New upstream version of cycle.h taken from FFTW. (!504) · Merge requests · SWIFT / SWIFTsim

Matthieu Schaller requested to merge new_cycle_h into master Feb 16, 2018

@james' test motivated the quest for a newer version of the cycle counters. It looks like recent ARM chips are now supported.

Even if it does not solve @james' problem it is good to keep up-to-date (2014 in this case...)

New upstream version of cycle.h taken from FFTW.