LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapacke_dsysvx_work.c
Go to the documentation of this file.
1 /*****************************************************************************
2  Copyright (c) 2014, Intel Corp.
3  All rights reserved.
4 
5  Redistribution and use in source and binary forms, with or without
6  modification, are permitted provided that the following conditions are met:
7 
8  * Redistributions of source code must retain the above copyright notice,
9  this list of conditions and the following disclaimer.
10  * Redistributions in binary form must reproduce the above copyright
11  notice, this list of conditions and the following disclaimer in the
12  documentation and/or other materials provided with the distribution.
13  * Neither the name of Intel Corporation nor the names of its contributors
14  may be used to endorse or promote products derived from this software
15  without specific prior written permission.
16 
17  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27  THE POSSIBILITY OF SUCH DAMAGE.
28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function dsysvx
30 * Author: Intel Corporation
31 * Generated November 2015
32 *****************************************************************************/
33 
34 #include "lapacke_utils.h"
35 
36 lapack_int LAPACKE_dsysvx_work( int matrix_layout, char fact, char uplo,
37  lapack_int n, lapack_int nrhs, const double* a,
38  lapack_int lda, double* af, lapack_int ldaf,
39  lapack_int* ipiv, const double* b,
40  lapack_int ldb, double* x, lapack_int ldx,
41  double* rcond, double* ferr, double* berr,
42  double* work, lapack_int lwork,
43  lapack_int* iwork )
44 {
45  lapack_int info = 0;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_dsysvx( &fact, &uplo, &n, &nrhs, a, &lda, af, &ldaf, ipiv, b,
49  &ldb, x, &ldx, rcond, ferr, berr, work, &lwork, iwork,
50  &info );
51  if( info < 0 ) {
52  info = info - 1;
53  }
54  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
55  lapack_int lda_t = MAX(1,n);
56  lapack_int ldaf_t = MAX(1,n);
57  lapack_int ldb_t = MAX(1,n);
58  lapack_int ldx_t = MAX(1,n);
59  double* a_t = NULL;
60  double* af_t = NULL;
61  double* b_t = NULL;
62  double* x_t = NULL;
63  /* Check leading dimension(s) */
64  if( lda < n ) {
65  info = -7;
66  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
67  return info;
68  }
69  if( ldaf < n ) {
70  info = -9;
71  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
72  return info;
73  }
74  if( ldb < nrhs ) {
75  info = -12;
76  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
77  return info;
78  }
79  if( ldx < nrhs ) {
80  info = -14;
81  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
82  return info;
83  }
84  /* Query optimal working array(s) size if requested */
85  if( lwork == -1 ) {
86  LAPACK_dsysvx( &fact, &uplo, &n, &nrhs, a, &lda_t, af, &ldaf_t,
87  ipiv, b, &ldb_t, x, &ldx_t, rcond, ferr, berr, work,
88  &lwork, iwork, &info );
89  return (info < 0) ? (info - 1) : info;
90  }
91  /* Allocate memory for temporary array(s) */
92  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
93  if( a_t == NULL ) {
95  goto exit_level_0;
96  }
97  af_t = (double*)LAPACKE_malloc( sizeof(double) * ldaf_t * MAX(1,n) );
98  if( af_t == NULL ) {
100  goto exit_level_1;
101  }
102  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
103  if( b_t == NULL ) {
105  goto exit_level_2;
106  }
107  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
108  if( x_t == NULL ) {
110  goto exit_level_3;
111  }
112  /* Transpose input matrices */
113  LAPACKE_dsy_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
114  if( LAPACKE_lsame( fact, 'f' ) ) {
115  LAPACKE_dsy_trans( matrix_layout, uplo, n, af, ldaf, af_t, ldaf_t );
116  }
117  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
118  /* Call LAPACK function and adjust info */
119  LAPACK_dsysvx( &fact, &uplo, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t,
120  ipiv, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr, berr, work,
121  &lwork, iwork, &info );
122  if( info < 0 ) {
123  info = info - 1;
124  }
125  /* Transpose output matrices */
126  if( LAPACKE_lsame( fact, 'n' ) ) {
127  LAPACKE_dsy_trans( LAPACK_COL_MAJOR, uplo, n, af_t, ldaf_t, af,
128  ldaf );
129  }
130  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
131  /* Release memory and exit */
132  LAPACKE_free( x_t );
133 exit_level_3:
134  LAPACKE_free( b_t );
135 exit_level_2:
136  LAPACKE_free( af_t );
137 exit_level_1:
138  LAPACKE_free( a_t );
139 exit_level_0:
140  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
141  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
142  }
143  } else {
144  info = -1;
145  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
146  }
147  return info;
148 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
lapack_int LAPACKE_dsysvx_work(int matrix_layout, char fact, char uplo, lapack_int n, lapack_int nrhs, const double *a, lapack_int lda, double *af, lapack_int ldaf, lapack_int *ipiv, const double *b, lapack_int ldb, double *x, lapack_int ldx, double *rcond, double *ferr, double *berr, double *work, lapack_int lwork, lapack_int *iwork)
void LAPACK_dsysvx(char *fact, char *uplo, lapack_int *n, lapack_int *nrhs, const double *a, lapack_int *lda, double *af, lapack_int *ldaf, lapack_int *ipiv, const double *b, lapack_int *ldb, double *x, lapack_int *ldx, double *rcond, double *ferr, double *berr, double *work, lapack_int *lwork, lapack_int *iwork, lapack_int *info)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
void LAPACKE_dsy_trans(int matrix_layout, char uplo, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123