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

lapack_int LAPACKE_ssbevx_work (int matrix_order, char jobz, char range, char uplo, lapack_int n, lapack_int kd, float *ab, lapack_int ldab, float *q, lapack_int ldq, float vl, float vu, lapack_int il, lapack_int iu, float abstol, lapack_int *m, float *w, float *z, lapack_int ldz, float *work, lapack_int *iwork, lapack_int *ifail)

Function/Subroutine Documentation

lapack_int LAPACKE_ssbevx_work ( int  matrix_order,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_int  kd,
float *  ab,
lapack_int  ldab,
float *  q,
lapack_int  ldq,
float  vl,
float  vu,
lapack_int  il,
lapack_int  iu,
float  abstol,
lapack_int m,
float *  w,
float *  z,
lapack_int  ldz,
float *  work,
lapack_int iwork,
lapack_int ifail 
)

Definition at line 36 of file lapacke_ssbevx_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_ssbevx( &jobz, &range, &uplo, &n, &kd, ab, &ldab, q, &ldq, &vl,
&vu, &il, &iu, &abstol, m, w, z, &ldz, work, iwork,
ifail, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
LAPACKE_lsame( range, 'v' ) ) ? n :
( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
lapack_int ldab_t = MAX(1,kd+1);
lapack_int ldq_t = MAX(1,n);
lapack_int ldz_t = MAX(1,n);
float* ab_t = NULL;
float* q_t = NULL;
float* z_t = NULL;
/* Check leading dimension(s) */
if( ldab < n ) {
info = -8;
LAPACKE_xerbla( "LAPACKE_ssbevx_work", info );
return info;
}
if( ldq < n ) {
info = -10;
LAPACKE_xerbla( "LAPACKE_ssbevx_work", info );
return info;
}
if( ldz < ncols_z ) {
info = -19;
LAPACKE_xerbla( "LAPACKE_ssbevx_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
ab_t = (float*)LAPACKE_malloc( sizeof(float) * ldab_t * MAX(1,n) );
if( ab_t == NULL ) {
goto exit_level_0;
}
if( LAPACKE_lsame( jobz, 'v' ) ) {
q_t = (float*)LAPACKE_malloc( sizeof(float) * ldq_t * MAX(1,n) );
if( q_t == NULL ) {
goto exit_level_1;
}
}
if( LAPACKE_lsame( jobz, 'v' ) ) {
z_t = (float*)
LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,ncols_z) );
if( z_t == NULL ) {
goto exit_level_2;
}
}
/* Transpose input matrices */
LAPACKE_ssb_trans( matrix_order, uplo, n, kd, ab, ldab, ab_t, ldab_t );
/* Call LAPACK function and adjust info */
LAPACK_ssbevx( &jobz, &range, &uplo, &n, &kd, ab_t, &ldab_t, q_t,
&ldq_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
work, iwork, ifail, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_ssb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
ldab );
if( LAPACKE_lsame( jobz, 'v' ) ) {
LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
}
if( LAPACKE_lsame( jobz, 'v' ) ) {
LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
ldz );
}
/* Release memory and exit */
if( LAPACKE_lsame( jobz, 'v' ) ) {
LAPACKE_free( z_t );
}
exit_level_2:
if( LAPACKE_lsame( jobz, 'v' ) ) {
LAPACKE_free( q_t );
}
exit_level_1:
LAPACKE_free( ab_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_ssbevx_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_ssbevx_work", info );
}
return info;
}

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