}

    reserve_spaces[0] = op.input(3);  // pop_mean
    reserve_spaces[1] = op.input(4);  // pop_var
    if (data_format == "NCHW") {
      x = Transpose(scope, x, {0, 2, 3, 1});
      grad_y = Transpose(scope, grad_y, {0, 2, 3, 1});
    } else if (data_format == "NCDHW") {
      x = Transpose(scope, x, {0, 2, 3, 4, 1});
      grad_y = Transpose(scope, grad_y, {0, 2, 3, 4, 1});
    }

// Permutation from the NCHW tensor format to NHWC. This is an inverse
// permutation of `kNchwToNhwcPermutation`.
inline constexpr std::array<int64_t, 4> kNchwToNhwcPermutation = {0, 2, 3, 1};

// Permutation from the OIHW (== (output features, input features, height,
// width)) tensor format to HWIO. This is commonly used to transpose convolution

    // Read a delimiter.
    if (b != addressOffset) {
      if (input[i] != '.') return false // Wrong delimiter.
      i++
    }

    // Read 1 or more decimal digits for a value in 0..255.
    var value = 0
    val groupOffset = i
    while (i < limit) {
      val c = input[i]
      if (c < '0' || c > '9') break

	// YCbCr.RGBA method (16 bit color output).
	//
	// The solution is to make the rounding adjustment non-constant, and equal
	// to 257*Y', which ranges over [0, 1<<16-1] as Y' ranges over [0, 255].
	// YY1 is then defined as:
	//	YY1 = 65536*Y' + 257*Y'
	// or equivalently:
	//	YY1 = Y' * 0x10101
	yy1 := int32(y) * 0x10101
	cb1 := int32(cb) - 128
	cr1 := int32(cr) - 128

00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 32 cc a9  |.............2..|
00000050  cc a8 c0 2b c0 2f c0 2c  c0 30 c0 09 c0 13 c0 0a  |...+./.,.0......|
00000060  c0 14 00 9c 00 9d 00 2f  00 35 c0 12 00 0a c0 23  |......./.5.....#|
00000070  c0 27 00 3c c0 07 c0 11  00 05 13 03 13 01 13 02  |.'.<............|
00000080  01 00 00 7f 00 0b 00 02  01 00 ff 01 00 01 00 00  |................|

00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 32 cc a9  |.............2..|
00000050  cc a8 c0 2b c0 2f c0 2c  c0 30 c0 09 c0 13 c0 0a  |...+./.,.0......|
00000060  c0 14 00 9c 00 9d 00 2f  00 35 c0 12 00 0a c0 23  |......./.5.....#|
00000070  c0 27 00 3c c0 07 c0 11  00 05 13 03 13 01 13 02  |.'.<............|
00000080  01 00 00 7f 00 0b 00 02  01 00 ff 01 00 01 00 00  |................|

00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 32 cc a9  |.............2..|
00000050  cc a8 c0 2b c0 2f c0 2c  c0 30 c0 09 c0 13 c0 0a  |...+./.,.0......|
00000060  c0 14 00 9c 00 9d 00 2f  00 35 c0 12 00 0a c0 23  |......./.5.....#|
00000070  c0 27 00 3c c0 07 c0 11  00 05 13 03 13 01 13 02  |.'.<............|
00000080  01 00 00 7f 00 0b 00 02  01 00 ff 01 00 01 00 00  |................|

00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 32 cc a9  |.............2..|
00000050  cc a8 c0 2b c0 2f c0 2c  c0 30 c0 09 c0 13 c0 0a  |...+./.,.0......|
00000060  c0 14 00 9c 00 9d 00 2f  00 35 c0 12 00 0a c0 23  |......./.5.....#|
00000070  c0 27 00 3c c0 07 c0 11  00 05 13 03 13 01 13 02  |.'.<............|
00000080  01 00 00 7f 00 0b 00 02  01 00 ff 01 00 01 00 00  |................|

00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 32 cc a9  |.............2..|
00000050  cc a8 c0 2b c0 2f c0 2c  c0 30 c0 09 c0 13 c0 0a  |...+./.,.0......|
00000060  c0 14 00 9c 00 9d 00 2f  00 35 c0 12 00 0a c0 23  |......./.5.....#|
00000070  c0 27 00 3c c0 07 c0 11  00 05 13 03 13 01 13 02  |.'.<............|
00000080  01 00 00 7f 00 0b 00 02  01 00 ff 01 00 01 00 00  |................|

00000040  00 00 00 00 00 00 00 00  00 00 00 00 00 32 cc a9  |.............2..|
00000050  cc a8 c0 2b c0 2f c0 2c  c0 30 c0 09 c0 13 c0 0a  |...+./.,.0......|
00000060  c0 14 00 9c 00 9d 00 2f  00 35 c0 12 00 0a c0 23  |......./.5.....#|
00000070  c0 27 00 3c c0 07 c0 11  00 05 13 03 13 01 13 02  |.'.<............|
00000080  01 00 00 7f 00 0b 00 02  01 00 ff 01 00 01 00 00  |................|