#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 62 of file decode.hh.

Constructor & Destructor Documentation

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 48 of file decode.cc.

References fatal, inputBuffer, and outputWidth.

Member Function Documentation

void Minor::Decode::evaluate ( )

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

Definition at line 124 of file decode.cc.

References ActivityRecorder::activateStage(), ActivityRecorder::activity(), MinorCPU::activityRecorder, StaticInst::advancePC(), 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, out, outputWidth, popInput(), processMoreThanOneInput, Minor::ForwardInstData::resize(), Minor::ForwardInstData::threadId, and Minor::ForwardInstData::width().

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

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 82 of file decode.cc.

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

Referenced by evaluate(), and getScheduledThread().

ThreadID Minor::Decode::getScheduledThread ( )

inlineprotected

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

Definition at line 297 of file decode.cc.

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

Referenced by evaluate().

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 327 of file decode.cc.

References inp, and inputBuffer.

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

void Minor::Decode::minorTrace ( ) const

Definition at line 338 of file decode.cc.

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

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

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

protected

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

Definition at line 95 of file decode.cc.

References decodeInfo, and inputBuffer.