LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_dtgsen_work()

lapack_int LAPACKE_dtgsen_work ( int  matrix_layout,
lapack_int  ijob,
lapack_logical  wantq,
lapack_logical  wantz,
const lapack_logical select,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double *  alphar,
double *  alphai,
double *  beta,
double *  q,
lapack_int  ldq,
double *  z,
lapack_int  ldz,
lapack_int m,
double *  pl,
double *  pr,
double *  dif,
double *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 35 of file lapacke_dtgsen_work.c.

45{
46 lapack_int info = 0;
47 if( matrix_layout == LAPACK_COL_MAJOR ) {
48 /* Call LAPACK function and adjust info */
49 LAPACK_dtgsen( &ijob, &wantq, &wantz, select, &n, a, &lda, b, &ldb,
50 alphar, alphai, beta, q, &ldq, z, &ldz, m, pl, pr, dif,
51 work, &lwork, iwork, &liwork, &info );
52 if( info < 0 ) {
53 info = info - 1;
54 }
55 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
56 lapack_int lda_t = MAX(1,n);
57 lapack_int ldb_t = MAX(1,n);
58 lapack_int ldq_t = MAX(1,n);
59 lapack_int ldz_t = MAX(1,n);
60 double* a_t = NULL;
61 double* b_t = NULL;
62 double* q_t = NULL;
63 double* z_t = NULL;
64 /* Check leading dimension(s) */
65 if( lda < n ) {
66 info = -8;
67 LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
68 return info;
69 }
70 if( ldb < n ) {
71 info = -10;
72 LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
73 return info;
74 }
75 if( ldq < n ) {
76 info = -15;
77 LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
78 return info;
79 }
80 if( ldz < n ) {
81 info = -17;
82 LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
83 return info;
84 }
85 /* Query optimal working array(s) size if requested */
86 if( liwork == -1 || lwork == -1 ) {
87 LAPACK_dtgsen( &ijob, &wantq, &wantz, select, &n, a, &lda_t, b,
88 &ldb_t, alphar, alphai, beta, q, &ldq_t, z, &ldz_t,
89 m, pl, pr, dif, work, &lwork, iwork, &liwork,
90 &info );
91 return (info < 0) ? (info - 1) : info;
92 }
93 /* Allocate memory for temporary array(s) */
94 a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
95 if( a_t == NULL ) {
97 goto exit_level_0;
98 }
99 b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
100 if( b_t == NULL ) {
102 goto exit_level_1;
103 }
104 if( wantq ) {
105 q_t = (double*)LAPACKE_malloc( sizeof(double) * ldq_t * MAX(1,n) );
106 if( q_t == NULL ) {
108 goto exit_level_2;
109 }
110 }
111 if( wantz ) {
112 z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
113 if( z_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 if( wantq ) {
122 LAPACKE_dge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
123 }
124 if( wantz ) {
125 LAPACKE_dge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
126 }
127 /* Call LAPACK function and adjust info */
128 LAPACK_dtgsen( &ijob, &wantq, &wantz, select, &n, a_t, &lda_t, b_t,
129 &ldb_t, alphar, alphai, beta, q_t, &ldq_t, z_t, &ldz_t,
130 m, pl, pr, dif, work, &lwork, iwork, &liwork, &info );
131 if( info < 0 ) {
132 info = info - 1;
133 }
134 /* Transpose output matrices */
135 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
136 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
137 if( wantq ) {
138 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
139 }
140 if( wantz ) {
141 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
142 }
143 /* Release memory and exit */
144 if( wantz ) {
145 LAPACKE_free( z_t );
146 }
147exit_level_3:
148 if( wantq ) {
149 LAPACKE_free( q_t );
150 }
151exit_level_2:
152 LAPACKE_free( b_t );
153exit_level_1:
154 LAPACKE_free( a_t );
155exit_level_0:
156 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
157 LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
158 }
159 } else {
160 info = -1;
161 LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
162 }
163 return info;
164}
#define LAPACK_dtgsen
Definition: lapack.h:20197
#define lapack_int
Definition: lapack.h:87
#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
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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