From 0fb6394654d6e3e0c3abce3a6b5b8809aac4ee4c Mon Sep 17 00:00:00 2001
From: Moss Prescott <moss@theprescotts.com>
Date: Tue, 23 Apr 2024 08:53:32 -0400
Subject: [PATCH] Simplify untagRib

Removing a misleading comment.

This is the one we probably want to inline somehow.
---
 alt/scheme/Obj.jack | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/alt/scheme/Obj.jack b/alt/scheme/Obj.jack
index ec9b52a..6b8062b 100644
--- a/alt/scheme/Obj.jack
+++ b/alt/scheme/Obj.jack
@@ -31,11 +31,8 @@ class Obj {
     /* Convert to a raw pointer. */
     function Rib untagRib(Obj obj) {
         // TODO: (optionally) check the tag bit
-        var int raw;
 
-        // Note: first negate to avoid overflow
-        let raw = -obj;
-        return raw + raw + raw;
+        return -(obj + obj + obj);
     }
 
     /* Strip off the sig bit. */