lapack_int LAPACKE_ssbev_2stage( int matrix_layout, char jobz, char uplo, lapack_int n,
lapack_int kd, float* ab, lapack_int ldab, float* w,
float* z, lapack_int ldz )
{
lapack_int info = 0;
lapack_int lwork = -1;
float* work = NULL;
float work_query;
if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_ssbev_2stage", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
if( LAPACKE_get_nancheck() ) {
/* Optionally check input matrices for NaNs */
if( LAPACKE_ssb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
return -6;
}
}
#endif
/* Query optimal working array(s) size */
info = LAPACKE_ssbev_2stage_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
ldz, &work_query, lwork );
if( info != 0 ) {
goto exit_level_0;
}
lwork = (lapack_int)work_query;
/* Allocate memory for working array(s) */
work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
if( work == NULL ) {
info = LAPACK_WORK_MEMORY_ERROR;
goto exit_level_0;
}
/* Call middle-level interface */
info = LAPACKE_ssbev_2stage_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
ldz, work, lwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_ssbev_2stage", info );
}
return info;
}
lapack_int LAPACKE_ssbtrd( int matrix_order, char vect, char uplo, lapack_int n,
lapack_int kd, float* ab, lapack_int ldab, float* d,
float* e, float* q, lapack_int ldq )
{
lapack_int info = 0;
float* work = NULL;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_ssbtrd", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_ssb_nancheck( matrix_order, uplo, n, kd, ab, ldab ) ) {
return -6;
}
if( LAPACKE_lsame( vect, 'u' ) || LAPACKE_lsame( vect, 'v' ) ) {
if( LAPACKE_sge_nancheck( matrix_order, n, n, q, ldq ) ) {
return -10;
}
}
#endif
/* Allocate memory for working array(s) */
work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,n) );
if( work == NULL ) {
info = LAPACK_WORK_MEMORY_ERROR;
goto exit_level_0;
}
/* Call middle-level interface */
info = LAPACKE_ssbtrd_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_ssbtrd", info );
}
return info;
}
