LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgges_work()

lapack_int LAPACKE_dgges_work ( int  matrix_layout,
char  jobvsl,
char  jobvsr,
char  sort,
LAPACK_D_SELECT3  selctg,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
lapack_int sdim,
double *  alphar,
double *  alphai,
double *  beta,
double *  vsl,
lapack_int  ldvsl,
double *  vsr,
lapack_int  ldvsr,
double *  work,
lapack_int  lwork,
lapack_logical bwork 
)

Definition at line 36 of file lapacke_dgges_work.c.

44 {
45  lapack_int info = 0;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_dgges( &jobvsl, &jobvsr, &sort, selctg, &n, a, &lda, b, &ldb,
49  sdim, alphar, alphai, beta, vsl, &ldvsl, vsr, &ldvsr,
50  work, &lwork, bwork, &info );
51  if( info < 0 ) {
52  info = info - 1;
53  }
54  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
55  lapack_int lda_t = MAX(1,n);
56  lapack_int ldb_t = MAX(1,n);
57  lapack_int ldvsl_t = MAX(1,n);
58  lapack_int ldvsr_t = MAX(1,n);
59  double* a_t = NULL;
60  double* b_t = NULL;
61  double* vsl_t = NULL;
62  double* vsr_t = NULL;
63  /* Check leading dimension(s) */
64  if( lda < n ) {
65  info = -8;
66  LAPACKE_xerbla( "LAPACKE_dgges_work", info );
67  return info;
68  }
69  if( ldb < n ) {
70  info = -10;
71  LAPACKE_xerbla( "LAPACKE_dgges_work", info );
72  return info;
73  }
74  if( ldvsl < n ) {
75  info = -16;
76  LAPACKE_xerbla( "LAPACKE_dgges_work", info );
77  return info;
78  }
79  if( ldvsr < n ) {
80  info = -18;
81  LAPACKE_xerbla( "LAPACKE_dgges_work", info );
82  return info;
83  }
84  /* Query optimal working array(s) size if requested */
85  if( lwork == -1 ) {
86  LAPACK_dgges( &jobvsl, &jobvsr, &sort, selctg, &n, a, &lda_t, b,
87  &ldb_t, sdim, alphar, alphai, beta, vsl, &ldvsl_t,
88  vsr, &ldvsr_t, work, &lwork, bwork, &info );
89  return (info < 0) ? (info - 1) : info;
90  }
91  /* Allocate memory for temporary array(s) */
92  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
93  if( a_t == NULL ) {
95  goto exit_level_0;
96  }
97  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
98  if( b_t == NULL ) {
100  goto exit_level_1;
101  }
102  if( LAPACKE_lsame( jobvsl, 'v' ) ) {
103  vsl_t = (double*)
104  LAPACKE_malloc( sizeof(double) * ldvsl_t * MAX(1,n) );
105  if( vsl_t == NULL ) {
107  goto exit_level_2;
108  }
109  }
110  if( LAPACKE_lsame( jobvsr, 'v' ) ) {
111  vsr_t = (double*)
112  LAPACKE_malloc( sizeof(double) * ldvsr_t * MAX(1,n) );
113  if( vsr_t == NULL ) {
115  goto exit_level_3;
116  }
117  }
118  /* Transpose input matrices */
119  LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
120  LAPACKE_dge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
121  /* Call LAPACK function and adjust info */
122  LAPACK_dgges( &jobvsl, &jobvsr, &sort, selctg, &n, a_t, &lda_t, b_t,
123  &ldb_t, sdim, alphar, alphai, beta, vsl_t, &ldvsl_t,
124  vsr_t, &ldvsr_t, work, &lwork, bwork, &info );
125  if( info < 0 ) {
126  info = info - 1;
127  }
128  /* Transpose output matrices */
129  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
130  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
131  if( LAPACKE_lsame( jobvsl, 'v' ) ) {
132  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, vsl_t, ldvsl_t, vsl,
133  ldvsl );
134  }
135  if( LAPACKE_lsame( jobvsr, 'v' ) ) {
136  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, vsr_t, ldvsr_t, vsr,
137  ldvsr );
138  }
139  /* Release memory and exit */
140  if( LAPACKE_lsame( jobvsr, 'v' ) ) {
141  LAPACKE_free( vsr_t );
142  }
143 exit_level_3:
144  if( LAPACKE_lsame( jobvsl, 'v' ) ) {
145  LAPACKE_free( vsl_t );
146  }
147 exit_level_2:
148  LAPACKE_free( b_t );
149 exit_level_1:
150  LAPACKE_free( a_t );
151 exit_level_0:
152  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
153  LAPACKE_xerbla( "LAPACKE_dgges_work", info );
154  }
155  } else {
156  info = -1;
157  LAPACKE_xerbla( "LAPACKE_dgges_work", info );
158  }
159  return info;
160 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
void LAPACK_dgges(char *jobvsl, char *jobvsr, char *sort, LAPACK_D_SELECT3 selctg, lapack_int *n, double *a, lapack_int *lda, double *b, lapack_int *ldb, lapack_int *sdim, double *alphar, double *alphai, double *beta, double *vsl, lapack_int *ldvsl, double *vsr, lapack_int *ldvsr, double *work, lapack_int *lwork, lapack_logical *bwork, lapack_int *info)
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
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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