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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function dsygvx
30 * Author: Intel Corporation
31 * Generated November 2015
32 *****************************************************************************/
34 #include "lapacke_utils.h"
36 lapack_int LAPACKE_dsygvx_work( int matrix_layout, lapack_int itype, char jobz,
37 char range, char uplo, lapack_int n, double* a,
38 lapack_int lda, double* b, lapack_int ldb,
39 double vl, double vu, lapack_int il,
40 lapack_int iu, double abstol, lapack_int* m,
41 double* w, double* z, lapack_int ldz,
42 double* work, lapack_int lwork,
43 lapack_int* iwork, lapack_int* ifail )
46 if( matrix_layout == LAPACK_COL_MAJOR ) {
47 /* Call LAPACK function and adjust info */
48 LAPACK_dsygvx( &itype, &jobz, &range, &uplo, &n, a, &lda, b, &ldb, &vl,
49 &vu, &il, &iu, &abstol, m, w, z, &ldz, work, &lwork,
50 iwork, ifail, &info );
54 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
55 lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
56 LAPACKE_lsame( range, 'v' ) ) ? n :
57 ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
58 lapack_int lda_t = MAX(1,n);
59 lapack_int ldb_t = MAX(1,n);
60 lapack_int ldz_t = MAX(1,n);
64 /* Check leading dimension(s) */
67 LAPACKE_xerbla( "LAPACKE_dsygvx_work", info );
72 LAPACKE_xerbla( "LAPACKE_dsygvx_work", info );
77 LAPACKE_xerbla( "LAPACKE_dsygvx_work", info );
80 /* Query optimal working array(s) size if requested */
82 LAPACK_dsygvx( &itype, &jobz, &range, &uplo, &n, a, &lda_t, b,
83 &ldb_t, &vl, &vu, &il, &iu, &abstol, m, w, z, &ldz_t,
84 work, &lwork, iwork, ifail, &info );
85 return (info < 0) ? (info - 1) : info;
87 /* Allocate memory for temporary array(s) */
88 a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
90 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
93 b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
95 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
98 if( LAPACKE_lsame( jobz, 'v' ) ) {
100 LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,ncols_z) );
102 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
106 /* Transpose input matrices */
107 LAPACKE_dsy_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
108 LAPACKE_dge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
109 /* Call LAPACK function and adjust info */
110 LAPACK_dsygvx( &itype, &jobz, &range, &uplo, &n, a_t, &lda_t, b_t,
111 &ldb_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
112 work, &lwork, iwork, ifail, &info );
116 /* Transpose output matrices */
117 LAPACKE_dsy_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
118 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
119 if( LAPACKE_lsame( jobz, 'v' ) ) {
120 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
123 /* Release memory and exit */
124 if( LAPACKE_lsame( jobz, 'v' ) ) {
132 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
133 LAPACKE_xerbla( "LAPACKE_dsygvx_work", info );
137 LAPACKE_xerbla( "LAPACKE_dsygvx_work", info );