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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 sgerfs
30 * Author: Intel Corporation
31 *****************************************************************************/
32
33 #include "lapacke_utils.h"
34
LAPACKE_sgerfs_work(int matrix_layout,char trans,lapack_int n,lapack_int nrhs,const float * a,lapack_int lda,const float * af,lapack_int ldaf,const lapack_int * ipiv,const float * b,lapack_int ldb,float * x,lapack_int ldx,float * ferr,float * berr,float * work,lapack_int * iwork)35 lapack_int LAPACKE_sgerfs_work( int matrix_layout, char trans, lapack_int n,
36 lapack_int nrhs, const float* a, lapack_int lda,
37 const float* af, lapack_int ldaf,
38 const lapack_int* ipiv, 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_sgerfs( &trans, &n, &nrhs, a, &lda, af, &ldaf, ipiv, b, &ldb, x,
47 &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 lda_t = MAX(1,n);
53 lapack_int ldaf_t = MAX(1,n);
54 lapack_int ldb_t = MAX(1,n);
55 lapack_int ldx_t = MAX(1,n);
56 float* a_t = NULL;
57 float* af_t = NULL;
58 float* b_t = NULL;
59 float* x_t = NULL;
60 /* Check leading dimension(s) */
61 if( lda < n ) {
62 info = -6;
63 LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
64 return info;
65 }
66 if( ldaf < n ) {
67 info = -8;
68 LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
69 return info;
70 }
71 if( ldb < nrhs ) {
72 info = -11;
73 LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
74 return info;
75 }
76 if( ldx < nrhs ) {
77 info = -13;
78 LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
79 return info;
80 }
81 /* Allocate memory for temporary array(s) */
82 a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
83 if( a_t == NULL ) {
84 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
85 goto exit_level_0;
86 }
87 af_t = (float*)LAPACKE_malloc( sizeof(float) * ldaf_t * MAX(1,n) );
88 if( af_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_sge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
104 LAPACKE_sge_trans( matrix_layout, n, n, af, ldaf, af_t, ldaf_t );
105 LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
106 LAPACKE_sge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
107 /* Call LAPACK function and adjust info */
108 LAPACK_sgerfs( &trans, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t, ipiv, b_t,
109 &ldb_t, x_t, &ldx_t, ferr, berr, work, iwork, &info );
110 if( info < 0 ) {
111 info = info - 1;
112 }
113 /* Transpose output matrices */
114 LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
115 /* Release memory and exit */
116 LAPACKE_free( x_t );
117 exit_level_3:
118 LAPACKE_free( b_t );
119 exit_level_2:
120 LAPACKE_free( af_t );
121 exit_level_1:
122 LAPACKE_free( a_t );
123 exit_level_0:
124 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
125 LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
126 }
127 } else {
128 info = -1;
129 LAPACKE_xerbla( "LAPACKE_sgerfs_work", info );
130 }
131 return info;
132 }
133