Struct BsrMatrix 

pub struct BsrMatrix { /* private fields */ }

Block Sparse Row matrix.

A matrix of shape (block_rows * block_size) × (block_cols * block_size), where non-zero blocks are stored in CSR-of-blocks layout.

Implementations

impl BsrMatrix

pub fn new( block_rows: usize, block_cols: usize, block_size: usize, offsets: Vec<u32>, col_indices: Vec<u32>, values: Vec<f32>, ) -> Result<Self, SparseError>

Create a new BSR matrix.

Arguments

• block_rows, block_cols: number of block rows/columns
• block_size: dimension of each square block
• offsets: CSR-style row offsets for blocks
• col_indices: block column indices
• values: dense block data (row-major per block)

Errors

Returns error if structure is invalid.

pub fn from_dense( data: &[f32], rows: usize, cols: usize, block_size: usize, ) -> Self

Create BSR from a dense matrix.

Pads the matrix if dimensions aren’t divisible by block_size. Only stores blocks with at least one non-zero element.

pub fn to_csr(&self) -> Result<CsrMatrix<f32>, SparseError>

Convert to CSR format.

Errors

Returns error if the internal conversion produces invalid CSR.

pub fn rows(&self) -> usize

Total matrix rows.

pub fn cols(&self) -> usize

Total matrix columns.

pub fn nnz_blocks(&self) -> usize

Number of non-zero blocks.

pub fn block_size(&self) -> usize

Block size.

Trait Implementations

impl Clone for BsrMatrix

fn clone(&self) -> BsrMatrix

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BsrMatrix

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

Formats the value using the given formatter.

impl SparseOps for BsrMatrix

fn spmv( &self, alpha: f32, x: &[f32], beta: f32, y: &mut [f32], ) -> Result<(), SparseError>

Sparse matrix-vector multiply: y = α * A * x + β * y

fn spmm( &self, alpha: f32, b: &[f32], b_cols: usize, beta: f32, c: &mut [f32], ) -> Result<(), SparseError>

Sparse matrix-dense matrix multiply: C = α * A * B + β * C