LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapacke_dspevx_work.c
Go to the documentation of this file.
1 /*****************************************************************************
2  Copyright (c) 2014, Intel Corp.
3  All rights reserved.
4 
5  Redistribution and use in source and binary forms, with or without
6  modification, are permitted provided that the following conditions are met:
7 
8  * Redistributions of source code must retain the above copyright notice,
9  this list of conditions and the following disclaimer.
10  * Redistributions in binary form must reproduce the above copyright
11  notice, this list of conditions and the following disclaimer in the
12  documentation and/or other materials provided with the distribution.
13  * Neither the name of Intel Corporation nor the names of its contributors
14  may be used to endorse or promote products derived from this software
15  without specific prior written permission.
16 
17  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27  THE POSSIBILITY OF SUCH DAMAGE.
28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function dspevx
30 * Author: Intel Corporation
31 * Generated November 2015
32 *****************************************************************************/
33 
34 #include "lapacke_utils.h"
35 
36 lapack_int LAPACKE_dspevx_work( int matrix_layout, char jobz, char range,
37  char uplo, lapack_int n, double* ap, double vl,
38  double vu, lapack_int il, lapack_int iu,
39  double abstol, lapack_int* m, double* w,
40  double* z, lapack_int ldz, double* work,
41  lapack_int* iwork, lapack_int* ifail )
42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dspevx( &jobz, &range, &uplo, &n, ap, &vl, &vu, &il, &iu,
47  &abstol, m, w, z, &ldz, work, iwork, ifail, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
53  LAPACKE_lsame( range, 'v' ) ) ? n :
54  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
55  lapack_int ldz_t = MAX(1,n);
56  double* z_t = NULL;
57  double* ap_t = NULL;
58  /* Check leading dimension(s) */
59  if( ldz < ncols_z ) {
60  info = -15;
61  LAPACKE_xerbla( "LAPACKE_dspevx_work", info );
62  return info;
63  }
64  /* Allocate memory for temporary array(s) */
65  if( LAPACKE_lsame( jobz, 'v' ) ) {
66  z_t = (double*)
67  LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,ncols_z) );
68  if( z_t == NULL ) {
70  goto exit_level_0;
71  }
72  }
73  ap_t = (double*)
74  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
75  if( ap_t == NULL ) {
77  goto exit_level_1;
78  }
79  /* Transpose input matrices */
80  LAPACKE_dsp_trans( matrix_layout, uplo, n, ap, ap_t );
81  /* Call LAPACK function and adjust info */
82  LAPACK_dspevx( &jobz, &range, &uplo, &n, ap_t, &vl, &vu, &il, &iu,
83  &abstol, m, w, z_t, &ldz_t, work, iwork, ifail, &info );
84  if( info < 0 ) {
85  info = info - 1;
86  }
87  /* Transpose output matrices */
88  if( LAPACKE_lsame( jobz, 'v' ) ) {
89  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
90  ldz );
91  }
92  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
93  /* Release memory and exit */
94  LAPACKE_free( ap_t );
95 exit_level_1:
96  if( LAPACKE_lsame( jobz, 'v' ) ) {
97  LAPACKE_free( z_t );
98  }
99 exit_level_0:
100  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
101  LAPACKE_xerbla( "LAPACKE_dspevx_work", info );
102  }
103  } else {
104  info = -1;
105  LAPACKE_xerbla( "LAPACKE_dspevx_work", info );
106  }
107  return info;
108 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
void LAPACK_dspevx(char *jobz, char *range, char *uplo, lapack_int *n, double *ap, double *vl, double *vu, lapack_int *il, lapack_int *iu, double *abstol, lapack_int *m, double *w, double *z, lapack_int *ldz, double *work, lapack_int *iwork, lapack_int *ifail, lapack_int *info)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
lapack_int LAPACKE_dspevx_work(int matrix_layout, char jobz, char range, char uplo, lapack_int n, double *ap, double vl, double vu, lapack_int il, lapack_int iu, double abstol, lapack_int *m, double *w, double *z, lapack_int ldz, double *work, lapack_int *iwork, lapack_int *ifail)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
void LAPACKE_dsp_trans(int matrix_layout, char uplo, lapack_int n, const double *in, double *out)
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123