LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_chbev_2stage_work()

lapack_int LAPACKE_chbev_2stage_work ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_int  kd,
lapack_complex_float ab,
lapack_int  ldab,
float *  w,
lapack_complex_float z,
lapack_int  ldz,
lapack_complex_float work,
lapack_int  lwork,
float *  rwork 
)

Definition at line 36 of file lapacke_chbev_2stage_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_chbev_2stage( &jobz, &uplo, &n, &kd, ab, &ldab, w, z, &ldz, work, &lwork,
47  rwork, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int ldab_t = MAX(1,kd+1);
53  lapack_int ldz_t = MAX(1,n);
54  lapack_complex_float* ab_t = NULL;
55  lapack_complex_float* z_t = NULL;
56  /* Check leading dimension(s) */
57  if( ldab < n ) {
58  info = -7;
59  LAPACKE_xerbla( "LAPACKE_chbev_2stage_work", info );
60  return info;
61  }
62  if( ldz < n ) {
63  info = -10;
64  LAPACKE_xerbla( "LAPACKE_chbev_2stage_work", info );
65  return info;
66  }
67  /* Query optimal working array(s) size if requested */
68  if( lwork == -1 ) {
69  LAPACK_chbev_2stage( &jobz, &uplo, &n, &kd, ab_t, &ldab_t, w, z_t, &ldz_t,
70  work, &lwork, rwork, &info );
71  return (info < 0) ? (info - 1) : info;
72  }
73  /* Allocate memory for temporary array(s) */
74  ab_t = (lapack_complex_float*)
75  LAPACKE_malloc( sizeof(lapack_complex_float) * ldab_t * MAX(1,n) );
76  if( ab_t == NULL ) {
78  goto exit_level_0;
79  }
80  if( LAPACKE_lsame( jobz, 'v' ) ) {
81  z_t = (lapack_complex_float*)
83  ldz_t * MAX(1,n) );
84  if( z_t == NULL ) {
86  goto exit_level_1;
87  }
88  }
89  /* Transpose input matrices */
90  LAPACKE_chb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
91  /* Call LAPACK function and adjust info */
92  LAPACK_chbev_2stage( &jobz, &uplo, &n, &kd, ab_t, &ldab_t, w, z_t, &ldz_t,
93  work, &lwork, rwork, &info );
94  if( info < 0 ) {
95  info = info - 1;
96  }
97  /* Transpose output matrices */
98  LAPACKE_chb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
99  ldab );
100  if( LAPACKE_lsame( jobz, 'v' ) ) {
101  LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
102  }
103  /* Release memory and exit */
104  if( LAPACKE_lsame( jobz, 'v' ) ) {
105  LAPACKE_free( z_t );
106  }
107 exit_level_1:
108  LAPACKE_free( ab_t );
109 exit_level_0:
110  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
111  LAPACKE_xerbla( "LAPACKE_chbev_2stage_work", info );
112  }
113  } else {
114  info = -1;
115  LAPACKE_xerbla( "LAPACKE_chbev_2stage_work", info );
116  }
117  return info;
118 }
void LAPACKE_cge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
void LAPACK_chbev_2stage(char *jobz, char *uplo, lapack_int *n, lapack_int *kd, lapack_complex_float *ab, lapack_int *ldab, float *w, lapack_complex_float *z, lapack_int *ldz, lapack_complex_float *work, lapack_int *lwork, float *rwork, lapack_int *info)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#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_chb_trans(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
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