On Wednesday, 25 January 2012 at 00:49:15 UTC, bearophile wrote:
a:
Because dmd currently doesn't have an intrinsic for the SHUFPS
instruction I've included a version block with some GDC
specific code (this gave me a speedup of up to 80%).
It seems an instruction worth having in dmd too.
Chart: http://cloud.github.com/downloads/jerro/pfft/image.png
I know your code is relatively simple, so it's not meant to be
the fastest on the ground, but in your nice graph _as reference
point_ I'd like to see a line for the FTTW too. Such line is
able to show us how close or how far all this is from an
industry standard performance.
(And if possible I'd like to see two lines for the LDC2
compiler too.)
Bye,
bearophile
I have updated the graph now.
