InvertBackward

Autograd node for element-wise bitwise NOT: $y = \mathtt{\sim}x$.

Defined only for integer dtypes (including Bool); floating-point inputs are rejected upstream by AmpPolicy::KeepInput. Bitwise operations have no meaningful gradient — kHasGradient = false.

Math

$y_i = \mathtt{\sim} x_i$

For Bool inputs this is logical negation; for unsigned integers it produces the bitwise complement modulo $2^{\text{bits}}$.