LAPACK  3.6.1 LAPACK: Linear Algebra PACKage
 lapack_int LAPACKE_zgelsy_work ( int matrix_layout, lapack_int m, lapack_int n, lapack_int nrhs, lapack_complex_double * a, lapack_int lda, lapack_complex_double * b, lapack_int ldb, lapack_int * jpvt, double rcond, lapack_int * rank, lapack_complex_double * work, lapack_int lwork, double * rwork )

Definition at line 36 of file lapacke_zgelsy_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_zgelsy( &m, &n, &nrhs, a, &lda, b, &ldb, jpvt, &rcond, rank,
47  work, &lwork, rwork, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int lda_t = MAX(1,m);
53  lapack_int ldb_t = MAX(1,MAX(m,n));
54  lapack_complex_double* a_t = NULL;
55  lapack_complex_double* b_t = NULL;
56  /* Check leading dimension(s) */
57  if( lda < n ) {
58  info = -6;
59  LAPACKE_xerbla( "LAPACKE_zgelsy_work", info );
60  return info;
61  }
62  if( ldb < nrhs ) {
63  info = -8;
64  LAPACKE_xerbla( "LAPACKE_zgelsy_work", info );
65  return info;
66  }
67  /* Query optimal working array(s) size if requested */
68  if( lwork == -1 ) {
69  LAPACK_zgelsy( &m, &n, &nrhs, a, &lda_t, b, &ldb_t, jpvt, &rcond,
70  rank, work, &lwork, rwork, &info );
71  return (info < 0) ? (info - 1) : info;
72  }
73  /* Allocate memory for temporary array(s) */
74  a_t = (lapack_complex_double*)
75  LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
76  if( a_t == NULL ) {
78  goto exit_level_0;
79  }
80  b_t = (lapack_complex_double*)
82  ldb_t * MAX(1,nrhs) );
83  if( b_t == NULL ) {
85  goto exit_level_1;
86  }
87  /* Transpose input matrices */
88  LAPACKE_zge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
89  LAPACKE_zge_trans( matrix_layout, MAX(m,n), nrhs, b, ldb, b_t, ldb_t );
90  /* Call LAPACK function and adjust info */
91  LAPACK_zgelsy( &m, &n, &nrhs, a_t, &lda_t, b_t, &ldb_t, jpvt, &rcond,
92  rank, work, &lwork, rwork, &info );
93  if( info < 0 ) {
94  info = info - 1;
95  }
96  /* Transpose output matrices */
97  LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
98  LAPACKE_zge_trans( LAPACK_COL_MAJOR, MAX(m,n), nrhs, b_t, ldb_t, b,
99  ldb );
100  /* Release memory and exit */
101  LAPACKE_free( b_t );
102 exit_level_1:
103  LAPACKE_free( a_t );
104 exit_level_0:
105  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
106  LAPACKE_xerbla( "LAPACKE_zgelsy_work", info );
107  }
108  } else {
109  info = -1;
110  LAPACKE_xerbla( "LAPACKE_zgelsy_work", info );
111  }
112  return info;
113 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define lapack_complex_double
Definition: lapacke.h:90
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
void LAPACK_zgelsy(lapack_int *m, lapack_int *n, lapack_int *nrhs, lapack_complex_double *a, lapack_int *lda, lapack_complex_double *b, lapack_int *ldb, lapack_int *jpvt, double *rcond, lapack_int *rank, lapack_complex_double *work, lapack_int *lwork, double *rwork, lapack_int *info)
#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
void LAPACKE_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)

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