LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapacke_dgesvx_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 dgesvx
30 * Author: Intel Corporation
31 * Generated November 2015
32 *****************************************************************************/
33 
34 #include "lapacke_utils.h"
35 
36 lapack_int LAPACKE_dgesvx_work( int matrix_layout, char fact, char trans,
37  lapack_int n, lapack_int nrhs, double* a,
38  lapack_int lda, double* af, lapack_int ldaf,
39  lapack_int* ipiv, char* equed, double* r,
40  double* c, double* b, lapack_int ldb, double* x,
41  lapack_int ldx, double* rcond, double* ferr,
42  double* berr, double* work, lapack_int* iwork )
43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_dgesvx( &fact, &trans, &n, &nrhs, a, &lda, af, &ldaf, ipiv,
48  equed, r, c, b, &ldb, x, &ldx, rcond, ferr, berr, work,
49  iwork, &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  lapack_int lda_t = MAX(1,n);
55  lapack_int ldaf_t = MAX(1,n);
56  lapack_int ldb_t = MAX(1,n);
57  lapack_int ldx_t = MAX(1,n);
58  double* a_t = NULL;
59  double* af_t = NULL;
60  double* b_t = NULL;
61  double* x_t = NULL;
62  /* Check leading dimension(s) */
63  if( lda < n ) {
64  info = -7;
65  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
66  return info;
67  }
68  if( ldaf < n ) {
69  info = -9;
70  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
71  return info;
72  }
73  if( ldb < nrhs ) {
74  info = -15;
75  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
76  return info;
77  }
78  if( ldx < nrhs ) {
79  info = -17;
80  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
81  return info;
82  }
83  /* Allocate memory for temporary array(s) */
84  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
85  if( a_t == NULL ) {
87  goto exit_level_0;
88  }
89  af_t = (double*)LAPACKE_malloc( sizeof(double) * ldaf_t * MAX(1,n) );
90  if( af_t == NULL ) {
92  goto exit_level_1;
93  }
94  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
95  if( b_t == NULL ) {
97  goto exit_level_2;
98  }
99  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
100  if( x_t == NULL ) {
102  goto exit_level_3;
103  }
104  /* Transpose input matrices */
105  LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
106  if( LAPACKE_lsame( fact, 'f' ) ) {
107  LAPACKE_dge_trans( matrix_layout, n, n, af, ldaf, af_t, ldaf_t );
108  }
109  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
110  /* Call LAPACK function and adjust info */
111  LAPACK_dgesvx( &fact, &trans, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t,
112  ipiv, equed, r, c, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr,
113  berr, work, iwork, &info );
114  if( info < 0 ) {
115  info = info - 1;
116  }
117  /* Transpose output matrices */
118  if( LAPACKE_lsame( fact, 'e' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
119  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
120  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
121  }
122  if( LAPACKE_lsame( fact, 'e' ) || LAPACKE_lsame( fact, 'n' ) ) {
123  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, af_t, ldaf_t, af, ldaf );
124  }
125  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
126  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
127  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
128  }
129  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
130  /* Release memory and exit */
131  LAPACKE_free( x_t );
132 exit_level_3:
133  LAPACKE_free( b_t );
134 exit_level_2:
135  LAPACKE_free( af_t );
136 exit_level_1:
137  LAPACKE_free( a_t );
138 exit_level_0:
139  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
140  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
141  }
142  } else {
143  info = -1;
144  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
145  }
146  return info;
147 }
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
void LAPACK_dgesvx(char *fact, char *trans, lapack_int *n, lapack_int *nrhs, double *a, lapack_int *lda, double *af, lapack_int *ldaf, lapack_int *ipiv, char *equed, double *r, double *c, double *b, lapack_int *ldb, double *x, lapack_int *ldx, double *rcond, double *ferr, double *berr, double *work, 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
#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
lapack_int LAPACKE_dgesvx_work(int matrix_layout, char fact, char trans, lapack_int n, lapack_int nrhs, double *a, lapack_int lda, double *af, lapack_int ldaf, lapack_int *ipiv, char *equed, double *r, double *c, double *b, lapack_int ldb, double *x, lapack_int ldx, double *rcond, double *ferr, double *berr, double *work, lapack_int *iwork)