/****************************************************************************/
/* (C) Copyright 1993 Universidade Estadual de Campinas (UNICAMP)           */
/*                    Campinas, SP, Brazil                                  */
/*                                                                          */
/* This file can be freely distributed, modified, and used for any          */
/*   non-commercial purpose, provided that this copyright and authorship    */
/*   notice be included in any copy or derived version of this file.        */
/*                                                                          */
/* DISCLAIMER: This software is offered ``as is'', without any guarantee    */
/*   as to fitness for any particular purpose.  Neither the copyright       */
/*   holder nor the authors or their employers can be held responsible for  */
/*   any damages that may result from its use.                              */
/****************************************************************************/

char *aat_ftag = "fmul2";
char *aat_fname = "f = (x - y) * (x + y) - 1";

Float aat_f_flt (Float x, Float y)
  {
    ROUND_NEAR;
    { Float u = (x - y);
      Float v = (x + y);
      return (u * v - One);
    }
  }

Interval aat_f_ia (Interval x, Interval y)
  {
    Interval u = ia_sub(x, y);
    Interval v = ia_add(x, y);
    Interval res = ia_shift(ia_mul(u, v), -One);
    return (res);
  }

AAP aat_f_aa (AAP x, AAP y)
  {
    MemP frame = aa_top();
    AAP u = aa_sub(x, y);
    AAP v = aa_add(x, y);
    AAP res = aa_shift(aa_mul(u, v), -One);
    return (aa_return(frame, res));
  }

Interval aat_fxd = {-Three, Three};
Interval aat_fyd = {-Three, Three};

int aat_fn = 16;