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F28377s的几个概念



各位专家好:

         最近调用F28377s库的fft,发现几个概念,有点不清楚,请各位专家帮忙解答一下

IEEE 754 Single-Precision Floating-Point Unit (FPU)

Viterbi/Complex Math Unit (VCU-II)

FFT基于FPU和VCU差别在哪里?
Trigonometric Math Unit (TMU)又是什么作用?

FPU VCU TMU