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LibJS: Add spec comments to Value::to_bigint_int64()
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@ -826,7 +826,11 @@ static Optional<BigInt*> string_to_bigint(VM& vm, StringView string)
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// 7.1.15 ToBigInt64 ( argument ), https://tc39.es/ecma262/#sec-tobigint64
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ThrowCompletionOr<i64> Value::to_bigint_int64(VM& vm) const
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{
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// 1. Let n be ? ToBigInt(argument).
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auto* bigint = TRY(to_bigint(vm));
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// 2. Let int64bit be ℝ(n) modulo 2^64.
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// 3. If int64bit ≥ 2^63, return ℤ(int64bit - 2^64); otherwise return ℤ(int64bit).
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return static_cast<i64>(bigint->big_integer().to_u64());
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}
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