From 37224203c1dc7bfb6ffb9ecfcbfaca033f2ba81a Mon Sep 17 00:00:00 2001
From: Wu Mianzhi <10215501411@stu.ecnu.edu.cn>
Date: Fri, 16 Sep 2022 12:57:06 +0800
Subject: [PATCH] fix quiz3

---
 lab2/datalab-handout/bits.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lab2/datalab-handout/bits.c b/lab2/datalab-handout/bits.c
index ad1fc07..c3070bd 100644
--- a/lab2/datalab-handout/bits.c
+++ b/lab2/datalab-handout/bits.c
@@ -176,7 +176,8 @@ int isTmax(int x) {
   int xplusone = x + 1;
   int all1 = xplusone ^ x;
   int allzero = all1 + 1;
-  return !allzero;
+  int notnegative1 = !(x ^ (-1));
+  return !(allzero | notnegative1);
 }
 /* 
  * allOddBits - return 1 if all odd-numbered bits in word set to 1