MatSeqAIJSetValuesLocalFast#

An optimized version of MatSetValuesLocal() for MATSEQAIJ matrices, valid under several restrictive assumptions.

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatSeqAIJSetValuesLocalFast(Mat A, PetscInt m, const PetscInt im[], PetscInt n, const PetscInt in[], const PetscScalar v[], InsertMode is)

Not Collective

Input Parameters#

A - the MATSEQAIJ matrix
m - the number of rows being set (must be 1)
im - array of length m giving the local row index
n - the number of columns being set
in - array of length n giving the local column indices
v - array of length n of values to add
is - the insert mode (must be ADD_VALUES)

Notes#

This routine requires that a single row of values is set with each call, that no row or column index is negative or larger than the number of rows or columns, that values are always added (not inserted), and that no new nonzero locations are introduced.

The global column indices are not assumed to be sorted.

Level#

developer

Location#

src/mat/impls/aij/seq/aij.c

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