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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.
Require Import Fappli_IEEE.
Require Import Fappli_IEEE_bits.
Definition big_endian := false.
Notation align_int64 := 8%Z (only parsing).
Notation align_float64 := 8%Z (only parsing).
Program Definition default_pl_64 : bool * nan_pl 53 :=
(false, nat_iter 51 xO xH).
Definition choose_binop_pl_64 (s1: bool) (pl1: nan_pl 53) (s2: bool) (pl2: nan_pl 53) :=
(** Choose second NaN if pl2 is sNaN but pl1 is qNan.
In all other cases, choose first NaN *)
(Pos.testbit (proj1_sig pl1) 51 &&
negb (Pos.testbit (proj1_sig pl2) 51))%bool.
Program Definition default_pl_32 : bool * nan_pl 24 :=
(false, nat_iter 22 xO xH).
Definition choose_binop_pl_32 (s1: bool) (pl1: nan_pl 24) (s2: bool) (pl2: nan_pl 24) :=
(** Choose second NaN if pl2 is sNaN but pl1 is qNan.
In all other cases, choose first NaN *)
(Pos.testbit (proj1_sig pl1) 22 &&
negb (Pos.testbit (proj1_sig pl2) 22))%bool.
Definition float_of_single_preserves_sNaN := false.
Global Opaque big_endian
default_pl_64 choose_binop_pl_64
default_pl_32 choose_binop_pl_32
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.
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