LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhpevd_work()

lapack_int LAPACKE_zhpevd_work ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_complex_double ap,
double *  w,
lapack_complex_double z,
lapack_int  ldz,
lapack_complex_double work,
lapack_int  lwork,
double *  rwork,
lapack_int  lrwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_zhpevd_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_zhpevd( &jobz, &uplo, &n, ap, w, z, &ldz, work, &lwork, rwork,
48  &lrwork, iwork, &liwork, &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  lapack_int ldz_t = MAX(1,n);
54  lapack_complex_double* z_t = NULL;
55  lapack_complex_double* ap_t = NULL;
56  /* Check leading dimension(s) */
57  if( ldz < n ) {
58  info = -8;
59  LAPACKE_xerbla( "LAPACKE_zhpevd_work", info );
60  return info;
61  }
62  /* Query optimal working array(s) size if requested */
63  if( liwork == -1 || lrwork == -1 || lwork == -1 ) {
64  LAPACK_zhpevd( &jobz, &uplo, &n, ap, w, z, &ldz_t, work, &lwork,
65  rwork, &lrwork, iwork, &liwork, &info );
66  return (info < 0) ? (info - 1) : info;
67  }
68  /* Allocate memory for temporary array(s) */
69  if( LAPACKE_lsame( jobz, 'v' ) ) {
70  z_t = (lapack_complex_double*)
72  ldz_t * MAX(1,n) );
73  if( z_t == NULL ) {
75  goto exit_level_0;
76  }
77  }
78  ap_t = (lapack_complex_double*)
80  ( MAX(1,n) * MAX(2,n+1) ) / 2 );
81  if( ap_t == NULL ) {
83  goto exit_level_1;
84  }
85  /* Transpose input matrices */
86  LAPACKE_zhp_trans( matrix_layout, uplo, n, ap, ap_t );
87  /* Call LAPACK function and adjust info */
88  LAPACK_zhpevd( &jobz, &uplo, &n, ap_t, w, z_t, &ldz_t, work, &lwork,
89  rwork, &lrwork, iwork, &liwork, &info );
90  if( info < 0 ) {
91  info = info - 1;
92  }
93  /* Transpose output matrices */
94  if( LAPACKE_lsame( jobz, 'v' ) ) {
95  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
96  }
97  LAPACKE_zhp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
98  /* Release memory and exit */
99  LAPACKE_free( ap_t );
100 exit_level_1:
101  if( LAPACKE_lsame( jobz, 'v' ) ) {
102  LAPACKE_free( z_t );
103  }
104 exit_level_0:
105  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
106  LAPACKE_xerbla( "LAPACKE_zhpevd_work", info );
107  }
108  } else {
109  info = -1;
110  LAPACKE_xerbla( "LAPACKE_zhpevd_work", info );
111  }
112  return info;
113 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_double
Definition: lapacke.h:90
void LAPACKE_zhp_trans(int matrix_layout, char uplo, lapack_int n, const lapack_complex_double *in, lapack_complex_double *out)
#define MAX(x, y)
Definition: lapacke_utils.h:47
void LAPACK_zhpevd(char *jobz, char *uplo, lapack_int *n, lapack_complex_double *ap, double *w, lapack_complex_double *z, lapack_int *ldz, lapack_complex_double *work, lapack_int *lwork, double *rwork, lapack_int *lrwork, lapack_int *iwork, lapack_int *liwork, lapack_int *info)
#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
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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)
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