67 lines
2.2 KiB
Python
67 lines
2.2 KiB
Python
#
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# Copyright (c) 2026 Huawei Technologies Co., Ltd. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This file is a part of the vllm-ascend project.
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#
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import torch
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import torch_npu
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from vllm_ascend.utils import maybe_trans_nz
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from .registry import register_scheme
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from .w8a8_base import AscendW8A8Linear310pScheme
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@register_scheme("W8A8S", "linear")
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class AscendW8A8SLinearMethod310(AscendW8A8Linear310pScheme):
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"""310P-only W8A8S Sparse linear scheme.
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Notes:
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- This scheme is discovered via 310P local registry.
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"""
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def apply(
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self,
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layer: torch.nn.Module,
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x: torch.Tensor,
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bias: torch.Tensor | None = None,
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tp_rank: int | None = 0,
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) -> torch.Tensor:
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if x.dtype != torch.int8:
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x = torch.ops.vllm.quantize(
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x,
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layer.aclnn_input_scale,
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layer.aclnn_input_scale_reciprocal,
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layer.aclnn_input_offset,
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)
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quant_bias = layer.quant_bias if tp_rank == 0 else None
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return torch_npu.npu_quant_matmul(
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x,
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layer.weight.data.transpose(0, 1),
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layer.deq_scale,
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bias=quant_bias,
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output_dtype=layer.params_dtype,
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)
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def process_weights_after_loading(self, layer: torch.nn.Module) -> None:
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expanding_factor = layer.weight.data.shape[1]
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layer.aclnn_input_scale = layer.input_scale.data.repeat(expanding_factor)
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layer.aclnn_input_scale_reciprocal = 1.0 / layer.aclnn_input_scale.data
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layer.aclnn_input_offset = layer.input_offset.data.repeat(expanding_factor).to(layer.aclnn_input_scale.dtype)
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layer.weight.data = maybe_trans_nz(layer.weight.data)
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