samesign

1 files changed, 5 insertions, 1 deletions

diff --git a/bits.c b/bits.c
index 951cc91..7e0ed68 100644
--- a/bits.c
+++ b/bits.c
@@ -50,7 +50,11 @@ int bitXor(int x, int y) {
  *   1 if x and y have the same sign , 0 otherwise.
  */
 int samesign(int x, int y) {
-    return 2;
+    if (!x)
+      return !y;
+    if (!y)
+      return 0;
+    return !((x ^ y) >> 31);
 }
 
 /*