LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_shseqr()

lapack_int LAPACKE_shseqr ( int  matrix_layout,
char  job,
char  compz,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
float *  h,
lapack_int  ldh,
float *  wr,
float *  wi,
float *  z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_shseqr.c.

40 {
41  lapack_int info = 0;
42  lapack_int lwork = -1;
43  float* work = NULL;
44  float work_query;
45  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46  LAPACKE_xerbla( "LAPACKE_shseqr", -1 );
47  return -1;
48  }
49 #ifndef LAPACK_DISABLE_NAN_CHECK
50  /* Optionally check input matrices for NaNs */
51  if( LAPACKE_sge_nancheck( matrix_layout, n, n, h, ldh ) ) {
52  return -7;
53  }
54  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
55  if( LAPACKE_sge_nancheck( matrix_layout, n, n, z, ldz ) ) {
56  return -11;
57  }
58  }
59 #endif
60  /* Query optimal working array(s) size */
61  info = LAPACKE_shseqr_work( matrix_layout, job, compz, n, ilo, ihi, h, ldh,
62  wr, wi, z, ldz, &work_query, lwork );
63  if( info != 0 ) {
64  goto exit_level_0;
65  }
66  lwork = (lapack_int)work_query;
67  /* Allocate memory for work arrays */
68  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
69  if( work == NULL ) {
71  goto exit_level_0;
72  }
73  /* Call middle-level interface */
74  info = LAPACKE_shseqr_work( matrix_layout, job, compz, n, ilo, ihi, h, ldh,
75  wr, wi, z, ldz, work, lwork );
76  /* Release memory and exit */
77  LAPACKE_free( work );
78 exit_level_0:
79  if( info == LAPACK_WORK_MEMORY_ERROR ) {
80  LAPACKE_xerbla( "LAPACKE_shseqr", info );
81  }
82  return info;
83 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
lapack_logical LAPACKE_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
lapack_int LAPACKE_shseqr_work(int matrix_layout, char job, char compz, lapack_int n, lapack_int ilo, lapack_int ihi, float *h, lapack_int ldh, float *wr, float *wi, float *z, lapack_int ldz, float *work, lapack_int lwork)
#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
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