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Stmt + Expr in Stack machine
This commit is contained in:
Dmitry Boulytchev
parent
d0c72844e8
commit
d8ddf25a7f
6 changed files with 125 additions and 100 deletions
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@ -9,7 +9,7 @@ check: $(TESTS)
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$(TESTS): %: %.expr
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#@$(RC) $< && cat $@.input | ./$@ > $@.log && diff $@.log orig/$@.log
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@cat $@.input | $(RC) -i $< > $@.log && diff $@.log orig/$@.log
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#@cat $@.input | $(RC) -s $< > $@.log && diff $@.log orig/$@.log
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@cat $@.input | $(RC) -s $< > $@.log && diff $@.log orig/$@.log
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clean:
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$(RM) test*.log *.s *~ $(TESTS)
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@ -9,7 +9,7 @@ check: $(TESTS)
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$(TESTS): %: %.expr
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#@RC_RUNTIME=../../runtime $(RC) $< && cat $@.input | ./$@ > $@.log && diff $@.log orig/$@.log
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@cat $@.input | $(RC) -i $< > $@.log && diff $@.log orig/$@.log
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#@cat $@.input | $(RC) -s $< > $@.log && diff $@.log orig/$@.log
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@cat $@.input | $(RC) -s $< > $@.log && diff $@.log orig/$@.log
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clean:
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rm -f *.log *.s *~
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@ -9,7 +9,7 @@ check: $(TESTS)
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$(TESTS): %: %.expr
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#@RC_RUNTIME=../../runtime $(RC) $< && cat $@.input | ./$@ > $@.log && diff $@.log orig/$@.log
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@cat $@.input | $(RC) -i $< > $@.log && diff $@.log orig/$@.log
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#@cat $@.input | $(RC) -s $< > $@.log && diff $@.log orig/$@.log
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@cat $@.input | $(RC) -s $< > $@.log && diff $@.log orig/$@.log
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clean:
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rm -f *.log *.s *~
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@ -19,7 +19,7 @@ module Value =
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@type t =
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| Empty
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| Var of string
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| Elem of t * int
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| Elem of t * int
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| Int of int
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| String of bytes
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| Array of t array
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@ -49,7 +49,12 @@ module Value =
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let update_string s i x = Bytes.set s i x; s
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let update_array a i x = a.(i) <- x; a
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let update_elem x i v =
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match x with
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| Sexp (_, a) | Array a -> ignore (update_array a i v)
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| String a -> ignore (update_string a i (Char.chr @@ to_int v))
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let string_val v =
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let buf = Buffer.create 128 in
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let append s = Buffer.add_string buf s in
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@ -148,7 +153,7 @@ module Builtin =
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let eval (st, i, o, vs) args = function
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| "read" -> (match i with z::i' -> (st, i', o, (Value.of_int z)::vs) | _ -> failwith "Unexpected end of input")
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| "write" -> (st, i, o @ [Value.to_int @@ List.hd args], vs)
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| "write" -> (st, i, o @ [Value.to_int @@ List.hd args], (*Value.Empty ::*) vs)
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| ".elem" -> let [b; j] = args in
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(st, i, o, let i = Value.to_int j in
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(match b with
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@ -265,13 +270,8 @@ module Expr =
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let update st x v =
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match x with
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| Value.Var x -> State.update x v st
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| Value.Elem (x, i) ->
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(match x with
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| Value.Sexp (_, a) | Value.Array a -> ignore (Value.update_array a i v)
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| Value.String a -> ignore (Value.update_string a i (Char.chr @@ Value.to_int v))
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);
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st
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| Value.Elem (x, i) -> Value.update_elem x i v; st
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(* Expression evaluator
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val eval : env -> config -> k -> t -> config
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@ -315,7 +315,6 @@ module Expr =
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| n -> fun h::tl -> let tl', rest = take (n-1) tl in h :: tl', rest
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let rec eval env ((st, i, o, vs) as conf) k expr =
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(*Printf.printf "eval: %s\n" (show(list) (show(Value.t)) vs); flush stdout; *)
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match expr with
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| Control f ->
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let s, conf' = f conf in
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190
src/SM.ml
190
src/SM.ml
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@ -11,14 +11,15 @@ open Language
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(* put a string on the stack *) | STRING of string
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(* create an S-expression *) | SEXP of string * int
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(* load a variable to the stack *) | LD of string
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(* store a variable from the stack *) | ST of string
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(* store in an array *) | STA of string * int
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(* load a variable address to the stack *) | LDA of string
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(* store a value into a reference *) | ST
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(* store a value into array/sexp/string *) | STA
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(* a label *) | LABEL of string
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(* unconditional jump *) | JMP of string
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(* conditional jump *) | CJMP of string * string
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(* begins procedure definition *) | BEGIN of string * string list * string list
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(* end procedure definition *) | END
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(* calls a function/procedure *) | CALL of string * int * bool
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(* calls a function/procedure *) | CALL of string * int
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(* returns from a function *) | RET of bool
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(* drops the top element off *) | DROP
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(* duplicates the top element *) | DUP
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@ -38,7 +39,7 @@ let print_prg p = List.iter (fun i -> Printf.printf "%s\n" (show(insn) i)) p
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(* The type for the stack machine configuration: control stack, stack and configuration from statement
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interpreter
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*)
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type config = (prg * State.t) list * Value.t list * ( State.t * int list * int list) (*Expr.config*)
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type config = (prg * State.t) list * Value.t list * (State.t * int list * int list)
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(* Stack machine interpreter
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@ -55,6 +56,7 @@ let split n l =
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unzip ([], l) n
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let rec eval env ((cstack, stack, ((st, i, o) as c)) as conf) = function
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(*Printf.printf "Stack: %s\n" (show(list) (show(Value.t)) stack); *)
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| [] -> conf
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| insn :: prg' ->
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(match insn with
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@ -64,15 +66,15 @@ let rec eval env ((cstack, stack, ((st, i, o) as c)) as conf) = function
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| SEXP (s, n) -> let vs, stack' = split n stack in
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eval env (cstack, (Value.sexp s @@ List.rev vs)::stack', c) prg'
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| LD x -> eval env (cstack, State.eval st x :: stack, c) prg'
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| ST x -> let z::stack' = stack in eval env (cstack, stack', (State.update x z st, i, o)) prg'
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| STA (x, n) -> let v::is, stack' = split (n+1) stack in
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eval env (cstack, stack', c (* (Language.Stmt.update st x v (List.rev is), i, o) *)) prg'
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| LDA x -> eval env (cstack, (Value.Var x) :: stack, c) prg'
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| ST -> let z::r::stack' = stack in eval env (cstack, stack', (Expr.update st r z, i, o)) prg'
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| STA -> let v::j::x::stack' = stack in eval env (cstack, stack', (Expr.update st (Value.Elem (x, Value.to_int j)) v, i, o)) prg'
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| LABEL _ -> eval env conf prg'
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| JMP l -> eval env conf (env#labeled l)
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| CJMP (c, l) -> let x::stack' = stack in eval env (cstack, stack', (st, i, o)) (if (c = "z" && Value.to_int x = 0) || (c = "nz" && Value.to_int x <> 0) then env#labeled l else prg')
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| CALL (f, n, p) -> if env#is_label f
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| CALL (f, n) -> if env#is_label f
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then eval env ((prg', st)::cstack, stack, c) (env#labeled f)
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else eval env (env#builtin conf f n p) prg'
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else eval env (env#builtin conf f n) prg'
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| BEGIN (_, args, locals) -> let vs, stack' = split (List.length args) stack in
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let state = List.combine args @@ List.rev vs in
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eval env (cstack, stack', (List.fold_left (fun s (x, v) -> State.update x v s) (State.enter st (args @ locals)) state, i, o)) prg'
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@ -125,13 +127,12 @@ let run p i =
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(object
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method is_label l = M.mem l m
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method labeled l = M.find l m
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method builtin (cstack, stack, (st, i, o)) f n p =
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method builtin (cstack, stack, (st, i, o)) f n =
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let f = match f.[0] with 'L' -> String.sub f 1 (String.length f - 1) | _ -> f in
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let args, stack' = split n stack in
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let (st, i, o, r) = Language.Builtin.eval (st, i, o, []) (List.rev args) f in
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let stack'' = if p then stack' else let [r] = r in r::stack' in
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(*Printf.printf "Builtin:\n";*)
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(cstack, stack'', (st, i, o))
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(cstack, (match r with [r] -> r::stack' | _ -> stack'), (st, i, o))
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end
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)
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([], [], (State.empty, i, []))
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@ -146,13 +147,9 @@ let run p i =
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Takes a program in the source language and returns an equivalent program for the
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stack machine
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*)
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let compile (defs, p) = invalid_arg ""
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(*
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let compile (defs, p) =
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let label s = "L" ^ s in
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let rec call f args p =
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let args_code = List.concat @@ List.map expr args in
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args_code @ [CALL (label f, List.length args, p)]
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and pattern env lfalse = function
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let rec pattern env lfalse = function
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| Pattern.Wildcard -> env, false, [DROP]
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| Pattern.Named (_, p) -> pattern env lfalse p
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| Pattern.Const c -> env, true, [CONST c; BINOP "=="; CJMP ("z", lfalse)]
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@ -179,7 +176,7 @@ let compile (defs, p) = invalid_arg ""
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List.fold_left
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(fun (i, env, code) p ->
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let env, _, pcode = pattern env ldrop p in
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i+1, env, ([DUP; CONST i; CALL (".elem", 2, false)] @ pcode) :: code
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i+1, env, ([DUP; CONST i; CALL (".elem", 2)] @ pcode) :: code
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)
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(0, env, [])
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ps
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@ -209,70 +206,99 @@ let compile (defs, p) = invalid_arg ""
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(List.map
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(fun (name, path) ->
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[DUP] @
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List.concat (List.map (fun i -> [CONST i; CALL (".elem", 2, false)]) path) @
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List.concat (List.map (fun i -> [CONST i; CALL (".elem", 2)]) path) @
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[SWAP]
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)
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(List.rev bindings)
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) @
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[DROP; ENTER (List.map fst bindings)]
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and generic_expr f = function
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| Expr.Var x -> [LD x]
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| Expr.Const n -> [CONST n]
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| Expr.String s -> [STRING s]
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| Expr.Binop (op, x, y) -> generic_expr f x @ generic_expr f y @ [BINOP op]
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| Expr.Call (fn, args) -> call fn args f
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| Expr.Array xs -> List.flatten (List.map (generic_expr f) xs) @ [CALL (".array", List.length xs, f)]
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| Expr.Sexp (t, xs) -> List.flatten (List.map (generic_expr f) xs) @ [SEXP (t, List.length xs)]
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| Expr.Elem (a, i) -> generic_expr f a @ generic_expr f i @ [CALL (".elem", 2, f)]
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| Expr.Length e -> generic_expr f e @ [CALL (".length", 1, f)]
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| Expr.StringVal e -> generic_expr f e @ [CALL (".stringval", 1, f)]
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and expr e = generic_expr false e in
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let rec compile_stmt l env = function
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| Stmt.Assign (x, [], e) -> env, false, expr e @ [ST x]
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| Stmt.Assign (x, is, e) -> env, false, List.flatten (List.map expr (is @ [e])) @ [STA (x, List.length is)]
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| Stmt.Skip -> env, false, []
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| Stmt.Seq (s1, s2) -> let l2, env = env#get_label in
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let env, flag1, s1 = compile_stmt l2 env s1 in
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let env, flag2, s2 = compile_stmt l env s2 in
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env, flag2, s1 @ (if flag1 then [LABEL l2] else []) @ s2
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| Stmt.If (c, s1, s2) -> let l2, env = env#get_label in
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let env, flag1, s1 = compile_stmt l env s1 in
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let env, flag2, s2 = compile_stmt l env s2 in
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env, true, expr c @ [CJMP ("z", l2)] @ s1 @ (if flag1 then [] else [JMP l]) @ [LABEL l2] @ s2 @ (if flag2 then [] else [JMP l])
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| Stmt.While (c, s) -> let loop, env = env#get_label in
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let cond, env = env#get_label in
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let env, _, s = compile_stmt cond env s in
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env, false, [JMP cond; LABEL loop] @ s @ [LABEL cond] @ expr c @ [CJMP ("nz", loop)]
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| Stmt.Repeat (s, c) -> let loop , env = env#get_label in
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let check, env = env#get_label in
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let env , flag, body = compile_stmt check env s in
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env, false, [LABEL loop] @ body @ (if flag then [LABEL check] else []) @ (expr c) @ [CJMP ("z", loop)]
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| Stmt.Expr e -> env, false, generic_expr true e
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(*
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| Stmt.Call (f, args) -> env, false, call f args true
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*)
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| Stmt.Return e -> env, false, (match e with Some e -> expr e | None -> []) @ [RET (e <> None)]
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| Stmt.Leave -> env, false, [LEAVE]
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| Stmt.Case (e, [p, s]) ->
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let ldrop, env = env#get_label in
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let env, ldrop' , pcode = pattern env ldrop p in
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let env, ldrop'', scode = compile_stmt ldrop env (Stmt.Seq (s, Stmt.Leave)) in
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if ldrop' || ldrop''
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then env, true , expr e @ [DUP] @ pcode @ bindings p @ scode @ [JMP l; LABEL ldrop; DROP]
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else env, false, expr e @ [DUP] @ pcode @ bindings p @ scode
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and add_code (env, flag, s) l f s' = env, f, s @ (if flag then [LABEL l] else []) @ s'
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and compile_list l env = function
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| [] -> env, false, []
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| [e] -> compile_expr l env e
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| e::es ->
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let les, env = env#get_label in
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let env, flag1, s1 = compile_expr les env e in
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let env, flag2, s2 = compile_list l env es in
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add_code (env, flag1, s1) les flag2 s2
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and compile_expr l env = function
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| Expr.ElemRef (x, i) -> compile_list l env [x; i]
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| Expr.Var x -> env, false, [LD x]
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| Expr.Ref x -> env, false, [LDA x]
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| Expr.Const n -> env, false, [CONST n]
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| Expr.String s -> env, false, [STRING s]
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| Expr.Binop (op, x, y) -> let lop, env = env#get_label in
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add_code (compile_list lop env [x; y]) lop false [BINOP op]
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| Expr.Call (f, args) -> let Expr.Var fn = f in
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let lcall, env = env#get_label in
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add_code (compile_list lcall env args) lcall false [CALL (label fn, List.length args)]
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| Stmt.Case (e, brs) ->
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let n = List.length brs - 1 in
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let env, _, _, code, _ =
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| Expr.Array xs -> let lar, env = env#get_label in
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add_code (compile_list lar env xs) lar false [CALL (".array", List.length xs)]
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| Expr.Sexp (t, xs) -> let lsexp, env = env#get_label in
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add_code (compile_list lsexp env xs) lsexp false [SEXP (t, List.length xs)]
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| Expr.Elem (a, i) -> let lelem, env = env#get_label in
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add_code (compile_list lelem env [a; i]) lelem false [CALL (".elem", 2)]
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| Expr.Length e -> let llen, env = env#get_label in
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add_code (compile_expr llen env e) llen false [CALL (".length", 1)]
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| Expr.StringVal e -> let lsv, env = env#get_label in
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add_code (compile_expr lsv env e) lsv false [CALL (".stringval", 1)]
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| Expr.Assign (x, e) -> let lassn, env = env#get_label in
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add_code (compile_list lassn env [x; e]) lassn false [match x with Expr.ElemRef _ -> STA | _ -> ST]
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| Expr.Skip -> env, false, []
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| Expr.Seq (s1, s2) -> compile_list l env [s1; s2]
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| Expr.If (c, s1, s2) -> let le, env = env#get_label in
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let l2, env = env#get_label in
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let env, fe , se = compile_expr le env c in
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let env, flag1, s1 = compile_expr l env s1 in
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let env, flag2, s2 = compile_expr l env s2 in
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env, true, se @ (if fe then [LABEL le] else []) @ [CJMP ("z", l2)] @ s1 @ (if flag1 then [] else [JMP l]) @ [LABEL l2] @ s2 @ (if flag2 then [] else [JMP l])
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| Expr.While (c, s) -> let lexp, env = env#get_label in
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let loop, env = env#get_label in
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let cond, env = env#get_label in
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let env, fe, se = compile_expr lexp env c in
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let env, _ , s = compile_expr cond env s in
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env, false, [JMP cond; LABEL loop] @ s @ [LABEL cond] @ se @ (if fe then [LABEL lexp] else []) @ [CJMP ("nz", loop)]
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| Expr.Repeat (s, c) -> let lexp , env = env#get_label in
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let loop , env = env#get_label in
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let check, env = env#get_label in
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let env, fe , se = compile_expr lexp env c in
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let env, flag, body = compile_expr check env s in
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env, false, [LABEL loop] @ body @ (if flag then [LABEL check] else []) @ se @ (if fe then [LABEL lexp] else []) @ [CJMP ("z", loop)]
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| Expr.Return (Some e) -> let lret, env = env#get_label in
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add_code (compile_expr lret env e) lret false [RET true]
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| Expr.Return None -> env, false, [RET false]
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| Expr.Leave -> env, false, [LEAVE]
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| Expr.Case (e, [p, s]) ->
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let lexp , env = env#get_label in
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let ldrop, env = env#get_label in
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let env, fe , se = compile_expr lexp env e in
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let env, ldrop' , pcode = pattern env ldrop p in
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let env, ldrop'', scode = compile_expr ldrop env (Expr.Seq (s, Expr.Leave)) in
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if ldrop' || ldrop''
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then env, true , se @ (if fe then [LABEL lexp] else []) @ [DUP] @ pcode @ bindings p @ scode @ [JMP l; LABEL ldrop; DROP]
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else env, false, se @ (if fe then [LABEL lexp] else []) @ [DUP] @ pcode @ bindings p @ scode
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| Expr.Case (e, brs) ->
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let n = List.length brs - 1 in
|
||||
let lexp, env = env#get_label in
|
||||
let env , fe , se = compile_expr lexp env e in
|
||||
let env , _, _, code, _ =
|
||||
List.fold_left
|
||||
(fun ((env, lab, i, code, continue) as acc) (p, s) ->
|
||||
if continue
|
||||
|
|
@ -283,17 +309,17 @@ let compile (defs, p) = invalid_arg ""
|
|||
else env#get_label, [JMP l]
|
||||
in
|
||||
let env, lfalse', pcode = pattern env lfalse p in
|
||||
let env, l' , scode = compile_stmt l env (Stmt.Seq (s, Stmt.Leave)) in
|
||||
let env, l' , scode = compile_expr l env (Expr.Seq (s, Expr.Leave)) in
|
||||
(env, Some lfalse, i+1, ((match lab with None -> [] | Some l -> [LABEL l; DUP]) @ pcode @ bindings p @ scode @ jmp) :: code, lfalse')
|
||||
else acc
|
||||
)
|
||||
(env, None, 0, [], true) brs
|
||||
in
|
||||
env, true, expr e @ [DUP] @ (List.flatten @@ List.rev code) @ [JMP l]
|
||||
env, true, se @ (if fe then [LABEL lexp] else []) @ [DUP] @ (List.flatten @@ List.rev code) @ [JMP l]
|
||||
in
|
||||
let compile_def env (name, (args, locals, stmt)) =
|
||||
let lend, env = env#get_label in
|
||||
let env, flag, code = compile_stmt lend env stmt in
|
||||
let env, flag, code = compile_expr lend env stmt in
|
||||
env,
|
||||
[LABEL name; BEGIN (name, args, locals)] @
|
||||
code @
|
||||
|
|
@ -313,7 +339,5 @@ let compile (defs, p) = invalid_arg ""
|
|||
defs
|
||||
in
|
||||
let lend, env = env#get_label in
|
||||
let _, flag, code = compile_stmt lend env p in
|
||||
let _, flag, code = compile_expr lend env p in
|
||||
(if flag then code @ [LABEL lend] else code) @ [END] @ (List.concat def_code)
|
||||
|
||||
*)
|
||||
|
|
|
|||
|
|
@ -174,7 +174,8 @@ let compile env code =
|
|||
| S _ | M _ -> [Mov (env'#loc x, eax); Mov (eax, s)]
|
||||
| _ -> [Mov (env'#loc x, s)]
|
||||
)
|
||||
|
||||
|
||||
(* TODO
|
||||
| STA (x, n) ->
|
||||
let s, env = (env#variable x)#allocate in
|
||||
let push =
|
||||
|
|
@ -192,7 +193,8 @@ let compile env code =
|
|||
| S _ | M _ -> [Mov (s, eax); Mov (eax, env'#loc x)]
|
||||
| _ -> [Mov (s, env'#loc x)]
|
||||
)
|
||||
|
||||
*)
|
||||
|
||||
| BINOP op ->
|
||||
let x, y, env' = env#pop2 in
|
||||
env'#push y,
|
||||
|
|
@ -313,7 +315,7 @@ let compile env code =
|
|||
then let x, env = env#pop in env, [Mov (x, eax); Jmp env#epilogue]
|
||||
else env, [Jmp env#epilogue]
|
||||
|
||||
| CALL (f, n, p) -> call env f n p
|
||||
| CALL (f, n) -> call env f n (* p *) false (* TODO!!! *)
|
||||
|
||||
| SEXP (t, n) ->
|
||||
let s, env = env#allocate in
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue