mkl_?gepack_compact

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 4/28/2026

Version

Public

mkl_?gepack_compact

Packs matrices from standard (row or column-major) format to Compact format.

Syntax

mkl_sgepack_compact ( MKL_LAYOUT layout , MKL_INT rows , MKL_INT columns , const float * const *a , MKL_INT lda , float *ap , MKL_INT ldap , MKL_COMPACT_PACK format , MKL_INT nm );

mkl_dgepack_compact ( MKL_LAYOUT layout , MKL_INT rows , MKL_INT columns , const double * const *a , MKL_INT lda , double *ap , MKL_INT ldap , MKL_COMPACT_PACK format , MKL_INT nm );

mkl_cgepack_compact ( MKL_LAYOUT layout , MKL_INT rows , MKL_INT columns , const mkl_compact_complex_float * const *a , MKL_INT lda , float *ap , MKL_INT ldap , MKL_COMPACT_PACK format , const MKL_INT nm );

mkl_zgepack_compact ( MKL_LAYOUT layout , MKL_INT rows , MKL_INT columns , const mkl_compact_complex_double * const *a , MKL_INT lda , double *ap , MKL_INT ldap , MKL_COMPACT_PACK format , MKL_INT nm );

Description

The routine packs nm matrices A from standard format (row or column-major, pointer to pointer) in a into Compact format, storing the new compact format matrices A _c in array ap .

Input Parameters

layout: Specifies whether two-dimensional array storage is row-major ( MKL_ROW_MAJOR ) or column-major ( MKL_COL_MAJOR ).
rows: The number of rows of A; rows >= 0.
columns: The number of columns of A; columns >= 0.
a: A standard format (row or column-major, pointer-to-pointer) array, storing nm input A matrices.
lda: Leading dimension of A. layout = MKL_COL_MAJOR lda must be at least max (1, rows ). layout = MKL_ROW_MAJOR lda must be at least max (1, columns ).
ldap: Leading dimension of A _c . layout = MKL_COL_MAJOR ldap must be at least max (1, rows ). layout = MKL_ROW_MAJOR ldap must be at least max (1, columns ). The values of ldap used in mkl_?gepack_compact must be consistent with the values used in mkl_?get_size_compact and mkl_?geunpack_compact .
format: Specifies the format of the compact matrices. See Compact Format or mkl_get_format_compact for details.
nm: Total number of matrices that will be stored in Compact format.

Application Notes:

Directly after calling this routine, any BLAS or LAPACK compact routine can be called. Unpacking matrices from Compact format can be done by calling mkl_?geunpack_compact .

Output Parameters

ap: Array storing the compact format input matrices A _c . ap must have size at least size = mkl_?get_size_compact.

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Developer Reference for Intel® oneAPI Math Kernel Library for C

mkl_?gepack_compact

Syntax

Description

Input Parameters

Output Parameters