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# mypy: allow-untyped-defs
import torch
import torch.ao.nn.intrinsic as nni
import torch.ao.nn.quantized.dynamic as nnqd
__all__ = ["LinearReLU"]
class LinearReLU(nnqd.Linear):
r"""
A LinearReLU module fused from Linear and ReLU modules that can be used
for dynamic quantization.
Supports both, FP16 and INT8 quantization.
We adopt the same interface as :class:`torch.ao.nn.quantized.dynamic.Linear`.
Attributes:
Same as torch.ao.nn.quantized.dynamic.Linear
Examples::
>>> # xdoctest: +SKIP
>>> m = nn.intrinsic.quantized.dynamic.LinearReLU(20, 30)
>>> input = torch.randn(128, 20)
>>> output = m(input)
>>> print(output.size())
torch.Size([128, 30])
"""
_FLOAT_MODULE = nni.LinearReLU # type: ignore[assignment]
def __init__(self, in_features, out_features, bias=True, dtype=torch.qint8):
super().__init__(in_features, out_features, bias, dtype)
def forward(self, x: torch.Tensor) -> torch.Tensor:
if self._packed_params.dtype == torch.qint8:
# TODO check if we should set reduce_rage = True by default here
Y = torch.ops.quantized.linear_relu_dynamic(
x, self._packed_params._packed_params, reduce_range=True
)
elif self._packed_params.dtype == torch.float16:
Y = torch.ops.quantized.linear_relu_dynamic_fp16(
x, self._packed_params._packed_params
)
else:
raise RuntimeError("Unsupported dtype on dynamic quantized linear relu!")
return Y.to(x.dtype)
def _get_name(self):
return "DynamicQuantizedLinearReLU"
@classmethod
def from_float(cls, mod, use_precomputed_fake_quant=False):
return super().from_float(
mod, use_precomputed_fake_quant=use_precomputed_fake_quant
)
@classmethod
def from_reference(cls, ref_qlinear_relu):
return super().from_reference(ref_qlinear_relu[0])
|
