oski_matVBR_t Struct Reference

#include <format.h>

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Detailed Description

Variable block row (VBR) format.

Variable block row (VBR) format generalizes block compressed sparse row (BCSR) by allowing block rows and columns to have variable sizes.

An matrix stored in VBR format is partitioned into block rows and block columns and then stored into six arrays:

• brow[0:] stores the starting positions in of each block row. More specifically, the block row starts at row brow[] of , ends at brow[]-1, and brow[] = .
• bcol[0:] stores the block column positions.
• val[0:] stores the non-zero values, block-by-block, with blocks laid out by row.
• val_ptr[0:] stores starting offsets of each block within val. The block starts at position val_ptr[] in the array val. The last element val_ptr[0:] = .
• ind[0:] stores the block column indices. The block begins at column bcol[ind[MI^{{th}}I

Data Fields
oski_index_t	mb
	No.
oski_index_t	nb
	No.
oski_index_t *	brow
	Block row starting indices.
oski_index_t *	bcol
	Block column starting indices.
oski_value_t *	val
	Non-zero values.
oski_index_t *	valptr
	Block value pointers.
oski_index_t *	ind
	Block column indices.
oski_index_t *	ptr
	Block row pointers.

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Field Documentation

oski_index_t oski_matVBR_t::mb

No. of block rows, .

oski_index_t oski_matVBR_t::nb

No. of block columns, .

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

• VBR/format.h

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