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28 *****************************************************************************
29 * Contents: Native high-level C interface to LAPACK function sgejsv
30 * Author: Intel Corporation
31 *****************************************************************************/
32
33 #include "lapacke_utils.h"
34
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)35 lapack_int LAPACKE_sgejsv( int matrix_layout, char joba, char jobu, char jobv,
36 char jobr, char jobt, char jobp, lapack_int m,
37 lapack_int n, float* a, lapack_int lda, float* sva,
38 float* u, lapack_int ldu, float* v, lapack_int ldv,
39 float* stat, lapack_int* istat )
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 ) {
91 info = LAPACK_WORK_MEMORY_ERROR;
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 ) {
108 info = LAPACK_WORK_MEMORY_ERROR;
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 }
132