?larcm

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 4/28/2026

Version

Public

?larcm

Multiplies a square real matrix by a complex matrix.

Syntax

lapack_int LAPACKE_clarcm ( int matrix_layout , lapack_int m , lapack_int n , const float *a , lapack_int lda , const lapack_complex_float * b , lapack_int ldb , lapack_complex_float * c, lapack_int ldc );

lapack_int LAPACKE_zlarcm ( int matrix_layout , lapack_int m , lapack_int n , const double * a , lapack_int lda , const lapack_complex_double *b , lapack_int ldb , lapack_complex_double *c , lapack_int ldc );

Description

clarcm zlarcm

The routine performs a simple matrix-matrix multiplication of the form

C = A*B ,

where A is m -by- m and real, B is m -by- n and complex, and C is m -by- n and complex.

Input Parameters

m

The number of rows and columns of matrix A and the number of rows of matrix C ( m≥ 0 ).

n

The number of columns of matrix B and the number of columns of matrix C

( n≥ 0 ).

a: REAL for clarcm DOUBLE PRECISION for zlarcm Array, size (lda, m) . Contains the m -by- m matrix A . Array, size [lda* m] . Contains the m -by- m matrix A .

lda

The leading dimension of the array a , lda≥max(1, m) .

b

COMPLEX for clarcm DOUBLE COMPLEX for zlarcm

Array, DIMENSION size (ldb, n) . Contains the m -by- n matrix B .

ldb

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

ldc

The leading dimension of the array c , ldc ≥ max (1, m ) for column-major layout; ldc ≥ max (1, n ) for row-major layout .

rwork: REAL for clarcm DOUBLE PRECISION for zlarcm Workspace array, DIMENSION (2*m*n) .

Output Parameters

c: COMPLEX for clarcm DOUBLE COMPLEX for zlarcm Array, size ( ldc , n ). Contains the m -by- n matrix C .

Return Values

This function returns a value info . If info = 0, the execution is successful. If info = - i , parameter i had an illegal value.

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Developer Reference for Intel® oneAPI Math Kernel Library for C

?larcm

Syntax

Description

Input Parameters

Output Parameters

Return Values