LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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lapacke_dpbsvx_work.c
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1/*****************************************************************************
2 Copyright (c) 2014, Intel Corp.
3 All rights reserved.
4
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6 modification, are permitted provided that the following conditions are met:
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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
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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
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28*****************************************************************************
29* Contents: Native middle-level C interface to LAPACK function dpbsvx
30* Author: Intel Corporation
31*****************************************************************************/
32
33#include "lapacke_utils.h"
34
35lapack_int LAPACKE_dpbsvx_work( int matrix_layout, char fact, char uplo,
37 double* ab, lapack_int ldab, double* afb,
38 lapack_int ldafb, char* equed, double* s,
39 double* b, lapack_int ldb, double* x,
40 lapack_int ldx, double* rcond, double* ferr,
41 double* berr, double* work, lapack_int* iwork )
42{
43 lapack_int info = 0;
44 if( matrix_layout == LAPACK_COL_MAJOR ) {
45 /* Call LAPACK function and adjust info */
46 LAPACK_dpbsvx( &fact, &uplo, &n, &kd, &nrhs, ab, &ldab, afb, &ldafb,
47 equed, s, b, &ldb, x, &ldx, rcond, ferr, berr, work,
48 iwork, &info );
49 if( info < 0 ) {
50 info = info - 1;
51 }
52 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53 lapack_int ldab_t = MAX(1,kd+1);
54 lapack_int ldafb_t = MAX(1,kd+1);
55 lapack_int ldb_t = MAX(1,n);
56 lapack_int ldx_t = MAX(1,n);
57 double* ab_t = NULL;
58 double* afb_t = NULL;
59 double* b_t = NULL;
60 double* x_t = NULL;
61 /* Check leading dimension(s) */
62 if( ldab < n ) {
63 info = -8;
64 LAPACKE_xerbla( "LAPACKE_dpbsvx_work", info );
65 return info;
66 }
67 if( ldafb < n ) {
68 info = -10;
69 LAPACKE_xerbla( "LAPACKE_dpbsvx_work", info );
70 return info;
71 }
72 if( ldb < nrhs ) {
73 info = -14;
74 LAPACKE_xerbla( "LAPACKE_dpbsvx_work", info );
75 return info;
76 }
77 if( ldx < nrhs ) {
78 info = -16;
79 LAPACKE_xerbla( "LAPACKE_dpbsvx_work", info );
80 return info;
81 }
82 /* Allocate memory for temporary array(s) */
83 ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
84 if( ab_t == NULL ) {
86 goto exit_level_0;
87 }
88 afb_t = (double*)LAPACKE_malloc( sizeof(double) * ldafb_t * MAX(1,n) );
89 if( afb_t == NULL ) {
91 goto exit_level_1;
92 }
93 b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
94 if( b_t == NULL ) {
96 goto exit_level_2;
97 }
98 x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
99 if( x_t == NULL ) {
101 goto exit_level_3;
102 }
103 /* Transpose input matrices */
104 LAPACKE_dpb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
105 if( LAPACKE_lsame( fact, 'f' ) ) {
106 LAPACKE_dpb_trans( matrix_layout, uplo, n, kd, afb, ldafb, afb_t,
107 ldafb_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_dpbsvx( &fact, &uplo, &n, &kd, &nrhs, ab_t, &ldab_t, afb_t,
112 &ldafb_t, equed, s, b_t, &ldb_t, x_t, &ldx_t, rcond,
113 ferr, 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, 'y' ) ) {
119 LAPACKE_dpb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
120 ldab );
121 }
122 if( LAPACKE_lsame( fact, 'e' ) || LAPACKE_lsame( fact, 'n' ) ) {
123 LAPACKE_dpb_trans( LAPACK_COL_MAJOR, uplo, n, kd, afb_t, ldafb_t,
124 afb, ldafb );
125 }
126 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
127 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
128 /* Release memory and exit */
129 LAPACKE_free( x_t );
130exit_level_3:
131 LAPACKE_free( b_t );
132exit_level_2:
133 LAPACKE_free( afb_t );
134exit_level_1:
135 LAPACKE_free( ab_t );
136exit_level_0:
137 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
138 LAPACKE_xerbla( "LAPACKE_dpbsvx_work", info );
139 }
140 } else {
141 info = -1;
142 LAPACKE_xerbla( "LAPACKE_dpbsvx_work", info );
143 }
144 return info;
145}
#define LAPACK_dpbsvx(...)
Definition: lapack.h:12247
#define lapack_int
Definition: lapack.h:87
#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_dpbsvx_work(int matrix_layout, char fact, char uplo, lapack_int n, lapack_int kd, lapack_int nrhs, double *ab, lapack_int ldab, double *afb, lapack_int ldafb, char *equed, double *s, double *b, lapack_int ldb, double *x, lapack_int ldx, double *rcond, double *ferr, double *berr, double *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)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dpb_trans(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const double *in, lapack_int ldin, double *out, lapack_int ldout)
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)