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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function zhpgvx
30 * Author: Intel Corporation
31 *****************************************************************************/
32
33 #include "lapacke_utils.h"
34
LAPACKE_zhpgvx_work(int matrix_layout,lapack_int itype,char jobz,char range,char uplo,lapack_int n,lapack_complex_double * ap,lapack_complex_double * bp,double vl,double vu,lapack_int il,lapack_int iu,double abstol,lapack_int * m,double * w,lapack_complex_double * z,lapack_int ldz,lapack_complex_double * work,double * rwork,lapack_int * iwork,lapack_int * ifail)35 lapack_int LAPACKE_zhpgvx_work( int matrix_layout, lapack_int itype, char jobz,
36 char range, char uplo, lapack_int n,
37 lapack_complex_double* ap,
38 lapack_complex_double* bp, double vl, double vu,
39 lapack_int il, lapack_int iu, double abstol,
40 lapack_int* m, double* w,
41 lapack_complex_double* z, lapack_int ldz,
42 lapack_complex_double* work, double* rwork,
43 lapack_int* iwork, lapack_int* ifail )
44 {
45 lapack_int info = 0;
46 if( matrix_layout == LAPACK_COL_MAJOR ) {
47 /* Call LAPACK function and adjust info */
48 LAPACK_zhpgvx( &itype, &jobz, &range, &uplo, &n, ap, bp, &vl, &vu, &il,
49 &iu, &abstol, m, w, z, &ldz, work, rwork, iwork, ifail,
50 &info );
51 if( info < 0 ) {
52 info = info - 1;
53 }
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 ldz_t = MAX(1,n);
59 lapack_complex_double* z_t = NULL;
60 lapack_complex_double* ap_t = NULL;
61 lapack_complex_double* bp_t = NULL;
62 /* Check leading dimension(s) */
63 if( ldz < ncols_z ) {
64 info = -17;
65 LAPACKE_xerbla( "LAPACKE_zhpgvx_work", info );
66 return info;
67 }
68 /* Allocate memory for temporary array(s) */
69 if( LAPACKE_lsame( jobz, 'v' ) ) {
70 z_t = (lapack_complex_double*)
71 LAPACKE_malloc( sizeof(lapack_complex_double) *
72 ldz_t * MAX(1,ncols_z) );
73 if( z_t == NULL ) {
74 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
75 goto exit_level_0;
76 }
77 }
78 ap_t = (lapack_complex_double*)
79 LAPACKE_malloc( sizeof(lapack_complex_double) *
80 ( MAX(1,n) * MAX(2,n+1) ) / 2 );
81 if( ap_t == NULL ) {
82 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
83 goto exit_level_1;
84 }
85 bp_t = (lapack_complex_double*)
86 LAPACKE_malloc( sizeof(lapack_complex_double) *
87 ( MAX(1,n) * MAX(2,n+1) ) / 2 );
88 if( bp_t == NULL ) {
89 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
90 goto exit_level_2;
91 }
92 /* Transpose input matrices */
93 LAPACKE_zhp_trans( matrix_layout, uplo, n, ap, ap_t );
94 LAPACKE_zhp_trans( matrix_layout, uplo, n, bp, bp_t );
95 /* Call LAPACK function and adjust info */
96 LAPACK_zhpgvx( &itype, &jobz, &range, &uplo, &n, ap_t, bp_t, &vl, &vu,
97 &il, &iu, &abstol, m, w, z_t, &ldz_t, work, rwork, iwork,
98 ifail, &info );
99 if( info < 0 ) {
100 info = info - 1;
101 }
102 /* Transpose output matrices */
103 if( LAPACKE_lsame( jobz, 'v' ) ) {
104 LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
105 ldz );
106 }
107 LAPACKE_zhp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
108 LAPACKE_zhp_trans( LAPACK_COL_MAJOR, uplo, n, bp_t, bp );
109 /* Release memory and exit */
110 LAPACKE_free( bp_t );
111 exit_level_2:
112 LAPACKE_free( ap_t );
113 exit_level_1:
114 if( LAPACKE_lsame( jobz, 'v' ) ) {
115 LAPACKE_free( z_t );
116 }
117 exit_level_0:
118 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
119 LAPACKE_xerbla( "LAPACKE_zhpgvx_work", info );
120 }
121 } else {
122 info = -1;
123 LAPACKE_xerbla( "LAPACKE_zhpgvx_work", info );
124 }
125 return info;
126 }
127