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Next: 3.5.7 wNGXhalfwNGZhalf Up: 3.5 Precompiler flagsfile Previous: 3.5.5 REAL_to_DBLE (VASP.3.X only)

3.5.6 NGXhalf, NGZhalf

For charge densities and potentials half the storage can be saved if one of this flags is used because

To use a real to complex FFT you must specify -DNGXhalf for the serial version and -DNGZhalf for the parallel version. If -DNGXhalf is specified for the serial version the real to complex FFT is "simulated" by a complex to complex FFT.

Mind: If this flag is changed in the makefile, recompile all *.F files. This can be done using touch *.F.



MASTER USER VASP
Mon Mar 29 10:38:29 MEST 1999