40 lines
1.6 KiB
OCaml
40 lines
1.6 KiB
OCaml
open Naked
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open Abstract_syntax_tree
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module Constants : NAKED_VALUE_DOMAIN = struct
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type t = Z.t
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let const z = z
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let rand z w = raise NeedTop (* We know rand is never called on singletons *)
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let minus z = Z.neg z
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let binary a b op = match op with
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| AST_PLUS -> Z.add a b
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| AST_MINUS -> Z.sub a b
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| AST_MULTIPLY -> Z.mul a b
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| AST_DIVIDE -> (try(Z.div a b)with Division_by_zero -> raise Absurd)
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| AST_MODULO -> Z.rem a b
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let is_only_zero z = Z.equal (Z.zero) z
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let multiples_of z = if Z.equal Z.zero z then Z.zero else raise NeedTop
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let divisors_of z = if Z.equal Z.zero z then Z.zero else raise NeedTop
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let remainders z = if Z.equal Z.zero z then Z.zero else raise NeedTop
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let convex_sym z = if Z.equal Z.zero z then Z.zero else raise NeedTop
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let compatible z op = match op with
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| AST_EQUAL -> z
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| _ -> raise NeedTop
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let compare z w op = match op with
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| AST_EQUAL -> if Z.equal z w then z,w else raise Absurd
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| AST_NOT_EQUAL -> if Z.equal z w then raise Absurd else z,w
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| AST_LESS -> if Z.lt z w then z,w else raise Absurd
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| AST_LESS_EQUAL -> if Z.leq z w then z,w else raise Absurd
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| AST_GREATER -> if Z.gt z w then z,w else raise Absurd
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| AST_GREATER_EQUAL -> if Z.geq z w then z,w else raise Absurd
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let bwd_binary x y op r = if Z.equal (binary x y op) r then x,y else raise Absurd
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let join x y = if Z.equal x y then x else raise NeedTop
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let meet x y = if Z.equal x y then x else raise Absurd
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let widen x y = if Z.equal x y then x else raise NeedTop
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let narrow x y = if Z.equal x y then x else raise Absurd
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let subset x y = Z.equal x y
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let print out x = Z.pp_print out x
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end
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