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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function chegvx
30 * Author: Intel Corporation
31 * Generated November 2015
32 *****************************************************************************/
34 #include "lapacke_utils.h"
36 lapack_int LAPACKE_chegvx_work( int matrix_layout, lapack_int itype, char jobz,
37 char range, char uplo, lapack_int n,
38 lapack_complex_float* a, lapack_int lda,
39 lapack_complex_float* b, lapack_int ldb,
40 float vl, float vu, lapack_int il,
41 lapack_int iu, float abstol, lapack_int* m,
42 float* w, lapack_complex_float* z,
43 lapack_int ldz, lapack_complex_float* work,
44 lapack_int lwork, float* rwork,
45 lapack_int* iwork, lapack_int* ifail )
48 if( matrix_layout == LAPACK_COL_MAJOR ) {
49 /* Call LAPACK function and adjust info */
50 LAPACK_chegvx( &itype, &jobz, &range, &uplo, &n, a, &lda, b, &ldb, &vl,
51 &vu, &il, &iu, &abstol, m, w, z, &ldz, work, &lwork,
52 rwork, iwork, ifail, &info );
56 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
57 lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
58 LAPACKE_lsame( range, 'v' ) ) ? n :
59 ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
60 lapack_int lda_t = MAX(1,n);
61 lapack_int ldb_t = MAX(1,n);
62 lapack_int ldz_t = MAX(1,n);
63 lapack_complex_float* a_t = NULL;
64 lapack_complex_float* b_t = NULL;
65 lapack_complex_float* z_t = NULL;
66 /* Check leading dimension(s) */
69 LAPACKE_xerbla( "LAPACKE_chegvx_work", info );
74 LAPACKE_xerbla( "LAPACKE_chegvx_work", info );
79 LAPACKE_xerbla( "LAPACKE_chegvx_work", info );
82 /* Query optimal working array(s) size if requested */
84 LAPACK_chegvx( &itype, &jobz, &range, &uplo, &n, a, &lda_t, b,
85 &ldb_t, &vl, &vu, &il, &iu, &abstol, m, w, z, &ldz_t,
86 work, &lwork, rwork, iwork, ifail, &info );
87 return (info < 0) ? (info - 1) : info;
89 /* Allocate memory for temporary array(s) */
90 a_t = (lapack_complex_float*)
91 LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
93 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
96 b_t = (lapack_complex_float*)
97 LAPACKE_malloc( sizeof(lapack_complex_float) * ldb_t * MAX(1,n) );
99 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
102 if( LAPACKE_lsame( jobz, 'v' ) ) {
103 z_t = (lapack_complex_float*)
104 LAPACKE_malloc( sizeof(lapack_complex_float) *
105 ldz_t * MAX(1,ncols_z) );
107 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
111 /* Transpose input matrices */
112 LAPACKE_che_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
113 LAPACKE_cge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
114 /* Call LAPACK function and adjust info */
115 LAPACK_chegvx( &itype, &jobz, &range, &uplo, &n, a_t, &lda_t, b_t,
116 &ldb_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
117 work, &lwork, rwork, iwork, ifail, &info );
121 /* Transpose output matrices */
122 LAPACKE_che_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
123 LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
124 if( LAPACKE_lsame( jobz, 'v' ) ) {
125 LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
128 /* Release memory and exit */
129 if( LAPACKE_lsame( jobz, 'v' ) ) {
137 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
138 LAPACKE_xerbla( "LAPACKE_chegvx_work", info );
142 LAPACKE_xerbla( "LAPACKE_chegvx_work", info );