ttnn.softplus_bw

ttnn.softplus_bw(grad_tensor: ttnn.Tensor, input_tensor: ttnn.Tensor, *, beta: float | None = 1, threshold: float | None = 20, memory_config: ttnn.MemoryConfig | None = None) → List of ttnn.Tensor

Performs backward operations for softplus on input_tensor, beta, threshold with given grad_tensor.

Parameters:

• grad_tensor (ttnn.Tensor) – the input gradient tensor.

• input_tensor (ttnn.Tensor) – the input tensor.

Keyword Arguments:

• beta (float, optional) – Beta value for the Softplus formula . Defaults to 1.

• threshold (float, optional) – Threshold value. Defaults to 20.

• memory_config (ttnn.MemoryConfig, optional) – memory configuration for the operation. Defaults to None.

Returns:

List of ttnn.Tensor – the output tensor.

Note

Supported dtypes, layouts, and ranks:

Dtypes	Layouts	Ranks
BFLOAT16	TILE	2, 3, 4

For more details about BFLOAT8_B, refer to the BFLOAT8_B limitations.

Example

>>> grad_tensor = ttnn.from_torch(torch.tensor([[1, 2], [3, 4]], dtype=torch.bfloat16), layout=ttnn.TILE_LAYOUT, device=device)
>>> input = ttnn.from_torch(torch.tensor([[1, 2], [3, 4]], dtype=torch.bfloat16, requires_grad=True), layout=ttnn.TILE_LAYOUT, device=device)
>>> output = ttnn.softplus_bw(grad_tensor, input, beta = 1, threshold = 20