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FLA_Bidiag_UT_u_unb_var2.c File Reference

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Functions

FLA_Error FLA_Bidiag_UT_u_unb_var2 (FLA_Obj A, FLA_Obj TU, FLA_Obj TV)
 
FLA_Error FLA_Bidiag_UT_u_step_unb_var2 (FLA_Obj A, FLA_Obj T, FLA_Obj S)
 

Function Documentation

◆ FLA_Bidiag_UT_u_step_unb_var2()

FLA_Error FLA_Bidiag_UT_u_step_unb_var2 ( FLA_Obj  A,
FLA_Obj  T,
FLA_Obj  S 
)
19{
20 FLA_Obj ATL, ATR, A00, a01, A02,
21 ABL, ABR, a10t, alpha11, a12t,
22 A20, a21, A22;
23 FLA_Obj TTL, TTR, T00, t01, T02,
24 TBL, TBR, t10t, tau11, t12t,
25 T20, t21, T22;
26 FLA_Obj STL, STR, S00, s01, S02,
27 SBL, SBR, s10t, sigma11, s12t,
28 S20, s21, S22;
29 FLA_Obj yT, y01,
30 yB, psi11,
31 y21;
32 FLA_Obj zT, z01,
33 zB, zeta11,
34 z21;
35 FLA_Obj vT, v01,
36 vB, nu11,
37 v21;
38 FLA_Obj v, y, z;
39
40 FLA_Obj beta;
41
42 FLA_Obj a12t_l, a12t_r;
43 FLA_Obj v21_t,
44 v21_b;
45
46 FLA_Datatype datatype_A;
47 dim_t m_A, n_A;
48 dim_t b_alg;
49
50
51 b_alg = FLA_Obj_length( T );
52
53 datatype_A = FLA_Obj_datatype( A );
54 m_A = FLA_Obj_length( A );
55 n_A = FLA_Obj_width( A );
56
57 FLA_Obj_create( datatype_A, 1, 1, 0, 0, &beta );
58 FLA_Obj_create( datatype_A, n_A, 1, 0, 0, &v );
59 FLA_Obj_create( datatype_A, n_A, 1, 0, 0, &y );
60 FLA_Obj_create( datatype_A, m_A, 1, 0, 0, &z );
61
62 FLA_Part_2x2( A, &ATL, &ATR,
63 &ABL, &ABR, 0, 0, FLA_TL );
64 FLA_Part_2x2( T, &TTL, &TTR,
65 &TBL, &TBR, 0, 0, FLA_TL );
66 FLA_Part_2x2( S, &STL, &STR,
67 &SBL, &SBR, 0, 0, FLA_TL );
68 FLA_Part_2x1( v, &vT,
69 &vB, 0, FLA_TOP );
70 FLA_Part_2x1( y, &yT,
71 &yB, 0, FLA_TOP );
72 FLA_Part_2x1( z, &zT,
73 &zB, 0, FLA_TOP );
74
75 while ( FLA_Obj_length( ATL ) < b_alg )
76 {
77 FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &a01, &A02,
78 /* ************* */ /* ************************** */
79 &a10t, /**/ &alpha11, &a12t,
80 ABL, /**/ ABR, &A20, /**/ &a21, &A22,
81 1, 1, FLA_BR );
82 FLA_Repart_2x2_to_3x3( TTL, /**/ TTR, &T00, /**/ &t01, &T02,
83 /* ************* */ /* ************************** */
84 &t10t, /**/ &tau11, &t12t,
85 TBL, /**/ TBR, &T20, /**/ &t21, &T22,
86 1, 1, FLA_BR );
87 FLA_Repart_2x2_to_3x3( STL, /**/ STR, &S00, /**/ &s01, &S02,
88 /* ************* */ /* ************************** */
89 &s10t, /**/ &sigma11, &s12t,
90 SBL, /**/ SBR, &S20, /**/ &s21, &S22,
91 1, 1, FLA_BR );
92 FLA_Repart_2x1_to_3x1( vT, &v01,
93 /* ** */ /* ***** */
94 &nu11,
95 vB, &v21, 1, FLA_BOTTOM );
96 FLA_Repart_2x1_to_3x1( yT, &y01,
97 /* ** */ /* ***** */
98 &psi11,
99 yB, &y21, 1, FLA_BOTTOM );
100 FLA_Repart_2x1_to_3x1( zT, &z01,
101 /* ** */ /* ***** */
102 &zeta11,
103 zB, &z21, 1, FLA_BOTTOM );
104
105 /*------------------------------------------------------------*/
106
107 // [ alpha11_new, u21, tau11 ] = House2( alpha11, a21 );
108 FLA_Househ2_UT( FLA_LEFT,
109 alpha11,
110 a21, tau11 );
111
112 if ( FLA_Obj_width( A22 ) > 0 )
113 {
114 // y21' = a12t + u21' * A22;
115 // y21 = conj(a12t) + A22' * u21;
116 FLA_Copyt( FLA_CONJ_TRANSPOSE, a12t, y21 );
117 FLA_Gemvc( FLA_CONJ_TRANSPOSE, FLA_NO_CONJUGATE, FLA_ONE, A22, a21, FLA_ONE, y21 );
118
119 // y21 = y21 / tau11;
120 FLA_Inv_scalc( FLA_NO_CONJUGATE, tau11, y21 );
121
122 // a12t = a12t - conj(y21)^T;
123 FLA_Axpyt( FLA_CONJ_TRANSPOSE, FLA_MINUS_ONE, y21, a12t );
124
125 FLA_Part_1x2( a12t, &a12t_l, &a12t_r, 1, FLA_LEFT );
126 FLA_Part_2x1( v21, &v21_t,
127 &v21_b, 1, FLA_TOP );
128
129 // [ a12t_l, v12t_b, sigma11 ] = House2( a12t_l, a12t_r );
130 FLA_Househ2_UT( FLA_RIGHT, a12t_l, a12t_r, sigma11 );
131
132 // v21_t = 1;
133 // v21_b = a12t_r^T;
134 FLA_Set( FLA_ONE, v21_t );
135 FLA_Copyt( FLA_TRANSPOSE, a12t_r, v21_b );
136
137 // beta = - y21' * v21;
138 FLA_Dotc( FLA_CONJUGATE, y21, v21, beta );
139 FLA_Scal( FLA_MINUS_ONE, beta );
140
141 // z21 = ( A22 - u21 * y21' ) * v21 / sigma11;
142 // = ( A22 * v21 - u21 * y21' * v21 ) / sigma11;
143 // = ( A22 * v21 + beta * u21 ) / sigma11;
144 FLA_Copy( a21, z21 );
145 FLA_Gemvc( FLA_NO_TRANSPOSE, FLA_NO_CONJUGATE, FLA_ONE, A22, v21, beta, z21 );
146 FLA_Inv_scalc( FLA_NO_CONJUGATE, sigma11, z21 );
147
148 // A22 = A22 - u21 * y21' - z21 * v21';
149 FLA_Gerc( FLA_NO_CONJUGATE, FLA_CONJUGATE, FLA_MINUS_ONE, a21, y21, A22 );
150 FLA_Gerc( FLA_NO_CONJUGATE, FLA_CONJUGATE, FLA_MINUS_ONE, z21, v21, A22 );
151
152 // s01 = conj(V02) * v21;
153 FLA_Gemv( FLA_CONJ_NO_TRANSPOSE, FLA_ONE, A02, v21, FLA_ZERO, s01 );
154 }
155
156 // t01 = a10t' + U20' * u21;
157 FLA_Copyt( FLA_CONJ_TRANSPOSE, a10t, t01 );
158 FLA_Gemv( FLA_CONJ_TRANSPOSE, FLA_ONE, A20, a21, FLA_ONE, t01 );
159
160 /*------------------------------------------------------------*/
161
162 FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, a01, /**/ A02,
163 a10t, alpha11, /**/ a12t,
164 /* ************** */ /* ************************ */
165 &ABL, /**/ &ABR, A20, a21, /**/ A22,
166 FLA_TL );
167 FLA_Cont_with_3x3_to_2x2( &TTL, /**/ &TTR, T00, t01, /**/ T02,
168 t10t, tau11, /**/ t12t,
169 /* ************** */ /* ************************ */
170 &TBL, /**/ &TBR, T20, t21, /**/ T22,
171 FLA_TL );
172 FLA_Cont_with_3x3_to_2x2( &STL, /**/ &STR, S00, s01, /**/ S02,
173 s10t, sigma11, /**/ s12t,
174 /* ************** */ /* ************************ */
175 &SBL, /**/ &SBR, S20, s21, /**/ S22,
176 FLA_TL );
177 FLA_Cont_with_3x1_to_2x1( &vT, v01,
178 nu11,
179 /* ** */ /* ***** */
180 &vB, v21, FLA_TOP );
181 FLA_Cont_with_3x1_to_2x1( &yT, y01,
182 psi11,
183 /* ** */ /* ***** */
184 &yB, y21, FLA_TOP );
185 FLA_Cont_with_3x1_to_2x1( &zT, z01,
186 zeta11,
187 /* ** */ /* ***** */
188 &zB, z21, FLA_TOP );
189 }
190
191 FLA_Obj_free( &beta );
192 FLA_Obj_free( &v );
193 FLA_Obj_free( &y );
194 FLA_Obj_free( &z );
195
196 return FLA_SUCCESS;
197}
FLA_Copy
FLA_Error FLA_Copy(FLA_Obj A, FLA_Obj B)
Definition FLA_Copy.c:15
FLA_Scal
FLA_Error FLA_Scal(FLA_Obj alpha, FLA_Obj A)
Definition FLA_Scal.c:15
FLA_Dotc
FLA_Error FLA_Dotc(FLA_Conj conj, FLA_Obj x, FLA_Obj y, FLA_Obj rho)
Definition FLA_Dotc.c:13
FLA_Axpyt
FLA_Error FLA_Axpyt(FLA_Trans trans, FLA_Obj alpha, FLA_Obj A, FLA_Obj B)
Definition FLA_Axpyt.c:15
FLA_Copyt
FLA_Error FLA_Copyt(FLA_Trans trans, FLA_Obj A, FLA_Obj B)
Definition FLA_Copyt.c:15
FLA_Inv_scalc
FLA_Error FLA_Inv_scalc(FLA_Conj conjalpha, FLA_Obj alpha, FLA_Obj A)
Definition FLA_Inv_scalc.c:13
FLA_Gerc
FLA_Error FLA_Gerc(FLA_Conj conjx, FLA_Conj conjy, FLA_Obj alpha, FLA_Obj x, FLA_Obj y, FLA_Obj A)
Definition FLA_Gerc.c:13
FLA_Gemvc
FLA_Error FLA_Gemvc(FLA_Trans transa, FLA_Conj conjx, FLA_Obj alpha, FLA_Obj A, FLA_Obj x, FLA_Obj beta, FLA_Obj y)
Definition FLA_Gemvc.c:13
FLA_Gemv
FLA_Error FLA_Gemv(FLA_Trans transa, FLA_Obj alpha, FLA_Obj A, FLA_Obj x, FLA_Obj beta, FLA_Obj y)
Definition FLA_Gemv.c:15
FLA_MINUS_ONE
FLA_Obj FLA_MINUS_ONE
Definition FLA_Init.c:22
FLA_ZERO
FLA_Obj FLA_ZERO
Definition FLA_Init.c:20
FLA_ONE
FLA_Obj FLA_ONE
Definition FLA_Init.c:18
FLA_Cont_with_3x3_to_2x2
FLA_Error FLA_Cont_with_3x3_to_2x2(FLA_Obj *ATL, FLA_Obj *ATR, FLA_Obj A00, FLA_Obj A01, FLA_Obj A02, FLA_Obj A10, FLA_Obj A11, FLA_Obj A12, FLA_Obj *ABL, FLA_Obj *ABR, FLA_Obj A20, FLA_Obj A21, FLA_Obj A22, FLA_Quadrant quadrant)
Definition FLA_View.c:304
FLA_Part_2x2
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_Cont_with_3x1_to_2x1
FLA_Error FLA_Cont_with_3x1_to_2x1(FLA_Obj *AT, FLA_Obj A0, FLA_Obj A1, FLA_Obj *AB, FLA_Obj A2, FLA_Side side)
Definition FLA_View.c:428
FLA_Repart_2x1_to_3x1
FLA_Error FLA_Repart_2x1_to_3x1(FLA_Obj AT, FLA_Obj *A0, FLA_Obj *A1, FLA_Obj AB, FLA_Obj *A2, dim_t mb, FLA_Side side)
Definition FLA_View.c:226
FLA_Obj_width
dim_t FLA_Obj_width(FLA_Obj obj)
Definition FLA_Query.c:123
FLA_Obj_create
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_Part_1x2
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_Part_2x1
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
FLA_Obj_length
dim_t FLA_Obj_length(FLA_Obj obj)
Definition FLA_Query.c:116
FLA_Repart_2x2_to_3x3
FLA_Error FLA_Repart_2x2_to_3x3(FLA_Obj ATL, FLA_Obj ATR, FLA_Obj *A00, FLA_Obj *A01, FLA_Obj *A02, FLA_Obj *A10, FLA_Obj *A11, FLA_Obj *A12, FLA_Obj ABL, FLA_Obj ABR, FLA_Obj *A20, FLA_Obj *A21, FLA_Obj *A22, dim_t mb, dim_t nb, FLA_Quadrant quadrant)
Definition FLA_View.c:142
FLA_Obj_free
FLA_Error FLA_Obj_free(FLA_Obj *obj)
Definition FLA_Obj.c:588
FLA_Obj_datatype
FLA_Datatype FLA_Obj_datatype(FLA_Obj obj)
Definition FLA_Query.c:13
FLA_Datatype
int FLA_Datatype
Definition FLA_type_defs.h:49
dim_t
unsigned long dim_t
Definition FLA_type_defs.h:71
FLA_Set
FLA_Error FLA_Set(FLA_Obj alpha, FLA_Obj A)
Definition FLA_Set.c:13
FLA_Househ2_UT
FLA_Error FLA_Househ2_UT(FLA_Side side, FLA_Obj chi_1, FLA_Obj x2, FLA_Obj tau)
Definition FLA_Househ2_UT.c:16
i
int i
Definition bl1_axmyv2.c:145
FLA_Obj_view
Definition FLA_type_defs.h:159

References FLA_Axpyt(), FLA_Cont_with_3x1_to_2x1(), FLA_Cont_with_3x3_to_2x2(), FLA_Copy(), FLA_Copyt(), FLA_Dotc(), FLA_Gemv(), FLA_Gemvc(), FLA_Gerc(), FLA_Househ2_UT(), FLA_Inv_scalc(), FLA_MINUS_ONE, FLA_Obj_create(), FLA_Obj_datatype(), FLA_Obj_free(), FLA_Obj_length(), FLA_Obj_width(), FLA_ONE, FLA_Part_1x2(), FLA_Part_2x1(), FLA_Part_2x2(), FLA_Repart_2x1_to_3x1(), FLA_Repart_2x2_to_3x3(), FLA_Scal(), FLA_Set(), FLA_ZERO, and i.

Referenced by FLA_Bidiag_UT_u_unb_var2().

◆ FLA_Bidiag_UT_u_unb_var2()

FLA_Error FLA_Bidiag_UT_u_unb_var2 ( FLA_Obj  A,
FLA_Obj  TU,
FLA_Obj  TV 
)
14{
15 return FLA_Bidiag_UT_u_step_unb_var2( A, TU, TV );
16}
FLA_Bidiag_UT_u_step_unb_var2
FLA_Error FLA_Bidiag_UT_u_step_unb_var2(FLA_Obj A, FLA_Obj T, FLA_Obj S)
Definition FLA_Bidiag_UT_u_unb_var2.c:18

References FLA_Bidiag_UT_u_step_unb_var2(), and i.

Referenced by FLA_Bidiag_UT_u().

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