FLA_Norm_inf.c File Reference

(r)

Functions
FLA_Error	FLA_Norm_inf (FLA_Obj A, FLA_Obj norm)

Function Documentation

FLA_Norm_inf()

FLA_Error FLA_Norm_inf	(	FLA_Obj	A,
		FLA_Obj	norm )

{
  FLA_Obj AT,              A0,
          AB,              a1t,
                           A2;
 
  FLA_Obj bT,              b0,
          bB,              beta1,
                           b2;
  FLA_Obj b;
 
  if ( FLA_Check_error_level() >= FLA_MIN_ERROR_CHECKING )
    FLA_Norm_inf_check( A, norm );
 
  FLA_Obj_create( FLA_Obj_datatype( A ), FLA_Obj_length( A ), 1, 0, 0, &b );
 
  FLA_Part_2x1( A,    &AT, 
                      &AB,            0, FLA_TOP );
 
  FLA_Part_2x1( b,    &bT, 
                      &bB,            0, FLA_TOP );
 
  while ( FLA_Obj_length( AT ) < FLA_Obj_length( A ) ){
 
    FLA_Repart_2x1_to_3x1( AT,                &A0, 
                        /* ** */            /* *** */
                                              &a1t, 
                           AB,                &A2,        1, FLA_BOTTOM );
 
    FLA_Repart_2x1_to_3x1( bT,                &b0, 
                        /* ** */            /* ***** */
                                              &beta1, 
                           bB,                &b2,        1, FLA_BOTTOM );
 
    /*------------------------------------------------------------*/
 
    FLA_Asum( a1t, beta1 );
 
    /*------------------------------------------------------------*/
 
    FLA_Cont_with_3x1_to_2x1( &AT,                A0, 
                                                  a1t, 
                            /* ** */           /* *** */
                              &AB,                A2,     FLA_TOP );
 
    FLA_Cont_with_3x1_to_2x1( &bT,                b0, 
                                                  beta1, 
                            /* ** */           /* ***** */
                              &bB,                b2,     FLA_TOP );
 
  }
 
  FLA_Max_abs_value( b, norm );
 
  FLA_Obj_free( &b );
 
  return FLA_SUCCESS;
}

References FLA_Asum(), FLA_Check_error_level(), FLA_Cont_with_3x1_to_2x1(), FLA_Max_abs_value(), FLA_Norm_inf_check(), FLA_Obj_create(), FLA_Obj_datatype(), FLA_Obj_free(), FLA_Obj_length(), FLA_Part_2x1(), and FLA_Repart_2x1_to_3x1().