Inline a number of simple date computations....

src/date-delay.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 27 matching lines @@
 // Keep reference to original values of some global properties.  This
 // has the added benefit that the code in this file is isolated from
 // changes to these properties.
 const $Date = global.Date;
 
 // Helper function to throw error.
 function ThrowDateTypeError() {
   throw new $TypeError('this is not a Date object.');
 }
 
-// ECMA 262 - 15.9.1.2
-function Day(time) {
-  return FLOOR(time / msPerDay);
-}
-
-
 // ECMA 262 - 5.2
 function Modulo(value, remainder) {
   var mod = value % remainder;
   // Guard against returning -0.
   if (mod == 0) return 0;
   return mod >= 0 ? mod : mod + remainder;
 }
 
 
 function TimeWithinDay(time) {
@@ skipping 15 matching lines @@
       - FLOOR((year-1901)/100)
       + FLOOR((year-1601)/400);
 }
 
 
 function TimeFromYear(year) {
   return msPerDay * DayFromYear(year);
 }
 
 
-function YearFromTime(time) {
-  return FromJulianDay(Day(time) + kDayZeroInJulianDay).year;
-}
-
-
 function InLeapYear(time) {
-  return DaysInYear(YearFromTime(time)) == 366 ? 1 : 0;
-}
-
-
-// ECMA 262 - 15.9.1.4
-function MonthFromTime(time) {
-  return FromJulianDay(Day(time) + kDayZeroInJulianDay).month;
+  return DaysInYear(YEAR_FROM_TIME(time)) == 366 ? 1 : 0;
 }
 
 
 function DayWithinYear(time) {
-  return Day(time) - DayFromYear(YearFromTime(time));
-}
-
-
-// ECMA 262 - 15.9.1.5
-function DateFromTime(time) {
-  return FromJulianDay(Day(time) + kDayZeroInJulianDay).date;
+  return DAY(time) - DayFromYear(YEAR_FROM_TIME(time));
 }
 
 
 // ECMA 262 - 15.9.1.9
 function EquivalentYear(year) {
   // Returns an equivalent year in the range [2008-2035] matching
   // - leap year.
   // - week day of first day.
   var time = TimeFromYear(year);
   var recent_year = (InLeapYear(time) == 0 ? 1967 : 1956) +
       (WeekDay(time) * 12) % 28;
   // Find the year in the range 2008..2037 that is equivalent mod 28.
   // Add 3*28 to give a positive argument to the modulus operator.
   return 2008 + (recent_year + 3*28 - 2008) % 28;
 }
 
 
 function EquivalentTime(t) {
   // The issue here is that some library calls don't work right for dates
   // that cannot be represented using a non-negative signed 32 bit integer
   // (measured in whole seconds based on the 1970 epoch).
   // We solve this by mapping the time to a year with same leap-year-ness
   // and same starting day for the year.  The ECMAscript specification says
   // we must do this, but for compatibility with other browsers, we use
   // the actual year if it is in the range 1970..2037
   if (t >= 0 && t <= 2.1e12) return t;
-  var day = MakeDay(EquivalentYear(YearFromTime(t)), MonthFromTime(t), DateFromTime(t));
+  var day = MakeDay(EquivalentYear(YEAR_FROM_TIME(t)), MONTH_FROM_TIME(t), DATE_FROM_TIME(t));
   return TimeClip(MakeDate(day, TimeWithinDay(t)));
 }
 
 
 // Because computing the DST offset is a pretty expensive operation
 // we keep a cache of last computed offset along with a time interval
 // where we know the cache is valid.
 var DST_offset_cache = {
   // Cached DST offset.
   offset: 0,
@@ skipping 75 matching lines @@
     return timezone_cache_timezone;
   }
   var timezone = %DateLocalTimezone(EquivalentTime(t));
   timezone_cache_time = t;
   timezone_cache_timezone = timezone;
   return timezone;
 }
 
 
 function WeekDay(time) {
-  return Modulo(Day(time) + 4, 7);
+  return Modulo(DAY(time) + 4, 7);
 }
 
 var local_time_offset = %DateLocalTimeOffset();
 
 function LocalTime(time) {
   if (NUMBER_IS_NAN(time)) return time;
   return time + local_time_offset + DaylightSavingsOffset(time);
 }
 
 function LocalTimeNoCheck(time) {
-  return time + local_time_offset + DaylightSavingsOffset(time);
+  // Inline the DST offset cache checks for speed.
+  var cache = DST_offset_cache;
+  if (cache.start <= time && time <= cache.end) {
+    var dst_offset = cache.offset;
+  } else {
+    var dst_offset = DaylightSavingsOffset(time);
+  }
+  return time + local_time_offset + dst_offset;
 }
 
 
 function UTC(time) {
   if (NUMBER_IS_NAN(time)) return time;
   var tmp = time - local_time_offset;
   return tmp - DaylightSavingsOffset(tmp);
 }
 
 
-// ECMA 262 - 15.9.1.10
-function HourFromTime(time) {
-  return Modulo(FLOOR(time / msPerHour), HoursPerDay);
-}
-
-
-function MinFromTime(time) {
-  return Modulo(FLOOR(time / msPerMinute), MinutesPerHour);
-}
-
-
-function SecFromTime(time) {
-  return Modulo(FLOOR(time / msPerSecond), SecondsPerMinute);
-}
-
-
-function msFromTime(time) {
-  return Modulo(time, msPerSecond);
-}
-
-
 // ECMA 262 - 15.9.1.11
 function MakeTime(hour, min, sec, ms) {
   if (!$isFinite(hour)) return $NaN;
   if (!$isFinite(min)) return $NaN;
   if (!$isFinite(sec)) return $NaN;
   if (!$isFinite(ms)) return $NaN;
   return TO_INTEGER(hour) * msPerHour
       + TO_INTEGER(min) * msPerMinute
       + TO_INTEGER(sec) * msPerSecond
       + TO_INTEGER(ms);
@@ skipping 173 matching lines @@
     } else if (IS_STRING(year)) {
       // Probe the Date cache. If we already have a time value for the
       // given time, we re-use that instead of parsing the string again.
       var cache = Date_cache;
       if (cache.string === year) {
         value = cache.time;
       } else {
         value = DateParse(year);
         if (!NUMBER_IS_NAN(value)) {
           cache.time = value;
-          cache.year = YearFromTime(LocalTimeNoCheck(value));
+          cache.year = YEAR_FROM_TIME(LocalTimeNoCheck(value));
           cache.string = year;
         }
       }
 
     } else {
       // According to ECMA 262, no hint should be given for this
       // conversion. However, ToPrimitive defaults to STRING_HINT for
       // Date objects which will lose precision when the Date
       // constructor is called with another Date object as its
       // argument. We therefore use NUMBER_HINT for the conversion,
@@ skipping 19 matching lines @@
   }
   %_SetValueOf(this, value);
 });
 
 
 // Helper functions.
 function GetTimeFrom(aDate) {
   return DATE_VALUE(aDate);
 }
 
-
 function GetMillisecondsFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return msFromTime(LocalTimeNoCheck(t));
+  return MS_FROM_TIME(LocalTimeNoCheck(t));
 }
 
 
 function GetUTCMillisecondsFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return msFromTime(t);
+  return MS_FROM_TIME(t);
 }
 
 
 function GetSecondsFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return SecFromTime(LocalTimeNoCheck(t));
+  return SEC_FROM_TIME(LocalTimeNoCheck(t));
 }
 
 
 function GetUTCSecondsFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return SecFromTime(t);
+  return SEC_FROM_TIME(t);
 }
 
 
 function GetMinutesFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return MinFromTime(LocalTimeNoCheck(t));
+  return MIN_FROM_TIME(LocalTimeNoCheck(t));
 }
 
 
 function GetUTCMinutesFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return MinFromTime(t);
+  return MIN_FROM_TIME(t);
 }
 
 
 function GetHoursFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return HourFromTime(LocalTimeNoCheck(t));
+  return HOUR_FROM_TIME(LocalTimeNoCheck(t));
 }
 
 
 function GetUTCHoursFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return HourFromTime(t);
+  return HOUR_FROM_TIME(t);
 }
 
 
 function GetFullYearFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
   var cache = Date_cache;
   if (cache.time === t) return cache.year;
-  return YearFromTime(LocalTimeNoCheck(t));
+  return YEAR_FROM_TIME(LocalTimeNoCheck(t));
 }
 
 
 function GetUTCFullYearFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return YearFromTime(t);
+  return YEAR_FROM_TIME(t);
 }
 
 
 function GetMonthFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return MonthFromTime(LocalTimeNoCheck(t));
+  return MONTH_FROM_TIME(LocalTimeNoCheck(t));
 }
 
 
 function GetUTCMonthFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return MonthFromTime(t);
+  return MONTH_FROM_TIME(t);
 }
 
 
 function GetDateFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return DateFromTime(LocalTimeNoCheck(t));
+  return DATE_FROM_TIME(LocalTimeNoCheck(t));
 }
 
 
 function GetUTCDateFrom(aDate) {
   var t = DATE_VALUE(aDate);
   if (NUMBER_IS_NAN(t)) return t;
-  return DateFromTime(t);
+  return DATE_FROM_TIME(t);
 }
 
 
 %FunctionSetPrototype($Date, new $Date($NaN));
 
 
 var WeekDays = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
 var Months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
 
 
 function TwoDigitString(value) {
   return value < 10 ? "0" + value : "" + value;
 }
 
 
 function DateString(time) {
-  var YMD = FromJulianDay(Day(time) + kDayZeroInJulianDay);
+  var YMD = FromJulianDay(DAY(time) + kDayZeroInJulianDay);
   return WeekDays[WeekDay(time)] + ' '
       + Months[YMD.month] + ' '
       + TwoDigitString(YMD.date) + ' '
       + YMD.year;
 }
 
 
 var LongWeekDays = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
 var LongMonths = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
 
 
 function LongDateString(time) {
-  var YMD = FromJulianDay(Day(time) + kDayZeroInJulianDay);
+  var YMD = FromJulianDay(DAY(time) + kDayZeroInJulianDay);
   return LongWeekDays[WeekDay(time)] + ', '
       + LongMonths[YMD.month] + ' '
       + TwoDigitString(YMD.date) + ', '
       + YMD.year;
 }
 
 
 function TimeString(time) {
-  return TwoDigitString(HourFromTime(time)) + ':'
-      + TwoDigitString(MinFromTime(time)) + ':'
-      + TwoDigitString(SecFromTime(time));
+  return TwoDigitString(HOUR_FROM_TIME(time)) + ':'
+      + TwoDigitString(MIN_FROM_TIME(time)) + ':'
+      + TwoDigitString(SEC_FROM_TIME(time));
 }
 
 
 function LocalTimezoneString(time) {
   var timezoneOffset =
       (local_time_offset + DaylightSavingsOffset(time)) / msPerMinute;
   var sign = (timezoneOffset >= 0) ? 1 : -1;
   var hours = FLOOR((sign * timezoneOffset)/60);
   var min   = FLOOR((sign * timezoneOffset)%60);
   var gmt = ' GMT' + ((sign == 1) ? '+' : '-') +
@@ skipping 225 matching lines @@
 function DateSetTime(ms) {
   if (!IS_DATE(this)) ThrowDateTypeError();
   return %_SetValueOf(this, TimeClip(ToNumber(ms)));
 }
 
 
 // ECMA 262 - 15.9.5.28
 function DateSetMilliseconds(ms) {
   var t = LocalTime(DATE_VALUE(this));
   ms = ToNumber(ms);
-  var time = MakeTime(HourFromTime(t), MinFromTime(t), SecFromTime(t), ms);
-  return %_SetValueOf(this, TimeClip(UTC(MakeDate(Day(t), time))));
+  var time = MakeTime(HOUR_FROM_TIME(t), MIN_FROM_TIME(t), SEC_FROM_TIME(t), ms);
+  return %_SetValueOf(this, TimeClip(UTC(MakeDate(DAY(t), time))));
 }
 
 
 // ECMA 262 - 15.9.5.29
 function DateSetUTCMilliseconds(ms) {
   var t = DATE_VALUE(this);
   ms = ToNumber(ms);
-  var time = MakeTime(HourFromTime(t), MinFromTime(t), SecFromTime(t), ms);
-  return %_SetValueOf(this, TimeClip(MakeDate(Day(t), time)));
+  var time = MakeTime(HOUR_FROM_TIME(t), MIN_FROM_TIME(t), SEC_FROM_TIME(t), ms);
+  return %_SetValueOf(this, TimeClip(MakeDate(DAY(t), time)));
 }
 
 
 // ECMA 262 - 15.9.5.30
 function DateSetSeconds(sec, ms) {
   var t = LocalTime(DATE_VALUE(this));
   sec = ToNumber(sec);
   ms = %_ArgumentsLength() < 2 ? GetMillisecondsFrom(this) : ToNumber(ms);
-  var time = MakeTime(HourFromTime(t), MinFromTime(t), sec, ms);
-  return %_SetValueOf(this, TimeClip(UTC(MakeDate(Day(t), time))));
+  var time = MakeTime(HOUR_FROM_TIME(t), MIN_FROM_TIME(t), sec, ms);
+  return %_SetValueOf(this, TimeClip(UTC(MakeDate(DAY(t), time))));
 }
 
 
 // ECMA 262 - 15.9.5.31
 function DateSetUTCSeconds(sec, ms) {
   var t = DATE_VALUE(this);
   sec = ToNumber(sec);
   ms = %_ArgumentsLength() < 2 ? GetUTCMillisecondsFrom(this) : ToNumber(ms);
-  var time = MakeTime(HourFromTime(t), MinFromTime(t), sec, ms);
-  return %_SetValueOf(this, TimeClip(MakeDate(Day(t), time)));
+  var time = MakeTime(HOUR_FROM_TIME(t), MIN_FROM_TIME(t), sec, ms);
+  return %_SetValueOf(this, TimeClip(MakeDate(DAY(t), time)));
 }
 
 
 // ECMA 262 - 15.9.5.33
 function DateSetMinutes(min, sec, ms) {
   var t = LocalTime(DATE_VALUE(this));
   min = ToNumber(min);
   var argc = %_ArgumentsLength();
   sec = argc < 2 ? GetSecondsFrom(this) : ToNumber(sec);
   ms = argc < 3 ? GetMillisecondsFrom(this) : ToNumber(ms);
-  var time = MakeTime(HourFromTime(t), min, sec, ms);
-  return %_SetValueOf(this, TimeClip(UTC(MakeDate(Day(t), time))));
+  var time = MakeTime(HOUR_FROM_TIME(t), min, sec, ms);
+  return %_SetValueOf(this, TimeClip(UTC(MakeDate(DAY(t), time))));
 }
 
 
 // ECMA 262 - 15.9.5.34
 function DateSetUTCMinutes(min, sec, ms) {
   var t = DATE_VALUE(this);
   min = ToNumber(min);
   var argc = %_ArgumentsLength();
   sec = argc < 2 ? GetUTCSecondsFrom(this) : ToNumber(sec);
   ms = argc < 3 ? GetUTCMillisecondsFrom(this) : ToNumber(ms);
-  var time = MakeTime(HourFromTime(t), min, sec, ms);
-  return %_SetValueOf(this, TimeClip(MakeDate(Day(t), time)));
+  var time = MakeTime(HOUR_FROM_TIME(t), min, sec, ms);
+  return %_SetValueOf(this, TimeClip(MakeDate(DAY(t), time)));
 }
 
 
 // ECMA 262 - 15.9.5.35
 function DateSetHours(hour, min, sec, ms) {
   var t = LocalTime(DATE_VALUE(this));
   hour = ToNumber(hour);
   var argc = %_ArgumentsLength();
   min = argc < 2 ? GetMinutesFrom(this) : ToNumber(min);
   sec = argc < 3 ? GetSecondsFrom(this) : ToNumber(sec);
   ms = argc < 4 ? GetMillisecondsFrom(this) : ToNumber(ms);
   var time = MakeTime(hour, min, sec, ms);
-  return %_SetValueOf(this, TimeClip(UTC(MakeDate(Day(t), time))));
+  return %_SetValueOf(this, TimeClip(UTC(MakeDate(DAY(t), time))));
 }
 
 
 // ECMA 262 - 15.9.5.34
 function DateSetUTCHours(hour, min, sec, ms) {
   var t = DATE_VALUE(this);
   hour = ToNumber(hour);
   var argc = %_ArgumentsLength();
   min = argc < 2 ? GetUTCMinutesFrom(this) : ToNumber(min);
   sec = argc < 3 ? GetUTCSecondsFrom(this) : ToNumber(sec);
   ms = argc < 4 ? GetUTCMillisecondsFrom(this) : ToNumber(ms);
   var time = MakeTime(hour, min, sec, ms);
-  return %_SetValueOf(this, TimeClip(MakeDate(Day(t), time)));
+  return %_SetValueOf(this, TimeClip(MakeDate(DAY(t), time)));
 }
 
 
 // ECMA 262 - 15.9.5.36
 function DateSetDate(date) {
   var t = LocalTime(DATE_VALUE(this));
   date = ToNumber(date);
-  var day = MakeDay(YearFromTime(t), MonthFromTime(t), date);
+  var day = MakeDay(YEAR_FROM_TIME(t), MONTH_FROM_TIME(t), date);
   return %_SetValueOf(this, TimeClip(UTC(MakeDate(day, TimeWithinDay(t)))));
 }
 
 
 // ECMA 262 - 15.9.5.37
 function DateSetUTCDate(date) {
   var t = DATE_VALUE(this);
   date = ToNumber(date);
-  var day = MakeDay(YearFromTime(t), MonthFromTime(t), date);
+  var day = MakeDay(YEAR_FROM_TIME(t), MONTH_FROM_TIME(t), date);
   return %_SetValueOf(this, TimeClip(MakeDate(day, TimeWithinDay(t))));
 }
 
 
 // ECMA 262 - 15.9.5.38
 function DateSetMonth(month, date) {
   var t = LocalTime(DATE_VALUE(this));
   month = ToNumber(month);
   date = %_ArgumentsLength() < 2 ? GetDateFrom(this) : ToNumber(date);
-  var day = MakeDay(YearFromTime(t), month, date);
+  var day = MakeDay(YEAR_FROM_TIME(t), month, date);
   return %_SetValueOf(this, TimeClip(UTC(MakeDate(day, TimeWithinDay(t)))));
 }
 
 
 // ECMA 262 - 15.9.5.39
 function DateSetUTCMonth(month, date) {
   var t = DATE_VALUE(this);
   month = ToNumber(month);
   date = %_ArgumentsLength() < 2 ? GetUTCDateFrom(this) : ToNumber(date);
-  var day = MakeDay(YearFromTime(t), month, date);
+  var day = MakeDay(YEAR_FROM_TIME(t), month, date);
   return %_SetValueOf(this, TimeClip(MakeDate(day, TimeWithinDay(t))));
 }
 
 
 // ECMA 262 - 15.9.5.40
 function DateSetFullYear(year, month, date) {
   var t = DATE_VALUE(this);
   t = NUMBER_IS_NAN(t) ? 0 : LocalTimeNoCheck(t);
   year = ToNumber(year);
   var argc = %_ArgumentsLength();
-  month = argc < 2 ? MonthFromTime(t) : ToNumber(month);
-  date = argc < 3 ? DateFromTime(t) : ToNumber(date);
+  month = argc < 2 ? MONTH_FROM_TIME(t) : ToNumber(month);
+  date = argc < 3 ? DATE_FROM_TIME(t) : ToNumber(date);
   var day = MakeDay(year, month, date);
   return %_SetValueOf(this, TimeClip(UTC(MakeDate(day, TimeWithinDay(t)))));
 }
 
 
 // ECMA 262 - 15.9.5.41
 function DateSetUTCFullYear(year, month, date) {
   var t = DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) t = 0;
   var argc = %_ArgumentsLength();
   year = ToNumber(year);
-  month = argc < 2 ? MonthFromTime(t) : ToNumber(month);
-  date = argc < 3 ? DateFromTime(t) : ToNumber(date);
+  month = argc < 2 ? MONTH_FROM_TIME(t) : ToNumber(month);
+  date = argc < 3 ? DATE_FROM_TIME(t) : ToNumber(date);
   var day = MakeDay(year, month, date);
   return %_SetValueOf(this, TimeClip(MakeDate(day, TimeWithinDay(t))));
 }
 
 
 // ECMA 262 - 15.9.5.42
 function DateToUTCString() {
   var t = DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) return kInvalidDate;
   // Return UTC string of the form: Sat, 31 Jan 1970 23:00:00 GMT
   return WeekDays[WeekDay(t)] + ', '
-      + TwoDigitString(DateFromTime(t)) + ' '
-      + Months[MonthFromTime(t)] + ' '
-      + YearFromTime(t) + ' '
+      + TwoDigitString(DATE_FROM_TIME(t)) + ' '
+      + Months[MONTH_FROM_TIME(t)] + ' '
+      + YEAR_FROM_TIME(t) + ' '
       + TimeString(t) + ' GMT';
 }
 
 
 // ECMA 262 - B.2.4
 function DateGetYear() {
   var t = DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) return $NaN;
-  return YearFromTime(LocalTimeNoCheck(t)) - 1900;
+  return YEAR_FROM_TIME(LocalTimeNoCheck(t)) - 1900;
 }
 
 
 // ECMA 262 - B.2.5
 function DateSetYear(year) {
   var t = LocalTime(DATE_VALUE(this));
   if (NUMBER_IS_NAN(t)) t = 0;
   year = ToNumber(year);
   if (NUMBER_IS_NAN(year)) return %_SetValueOf(this, $NaN);
   year = (0 <= TO_INTEGER(year) && TO_INTEGER(year) <= 99)
       ? 1900 + TO_INTEGER(year) : year;
-  var day = MakeDay(year, MonthFromTime(t), DateFromTime(t));
+  var day = MakeDay(year, MONTH_FROM_TIME(t), DATE_FROM_TIME(t));
   return %_SetValueOf(this, TimeClip(UTC(MakeDate(day, TimeWithinDay(t)))));
 }
 
 
 // ECMA 262 - B.2.6
 //
 // Notice that this does not follow ECMA 262 completely.  ECMA 262
 // says that toGMTString should be the same Function object as
 // toUTCString.  JSC does not do this, so for compatibility we do not
 // do that either.  Instead, we create a new function whose name
@@ skipping 81 matching lines @@
     "toGMTString", DateToGMTString,
     "toUTCString", DateToUTCString,
     "getYear", DateGetYear,
     "setYear", DateSetYear,
     "toISOString", DateToISOString,
     "toJSON", DateToJSON
   ));
 }
 
 SetupDate();