tagOski_submatMBCSR_t Struct Reference

#include <format.h>

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Detailed Description

Stores an MBCSR "submatrix".

An matrix stored in MBCSR submatrix format must satisfy the following conditions:

• divides
• 

Let be the number of block rows. Then is stored in 4 arrays, , as follows:

• is an array of length containing all the elements of that lie within the diagonal blocks beginning at element where each block is a square block. The blocks are stored consecutively, and each block is stored in row-major order. More precisely, for all , , and , the array element stores the matrix element .
• is an integer array of block-row pointers, of length at least .
• is an integer array of block column indices, of length at least .
• is an array of non-zero block values, of length at least .
• Define block-row , where , as rows through of . Then For each such that , is the column index of the entry of an explicitly stored non-zero block whose values are laid out in row-major order in the subarray .
• If any block in overlaps with a diagonal block in , then the corresponding entries in are set to 0.
• No block in is defined so that it extends beyond column of . That is, if does not divide , then each block row may contain one block with . If such a block overlaps with another block starting at column index , then the initial columns of the block at are set to zero.

Data Fields
oski_index_t	num_block_rows
	# of full block rows; if 0, all other fields are invalid.
oski_index_t	offset
	Row/column index of first diagonal block.
oski_index_t	r
	Row block size.
oski_index_t	c
	Column block size.
oski_index_t *	bptr
	Block row pointers.
oski_index_t *	bind
	Column indices.
oski_value_t *	bval
	Non-zero value off-diagonal blocks.
oski_value_t *	bdiag
	Non-zero value diagonal blocks.
char *	mod_name
	Name of module at this block size.
void *	mod_cached
	Cached implementation.

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

• MBCSR/format.h

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