From ced972ca4f45eec4db90b7f8f7a5ce00802d5863 Mon Sep 17 00:00:00 2001
From: Jesse Alama <jesse@igalia.com>
Date: Wed, 31 Jul 2024 14:01:28 +0200
Subject: [PATCH] `toFixed`: Permit a rounding mode option

---
 spec.emu | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/spec.emu b/spec.emu
index 2e46e5b5..efd4e943 100644
--- a/spec.emu
+++ b/spec.emu
@@ -1130,12 +1130,17 @@ location: https://github.com/tc39/proposal-decimal/
       1. Let _O_ be the *this* value.
       1. Perform ? RequireInternalSlot(_O_, [[Decimal128Data]]).
       1. Let _numDigits_ be *+0*<sub>𝔽</sub>.
+      1. Let _roundingMode_ be *undefined*.
       1. If _options_ is not *undefined*, then
         1. If _options_ is not an Object, throw a *TypeError* exception.
         1. Set _numDigits_ to ? Get(_options_, *"digits"*).
         1. If _numDigits_ is not a Number, throw a *TypeError* exception.
+        1. Set _roundingMode_ to ? Get(_options_, *"roundingMode"*).
       1. If _numDigits_ < 0, throw a *RangeError* exception.
       1. If _numDigits_ is not an integer, throw a *RangeError* exception.
+      1. If _roundingMode_ is *undefined*, set _roundingMode_ to *"halfEven"*.
+      1. Else if _roundingMode_ is not a String, throw a *TypeError* exception.
+      1. Else if _roundingMode_ is not a <emu-xref href="#dfn-decimal128-rounding-mode">Decimal128 rounding mode</emu-xref>, throw a *RangeError* exception.
       1. Let _s_ be Decimal128ToDecimalString(_O_, *false*).
       1. If _s_ is *"NaN"*, *"Infinity"*, or *"-Infinity"*, return _s_.
       1. Let _integerDigits_ be *""*.