Remember the priority dates of Pentium 4 SSE2 patents released in Nov 2000 are probably around 1999 at the latest for example. SSE1 itself is just a subset of S

Remember the priority dates of Pentium 4 SSE2 patents released in Nov 2000 are probably around 1999 at the latest for example. SSE1 itself is just a subset of SSE2 with only single precision floating point instructions BTW. That itself was released with Pentium III in Jan 1999, meaning the priority date can't be later than 1998.