I see. Yet, this particular entry only contains tiny amounts of well known information. I feel like this product line has been well covered for months now.
The key to understanding the popularity of stories that contain "well known information" is that not everyone has the same life experiences. For every piece of info you know, there are a lot of people who have never heard of it. Including on HN.
Was it really "well known" that the complex number multiplication opcodes needed the destination to differ from the source or that the intermediate results were rounded to ensure they were commutative?