LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_stgexc_work()

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 
)

Definition at line 36 of file lapacke_stgexc_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_stgexc( &wantq, &wantz, &n, a, &lda, b, &ldb, q, &ldq, z, &ldz,
48  ifst, ilst, work, &lwork, &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  lapack_int lda_t = MAX(1,n);
54  lapack_int ldb_t = MAX(1,n);
55  lapack_int ldq_t = MAX(1,n);
56  lapack_int ldz_t = MAX(1,n);
57  float* a_t = NULL;
58  float* b_t = NULL;
59  float* q_t = NULL;
60  float* z_t = NULL;
61  /* Check leading dimension(s) */
62  if( lda < n ) {
63  info = -6;
64  LAPACKE_xerbla( "LAPACKE_stgexc_work", info );
65  return info;
66  }
67  if( ldb < n ) {
68  info = -8;
69  LAPACKE_xerbla( "LAPACKE_stgexc_work", info );
70  return info;
71  }
72  if( ldq < n ) {
73  info = -10;
74  LAPACKE_xerbla( "LAPACKE_stgexc_work", info );
75  return info;
76  }
77  if( ldz < n ) {
78  info = -12;
79  LAPACKE_xerbla( "LAPACKE_stgexc_work", info );
80  return info;
81  }
82  /* Query optimal working array(s) size if requested */
83  if( lwork == -1 ) {
84  LAPACK_stgexc( &wantq, &wantz, &n, a, &lda_t, b, &ldb_t, q, &ldq_t,
85  z, &ldz_t, ifst, ilst, work, &lwork, &info );
86  return (info < 0) ? (info - 1) : info;
87  }
88  /* Allocate memory for temporary array(s) */
89  a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
90  if( a_t == NULL ) {
92  goto exit_level_0;
93  }
94  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,n) );
95  if( b_t == NULL ) {
97  goto exit_level_1;
98  }
99  if( wantq ) {
100  q_t = (float*)LAPACKE_malloc( sizeof(float) * ldq_t * MAX(1,n) );
101  if( q_t == NULL ) {
103  goto exit_level_2;
104  }
105  }
106  if( wantz ) {
107  z_t = (float*)LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,n) );
108  if( z_t == NULL ) {
110  goto exit_level_3;
111  }
112  }
113  /* Transpose input matrices */
114  LAPACKE_sge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
115  LAPACKE_sge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
116  if( wantq ) {
117  LAPACKE_sge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
118  }
119  if( wantz ) {
120  LAPACKE_sge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
121  }
122  /* Call LAPACK function and adjust info */
123  LAPACK_stgexc( &wantq, &wantz, &n, a_t, &lda_t, b_t, &ldb_t, q_t,
124  &ldq_t, z_t, &ldz_t, ifst, ilst, work, &lwork, &info );
125  if( info < 0 ) {
126  info = info - 1;
127  }
128  /* Transpose output matrices */
129  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
130  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
131  if( wantq ) {
132  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
133  }
134  if( wantz ) {
135  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
136  }
137  /* Release memory and exit */
138  if( wantz ) {
139  LAPACKE_free( z_t );
140  }
141 exit_level_3:
142  if( wantq ) {
143  LAPACKE_free( q_t );
144  }
145 exit_level_2:
146  LAPACKE_free( b_t );
147 exit_level_1:
148  LAPACKE_free( a_t );
149 exit_level_0:
150  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
151  LAPACKE_xerbla( "LAPACKE_stgexc_work", info );
152  }
153  } else {
154  info = -1;
155  LAPACKE_xerbla( "LAPACKE_stgexc_work", info );
156  }
157  return info;
158 }
void LAPACK_stgexc(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, 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
#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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