LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhegvx_work()

lapack_int LAPACKE_zhegvx_work ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_complex_double a,
lapack_int  lda,
lapack_complex_double b,
lapack_int  ldb,
double  vl,
double  vu,
lapack_int  il,
lapack_int  iu,
double  abstol,
lapack_int m,
double *  w,
lapack_complex_double z,
lapack_int  ldz,
lapack_complex_double work,
lapack_int  lwork,
double *  rwork,
lapack_int iwork,
lapack_int ifail 
)

Definition at line 35 of file lapacke_zhegvx_work.c.

45 {
46  lapack_int info = 0;
47  if( matrix_layout == LAPACK_COL_MAJOR ) {
48  /* Call LAPACK function and adjust info */
49  LAPACK_zhegvx( &itype, &jobz, &range, &uplo, &n, a, &lda, b, &ldb, &vl,
50  &vu, &il, &iu, &abstol, m, w, z, &ldz, work, &lwork,
51  rwork, iwork, ifail, &info );
52  if( info < 0 ) {
53  info = info - 1;
54  }
55  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
56  lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
57  LAPACKE_lsame( range, 'v' ) ) ? n :
58  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
59  lapack_int lda_t = MAX(1,n);
60  lapack_int ldb_t = MAX(1,n);
61  lapack_int ldz_t = MAX(1,n);
62  lapack_complex_double* a_t = NULL;
63  lapack_complex_double* b_t = NULL;
64  lapack_complex_double* z_t = NULL;
65  /* Check leading dimension(s) */
66  if( lda < n ) {
67  info = -8;
68  LAPACKE_xerbla( "LAPACKE_zhegvx_work", info );
69  return info;
70  }
71  if( ldb < n ) {
72  info = -10;
73  LAPACKE_xerbla( "LAPACKE_zhegvx_work", info );
74  return info;
75  }
76  if( ldz < ncols_z ) {
77  info = -19;
78  LAPACKE_xerbla( "LAPACKE_zhegvx_work", info );
79  return info;
80  }
81  /* Query optimal working array(s) size if requested */
82  if( lwork == -1 ) {
83  LAPACK_zhegvx( &itype, &jobz, &range, &uplo, &n, a, &lda_t, b,
84  &ldb_t, &vl, &vu, &il, &iu, &abstol, m, w, z, &ldz_t,
85  work, &lwork, rwork, iwork, ifail, &info );
86  return (info < 0) ? (info - 1) : info;
87  }
88  /* Allocate memory for temporary array(s) */
89  a_t = (lapack_complex_double*)
90  LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
91  if( a_t == NULL ) {
93  goto exit_level_0;
94  }
95  b_t = (lapack_complex_double*)
96  LAPACKE_malloc( sizeof(lapack_complex_double) * ldb_t * MAX(1,n) );
97  if( b_t == NULL ) {
99  goto exit_level_1;
100  }
101  if( LAPACKE_lsame( jobz, 'v' ) ) {
102  z_t = (lapack_complex_double*)
104  ldz_t * MAX(1,ncols_z) );
105  if( z_t == NULL ) {
107  goto exit_level_2;
108  }
109  }
110  /* Transpose input matrices */
111  LAPACKE_zhe_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
112  LAPACKE_zhe_trans( matrix_layout, uplo, n, b, ldb, b_t, ldb_t );
113  /* Call LAPACK function and adjust info */
114  LAPACK_zhegvx( &itype, &jobz, &range, &uplo, &n, a_t, &lda_t, b_t,
115  &ldb_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
116  work, &lwork, rwork, iwork, ifail, &info );
117  if( info < 0 ) {
118  info = info - 1;
119  }
120  /* Transpose output matrices */
121  LAPACKE_zhe_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
122  LAPACKE_zhe_trans( LAPACK_COL_MAJOR, uplo, n, b_t, ldb_t, b, ldb );
123  if( LAPACKE_lsame( jobz, 'v' ) ) {
124  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
125  ldz );
126  }
127  /* Release memory and exit */
128  if( LAPACKE_lsame( jobz, 'v' ) ) {
129  LAPACKE_free( z_t );
130  }
131 exit_level_2:
132  LAPACKE_free( b_t );
133 exit_level_1:
134  LAPACKE_free( a_t );
135 exit_level_0:
136  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
137  LAPACKE_xerbla( "LAPACKE_zhegvx_work", info );
138  }
139  } else {
140  info = -1;
141  LAPACKE_xerbla( "LAPACKE_zhegvx_work", info );
142  }
143  return info;
144 }
#define LAPACK_zhegvx(...)
Definition: lapack.h:7269
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_double
Definition: lapack.h:63
#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_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
void LAPACKE_zhe_trans(int matrix_layout, char uplo, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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