LAPACK  3.10.0 LAPACK: Linear Algebra PACKage

## ◆ LAPACKE_sgejsv()

 lapack_int LAPACKE_sgejsv ( int matrix_layout, char joba, char jobu, char jobv, char jobr, char jobt, char jobp, lapack_int m, lapack_int n, float * a, lapack_int lda, float * sva, float * u, lapack_int ldu, float * v, lapack_int ldv, float * stat, lapack_int * istat )

Definition at line 35 of file lapacke_sgejsv.c.

40 {
41  lapack_int info = 0;
42  lapack_int lwork = (!( LAPACKE_lsame( jobu, 'u' ) ||
43  LAPACKE_lsame( jobu, 'f' ) ||
44  LAPACKE_lsame( jobv, 'v' ) ||
45  LAPACKE_lsame( jobv, 'j' ) ||
46  LAPACKE_lsame( joba, 'e' ) ||
47  LAPACKE_lsame( joba, 'g' ) ) ? MAX3(7,4*n+1,2*m+n) :
48  ( (!( LAPACKE_lsame( jobu, 'u' ) ||
49  LAPACKE_lsame( jobu, 'f' ) ||
50  LAPACKE_lsame( jobv, 'v' ) ||
51  LAPACKE_lsame( jobv, 'j' ) ) &&
52  ( LAPACKE_lsame( joba, 'e' ) ||
53  LAPACKE_lsame( joba, 'g' ) ) ) ? MAX3(7,4*n+n*n,2*m+n) :
54  ( ( LAPACKE_lsame( jobu, 'u' ) ||
55  LAPACKE_lsame( jobu, 'f' ) ) &&
56  (!( LAPACKE_lsame( jobv, 'v' ) ||
57  LAPACKE_lsame( jobv, 'j' ) ) ) ? MAX(7,2*n+m) :
58  ( ( LAPACKE_lsame( jobv, 'v' ) ||
59  LAPACKE_lsame( jobv, 'j' ) ) &&
60  (!( LAPACKE_lsame( jobu, 'u' ) ||
61  LAPACKE_lsame( jobu, 'f' ) ) ) ? MAX(7,2*n+m) :
62  ( ( LAPACKE_lsame( jobu, 'u' ) ||
63  LAPACKE_lsame( jobu, 'f' ) ) &&
64  ( LAPACKE_lsame( jobv, 'v' ) ||
65  LAPACKE_lsame( jobv, 'j' ) ) &&
66  !LAPACKE_lsame( jobv, 'j' ) ? MAX(1,6*n+2*n*n) :
67  ( ( LAPACKE_lsame( jobu, 'u' ) ||
68  LAPACKE_lsame( jobu, 'f' ) ) &&
69  ( LAPACKE_lsame( jobv, 'v' ) ||
70  LAPACKE_lsame( jobv, 'j' ) ) &&
71  LAPACKE_lsame( jobv, 'j' ) ? MAX(7,m+3*n+n*n) :
72  7) ) ) ) ) );
73  lapack_int* iwork = NULL;
74  float* work = NULL;
75  lapack_int i;
76  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
77  LAPACKE_xerbla( "LAPACKE_sgejsv", -1 );
78  return -1;
79  }
80 #ifndef LAPACK_DISABLE_NAN_CHECK
81  if( LAPACKE_get_nancheck() ) {
82  /* Optionally check input matrices for NaNs */
83  if( LAPACKE_sge_nancheck( matrix_layout, m, n, a, lda ) ) {
84  return -10;
85  }
86  }
87 #endif
88  /* Allocate memory for working array(s) */
89  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(3,m+3*n) );
90  if( iwork == NULL ) {
92  goto exit_level_0;
93  }
94  lwork = MAX3( lwork, 7, 2*m+n );
95  { /* FIXUP LWORK */
96  int want_u = LAPACKE_lsame( jobu, 'u' ) || LAPACKE_lsame( jobu, 'f' );
97  int want_v = LAPACKE_lsame( jobv, 'v' ) || LAPACKE_lsame( jobv, 'j' );
98  int want_sce = LAPACKE_lsame( joba, 'e' ) || LAPACKE_lsame( joba, 'g' );
99  if( !want_u && !want_v && !want_sce ) lwork = MAX( lwork, 4*n+1 ); // 1.1
100  if( !want_u && !want_v && want_sce ) lwork = MAX( lwork, n*n+4*n ); // 1.2
101  if( !want_u && want_v ) lwork = MAX( lwork, 4*n+1 ); // 2
102  if( want_u && !want_v ) lwork = MAX( lwork, 4*n+1 ); // 3
103  if( want_u && LAPACKE_lsame( jobv, 'v' ) ) lwork = MAX( lwork, 6*n+2*n*n ); // 4.1
104  if( want_u && LAPACKE_lsame( jobv, 'j' ) ) lwork = MAX3( lwork, 4*n+n*n, 2*n+n*n+6 ); // 4.2
105  }
106  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
107  if( work == NULL ) {
109  goto exit_level_1;
110  }
111  /* Call middle-level interface */
112  info = LAPACKE_sgejsv_work( matrix_layout, joba, jobu, jobv, jobr, jobt,
113  jobp, m, n, a, lda, sva, u, ldu, v, ldv, work,
114  lwork, iwork );
115  /* Backup significant data from working array(s) */
116  for( i=0; i<7; i++ ) {
117  stat[i] = work[i];
118  }
119  for( i=0; i<3; i++ ) {
120  istat[i] = iwork[i];
121  }
122  /* Release memory and exit */
123  LAPACKE_free( work );
124 exit_level_1:
125  LAPACKE_free( iwork );
126 exit_level_0:
127  if( info == LAPACK_WORK_MEMORY_ERROR ) {
128  LAPACKE_xerbla( "LAPACKE_sgejsv", info );
129  }
130  return info;
131 }
#define lapack_int
Definition: lapack.h:83
#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
int LAPACKE_get_nancheck(void)
lapack_int LAPACKE_sgejsv_work(int matrix_layout, char joba, char jobu, char jobv, char jobr, char jobt, char jobp, lapack_int m, lapack_int n, float *a, lapack_int lda, float *sva, float *u, lapack_int ldu, float *v, lapack_int ldv, float *work, lapack_int lwork, lapack_int *iwork)
#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_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
#define MAX3(x, y, z)
Definition: lapacke_utils.h:52
#define MAX(x, y)
Definition: lapacke_utils.h:46
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