(* *************************************************************)
(*                                                             *)
(*             The Compcert verified compiler                  *)
(*                                                             *)
(*           Sylvain Boulmé     Grenoble-INP, VERIMAG          *)
(*           Xavier Leroy       INRIA Paris-Rocquencourt       *)
(*           David Monniaux     CNRS, VERIMAG                  *)
(*           Cyril Six          Kalray                         *)
(*                                                             *)
(*  Copyright Kalray. Copyright VERIMAG. All rights reserved.  *)
(*  This file is distributed under the terms of the INRIA      *)
(*  Non-Commercial License Agreement.                          *)
(*                                                             *)
(* *************************************************************)

(** Architecture-dependent parameters for MPPA KVX. Mostly copied from the Risc-V backend *)

Require Import ZArith List.
From Flocq Require Import Binary Bits.

Definition ptr64 := true.

Definition big_endian := false.

Definition align_int64 := 8%Z.
Definition align_float64 := 8%Z.

Definition splitlong := false.

Lemma splitlong_ptr32: splitlong = true -> ptr64 = false.
Proof.
  unfold splitlong. congruence. 
Qed.

(** FIXME - Check the properties below *)

(** Section 7.3: "Except when otherwise stated, if the result of a
   floating-point operation is NaN, it is the canonical NaN. The
   canonical NaN has a positive sign and all significand bits clear
   except the MSB, a.k.a. the quiet bit."
   We need to extend the [choose_binop_pl] functions to account for
   this case. *)

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.

Definition fpu_returns_default_qNaN := false.

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

Lemma choose_nan_32_idem: forall n,
  choose_nan_32 (n :: n :: nil) = choose_nan_32 (n :: nil).
Proof. auto. Qed.

Definition fma_order {A: Type} (x y z: A) := (x, z, y).

Definition fma_invalid_mul_is_nan := false.
Definition float_of_single_preserves_sNaN := false.

Global Opaque ptr64 big_endian splitlong
              default_nan_64 choose_nan_64
              default_nan_32 choose_nan_32
              fma_order fma_invalid_mul_is_nan
              float_of_single_preserves_sNaN.

(** Whether to generate position-independent code or not *)

Parameter pic_code: unit -> bool.

Definition has_notrap_loads := true.