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|
open Netlist_ast
(* module Idm = Map.Make (String) *)
module Idm = Env
type calc =
| Id of (ident * int)
| Eq of (equation list -> int Idm.t -> arg * int * equation list * int Idm.t)
| Const of (bool array)
let id =
let cnt = ref 0 in
fun n ->
let res = n ^ "_xoxo_" ^ (string_of_int !cnt) in
incr cnt; res
let value n =
let l = String.length n in
ref (Const (Array.init l (fun i -> n.[i] = '1')))
let calc eqs vars e =
match !e with
| Id (id,t) -> Avar id,t,eqs,vars
| Eq c ->
let arg,t,eqs,vars = c eqs vars in
let () =
match arg with
| Avar id -> e := Id (id,t)
| Aconst v -> e := Const v in
arg,t,eqs,vars
| Const v -> Aconst v,(Array.length v),eqs,vars
let ( ++ ) a b =
ref (Eq (fun eqs vars ->
let arga,ta,eqs,vars = calc eqs vars a in
let argb,tb,eqs,vars = calc eqs vars b in
let res = id "" in
Avar res, (ta+tb), (res,Econcat (arga, argb))::eqs, Idm.add res (ta+tb) vars))
let ( ^^ ) a b = ref (Eq (fun eqs vars ->
let arga,ta,eqs,vars = calc eqs vars a in
let argb,tb,eqs,vars = calc eqs vars b in
if ta = tb then
let res = id "" in
Avar res, (ta), (res,Ebinop (Xor,arga, argb))::eqs, Idm.add res (ta) vars
else assert false))
let ( ^| ) a b = ref (Eq (fun eqs vars ->
let arga,ta,eqs,vars = calc eqs vars a in
let argb,tb,eqs,vars = calc eqs vars b in
if ta = tb then
let res = id "" in
Avar res, (ta), (res,Ebinop (Or,arga, argb))::eqs, Idm.add res (ta) vars
else assert false))
let ( ^& ) a b = ref (Eq (fun eqs vars ->
let arga,ta,eqs,vars = calc eqs vars a in
let argb,tb,eqs,vars = calc eqs vars b in
if ta = tb then
let res = id "" in
Avar res, (ta), (res,Ebinop (And,arga, argb))::eqs, Idm.add res (ta) vars
else assert false))
let ( ^$ ) a b = ref (Eq (fun eqs vars ->
let arga,ta,eqs,vars = calc eqs vars a in
let argb,tb,eqs,vars = calc eqs vars b in
if ta = tb then
let res = id "" in
Avar res, (ta), (res,Ebinop (Nand,arga, argb))::eqs, Idm.add res (ta) vars
else assert false))
let not a = ref (Eq (fun eqs vars ->
let arga,ta,eqs,vars = calc eqs vars a in
let res = id "" in
Avar res, ta, (res,Enot arga)::eqs, Idm.add res ta vars))
let mux a b c = ref (Eq (fun eqs vars ->
let arga,ta,eqs,vars = calc eqs vars a in
let argb,tb,eqs,vars = calc eqs vars b in
let argc,tc,eqs,vars = calc eqs vars c in
if ta = 1 && tb = tc then
let res = id "" in
Avar res, tb, (res,Emux (arga,argb,argc))::eqs, Idm.add res tb vars
else assert false))
let ( ** ) a n = ref (Eq (fun eqs vars ->
let arga,ta,eqs,vars = calc eqs vars a in
if n >= ta then assert false
else if ta = 1 then arga,ta,eqs,vars
else let res = id "" in
Avar res, 1, (res,Eselect (n,arga))::eqs, Idm.add res 1 vars))
let ( % ) a (i,j) = ref (Eq (fun eqs vars ->
let arga,ta,eqs,vars = calc eqs vars a in
if j > ta then assert false
else if i > j then assert false
else if j-i+1 = ta then arga,ta,eqs,vars
else let res = id "" in
Avar res, (j-i+1), (res,Eslice (i,j,arga))::eqs, Idm.add res (j-i+1) vars))
let rom name a_s w_s a = ref (Eq (fun eqs vars ->
let arga,ta,eqs,vars = calc eqs vars a in
if ta = a_s && w_s > 0 then
let res = id name in
Avar res, w_s, (res,Erom (a_s,w_s,arga))::eqs, Idm.add res w_s vars
else assert false))
let ram a_s w_s ra we wa d = ref (Eq (fun eqs vars ->
let argra,tra,eqs,vars = calc eqs vars ra in
let argwe,twe,eqs,vars = calc eqs vars we in
let argwa,twa,eqs,vars = calc eqs vars wa in
let argd,td,eqs,vars = calc eqs vars d in
if tra = a_s && twa = a_s && td = w_s && twe = 1 then
let res = id "" in
Avar res, w_s, (res,Eram (a_s,w_s,argra,argwe,argwa,argd))::eqs, Idm.add res w_s vars
else assert false))
let init_string n f =
let s = String.make n 'a' in
for i = 0 to n - 1 do
s.[i] <- f i
done;
s
(* value to string *)
let vts bits =
init_string (Array.length bits) (fun i ->
if bits.(i) then '1' else '0')
(* argument to string *)
let ats = function
| Avar id -> id
| Aconst n -> vts n
let s_op = function
| Or -> "OR"
| Xor -> "XOR"
| And -> "AND"
| Nand -> "NAND"
let print oc p =
let print_eq oc (s,e) =
let s_e =
match e with
| Earg a -> ats a
| Ereg s -> "REG " ^ s
| Enot a -> "NOT " ^ (ats a)
| Ebinop (b,a1,a2) -> (s_op b) ^ " " ^ (ats a1) ^ " " ^ (ats a2)
| Emux (a1,a2,a3) ->
"MUX " ^ (ats a1) ^ " " ^ (ats a2) ^ " " ^ (ats a3)
| Erom (n1,n2,a3) ->
"ROM " ^ (string_of_int n1) ^ " " ^ (string_of_int n2) ^
" " ^ (ats a3)
| Eram (n1,n2,a3,a4,a5,a6) ->
"RAM " ^ (string_of_int n1) ^ " " ^ (string_of_int n2) ^
" " ^ (ats a3) ^ " " ^ (ats a4) ^ " " ^ (ats a5) ^
" " ^ (ats a6)
| Econcat (a1,a2) -> "CONCAT " ^ (ats a1) ^ " " ^ (ats a2)
| Eslice (n1,n2,a3) -> "SLICE " ^ (string_of_int n1) ^ " " ^
(string_of_int n2) ^ " " ^ (ats a3)
| Eselect (n,a) -> "SELECT " ^ (string_of_int n) ^ " " ^ (ats a) in
Printf.fprintf oc "%s = %s\n" s s_e in
Printf.fprintf oc "INPUT ";
if p.p_inputs <> [] then
(Printf.fprintf oc "%s" (List.hd p.p_inputs); List.iter
(Printf.fprintf oc ", %s") (List.tl p.p_inputs));
Printf.fprintf oc "\nOUTPUT ";
if p.p_outputs <> [] then
(Printf.fprintf oc "%s" (List.hd p.p_outputs); List.iter
(Printf.fprintf oc ", %s") (List.tl p.p_outputs));
Printf.fprintf oc "\nVAR ";
let stts s t = if t = 1 then s else s ^ " : " ^ (string_of_int t) in
ignore (Idm.fold (fun s t b ->
if b then Printf.fprintf oc "%s" (stts s t)
else Printf.fprintf oc ", %s" (stts s t);
false) p.p_vars true);
Printf.fprintf oc "\nIN\n";
List.iter (print_eq oc) p.p_eqs
|
