56 lines
2.6 KiB
OCaml
56 lines
2.6 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Objective Caml *)
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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. All rights reserved. This file is distributed *)
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(* under the terms of the GNU Library General Public License, with *)
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(* the special exception on linking described in file ../LICENSE. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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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 = "nativeint_of_float"
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external to_float : nativeint -> float = "nativeint_to_float"
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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 = of_int 0
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let one = of_int 1
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let minus_one = of_int (-1)
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let succ n = add n one
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let pred n = sub n one
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let abs n = if n >= zero then n else neg n
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let size = Sys.word_size
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let min_int = shift_left one (size - 1)
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let max_int = sub min_int one
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let lognot n = logxor n minus_one
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external format : string -> nativeint -> string = "nativeint_format"
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let to_string n = format "%d" n
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external of_string: string -> nativeint = "nativeint_of_string"
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type t = nativeint
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let compare = (Pervasives.compare: t -> t -> int)
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