(* *********************************************************************)
(*                                                                     *)
(*              The Compcert verified compiler                         *)
(*                                                                     *)
(*          Xavier Leroy, INRIA Paris-Rocquencourt                     *)
(*          Jacques-Henri Jourdan, INRIA Paris-Rocquencourt            *)
(*                                                                     *)
(*  Copyright Institut National de Recherche en Informatique et en     *)
(*  Automatique.  All rights reserved.  This file is distributed       *)
(*  under the terms of the GNU General Public License as published by  *)
(*  the Free Software Foundation, either version 2 of the License, or  *)
(*  (at your option) any later version.  This file is also distributed *)
(*  under the terms of the INRIA Non-Commercial License Agreement.     *)
(*                                                                     *)
(* *********************************************************************)
(** Architecture-dependent parameters for PowerPC *)
(*From Flocq*)
Definition ptr64 := false.
Definition big_endian := true.
Definition align_int64 := 8%Z.
Definition align_float64 := 8%Z.
(** Can we use the 64-bit extensions to the PowerPC architecture? *)
Parameter ppc64 : bool.
(** Should single-precision FP arguments passed on stack be passed as singles or use double FP format. *)
Parameter single_passed_as_single : bool.
Definition splitlong := negb ppc64.
Definition default_nan_64 := (false, iter_nat 51 _ xO xH).
Definition default_nan_32 := (false, iter_nat 22 _ xO xH).
(* Always choose the first NaN argument, if any *)
Definition choose_nan_64 (l: list (bool * positive)) : bool * positive :=
match l with nil => default_nan_64 | n :: _ => n end.
Definition choose_nan_32 (l: list (bool * positive)) : bool * positive :=
match l with nil => default_nan_32 | n :: _ => n end.

Lemma choose_nan_64_idem: forall n,
choose_nan_64 (n :: n :: nil) = choose_nan_64 (n :: nil).