Invert

Inverti (capovolgi) ogni bit dei tipi supportati; ad esempio, digita "uint8" il valore 01010101 diventa 10101010.

Capovolgi ogni bit dei tipi supportati. Ad esempio, digita "int8" (decimale 2) binario 00000010 diventa (decimale -3) binario 11111101. Questa operazione viene eseguita su ciascun elemento dell'argomento tensore "x".

Esempio:

import tensorflow as tf
 from tensorflow.python.ops import bitwise_ops
 
 # flip 2 (00000010) to -3 (11111101)
 tf.assert_equal(-3, bitwise_ops.invert(2))
 
 dtype_list = [dtypes.int8, dtypes.int16, dtypes.int32, dtypes.int64,
               dtypes.uint8, dtypes.uint16, dtypes.uint32, dtypes.uint64]
 
 inputs = [0, 5, 3, 14]
 for dtype in dtype_list:
   # Because of issues with negative numbers, let's test this indirectly.
   # 1. invert(a) and a = 0
   # 2. invert(a) or a = invert(0)
   input_tensor = tf.constant([0, 5, 3, 14], dtype=dtype)
   not_a_and_a, not_a_or_a, not_0 = [bitwise_ops.bitwise_and(
                                       input_tensor, bitwise_ops.invert(input_tensor)),
                                     bitwise_ops.bitwise_or(
                                       input_tensor, bitwise_ops.invert(input_tensor)),
                                     bitwise_ops.invert(
                                       tf.constant(0, dtype=dtype))]
 
   expected = tf.constant([0, 0, 0, 0], dtype=tf.float32)
   tf.assert_equal(tf.cast(not_a_and_a, tf.float32), expected)
 
   expected = tf.cast([not_0] * 4, tf.float32)
   tf.assert_equal(tf.cast(not_a_or_a, tf.float32), expected)
 
   # For unsigned dtypes let's also check the result directly.
   if dtype.is_unsigned:
     inverted = bitwise_ops.invert(input_tensor)
     expected = tf.constant([dtype.max - x for x in inputs], dtype=tf.float32)
     tf.assert_equal(tf.cast(inverted, tf.float32), tf.cast(expected, tf.float32))