Hi Ray,
No need for a z15, z390 supports them :-)
Melvyn.
On 14/12/2021 01:06 pm, Ray Mansell wrote:
Excellent stuff, as always, Dan. Now, if only I could find a z15 on
which to play :-)
Ray
On 12/14/2021 12:03 AM, Dan Greiner wrote:
Back in late September, I posted a series of PowerPoint slides
describing the IBM z/Architecture vector facilities on my Google
Drive:
https://drive.google.com/file/d/13OhBkhgbU7N6a20nVo5uEAnR-s3-Pyz8/view?usp=sharing
The most common response I've received is something to the effect of
"good stuff ... now what do I do with it?"
Last Christmas, I received a really annoying puzzle as a gift ...
annoying because solving it involved a lot of repetitive stress on my
already inflamed carpals. A simple C program did the trick, but I
wanted to see if I could use the vector ops to do better, so I
started researching them. This led to a months-long documentation
project resulting in the slides mentioned above.
I've put together another short presentation — only 11 slides — that
describe the puzzle and one solution using vector instructions. There
are numerous features of the vector architecture, but this pitch
illustrates what I think are a few key points: SIMD, branch
avoidance, and a really neat instruction (VPERM). Unlike my previous
stuff, there is no animation in these slides; the meat of it is in
the presenter notes, so make sure you view the notes page.
https://docs.google.com/presentation/d/1gD089nRo8Lch-rkg7T7pbwclBAvsp0bf/edit?usp=sharing&ouid=104012833061983447284&rtpof=true&sd=true
Enjoy!
