Add generic prelude library that pulls in various basic sail

definitions from sail/lib.

2 files changed, 11 insertions, 0 deletions

diff --git a/src/gen_lib/sail_values.lem b/src/gen_lib/sail_values.lem
index a89456b9..2fe69211 100644
--- a/src/gen_lib/sail_values.lem
+++ b/src/gen_lib/sail_values.lem
@@ -276,6 +276,8 @@ let ext_list pad len xs =
   if longer < 0 then drop (nat_of_int (abs (longer))) xs
   else pad_list pad xs longer
 
+let vector_truncate bs len = ext_list B0 len bs
+
 let extz_bools len bs = ext_list false len bs
 let exts_bools len bs =
   match bs with
@@ -341,6 +343,8 @@ let exts_bits len bits =
   | _ -> ext_list B0 len bits
   end
 
+let zero_extend bits len = extz_bits len bits
+
 let rec add_one_bit_ignore_overflow_aux bits = match bits with
   | [] -> []
   | B0 :: bits -> B1 :: bits
diff --git a/src/process_file.ml b/src/process_file.ml
index 3f24f4c3..88220841 100644
--- a/src/process_file.ml
+++ b/src/process_file.ml
@@ -162,6 +162,13 @@ let rec preprocess = function
   | Parse_ast.DEF_pragma (p, arg, _) :: defs ->
      (Util.warn ("Bad pragma $" ^ p ^ " " ^ arg); preprocess defs)
 
+  | (Parse_ast.DEF_default (Parse_ast.DT_aux (Parse_ast.DT_order (_, Parse_ast.ATyp_aux (atyp, _)), _)) as def) :: defs ->
+     begin match atyp with
+     | Parse_ast.ATyp_inc -> symbols := StringSet.add "_DEFAULT_INC" !symbols; def :: preprocess defs
+     | Parse_ast.ATyp_dec -> symbols := StringSet.add "_DEFAULT_DEC" !symbols; def :: preprocess defs
+     | _ -> def :: preprocess defs
+     end
+
   | def :: defs -> def :: preprocess defs
 
 let preprocess_ast (Parse_ast.Defs defs) = Parse_ast.Defs (preprocess defs)