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(***********************************************************************)
(*                                                                     *)
(*                                OCaml                                *)
(*                                                                     *)
(*            Xavier Leroy, projet Cristal, INRIA Rocquencourt         *)
(*                                                                     *)
(*  Copyright 1996 Institut National de Recherche en Informatique et   *)
(*  en Automatique.  All rights reserved.  This file is distributed    *)
(*  under the terms of the GNU Library General Public License, with    *)
(*  the special exception on linking described in file ../LICENSE.     *)
(*                                                                     *)
(***********************************************************************)

(* Module [Nativeint]: processor-native integers *)

external neg: nativeint -> nativeint = "%nativeint_neg"
external add: nativeint -> nativeint -> nativeint = "%nativeint_add"
external sub: nativeint -> nativeint -> nativeint = "%nativeint_sub"
external mul: nativeint -> nativeint -> nativeint = "%nativeint_mul"
external div: nativeint -> nativeint -> nativeint = "%nativeint_div"
external rem: nativeint -> nativeint -> nativeint = "%nativeint_mod"
external logand: nativeint -> nativeint -> nativeint = "%nativeint_and"
external logor: nativeint -> nativeint -> nativeint = "%nativeint_or"
external logxor: nativeint -> nativeint -> nativeint = "%nativeint_xor"
external shift_left: nativeint -> int -> nativeint = "%nativeint_lsl"
external shift_right: nativeint -> int -> nativeint = "%nativeint_asr"
external shift_right_logical: nativeint -> int -> nativeint = "%nativeint_lsr"
external of_int: int -> nativeint = "%nativeint_of_int"
external to_int: nativeint -> int = "%nativeint_to_int"
external of_float : float -> nativeint = "caml_nativeint_of_float"
external to_float : nativeint -> float = "caml_nativeint_to_float"
external of_int32: int32 -> nativeint = "%nativeint_of_int32"
external to_int32: nativeint -> int32 = "%nativeint_to_int32"

let zero = 0n
let one = 1n
let minus_one = -1n
let succ n = add n 1n
let pred n = sub n 1n
let abs n = if n >= 0n then n else neg n
let size = Sys.word_size
let min_int = shift_left 1n (size - 1)
let max_int = sub min_int 1n
let lognot n = logxor n (-1n)

external format : string -> nativeint -> string = "caml_nativeint_format"
let to_string n = format "%d" n

external of_string: string -> nativeint = "caml_nativeint_of_string"

type t = nativeint

let compare (x: t) (y: t) = Pervasives.compare x y