There is necessity to port BlackFin VDSP code to TI AM3358. The later is Cortex A8 core with NEON SIMD coprocessor (???). BlackFin code uses DSP library; namely FFT functions provided with VDSP. The BTDI mark cited for Cortex A8 is about 30% higher then BlackFin at the same clock rate; whatever it means. Still is not clear to if AM3358 could handle the job; so my questions to people familiar with 3358: Is there available DSP library with general purpose FFT functions for AM3358 ? How does AM3358 compare to Blackfin on DSP tasks, such as FIR/IIR, FFT, floating point matrix inversion ? I know that 1024 point 16 bit complex FFT with precomputed twiddle factors and normalization at every stage takes about 18k cycles on Blackfin, all overheads included and no memory stalls. Could you cite performance number for AM3358 on the similar task? Or, any performance numbers for AM3358 for any realistic computational tasks? Vladimir Vassilevsky DSP and Mixed Signal Designs www.abvolt.com
AM3358 DSP benchmark
Started by ●June 15, 2013
Reply by ●June 15, 20132013-06-15
http://www.fftw.org/ See the comment on version >=3.3.1 for ARM Neon. --Randy Vladimir Vassilevsky <nospam@nowhere.com> writes:> There is necessity to port BlackFin VDSP code to TI AM3358. The later > is Cortex A8 core with NEON SIMD coprocessor (???). > BlackFin code uses DSP library; namely FFT functions provided with VDSP. > > The BTDI mark cited for Cortex A8 is about 30% higher then BlackFin at > the same clock rate; whatever it means. Still is not clear to if > AM3358 could handle the job; so my questions to people familiar with > 3358: > > Is there available DSP library with general purpose FFT functions for > AM3358 ? How does AM3358 compare to Blackfin on DSP tasks, such as > FIR/IIR, FFT, floating point matrix inversion ? > > I know that 1024 point 16 bit complex FFT with precomputed twiddle > factors and normalization at every stage takes about 18k cycles on > Blackfin, all overheads included and no memory stalls. > Could you cite performance number for AM3358 on the similar task? > > Or, any performance numbers for AM3358 for any realistic computational > tasks? > > > Vladimir Vassilevsky > DSP and Mixed Signal Designs > www.abvolt.com > > > >-- Randy Yates Digital Signal Labs http://www.digitalsignallabs.com