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

lapack_int LAPACKE_cgesdd (int matrix_order, char jobz, lapack_int m, lapack_int n, lapack_complex_float *a, lapack_int lda, float *s, lapack_complex_float *u, lapack_int ldu, lapack_complex_float *vt, lapack_int ldvt)

Function/Subroutine Documentation

lapack_int LAPACKE_cgesdd ( int  matrix_order,
char  jobz,
lapack_int  m,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float *  s,
lapack_complex_float u,
lapack_int  ldu,
lapack_complex_float vt,
lapack_int  ldvt 
)

Definition at line 36 of file lapacke_cgesdd.c.

{
lapack_int info = 0;
lapack_int lwork = -1;
/* Additional scalars declarations for work arrays */
size_t lrwork;
lapack_int* iwork = NULL;
float* rwork = NULL;
lapack_complex_float* work = NULL;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_cgesdd", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_cge_nancheck( matrix_order, m, n, a, lda ) ) {
return -5;
}
#endif
/* Additional scalars initializations for work arrays */
if( LAPACKE_lsame( jobz, 'n' ) ) {
lrwork = MAX(1,5*MIN(m,n));
} else {
lrwork = (size_t)5*MAX(1,MIN(m,n))*MAX(1,MIN(m,n))+7*MIN(m,n);
}
/* Allocate memory for working array(s) */
iwork = (lapack_int*)
LAPACKE_malloc( sizeof(lapack_int) * MAX(1,8*MIN(m,n)) );
if( iwork == NULL ) {
goto exit_level_0;
}
rwork = (float*)LAPACKE_malloc( sizeof(float) * lrwork );
if( rwork == NULL ) {
goto exit_level_1;
}
/* Query optimal working array(s) size */
info = LAPACKE_cgesdd_work( matrix_order, jobz, m, n, a, lda, s, u, ldu, vt,
ldvt, &work_query, lwork, rwork, iwork );
if( info != 0 ) {
goto exit_level_2;
}
lwork = LAPACK_C2INT( work_query );
/* Allocate memory for work arrays */
if( work == NULL ) {
goto exit_level_2;
}
/* Call middle-level interface */
info = LAPACKE_cgesdd_work( matrix_order, jobz, m, n, a, lda, s, u, ldu, vt,
ldvt, work, lwork, rwork, iwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_2:
LAPACKE_free( rwork );
exit_level_1:
LAPACKE_free( iwork );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_cgesdd", info );
}
return info;
}

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