From: ager@chromium.org <ager@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Wed, 28 Oct 2009 10:19:56 +0000 (+0000)
Subject: Add fast check for NaN in NumberCompare slow case.
X-Git-Tag: upstream/4.7.83~23060
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aea684ede47369988a95cb52169753fc305e9f11;p=platform%2Fupstream%2Fv8.git

Add fast check for NaN in NumberCompare slow case.
Review URL: http://codereview.chromium.org/344010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3158 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---

diff --git a/src/runtime.js b/src/runtime.js
index 789bfdb77..ba19871f1 100644
--- a/src/runtime.js
+++ b/src/runtime.js
@@ -128,7 +128,10 @@ function COMPARE(x, ncr) {
   if (IS_STRING(a) && IS_STRING(b)) {
     return %StringCompare(a, b);
   } else {
-    return %NumberCompare(%ToNumber(a), %ToNumber(b), ncr);
+    var a_number = %ToNumber(a);
+    var b_number = %ToNumber(b);
+    if (NUMBER_IS_NAN(a_number) || NUMBER_IS_NAN(b_number)) return ncr;
+    return %NumberCompare(a_number, b_number, ncr);
   }
 }