LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_zungqr_work()

lapack_int LAPACKE_zungqr_work ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
lapack_int  k,
lapack_complex_double a,
lapack_int  lda,
const lapack_complex_double tau,
lapack_complex_double work,
lapack_int  lwork 
)

Definition at line 35 of file lapacke_zungqr_work.c.

40{
41 lapack_int info = 0;
42 if( matrix_layout == LAPACK_COL_MAJOR ) {
43 /* Call LAPACK function and adjust info */
44 LAPACK_zungqr( &m, &n, &k, a, &lda, tau, work, &lwork, &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,m);
50 lapack_complex_double* a_t = NULL;
51 /* Check leading dimension(s) */
52 if( lda < n ) {
53 info = -6;
54 LAPACKE_xerbla( "LAPACKE_zungqr_work", info );
55 return info;
56 }
57 /* Query optimal working array(s) size if requested */
58 if( lwork == -1 ) {
59 LAPACK_zungqr( &m, &n, &k, a, &lda_t, tau, work, &lwork, &info );
60 return (info < 0) ? (info - 1) : info;
61 }
62 /* Allocate memory for temporary array(s) */
64 LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
65 if( a_t == NULL ) {
67 goto exit_level_0;
68 }
69 /* Transpose input matrices */
70 LAPACKE_zge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
71 /* Call LAPACK function and adjust info */
72 LAPACK_zungqr( &m, &n, &k, a_t, &lda_t, tau, work, &lwork, &info );
73 if( info < 0 ) {
74 info = info - 1;
75 }
76 /* Transpose output matrices */
77 LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
78 /* Release memory and exit */
79 LAPACKE_free( a_t );
80exit_level_0:
81 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
82 LAPACKE_xerbla( "LAPACKE_zungqr_work", info );
83 }
84 } else {
85 info = -1;
86 LAPACKE_xerbla( "LAPACKE_zungqr_work", info );
87 }
88 return info;
89}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_zungqr
Definition: lapack.h:22629
#define lapack_complex_double
Definition: lapack.h:64
#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_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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