LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsygvx_work()

lapack_int LAPACKE_dsygvx_work ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
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  lwork,
lapack_int iwork,
lapack_int ifail 
)

Definition at line 35 of file lapacke_dsygvx_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_dsygvx( &itype, &jobz, &range, &uplo, &n, a, &lda, b, &ldb, &vl,
48  &vu, &il, &iu, &abstol, m, w, z, &ldz, work, &lwork,
49  iwork, 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 lda_t = MAX(1,n);
58  lapack_int ldb_t = MAX(1,n);
59  lapack_int ldz_t = MAX(1,n);
60  double* a_t = NULL;
61  double* b_t = NULL;
62  double* z_t = NULL;
63  /* Check leading dimension(s) */
64  if( lda < n ) {
65  info = -8;
66  LAPACKE_xerbla( "LAPACKE_dsygvx_work", info );
67  return info;
68  }
69  if( ldb < n ) {
70  info = -10;
71  LAPACKE_xerbla( "LAPACKE_dsygvx_work", info );
72  return info;
73  }
74  if( ldz < ncols_z ) {
75  info = -19;
76  LAPACKE_xerbla( "LAPACKE_dsygvx_work", info );
77  return info;
78  }
79  /* Query optimal working array(s) size if requested */
80  if( lwork == -1 ) {
81  LAPACK_dsygvx( &itype, &jobz, &range, &uplo, &n, a, &lda_t, b,
82  &ldb_t, &vl, &vu, &il, &iu, &abstol, m, w, z, &ldz_t,
83  work, &lwork, iwork, ifail, &info );
84  return (info < 0) ? (info - 1) : info;
85  }
86  /* Allocate memory for temporary array(s) */
87  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
88  if( a_t == NULL ) {
90  goto exit_level_0;
91  }
92  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
93  if( b_t == NULL ) {
95  goto exit_level_1;
96  }
97  if( LAPACKE_lsame( jobz, 'v' ) ) {
98  z_t = (double*)
99  LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,ncols_z) );
100  if( z_t == NULL ) {
102  goto exit_level_2;
103  }
104  }
105  /* Transpose input matrices */
106  LAPACKE_dsy_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
107  LAPACKE_dsy_trans( matrix_layout, uplo, n, b, ldb, b_t, ldb_t );
108  /* Call LAPACK function and adjust info */
109  LAPACK_dsygvx( &itype, &jobz, &range, &uplo, &n, a_t, &lda_t, b_t,
110  &ldb_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
111  work, &lwork, iwork, ifail, &info );
112  if( info < 0 ) {
113  info = info - 1;
114  }
115  /* Transpose output matrices */
116  LAPACKE_dsy_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
117  LAPACKE_dsy_trans( LAPACK_COL_MAJOR, uplo, n, b_t, ldb_t, b, ldb );
118  if( LAPACKE_lsame( jobz, 'v' ) ) {
119  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
120  ldz );
121  }
122  /* Release memory and exit */
123  if( LAPACKE_lsame( jobz, 'v' ) ) {
124  LAPACKE_free( z_t );
125  }
126 exit_level_2:
127  LAPACKE_free( b_t );
128 exit_level_1:
129  LAPACKE_free( a_t );
130 exit_level_0:
131  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
132  LAPACKE_xerbla( "LAPACKE_dsygvx_work", info );
133  }
134  } else {
135  info = -1;
136  LAPACKE_xerbla( "LAPACKE_dsygvx_work", info );
137  }
138  return info;
139 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dsygvx(...)
Definition: lapack.h:17508
#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)
#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)
void LAPACKE_dsy_trans(int matrix_layout, char uplo, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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