Describes (part of) a physical CPU register. More...

#include <Cxx_Grammar.h>

Public Member Functions
	RegisterDescriptor ()

	RegisterDescriptor (unsigned majr, unsigned minr, unsigned offset, unsigned nbits)

unsigned	get_major () const

bool	is_valid () const

RegisterDescriptor &	set_major (unsigned majr)

unsigned	get_minor () const

RegisterDescriptor &	set_minor (unsigned minr)

unsigned	get_offset () const

RegisterDescriptor &	set_offset (unsigned offset)

unsigned	get_nbits () const

RegisterDescriptor &	set_nbits (unsigned nbits)

bool	operator< (const RegisterDescriptor &other) const

bool	operator== (const RegisterDescriptor &other) const

bool	operator!= (const RegisterDescriptor &other) const

void	print (std::ostream &o) const

Private Attributes
unsigned	majr

unsigned	minr
	Major type of register, such as integer, floating point, flag, etc. More...

unsigned	offset
	Register number within major division. More...

unsigned	nbits
	Low-bit offset within the physical register. More...

Friends
std::ostream &	operator<< (std::ostream &, const RegisterDescriptor &)

Detailed Description

Describes (part of) a physical CPU register.

Some architectures have multiple names for physical registers. For example, a amd64 has a 64-bit integer register, parts of which are referred to as "rax", "eax", "ax", "al", and "ah". The purpose of a RegisterDescriptor is to describe what physical register (major and minor) is being referenced, and the part (offset and nbits) that's being referenced.

The reason for having a major and minor number to specify a register is to allow for different types of registers. For instance, an i686 has a set of 64-bit integer registers and a set of 80-bit floating point registers (among others). Having major and minor numbers allows the physical register set (such as defined by an instruction semantics policy) to be implemented as an array of 64-bit integers and an array of 80-bit floating points (among others). The array is selected by the major number while the element of the array is selected by the minor number.

The RegisterDescriptor type is part of a SgAsmRegisterReferenceExpression and also appears in the register dictionaries (RegisterDictionary) used in various places including the disassembler.

Definition at line 6419 of file Cxx_Grammar.h.

Constructor & Destructor Documentation

RegisterDescriptor::RegisterDescriptor ( )

inline

Definition at line 6421 of file Cxx_Grammar.h.

RegisterDescriptor::RegisterDescriptor	(	unsigned	majr,
		unsigned	minr,
		unsigned	offset,
		unsigned	nbits
	)

inline

Definition at line 6423 of file Cxx_Grammar.h.

Member Function Documentation

unsigned RegisterDescriptor::get_major ( ) const

inline

Definition at line 6425 of file Cxx_Grammar.h.

References majr.

Referenced by RegisterDictionary::filter_nonoverlapping(), Partitioner::get_indirection_addr(), RegisterDictionary::hash(), SgAsmMipsInstruction::is_function_return(), modifies_ip(), RegisterNames::operator()(), and Partitioner::pattern1().

bool RegisterDescriptor::is_valid ( ) const

inline

Definition at line 6428 of file Cxx_Grammar.h.

References nbits.

RegisterDescriptor& RegisterDescriptor::set_major ( unsigned majr)

inline

Definition at line 6431 of file Cxx_Grammar.h.

References majr.

unsigned RegisterDescriptor::get_minor ( ) const

inline

Definition at line 6435 of file Cxx_Grammar.h.

References minr.

Referenced by RegisterDictionary::filter_nonoverlapping(), RegisterDictionary::hash(), SgAsmMipsInstruction::is_function_return(), modifies_ip(), RegisterNames::operator()(), and Partitioner::pattern1().

RegisterDescriptor& RegisterDescriptor::set_minor ( unsigned minr)

inline

Definition at line 6438 of file Cxx_Grammar.h.

References minr.

unsigned RegisterDescriptor::get_offset ( ) const

inline

Definition at line 6442 of file Cxx_Grammar.h.

References offset.

Referenced by RegisterDictionary::filter_nonoverlapping(), RegisterDictionary::hash(), and RegisterNames::operator()().

RegisterDescriptor& RegisterDescriptor::set_offset ( unsigned offset)

inline

Definition at line 6445 of file Cxx_Grammar.h.

References offset.

unsigned RegisterDescriptor::get_nbits ( ) const

inline

Definition at line 6449 of file Cxx_Grammar.h.

References nbits.

Referenced by RegisterDictionary::filter_nonoverlapping(), RegisterDictionary::hash(), RegisterDictionary::SortBySize::operator()(), and RegisterNames::operator()().

RegisterDescriptor& RegisterDescriptor::set_nbits ( unsigned nbits)

inline

Definition at line 6452 of file Cxx_Grammar.h.

References nbits.

Referenced by RegisterDictionary::resize().

bool RegisterDescriptor::operator< ( const RegisterDescriptor & other) const

Definition at line 36 of file Registers.C.

References majr, minr, nbits, and offset.

bool RegisterDescriptor::operator== ( const RegisterDescriptor & other) const

Definition at line 24 of file Registers.C.

References majr, minr, nbits, and offset.

bool RegisterDescriptor::operator!= ( const RegisterDescriptor & other) const

Definition at line 30 of file Registers.C.

void RegisterDescriptor::print ( std::ostream & o) const

inline

Definition at line 6459 of file Cxx_Grammar.h.

References majr, minr, nbits, and offset.

Referenced by operator<<().

Friends And Related Function Documentation

std::ostream& operator<<	(	std::ostream &	o,
		const RegisterDescriptor &	reg
	)

friend

Definition at line 12 of file Registers.C.

Member Data Documentation

unsigned RegisterDescriptor::majr

private

Definition at line 6465 of file Cxx_Grammar.h.

Referenced by get_major(), operator<(), operator==(), print(), and set_major().

unsigned RegisterDescriptor::minr

private

Major type of register, such as integer, floating point, flag, etc.

Definition at line 6466 of file Cxx_Grammar.h.

Referenced by get_minor(), operator<(), operator==(), print(), and set_minor().

unsigned RegisterDescriptor::offset

private

Register number within major division.

Definition at line 6467 of file Cxx_Grammar.h.

Referenced by get_offset(), operator<(), operator==(), print(), and set_offset().

unsigned RegisterDescriptor::nbits

private

Low-bit offset within the physical register.

Definition at line 6468 of file Cxx_Grammar.h.

Referenced by get_nbits(), is_valid(), operator<(), operator==(), print(), and set_nbits().

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

Public Member Functions

Private Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation