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paddlepaddle--paddle/paddle/phi/api/include/compat/c10/util/quint4x2.h
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2026-07-13 12:40:42 +08:00

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// Copyright (c) 2026 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// The file has been adapted from pytorch project
// Licensed under BSD-style license -
// https://github.com/pytorch/pytorch/blob/main/LICENSE
#pragma once
#include <cstdint>
namespace c10 {
/**
* quint4x2 is for un-signed 4 bit quantized Tensors that are packed to byte
* boundary.
*/
struct alignas(1) quint4x2 {
using underlying = uint8_t;
uint8_t val_;
quint4x2() = default;
explicit constexpr quint4x2(uint8_t val) : val_(val) {}
};
} // namespace c10
namespace at {
using c10::quint4x2;
} // namespace at
namespace torch {
using c10::quint4x2;
} // namespace torch