52 lines
1.8 KiB
OCaml
52 lines
1.8 KiB
OCaml
open Idents
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open Signature
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open Minils
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open Mls_mapfold
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(** Adds an extra equation for outputs that are also memories.
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For instance, if o is an output, then:
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o = v fby e
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becomes
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mem_o = v fby e;
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o = mem_o
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*)
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let fix_vd_ad env vd ad =
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if Env.mem vd.v_ident env then
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let x_copy = Env.find vd.v_ident env in
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{ vd with v_ident = x_copy }, { ad with a_name = Some (Idents.name x_copy) }
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else
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vd, ad
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let eq _ (outputs, eqs, env) eq = match eq.eq_lhs, eq.eq_rhs.e_desc with
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| Evarpat x, Efby _ ->
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if Mls_utils.vd_mem x outputs then
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let ty = eq.eq_rhs.e_ty in
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let ck = eq.eq_rhs.e_base_ck in
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let x_copy = Idents.gen_var "normalize_mem" ("out_"^(Idents.name x)) in
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let exp_x = mk_exp ck ~ck:ck ~ct:(Clocks.Ck ck) ty (Eextvalue (mk_extvalue ~clock:ck ~ty:ty (Wvar x))) in
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let eq_copy = { eq with eq_lhs = Evarpat x_copy; eq_rhs = exp_x } in
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let env = Env.add x x_copy env in
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eq, (outputs, eq::eq_copy::eqs, env)
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else (* this memory is not an output *)
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eq, (outputs, eq::eqs, env)
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| _, _ ->
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eq, (outputs, eq::eqs, env)
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let node funs acc nd =
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let nd, (_, eqs, env) = Mls_mapfold.node_dec funs (nd.n_output, [], Env.empty) nd in
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let v = Env.fold
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(fun x _ acc -> (Mls_utils.vd_find x nd.n_output)::acc) env nd.n_local in
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(* update the signature of the node *)
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let f = Modules.find_value nd.n_name in
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let o, sig_o = List.split (List.map2 (fix_vd_ad env) nd.n_output f.node_outputs) in
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let f = { f with node_outputs = sig_o } in
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Modules.replace_value nd.n_name f;
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(* return updated node *)
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{ nd with n_local = v; n_equs = List.rev eqs; n_output = o }, acc
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let program p =
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let funs = { Mls_mapfold.defaults with eq = eq; node_dec = node } in
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let p, _ = Mls_mapfold.program_it funs ([], [], Env.empty) p in
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p
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