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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 zhesvx
30 * Author: Intel Corporation
31 *****************************************************************************/
32
33 #include "lapacke_utils.h"
34
LAPACKE_zhesvx_work(int matrix_layout,char fact,char uplo,lapack_int n,lapack_int nrhs,const lapack_complex_double * a,lapack_int lda,lapack_complex_double * af,lapack_int ldaf,lapack_int * ipiv,const lapack_complex_double * b,lapack_int ldb,lapack_complex_double * x,lapack_int ldx,double * rcond,double * ferr,double * berr,lapack_complex_double * work,lapack_int lwork,double * rwork)35 lapack_int LAPACKE_zhesvx_work( int matrix_layout, char fact, char uplo,
36 lapack_int n, lapack_int nrhs,
37 const lapack_complex_double* a, lapack_int lda,
38 lapack_complex_double* af, lapack_int ldaf,
39 lapack_int* ipiv,
40 const lapack_complex_double* b, lapack_int ldb,
41 lapack_complex_double* x, lapack_int ldx,
42 double* rcond, double* ferr, double* berr,
43 lapack_complex_double* work, lapack_int lwork,
44 double* rwork )
45 {
46 lapack_int info = 0;
47 if( matrix_layout == LAPACK_COL_MAJOR ) {
48 /* Call LAPACK function and adjust info */
49 LAPACK_zhesvx( &fact, &uplo, &n, &nrhs, a, &lda, af, &ldaf, ipiv, b,
50 &ldb, x, &ldx, rcond, ferr, berr, work, &lwork, rwork,
51 &info );
52 if( info < 0 ) {
53 info = info - 1;
54 }
55 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
56 lapack_int lda_t = MAX(1,n);
57 lapack_int ldaf_t = MAX(1,n);
58 lapack_int ldb_t = MAX(1,n);
59 lapack_int ldx_t = MAX(1,n);
60 lapack_complex_double* a_t = NULL;
61 lapack_complex_double* af_t = NULL;
62 lapack_complex_double* b_t = NULL;
63 lapack_complex_double* x_t = NULL;
64 /* Check leading dimension(s) */
65 if( lda < n ) {
66 info = -7;
67 LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
68 return info;
69 }
70 if( ldaf < n ) {
71 info = -9;
72 LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
73 return info;
74 }
75 if( ldb < nrhs ) {
76 info = -12;
77 LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
78 return info;
79 }
80 if( ldx < nrhs ) {
81 info = -14;
82 LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
83 return info;
84 }
85 /* Query optimal working array(s) size if requested */
86 if( lwork == -1 ) {
87 LAPACK_zhesvx( &fact, &uplo, &n, &nrhs, a, &lda_t, af, &ldaf_t,
88 ipiv, b, &ldb_t, x, &ldx_t, rcond, ferr, berr, work,
89 &lwork, rwork, &info );
90 return (info < 0) ? (info - 1) : info;
91 }
92 /* Allocate memory for temporary array(s) */
93 a_t = (lapack_complex_double*)
94 LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
95 if( a_t == NULL ) {
96 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
97 goto exit_level_0;
98 }
99 af_t = (lapack_complex_double*)
100 LAPACKE_malloc( sizeof(lapack_complex_double) * ldaf_t * MAX(1,n) );
101 if( af_t == NULL ) {
102 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
103 goto exit_level_1;
104 }
105 b_t = (lapack_complex_double*)
106 LAPACKE_malloc( sizeof(lapack_complex_double) *
107 ldb_t * MAX(1,nrhs) );
108 if( b_t == NULL ) {
109 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
110 goto exit_level_2;
111 }
112 x_t = (lapack_complex_double*)
113 LAPACKE_malloc( sizeof(lapack_complex_double) *
114 ldx_t * MAX(1,nrhs) );
115 if( x_t == NULL ) {
116 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
117 goto exit_level_3;
118 }
119 /* Transpose input matrices */
120 LAPACKE_zhe_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
121 if( LAPACKE_lsame( fact, 'f' ) ) {
122 LAPACKE_zhe_trans( matrix_layout, uplo, n, af, ldaf, af_t, ldaf_t );
123 }
124 LAPACKE_zge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
125 /* Call LAPACK function and adjust info */
126 LAPACK_zhesvx( &fact, &uplo, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t,
127 ipiv, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr, berr, work,
128 &lwork, rwork, &info );
129 if( info < 0 ) {
130 info = info - 1;
131 }
132 /* Transpose output matrices */
133 if( LAPACKE_lsame( fact, 'n' ) ) {
134 LAPACKE_zhe_trans( LAPACK_COL_MAJOR, uplo, n, af_t, ldaf_t, af,
135 ldaf );
136 }
137 LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
138 /* Release memory and exit */
139 LAPACKE_free( x_t );
140 exit_level_3:
141 LAPACKE_free( b_t );
142 exit_level_2:
143 LAPACKE_free( af_t );
144 exit_level_1:
145 LAPACKE_free( a_t );
146 exit_level_0:
147 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
148 LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
149 }
150 } else {
151 info = -1;
152 LAPACKE_xerbla( "LAPACKE_zhesvx_work", info );
153 }
154 return info;
155 }
156