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_Trsm_luh_blk_var1(FLA_Diag diagA,FLA_Obj alpha,FLA_Obj A,FLA_Obj B,fla_trsm_t * cntl)15 FLA_Error FLA_Trsm_luh_blk_var1( FLA_Diag diagA, FLA_Obj alpha, FLA_Obj A, FLA_Obj B, fla_trsm_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 BT, B0,
22 BB, B1,
23 B2;
24
25 dim_t b;
26
27 FLA_Scal_internal( alpha, B,
28 FLA_Cntl_sub_scal( cntl ) );
29
30 FLA_Part_2x2( A, &ATL, &ATR,
31 &ABL, &ABR, 0, 0, FLA_TL );
32
33 FLA_Part_2x1( B, &BT,
34 &BB, 0, FLA_TOP );
35
36 while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) ){
37
38 b = FLA_Determine_blocksize( ABR, FLA_BR, FLA_Cntl_blocksize( cntl ) );
39
40 FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &A01, &A02,
41 /* ************* */ /* ******************** */
42 &A10, /**/ &A11, &A12,
43 ABL, /**/ ABR, &A20, /**/ &A21, &A22,
44 b, b, FLA_BR );
45
46 FLA_Repart_2x1_to_3x1( BT, &B0,
47 /* ** */ /* ** */
48 &B1,
49 BB, &B2, b, FLA_BOTTOM );
50
51 /*------------------------------------------------------------*/
52
53 /* B1 = B1 - A01' * B0 */
54 FLA_Gemm_internal( FLA_CONJ_TRANSPOSE, FLA_NO_TRANSPOSE,
55 FLA_MINUS_ONE, A01, B0, FLA_ONE, B1,
56 FLA_Cntl_sub_gemm( cntl ) );
57
58 /* B1 = triu( A11' ) \ B1 */
59 FLA_Trsm_internal( FLA_LEFT, FLA_UPPER_TRIANGULAR, FLA_CONJ_TRANSPOSE, diagA,
60 FLA_ONE, A11, B1,
61 FLA_Cntl_sub_trsm( cntl ) );
62
63 /*------------------------------------------------------------*/
64
65 FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, A01, /**/ A02,
66 A10, A11, /**/ A12,
67 /* ************** */ /* ****************** */
68 &ABL, /**/ &ABR, A20, A21, /**/ A22,
69 FLA_TL );
70
71 FLA_Cont_with_3x1_to_2x1( &BT, B0,
72 B1,
73 /* ** */ /* ** */
74 &BB, B2, FLA_TOP );
75
76 }
77
78 return FLA_SUCCESS;
79 }
80
81 #endif
82