?lacp2

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 3/31/2023

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?lacp2

Copies all or part of a real two-dimensional array to a complex array.

Syntax

lapack_int LAPACKE_clacp2 (int matrix_layout , char uplo , lapack_int m , lapack_int n , const float * a , lapack_int lda , lapack_complex_float * b , lapack_int ldb );

lapack_int LAPACKE_zlacp2 (int matrix_layout , char uplo , lapack_int m , lapack_int n , const double * a , lapack_int lda , lapack_complex_double * b , lapack_int ldb );

Include Files

mkl.h

Description

The routine copies all or part of a real matrix A to another matrix B.

Input Parameters

matrix_layout

Specifies whether matrix storage layout is row major (LAPACK_ROW_MAJOR) or column major (LAPACK_COL_MAJOR).

uplo

Specifies the part of the matrix A to be copied to B.

If uplo = 'U', the upper triangular part of A;

if uplo = 'L', the lower triangular part of A.

Otherwise, all of the matrix A is copied.

m

The number of rows in the matrix A (m≥ 0).

n

The number of columns in A (n≥ 0).

a

Array, size at least max(1,lda*n) for column major and max(1,lda*m) for row major, contains the m-by-n matrix A.

If uplo = 'U', only the upper triangle or trapezoid is accessed; if uplo = 'L', only the lower triangle or trapezoid is accessed.

lda

The leading dimension of a; lda≥ max(1, m) for column major and lda≥ max(1, n) for row major.

ldb

The leading dimension of the output array b; ldb≥ max(1, m) for column major and ldb≥ max(1, n) for row major.

Output Parameters

b

Array, size at least max(1,ldb*n) for column major layout and max(1,ldb*m) for row major layout, contains the m-by-n matrix B.

On exit, B = A in the locations specified by uplo.

Return Values

This function returns a value info.

If info = 0, the execution is successful.

If info < 0, the i-th parameter had an illegal value.

If info = -1011, memory allocation error occurred.

Parent topic: LAPACK Auxiliary Routines

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Developer Reference for Intel® oneAPI Math Kernel Library for C

?lacp2