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

lapack_int LAPACKE_dsbtrd (int matrix_order, char vect, char uplo, lapack_int n, lapack_int kd, double *ab, lapack_int ldab, double *d, double *e, double *q, lapack_int ldq)

Function/Subroutine Documentation

lapack_int LAPACKE_dsbtrd ( int  matrix_order,
char  vect,
char  uplo,
lapack_int  n,
lapack_int  kd,
double *  ab,
lapack_int  ldab,
double *  d,
double *  e,
double *  q,
lapack_int  ldq 
)

Definition at line 36 of file lapacke_dsbtrd.c.

{
lapack_int info = 0;
double* work = NULL;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_dsbtrd", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_dsb_nancheck( matrix_order, uplo, n, kd, ab, ldab ) ) {
return -6;
}
if( LAPACKE_lsame( vect, 'u' ) || LAPACKE_lsame( vect, 'v' ) ) {
if( LAPACKE_dge_nancheck( matrix_order, n, n, q, ldq ) ) {
return -10;
}
}
#endif
/* Allocate memory for working array(s) */
work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) );
if( work == NULL ) {
goto exit_level_0;
}
/* Call middle-level interface */
info = LAPACKE_dsbtrd_work( matrix_order, vect, uplo, n, kd, ab, ldab, d, e,
q, ldq, work );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_dsbtrd", info );
}
return info;
}

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