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Functions
FLA_Bidiag_UT_form_U_ext.c File Reference

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Functions

FLA_Error FLA_Bidiag_UT_form_U_ext (FLA_Uplo uplo, FLA_Obj A, FLA_Obj T, FLA_Trans transu, FLA_Obj U)
 

Function Documentation

◆ FLA_Bidiag_UT_form_U_ext()

FLA_Error FLA_Bidiag_UT_form_U_ext ( FLA_Uplo  uplo,
FLA_Obj  A,
FLA_Obj  T,
FLA_Trans  transu,
FLA_Obj  U 
)
15{
16 //if ( FLA_Check_error_level() >= FLA_MIN_ERROR_CHECKING )
17 // FLA_Bidiag_UT_form_U_ext_check( uplo, A, T, transu, U );
18
19 if ( transu == FLA_NO_TRANSPOSE ||
21 {
22
23 if ( uplo == FLA_UPPER_TRIANGULAR )
24 {
25 FLA_QR_UT_form_Q( A, T, U );
26 }
27 else // if ( uplo == FLA_LOWER_TRIANGULAR )
28 {
30 ABL, ABR;
31
33 UBL, UBR;
34
35 FLA_Obj TL, TR;
36
37 dim_t b = ( FLA_Obj_length( A ) - 1 );
38
39 FLA_Part_1x2( T, &TL, &TR, 1, FLA_RIGHT );
40 FLA_Part_2x2( U, &UTL, &UTR,
41 &UBL, &UBR, 1, 1, FLA_TL );
42
43 if ( FLA_Obj_is( A, U ) == FALSE )
44 {
47
48 FLA_Part_2x2( A, &ATL, &ATR,
49 &ABL, &ABR, 1, b, FLA_TL );
50
52 }
53 else
54 {
55 FLA_Obj p, pt, pb;
56 FLA_Part_2x2( A, &ATL, &ATR,
57 &ABL, &ABR, 1, b+1, FLA_TL );
58
59 FLA_Obj_create( FLA_INT, b+1,1, 0, 0, &p );
60 FLA_Part_2x1( p, &pt,
61 &pb, 1, FLA_BOTTOM );
62 FLA_Set( FLA_ONE, pt );
65 FLA_Obj_free(&p );
66
70
72 &ABR, 1, FLA_LEFT );
73
75 }
76 }
77 }
78 else
79 {
82
85
86 // A and U should have different base objects
89
91
92 // As we use QR and LQ for constructing U and V,
93 // conjugation naturally fits there.
94 // Never apply conjugation separately here even if flipping trick is applied.
95 //FLA_Conjugate( U );
96 }
97
98 return FLA_SUCCESS;
99}
FLA_Error FLA_Bidiag_UT_form_V_ext(FLA_Uplo uplo, FLA_Obj A, FLA_Obj S, FLA_Trans transv, FLA_Obj V)
Definition FLA_Bidiag_UT_form_V_ext.c:13
FLA_Error FLA_QR_UT_form_Q(FLA_Obj A, FLA_Obj T, FLA_Obj Q)
Definition FLA_QR_UT_form_Q.c:13
FLA_Obj FLA_ZERO
Definition FLA_Init.c:20
FLA_Obj FLA_ONE
Definition FLA_Init.c:18
FLA_Error FLA_Apply_pivots(FLA_Side side, FLA_Trans trans, FLA_Obj p, FLA_Obj A)
Definition FLA_Apply_pivots.c:15
FLA_Error FLA_Part_2x2(FLA_Obj A, FLA_Obj *A11, FLA_Obj *A12, FLA_Obj *A21, FLA_Obj *A22, dim_t mb, dim_t nb, FLA_Quadrant quadrant)
Definition FLA_View.c:17
FLA_Error FLA_Obj_flip_view(FLA_Obj *obj)
Definition FLA_Obj.c:669
FLA_Error FLA_Obj_flip_base(FLA_Obj *obj)
Definition FLA_Obj.c:647
FLA_Error FLA_Obj_create(FLA_Datatype datatype, dim_t m, dim_t n, dim_t rs, dim_t cs, FLA_Obj *obj)
Definition FLA_Obj.c:55
FLA_Error FLA_Part_1x2(FLA_Obj A, FLA_Obj *A1, FLA_Obj *A2, dim_t nb, FLA_Side side)
Definition FLA_View.c:110
FLA_Error FLA_Part_2x1(FLA_Obj A, FLA_Obj *A1, FLA_Obj *A2, dim_t mb, FLA_Side side)
Definition FLA_View.c:76
dim_t FLA_Obj_length(FLA_Obj obj)
Definition FLA_Query.c:116
FLA_Bool FLA_Obj_is(FLA_Obj A, FLA_Obj B)
Definition FLA_Query.c:460
FLA_Error FLA_Obj_free(FLA_Obj *obj)
Definition FLA_Obj.c:588
unsigned long dim_t
Definition FLA_type_defs.h:71
int FLA_Uplo
Definition FLA_type_defs.h:52
FLA_Error FLA_Set(FLA_Obj alpha, FLA_Obj A)
Definition FLA_Set.c:13
int i
Definition bl1_axmyv2.c:145
Definition FLA_type_defs.h:159

References FLA_Apply_pivots(), FLA_Bidiag_UT_form_V_ext(), FLA_Obj_create(), FLA_Obj_flip_base(), FLA_Obj_flip_view(), FLA_Obj_free(), FLA_Obj_is(), FLA_Obj_length(), FLA_ONE, FLA_Part_1x2(), FLA_Part_2x1(), FLA_Part_2x2(), FLA_QR_UT_form_Q(), FLA_Set(), FLA_ZERO, and i.

Referenced by FLA_Bidiag_UT_form_U(), FLA_Bidiag_UT_form_V_ext(), and FLA_Svd_ext_u_unb_var1().