LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_stgsna()

lapack_int LAPACKE_stgsna ( int  matrix_layout,
char  job,
char  howmny,
const lapack_logical select,
lapack_int  n,
const float *  a,
lapack_int  lda,
const float *  b,
lapack_int  ldb,
const float *  vl,
lapack_int  ldvl,
const float *  vr,
lapack_int  ldvr,
float *  s,
float *  dif,
lapack_int  mm,
lapack_int m 
)

Definition at line 36 of file lapacke_stgsna.c.

42 {
43  lapack_int info = 0;
44  lapack_int lwork = -1;
45  lapack_int* iwork = NULL;
46  float* work = NULL;
47  float work_query;
48  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49  LAPACKE_xerbla( "LAPACKE_stgsna", -1 );
50  return -1;
51  }
52 #ifndef LAPACK_DISABLE_NAN_CHECK
53  /* Optionally check input matrices for NaNs */
54  if( LAPACKE_sge_nancheck( matrix_layout, n, n, a, lda ) ) {
55  return -6;
56  }
57  if( LAPACKE_sge_nancheck( matrix_layout, n, n, b, ldb ) ) {
58  return -8;
59  }
60  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
61  if( LAPACKE_sge_nancheck( matrix_layout, n, mm, vl, ldvl ) ) {
62  return -10;
63  }
64  }
65  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
66  if( LAPACKE_sge_nancheck( matrix_layout, n, mm, vr, ldvr ) ) {
67  return -12;
68  }
69  }
70 #endif
71  /* Allocate memory for working array(s) */
72  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
73  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n+6) );
74  if( iwork == NULL ) {
76  goto exit_level_0;
77  }
78  }
79  /* Query optimal working array(s) size */
80  info = LAPACKE_stgsna_work( matrix_layout, job, howmny, select, n, a, lda, b,
81  ldb, vl, ldvl, vr, ldvr, s, dif, mm, m,
82  &work_query, lwork, iwork );
83  if( info != 0 ) {
84  goto exit_level_1;
85  }
86  lwork = (lapack_int)work_query;
87  /* Allocate memory for work arrays */
88  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
89  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
90  if( work == NULL ) {
92  goto exit_level_1;
93  }
94  }
95  /* Call middle-level interface */
96  info = LAPACKE_stgsna_work( matrix_layout, job, howmny, select, n, a, lda, b,
97  ldb, vl, ldvl, vr, ldvr, s, dif, mm, m, work,
98  lwork, iwork );
99  /* Release memory and exit */
100  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
101  LAPACKE_free( work );
102  }
103 exit_level_1:
104  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
105  LAPACKE_free( iwork );
106  }
107 exit_level_0:
108  if( info == LAPACK_WORK_MEMORY_ERROR ) {
109  LAPACKE_xerbla( "LAPACKE_stgsna", info );
110  }
111  return info;
112 }
#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_stgsna_work(int matrix_layout, char job, char howmny, const lapack_logical *select, lapack_int n, const float *a, lapack_int lda, const float *b, lapack_int ldb, const float *vl, lapack_int ldvl, const float *vr, lapack_int ldvr, float *s, float *dif, lapack_int mm, lapack_int *m, float *work, lapack_int lwork, lapack_int *iwork)
#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
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