LAPACK  3.10.0
LAPACK: Linear Algebra PACKage
lapacke_sgbsvx_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 sgbsvx
30 * Author: Intel Corporation
31 *****************************************************************************/
32 
33 #include "lapacke_utils.h"
34 
35 lapack_int LAPACKE_sgbsvx_work( int matrix_layout, char fact, char trans,
37  lapack_int nrhs, float* ab, lapack_int ldab,
38  float* afb, lapack_int ldafb, lapack_int* ipiv,
39  char* equed, float* r, float* c, float* b,
40  lapack_int ldb, float* x, lapack_int ldx,
41  float* rcond, float* ferr, float* berr,
42  float* 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_sgbsvx( &fact, &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb,
48  &ldafb, ipiv, equed, r, c, b, &ldb, x, &ldx, rcond, ferr,
49  berr, work, iwork, &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  lapack_int ldab_t = MAX(1,kl+ku+1);
55  lapack_int ldafb_t = MAX(1,2*kl+ku+1);
56  lapack_int ldb_t = MAX(1,n);
57  lapack_int ldx_t = MAX(1,n);
58  float* ab_t = NULL;
59  float* afb_t = NULL;
60  float* b_t = NULL;
61  float* x_t = NULL;
62  /* Check leading dimension(s) */
63  if( ldab < n ) {
64  info = -9;
65  LAPACKE_xerbla( "LAPACKE_sgbsvx_work", info );
66  return info;
67  }
68  if( ldafb < n ) {
69  info = -11;
70  LAPACKE_xerbla( "LAPACKE_sgbsvx_work", info );
71  return info;
72  }
73  if( ldb < nrhs ) {
74  info = -17;
75  LAPACKE_xerbla( "LAPACKE_sgbsvx_work", info );
76  return info;
77  }
78  if( ldx < nrhs ) {
79  info = -19;
80  LAPACKE_xerbla( "LAPACKE_sgbsvx_work", info );
81  return info;
82  }
83  /* Allocate memory for temporary array(s) */
84  ab_t = (float*)LAPACKE_malloc( sizeof(float) * ldab_t * MAX(1,n) );
85  if( ab_t == NULL ) {
87  goto exit_level_0;
88  }
89  afb_t = (float*)LAPACKE_malloc( sizeof(float) * ldafb_t * MAX(1,n) );
90  if( afb_t == NULL ) {
92  goto exit_level_1;
93  }
94  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
95  if( b_t == NULL ) {
97  goto exit_level_2;
98  }
99  x_t = (float*)LAPACKE_malloc( sizeof(float) * ldx_t * MAX(1,nrhs) );
100  if( x_t == NULL ) {
102  goto exit_level_3;
103  }
104  /* Transpose input matrices */
105  LAPACKE_sgb_trans( matrix_layout, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
106  if( LAPACKE_lsame( fact, 'f' ) ) {
107  LAPACKE_sgb_trans( matrix_layout, n, n, kl, kl+ku, afb, ldafb, afb_t,
108  ldafb_t );
109  }
110  LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
111  /* Call LAPACK function and adjust info */
112  LAPACK_sgbsvx( &fact, &trans, &n, &kl, &ku, &nrhs, ab_t, &ldab_t, afb_t,
113  &ldafb_t, ipiv, equed, r, c, b_t, &ldb_t, x_t, &ldx_t,
114  rcond, ferr, berr, work, iwork, &info );
115  if( info < 0 ) {
116  info = info - 1;
117  }
118  /* Transpose output matrices */
119  if( LAPACKE_lsame( fact, 'e' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
120  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
121  LAPACKE_sgb_trans( LAPACK_COL_MAJOR, n, n, kl, ku, ab_t, ldab_t, ab,
122  ldab );
123  }
124  if( LAPACKE_lsame( fact, 'e' ) || LAPACKE_lsame( fact, 'n' ) ) {
125  LAPACKE_sgb_trans( LAPACK_COL_MAJOR, n, n, kl, kl+ku, afb_t,
126  ldafb_t, afb, ldafb );
127  }
128  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
129  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
130  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
131  }
132  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
133  /* Release memory and exit */
134  LAPACKE_free( x_t );
135 exit_level_3:
136  LAPACKE_free( b_t );
137 exit_level_2:
138  LAPACKE_free( afb_t );
139 exit_level_1:
140  LAPACKE_free( ab_t );
141 exit_level_0:
142  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
143  LAPACKE_xerbla( "LAPACKE_sgbsvx_work", info );
144  }
145  } else {
146  info = -1;
147  LAPACKE_xerbla( "LAPACKE_sgbsvx_work", info );
148  }
149  return info;
150 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_sgbsvx(...)
Definition: lapack.h:1028
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
lapack_int LAPACKE_sgbsvx_work(int matrix_layout, char fact, char trans, lapack_int n, lapack_int kl, lapack_int ku, lapack_int nrhs, float *ab, lapack_int ldab, float *afb, lapack_int ldafb, lapack_int *ipiv, char *equed, float *r, float *c, float *b, lapack_int ldb, float *x, lapack_int ldx, float *rcond, float *ferr, float *berr, float *work, lapack_int *iwork)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
void LAPACKE_sgb_trans(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46