Polyfill: Update reference code to reflect normative change

Author: ptomato

polyfill/lib/ecmascript.mjs

@@ -3636,6 +3636,10 @@ export function GetDifferenceSettings(op, options, group, disallowed, fallbackSm
   ]);
 
   let largestUnit = GetTemporalUnitValuedOption(options, 'largestUnit');
+  const roundingIncrement = GetRoundingIncrementOption(options);
+  let roundingMode = GetRoundingModeOption(options, 'trunc');
+  let smallestUnit = GetTemporalUnitValuedOption(options, 'smallestUnit');
+
   ValidateTemporalUnitValue(largestUnit, group, ['auto']);
   if (!largestUnit) largestUnit = 'auto';
   if (Call(ArrayPrototypeIncludes, disallowed, [largestUnit])) {
@@ -3644,12 +3648,8 @@ export function GetDifferenceSettings(op, options, group, disallowed, fallbackSm
     );
   }
 
-  const roundingIncrement = GetRoundingIncrementOption(options);
-
-  let roundingMode = GetRoundingModeOption(options, 'trunc');
   if (op === 'since') roundingMode = NegateRoundingMode(roundingMode);
 
-  let smallestUnit = GetTemporalUnitValuedOption(options, 'smallestUnit');
   ValidateTemporalUnitValue(smallestUnit, group);
   if (!smallestUnit) smallestUnit = fallbackSmallest;
   if (Call(ArrayPrototypeIncludes, disallowed, [smallestUnit])) {

polyfill/lib/instant.mjs

@@ -109,9 +109,9 @@ export class Instant {
     const digits = ES.GetTemporalFractionalSecondDigitsOption(resolvedOptions);
     const roundingMode = ES.GetRoundingModeOption(resolvedOptions, 'trunc');
     const smallestUnit = ES.GetTemporalUnitValuedOption(resolvedOptions, 'smallestUnit');
+    let timeZone = resolvedOptions.timeZone;
     ES.ValidateTemporalUnitValue(smallestUnit, 'time');
     if (smallestUnit === 'hour') throw new RangeErrorCtor('smallestUnit must be a time unit other than "hour"');
-    let timeZone = resolvedOptions.timeZone;
     if (timeZone !== undefined) timeZone = ES.ToTemporalTimeZoneIdentifier(timeZone);
     const { precision, unit, increment } = ES.ToSecondsStringPrecisionRecord(smallestUnit, digits);
     const ns = GetSlot(this, EPOCHNANOSECONDS);

polyfill/lib/zoneddatetime.mjs

@@ -349,9 +349,9 @@ export class ZonedDateTime {
     const showOffset = ES.GetTemporalShowOffsetOption(resolvedOptions);
     const roundingMode = ES.GetRoundingModeOption(resolvedOptions, 'trunc');
     const smallestUnit = ES.GetTemporalUnitValuedOption(resolvedOptions, 'smallestUnit');
+    const showTimeZone = ES.GetTemporalShowTimeZoneNameOption(resolvedOptions);
     ES.ValidateTemporalUnitValue(smallestUnit, 'time');
     if (smallestUnit === 'hour') throw new RangeErrorCtor('smallestUnit must be a time unit other than "hour"');
-    const showTimeZone = ES.GetTemporalShowTimeZoneNameOption(resolvedOptions);
     const { precision, unit, increment } = ES.ToSecondsStringPrecisionRecord(smallestUnit, digits);
     return ES.TemporalZonedDateTimeToString(this, precision, showCalendar, showTimeZone, showOffset, {
       unit,