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2 Copyright (c) 2014, Intel Corp.
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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function zggsvd
30 * Author: Intel Corporation
31 *****************************************************************************/
32
33 #include "lapacke_utils.h"
34
LAPACKE_zggsvd_work(int matrix_layout,char jobu,char jobv,char jobq,lapack_int m,lapack_int n,lapack_int p,lapack_int * k,lapack_int * l,lapack_complex_double * a,lapack_int lda,lapack_complex_double * b,lapack_int ldb,double * alpha,double * beta,lapack_complex_double * u,lapack_int ldu,lapack_complex_double * v,lapack_int ldv,lapack_complex_double * q,lapack_int ldq,lapack_complex_double * work,double * rwork,lapack_int * iwork)35 lapack_int LAPACKE_zggsvd_work( int matrix_layout, char jobu, char jobv,
36 char jobq, lapack_int m, lapack_int n,
37 lapack_int p, lapack_int* k, lapack_int* l,
38 lapack_complex_double* a, lapack_int lda,
39 lapack_complex_double* b, lapack_int ldb,
40 double* alpha, double* beta,
41 lapack_complex_double* u, lapack_int ldu,
42 lapack_complex_double* v, lapack_int ldv,
43 lapack_complex_double* q, lapack_int ldq,
44 lapack_complex_double* work, double* rwork,
45 lapack_int* iwork )
46 {
47 lapack_int info = 0;
48 if( matrix_layout == LAPACK_COL_MAJOR ) {
49 /* Call LAPACK function and adjust info */
50 LAPACK_zggsvd( &jobu, &jobv, &jobq, &m, &n, &p, k, l, a, &lda, b, &ldb,
51 alpha, beta, u, &ldu, v, &ldv, q, &ldq, work, rwork,
52 iwork, &info );
53 if( info < 0 ) {
54 info = info - 1;
55 }
56 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
57 lapack_int lda_t = MAX(1,m);
58 lapack_int ldb_t = MAX(1,p);
59 lapack_int ldq_t = MAX(1,n);
60 lapack_int ldu_t = MAX(1,m);
61 lapack_int ldv_t = MAX(1,p);
62 lapack_complex_double* a_t = NULL;
63 lapack_complex_double* b_t = NULL;
64 lapack_complex_double* u_t = NULL;
65 lapack_complex_double* v_t = NULL;
66 lapack_complex_double* q_t = NULL;
67 /* Check leading dimension(s) */
68 if( lda < n ) {
69 info = -11;
70 LAPACKE_xerbla( "LAPACKE_zggsvd_work", info );
71 return info;
72 }
73 if( ldb < n ) {
74 info = -13;
75 LAPACKE_xerbla( "LAPACKE_zggsvd_work", info );
76 return info;
77 }
78 if( ldq < n ) {
79 info = -21;
80 LAPACKE_xerbla( "LAPACKE_zggsvd_work", info );
81 return info;
82 }
83 if( ldu < m ) {
84 info = -17;
85 LAPACKE_xerbla( "LAPACKE_zggsvd_work", info );
86 return info;
87 }
88 if( ldv < p ) {
89 info = -19;
90 LAPACKE_xerbla( "LAPACKE_zggsvd_work", info );
91 return info;
92 }
93 /* Allocate memory for temporary array(s) */
94 a_t = (lapack_complex_double*)
95 LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
96 if( a_t == NULL ) {
97 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
98 goto exit_level_0;
99 }
100 b_t = (lapack_complex_double*)
101 LAPACKE_malloc( sizeof(lapack_complex_double) * ldb_t * MAX(1,n) );
102 if( b_t == NULL ) {
103 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
104 goto exit_level_1;
105 }
106 if( LAPACKE_lsame( jobu, 'u' ) ) {
107 u_t = (lapack_complex_double*)
108 LAPACKE_malloc( sizeof(lapack_complex_double) *
109 ldu_t * MAX(1,m) );
110 if( u_t == NULL ) {
111 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
112 goto exit_level_2;
113 }
114 }
115 if( LAPACKE_lsame( jobv, 'v' ) ) {
116 v_t = (lapack_complex_double*)
117 LAPACKE_malloc( sizeof(lapack_complex_double) *
118 ldv_t * MAX(1,p) );
119 if( v_t == NULL ) {
120 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
121 goto exit_level_3;
122 }
123 }
124 if( LAPACKE_lsame( jobq, 'q' ) ) {
125 q_t = (lapack_complex_double*)
126 LAPACKE_malloc( sizeof(lapack_complex_double) *
127 ldq_t * MAX(1,n) );
128 if( q_t == NULL ) {
129 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
130 goto exit_level_4;
131 }
132 }
133 /* Transpose input matrices */
134 LAPACKE_zge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
135 LAPACKE_zge_trans( matrix_layout, p, n, b, ldb, b_t, ldb_t );
136 /* Call LAPACK function and adjust info */
137 LAPACK_zggsvd( &jobu, &jobv, &jobq, &m, &n, &p, k, l, a_t, &lda_t, b_t,
138 &ldb_t, alpha, beta, u_t, &ldu_t, v_t, &ldv_t, q_t,
139 &ldq_t, work, rwork, iwork, &info );
140 if( info < 0 ) {
141 info = info - 1;
142 }
143 /* Transpose output matrices */
144 LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
145 LAPACKE_zge_trans( LAPACK_COL_MAJOR, p, n, b_t, ldb_t, b, ldb );
146 if( LAPACKE_lsame( jobu, 'u' ) ) {
147 LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, m, u_t, ldu_t, u, ldu );
148 }
149 if( LAPACKE_lsame( jobv, 'v' ) ) {
150 LAPACKE_zge_trans( LAPACK_COL_MAJOR, p, p, v_t, ldv_t, v, ldv );
151 }
152 if( LAPACKE_lsame( jobq, 'q' ) ) {
153 LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
154 }
155 /* Release memory and exit */
156 if( LAPACKE_lsame( jobq, 'q' ) ) {
157 LAPACKE_free( q_t );
158 }
159 exit_level_4:
160 if( LAPACKE_lsame( jobv, 'v' ) ) {
161 LAPACKE_free( v_t );
162 }
163 exit_level_3:
164 if( LAPACKE_lsame( jobu, 'u' ) ) {
165 LAPACKE_free( u_t );
166 }
167 exit_level_2:
168 LAPACKE_free( b_t );
169 exit_level_1:
170 LAPACKE_free( a_t );
171 exit_level_0:
172 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
173 LAPACKE_xerbla( "LAPACKE_zggsvd_work", info );
174 }
175 } else {
176 info = -1;
177 LAPACKE_xerbla( "LAPACKE_zggsvd_work", info );
178 }
179 return info;
180 }
181