LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_cgesvd()

lapack_int LAPACKE_cgesvd ( int  matrix_layout,
char  jobu,
char  jobvt,
lapack_int  m,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float *  s,
lapack_complex_float u,
lapack_int  ldu,
lapack_complex_float vt,
lapack_int  ldvt,
float *  superb 
)

Definition at line 35 of file lapacke_cgesvd.c.

40{
41 lapack_int info = 0;
42 lapack_int lwork = -1;
43 float* rwork = NULL;
44 lapack_complex_float* work = NULL;
45 lapack_complex_float work_query;
46 lapack_int i;
47 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48 LAPACKE_xerbla( "LAPACKE_cgesvd", -1 );
49 return -1;
50 }
51#ifndef LAPACK_DISABLE_NAN_CHECK
52 if( LAPACKE_get_nancheck() ) {
53 /* Optionally check input matrices for NaNs */
54 if( LAPACKE_cge_nancheck( matrix_layout, m, n, a, lda ) ) {
55 return -6;
56 }
57 }
58#endif
59 /* Allocate memory for working array(s) */
60 rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,5*MIN(m,n)) );
61 if( rwork == NULL ) {
63 goto exit_level_0;
64 }
65 /* Query optimal working array(s) size */
66 info = LAPACKE_cgesvd_work( matrix_layout, jobu, jobvt, m, n, a, lda, s, u,
67 ldu, vt, ldvt, &work_query, lwork, rwork );
68 if( info != 0 ) {
69 goto exit_level_1;
70 }
71 lwork = LAPACK_C2INT( work_query );
72 /* Allocate memory for work arrays */
73 work = (lapack_complex_float*)
74 LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
75 if( work == NULL ) {
77 goto exit_level_1;
78 }
79 /* Call middle-level interface */
80 info = LAPACKE_cgesvd_work( matrix_layout, jobu, jobvt, m, n, a, lda, s, u,
81 ldu, vt, ldvt, work, lwork, rwork );
82 /* Backup significant data from working array(s) */
83 for( i=0; i<MIN(m,n)-1; i++ ) {
84 superb[i] = rwork[i];
85 }
86 /* Release memory and exit */
87 LAPACKE_free( work );
88exit_level_1:
89 LAPACKE_free( rwork );
90exit_level_0:
91 if( info == LAPACK_WORK_MEMORY_ERROR ) {
92 LAPACKE_xerbla( "LAPACKE_cgesvd", info );
93 }
94 return info;
95}
#define lapack_int
Definition: lapack.h:87
#define lapack_complex_float
Definition: lapack.h:46
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
lapack_int LAPACKE_cgesvd_work(int matrix_layout, char jobu, char jobvt, lapack_int m, lapack_int n, lapack_complex_float *a, lapack_int lda, float *s, lapack_complex_float *u, lapack_int ldu, lapack_complex_float *vt, lapack_int ldvt, lapack_complex_float *work, lapack_int lwork, float *rwork)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACK_C2INT(x)
Definition: lapacke.h:49
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MIN(x, y)
Definition: lapacke_utils.h:49
#define MAX(x, y)
Definition: lapacke_utils.h:46
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
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