FLA_Scalr_l_blk_var2.c File Reference

(r12600)

Functions
FLA_Error	FLA_Scalr_l_blk_var2 (FLA_Obj alpha, FLA_Obj A, fla_scalr_t *cntl)

---

Function Documentation

FLA_Error FLA_Scalr_l_blk_var2	(	FLA_Obj	alpha,
		FLA_Obj	A,
		fla_scalr_t *	cntl
	)

References FLA_Cont_with_3x3_to_2x2(), FLA_Determine_blocksize(), FLA_Obj_min_dim(), FLA_Part_2x2(), FLA_Repart_2x2_to_3x3(), FLA_Scal_internal(), and FLA_Scalr_internal().

Referenced by FLA_Scalr_l().

{
  FLA_Obj ATL,   ATR,      A00, A01, A02, 
          ABL,   ABR,      A10, A11, A12,
                           A20, A21, A22;

  dim_t b;

  FLA_Part_2x2( A,    &ATL, &ATR,
                      &ABL, &ABR,     0, 0, FLA_BR );

  while ( FLA_Obj_min_dim( ATL ) > 0 ){

    b = FLA_Determine_blocksize( ATL, FLA_TL, FLA_Cntl_blocksize( cntl ) );

    FLA_Repart_2x2_to_3x3( ATL, /**/ ATR,       &A00, &A01, /**/ &A02,
                                                &A10, &A11, /**/ &A12,
                        /* ************* */   /* ******************** */
                           ABL, /**/ ABR,       &A20, &A21, /**/ &A22,
                           b, b, FLA_TL );

    /*------------------------------------------------------------*/

    // A11 = alpha * tril( A11 );
    FLA_Scalr_internal( FLA_LOWER_TRIANGULAR, alpha, A11,
                        FLA_Cntl_sub_scalr( cntl ) );

    // A10 = alpha * A10;
    FLA_Scal_internal( alpha, A10,
                       FLA_Cntl_sub_scal( cntl ) );

    /*------------------------------------------------------------*/

    FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR,       A00, /**/ A01, A02,
                            /* ************** */  /* ****************** */
                                                     A10, /**/ A11, A12,
                              &ABL, /**/ &ABR,       A20, /**/ A21, A22,
                              FLA_BR );
  }

  return FLA_SUCCESS;
}