Stores a table of elliptic curve operations represented in the Ultra format. More...

#include <ecc_ops_table.hpp>

Public Member Functions
size_t	num_ops () const

size_t	num_ultra_rows () const

size_t	current_ultra_subtable_size () const

size_t	previous_ultra_table_size () const

void	create_new_subtable (size_t size_hint=0)

void	push (const UltraOp &op)

void	merge (MergeSettings settings=MergeSettings::PREPEND, std::optional< size_t > offset=std::nullopt)

size_t	get_current_subtable_size () const

std::vector< UltraOp >	get_reconstructed () const

std::vector< UltraOp >	get_reconstructed_with_fixed_append () const

ColumnPolynomials	construct_table_columns () const

ColumnPolynomials	construct_previous_table_columns () const

ColumnPolynomials	construct_current_ultra_ops_subtable_columns () const

Static Public Attributes
static constexpr size_t	TABLE_WIDTH = 4

static constexpr size_t	NUM_ROWS_PER_OP = 2

Private Types
using	Curve = curve::BN254

using	Fr = Curve::ScalarField

using	UltraOpsTable = EccOpsTable< UltraOp >

using	ColumnPolynomials = std::array< Polynomial< Fr >, TABLE_WIDTH >

Private Member Functions
ColumnPolynomials	construct_column_polynomials_with_fixed_append (const size_t poly_size) const
	Construct polynomials with fixed-location append.

ColumnPolynomials	construct_column_polynomials_from_subtables (const size_t poly_size, const size_t subtable_start_idx, const size_t subtable_end_idx) const
	Construct polynomials corresponding to the columns of the reconstructed ultra ops table for the given range of subtables.

Static Private Member Functions
static void	write_op_to_polynomials (ColumnPolynomials &column_polynomials, const UltraOp &op, const size_t row_idx)
	Write a single UltraOp to the column polynomials at the given position.

Private Attributes
size_t	current_subtable_idx = 0

UltraOpsTable	table

std::optional< size_t >	fixed_append_offset

bool	has_fixed_append = false

Detailed Description

Stores a table of elliptic curve operations represented in the Ultra format.

An ECC operation OP involing point P(X,Y) and scalar z is represented in the Ultra format as a tuple of the form {OP, X_lo, X_hi, Y_lo, Y_hi, z1, z2}, where the coordinates are split into hi and lo limbs and z1, z2 are the endomorphism scalars associated with z. Because the Ultra/Mega arithmetization utilizes 4 wires, each op occupies two rows in a width-4 execution trace, arranged as follows:

OP | X_lo | X_hi | Y_lo 0 | Y_hi | z1 | z2

The table data is stored in the UltraOp tuple format but is converted to four columns of Fr scalars for use in the polynomials in the proving system.

Definition at line 222 of file ecc_ops_table.hpp.

Member Typedef Documentation

◆ ColumnPolynomials

using bb::UltraEccOpsTable::ColumnPolynomials = std::array<Polynomial<Fr>, TABLE_WIDTH>

private

Definition at line 231 of file ecc_ops_table.hpp.

◆ Curve

using bb::UltraEccOpsTable::Curve = curve::BN254

private

Definition at line 228 of file ecc_ops_table.hpp.

◆ Fr

using bb::UltraEccOpsTable::Fr = Curve::ScalarField

private

Definition at line 229 of file ecc_ops_table.hpp.

◆ UltraOpsTable

using bb::UltraEccOpsTable::UltraOpsTable = EccOpsTable<UltraOp>

private

Definition at line 230 of file ecc_ops_table.hpp.

Member Function Documentation

◆ construct_column_polynomials_from_subtables()

ColumnPolynomials bb::UltraEccOpsTable::construct_column_polynomials_from_subtables	(	const size_t	poly_size,
		const size_t	subtable_start_idx,
		const size_t	subtable_end_idx
	)		const

inlineprivate

Construct polynomials corresponding to the columns of the reconstructed ultra ops table for the given range of subtables.

Parameters

target_columns

Definition at line 422 of file ecc_ops_table.hpp.

◆ construct_column_polynomials_with_fixed_append()

ColumnPolynomials bb::UltraEccOpsTable::construct_column_polynomials_with_fixed_append ( const size_t poly_size ) const

inlineprivate

Construct polynomials with fixed-location append.

Process prepended subtables first, then place the appended subtable at the fixed offset

Definition at line 386 of file ecc_ops_table.hpp.

◆ construct_current_ultra_ops_subtable_columns()

ColumnPolynomials bb::UltraEccOpsTable::construct_current_ultra_ops_subtable_columns ( ) const

inline

Definition at line 353 of file ecc_ops_table.hpp.

◆ construct_previous_table_columns()

ColumnPolynomials bb::UltraEccOpsTable::construct_previous_table_columns ( ) const

inline

Definition at line 342 of file ecc_ops_table.hpp.

◆ construct_table_columns()

ColumnPolynomials bb::UltraEccOpsTable::construct_table_columns ( ) const

inline

Definition at line 326 of file ecc_ops_table.hpp.

◆ create_new_subtable()

void bb::UltraEccOpsTable::create_new_subtable ( size_t size_hint = 0 )

inline

Definition at line 264 of file ecc_ops_table.hpp.

◆ current_ultra_subtable_size()

size_t bb::UltraEccOpsTable::current_ultra_subtable_size ( ) const

inline

Definition at line 262 of file ecc_ops_table.hpp.

◆ get_current_subtable_size()

size_t bb::UltraEccOpsTable::get_current_subtable_size ( ) const

inline

Definition at line 282 of file ecc_ops_table.hpp.

◆ get_reconstructed()

std::vector< UltraOp > bb::UltraEccOpsTable::get_reconstructed ( ) const

inline

Definition at line 284 of file ecc_ops_table.hpp.

◆ get_reconstructed_with_fixed_append()

std::vector< UltraOp > bb::UltraEccOpsTable::get_reconstructed_with_fixed_append ( ) const

inline

Definition at line 291 of file ecc_ops_table.hpp.

◆ merge()

void bb::UltraEccOpsTable::merge	(	MergeSettings	settings = `MergeSettings::PREPEND`,
		std::optional< size_t >	offset = `std::nullopt`
	)

inline

Definition at line 266 of file ecc_ops_table.hpp.

◆ num_ops()

size_t bb::UltraEccOpsTable::num_ops ( ) const

inline

Definition at line 245 of file ecc_ops_table.hpp.

◆ num_ultra_rows()

size_t bb::UltraEccOpsTable::num_ultra_rows ( ) const

inline

Definition at line 248 of file ecc_ops_table.hpp.

◆ previous_ultra_table_size()

size_t bb::UltraEccOpsTable::previous_ultra_table_size ( ) const

inline

Definition at line 263 of file ecc_ops_table.hpp.

◆ push()

void bb::UltraEccOpsTable::push ( const UltraOp & op )

inline

Definition at line 265 of file ecc_ops_table.hpp.

◆ write_op_to_polynomials()

static void bb::UltraEccOpsTable::write_op_to_polynomials	(	ColumnPolynomials &	column_polynomials,
		const UltraOp &	op,
		const size_t	row_idx
	)

inlinestaticprivate

Write a single UltraOp to the column polynomials at the given position.

Each op is written across 2 rows (NUM_ROWS_PER_OP)

Parameters

column_polynomials	The column polynomials to write to
op	The operation to write
row_idx	The starting row index (will write to row_idx and row_idx+1)

Definition at line 370 of file ecc_ops_table.hpp.

Member Data Documentation

◆ current_subtable_idx

size_t bb::UltraEccOpsTable::current_subtable_idx = 0

private

Definition at line 233 of file ecc_ops_table.hpp.

◆ fixed_append_offset

std::optional<size_t> bb::UltraEccOpsTable::fixed_append_offset

private

Definition at line 240 of file ecc_ops_table.hpp.

◆ has_fixed_append

bool bb::UltraEccOpsTable::has_fixed_append = false

private

Definition at line 241 of file ecc_ops_table.hpp.

◆ NUM_ROWS_PER_OP

constexpr size_t bb::UltraEccOpsTable::NUM_ROWS_PER_OP = 2

staticconstexpr

Definition at line 225 of file ecc_ops_table.hpp.

◆ table

UltraOpsTable bb::UltraEccOpsTable::table

private

Definition at line 234 of file ecc_ops_table.hpp.

◆ TABLE_WIDTH

constexpr size_t bb::UltraEccOpsTable::TABLE_WIDTH = 4

staticconstexpr

Definition at line 224 of file ecc_ops_table.hpp.

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

src/barretenberg/op_queue/ecc_ops_table.hpp

Public Member Functions

Static Public Attributes

Private Types

Private Member Functions

Static Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

◆ ColumnPolynomials

◆ Curve

◆ Fr

◆ UltraOpsTable

Member Function Documentation

◆ construct_column_polynomials_from_subtables()

◆ construct_column_polynomials_with_fixed_append()

◆ construct_current_ultra_ops_subtable_columns()

◆ construct_previous_table_columns()

◆ construct_table_columns()

◆ create_new_subtable()

◆ current_ultra_subtable_size()

◆ get_current_subtable_size()

◆ get_reconstructed()

◆ get_reconstructed_with_fixed_append()

◆ merge()

◆ num_ops()

◆ num_ultra_rows()

◆ previous_ultra_table_size()

◆ push()

◆ write_op_to_polynomials()

Member Data Documentation

◆ current_subtable_idx

◆ fixed_append_offset

◆ has_fixed_append

◆ NUM_ROWS_PER_OP

◆ table

◆ TABLE_WIDTH