3 ms·

Sure but also thanks to a few patents having expired, especially that one about hyper threading[1]. edit: https://patents.google.com/patent/US3728692A/en http

Sure but also thanks to a few patents having expired, especially that one about hyper threading[1]. edit: https://patents.google.com/patent/US3728692A/en https://patents.google.com/patent/US3728692A/en https://patents.google.com/patent/US3771138 https://patents.google.com/patent/US3771138 [1] Should have said simultaneous multithreading (SMT) instead of hyper threading which is specific to Intel.

Moto7451 8y ago
Weren't those patents part of the AMD-Intel cross licensing deal or are there some x86 CPU related patents that are kept separate?
- monocasa 8y ago
  Those are 1971 IBM patents. It would be interesting to know anything more on the AMD/Intel agreements than the vague "x86 cross licensing" though for sure.
  - Moto7451 8y ago
    https://www.zdnet.com/article/intel-and-amd-settle-agree-cross-licensing-deal/ https://www.zdnet.com/article/intel-and-amd-settle-agree-cro... https://www.sec.gov/Archives/edgar/data/2488/000119312509236705/dex102.htm https://www.sec.gov/Archives/edgar/data/2488/000119312509236... The first will be a quicker read than the second ;). The other commenter mentioned SMT was an IBM patent rather than an Intel one, so that's probably the answer to my question. It seems weird that they wouldn't have just licensed that from IBM as well.
    - monocasa 8y ago
      The IBM patents have been expired for decades though. There's nothing to licence. But that SEC link is awesome; I though the agreement was completely confidential and we'd only ever see it in a historical context. Thanks!
- CodeArtisan 8y ago
  Before Ryzen, AMD's CPUs were relying on Cluster-based Multithreading (CMT). you can read more about CMT vs SMT here https://scalibq.wordpress.com/2012/02/14/the-myth-of-cmt-cluster-based-multithreading/ https://scalibq.wordpress.com/2012/02/14/the-myth-of-cmt-clu...

3 ms·

Sure but also thanks to a few patents having expired, especially that one about hyper threading[1]. edit: https://patents.google.com/patent/US3728692A/en http

by CodeArtisan 8y ago

Moto7451 8y ago
Weren't those patents part of the AMD-Intel cross licensing deal or are there some x86 CPU related patents that are kept separate?
- monocasa 8y ago
  Those are 1971 IBM patents. It would be interesting to know anything more on the AMD/Intel agreements than the vague "x86 cross licensing" though for sure.
  - Moto7451 8y ago
    https://www.zdnet.com/article/intel-and-amd-settle-agree-cross-licensing-deal/ https://www.zdnet.com/article/intel-and-amd-settle-agree-cro... https://www.sec.gov/Archives/edgar/data/2488/000119312509236705/dex102.htm https://www.sec.gov/Archives/edgar/data/2488/000119312509236... The first will be a quicker read than the second ;). The other commenter mentioned SMT was an IBM patent rather than an Intel one, so that's probably the answer to my question. It seems weird that they wouldn't have just licensed that from IBM as well.
    - monocasa 8y ago
      The IBM patents have been expired for decades though. There's nothing to licence. But that SEC link is awesome; I though the agreement was completely confidential and we'd only ever see it in a historical context. Thanks!
- CodeArtisan 8y ago
  Before Ryzen, AMD's CPUs were relying on Cluster-based Multithreading (CMT). you can read more about CMT vs SMT here https://scalibq.wordpress.com/2012/02/14/the-myth-of-cmt-cluster-based-multithreading/ https://scalibq.wordpress.com/2012/02/14/the-myth-of-cmt-clu...