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
FLA_Trsm_luh_blk_var2(FLA_Diag diagA,FLA_Obj alpha,FLA_Obj A,FLA_Obj B,fla_trsm_t * cntl)13 FLA_Error FLA_Trsm_luh_blk_var2( FLA_Diag diagA, FLA_Obj alpha, FLA_Obj A, FLA_Obj B, fla_trsm_t* cntl )
14 {
15 FLA_Obj ATL, ATR, A00, A01, A02,
16 ABL, ABR, A10, A11, A12,
17 A20, A21, A22;
18
19 FLA_Obj BT, B0,
20 BB, B1,
21 B2;
22
23 dim_t b;
24
25 FLA_Scal_internal( alpha, B,
26 FLA_Cntl_sub_scal( cntl ) );
27
28 FLA_Part_2x2( A, &ATL, &ATR,
29 &ABL, &ABR, 0, 0, FLA_TL );
30
31 FLA_Part_2x1( B, &BT,
32 &BB, 0, FLA_TOP );
33
34 while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) ){
35
36 b = FLA_Determine_blocksize( ABR, FLA_BR, FLA_Cntl_blocksize( cntl ) );
37
38 FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &A01, &A02,
39 /* ************* */ /* ******************** */
40 &A10, /**/ &A11, &A12,
41 ABL, /**/ ABR, &A20, /**/ &A21, &A22,
42 b, b, FLA_BR );
43
44 FLA_Repart_2x1_to_3x1( BT, &B0,
45 /* ** */ /* ** */
46 &B1,
47 BB, &B2, b, FLA_BOTTOM );
48
49 /*------------------------------------------------------------*/
50
51 /* B1 = triu( A11' ) \ B1 */
52 FLA_Trsm_internal( FLA_LEFT, FLA_UPPER_TRIANGULAR, FLA_CONJ_TRANSPOSE, diagA,
53 FLA_ONE, A11, B1,
54 FLA_Cntl_sub_trsm( cntl ) );
55
56 /* B2 = B2 - A12' * B1 */
57 FLA_Gemm_internal( FLA_CONJ_TRANSPOSE, FLA_NO_TRANSPOSE,
58 FLA_MINUS_ONE, A12, B1, FLA_ONE, B2,
59 FLA_Cntl_sub_gemm( cntl ) );
60
61 /*------------------------------------------------------------*/
62
63 FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, A01, /**/ A02,
64 A10, A11, /**/ A12,
65 /* ************** */ /* ****************** */
66 &ABL, /**/ &ABR, A20, A21, /**/ A22,
67 FLA_TL );
68
69 FLA_Cont_with_3x1_to_2x1( &BT, B0,
70 B1,
71 /* ** */ /* ** */
72 &BB, B2, FLA_TOP );
73
74 }
75
76 return FLA_SUCCESS;
77 }
78
79