LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsbevx_work()

lapack_int LAPACKE_dsbevx_work ( int  matrix_layout,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_int  kd,
double *  ab,
lapack_int  ldab,
double *  q,
lapack_int  ldq,
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 
)

Definition at line 35 of file lapacke_dsbevx_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_dsbevx( &jobz, &range, &uplo, &n, &kd, ab, &ldab, q, &ldq, &vl,
48  &vu, &il, &iu, &abstol, m, w, z, &ldz, work, iwork,
49  ifail, &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( range, 'a' ) ||
55  LAPACKE_lsame( range, 'v' ) ) ? n :
56  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
57  lapack_int ldab_t = MAX(1,kd+1);
58  lapack_int ldq_t = MAX(1,n);
59  lapack_int ldz_t = MAX(1,n);
60  double* ab_t = NULL;
61  double* q_t = NULL;
62  double* z_t = NULL;
63  /* Check leading dimension(s) */
64  if( ldab < n ) {
65  info = -8;
66  LAPACKE_xerbla( "LAPACKE_dsbevx_work", info );
67  return info;
68  }
69  if( ldq < n ) {
70  info = -10;
71  LAPACKE_xerbla( "LAPACKE_dsbevx_work", info );
72  return info;
73  }
74  if( ldz < ncols_z ) {
75  info = -19;
76  LAPACKE_xerbla( "LAPACKE_dsbevx_work", info );
77  return info;
78  }
79  /* Allocate memory for temporary array(s) */
80  ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
81  if( ab_t == NULL ) {
83  goto exit_level_0;
84  }
85  if( LAPACKE_lsame( jobz, 'v' ) ) {
86  q_t = (double*)LAPACKE_malloc( sizeof(double) * ldq_t * MAX(1,n) );
87  if( q_t == NULL ) {
89  goto exit_level_1;
90  }
91  }
92  if( LAPACKE_lsame( jobz, 'v' ) ) {
93  z_t = (double*)
94  LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,ncols_z) );
95  if( z_t == NULL ) {
97  goto exit_level_2;
98  }
99  }
100  /* Transpose input matrices */
101  LAPACKE_dsb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
102  /* Call LAPACK function and adjust info */
103  LAPACK_dsbevx( &jobz, &range, &uplo, &n, &kd, ab_t, &ldab_t, q_t,
104  &ldq_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
105  work, iwork, ifail, &info );
106  if( info < 0 ) {
107  info = info - 1;
108  }
109  /* Transpose output matrices */
110  LAPACKE_dsb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
111  ldab );
112  if( LAPACKE_lsame( jobz, 'v' ) ) {
113  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
114  }
115  if( LAPACKE_lsame( jobz, 'v' ) ) {
116  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
117  ldz );
118  }
119  /* Release memory and exit */
120  if( LAPACKE_lsame( jobz, 'v' ) ) {
121  LAPACKE_free( z_t );
122  }
123 exit_level_2:
124  if( LAPACKE_lsame( jobz, 'v' ) ) {
125  LAPACKE_free( q_t );
126  }
127 exit_level_1:
128  LAPACKE_free( ab_t );
129 exit_level_0:
130  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
131  LAPACKE_xerbla( "LAPACKE_dsbevx_work", info );
132  }
133  } else {
134  info = -1;
135  LAPACKE_xerbla( "LAPACKE_dsbevx_work", info );
136  }
137  return info;
138 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dsbevx(...)
Definition: lapack.h:14892
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
void LAPACKE_dsb_trans(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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