Struct Bit4Factors 

pub struct Bit4Factors { /* private fields */ }

Per-row scalars required by the four-bit unbiased dot estimator.

Implementations

impl Bit4Factors

pub const fn from_persisted( scale: f32, normalized_norm: f32, normalized_correction: f32, ) -> Self

Reconstructs the permanent three-f32 persisted factor record.

pub const fn persisted_fields(self) -> [f32; 3]

Returns the permanent little-endian record fields in declaration order.

pub const fn norm(self) -> f64

Returns the original row’s Euclidean norm.

A finite f32 row scale and finite normalized f32 norm are expanded in f64, so the logical norm remains usable above f32::MAX without enlarging the three-scalar factor record.

pub const fn correction(self) -> f64

Returns ||v||^2 / <y, v> for the selected grid direction.

The stored normalized correction is multiplied by the finite row scale in f64, avoiding overflow in persisted metadata.

pub fn reconstruction_error_bound(self) -> f64

Returns the L2 error bound for norm-scaled code reconstruction.

Every selected grid coordinate is sign-aligned with the input, hence the direction cosine is non-negative and the deterministic bound is sqrt(2) ||v||. The exact grid search normally gives a tighter error; retaining this conservative bound avoids a fourth per-row scalar.

Trait Implementations

impl Clone for Bit4Factors

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Bit4Factors

impl Debug for Bit4Factors

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Bit4Factors

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Bit4Factors