LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_dgesvx_work()

lapack_int LAPACKE_dgesvx_work ( int  matrix_layout,
char  fact,
char  trans,
lapack_int  n,
lapack_int  nrhs,
double *  a,
lapack_int  lda,
double *  af,
lapack_int  ldaf,
lapack_int *  ipiv,
char *  equed,
double *  r,
double *  c,
double *  b,
lapack_int  ldb,
double *  x,
lapack_int  ldx,
double *  rcond,
double *  ferr,
double *  berr,
double *  work,
lapack_int *  iwork 
)

Definition at line 35 of file lapacke_dgesvx_work.c.

42{
43 lapack_int info = 0;
44 if( matrix_layout == LAPACK_COL_MAJOR ) {
45 /* Call LAPACK function and adjust info */
46 LAPACK_dgesvx( &fact, &trans, &n, &nrhs, a, &lda, af, &ldaf, ipiv,
47 equed, r, c, 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 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 double* a_t = NULL;
58 double* af_t = NULL;
59 double* b_t = NULL;
60 double* x_t = NULL;
61 /* Check leading dimension(s) */
62 if( lda < n ) {
63 info = -7;
64 LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
65 return info;
66 }
67 if( ldaf < n ) {
68 info = -9;
69 LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
70 return info;
71 }
72 if( ldb < nrhs ) {
73 info = -15;
74 LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
75 return info;
76 }
77 if( ldx < nrhs ) {
78 info = -17;
79 LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
80 return info;
81 }
82 /* Allocate memory for temporary array(s) */
83 a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
84 if( a_t == NULL ) {
85 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
86 goto exit_level_0;
87 }
88 af_t = (double*)LAPACKE_malloc( sizeof(double) * ldaf_t * MAX(1,n) );
89 if( af_t == NULL ) {
90 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
91 goto exit_level_1;
92 }
93 b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
94 if( b_t == NULL ) {
95 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
96 goto exit_level_2;
97 }
98 x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
99 if( x_t == NULL ) {
100 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
101 goto exit_level_3;
102 }
103 /* Transpose input matrices */
104 LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
105 if( LAPACKE_lsame( fact, 'f' ) ) {
106 LAPACKE_dge_trans( matrix_layout, n, n, af, ldaf, af_t, ldaf_t );
107 }
108 LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
109 /* Call LAPACK function and adjust info */
110 LAPACK_dgesvx( &fact, &trans, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t,
111 ipiv, equed, r, c, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr,
112 berr, work, iwork, &info );
113 if( info < 0 ) {
114 info = info - 1;
115 }
116 /* Transpose output matrices */
117 if( LAPACKE_lsame( fact, 'e' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
118 LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
119 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
120 }
121 if( LAPACKE_lsame( fact, 'e' ) || LAPACKE_lsame( fact, 'n' ) ) {
122 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, af_t, ldaf_t, af, ldaf );
123 }
124 if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
125 LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
126 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
127 }
128 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
129 /* Release memory and exit */
130 LAPACKE_free( x_t );
131exit_level_3:
132 LAPACKE_free( b_t );
133exit_level_2:
134 LAPACKE_free( af_t );
135exit_level_1:
136 LAPACKE_free( a_t );
137exit_level_0:
138 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
139 LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
140 }
141 } else {
142 info = -1;
143 LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
144 }
145 return info;
146}
LAPACK_dgesvx
#define LAPACK_dgesvx(...)
Definition: lapack.h:3763
lapack_int
#define lapack_int
Definition: lapack.h:87
LAPACK_COL_MAJOR
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
LAPACKE_free
#define LAPACKE_free(p)
Definition: lapacke.h:46
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
LAPACKE_malloc
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
LAPACK_TRANSPOSE_MEMORY_ERROR
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
LAPACKE_lsame
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
LAPACKE_xerbla
void LAPACKE_xerbla(const char *name, lapack_int info)
Definition: lapacke_xerbla.c:36
MAX
#define MAX(x, y)
Definition: lapacke_utils.h:46
LAPACKE_dge_trans
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
Definition: lapacke_dge_trans.c:39
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