1 files changed, 169 insertions, 0 deletions
diff --git a/test/ocaml/sail_lib.ml b/test/ocaml/sail_lib.ml
new file mode 100644
index 00000000..e287eadb
--- /dev/null
+++ b/test/ocaml/sail_lib.ml
@@ -0,0 +1,169 @@
+open Big_int
+
+type 'a return = { return : 'b . 'a -> 'b }
+
+let with_return (type t) (f : _ -> t) =
+  let module M =
+    struct exception Return of t end
+  in
+  let return = { return = (fun x -> raise (M.Return x)); } in
+  try f return with M.Return x -> x
+
+type bit = B0 | B1
+
+let and_bit = function
+  | B1, B1 -> B1
+  | _, _ -> B0
+
+let or_bit = function
+  | B0, B0 -> B0
+  | _, _ -> B1
+
+let and_vec (xs, ys) =
+  assert (List.length xs = List.length ys);
+  List.map2 (fun x y -> and_bit (x, y)) xs ys
+
+let and_bool (b1, b2) = b1 && b2
+
+let or_vec (xs, ys) =
+  assert (List.length xs = List.length ys);
+  List.map2 (fun x y -> or_bit (x, y)) xs ys
+
+let or_bool (b1, b2) = b1 || b2
+
+let undefined_bit () =
+  if Random.bool () then B0 else B1
+
+let undefined_bool () = Random.bool ()
+
+let rec undefined_vector (start_index, len, item) =
+  if eq_big_int len zero_big_int
+  then []
+  else item :: undefined_vector (start_index, sub_big_int len unit_big_int, item)
+
+let undefined_string () = ""
+
+let undefined_unit () = ()
+
+let undefined_int () =
+  big_int_of_int (Random.int 0xFFFF)
+
+let internal_pick list =
+  List.nth list (Random.int (List.length list))
+
+let eq_int (n, m) = eq_big_int n m
+
+let eq_string (str1, str2) = String.compare str1 str2 = 0
+
+let concat_string (str1, str2) = str1 ^ str2
+
+let rec drop n xs =
+  match n, xs with
+  | 0, xs -> xs
+  | n, [] -> []
+  | n, (x :: xs) -> drop (n -1) xs
+
+let rec take n xs =
+  match n, xs with
+  | 0, xs -> []
+  | n, (x :: xs) -> x :: take (n - 1) xs
+  | n, [] -> []
+
+let subrange (list, n, m) =
+  let n = int_of_big_int n in
+  let m = int_of_big_int m in
+  List.rev (take (n - (m - 1)) (drop m (List.rev list)))
+
+let eq_list (xs, ys) = List.for_all2 (fun x y -> x == y) xs ys
+
+let access (xs, n) = List.nth (List.rev xs) (int_of_big_int n)
+
+let append (xs, ys) = xs @ ys
+
+let update (xs, n, x) =
+  let n = int_of_big_int n in
+  take n xs @ [x] @ drop (n + 1) xs
+
+let update_subrange (xs, n, m, ys) =
+  let n = int_of_big_int n in
+  let m = int_of_big_int m in
+  assert false
+
+let length xs = big_int_of_int (List.length xs)
+
+let big_int_of_bit = function
+  | B0 -> zero_big_int
+  | B1 -> unit_big_int
+
+let uint xs =
+  let uint_bit x (n, pos) =
+    add_big_int n (mult_big_int (power_int_positive_int 2 pos) (big_int_of_bit x)), pos + 1
+  in
+  fst (List.fold_right uint_bit xs (zero_big_int, 0))
+
+let sint = function
+  | [] -> zero_big_int
+  | [msb] -> minus_big_int (big_int_of_bit msb)
+  | msb :: xs ->
+     let msb_pos = List.length xs in
+     let complement =
+       minus_big_int (mult_big_int (power_int_positive_int 2 msb_pos) (big_int_of_bit msb))
+     in
+     add_big_int complement (uint xs)
+
+let add (x, y) = add_big_int x y
+let sub (x, y) = sub_big_int x y
+let mult (x, y) = mult_big_int x y
+let quotient (x, y) = fst (quomod_big_int x y)
+let modulus (x, y) = snd (quomod_big_int x y)
+
+let add_bit_with_carry (x, y, carry) =
+  match x, y, carry with
+  | B0, B0, B0 -> B0, B0
+  | B0, B1, B0 -> B1, B0
+  | B1, B0, B0 -> B1, B0
+  | B1, B1, B0 -> B0, B1
+  | B0, B0, B1 -> B1, B0
+  | B0, B1, B1 -> B0, B1
+  | B1, B0, B1 -> B0, B1
+  | B1, B1, B1 -> B1, B1
+
+let not_bit = function
+  | B0 -> B1
+  | B1 -> B0
+
+let not_vec xs = List.map not_bit xs
+
+let add_vec_carry (xs, ys) =
+  assert (List.length xs = List.length ys);
+  let (carry, result) =
+    List.fold_right2 (fun x y (c, result) -> let (z, c) = add_bit_with_carry (x, y, c) in (c, z :: result)) xs ys (B0, [])
+  in
+  carry, result
+
+let add_vec (xs, ys) = snd (add_vec_carry (xs, ys))
+
+let rec replicate_bits (bits, n) =
+  if eq_big_int n zero_big_int
+  then []
+  else bits @ replicate_bits (bits, sub_big_int n unit_big_int)
+
+let identity x = x
+
+let get_slice_int (n, m, o) = assert false
+
+let hex_slice (str, n, m) = assert false
+
+let putchar n = print_endline (string_of_big_int n)
+
+let write_ram (addr_size, data_size, hex_ram, addr, data) =
+  assert false
+
+let read_ram (addr_size, data_size, hex_ram, addr) =
+  assert false
+
+(* FIXME: Casts can't be externed *)
+let zcast_unit_vec x = [x]
+
+let shl_int (n, m) = assert false
+let shr_int (n, m) = assert false