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(* *********************************************************************)
(* *)
(* 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 ARM *)
Require Import ZArith.
(*From Flocq*)
Require Import Binary Bits.
Definition ptr64 := false.
Parameter big_endian: bool.
Definition align_int64 := 8%Z.
Definition align_float64 := 8%Z.
Definition splitlong := true.
Lemma splitlong_ptr32: splitlong = true -> ptr64 = false.
Proof.
unfold splitlong, ptr64; congruence.
Qed.
Definition default_nan_64 : { x : binary64 | is_nan _ _ x = true } :=
exist _ (B754_nan 53 1024 false (iter_nat 51 _ xO xH) (eq_refl true)) (eq_refl true).
Definition choose_binop_pl_64 (pl1 pl2 : positive) :=
(** Choose second NaN if pl2 is sNaN but pl1 is qNan.
In all other cases, choose first NaN *)
(Pos.testbit pl1 51 && negb (Pos.testbit pl2 51))%bool.
Definition default_nan_32 : { x : binary32 | is_nan _ _ x = true } :=
exist _ (B754_nan 24 128 false (iter_nat 22 _ xO xH) (eq_refl true)) (eq_refl true).
Definition choose_binop_pl_32 (pl1 pl2 : positive) :=
(** Choose second NaN if pl2 is sNaN but pl1 is qNan.
In all other cases, choose first NaN *)
(Pos.testbit pl1 22 && negb (Pos.testbit pl2 22))%bool.
Definition fpu_returns_default_qNaN := false.
Definition float_of_single_preserves_sNaN := false.
Global Opaque ptr64 big_endian splitlong
default_nan_64 choose_binop_pl_64
default_nan_32 choose_binop_pl_32
fpu_returns_default_qNaN
float_of_single_preserves_sNaN.
(** Which ABI to use: either the standard ARM EABI with floats passed
in integer registers, or the "hardfloat" variant of the EABI
that uses FP registers instead. *)
Inductive abi_kind := Softfloat | Hardfloat.
Parameter abi: abi_kind.
(** Whether instructions added with Thumb2 are supported. True for ARMv6T2
and above. *)
Parameter thumb2_support: bool.
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