LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_sbdsdc()

lapack_int LAPACKE_sbdsdc ( int  matrix_layout,
char  uplo,
char  compq,
lapack_int  n,
float *  d,
float *  e,
float *  u,
lapack_int  ldu,
float *  vt,
lapack_int  ldvt,
float *  q,
lapack_int iq 
)

Definition at line 35 of file lapacke_sbdsdc.c.

39{
40 lapack_int info = 0;
41 /* Additional scalars declarations for work arrays */
42 size_t lwork;
43 lapack_int* iwork = NULL;
44 float* work = NULL;
45 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46 LAPACKE_xerbla( "LAPACKE_sbdsdc", -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_s_nancheck( n, d, 1 ) ) {
53 return -5;
54 }
55 if( LAPACKE_s_nancheck( n-1, e, 1 ) ) {
56 return -6;
57 }
58 }
59#endif
60 /* Additional scalars initializations for work arrays */
61 if( LAPACKE_lsame( compq, 'i' ) ) {
62 lwork = (size_t)3*MAX(1,n)*MAX(1,n)+4*MAX(1,n);
63 } else if( LAPACKE_lsame( compq, 'p' ) ) {
64 lwork = MAX(1,6*n);
65 } else if( LAPACKE_lsame( compq, 'n' ) ) {
66 lwork = MAX(1,4*n);
67 } else {
68 lwork = 1; /* Any value */
69 }
70 /* Allocate memory for working array(s) */
71 iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,8*n) );
72 if( iwork == NULL ) {
74 goto exit_level_0;
75 }
76 work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
77 if( work == NULL ) {
79 goto exit_level_1;
80 }
81 /* Call middle-level interface */
82 info = LAPACKE_sbdsdc_work( matrix_layout, uplo, compq, n, d, e, u, ldu, vt,
83 ldvt, q, iq, work, iwork );
84 /* Release memory and exit */
85 LAPACKE_free( work );
86exit_level_1:
87 LAPACKE_free( iwork );
88exit_level_0:
89 if( info == LAPACK_WORK_MEMORY_ERROR ) {
90 LAPACKE_xerbla( "LAPACKE_sbdsdc", info );
91 }
92 return info;
93}
#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
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
lapack_int LAPACKE_sbdsdc_work(int matrix_layout, char uplo, char compq, lapack_int n, float *d, float *e, float *u, lapack_int ldu, float *vt, lapack_int ldvt, float *q, lapack_int *iq, float *work, lapack_int *iwork)
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_s_nancheck(lapack_int n, const float *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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