1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/write_uint63.ml b/kernel/write_uint63.ml
new file mode 100644
index 0000000000..0fcaf4f10a
--- /dev/null
+++ b/kernel/write_uint63.ml
@@ -0,0 +1,30 @@
+(** Equivalent of rm -f *)
+
+let safe_remove f =
+  try Unix.chmod f 0o644; Sys.remove f with _ -> ()
+
+(** * Generate an implementation of 63-bit arithmetic *)
+
+let ml_file_copy input output =
+  safe_remove output;
+  let i = open_in input in
+  let o = open_out output in
+  let pr s = Printf.fprintf o s in
+  pr "(* DO NOT EDIT THIS FILE: automatically generated by ./write_uint63.ml *)\n";
+  pr "(* see uint63_amd64.ml and uint63_x86.ml *)\n";
+  try
+    while true do
+      output_string o (input_line i); output_char o '\n'
+    done
+  with End_of_file ->
+    close_in i;
+    close_out o;
+    Unix.chmod output 0o444
+
+let write_uint63 () =
+  ml_file_copy
+    (if max_int = 1073741823 (* 32-bits *) then "uint63_x86.ml"
+     else (* 64 bits *) "uint63_amd64.ml")
+    "uint63.ml"
+
+let () = write_uint63 ()