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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 sggev
30 * Author: Intel Corporation
31 *****************************************************************************/
32
33 #include "lapacke_utils.h"
34
LAPACKE_sggev_work(int matrix_layout,char jobvl,char jobvr,lapack_int n,float * a,lapack_int lda,float * b,lapack_int ldb,float * alphar,float * alphai,float * beta,float * vl,lapack_int ldvl,float * vr,lapack_int ldvr,float * work,lapack_int lwork)35 lapack_int LAPACKE_sggev_work( int matrix_layout, char jobvl, char jobvr,
36 lapack_int n, float* a, lapack_int lda, float* b,
37 lapack_int ldb, float* alphar, float* alphai,
38 float* beta, float* vl, lapack_int ldvl,
39 float* vr, lapack_int ldvr, float* work,
40 lapack_int lwork )
41 {
42 lapack_int info = 0;
43 if( matrix_layout == LAPACK_COL_MAJOR ) {
44 /* Call LAPACK function and adjust info */
45 LAPACK_sggev( &jobvl, &jobvr, &n, a, &lda, b, &ldb, alphar, alphai,
46 beta, vl, &ldvl, vr, &ldvr, work, &lwork, &info );
47 if( info < 0 ) {
48 info = info - 1;
49 }
50 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51 lapack_int nrows_vl = LAPACKE_lsame( jobvl, 'v' ) ? n : 1;
52 lapack_int ncols_vl = LAPACKE_lsame( jobvl, 'v' ) ? n : 1;
53 lapack_int nrows_vr = LAPACKE_lsame( jobvr, 'v' ) ? n : 1;
54 lapack_int ncols_vr = LAPACKE_lsame( jobvr, 'v' ) ? n : 1;
55 lapack_int lda_t = MAX(1,n);
56 lapack_int ldb_t = MAX(1,n);
57 lapack_int ldvl_t = MAX(1,nrows_vl);
58 lapack_int ldvr_t = MAX(1,nrows_vr);
59 float* a_t = NULL;
60 float* b_t = NULL;
61 float* vl_t = NULL;
62 float* vr_t = NULL;
63 /* Check leading dimension(s) */
64 if( lda < n ) {
65 info = -6;
66 LAPACKE_xerbla( "LAPACKE_sggev_work", info );
67 return info;
68 }
69 if( ldb < n ) {
70 info = -8;
71 LAPACKE_xerbla( "LAPACKE_sggev_work", info );
72 return info;
73 }
74 if( ldvl < ncols_vl ) {
75 info = -13;
76 LAPACKE_xerbla( "LAPACKE_sggev_work", info );
77 return info;
78 }
79 if( ldvr < ncols_vr ) {
80 info = -15;
81 LAPACKE_xerbla( "LAPACKE_sggev_work", info );
82 return info;
83 }
84 /* Query optimal working array(s) size if requested */
85 if( lwork == -1 ) {
86 LAPACK_sggev( &jobvl, &jobvr, &n, a, &lda_t, b, &ldb_t, alphar,
87 alphai, beta, vl, &ldvl_t, vr, &ldvr_t, work, &lwork,
88 &info );
89 return (info < 0) ? (info - 1) : info;
90 }
91 /* Allocate memory for temporary array(s) */
92 a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
93 if( a_t == NULL ) {
94 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
95 goto exit_level_0;
96 }
97 b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,n) );
98 if( b_t == NULL ) {
99 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
100 goto exit_level_1;
101 }
102 if( LAPACKE_lsame( jobvl, 'v' ) ) {
103 vl_t = (float*)
104 LAPACKE_malloc( sizeof(float) * ldvl_t * MAX(1,ncols_vl) );
105 if( vl_t == NULL ) {
106 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
107 goto exit_level_2;
108 }
109 }
110 if( LAPACKE_lsame( jobvr, 'v' ) ) {
111 vr_t = (float*)
112 LAPACKE_malloc( sizeof(float) * ldvr_t * MAX(1,ncols_vr) );
113 if( vr_t == NULL ) {
114 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
115 goto exit_level_3;
116 }
117 }
118 /* Transpose input matrices */
119 LAPACKE_sge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
120 LAPACKE_sge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
121 /* Call LAPACK function and adjust info */
122 LAPACK_sggev( &jobvl, &jobvr, &n, a_t, &lda_t, b_t, &ldb_t, alphar,
123 alphai, beta, vl_t, &ldvl_t, vr_t, &ldvr_t, work, &lwork,
124 &info );
125 if( info < 0 ) {
126 info = info - 1;
127 }
128 /* Transpose output matrices */
129 LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
130 LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
131 if( LAPACKE_lsame( jobvl, 'v' ) ) {
132 LAPACKE_sge_trans( LAPACK_COL_MAJOR, nrows_vl, ncols_vl, vl_t,
133 ldvl_t, vl, ldvl );
134 }
135 if( LAPACKE_lsame( jobvr, 'v' ) ) {
136 LAPACKE_sge_trans( LAPACK_COL_MAJOR, nrows_vr, ncols_vr, vr_t,
137 ldvr_t, vr, ldvr );
138 }
139 /* Release memory and exit */
140 if( LAPACKE_lsame( jobvr, 'v' ) ) {
141 LAPACKE_free( vr_t );
142 }
143 exit_level_3:
144 if( LAPACKE_lsame( jobvl, 'v' ) ) {
145 LAPACKE_free( vl_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_sggev_work", info );
154 }
155 } else {
156 info = -1;
157 LAPACKE_xerbla( "LAPACKE_sggev_work", info );
158 }
159 return info;
160 }
161