message: Document pooling operators in XNNPACK delegate
  Document support and limitations for AVERAGE_POOL_2D and MAX_POOL_2D
diff: @@ -62,6 +62,15 @@ Below is the list of current operators and limitations:
  * Dynamically allocated (with `kTfLiteDynamic` allocation type) inputs and
  output are not supported.
  +### `AVERAGE_POOL_2D`
  +
  +* Inputs and outputs must be in 32-bit floating-point format.
  +* 1x1 pooling is not supported.
  +* Fused `NONE`, `RELU`, `RELU_N1_TO_1`, and `RELU6` activations are supported,
  + but fused `TANH` and `SIGN_BIT` activations are not.
  +* Dynamically allocated (with `kTfLiteDynamic` allocation type) inputs and
  + output are not supported.
  +
  ### `CONV_2D`
  * Inputs and outputs must be in 32-bit floating-point format.
  @@ -94,6 +103,15 @@ Below is the list of current operators and limitations:
  * Dynamically allocated (with `kTfLiteDynamic` allocation type) inputs and
  output are not supported.
  +### `MAX_POOL_2D`
  +
  +* Inputs and outputs must be in 32-bit floating-point format.
  +* 1x1 pooling is not supported.
  +* Fused `NONE`, `RELU`, `RELU_N1_TO_1`, and `RELU6` activations are supported,
  + but fused `TANH` and `SIGN_BIT` activations are not.
  +* Dynamically allocated (with `kTfLiteDynamic` allocation type) inputs and
  + output are not supported.
  +
  ### `MUL`
  * Inputs and outputs must be in 32-bit floating-point format.
  