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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function zgerfs
30 * Author: Intel Corporation
31 *****************************************************************************/
32
33 #include "lapacke_utils.h"
34
LAPACKE_zgerfs_work(int matrix_layout,char trans,lapack_int n,lapack_int nrhs,const lapack_complex_double * a,lapack_int lda,const lapack_complex_double * af,lapack_int ldaf,const lapack_int * ipiv,const lapack_complex_double * b,lapack_int ldb,lapack_complex_double * x,lapack_int ldx,double * ferr,double * berr,lapack_complex_double * work,double * rwork)35 lapack_int LAPACKE_zgerfs_work( int matrix_layout, char trans, lapack_int n,
36 lapack_int nrhs, const lapack_complex_double* a,
37 lapack_int lda, const lapack_complex_double* af,
38 lapack_int ldaf, const lapack_int* ipiv,
39 const lapack_complex_double* b, lapack_int ldb,
40 lapack_complex_double* x, lapack_int ldx,
41 double* ferr, double* berr,
42 lapack_complex_double* work, double* rwork )
43 {
44 lapack_int info = 0;
45 if( matrix_layout == LAPACK_COL_MAJOR ) {
46 /* Call LAPACK function and adjust info */
47 LAPACK_zgerfs( &trans, &n, &nrhs, a, &lda, af, &ldaf, ipiv, b, &ldb, x,
48 &ldx, ferr, berr, work, rwork, &info );
49 if( info < 0 ) {
50 info = info - 1;
51 }
52 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53 lapack_int lda_t = MAX(1,n);
54 lapack_int ldaf_t = MAX(1,n);
55 lapack_int ldb_t = MAX(1,n);
56 lapack_int ldx_t = MAX(1,n);
57 lapack_complex_double* a_t = NULL;
58 lapack_complex_double* af_t = NULL;
59 lapack_complex_double* b_t = NULL;
60 lapack_complex_double* x_t = NULL;
61 /* Check leading dimension(s) */
62 if( lda < n ) {
63 info = -6;
64 LAPACKE_xerbla( "LAPACKE_zgerfs_work", info );
65 return info;
66 }
67 if( ldaf < n ) {
68 info = -8;
69 LAPACKE_xerbla( "LAPACKE_zgerfs_work", info );
70 return info;
71 }
72 if( ldb < nrhs ) {
73 info = -11;
74 LAPACKE_xerbla( "LAPACKE_zgerfs_work", info );
75 return info;
76 }
77 if( ldx < nrhs ) {
78 info = -13;
79 LAPACKE_xerbla( "LAPACKE_zgerfs_work", info );
80 return info;
81 }
82 /* Allocate memory for temporary array(s) */
83 a_t = (lapack_complex_double*)
84 LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
85 if( a_t == NULL ) {
86 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
87 goto exit_level_0;
88 }
89 af_t = (lapack_complex_double*)
90 LAPACKE_malloc( sizeof(lapack_complex_double) * ldaf_t * MAX(1,n) );
91 if( af_t == NULL ) {
92 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
93 goto exit_level_1;
94 }
95 b_t = (lapack_complex_double*)
96 LAPACKE_malloc( sizeof(lapack_complex_double) *
97 ldb_t * MAX(1,nrhs) );
98 if( b_t == NULL ) {
99 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
100 goto exit_level_2;
101 }
102 x_t = (lapack_complex_double*)
103 LAPACKE_malloc( sizeof(lapack_complex_double) *
104 ldx_t * MAX(1,nrhs) );
105 if( x_t == NULL ) {
106 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
107 goto exit_level_3;
108 }
109 /* Transpose input matrices */
110 LAPACKE_zge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
111 LAPACKE_zge_trans( matrix_layout, n, n, af, ldaf, af_t, ldaf_t );
112 LAPACKE_zge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
113 LAPACKE_zge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
114 /* Call LAPACK function and adjust info */
115 LAPACK_zgerfs( &trans, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t, ipiv, b_t,
116 &ldb_t, x_t, &ldx_t, ferr, berr, work, rwork, &info );
117 if( info < 0 ) {
118 info = info - 1;
119 }
120 /* Transpose output matrices */
121 LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
122 /* Release memory and exit */
123 LAPACKE_free( x_t );
124 exit_level_3:
125 LAPACKE_free( b_t );
126 exit_level_2:
127 LAPACKE_free( af_t );
128 exit_level_1:
129 LAPACKE_free( a_t );
130 exit_level_0:
131 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
132 LAPACKE_xerbla( "LAPACKE_zgerfs_work", info );
133 }
134 } else {
135 info = -1;
136 LAPACKE_xerbla( "LAPACKE_zgerfs_work", info );
137 }
138 return info;
139 }
140