LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sstedc_work()

lapack_int LAPACKE_sstedc_work ( int  matrix_layout,
char  compz,
lapack_int  n,
float *  d,
float *  e,
float *  z,
lapack_int  ldz,
float *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_sstedc_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_sstedc( &compz, &n, d, e, z, &ldz, work, &lwork, iwork, &liwork,
45  &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int ldz_t = MAX(1,n);
51  float* z_t = NULL;
52  /* Check leading dimension(s) */
53  if( ldz < n ) {
54  info = -7;
55  LAPACKE_xerbla( "LAPACKE_sstedc_work", info );
56  return info;
57  }
58  /* Query optimal working array(s) size if requested */
59  if( liwork == -1 || lwork == -1 ) {
60  LAPACK_sstedc( &compz, &n, d, e, z, &ldz_t, work, &lwork, iwork,
61  &liwork, &info );
62  return (info < 0) ? (info - 1) : info;
63  }
64  /* Allocate memory for temporary array(s) */
65  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
66  z_t = (float*)LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,n) );
67  if( z_t == NULL ) {
69  goto exit_level_0;
70  }
71  }
72  /* Transpose input matrices */
73  if( LAPACKE_lsame( compz, 'v' ) ) {
74  LAPACKE_sge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
75  }
76  /* Call LAPACK function and adjust info */
77  LAPACK_sstedc( &compz, &n, d, e, z_t, &ldz_t, work, &lwork, iwork,
78  &liwork, &info );
79  if( info < 0 ) {
80  info = info - 1;
81  }
82  /* Transpose output matrices */
83  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
84  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
85  }
86  /* Release memory and exit */
87  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
88  LAPACKE_free( z_t );
89  }
90 exit_level_0:
91  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
92  LAPACKE_xerbla( "LAPACKE_sstedc_work", info );
93  }
94  } else {
95  info = -1;
96  LAPACKE_xerbla( "LAPACKE_sstedc_work", info );
97  }
98  return info;
99 }
void LAPACK_sstedc(char *compz, lapack_int *n, float *d, float *e, float *z, lapack_int *ldz, float *work, lapack_int *lwork, lapack_int *iwork, lapack_int *liwork, lapack_int *info)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#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
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