LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_sgesvd()

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

Definition at line 35 of file lapacke_sgesvd.c.

39{
40 lapack_int info = 0;
41 lapack_int lwork = -1;
42 float* work = NULL;
43 float work_query;
44 lapack_int i;
45 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46 LAPACKE_xerbla( "LAPACKE_sgesvd", -1 );
47 return -1;
48 }
49#ifndef LAPACK_DISABLE_NAN_CHECK
50 if( LAPACKE_get_nancheck() ) {
51 /* Optionally check input matrices for NaNs */
52 if( LAPACKE_sge_nancheck( matrix_layout, m, n, a, lda ) ) {
53 return -6;
54 }
55 }
56#endif
57 /* Query optimal working array(s) size */
58 info = LAPACKE_sgesvd_work( matrix_layout, jobu, jobvt, m, n, a, lda, s, u,
59 ldu, vt, ldvt, &work_query, lwork );
60 if( info != 0 ) {
61 goto exit_level_0;
62 }
63 lwork = (lapack_int)work_query;
64 /* Allocate memory for work arrays */
65 work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
66 if( work == NULL ) {
68 goto exit_level_0;
69 }
70 /* Call middle-level interface */
71 info = LAPACKE_sgesvd_work( matrix_layout, jobu, jobvt, m, n, a, lda, s, u,
72 ldu, vt, ldvt, work, lwork );
73 /* Backup significant data from working array(s) */
74 for( i=0; i<MIN(m,n)-1; i++ ) {
75 superb[i] = work[i+1];
76 }
77 /* Release memory and exit */
78 LAPACKE_free( work );
79exit_level_0:
80 if( info == LAPACK_WORK_MEMORY_ERROR ) {
81 LAPACKE_xerbla( "LAPACKE_sgesvd", info );
82 }
83 return info;
84}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
lapack_int LAPACKE_sgesvd_work(int matrix_layout, char jobu, char jobvt, lapack_int m, lapack_int n, float *a, lapack_int lda, float *s, float *u, lapack_int ldu, float *vt, lapack_int ldvt, float *work, lapack_int lwork)
#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)
lapack_logical LAPACKE_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
#define MIN(x, y)
Definition: lapacke_utils.h:49
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