WriteValuePacked Bug

Description

Hello,I find when use the WriteValuePacked api to pack a float value, it will convert the float to uint.Due to the storage format of the float the convert value will bigger than 1 << 29,which can lead to the result of using 5 bytes to serialize the float,so can you tell me the reason why we convert the float to uint.

Reproduce Steps

Use the test runner to pack the float number.

Actual Outcome

Lead to the result of using 5 bytes to serialize the float.

Expected Outcome

Use less than 4 bytes to serialize the float.

Screenshots

从 WriteValuePacked API 开始，使用 test runner 重现 float 情况。检查 float-to-uint 转换和 packed serialization 的行为；当确定当前字节数的原因，并且有一个可复现的测试验证预期的序列化大小时，即表示完成。