mkl_?getrinp

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 4/28/2026

Version

Public

mkl_?getrinp_compact

Compact Format

Syntax

void mkl_sgetrinp_compact ( MKL_LAYOUT layout , MKL_INT n , float * ap , MKL_INT ldap , float * work , MKL_INT lwork , MKL_INT * info , MKL_COMPACT_PACK format , MKL_INT nm );

voidmkl_dgetrinp_compact ( MKL_LAYOUTlayout , MKL_INTn , double*ap , MKL_INTldap , double*work , MKL_INTlwork , MKL_INT*info , MKL_COMPACT_PACKformat , MKL_INTnm );

void mkl_cgetrinp_compact ( MKL_LAYOUT layout , MKL_INT n , float * ap , MKL_INT ldap , float * work , MKL_INT lwork , MKL_INT * info , MKL_COMPACT_PACK format , MKL_INT nm );

void mkl_zgetrinp_compact ( MKL_LAYOUT layout , MKL_INT n , double * ap , MKL_INT ldap , double * work , MKL_INT lwork , MKL_INT * info , MKL_COMPACT_PACK format , MKL_INT nm );

Description

This routine computes the inverse inv( A _c ) of a set of general, n x n matrices A _c , that have been stored in Compact format. 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 ).
n: The order of A _c ; n >= 0.
ap: See Compact Format for more details.
ldap: Column stride (column-major layout) or row stride (row-major layout) of A _c .
work: Points to the beginning of the work array.
lwork: The size of the work array. If lwork = -1, a workspace query is assumed; the routine calculates only the optimal size of the work array and returns this value as the first entry of the work array.
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 on the Compact format matrices.

The total number of floating-point operations is approximately nm * (4/3) n ³ for real flavors and nm * (16/3) n ³ for complex flavors.

Output Parameters

ap: On exit, A _c is overwritten by inv(A _c ). ap points to the beginning of nm inv(A _c ) matrices stored in Compact format.
work[0]: On exit, work[0] contains the minimum value of lwork required for optimum performance. Use this lwork for subsequent runs.
info: The parameter is not currently used in this routine. It is reserved for the future use.

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