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_rut_unb_var2(FLA_Diag diagA,FLA_Obj alpha,FLA_Obj A,FLA_Obj B)15 FLA_Error FLA_Trsm_rut_unb_var2( 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 BL, BR, B0, b1, B2;
22
23 FLA_Scal_external( alpha, B );
24
25 FLA_Part_2x2( A, &ATL, &ATR,
26 &ABL, &ABR, 0, 0, FLA_BR );
27
28 FLA_Part_1x2( B, &BL, &BR, 0, FLA_RIGHT );
29
30 while ( FLA_Obj_length( ABR ) < FLA_Obj_length( A ) ){
31
32 FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, &a01, /**/ &A02,
33 &a10t, &alpha11, /**/ &a12t,
34 /* ************* */ /* ************************** */
35 ABL, /**/ ABR, &A20, &a21, /**/ &A22,
36 1, 1, FLA_TL );
37
38 FLA_Repart_1x2_to_1x3( BL, /**/ BR, &B0, &b1, /**/ &B2,
39 1, FLA_LEFT );
40
41 /*------------------------------------------------------------*/
42
43 /* b1 = b1 / alpha11; */
44 if ( diagA != FLA_UNIT_DIAG )
45 FLA_Inv_scal_external( alpha11, b1 );
46
47 /* B0 = B0 - b1 * a01'; */
48 FLA_Ger_external( FLA_MINUS_ONE, b1, a01, B0 );
49
50 /*------------------------------------------------------------*/
51
52 FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, /**/ a01, A02,
53 /* ************** */ /* ************************ */
54 a10t, /**/ alpha11, a12t,
55 &ABL, /**/ &ABR, A20, /**/ a21, A22,
56 FLA_BR );
57
58 FLA_Cont_with_1x3_to_1x2( &BL, /**/ &BR, B0, /**/ b1, B2,
59 FLA_RIGHT );
60
61 }
62
63 return FLA_SUCCESS;
64 }
65
66 #endif
67