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2 Copyright (c) 2014, Intel Corp.
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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function spbrfs
30 * Author: Intel Corporation
31 *****************************************************************************/
32
33 #include "lapacke_utils.h"
34
LAPACKE_spbrfs_work(int matrix_layout,char uplo,lapack_int n,lapack_int kd,lapack_int nrhs,const float * ab,lapack_int ldab,const float * afb,lapack_int ldafb,const float * b,lapack_int ldb,float * x,lapack_int ldx,float * ferr,float * berr,float * work,lapack_int * iwork)35 lapack_int LAPACKE_spbrfs_work( int matrix_layout, char uplo, lapack_int n,
36 lapack_int kd, lapack_int nrhs, const float* ab,
37 lapack_int ldab, const float* afb,
38 lapack_int ldafb, const float* b,
39 lapack_int ldb, float* x, lapack_int ldx,
40 float* ferr, float* berr, float* work,
41 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_spbrfs( &uplo, &n, &kd, &nrhs, ab, &ldab, afb, &ldafb, b, &ldb,
47 x, &ldx, ferr, berr, work, iwork, &info );
48 if( info < 0 ) {
49 info = info - 1;
50 }
51 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52 lapack_int ldab_t = MAX(1,kd+1);
53 lapack_int ldafb_t = MAX(1,kd+1);
54 lapack_int ldb_t = MAX(1,n);
55 lapack_int ldx_t = MAX(1,n);
56 float* ab_t = NULL;
57 float* afb_t = NULL;
58 float* b_t = NULL;
59 float* x_t = NULL;
60 /* Check leading dimension(s) */
61 if( ldab < n ) {
62 info = -7;
63 LAPACKE_xerbla( "LAPACKE_spbrfs_work", info );
64 return info;
65 }
66 if( ldafb < n ) {
67 info = -9;
68 LAPACKE_xerbla( "LAPACKE_spbrfs_work", info );
69 return info;
70 }
71 if( ldb < nrhs ) {
72 info = -11;
73 LAPACKE_xerbla( "LAPACKE_spbrfs_work", info );
74 return info;
75 }
76 if( ldx < nrhs ) {
77 info = -13;
78 LAPACKE_xerbla( "LAPACKE_spbrfs_work", info );
79 return info;
80 }
81 /* Allocate memory for temporary array(s) */
82 ab_t = (float*)LAPACKE_malloc( sizeof(float) * ldab_t * MAX(1,n) );
83 if( ab_t == NULL ) {
84 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
85 goto exit_level_0;
86 }
87 afb_t = (float*)LAPACKE_malloc( sizeof(float) * ldafb_t * MAX(1,n) );
88 if( afb_t == NULL ) {
89 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
90 goto exit_level_1;
91 }
92 b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
93 if( b_t == NULL ) {
94 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
95 goto exit_level_2;
96 }
97 x_t = (float*)LAPACKE_malloc( sizeof(float) * ldx_t * MAX(1,nrhs) );
98 if( x_t == NULL ) {
99 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
100 goto exit_level_3;
101 }
102 /* Transpose input matrices */
103 LAPACKE_spb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
104 LAPACKE_spb_trans( matrix_layout, uplo, n, kd, afb, ldafb, afb_t,
105 ldafb_t );
106 LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
107 LAPACKE_sge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
108 /* Call LAPACK function and adjust info */
109 LAPACK_spbrfs( &uplo, &n, &kd, &nrhs, ab_t, &ldab_t, afb_t, &ldafb_t,
110 b_t, &ldb_t, x_t, &ldx_t, ferr, berr, work, iwork,
111 &info );
112 if( info < 0 ) {
113 info = info - 1;
114 }
115 /* Transpose output matrices */
116 LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
117 /* Release memory and exit */
118 LAPACKE_free( x_t );
119 exit_level_3:
120 LAPACKE_free( b_t );
121 exit_level_2:
122 LAPACKE_free( afb_t );
123 exit_level_1:
124 LAPACKE_free( ab_t );
125 exit_level_0:
126 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
127 LAPACKE_xerbla( "LAPACKE_spbrfs_work", info );
128 }
129 } else {
130 info = -1;
131 LAPACKE_xerbla( "LAPACKE_spbrfs_work", info );
132 }
133 return info;
134 }
135