mkl_?getrfnp

Developer Reference for Intel® oneAPI Math Kernel Library for C

Download PDF

ID 766684

Date 4/28/2026

Version

Public

mkl_?getrfnp_compact

Compact Format

Syntax

void mkl_sgetrfnp_compact ( MKL_LAYOUT layout , MKL_INT m , MKL_INT n , float * ap , MKL_INT ldap , MKL_INT * info , MKL_COMPACT_PACK format , MKL_INT nm );

voidmkl_dgetrfnp_compact ( MKL_LAYOUTlayout , MKL_INTm , MKL_INTn , double*ap , MKL_INTldap , MKL_INT*info , MKL_COMPACT_PACKformat , MKL_INTnm );

void mkl_cgetrfnp_compact ( MKL_LAYOUT layout , MKL_INT m , MKL_INT n , float * ap , MKL_INT ldap , MKL_INT * info , MKL_COMPACT_PACK format , MKL_INT nm );

void mkl_zgetrfnp_compact ( MKL_LAYOUT layout , MKL_INT m , MKL_INT n , double * ap , MKL_INT ldap , MKL_INT * info , MKL_COMPACT_PACK format , MKL_INT nm );

Description

The mkl_?getrfnp_compact routine calculates the LU factorizations of a set of nm general (m x n) matrices A, stored in Compact format, as A _c = L _c *U _c . The factorization (output) data will also be stored in Compact format. Compact routines have some limitations; see Numerical Limitations .

Input Parameters

layout: Specifies whether two-dimensional array storage is row-major ( MKL_ROW_MAJOR ) or column-major ( MKL_COL_MAJOR ).
m: The number of rows of A; m ≥ 0.
n: The number of columns of A; n ≥ 0.
ap: See Compact Format for more details.
ldap: Leading dimension of A _c .
format: Specifies the format of the compact matrices. See Compact Format or mkl_get_format_compact for details.
nm: Total number of matrices stored in Compact format.

Application Notes:

Before calling this routine, mkl_?gepack_compact must be called. After calling this routine, mkl_?geunpack_compact should be called, unless another compact routine will be subsequently called for the Compact format matrices.

The approximate number of floating-point operations for real flavors is:

nm*(2/3)n ³ , if m = n,

nm*(1/3)n ² (3m-n), if m > n,

nm*(1/3)m ² (3n-m), if m < n.

The number of operations for complex flavors is four times greater. Directly after calling this routine, you can call the following:

mkl_?getrinp_compact , for computing the inverse of the nm input matrices in Compact format

Output Parameters

ap: On exit, A _c is overwritten by its factorization data. ap points to the beginning of nm L _c and U _c factors of A _c . The unit diagonal elements of L _c are not stored.
info: The parameter is not currently used in this routine. It is reserved for the future use.

Select Your Language

Using Intel.com Search

Quick Links

Recent Searches

Advanced Search

Only search in