用verilog撰寫取對數log電路

kevin

欲求A=Log(X),X為整數.A為fixed point.
X 先normalized to 0.5~1的範圍.即X = a x 2^n (a = 0.5~1)
  B0 w5 j6 O/ l$ E- L) z8 j; I再令a=1-h
! M& m3 b9 c% K7 ^4 }則A=Log(X)=n*Log(2)+Log(a)
          =n*Log(2)-(h+h^2/2+h^3/3+h^4/4+ ....)------->>此為泰勒級數展開.
8 _" _2 b4 H  _. B4 w3 R; l% P可參考一下verilog code.