HashExpr::XorHash Class Reference

XOR hashing algorithm implemented on the hashing matrix. More...

Inheritance diagram for HashExpr::XorHash:

Public Member Functions
	XorHash (int lineno, int bit_width_)
void	build_algorithm () override
bool	check_ixbar (InputXbar *ix, InputXbar::HashTable hash_table) override
void	gen_ixbar_inputs (std::vector< ixbar_input_t > &inputs, InputXbar *ix, InputXbar::HashTable hash_table) override
void	get_sources (int, std::vector< Phv::Ref > &rv) const override
int	input_size () override
XorHash &	operator= (XorHash &&)=delete
bool	operator== (const HashExpr &a_) const override
int	width () override
Public Member Functions inherited from HashExpr
virtual void	dbprint (std::ostream &out) const
void	find_input (Phv::Ref what, std::vector< ixbar_input_t > &inputs, InputXbar *ix, InputXbar::HashTable hash_table)
virtual void	gen_data (bitvec &data, int bit, InputXbar *ix, InputXbar::HashTable hash_table)
void	gen_ixbar_init (ixbar_init_t *ixbar_init, std::vector< ixbar_input_t > &inputs, std::vector< hash_matrix_output_t > &outputs, int logical_hash_bit, InputXbar *ix, InputXbar::HashTable hash_table)
virtual Phv::Ref *	get_ghost_slice ()
std::vector< Phv::Ref >	get_sources (int bit) const
virtual bool	match_phvref (const Phv::Ref &ref)
bool	operator!= (const HashExpr &a) const
Public Member Functions inherited from P4::IHasDbPrint
void	print () const

Friends
class	HashExpr

Additional Inherited Members
Static Public Member Functions inherited from HashExpr
static HashExpr *	create (gress_t, int stage, const value_t &)
Public Attributes inherited from HashExpr
bfn_hash_algorithm_t	hash_algorithm = {}
int	lineno
Protected Member Functions inherited from HashExpr
	HashExpr (int l)

Detailed Description

XOR hashing algorithm implemented on the hashing matrix.

This expression implements XOR over the hasing matrix. The input message is handled as a big integer number - the highest bit is the begining, the zero-th bit is the end. The message is split from the begining into blocks of length bit_width and these blocks are bitwise XORed together.

Member Function Documentation

build_algorithm()

void HashExpr::XorHash::build_algorithm ( )

overridevirtual

Implements HashExpr.

check_ixbar()

bool HashExpr::XorHash::check_ixbar ( InputXbar * ix, InputXbar::HashTable hash_table )

overridevirtual

Implements HashExpr.

gen_ixbar_inputs()

void HashExpr::XorHash::gen_ixbar_inputs ( std::vector< ixbar_input_t > & inputs, InputXbar * ix, InputXbar::HashTable hash_table )

overridevirtual

Implements HashExpr.

get_sources()

void HashExpr::XorHash::get_sources ( int , std::vector< Phv::Ref > & rv ) const

overridevirtual

Implements HashExpr.

input_size()

int HashExpr::XorHash::input_size ( )

overridevirtual

Implements HashExpr.

operator==()

bool HashExpr::XorHash::operator== ( const HashExpr & a_ ) const

overridevirtual

Implements HashExpr.

width()

int HashExpr::XorHash::width ( )

overridevirtual

Implements HashExpr.