T=d f ld
V=x
R=-3,3,0.5
F=1*(log(abs(x))=log(2)) + \
  2*(log(abs(x))<log(2)) + \
  4*(log(abs(x))<=log(2)) + \
  8*(log(abs(x))>log(2)) + \
  16*(log(abs(x))>=log(2)) + \
  32*(log(abs(x))!=log(2))
C=1*fp_equal(fp_log(fp_abs(x)),fp_log(2)) + \
  2*fp_less(fp_log(fp_abs(x)),fp_log(2)) + \
  4*fp_lessOrEq(fp_log(fp_abs(x)),fp_log(2)) + \
  8*fp_greater(fp_log(fp_abs(x)),fp_log(2)) + \
  16*fp_greaterOrEq(fp_log(fp_abs(x)),fp_log(2)) + \
  32*fp_nequal(fp_log(fp_abs(x)),fp_log(2))
