gem5::RiscvISA::Decoder Class Reference

#include <decoder.hh>

Inheritance diagram for gem5::RiscvISA::Decoder:

Public Member Functions
	Decoder (ISA *isa=nullptr)
void	process ()
void	reset ()
bool	compressed (ExtMachInst inst)
void	moreBytes (const PCState &pc, Addr fetchPC)
bool	needMoreBytes ()
bool	instReady ()
void	takeOverFrom (Decoder *old)
StaticInstPtr	decode (RiscvISA::PCState &nextPC)
Public Member Functions inherited from gem5::InstDecoder
template<typename MoreBytesType >
	InstDecoder (MoreBytesType *mb_buf)
virtual StaticInstPtr	fetchRomMicroop (MicroPC micropc, StaticInstPtr curMacroop)
void *	moreBytesPtr () const
size_t	moreBytesSize () const
Addr	pcMask () const

Protected Member Functions
StaticInstPtr	decodeInst (ExtMachInst mach_inst)
StaticInstPtr	decode (ExtMachInst mach_inst, Addr addr)
	Decode a machine instruction. More...

Protected Attributes
ExtMachInst	emi
uint32_t	machInst
bool	instDone
Protected Attributes inherited from gem5::InstDecoder
void *	_moreBytesPtr
size_t	_moreBytesSize
Addr	_pcMask

Private Attributes
decode_cache::InstMap< ExtMachInst >	instMap
bool	aligned
bool	mid
bool	more

Detailed Description

Definition at line 48 of file decoder.hh.

Constructor & Destructor Documentation

Decoder()

gem5::RiscvISA::Decoder::Decoder ( ISA *  isa = nullptr )

inline

Definition at line 70 of file decoder.hh.

References reset().

Member Function Documentation

compressed()

bool gem5::RiscvISA::Decoder::compressed ( ExtMachInst  inst )

inline

Definition at line 75 of file decoder.hh.

Referenced by decode(), and moreBytes().

decode() [1/2]

StaticInstPtr gem5::RiscvISA::Decoder::decode ( ExtMachInst  mach_inst, Addr  addr  )

protected

Decode a machine instruction.

Parameters

mach_inst

The binary instruction to decode.

Return values

A	pointer to the corresponding StaticInst object.

Definition at line 85 of file decoder.cc.

References gem5::X86ISA::addr, decodeInst(), DPRINTF, instMap, and gem5::ArmISA::si.

Referenced by decode().

decode() [2/2]

StaticInstPtr gem5::RiscvISA::Decoder::decode

(

RiscvISA::PCState &

nextPC

)

Definition at line 100 of file decoder.cc.

References compressed(), decode(), emi, gem5::GenericISA::PCStateBase::instAddr(), instDone, machInst, and gem5::GenericISA::SimplePCState< InstWidth >::npc().

decodeInst()

StaticInstPtr gem5::RiscvISA::Decoder::decodeInst ( ExtMachInst  mach_inst )

protected

Referenced by decode().

instReady()

bool gem5::RiscvISA::Decoder::instReady ( )

inline

Definition at line 82 of file decoder.hh.

References instDone.

moreBytes()

void gem5::RiscvISA::Decoder::moreBytes	(	const PCState &	pc,
		Addr	fetchPC
	)

Definition at line 51 of file decoder.cc.

References aligned, gem5::bits(), compressed(), DPRINTF, emi, instDone, gem5::letoh(), machInst, mid, more, gem5::RiscvISA::pc, and gem5::replaceBits().

needMoreBytes()

bool gem5::RiscvISA::Decoder::needMoreBytes ( )

inline

Definition at line 81 of file decoder.hh.

References more.

process()

void gem5::RiscvISA::Decoder::process ( )

inline

Definition at line 72 of file decoder.hh.

reset()

void gem5::RiscvISA::Decoder::reset

(

)

Definition at line 41 of file decoder.cc.

References aligned, emi, instDone, mid, and more.

Referenced by Decoder().

takeOverFrom()

void gem5::RiscvISA::Decoder::takeOverFrom ( Decoder *  old )

inline

Definition at line 83 of file decoder.hh.

Member Data Documentation

aligned

bool gem5::RiscvISA::Decoder::aligned

private

Definition at line 52 of file decoder.hh.

Referenced by moreBytes(), and reset().

emi

ExtMachInst gem5::RiscvISA::Decoder::emi

protected

Definition at line 58 of file decoder.hh.

Referenced by decode(), moreBytes(), and reset().

instDone

bool gem5::RiscvISA::Decoder::instDone

protected

Definition at line 60 of file decoder.hh.

Referenced by decode(), instReady(), moreBytes(), and reset().

instMap

decode_cache::InstMap<ExtMachInst> gem5::RiscvISA::Decoder::instMap

private

Definition at line 51 of file decoder.hh.

Referenced by decode().

machInst

uint32_t gem5::RiscvISA::Decoder::machInst

protected

Definition at line 59 of file decoder.hh.

Referenced by decode(), and moreBytes().

mid

bool gem5::RiscvISA::Decoder::mid

private

Definition at line 53 of file decoder.hh.

Referenced by moreBytes(), and reset().

more

bool gem5::RiscvISA::Decoder::more

private

Definition at line 54 of file decoder.hh.

Referenced by moreBytes(), needMoreBytes(), and reset().

---

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

• arch/riscv/decoder.hh
• arch/riscv/decoder.cc