LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapacke_dgbsvx_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 dgbsvx
30 * Author: Intel Corporation
31 * Generated November 2015
32 *****************************************************************************/
33 
34 #include "lapacke_utils.h"
35 
36 lapack_int LAPACKE_dgbsvx_work( int matrix_layout, char fact, char trans,
38  lapack_int nrhs, double* ab, lapack_int ldab,
39  double* afb, lapack_int ldafb, lapack_int* ipiv,
40  char* equed, double* r, double* c, double* b,
41  lapack_int ldb, double* x, lapack_int ldx,
42  double* rcond, double* ferr, double* berr,
43  double* work, 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_dgbsvx( &fact, &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb,
49  &ldafb, ipiv, equed, r, c, b, &ldb, x, &ldx, rcond, ferr,
50  berr, work, iwork, &info );
51  if( info < 0 ) {
52  info = info - 1;
53  }
54  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
55  lapack_int ldab_t = MAX(1,kl+ku+1);
56  lapack_int ldafb_t = MAX(1,2*kl+ku+1);
57  lapack_int ldb_t = MAX(1,n);
58  lapack_int ldx_t = MAX(1,n);
59  double* ab_t = NULL;
60  double* afb_t = NULL;
61  double* b_t = NULL;
62  double* x_t = NULL;
63  /* Check leading dimension(s) */
64  if( ldab < n ) {
65  info = -9;
66  LAPACKE_xerbla( "LAPACKE_dgbsvx_work", info );
67  return info;
68  }
69  if( ldafb < n ) {
70  info = -11;
71  LAPACKE_xerbla( "LAPACKE_dgbsvx_work", info );
72  return info;
73  }
74  if( ldb < nrhs ) {
75  info = -17;
76  LAPACKE_xerbla( "LAPACKE_dgbsvx_work", info );
77  return info;
78  }
79  if( ldx < nrhs ) {
80  info = -19;
81  LAPACKE_xerbla( "LAPACKE_dgbsvx_work", info );
82  return info;
83  }
84  /* Allocate memory for temporary array(s) */
85  ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
86  if( ab_t == NULL ) {
88  goto exit_level_0;
89  }
90  afb_t = (double*)LAPACKE_malloc( sizeof(double) * ldafb_t * MAX(1,n) );
91  if( afb_t == NULL ) {
93  goto exit_level_1;
94  }
95  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
96  if( b_t == NULL ) {
98  goto exit_level_2;
99  }
100  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
101  if( x_t == NULL ) {
103  goto exit_level_3;
104  }
105  /* Transpose input matrices */
106  LAPACKE_dgb_trans( matrix_layout, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
107  if( LAPACKE_lsame( fact, 'f' ) ) {
108  LAPACKE_dgb_trans( matrix_layout, n, n, kl, kl+ku, afb, ldafb, afb_t,
109  ldafb_t );
110  }
111  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
112  /* Call LAPACK function and adjust info */
113  LAPACK_dgbsvx( &fact, &trans, &n, &kl, &ku, &nrhs, ab_t, &ldab_t, afb_t,
114  &ldafb_t, ipiv, equed, r, c, b_t, &ldb_t, x_t, &ldx_t,
115  rcond, ferr, berr, work, iwork, &info );
116  if( info < 0 ) {
117  info = info - 1;
118  }
119  /* Transpose output matrices */
120  if( LAPACKE_lsame( fact, 'e' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
121  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
122  LAPACKE_dgb_trans( LAPACK_COL_MAJOR, n, n, kl, ku, ab_t, ldab_t, ab,
123  ldab );
124  }
125  if( LAPACKE_lsame( fact, 'e' ) || LAPACKE_lsame( fact, 'n' ) ) {
126  LAPACKE_dgb_trans( LAPACK_COL_MAJOR, n, n, kl, kl+ku, afb_t,
127  ldafb_t, afb, ldafb );
128  }
129  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
130  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
131  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
132  }
133  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
134  /* Release memory and exit */
135  LAPACKE_free( x_t );
136 exit_level_3:
137  LAPACKE_free( b_t );
138 exit_level_2:
139  LAPACKE_free( afb_t );
140 exit_level_1:
141  LAPACKE_free( ab_t );
142 exit_level_0:
143  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
144  LAPACKE_xerbla( "LAPACKE_dgbsvx_work", info );
145  }
146  } else {
147  info = -1;
148  LAPACKE_xerbla( "LAPACKE_dgbsvx_work", info );
149  }
150  return info;
151 }
lapack_int LAPACKE_dgbsvx_work(int matrix_layout, char fact, char trans, lapack_int n, lapack_int kl, lapack_int ku, lapack_int nrhs, double *ab, lapack_int ldab, double *afb, lapack_int ldafb, 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)
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 LAPACKE_dgb_trans(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const double *in, lapack_int ldin, double *out, lapack_int ldout)
void LAPACK_dgbsvx(char *fact, char *trans, lapack_int *n, lapack_int *kl, lapack_int *ku, lapack_int *nrhs, double *ab, lapack_int *ldab, double *afb, lapack_int *ldafb, 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