LAPACK 3.11.0 LAPACK: Linear Algebra PACKage
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## ◆ LAPACKE_zgebrd_work()

 lapack_int LAPACKE_zgebrd_work ( int matrix_layout, lapack_int m, lapack_int n, lapack_complex_double * a, lapack_int lda, double * d, double * e, lapack_complex_double * tauq, lapack_complex_double * taup, lapack_complex_double * work, lapack_int lwork )

Definition at line 35 of file lapacke_zgebrd_work.c.

41{
42 lapack_int info = 0;
43 if( matrix_layout == LAPACK_COL_MAJOR ) {
44 /* Call LAPACK function and adjust info */
45 LAPACK_zgebrd( &m, &n, a, &lda, d, e, tauq, taup, work, &lwork, &info );
46 if( info < 0 ) {
47 info = info - 1;
48 }
49 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50 lapack_int lda_t = MAX(1,m);
51 lapack_complex_double* a_t = NULL;
52 /* Check leading dimension(s) */
53 if( lda < n ) {
54 info = -5;
55 LAPACKE_xerbla( "LAPACKE_zgebrd_work", info );
56 return info;
57 }
58 /* Query optimal working array(s) size if requested */
59 if( lwork == -1 ) {
60 LAPACK_zgebrd( &m, &n, a, &lda_t, d, e, tauq, taup, work, &lwork,
61 &info );
62 return (info < 0) ? (info - 1) : info;
63 }
64 /* Allocate memory for temporary array(s) */
66 LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
67 if( a_t == NULL ) {
69 goto exit_level_0;
70 }
71 /* Transpose input matrices */
72 LAPACKE_zge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
73 /* Call LAPACK function and adjust info */
74 LAPACK_zgebrd( &m, &n, a_t, &lda_t, d, e, tauq, taup, work, &lwork,
75 &info );
76 if( info < 0 ) {
77 info = info - 1;
78 }
79 /* Transpose output matrices */
80 LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
81 /* Release memory and exit */
82 LAPACKE_free( a_t );
83exit_level_0:
84 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
85 LAPACKE_xerbla( "LAPACKE_zgebrd_work", info );
86 }
87 } else {
88 info = -1;
89 LAPACKE_xerbla( "LAPACKE_zgebrd_work", info );
90 }
91 return info;
92}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_zgebrd
Definition: lapack.h:1457
#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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