mkl_?geunpack

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 4/28/2026

Version

Public

mkl_?geunpack_compact

Unpacks matrices from Compact format to standard (row- or column-major, pointer-to-pointer) format.

Syntax

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

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

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

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

Description

The routine unpacks nm Compact format matrices A _c from array ap into standard (row- or column-major, pointer-to-pointer) format in array A .

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.
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 ).
ap: Array storing the compact format of input matrices A _c . See Compact Format or mkl_get_format_compact for details. layout = MKL_COL_MAJOR ap has size ldap * columns * nm . layout = MKL_ROW_MAJOR ap has size ldap * rows * nm .
ldap: Leading dimension of 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_?geunpack_compact must be consistent with the values used in mkl_?get_size_compact and mkl_?gepack_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.

Output Parameters

a: A standard format (row- or column-major, pointer-to-pointer) array, storing nm output A matrices. layout = MKL_COL_MAJOR a has size lda * columns * nm . layout = MKL_ROW_MAJOR a has size lda * rows * nm .

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