LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgghrd_work()

lapack_int LAPACKE_dgghrd_work ( int  matrix_layout,
char  compq,
char  compz,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double *  q,
lapack_int  ldq,
double *  z,
lapack_int  ldz 
)

Definition at line 35 of file lapacke_dgghrd_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_dgghrd( &compq, &compz, &n, &ilo, &ihi, a, &lda, b, &ldb, q,
45  &ldq, z, &ldz, &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int lda_t = MAX(1,n);
51  lapack_int ldb_t = MAX(1,n);
52  lapack_int ldq_t = MAX(1,n);
53  lapack_int ldz_t = MAX(1,n);
54  double* a_t = NULL;
55  double* b_t = NULL;
56  double* q_t = NULL;
57  double* z_t = NULL;
58  /* Check leading dimension(s) */
59  if( lda < n ) {
60  info = -8;
61  LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
62  return info;
63  }
64  if( ldb < n ) {
65  info = -10;
66  LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
67  return info;
68  }
69  if( ldq < n ) {
70  info = -12;
71  LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
72  return info;
73  }
74  if( ldz < n ) {
75  info = -14;
76  LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
77  return info;
78  }
79  /* Allocate memory for temporary array(s) */
80  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
81  if( a_t == NULL ) {
83  goto exit_level_0;
84  }
85  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
86  if( b_t == NULL ) {
88  goto exit_level_1;
89  }
90  if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
91  q_t = (double*)LAPACKE_malloc( sizeof(double) * ldq_t * MAX(1,n) );
92  if( q_t == NULL ) {
94  goto exit_level_2;
95  }
96  }
97  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
98  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
99  if( z_t == NULL ) {
101  goto exit_level_3;
102  }
103  }
104  /* Transpose input matrices */
105  LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
106  LAPACKE_dge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
107  if( LAPACKE_lsame( compq, 'v' ) ) {
108  LAPACKE_dge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
109  }
110  if( LAPACKE_lsame( compz, 'v' ) ) {
111  LAPACKE_dge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
112  }
113  /* Call LAPACK function and adjust info */
114  LAPACK_dgghrd( &compq, &compz, &n, &ilo, &ihi, a_t, &lda_t, b_t, &ldb_t,
115  q_t, &ldq_t, z_t, &ldz_t, &info );
116  if( info < 0 ) {
117  info = info - 1;
118  }
119  /* Transpose output matrices */
120  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
121  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
122  if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
123  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
124  }
125  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
126  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
127  }
128  /* Release memory and exit */
129  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
130  LAPACKE_free( z_t );
131  }
132 exit_level_3:
133  if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
134  LAPACKE_free( q_t );
135  }
136 exit_level_2:
137  LAPACKE_free( b_t );
138 exit_level_1:
139  LAPACKE_free( a_t );
140 exit_level_0:
141  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
142  LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
143  }
144  } else {
145  info = -1;
146  LAPACKE_xerbla( "LAPACKE_dgghrd_work", info );
147  }
148  return info;
149 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dgghrd(...)
Definition: lapack.h:5103
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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