LAPACK  3.8.0
LAPACK: Linear Algebra PACKage
lapacke_ssyevx_work.c
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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function ssyevx
30 * Author: Intel Corporation
31 * Generated June 2017
32 *****************************************************************************/
33 
34 #include "lapacke_utils.h"
35 
36 lapack_int LAPACKE_ssyevx_work( int matrix_layout, char jobz, char range,
37  char uplo, lapack_int n, float* a,
38  lapack_int lda, float vl, float vu,
39  lapack_int il, lapack_int iu, float abstol,
40  lapack_int* m, float* w, float* z,
41  lapack_int ldz, float* work, lapack_int lwork,
42  lapack_int* iwork, lapack_int* ifail )
43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_ssyevx( &jobz, &range, &uplo, &n, a, &lda, &vl, &vu, &il, &iu,
48  &abstol, m, w, z, &ldz, work, &lwork, iwork, ifail,
49  &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  lapack_int ncols_z = ( !LAPACKE_lsame( jobz, 'v' ) ) ? 1 :
55  ( LAPACKE_lsame( range, 'a' ) ||
56  LAPACKE_lsame( range, 'v' ) ) ? n :
57  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
58  lapack_int lda_t = MAX(1,n);
59  lapack_int ldz_t = MAX(1,n);
60  float* a_t = NULL;
61  float* z_t = NULL;
62  /* Check leading dimension(s) */
63  if( lda < n ) {
64  info = -7;
65  LAPACKE_xerbla( "LAPACKE_ssyevx_work", info );
66  return info;
67  }
68  if( ldz < ncols_z ) {
69  info = -16;
70  LAPACKE_xerbla( "LAPACKE_ssyevx_work", info );
71  return info;
72  }
73  /* Query optimal working array(s) size if requested */
74  if( lwork == -1 ) {
75  LAPACK_ssyevx( &jobz, &range, &uplo, &n, a, &lda_t, &vl, &vu, &il,
76  &iu, &abstol, m, w, z, &ldz_t, work, &lwork, iwork,
77  ifail, &info );
78  return (info < 0) ? (info - 1) : info;
79  }
80  /* Allocate memory for temporary array(s) */
81  a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
82  if( a_t == NULL ) {
84  goto exit_level_0;
85  }
86  if( LAPACKE_lsame( jobz, 'v' ) ) {
87  z_t = (float*)
88  LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,ncols_z) );
89  if( z_t == NULL ) {
91  goto exit_level_1;
92  }
93  }
94  /* Transpose input matrices */
95  LAPACKE_ssy_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
96  /* Call LAPACK function and adjust info */
97  LAPACK_ssyevx( &jobz, &range, &uplo, &n, a_t, &lda_t, &vl, &vu, &il,
98  &iu, &abstol, m, w, z_t, &ldz_t, work, &lwork, iwork,
99  ifail, &info );
100  if( info < 0 ) {
101  info = info - 1;
102  }
103  /* Transpose output matrices */
104  LAPACKE_ssy_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
105  if( LAPACKE_lsame( jobz, 'v' ) ) {
106  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
107  ldz );
108  }
109  /* Release memory and exit */
110  if( LAPACKE_lsame( jobz, 'v' ) ) {
111  LAPACKE_free( z_t );
112  }
113 exit_level_1:
114  LAPACKE_free( a_t );
115 exit_level_0:
116  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
117  LAPACKE_xerbla( "LAPACKE_ssyevx_work", info );
118  }
119  } else {
120  info = -1;
121  LAPACKE_xerbla( "LAPACKE_ssyevx_work", info );
122  }
123  return info;
124 }
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
lapack_int LAPACKE_ssyevx_work(int matrix_layout, char jobz, char range, char uplo, lapack_int n, float *a, lapack_int lda, 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 lwork, lapack_int *iwork, lapack_int *ifail)
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
void LAPACK_ssyevx(char *jobz, char *range, char *uplo, lapack_int *n, float *a, lapack_int *lda, 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 *lwork, lapack_int *iwork, lapack_int *ifail, lapack_int *info)
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define lapack_int
Definition: lapacke.h:47
void LAPACKE_ssy_trans(int matrix_layout, char uplo, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACKE_xerbla(const char *name, lapack_int info)