LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_stgexc()

lapack_int LAPACKE_stgexc ( int  matrix_layout,
lapack_logical  wantq,
lapack_logical  wantz,
lapack_int  n,
float *  a,
lapack_int  lda,
float *  b,
lapack_int  ldb,
float *  q,
lapack_int  ldq,
float *  z,
lapack_int  ldz,
lapack_int ifst,
lapack_int ilst 
)

Definition at line 36 of file lapacke_stgexc.c.

41 {
42  lapack_int info = 0;
43  lapack_int lwork = -1;
44  float* work = NULL;
45  float work_query;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_stgexc", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_sge_nancheck( matrix_layout, n, n, a, lda ) ) {
53  return -5;
54  }
55  if( LAPACKE_sge_nancheck( matrix_layout, n, n, b, ldb ) ) {
56  return -7;
57  }
58  if( wantq ) {
59  if( LAPACKE_sge_nancheck( matrix_layout, n, n, q, ldq ) ) {
60  return -9;
61  }
62  }
63  if( wantz ) {
64  if( LAPACKE_sge_nancheck( matrix_layout, n, n, z, ldz ) ) {
65  return -11;
66  }
67  }
68 #endif
69  /* Query optimal working array(s) size */
70  info = LAPACKE_stgexc_work( matrix_layout, wantq, wantz, n, a, lda, b, ldb,
71  q, ldq, z, ldz, ifst, ilst, &work_query,
72  lwork );
73  if( info != 0 ) {
74  goto exit_level_0;
75  }
76  lwork = (lapack_int)work_query;
77  /* Allocate memory for work arrays */
78  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
79  if( work == NULL ) {
81  goto exit_level_0;
82  }
83  /* Call middle-level interface */
84  info = LAPACKE_stgexc_work( matrix_layout, wantq, wantz, n, a, lda, b, ldb,
85  q, ldq, z, ldz, ifst, ilst, work, lwork );
86  /* Release memory and exit */
87  LAPACKE_free( work );
88 exit_level_0:
89  if( info == LAPACK_WORK_MEMORY_ERROR ) {
90  LAPACKE_xerbla( "LAPACKE_stgexc", info );
91  }
92  return info;
93 }
#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_stgexc_work(int matrix_layout, lapack_logical wantq, lapack_logical wantz, lapack_int n, float *a, lapack_int lda, float *b, lapack_int ldb, float *q, lapack_int ldq, float *z, lapack_int ldz, lapack_int *ifst, lapack_int *ilst, float *work, lapack_int lwork)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#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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