FloorBackward

Autograd node for element-wise floor: $y = \lfloor x \rfloor$.

Piecewise-constant; derivative is zero almost everywhere and undefined at integer boundaries. kHasGradient = false; the backward node is registered for schema completeness only.

Math

$y_i = \lfloor x_i \rfloor$ (largest integer not greater than $x_i$).