message: [pdsl_core] Remove byte_utils::sign_extend_to
  No longer needed due to the latest byte_util refactorings surrounding bytes_{add,sub}_bytes.
diff: @@ -33,30 +33,6 @@ pub fn negate_bytes(bytes: &mut [u8]) {
  bytes_add_bytes(bytes, &[0x01]);
  }
  -/// Sign-extend `src` to `dst`.
  -///
  -/// This interprets the `src` and `dst` byte slices as
  -/// big-endian twos-complement numbers.
  -///
  -/// # Note
  -///
  -/// This will copy the most-significant bit (sign bit)
  -/// of `src` into `dst`.
  -///
  -/// # Panics
  -///
  -/// If `src` length is not smaller than `dst` length.
  -pub fn sign_extend_to(dst: &mut [u8], src: &[u8]) {
  - let dst_len = dst.len();
  - let src_len = src.len();
  - assert!(src_len < dst_len);
  - let (dst_head, dst_src) = dst.split_at_mut(dst_len - src_len);
  - dst_src.copy_from_slice(src);
  - let sign_bit = (src[0] & 0b1000_0000) != 0;
  - let extend_byte = if sign_bit { 0xFF } else { 0x00 };
  - for byte in dst_head { *byte = extend_byte; }
  -}
  -
  macro_rules! impl_slice_as_array {
  ( $name:ident, $n:expr ) => {
  /// Interprets the slice as exact size array if possible.
  @@ -432,23 +408,4 @@ mod tests {
  ]
  );
  }
  -
  - #[test]
  - fn test_sign_extend_to() {
  - let mut dst = [0x0; 4];
  - let src1 = [0b1000_0000]; // 0x80
  - let src2 = [0b0111_1111]; // 0x7F
  - sign_extend_to(&mut dst, &src1);
  - assert_eq!(dst, [0xFF, 0xFF, 0xFF, 0x80]);
  - sign_extend_to(&mut dst, &src2);
  - assert_eq!(dst, [0x00, 0x00, 0x00, 0x7F]);
  - }
  -
  - #[test]
  - #[should_panic]
  - fn test_sign_extend_to_panic() {
  - let mut dst = [0x0; 4];
  - let src = [0x42; 4];
  - sign_extend_to(&mut dst, &src);
  - }
  }
  