By: Nicolas Capens (nicolas.capens.delete@this.gmail.com),
Room: Moderated Discussions
jokerman (jokerman.delete@this.jokerman.jokerman) on August 24, 2014 1:27 pm wrote:
> When Intel upgraded the divider for Penryn, it was used for both FP and Integer.
>
> http://www.tecchannel.de/bild-zoom/471992/4/357738/il-77367887668538663/
>
> Penryn was Radix-16. Does anybody know what improvements where done since then (NHM, SNB, IVB, HSW) ?
> Radix-1024 would improve speed by about 2.5x compared to Radix-16.
Yes, Penryn makes me hopeful that this improvement will also benefit SIMD division (and square root) this time. I'm pretty sure no improvements were made between Penryn and Broadwell, except for Ivy Bridge extending AVX division from 128-bit to 256-bit.
> When Intel upgraded the divider for Penryn, it was used for both FP and Integer.
>
> http://www.tecchannel.de/bild-zoom/471992/4/357738/il-77367887668538663/
>
> Penryn was Radix-16. Does anybody know what improvements where done since then (NHM, SNB, IVB, HSW) ?
> Radix-1024 would improve speed by about 2.5x compared to Radix-16.
Yes, Penryn makes me hopeful that this improvement will also benefit SIMD division (and square root) this time. I'm pretty sure no improvements were made between Penryn and Broadwell, except for Ivy Bridge extending AVX division from 128-bit to 256-bit.
Thread (20 posts)
| Topic | Posted By | Posted |
|---|---|---|
| Broadwell enhancements | Nicolas Capens | |
| Broadwell divider | jokerman | |
| Broadwell divider | Nicolas Capens | |
| Broadwell divider | EduardoS | |
| Broadwell divider | Michael S | |
| Broadwell divider | dmcq | |
| Broadwell divider | Sylvain Collange | |
| Broadwell divider | Michael S | |
| Ivy Bridge divider | Nicolas Capens | |
| Ivy Bridge divider | Eric Bron | |
| Ivy Bridge divider | Nicolas Capens | |
| Ivy Bridge divider | EduardoS | |
| Ivy Bridge divider | Nicolas Capens | |
| Broadwell divider | Eric Bron | |
| Ivy Bridge divider | Nicolas Capens | |
| Ivy Bridge divider | Eric Bron | |
| Ivy Bridge divider | Nicolas Capens | |
| Ivy Bridge divider | Eric Bron | |
| Ivy Bridge divider | Nicolas Capens | |
| Broadwell divider | BLL2 |