# tf.raw_ops.LSTMBlockCell

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Computes the LSTM cell forward propagation for 1 time step.

#### View aliases


**Compat aliases for migration**

See
[Migration guide](https://www.tensorflow.org/guide/migrate) for
more details.

[`tf.compat.v1.raw_ops.LSTMBlockCell`](https://www.tensorflow.org/api_docs/python/tf/raw_ops/LSTMBlockCell)

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    tf.raw_ops.LSTMBlockCell(
        x,
        cs_prev,
        h_prev,
        w,
        wci,
        wcf,
        wco,
        b,
        forget_bias=1,
        cell_clip=3,
        use_peephole=False,
        name=None
    )

This implementation uses 1 weight matrix and 1 bias vector, and there's an
optional peephole connection.

This kernel op implements the following mathematical equations:

    xh = [x, h_prev]
    [i, f, ci, o] = xh * w + b
    f = f + forget_bias

    if not use_peephole:
      wci = wcf = wco = 0

    i = sigmoid(cs_prev * wci + i)
    f = sigmoid(cs_prev * wcf + f)
    ci = tanh(ci)

    cs = ci .* i + cs_prev .* f
    cs = clip(cs, cell_clip)

    o = sigmoid(cs * wco + o)
    co = tanh(cs)
    h = co .* o

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| ## Args ||
|---|---|
| `x` | A `Tensor`. Must be one of the following types: `half`, `float32`. The input to the LSTM cell, shape (batch_size, num_inputs). |
| `cs_prev` | A `Tensor`. Must have the same type as `x`. Value of the cell state at previous time step. |
| `h_prev` | A `Tensor`. Must have the same type as `x`. Output of the previous cell at previous time step. |
| `w` | A `Tensor`. Must have the same type as `x`. The weight matrix. |
| `wci` | A `Tensor`. Must have the same type as `x`. The weight matrix for input gate peephole connection. |
| `wcf` | A `Tensor`. Must have the same type as `x`. The weight matrix for forget gate peephole connection. |
| `wco` | A `Tensor`. Must have the same type as `x`. The weight matrix for output gate peephole connection. |
| `b` | A `Tensor`. Must have the same type as `x`. The bias vector. |
| `forget_bias` | An optional `float`. Defaults to `1`. The forget gate bias. |
| `cell_clip` | An optional `float`. Defaults to `3`. Value to clip the 'cs' value to. |
| `use_peephole` | An optional `bool`. Defaults to `False`. Whether to use peephole weights. |
| `name` | A name for the operation (optional). |

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| ## Returns ||
|---|---|
| A tuple of `Tensor` objects (i, cs, f, o, ci, co, h). ||
| `i` | A `Tensor`. Has the same type as `x`. |
| `cs` | A `Tensor`. Has the same type as `x`. |
| `f` | A `Tensor`. Has the same type as `x`. |
| `o` | A `Tensor`. Has the same type as `x`. |
| `ci` | A `Tensor`. Has the same type as `x`. |
| `co` | A `Tensor`. Has the same type as `x`. |
| `h` | A `Tensor`. Has the same type as `x`. |

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