Hi,
I am working on porting FFT functionality from CMSIS DSP library to another architecture.Unfortunate I faced with problem that arm_bitreversal_32 function is implemented in assembler.
Does any body tried to convert it to C code?
If you'd like other strange ways of doing this plus a number of other hacks in C try
Bit Twiddling Hacks
I feel a bit like I'm a drug peddler pushing that!