Revision: 4339
Author: [email protected]
Date: Mon Apr 5 01:00:28 2010
Log: Parsing some kinds of integers and junk values in
Runtime_NumberToString. For that values the string is converted into int
and then into SMI. It lets to avoid floating point operations.
Committed: http://code.google.com/p/v8/source/detail?r=4331
Review URL: http://codereview.chromium.org/1572004
http://code.google.com/p/v8/source/detail?r=4339
Modified:
/branches/bleeding_edge/src/runtime.cc
=======================================
--- /branches/bleeding_edge/src/runtime.cc Wed Mar 31 10:19:05 2010
+++ /branches/bleeding_edge/src/runtime.cc Mon Apr 5 01:00:28 2010
@@ -4482,7 +4482,9 @@
bool minus = (data[0] == '-');
int start_pos = (minus ? 1 : 0);
- if (start_pos == len || data[start_pos] > '9') {
+ if (start_pos == len) {
+ return Heap::nan_value();
+ } else if (data[start_pos] > '9') {
// Fast check for a junk value. A valid string may start from a
// whitespace, a sign ('+' or '-'), the decimal point, a decimal
digit or
// the 'I' character ('Infinity'). All of that have codes not
greater than
--
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