LAPACK  3.10.1
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 35 of file lapacke_shseqr.c.

39 {
40  lapack_int info = 0;
41  lapack_int lwork = -1;
42  float* work = NULL;
43  float work_query;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_shseqr", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  if( LAPACKE_get_nancheck() ) {
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  }
60 #endif
61  /* Query optimal working array(s) size */
62  info = LAPACKE_shseqr_work( matrix_layout, job, compz, n, ilo, ihi, h, ldh,
63  wr, wi, z, ldz, &work_query, lwork );
64  if( info != 0 ) {
65  goto exit_level_0;
66  }
67  lwork = (lapack_int)work_query;
68  /* Allocate memory for work arrays */
69  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
70  if( work == NULL ) {
72  goto exit_level_0;
73  }
74  /* Call middle-level interface */
75  info = LAPACKE_shseqr_work( matrix_layout, job, compz, n, ilo, ihi, h, ldh,
76  wr, wi, z, ldz, work, lwork );
77  /* Release memory and exit */
78  LAPACKE_free( work );
79 exit_level_0:
80  if( info == LAPACK_WORK_MEMORY_ERROR ) {
81  LAPACKE_xerbla( "LAPACKE_shseqr", info );
82  }
83  return info;
84 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
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_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
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