1 /*
2
3 Copyright (C) 2014, The University of Texas at Austin
4
5 This file is part of libflame and is available under the 3-Clause
6 BSD license, which can be found in the LICENSE file at the top-level
7 directory, or at http://opensource.org/licenses/BSD-3-Clause
8
9 */
10
11 #include "FLAME.h"
12
13 #ifdef FLA_ENABLE_NON_CRITICAL_CODE
14
FLA_Trsv_uc_blk_var1(FLA_Diag diagA,FLA_Obj A,FLA_Obj x,fla_trsv_t * cntl)15 FLA_Error FLA_Trsv_uc_blk_var1( FLA_Diag diagA, FLA_Obj A, FLA_Obj x, fla_trsv_t* cntl )
16 {
17 FLA_Obj ATL, ATR, A00, A01, A02,
18 ABL, ABR, A10, A11, A12,
19 A20, A21, A22;
20
21 FLA_Obj xT, x0,
22 xB, x1,
23 x2;
24
25 dim_t b;
26
27 FLA_Part_2x2( A, &ATL, &ATR,
28 &ABL, &ABR, 0, 0, FLA_TL );
29
30 FLA_Part_2x1( x, &xT,
31 &xB, 0, FLA_TOP );
32
33 while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) ){
34
35 b = FLA_Determine_blocksize( ABR, FLA_BR, FLA_Cntl_blocksize( cntl ) );
36
37 FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &A01, &A02,
38 /* ************* */ /* ******************** */
39 &A10, /**/ &A11, &A12,
40 ABL, /**/ ABR, &A20, /**/ &A21, &A22,
41 b, b, FLA_BR );
42
43 FLA_Repart_2x1_to_3x1( xT, &x0,
44 /* ** */ /* ** */
45 &x1,
46 xB, &x2, b, FLA_BOTTOM );
47
48 /*------------------------------------------------------------*/
49
50 /* x1 = x1 - A01' * x0 */
51 FLA_Gemv_internal( FLA_CONJ_TRANSPOSE,
52 FLA_MINUS_ONE, A01, x0, FLA_ONE, x1,
53 FLA_Cntl_sub_gemv( cntl ) );
54
55 /* x1 = triu( A11' ) \ x1 */
56 FLA_Trsv_internal( FLA_UPPER_TRIANGULAR, FLA_CONJ_TRANSPOSE, diagA,
57 A11, x1,
58 FLA_Cntl_sub_trsv( cntl ) );
59
60 /*------------------------------------------------------------*/
61
62 FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, A01, /**/ A02,
63 A10, A11, /**/ A12,
64 /* ************** */ /* ****************** */
65 &ABL, /**/ &ABR, A20, A21, /**/ A22,
66 FLA_TL );
67
68 FLA_Cont_with_3x1_to_2x1( &xT, x0,
69 x1,
70 /* ** */ /* ** */
71 &xB, x2, FLA_TOP );
72
73 }
74
75 return FLA_SUCCESS;
76 }
77
78 #endif
79