On Saturday, 4 November 2017 at 08:19:17 UTC, Walter Bright wrote:
On 11/3/2017 1:20 PM, Dmitry Olshansky wrote:
Sadly array ops would be insufficient for said problem. It wasn’t a direct element wise expression.

That sounds like that might be why it failed vectorization :-)

As I recall it there were no trivial loops there. Usually these 2 magicians could make compiler eat it in a few hours of shuffling the code. They vectorized about half a dozen loops that way.

The last one took 10 times more then the others taken together ;)

If you recall the expression, it would be interesting to see it.

Even if I had it saved somewhere the place was NDA-ed to death. I traded 3 months of intellectual work (and property) for a modest amount of money. Interesting experience but no illusions about R&D centers anymore.

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