LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_dgesv_work()

lapack_int LAPACKE_dgesv_work ( int  matrix_layout,
lapack_int  n,
lapack_int  nrhs,
double *  a,
lapack_int  lda,
lapack_int ipiv,
double *  b,
lapack_int  ldb 
)

Definition at line 35 of file lapacke_dgesv_work.c.

38{
39 lapack_int info = 0;
40 if( matrix_layout == LAPACK_COL_MAJOR ) {
41 /* Call LAPACK function and adjust info */
42 LAPACK_dgesv( &n, &nrhs, a, &lda, ipiv, b, &ldb, &info );
43 if( info < 0 ) {
44 info = info - 1;
45 }
46 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
47 lapack_int lda_t = MAX(1,n);
48 lapack_int ldb_t = MAX(1,n);
49 double* a_t = NULL;
50 double* b_t = NULL;
51 /* Check leading dimension(s) */
52 if( lda < n ) {
53 info = -5;
54 LAPACKE_xerbla( "LAPACKE_dgesv_work", info );
55 return info;
56 }
57 if( ldb < nrhs ) {
58 info = -8;
59 LAPACKE_xerbla( "LAPACKE_dgesv_work", info );
60 return info;
61 }
62 /* Allocate memory for temporary array(s) */
63 a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
64 if( a_t == NULL ) {
66 goto exit_level_0;
67 }
68 b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
69 if( b_t == NULL ) {
71 goto exit_level_1;
72 }
73 /* Transpose input matrices */
74 LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
75 LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
76 /* Call LAPACK function and adjust info */
77 LAPACK_dgesv( &n, &nrhs, a_t, &lda_t, ipiv, b_t, &ldb_t, &info );
78 if( info < 0 ) {
79 info = info - 1;
80 }
81 /* Transpose output matrices */
82 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
83 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
84 /* Release memory and exit */
85 LAPACKE_free( b_t );
86exit_level_1:
87 LAPACKE_free( a_t );
88exit_level_0:
89 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
90 LAPACKE_xerbla( "LAPACKE_dgesv_work", info );
91 }
92 } else {
93 info = -1;
94 LAPACKE_xerbla( "LAPACKE_dgesv_work", info );
95 }
96 return info;
97}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_dgesv
Definition: lapack.h:3329
#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
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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