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

lapack_int LAPACKE_zhbevd (int matrix_order, char jobz, char uplo, lapack_int n, lapack_int kd, lapack_complex_double *ab, lapack_int ldab, double *w, lapack_complex_double *z, lapack_int ldz)

Function/Subroutine Documentation

lapack_int LAPACKE_zhbevd ( int  matrix_order,
char  jobz,
char  uplo,
lapack_int  n,
lapack_int  kd,
lapack_complex_double ab,
lapack_int  ldab,
double *  w,
lapack_complex_double z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_zhbevd.c.

{
lapack_int info = 0;
lapack_int liwork = -1;
lapack_int lrwork = -1;
lapack_int lwork = -1;
lapack_int* iwork = NULL;
double* rwork = NULL;
lapack_complex_double* work = NULL;
lapack_int iwork_query;
double rwork_query;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_zhbevd", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_zhb_nancheck( matrix_order, uplo, n, kd, ab, ldab ) ) {
return -6;
}
#endif
/* Query optimal working array(s) size */
info = LAPACKE_zhbevd_work( matrix_order, jobz, uplo, n, kd, ab, ldab, w, z,
ldz, &work_query, lwork, &rwork_query, lrwork,
&iwork_query, liwork );
if( info != 0 ) {
goto exit_level_0;
}
liwork = (lapack_int)iwork_query;
lrwork = (lapack_int)rwork_query;
lwork = LAPACK_Z2INT( work_query );
/* Allocate memory for work arrays */
iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
if( iwork == NULL ) {
goto exit_level_0;
}
rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
if( rwork == NULL ) {
goto exit_level_1;
}
if( work == NULL ) {
goto exit_level_2;
}
/* Call middle-level interface */
info = LAPACKE_zhbevd_work( matrix_order, jobz, uplo, n, kd, ab, ldab, w, z,
ldz, work, lwork, rwork, lrwork, iwork,
liwork );
/* 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_zhbevd", info );
}
return info;
}

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