LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_dpptrs_work()

lapack_int LAPACKE_dpptrs_work ( int  matrix_layout,
char  uplo,
lapack_int  n,
lapack_int  nrhs,
const double *  ap,
double *  b,
lapack_int  ldb 
)

Definition at line 35 of file lapacke_dpptrs_work.c.

38{
39 lapack_int info = 0;
40 if( matrix_layout == LAPACK_COL_MAJOR ) {
41 /* Call LAPACK function and adjust info */
42 LAPACK_dpptrs( &uplo, &n, &nrhs, ap, b, &ldb, &info );
43 if( info < 0 ) {
44 info = info - 1;
45 }
46 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
47 lapack_int ldb_t = MAX(1,n);
48 double* b_t = NULL;
49 double* ap_t = NULL;
50 /* Check leading dimension(s) */
51 if( ldb < nrhs ) {
52 info = -7;
53 LAPACKE_xerbla( "LAPACKE_dpptrs_work", info );
54 return info;
55 }
56 /* Allocate memory for temporary array(s) */
57 b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
58 if( b_t == NULL ) {
60 goto exit_level_0;
61 }
62 ap_t = (double*)
63 LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
64 if( ap_t == NULL ) {
66 goto exit_level_1;
67 }
68 /* Transpose input matrices */
69 LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
70 LAPACKE_dpp_trans( matrix_layout, uplo, n, ap, ap_t );
71 /* Call LAPACK function and adjust info */
72 LAPACK_dpptrs( &uplo, &n, &nrhs, ap_t, b_t, &ldb_t, &info );
73 if( info < 0 ) {
74 info = info - 1;
75 }
76 /* Transpose output matrices */
77 LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
78 /* Release memory and exit */
79 LAPACKE_free( ap_t );
80exit_level_1:
81 LAPACKE_free( b_t );
82exit_level_0:
83 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
84 LAPACKE_xerbla( "LAPACKE_dpptrs_work", info );
85 }
86 } else {
87 info = -1;
88 LAPACKE_xerbla( "LAPACKE_dpptrs_work", info );
89 }
90 return info;
91}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_dpptrs(...)
Definition: lapack.h:14214
#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_dpp_trans(int matrix_layout, char uplo, lapack_int n, const double *in, double *out)
#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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