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

lapack_int LAPACKE_dstebz (char range, char order, lapack_int n, double vl, double vu, lapack_int il, lapack_int iu, double abstol, const double *d, const double *e, lapack_int *m, lapack_int *nsplit, double *w, lapack_int *iblock, lapack_int *isplit)

Function/Subroutine Documentation

lapack_int LAPACKE_dstebz ( char  range,
char  order,
lapack_int  n,
double  vl,
double  vu,
lapack_int  il,
lapack_int  iu,
double  abstol,
const double *  d,
const double *  e,
lapack_int m,
lapack_int nsplit,
double *  w,
lapack_int iblock,
lapack_int isplit 
)

Definition at line 36 of file lapacke_dstebz.c.

{
lapack_int info = 0;
lapack_int* iwork = NULL;
double* work = NULL;
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_d_nancheck( 1, &abstol, 1 ) ) {
return -8;
}
if( LAPACKE_d_nancheck( n, d, 1 ) ) {
return -9;
}
if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
return -10;
}
if( LAPACKE_lsame( range, 'v' ) ) {
if( LAPACKE_d_nancheck( 1, &vl, 1 ) ) {
return -4;
}
}
if( LAPACKE_lsame( range, 'v' ) ) {
if( LAPACKE_d_nancheck( 1, &vu, 1 ) ) {
return -5;
}
}
#endif
/* Allocate memory for working array(s) */
iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,3*n) );
if( iwork == NULL ) {
goto exit_level_0;
}
work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,4*n) );
if( work == NULL ) {
goto exit_level_1;
}
/* Call middle-level interface */
info = LAPACKE_dstebz_work( range, order, n, vl, vu, il, iu, abstol, d, e,
m, nsplit, w, iblock, isplit, work, iwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_1:
LAPACKE_free( iwork );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_dstebz", info );
}
return info;
}

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