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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function zgghrd
30 * Author: Intel Corporation
31 *****************************************************************************/
32
33 #include "lapacke_utils.h"
34
LAPACKE_zgghrd_work(int matrix_layout,char compq,char compz,lapack_int n,lapack_int ilo,lapack_int ihi,lapack_complex_double * a,lapack_int lda,lapack_complex_double * b,lapack_int ldb,lapack_complex_double * q,lapack_int ldq,lapack_complex_double * z,lapack_int ldz)35 lapack_int LAPACKE_zgghrd_work( int matrix_layout, char compq, char compz,
36 lapack_int n, lapack_int ilo, lapack_int ihi,
37 lapack_complex_double* a, lapack_int lda,
38 lapack_complex_double* b, lapack_int ldb,
39 lapack_complex_double* q, lapack_int ldq,
40 lapack_complex_double* z, lapack_int ldz )
41 {
42 lapack_int info = 0;
43 if( matrix_layout == LAPACK_COL_MAJOR ) {
44 /* Call LAPACK function and adjust info */
45 LAPACK_zgghrd( &compq, &compz, &n, &ilo, &ihi, a, &lda, b, &ldb, q,
46 &ldq, z, &ldz, &info );
47 if( info < 0 ) {
48 info = info - 1;
49 }
50 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51 lapack_int lda_t = MAX(1,n);
52 lapack_int ldb_t = MAX(1,n);
53 lapack_int ldq_t = MAX(1,n);
54 lapack_int ldz_t = MAX(1,n);
55 lapack_complex_double* a_t = NULL;
56 lapack_complex_double* b_t = NULL;
57 lapack_complex_double* q_t = NULL;
58 lapack_complex_double* z_t = NULL;
59 /* Check leading dimension(s) */
60 if( lda < n ) {
61 info = -8;
62 LAPACKE_xerbla( "LAPACKE_zgghrd_work", info );
63 return info;
64 }
65 if( ldb < n ) {
66 info = -10;
67 LAPACKE_xerbla( "LAPACKE_zgghrd_work", info );
68 return info;
69 }
70 if( ldq < n ) {
71 info = -12;
72 LAPACKE_xerbla( "LAPACKE_zgghrd_work", info );
73 return info;
74 }
75 if( ldz < n ) {
76 info = -14;
77 LAPACKE_xerbla( "LAPACKE_zgghrd_work", info );
78 return info;
79 }
80 /* Allocate memory for temporary array(s) */
81 a_t = (lapack_complex_double*)
82 LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
83 if( a_t == NULL ) {
84 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
85 goto exit_level_0;
86 }
87 b_t = (lapack_complex_double*)
88 LAPACKE_malloc( sizeof(lapack_complex_double) * ldb_t * MAX(1,n) );
89 if( b_t == NULL ) {
90 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
91 goto exit_level_1;
92 }
93 if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
94 q_t = (lapack_complex_double*)
95 LAPACKE_malloc( sizeof(lapack_complex_double) *
96 ldq_t * MAX(1,n) );
97 if( q_t == NULL ) {
98 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
99 goto exit_level_2;
100 }
101 }
102 if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
103 z_t = (lapack_complex_double*)
104 LAPACKE_malloc( sizeof(lapack_complex_double) *
105 ldz_t * MAX(1,n) );
106 if( z_t == NULL ) {
107 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
108 goto exit_level_3;
109 }
110 }
111 /* Transpose input matrices */
112 LAPACKE_zge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
113 LAPACKE_zge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
114 if( LAPACKE_lsame( compq, 'v' ) ) {
115 LAPACKE_zge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
116 }
117 if( LAPACKE_lsame( compz, 'v' ) ) {
118 LAPACKE_zge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
119 }
120 /* Call LAPACK function and adjust info */
121 LAPACK_zgghrd( &compq, &compz, &n, &ilo, &ihi, a_t, &lda_t, b_t, &ldb_t,
122 q_t, &ldq_t, z_t, &ldz_t, &info );
123 if( info < 0 ) {
124 info = info - 1;
125 }
126 /* Transpose output matrices */
127 LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
128 LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
129 if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
130 LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
131 }
132 if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
133 LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
134 }
135 /* Release memory and exit */
136 if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
137 LAPACKE_free( z_t );
138 }
139 exit_level_3:
140 if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
141 LAPACKE_free( q_t );
142 }
143 exit_level_2:
144 LAPACKE_free( b_t );
145 exit_level_1:
146 LAPACKE_free( a_t );
147 exit_level_0:
148 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
149 LAPACKE_xerbla( "LAPACKE_zgghrd_work", info );
150 }
151 } else {
152 info = -1;
153 LAPACKE_xerbla( "LAPACKE_zgghrd_work", info );
154 }
155 return info;
156 }
157