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FLA_LU_find_zero_on_diagonal.c File Reference

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Functions

FLA_Error FLA_LU_find_zero_on_diagonal (FLA_Obj A)
 

Function Documentation

◆ FLA_LU_find_zero_on_diagonal()

FLA_Error FLA_LU_find_zero_on_diagonal ( FLA_Obj  A)

References FLA_Check_error_level(), FLA_Cont_with_3x3_to_2x2(), FLA_LU_find_zero_on_diagonal_check(), FLA_Obj_equals(), FLA_Obj_length(), FLA_Obj_min_dim(), FLA_Part_2x2(), FLA_Repart_2x2_to_3x3(), and FLA_ZERO.

Referenced by FLA_LU_nopiv(), and FLASH_LU_find_zero_on_diagonal().

14 {
15  FLA_Obj ATL, ATR, A00, a01, A02,
16  ABL, ABR, a10t, alpha11, a12t,
17  A20, a21, A22;
18 
19  if ( FLA_Check_error_level() >= FLA_MIN_ERROR_CHECKING )
21 
22  FLA_Part_2x2( A, &ATL, &ATR,
23  &ABL, &ABR, 0, 0, FLA_TL );
24 
25  while ( FLA_Obj_length( ATL ) < FLA_Obj_min_dim( A ) ){
26 
27  FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &a01, &A02,
28  /* ************* */ /* ************************** */
29  &a10t, /**/ &alpha11, &a12t,
30  ABL, /**/ ABR, &A20, /**/ &a21, &A22,
31  1, 1, FLA_BR );
32 
33  /*------------------------------------------------------------*/
34 
35  if ( FLA_Obj_equals( alpha11, FLA_ZERO ) ) return FLA_Obj_length( A00 );
36 
37  /*------------------------------------------------------------*/
38 
39  FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, a01, /**/ A02,
40  a10t, alpha11, /**/ a12t,
41  /* ************** */ /* ************************ */
42  &ABL, /**/ &ABR, A20, a21, /**/ A22,
43  FLA_TL );
44  }
45 
46  return FLA_SUCCESS;
47 }
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
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
Definition: FLA_type_defs.h:158
FLA_Bool FLA_Obj_equals(FLA_Obj A, FLA_Obj B)
Definition: FLA_Query.c:507
FLA_Error FLA_LU_find_zero_on_diagonal_check(FLA_Obj A)
Definition: FLA_LU_find_zero_on_diagonal_check.c:13
unsigned int FLA_Check_error_level(void)
Definition: FLA_Check.c:18
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
dim_t FLA_Obj_length(FLA_Obj obj)
Definition: FLA_Query.c:116
FLA_Obj FLA_ZERO
Definition: FLA_Init.c:20
dim_t FLA_Obj_min_dim(FLA_Obj obj)
Definition: FLA_Query.c:153