FFT can be integrated to achieve the VHDL has been tested

synth_fft
.........\and_gates.vhd
.........\baseindex.vhd
.........\but.vhd
.........\butter_lib.vhd
.........\comm.txt
.........\control2.vhd
.........\controller.vhd
.........\counter.vhd
.........\cycles_but.vhd
.........\dff.vhd
.........\divide.vhd
.........\FLOAT2.PIF
.........\FLOAT_RE.TXT
.........\IEEE_TO_.PIF
.........\ioadd.vhd
.........\iod_staged.vhd
.........\lblock.vhd
.........\mult.vhd
.........\multiply.vhd
.........\mux_add.vhd
.........\mux_but.vhd
.........\negate.vhd
.........\normalize.vhd
.........\out_result.vhd
.........\print.vhd
.........\ram.vhd
.........\ram_shift.vhd
.........\rblock.vhd
.........\result.txt
.........\rom.vhd
.........\romadd_gen.vhd
.........\rom_ram.vhd
.........\shift2.vhd
.........\simili.lst
.........\stage.vhd
.........\subtractor.vhd
.........\summer.vhd
.........\swap.vhd
.........\synth_main.vhd
.........\synth_test.vhd
.........\xfft16ngo
.........\.........\COSS16.ngo
.........\.........\fftwrap.vhd
.........\.........\MULXX.ngo
.........\.........\MUX21W16.ngo
.........\.........\MUX2W4.ngo
.........\.........\MUX4W16.ngo
.........\.........\RADD16.ngo
.........\.........\RAMD1616.ngo
.........\.........\README1ST.txt
.........\.........\README_fft16-ngo.doc
.........\.........\REG16.ngo
.........\.........\REG4.ngo
.........\.........\RESULT.ngo
.........\.........\RSUB16.ngo
.........\.........\SINN16.ngo
.........\.........\TCOMPW16.ngo
.........\.........\TRIGINV.ngo
.........\.........\xfft16.ngo
.........\.........\Z6W16.ngo
.........\xfft16_behavle
.........\..............\do
.........\..............\..\compile_all.do
.........\..............\..\compile_tb_fio.do
.........\..............\..\comp_sim_run_fio.do
.........\..............\fft16xk.dat
.........\..............\modelsim.ini
.........\..............\r4difv1.exe
.........\..............\readme_beh_VHDL.doc
.........\..............\tb_xfft16_fio.vhd
.........\..............\vhdl
.........\..............\....\bflywj.vhd
.........\..............\....\bitrev_agen.vhd
.........\..............\....\bitrev_dbufr.vhd
.........\..............\....\blyw0.vhd
.........\..............\....\cb2re.vhd
.........\..............\....\cb8re.vhd
.........\..............\....\cmplxadd.vhd
.........\..............\....\cmplxsub16.vhd
.........\..............\....\cmplx_mul16.vhd
.........\..............\....\coss16.vhd
.........\..............\....\dblbufr.vhd
.........\..............\....\dblbufr1.vhd
.........\..............\....\dfly_agen.vhd
.........\..............\....\dual_xlatch16.vhd
.........\..............\....\fd.vhd
.........\..............\....\fdc.vhd
.........\..............\....\fdre.vhd
.........\..............\....\fdre_locx.vhd
.........\..............\....\fdre_locy.vhd
.........\..............\....\fft16.vhd
.........\..............\....\fft256r4.vhd
.........\..............\....\fft4.vhd
.........\..............\....\fft4r.vhd
.........\..............\....\ftrse.vhd
.........\..............\....\mathpack.vhd
.........\..............\....\mulxx.vhd
.........\..............\....\mux21w16.vhd
.........\..............\....\mux2w4.vhd

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