CCS/TMS320C6748: how to realize fixed-point fft

Part Number:TMS320C6748

Tool/software: Code Composer Studio

Dear:

I'd like to use fixed-point fft with c6748. But there is only float-point fft in dsplib (such as DSPF_sp_fftSPxSP).

Someone has said that the function of  fixed-point fft for c64x (DSP_fft16x16r) is not suit for c6748.

Is there any fixed-point fft lib for c6748 to solve the problem?

Thanks