[bigbillheck]

They switched away from CORDIC at one point: https://www.intel.com/content/www/us/en/developer/articles/t...

(there doesn't seem to actually be a linked article there, just the summary)

[vardump]

Pretty weird Intel's sine computation latency hasn't changed all that much over the years. Latencies have been pretty similar for 20 years.

EDIT: That's a paper for a software library, not the CPU's internal implementation. Which is probably still done with CORDIC.

[bigbillheck]

> EDIT: That's a paper for a software library, not the CPU's internal implementation.

Unless you're seeing something I'm not, it's talking about x87, which hasn't been anything other than 'internal' since they stopped selling the 80486sx.

[vardump]

Ah you're right.

Anyways I wonder why it's still so slow.

60-120 cycles sure looks like a CORDIC implementation, but perhaps not.