LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_dgeqr2_work()

lapack_int LAPACKE_dgeqr2_work ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  tau,
double *  work 
)

Definition at line 35 of file lapacke_dgeqr2_work.c.

38{
39 lapack_int info = 0;
40 if( matrix_layout == LAPACK_COL_MAJOR ) {
41 /* Call LAPACK function and adjust info */
42 LAPACK_dgeqr2( &m, &n, a, &lda, tau, work, &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,m);
48 double* a_t = NULL;
49 /* Check leading dimension(s) */
50 if( lda < n ) {
51 info = -5;
52 LAPACKE_xerbla( "LAPACKE_dgeqr2_work", info );
53 return info;
54 }
55 /* Allocate memory for temporary array(s) */
56 a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
57 if( a_t == NULL ) {
59 goto exit_level_0;
60 }
61 /* Transpose input matrices */
62 LAPACKE_dge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
63 /* Call LAPACK function and adjust info */
64 LAPACK_dgeqr2( &m, &n, a_t, &lda_t, tau, work, &info );
65 if( info < 0 ) {
66 info = info - 1;
67 }
68 /* Transpose output matrices */
69 LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
70 /* Release memory and exit */
71 LAPACKE_free( a_t );
72exit_level_0:
73 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
74 LAPACKE_xerbla( "LAPACKE_dgeqr2_work", info );
75 }
76 } else {
77 info = -1;
78 LAPACKE_xerbla( "LAPACKE_dgeqr2_work", info );
79 }
80 return info;
81}
#define LAPACK_dgeqr2
Definition: lapack.h:2792
#define lapack_int
Definition: lapack.h:87
#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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