RiscvISA::Decoder Class Reference

#include <decoder.hh>

Public Member Functions
	Decoder (ISA *isa=nullptr)
void	process ()
void	reset ()
bool	compressed (ExtMachInst inst)
void	moreBytes (const PCState &pc, Addr fetchPC, MachInst inst)
bool	needMoreBytes ()
bool	instReady ()
void	takeOverFrom (Decoder *old)
StaticInstPtr	decodeInst (ExtMachInst mach_inst)
StaticInstPtr	decode (ExtMachInst mach_inst, Addr addr)
	Decode a machine instruction. More...
StaticInstPtr	decode (RiscvISA::PCState &nextPC)

Protected Attributes
ExtMachInst	emi
bool	instDone

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

Detailed Description

Definition at line 45 of file decoder.hh.

Constructor & Destructor Documentation

Decoder()

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

inline

Definition at line 59 of file decoder.hh.

References reset().

Member Function Documentation

compressed()

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

inline

Definition at line 64 of file decoder.hh.

References moreBytes(), and RiscvISA::pc.

Referenced by decode(), and moreBytes().

decode() [1/2]

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

Decode a machine instruction.

Parameters

mach_inst

The binary instruction to decode.

Return values

A	pointer to the corresponding StaticInst object.

Definition at line 80 of file decoder.cc.

References decodeInst(), DPRINTF, instMap, and PowerISA::si.

Referenced by decode(), and takeOverFrom().

decode() [2/2]

StaticInstPtr RiscvISA::Decoder::decode

(

RiscvISA::PCState &

nextPC

)

Definition at line 94 of file decoder.cc.

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

decodeInst()

StaticInstPtr RiscvISA::Decoder::decodeInst

(

ExtMachInst

mach_inst

)

Referenced by decode(), and takeOverFrom().

instReady()

bool RiscvISA::Decoder::instReady ( )

inline

Definition at line 71 of file decoder.hh.

References instDone.

moreBytes()

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

Definition at line 50 of file decoder.cc.

References aligned, compressed(), DPRINTF, emi, instDone, letoh(), RiscvISA::LowerBitMask, mid, more, GenericISA::SimplePCState< MachInst >::pc(), and RiscvISA::UpperBitMask.

Referenced by compressed().

needMoreBytes()

bool RiscvISA::Decoder::needMoreBytes ( )

inline

Definition at line 70 of file decoder.hh.

References more.

process()

void RiscvISA::Decoder::process ( )

inline

Definition at line 61 of file decoder.hh.

References reset().

reset()

void RiscvISA::Decoder::reset

(

)

Definition at line 40 of file decoder.cc.

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

Referenced by Decoder(), and process().

takeOverFrom()

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

inline

Definition at line 72 of file decoder.hh.

References addr, decode(), and decodeInst().

Member Data Documentation

aligned

bool RiscvISA::Decoder::aligned

private

Definition at line 49 of file decoder.hh.

Referenced by moreBytes(), and reset().

emi

ExtMachInst RiscvISA::Decoder::emi

protected

Definition at line 55 of file decoder.hh.

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

instDone

bool RiscvISA::Decoder::instDone

protected

Definition at line 56 of file decoder.hh.

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

instMap

DecodeCache::InstMap<ExtMachInst> RiscvISA::Decoder::instMap

private

Definition at line 48 of file decoder.hh.

Referenced by decode().

mid

bool RiscvISA::Decoder::mid

private

Definition at line 50 of file decoder.hh.

Referenced by moreBytes(), and reset().

more

bool RiscvISA::Decoder::more

private

Definition at line 51 of file decoder.hh.

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

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

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