def func():
xi[0] = -yi[None]
xi[1] = ~yi[None]
xi[2] = ti.logical_not(yi[None])
xi[3] = ti.abs(yi[None])
xf[0] = -yf[None]
xf[1] = ti.abs(yf[None])
xf[2] = ti.sqrt(yf[None])
xf[3] = ti.sin(yf[None])
xf[4] = ti.cos(yf[None])
xf[5] = ti.tan(yf[None])
xf[6] = ti.asin(yf[None])
xf[7] = ti.acos(yf[None])
xf[8] = ti.tanh(yf[None])
xf[9] = ti.floor(yf[None])
xf[10] = ti.ceil(yf[None])
xf[11] = ti.exp(yf[None])
xf[12] = ti.log(yf[None])
xf[13] = ti.rsqrt(yf[None])
def norm_inv(self, l=2, eps=0):
import taichi as ti
assert l == 2
return ti.rsqrt(self.norm_sqr() + eps)
