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lapacke_dtrtrs_work.c File Reference
#include "lapacke_utils.h"

Go to the source code of this file.

Functions

lapack_int LAPACKE_dtrtrs_work (int matrix_layout, char uplo, char trans, char diag, lapack_int n, lapack_int nrhs, const double *a, lapack_int lda, double *b, lapack_int ldb)

Function Documentation

◆ LAPACKE_dtrtrs_work()

lapack_int LAPACKE_dtrtrs_work ( int matrix_layout,
char uplo,
char trans,
char diag,
lapack_int n,
lapack_int nrhs,
const double * a,
lapack_int lda,
double * b,
lapack_int ldb )

Definition at line 35 of file lapacke_dtrtrs_work.c.

39{
40 lapack_int info = 0;
41 if( matrix_layout == LAPACK_COL_MAJOR ) {
42 /* Call LAPACK function and adjust info */
43 LAPACK_dtrtrs( &uplo, &trans, &diag, &n, &nrhs, a, &lda, b, &ldb,
44 &info );
45 if( info < 0 ) {
46 info = info - 1;
47 }
48 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49 lapack_int lda_t = MAX(1,n);
50 lapack_int ldb_t = MAX(1,n);
51 double* a_t = NULL;
52 double* b_t = NULL;
53 /* Check leading dimension(s) */
54 if( lda < n ) {
55 info = -8;
56 LAPACKE_xerbla( "LAPACKE_dtrtrs_work", info );
57 return info;
58 }
59 if( ldb < nrhs ) {
60 info = -10;
61 LAPACKE_xerbla( "LAPACKE_dtrtrs_work", info );
62 return info;
63 }
64 /* Allocate memory for temporary array(s) */
65 a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
66 if( a_t == NULL ) {
68 goto exit_level_0;
69 }
70 b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
71 if( b_t == NULL ) {
73 goto exit_level_1;
74 }
75 /* Transpose input matrices */
76 LAPACKE_dtr_trans( matrix_layout, uplo, diag, n, a, lda, a_t, lda_t );
77 LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
78 /* Call LAPACK function and adjust info */
79 LAPACK_dtrtrs( &uplo, &trans, &diag, &n, &nrhs, a_t, &lda_t, b_t,
80 &ldb_t, &info );
81 if( info < 0 ) {
82 info = info - 1;
83 }
84 /* Transpose output matrices */
85 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
86 /* Release memory and exit */
87 LAPACKE_free( b_t );
88exit_level_1:
89 LAPACKE_free( a_t );
90exit_level_0:
91 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
92 LAPACKE_xerbla( "LAPACKE_dtrtrs_work", info );
93 }
94 } else {
95 info = -1;
96 LAPACKE_xerbla( "LAPACKE_dtrtrs_work", info );
97 }
98 return info;
99}
#define lapack_int
Definition lapack.h:83
#define LAPACK_dtrtrs(...)
Definition lapack.h:22082
#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)
void LAPACKE_dtr_trans(int matrix_layout, char uplo, char diag, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define MAX(x, y)
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
n