Revision 679f3339fbf7cecebb5890c288ea86db85563ef1 authored by Pierre-Yves Strub on 17 May 2019, 05:46:17 UTC, committed by Pierre-Yves Strub on 17 May 2019, 05:46:17 UTC
1 parent a79235c
ecAlgTactic.ml
(* --------------------------------------------------------------------
* Copyright (c) - 2012--2016 - IMDEA Software Institute
* Copyright (c) - 2012--2018 - Inria
* Copyright (c) - 2012--2018 - Ecole Polytechnique
*
* Distributed under the terms of the CeCILL-C-V1 license
* -------------------------------------------------------------------- *)
(* -------------------------------------------------------------------- *)
open EcUtils
open EcTypes
open EcFol
open EcDecl
open EcCoreGoal
open EcAlgebra
(* -------------------------------------------------------------------- *)
module Axioms = struct
open EcDecl
let tmod = EcPath.fromqsymbol ([EcCoreLib.i_top; "AlgTactic"], "Requires")
let tname = "domain"
let tmod_and_deps =
tmod :: [
EcPath.fromqsymbol ([EcCoreLib.i_top; "Ring"], "Field")
]
let zero = "rzero"
let one = "rone"
let add = "add"
let opp = "opp"
let sub = "sub"
let mul = "mul"
let inv = "inv"
let div = "div"
let expr = "expr"
let embed = "ofint"
let cN = "Cn"
let cP = "Cp"
let core_add = ["oner_neq0"; "addr0"; "addrA"; "addrC";]
let core_mul = [ "mulr1"; "mulrA"; "mulrC"; "mulrDl"]
let core = core_add @ "addrN" :: core_mul
let core_bool = core_add @ "addrK" :: "mulrK" :: core_mul
let ofoppbool = ["oppr_id"]
let intpow = ["expr0"; "exprS"]
let ofint = ["ofint0"; "ofint1"; "ofintS"; "ofintN"]
let ofsub = ["subrE"]
let field = ["mulrV"; "exprN"]
let ofdiv = ["divrE"]
let cNax = ["Cn_eq0"]
let cPax = ["Cp_idp"]
let ty0 ty = ty
let ty1 ty = tfun ty (ty0 ty)
let ty2 ty = tfun ty (ty1 ty)
let ring_symbols env kind ty =
let reqopp = not (kind = `Boolean) in
let symbols =
[(zero, (true , ty0 ty));
(one , (true , ty0 ty));
(add , (true , ty2 ty));
(opp , (reqopp, ty1 ty));
(sub , (false , ty2 ty));
(mul , (true , ty2 ty));
(expr, (false , toarrow [ty; tint] ty))]
in
if EcReduction.EqTest.for_type env ty tint
then symbols
else symbols @ [(embed, (false, tfun tint ty))]
let field_symbols env ty =
(ring_symbols env `Integer ty)
@ [(inv, (true , ty1 ty));
(div, (false, ty2 ty))]
let subst_of_ring (cr : ring) =
let crcore = [(zero, cr.r_zero);
(one , cr.r_one );
(add , cr.r_add );
(mul , cr.r_mul ); ] in
let xpath = fun x -> EcPath.pqname tmod x in
let add = fun subst x p -> EcSubst.add_path subst (xpath x) p in
let addctt = fun subst x f -> EcSubst.add_opdef subst (xpath x) ([], f) in
let subst =
EcSubst.add_tydef EcSubst.empty (xpath tname) ([], cr.r_type) in
let subst =
List.fold_left (fun subst (x, p) -> add subst x p) subst crcore in
let subst = odfl subst (cr.r_opp |> omap (fun p -> add subst opp p)) in
let subst = odfl subst (cr.r_sub |> omap (fun p -> add subst sub p)) in
let subst = odfl subst (cr.r_exp |> omap (fun p -> add subst expr p)) in
let subst =
match cr.r_kind with
| `Boolean | `Integer -> subst
| `Modulus (c, p) ->
let subst = odfl subst (c |> omap (fun c -> addctt subst cN (e_int c))) in
let subst = odfl subst (p |> omap (fun p -> addctt subst cP (e_int p))) in
subst
in
let subst =
match cr.r_embed with
| `Direct | `Default -> subst
| `Embed p -> add subst embed p
in
subst
let subst_of_field (cr : field) =
let xpath = fun x -> EcPath.pqname tmod x in
let add = fun subst x p -> EcSubst.add_path subst (xpath x) p in
let subst = subst_of_ring cr.f_ring in
let subst = add subst inv cr.f_inv in
let subst = odfl subst (cr.f_div |> omap (fun p -> add subst div p)) in
subst
(* FIXME: should use operators inlining when available *)
let get cr env axs =
let subst =
match cr with
| `Ring cr -> subst_of_ring cr
| `Field cr -> subst_of_field cr
in
let for1 axname =
let ax = EcEnv.Ax.by_path (EcPath.pqname tmod axname) env in
assert (ax.ax_tparams = [] && is_axiom ax.ax_kind);
(axname, EcSubst.subst_form subst ax.ax_spec)
in
List.map for1 axs
let getr env cr axs = get (`Ring cr) env axs
let getf env cr axs = get (`Field cr) env axs
let ring_axioms env (cr : ring) =
let axcore =
match cr.r_kind with
| `Boolean -> getr env cr core_bool
| `Integer -> getr env cr core
| `Modulus _ -> getr env cr core in
let axint =
match cr.r_embed with
| `Direct | `Default -> [] | `Embed _ -> getr env cr ofint in
let axopp =
match cr.r_opp with
| Some _ when cr.r_kind = `Boolean -> getr env cr ofoppbool
| _ -> [] in
let axsub =
match cr.r_sub with None -> [] | Some _ -> getr env cr ofsub in
let axexp =
match cr.r_exp with None -> [] | Some _ -> getr env cr intpow in
let axCnp =
match cr.r_kind with
| `Boolean | `Integer -> []
| `Modulus (c, p) ->
(odfl [] (c |> omap (fun _ -> getr env cr cNax)))
@ (odfl [] (p |> omap (fun _ -> getr env cr cPax)))
in
List.flatten [axcore; axopp; axexp; axint; axsub; axCnp]
let field_axioms env (cr : field) =
let axring = ring_axioms env cr.f_ring in
let axcore = getf env cr field in
let axdiv = match cr.f_div with None -> [] | Some _ -> getf env cr ofdiv in
List.flatten [axring; axcore; axdiv]
end
let ring_symbols = Axioms.ring_symbols
let field_symbols = Axioms.field_symbols
let ring_axioms = Axioms.ring_axioms
let field_axioms = Axioms.field_axioms
(* -------------------------------------------------------------------- *)
let is_module_loaded env =
List.for_all
(fun x -> EcEnv.Theory.by_path_opt x env <> None)
Axioms.tmod_and_deps
(* -------------------------------------------------------------------- *)
let t_ring_simplify cr eqs (f1, f2) tc =
let hyps = FApi.tc1_hyps tc in
let cr = cring_of_ring cr in
let f1 = ring_simplify hyps cr eqs f1 in
let f2 = ring_simplify hyps cr eqs f2 in
FApi.xmutate1 tc `Ring [f_eq f1 f2]
let t_ring r eqs (f1, f2) tc =
let hyps = FApi.tc1_hyps tc in
let cr = cring_of_ring r in
let f = ring_eq hyps cr eqs f1 f2 in
if EcReduction.is_conv hyps f (emb_rzero r)
then FApi.xmutate1 tc `Ring []
else FApi.xmutate1 tc `Ring [f_eq f (emb_rzero r)]
let t_ring_congr (cr:cring) (rm:RState.rstate) li lv tc =
let r = ring_of_cring cr in
let concl = FApi.tc1_goal tc in
let f1,f2 = try destr_eq concl with DestrError _ -> raise InvalidGoalShape in
let pe, rm = toring (FApi.tc1_hyps tc) cr rm f1 in
let rm' = RState.update rm li lv in
let f2' = ofring r rm' pe in
if not (f_equal f2 f2') then raise InvalidGoalShape;
let env = FApi.tc1_env tc in
let mk_goal i =
let r1 = oget (RState.get i rm) in
let r2 = oget (RState.get i rm') in
EcReduction.EqTest.for_type_exn env r1.f_ty r2.f_ty;
f_eq r1 r2 in
FApi.xmutate1 tc `Ring_congr (List.map mk_goal li)
(* -------------------------------------------------------------------- *)
let t_field_simplify r eqs (f1, f2) tc =
let hyps = FApi.tc1_hyps tc in
let cr = cfield_of_field r in
let (c1, (n1, d1)) = field_simplify hyps cr eqs f1 in
let (c2, (n2, d2)) = field_simplify hyps cr eqs f2 in
let c = List.map (fun f -> f_not (f_eq f (emb_fzero r))) (c1 @ c2) in
let f = f_eq (fdiv r n1 d1) (fdiv r n2 d2) in
FApi.xmutate1 tc `Field (c @ [f])
let t_field r eqs (f1, f2) tc =
let hyps = FApi.tc1_hyps tc in
let cr = cfield_of_field r in
let (c, ((n1, n2), (d1, d2))) = field_eq hyps cr eqs f1 f2 in
let c = Sf.undup (List.map (fun f -> f_not (f_eq f (emb_fzero r))) c) in
let r1 = fmul r n1 d2
and r2 = fmul r n2 d1 in
let f = ring_eq hyps (cring_of_ring r.f_ring) eqs r1 r2 in
if EcReduction.is_conv hyps f (emb_fzero r)
then FApi.xmutate1 tc `Field c
else FApi.xmutate1 tc `Field (c @ [f_eq f (emb_fzero r)])
let t_field_congr (cr:cfield) (rm:RState.rstate) li lv tc =
let r = field_of_cfield cr in
let concl = FApi.tc1_goal tc in
let f1,f2 = try destr_eq concl with DestrError _ -> raise InvalidGoalShape in
let pe, rm = tofield (FApi.tc1_hyps tc) cr rm f1 in
let rm' = RState.update rm li lv in
let f2' = offield r rm' pe in
if not (f_equal f2 f2') then raise InvalidGoalShape;
let env = FApi.tc1_env tc in
let mk_goal i =
let r1 = oget (RState.get i rm) in
let r2 = oget (RState.get i rm') in
EcReduction.EqTest.for_type_exn env r1.f_ty r2.f_ty;
f_eq r1 r2 in
FApi.xmutate1 tc `Field_congr (List.map mk_goal li)
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