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TMS320C6748: What's the difference between DSPF_sp_fftSPXSP( ) and DSPF_sp_cfftr2_dit( )?

Part Number: TMS320C6748

What's the difference between DSPF_sp_fftSPXSP( ) and DSPF_sp_cfftr2_dit( )?

Where can I find the document on them?

I can only find http://processors.wiki.ti.com/index.php/C674x_DSPLIB

but there is no DSPF_sp_cfftr2_dit( ) here.

I debuged and find that the output of DSPF_sp_cfftr2_dit( ) is bit_reversed, but the DSPF_sp_cfftr2_dit.h file didn't tell me that, where it is documented?