LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cheevx_2stage_work()

lapack_int LAPACKE_cheevx_2stage_work ( int  matrix_layout,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float  vl,
float  vu,
lapack_int  il,
lapack_int  iu,
float  abstol,
lapack_int m,
float *  w,
lapack_complex_float z,
lapack_int  ldz,
lapack_complex_float work,
lapack_int  lwork,
float *  rwork,
lapack_int iwork,
lapack_int ifail 
)

Definition at line 36 of file lapacke_cheevx_2stage_work.c.

45 {
46  lapack_int info = 0;
47  if( matrix_layout == LAPACK_COL_MAJOR ) {
48  /* Call LAPACK function and adjust info */
49  LAPACK_cheevx_2stage( &jobz, &range, &uplo, &n, a, &lda, &vl, &vu, &il, &iu,
50  &abstol, m, w, z, &ldz, work, &lwork, rwork, iwork,
51  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 ldz_t = MAX(1,n);
61  lapack_complex_float* a_t = NULL;
62  lapack_complex_float* z_t = NULL;
63  /* Check leading dimension(s) */
64  if( lda < n ) {
65  info = -7;
66  LAPACKE_xerbla( "LAPACKE_cheevx_2stage_work", info );
67  return info;
68  }
69  if( ldz < ncols_z ) {
70  info = -16;
71  LAPACKE_xerbla( "LAPACKE_cheevx_2stage_work", info );
72  return info;
73  }
74  /* Query optimal working array(s) size if requested */
75  if( lwork == -1 ) {
76  LAPACK_cheevx_2stage( &jobz, &range, &uplo, &n, a, &lda_t, &vl, &vu, &il,
77  &iu, &abstol, m, w, z, &ldz_t, work, &lwork, rwork,
78  iwork, ifail, &info );
79  return (info < 0) ? (info - 1) : info;
80  }
81  /* Allocate memory for temporary array(s) */
82  a_t = (lapack_complex_float*)
83  LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
84  if( a_t == NULL ) {
86  goto exit_level_0;
87  }
88  if( LAPACKE_lsame( jobz, 'v' ) ) {
89  z_t = (lapack_complex_float*)
91  ldz_t * MAX(1,ncols_z) );
92  if( z_t == NULL ) {
94  goto exit_level_1;
95  }
96  }
97  /* Transpose input matrices */
98  LAPACKE_che_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
99  /* Call LAPACK function and adjust info */
100  LAPACK_cheevx_2stage( &jobz, &range, &uplo, &n, a_t, &lda_t, &vl, &vu, &il,
101  &iu, &abstol, m, w, z_t, &ldz_t, work, &lwork, rwork,
102  iwork, ifail, &info );
103  if( info < 0 ) {
104  info = info - 1;
105  }
106  /* Transpose output matrices */
107  LAPACKE_che_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
108  if( LAPACKE_lsame( jobz, 'v' ) ) {
109  LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
110  ldz );
111  }
112  /* Release memory and exit */
113  if( LAPACKE_lsame( jobz, 'v' ) ) {
114  LAPACKE_free( z_t );
115  }
116 exit_level_1:
117  LAPACKE_free( a_t );
118 exit_level_0:
119  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
120  LAPACKE_xerbla( "LAPACKE_cheevx_2stage_work", info );
121  }
122  } else {
123  info = -1;
124  LAPACKE_xerbla( "LAPACKE_cheevx_2stage_work", info );
125  }
126  return info;
127 }
void LAPACKE_che_trans(int matrix_layout, char uplo, lapack_int n, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
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
#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 LAPACK_cheevx_2stage(char *jobz, char *range, char *uplo, lapack_int *n, lapack_complex_float *a, lapack_int *lda, float *vl, float *vu, lapack_int *il, lapack_int *iu, float *abstol, lapack_int *m, float *w, lapack_complex_float *z, lapack_int *ldz, lapack_complex_float *work, lapack_int *lwork, float *rwork, lapack_int *iwork, lapack_int *ifail, lapack_int *info)
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