Source file component.ml
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open! Import
include Component_intf
type ('i, 'o) t_module = (module S with type Input.t = 'i and type Output.t = 'o)
type ('i, 'o) t_ = ('i, 'o) t_module
type ('i, 'o) t = T of ('i, 'o) t_
let create t = T t
let create_combinational (type i o) ((module T) : (i, o) Combinational.t) =
create
(module struct
include T
let update_state _ _ = ()
end)
;;
let input_module (type i o) (T (module T) : (i, o) t) : i Data.t = (module T.Input)
let output_module (type i o) (T (module T) : (i, o) t) : o Data.t = (module T.Output)
let sexp_of_input (type i o) (T (module T) : (i, o) t) = T.Input.sexp_of_t
let sexp_of_output (type i o) (T (module T) : (i, o) t) = T.Output.sexp_of_t
let sexp_of_t (type i o) _ _ (T (module T) : (i, o) t) =
[%message "" ~_:(T.created_at : Source_code_position.t) ~_:(T.t : T.t)]
;;
let output (type i o) (T (module T) : (i, o) t) input = T.(output t) input
let update_state (type i o) (T (module T) : (i, o) t) input = T.(update_state t) input
let run_with_inputs t is =
List.fold is ~init:[] ~f:(fun os i ->
update_state t i;
(i, output t i) :: os)
|> List.rev
;;
module Next_input = struct
type 'i t =
| Finished
| Input of 'i
[@@deriving sexp_of]
end
let run_until_finished
?(show_steps = false)
t
~first_input
~(next_input : _ -> _ Next_input.t)
=
let step_number = ref 0 in
let rec loop input =
if show_steps then print_s [%message "" ~step_number:(!step_number : int)];
incr step_number;
update_state t input;
let output = output t input in
match next_input output with
| Finished -> ()
| Input i -> loop i
in
loop first_input
;;
let sequence
(type a b c)
(T (module T1) as t1 : (a, b) t)
(T (module T2) as t2 : (b, c) t)
: (a, c) t
=
T
(module struct
module Input = T1.Input
module Output = T2.Output
type nonrec t = (T1.Input.t, T1.Output.t) t * (T2.Input.t, T2.Output.t) t
[@@deriving sexp_of]
let t = t1, t2
let created_at = [%here]
let update_state ((t1, t2) : t) input =
let b = output t1 input in
update_state t1 input;
update_state t2 b
;;
let output (t1, t2) input = output t2 (output t1 input)
end)
;;
let map_input
(type i1 i2 o)
(T (module T) : (i2, o) t)
(module Input : Data.S with type t = i1)
~f
=
T
(module struct
module Input = Input
module Output = T.Output
type t = T.t [@@deriving sexp_of]
let t = T.t
let created_at = [%here]
let output t i1 = T.output t (f i1)
let update_state t i1 = T.update_state t (f i1)
end)
;;
let map_output
(type i o1 o2)
(T (module T) : (i, o1) t)
(module Output : Data.S with type t = o2)
~f
=
T
(module struct
module Input = T.Input
module Output = Output
type t = T.t [@@deriving sexp_of]
let t = T.t
let created_at = [%here]
let output t i = f (T.output t i)
let update_state t i = T.update_state t i
end)
;;
let create_binary_bool sexp f =
create_combinational
(module struct
module Input = Data.Pair (Data.Bool) (Data.Bool)
module Output = Data.Bool
type t = unit
let sexp_of_t () = sexp
let created_at = [%here]
let t = ()
let output () (b1, b2) = f b1 b2
end)
;;
let and_ = create_binary_bool [%message "and"] (fun b1 b2 -> b1 && b2)
let or_ = create_binary_bool [%message "or"] (fun b1 b2 -> b1 || b2)
let create_unary_bool sexp f =
create_combinational
(module struct
module Input = Data.Bool
module Output = Data.Bool
type t = unit
let sexp_of_t () = sexp
let created_at = [%here]
let t = ()
let output () b = f b
end)
;;
let not_ = create_unary_bool [%message "not"] (fun b -> not b)
let flip_flop () =
create
(module struct
module Input = Data.Bool
module Output = Data.Bool
type t = bool ref [@@deriving sexp_of]
let sexp_of_t t = [%message "Flip_flop" ~_:(t : t)]
let t = ref Output.undefined
let created_at = [%here]
let output t _ = !t
let update_state t b = t := b
end)
;;
module Flip_flop_with_load_enable = struct
module Input = struct
type t =
{ input : bool
; load_enable : bool
}
[@@deriving compare, sexp_of]
let equal = [%compare.equal: t]
let undefined = { input = Data.Bool.undefined; load_enable = Data.Bool.undefined }
end
module Output = Data.Bool
let create () =
create
(module struct
module Input = Input
module Output = Output
type t = bool ref [@@deriving sexp_of]
let t = ref Output.undefined
let sexp_of_t t = [%message "Flip_flop_with_load_enable" ~_:(t : t)]
let created_at = [%here]
let output t _ = !t
let update_state t { Input.input; load_enable } = if load_enable then t := input
end)
;;
end
module Flip_flop_with_load_enable_and_reset = struct
module Input = struct
type t =
{ input : bool
; load_enable : bool
; reset : bool
}
[@@deriving compare, sexp_of]
let equal = [%compare.equal: t]
let undefined =
{ input = Data.Bool.undefined
; load_enable = Data.Bool.undefined
; reset = Data.Bool.undefined
}
;;
end
module Output = Data.Bool
let create () =
create
(module struct
module Input = Input
module Output = Output
type t = bool ref [@@deriving sexp_of]
let t = ref Output.undefined
let sexp_of_t t = [%message "Flip_flop_with_load_enable_and_reset" ~_:(t : t)]
let created_at = [%here]
let output t _ = !t
let update_state t { Input.input; load_enable; reset } =
if reset then t := false else if load_enable then t := input
;;
end)
;;
end