LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
Loading...
Searching...
No Matches

◆ LAPACKE_sgesvd_work()

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 
)

Definition at line 35 of file lapacke_sgesvd_work.c.

40{
41 lapack_int info = 0;
42 if( matrix_layout == LAPACK_COL_MAJOR ) {
43 /* Call LAPACK function and adjust info */
44 LAPACK_sgesvd( &jobu, &jobvt, &m, &n, a, &lda, s, u, &ldu, vt, &ldvt,
45 work, &lwork, &info );
46 if( info < 0 ) {
47 info = info - 1;
48 }
49 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50 lapack_int nrows_u = ( LAPACKE_lsame( jobu, 'a' ) ||
51 LAPACKE_lsame( jobu, 's' ) ) ? m : 1;
52 lapack_int ncols_u = LAPACKE_lsame( jobu, 'a' ) ? m :
53 ( LAPACKE_lsame( jobu, 's' ) ? MIN(m,n) : 1);
54 lapack_int nrows_vt = LAPACKE_lsame( jobvt, 'a' ) ? n :
55 ( LAPACKE_lsame( jobvt, 's' ) ? MIN(m,n) : 1);
56 lapack_int ncols_vt = ( LAPACKE_lsame( jobvt, 'a' ) ||
57 LAPACKE_lsame( jobvt, 's' ) ) ? n : 1;
58 lapack_int lda_t = MAX(1,m);
59 lapack_int ldu_t = MAX(1,nrows_u);
60 lapack_int ldvt_t = MAX(1,nrows_vt);
61 float* a_t = NULL;
62 float* u_t = NULL;
63 float* vt_t = NULL;
64 /* Check leading dimension(s) */
65 if( lda < n ) {
66 info = -7;
67 LAPACKE_xerbla( "LAPACKE_sgesvd_work", info );
68 return info;
69 }
70 if( ldu < ncols_u ) {
71 info = -10;
72 LAPACKE_xerbla( "LAPACKE_sgesvd_work", info );
73 return info;
74 }
75 if( ldvt < ncols_vt ) {
76 info = -12;
77 LAPACKE_xerbla( "LAPACKE_sgesvd_work", info );
78 return info;
79 }
80 /* Query optimal working array(s) size if requested */
81 if( lwork == -1 ) {
82 LAPACK_sgesvd( &jobu, &jobvt, &m, &n, a, &lda_t, s, u, &ldu_t, vt,
83 &ldvt_t, work, &lwork, &info );
84 return (info < 0) ? (info - 1) : info;
85 }
86 /* Allocate memory for temporary array(s) */
87 a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
88 if( a_t == NULL ) {
90 goto exit_level_0;
91 }
92 if( LAPACKE_lsame( jobu, 'a' ) || LAPACKE_lsame( jobu, 's' ) ) {
93 u_t = (float*)
94 LAPACKE_malloc( sizeof(float) * ldu_t * MAX(1,ncols_u) );
95 if( u_t == NULL ) {
97 goto exit_level_1;
98 }
99 }
100 if( LAPACKE_lsame( jobvt, 'a' ) || LAPACKE_lsame( jobvt, 's' ) ) {
101 vt_t = (float*)LAPACKE_malloc( sizeof(float) * ldvt_t * MAX(1,n) );
102 if( vt_t == NULL ) {
104 goto exit_level_2;
105 }
106 }
107 /* Transpose input matrices */
108 LAPACKE_sge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
109 /* Call LAPACK function and adjust info */
110 LAPACK_sgesvd( &jobu, &jobvt, &m, &n, a_t, &lda_t, s, u_t, &ldu_t, vt_t,
111 &ldvt_t, work, &lwork, &info );
112 if( info < 0 ) {
113 info = info - 1;
114 }
115 /* Transpose output matrices */
116 LAPACKE_sge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
117 if( LAPACKE_lsame( jobu, 'a' ) || LAPACKE_lsame( jobu, 's' ) ) {
118 LAPACKE_sge_trans( LAPACK_COL_MAJOR, nrows_u, ncols_u, u_t, ldu_t,
119 u, ldu );
120 }
121 if( LAPACKE_lsame( jobvt, 'a' ) || LAPACKE_lsame( jobvt, 's' ) ) {
122 LAPACKE_sge_trans( LAPACK_COL_MAJOR, nrows_vt, n, vt_t, ldvt_t, vt,
123 ldvt );
124 }
125 /* Release memory and exit */
126 if( LAPACKE_lsame( jobvt, 'a' ) || LAPACKE_lsame( jobvt, 's' ) ) {
127 LAPACKE_free( vt_t );
128 }
129exit_level_2:
130 if( LAPACKE_lsame( jobu, 'a' ) || LAPACKE_lsame( jobu, 's' ) ) {
131 LAPACKE_free( u_t );
132 }
133exit_level_1:
134 LAPACKE_free( a_t );
135exit_level_0:
136 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
137 LAPACKE_xerbla( "LAPACKE_sgesvd_work", info );
138 }
139 } else {
140 info = -1;
141 LAPACKE_xerbla( "LAPACKE_sgesvd_work", info );
142 }
143 return info;
144}
#define LAPACK_sgesvd(...)
Definition: lapack.h:3427
#define lapack_int
Definition: lapack.h:87
#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
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MIN(x, y)
Definition: lapacke_utils.h:49
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46
Here is the call graph for this function:
Here is the caller graph for this function: