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FLA_Trinv_lu_unb_var4.c File Reference

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Functions

FLA_Error FLA_Trinv_lu_unb_var4 (FLA_Obj A)
 

Function Documentation

◆ FLA_Trinv_lu_unb_var4()

FLA_Error FLA_Trinv_lu_unb_var4 ( FLA_Obj  A)
16 {
17  FLA_Obj ATL, ATR, A00, a01, A02,
18  ABL, ABR, a10t, alpha11, a12t,
19  A20, a21, A22;
20 
21  FLA_Part_2x2( A, &ATL, &ATR,
22  &ABL, &ABR, 0, 0, FLA_TL );
23 
24  while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) ){
25 
26  FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &a01, &A02,
27  /* ************* */ /* ************************** */
28  &a10t, /**/ &alpha11, &a12t,
29  ABL, /**/ ABR, &A20, /**/ &a21, &A22,
30  1, 1, FLA_BR );
31 
32  /*------------------------------------------------------------*/
33 
34  // a21 = -trilu( A22 ) \ a21;
36  FLA_Trsv_external( FLA_LOWER_TRIANGULAR, FLA_NO_TRANSPOSE, FLA_UNIT_DIAG, A22, a21 );
37 
38  // A20 = -a21 * a10t + A20;
39  FLA_Ger_external( FLA_MINUS_ONE, a21, a10t, A20 );
40 
41  // a10t' = trilu( A00' ) * a10t';
42  FLA_Trmv_external( FLA_LOWER_TRIANGULAR, FLA_TRANSPOSE, FLA_UNIT_DIAG, A00, a10t );
43 
44  /*------------------------------------------------------------*/
45 
46  FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, a01, /**/ A02,
47  a10t, alpha11, /**/ a12t,
48  /* ************** */ /* ************************ */
49  &ABL, /**/ &ABR, A20, a21, /**/ A22,
50  FLA_TL );
51 
52  }
53 
54  return FLA_SUCCESS;
55 }
FLA_Error FLA_Scal_external(FLA_Obj alpha, FLA_Obj A)
Definition: FLA_Scal_external.c:13
FLA_Error FLA_Ger_external(FLA_Obj alpha, FLA_Obj x, FLA_Obj y, FLA_Obj A)
Definition: FLA_Ger_external.c:13
FLA_Error FLA_Trsv_external(FLA_Uplo uplo, FLA_Trans transa, FLA_Diag diag, FLA_Obj A, FLA_Obj x)
Definition: FLA_Trsv_external.c:13
FLA_Error FLA_Trmv_external(FLA_Uplo uplo, FLA_Trans transa, FLA_Diag diag, FLA_Obj A, FLA_Obj x)
Definition: FLA_Trmv_external.c:13
FLA_Obj FLA_MINUS_ONE
Definition: FLA_Init.c:22
FLA_Error FLA_Cont_with_3x3_to_2x2(FLA_Obj *ATL, FLA_Obj *ATR, FLA_Obj A00, FLA_Obj A01, FLA_Obj A02, FLA_Obj A10, FLA_Obj A11, FLA_Obj A12, FLA_Obj *ABL, FLA_Obj *ABR, FLA_Obj A20, FLA_Obj A21, FLA_Obj A22, FLA_Quadrant quadrant)
Definition: FLA_View.c:304
FLA_Error FLA_Part_2x2(FLA_Obj A, FLA_Obj *A11, FLA_Obj *A12, FLA_Obj *A21, FLA_Obj *A22, dim_t mb, dim_t nb, FLA_Quadrant quadrant)
Definition: FLA_View.c:17
dim_t FLA_Obj_length(FLA_Obj obj)
Definition: FLA_Query.c:116
FLA_Error FLA_Repart_2x2_to_3x3(FLA_Obj ATL, FLA_Obj ATR, FLA_Obj *A00, FLA_Obj *A01, FLA_Obj *A02, FLA_Obj *A10, FLA_Obj *A11, FLA_Obj *A12, FLA_Obj ABL, FLA_Obj ABR, FLA_Obj *A20, FLA_Obj *A21, FLA_Obj *A22, dim_t mb, dim_t nb, FLA_Quadrant quadrant)
Definition: FLA_View.c:142
Definition: FLA_type_defs.h:159

References FLA_Cont_with_3x3_to_2x2(), FLA_Ger_external(), FLA_MINUS_ONE, FLA_Obj_length(), FLA_Part_2x2(), FLA_Repart_2x2_to_3x3(), FLA_Scal_external(), FLA_Trmv_external(), and FLA_Trsv_external().

Referenced by FLA_Trinv_lu().