T=d f ld
V=x
R=-1,1,0.25
F=(sin(x) > 0) + \
  2*(0 < sin(x)) + \
  4*(sin(x) < 0) + \
  8*(0 > sin(x))
C=fp_greater(fp_sin(x), 0) + \
  2*fp_less(0, fp_sin(x)) + \
  4*fp_less(fp_sin(x), 0) + \
  8*fp_greater(0, fp_sin(x))
