66 lines
3.1 KiB
OCaml
66 lines
3.1 KiB
OCaml
(**************************************************************************)
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(* *)
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(* OCaml *)
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(* *)
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(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* en Automatique. *)
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(* *)
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(* All rights reserved. This file is distributed under the terms of *)
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(* the GNU Lesser General Public License version 2.1, with the *)
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(* special exception on linking described in the file LICENSE. *)
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(* *)
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(**************************************************************************)
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(* Module [Nativeint]: processor-native integers *)
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external neg: nativeint -> nativeint = "%nativeint_neg"
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external add: nativeint -> nativeint -> nativeint = "%nativeint_add"
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external sub: nativeint -> nativeint -> nativeint = "%nativeint_sub"
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external mul: nativeint -> nativeint -> nativeint = "%nativeint_mul"
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external div: nativeint -> nativeint -> nativeint = "%nativeint_div"
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external rem: nativeint -> nativeint -> nativeint = "%nativeint_mod"
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external logand: nativeint -> nativeint -> nativeint = "%nativeint_and"
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external logor: nativeint -> nativeint -> nativeint = "%nativeint_or"
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external logxor: nativeint -> nativeint -> nativeint = "%nativeint_xor"
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external shift_left: nativeint -> int -> nativeint = "%nativeint_lsl"
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external shift_right: nativeint -> int -> nativeint = "%nativeint_asr"
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external shift_right_logical: nativeint -> int -> nativeint = "%nativeint_lsr"
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external of_int: int -> nativeint = "%nativeint_of_int"
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external to_int: nativeint -> int = "%nativeint_to_int"
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external of_float : float -> nativeint
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= "caml_nativeint_of_float" "caml_nativeint_of_float_unboxed"
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[@@unboxed] [@@noalloc]
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external to_float : nativeint -> float
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= "caml_nativeint_to_float" "caml_nativeint_to_float_unboxed"
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[@@unboxed] [@@noalloc]
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external of_int32: int32 -> nativeint = "%nativeint_of_int32"
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external to_int32: nativeint -> int32 = "%nativeint_to_int32"
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let zero = 0n
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let one = 1n
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let minus_one = -1n
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let succ n = add n 1n
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let pred n = sub n 1n
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let abs n = if n >= 0n then n else neg n
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let size = Sys.word_size
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let min_int = shift_left 1n (size - 1)
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let max_int = sub min_int 1n
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let lognot n = logxor n (-1n)
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external format : string -> nativeint -> string = "caml_nativeint_format"
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let to_string n = format "%d" n
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external of_string: string -> nativeint = "caml_nativeint_of_string"
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let of_string_opt s =
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(* TODO: expose a non-raising primitive directly. *)
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try Some (of_string s)
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with Failure _ -> None
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type t = nativeint
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let compare (x: t) (y: t) = Stdlib.compare x y
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let equal (x: t) (y: t) = compare x y = 0
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