading policy to determine the next thread to decode from.

Definition at line 295 of file decode.cc.

References cpu, decodeInfo, getInput(), InvalidThreadID, panic, MinorCPU::randomPriority(), MinorCPU::roundRobinPriority(), MinorCPU::threadPolicy, and threadPriority.

Referenced by evaluate().

◆ isDrained()

bool Minor::Decode::isDrained ( )

Is this stage drained? For Decoed, draining is initiated by Execute halting Fetch1 causing Fetch2 to naturally drain into Decode and on to Execute which is responsible for actually killing instructions.

Definition at line 325 of file decode.cc.

References inp, and inputBuffer.

Referenced by Minor::Pipeline::isDrained().

◆ minorTrace()

void Minor::Decode::minorTrace ( ) const

Definition at line 336 of file decode.cc.

References data, decodeInfo, inputBuffer, MINORTRACE, and out.

Referenced by Minor::Pipeline::minorTrace().

◆ popInput()

void Minor::Decode::popInput ( ThreadID tid )

protected

Pop an element off the input buffer, if there are any.

Definition at line 93 of file decode.cc.

References decodeInfo, and inputBuffer.

Referenced by evaluate().

Member Data Documentation

◆ cpu

MinorCPU& Minor::Decode::cpu

protected

Pointer back to the containing CPU.

Definition at line 64 of file decode.hh.

Referenced by evaluate(), and getScheduledThread().

◆ decodeInfo

std::vector<DecodeThreadInfo> Minor::Decode::decodeInfo

protected

Definition at line 125 of file decode.hh.

Referenced by evaluate(), getScheduledThread(), minorTrace(), and popInput().

◆ inp

Latch<ForwardInstData>::Output Minor::Decode::inp

protected

Input port carrying macro instructions from Fetch2.

Definition at line 67 of file decode.hh.

Referenced by evaluate(), and isDrained().

◆ inputBuffer

std::vector<InputBuffer<ForwardInstData> > Minor::Decode::inputBuffer

Definition at line 83 of file decode.hh.

Referenced by Decode(), evaluate(), getInput(), isDrained(), minorTrace(), and popInput().

◆ nextStageReserve

std::vector<InputBuffer<ForwardInstData> >& Minor::Decode::nextStageReserve

protected

Interface to reserve space in the next stage.

Definition at line 72 of file decode.hh.

Referenced by evaluate().

◆ out

Latch<ForwardInstData>::Input Minor::Decode::out

protected

Output port carrying micro-op decomposed instructions to Execute.

Definition at line 69 of file decode.hh.

Referenced by evaluate(), and minorTrace().

◆ outputWidth

unsigned int Minor::Decode::outputWidth

protected

Width of output of this stage/input of next in instructions.

Definition at line 75 of file decode.hh.

Referenced by Decode(), and evaluate().

◆ processMoreThanOneInput

bool Minor::Decode::processMoreThanOneInput

protected

If true, more than one input word can be processed each cycle if there is room in the output to contain its processed data.

Definition at line 79 of file decode.hh.

Referenced by evaluate().

◆ threadPriority

ThreadID Minor::Decode::threadPriority

protected

Definition at line 126 of file decode.hh.

Referenced by getScheduledThread().

The documentation for this class was generated from the following files:

cpu/minor/decode.hh
cpu/minor/decode.cc

Classes

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Decode()

Member Function Documentation

◆ evaluate()

◆ getInput()

◆ getScheduledThread()

◆ isDrained()

◆ minorTrace()

◆ popInput()

Member Data Documentation

◆ cpu

◆ decodeInfo

◆ inp

◆ inputBuffer

◆ nextStageReserve

◆ out

◆ outputWidth

◆ processMoreThanOneInput

◆ threadPriority