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_unb_var1(FLA_Diag diagA,FLA_Obj alpha,FLA_Obj A,FLA_Obj B)15 FLA_Error FLA_Trsm_luh_unb_var1( FLA_Diag diagA, FLA_Obj alpha, FLA_Obj A, FLA_Obj B )
16 {
17 FLA_Obj ATL, ATR, A00, a01, A02,
18 ABL, ABR, a10t, alpha11, a12t,
19 A20, a21, A22;
20
21 FLA_Obj BT, B0,
22 BB, b1t,
23 B2;
24
25 FLA_Scal_external( alpha, B );
26
27 FLA_Part_2x2( A, &ATL, &ATR,
28 &ABL, &ABR, 0, 0, FLA_TL );
29
30 FLA_Part_2x1( B, &BT,
31 &BB, 0, FLA_TOP );
32
33 while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) ){
34
35 FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &a01, &A02,
36 /* ************* */ /* ************************** */
37 &a10t, /**/ &alpha11, &a12t,
38 ABL, /**/ ABR, &A20, /**/ &a21, &A22,
39 1, 1, FLA_BR );
40
41 FLA_Repart_2x1_to_3x1( BT, &B0,
42 /* ** */ /* *** */
43 &b1t,
44 BB, &B2, 1, FLA_BOTTOM );
45
46 /*------------------------------------------------------------*/
47
48 /* b1t = b1t - a01' * B0; */
49 FLA_Gemvc_external( FLA_TRANSPOSE, FLA_CONJUGATE, FLA_MINUS_ONE, B0, a01, FLA_ONE, b1t );
50
51 /* b1t = b1t / alpha11'; */
52 if ( diagA != FLA_UNIT_DIAG )
53 FLA_Inv_scalc_external( FLA_CONJUGATE, alpha11, b1t );
54
55 /*------------------------------------------------------------*/
56
57 FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, a01, /**/ A02,
58 a10t, alpha11, /**/ a12t,
59 /* ************** */ /* ************************ */
60 &ABL, /**/ &ABR, A20, a21, /**/ A22,
61 FLA_TL );
62
63 FLA_Cont_with_3x1_to_2x1( &BT, B0,
64 b1t,
65 /* ** */ /* *** */
66 &BB, B2, FLA_TOP );
67
68 }
69
70 return FLA_SUCCESS;
71 }
72
73 #endif
74