LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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lapacke_zgelss.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_zgelss (int matrix_order, lapack_int m, lapack_int n, lapack_int nrhs, lapack_complex_double *a, lapack_int lda, lapack_complex_double *b, lapack_int ldb, double *s, double rcond, lapack_int *rank)

Function/Subroutine Documentation

lapack_int LAPACKE_zgelss ( int  matrix_order,
lapack_int  m,
lapack_int  n,
lapack_int  nrhs,
lapack_complex_double a,
lapack_int  lda,
lapack_complex_double b,
lapack_int  ldb,
double *  s,
double  rcond,
lapack_int rank 
)

Definition at line 36 of file lapacke_zgelss.c.

{
lapack_int info = 0;
lapack_int lwork = -1;
double* rwork = NULL;
lapack_complex_double* work = NULL;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_zgelss", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_zge_nancheck( matrix_order, m, n, a, lda ) ) {
return -5;
}
if( LAPACKE_zge_nancheck( matrix_order, MAX(m,n), nrhs, b, ldb ) ) {
return -7;
}
if( LAPACKE_d_nancheck( 1, &rcond, 1 ) ) {
return -10;
}
#endif
/* Allocate memory for working array(s) */
rwork = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,5*MIN(m,n)) );
if( rwork == NULL ) {
goto exit_level_0;
}
/* Query optimal working array(s) size */
info = LAPACKE_zgelss_work( matrix_order, m, n, nrhs, a, lda, b, ldb, s,
rcond, rank, &work_query, lwork, rwork );
if( info != 0 ) {
goto exit_level_1;
}
lwork = LAPACK_Z2INT( work_query );
/* Allocate memory for work arrays */
if( work == NULL ) {
goto exit_level_1;
}
/* Call middle-level interface */
info = LAPACKE_zgelss_work( matrix_order, m, n, nrhs, a, lda, b, ldb, s,
rcond, rank, work, lwork, rwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_1:
LAPACKE_free( rwork );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_zgelss", info );
}
return info;
}

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