warp.untile
===========

.. function:: warp._src.lang.untile(a: Tile[Any,tuple[int, ...]]) -> Any

   .. hlist::
      :columns: 8

      * Kernel
      * Differentiable

   Convert a tile back to per-thread values.
   
   This function converts a block-wide tile back to per-thread values.
   
   * If the input tile is 1D, then the resulting value will be a per-thread scalar
   * If the input tile is 2D, then the resulting value will be a per-thread vector of length M
   
   :param a: A tile with dimensions ``shape=(M, block_dim)``
   
   :returns: A single value per-thread with the same data type as the tile.
   
   .. rubric:: Example
   
   This example shows how to create a linear sequence from thread variables:
   
   .. code-block:: python
   
       @wp.kernel
       def compute():
           i = wp.tid()
   
           # create block-wide tile
           t = wp.tile(i)*2
   
           # convert back to per-thread values
           s = wp.untile(t)
   
           print(s)
   
       wp.launch(compute, dim=16, inputs=[], block_dim=16)
   
   .. code-block:: text
   
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