precision complex, the former is a single precision complex. Not a big deal,
since we use only complex 0 or 1 or i for which there is no loss of precision.
Note however that CMPLX(a,0.d0) with "a" double precision real, or CMPLX(a,b)
are single-precision complex, and this can introduce loss of precision.
git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@13314 c92efa57-630b-4861-b058-cf58834340f0
to compute many FFTs at the same time, particularly usefull for EXX
but could be usefule for many linear response code as well
(for the time being implemented only for DFTI and internal FFTW,
should be trivial to extend other drivers)
- more clean-ups
git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@12815 c92efa57-630b-4861-b058-cf58834340f0
giannozz