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"""
Registry of elementwise epilogues
Elementwise epilogues can be added to many CUTLASS kernels in the CUTLAS Python interface via
code like the following for GEMM:
.. highlight:: python
.. code-block:: python
plan = cutlass.op.Gemm(element=cutlass.DataType.f32, layout=cutlass.LayoutType.RowMajor)
plan.activation = cutlass.epilogue.relu
"""
from cutlass.backend import epilogue
gelu = epilogue.gelu
hardswish = epilogue.hardswish
identity = epilogue.identity
leaky_relu = epilogue.leaky_relu
relu = epilogue.relu
sigmoid = epilogue.sigmoid
silu = epilogue.silu
tanh = epilogue.tanh
_activations = [gelu, hardswish, identity, leaky_relu, relu, sigmoid, silu, tanh]
[docs]def get_activations() -> list:
"""
Returns a list of available activation functions
:return: list of available activation functions
:rtype: list
"""
return _activations
[docs]def get_activation_epilogue(
activation,
element_output,
elements_per_access,
element_accumulator,
element_compute,
):
"""
Return an epilogue corresponding to the activation function, data types, and alignment
used in the kernel
:param activation: elementwise activation function to use
:param element_output: data type of the output
:param elements_per_access: alignment of operand C of the kernel
:type elements_per_access: int
:param element_accumulator: data type of the accumulated output C
:param element_compute: data type in which compute operations should be performed
:return: epilogue functor
"""
if activation not in _activations:
raise Exception(
f"Unsupported activation type {activation}. Available activations are: {_activations}"
)
if activation == identity:
return epilogue.LinearCombination(
element_output, elements_per_access, element_accumulator, element_compute
)
else:
return epilogue.LinearCombinationGeneric(
activation(element_compute),
element_output,
elements_per_access,
element_accumulator,
element_compute,
)