vectorization.cuh

#pragma once
/*
 
 * Copyright (c) 2024, The vLLM team.
 *
 * 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.
 */
/**
 * __device__ datatypes vectorized by 4
 */

// Include Hygon fp8 types to avoid circular import
// TODO(luka/varun) use FP8_TYPE instead after refactoring
#include <hip/hip_runtime.h>
#include <hip/hip_fp8.h>
namespace vllm {

// Vectorization containers
template <typename scalar_t>
struct __align__(8) vec4_t {
  scalar_t x;
  scalar_t y;
  scalar_t z;
  scalar_t w;
};

template <typename quant_type_t>
struct __align__(4) q8x4_t {
  static_assert(std::is_same_v<quant_type_t, int8_t> ||
                std::is_same_v<quant_type_t, __hip_fp8_e4m3> ||
                std::is_same_v<quant_type_t, _BitInt(8)>);
  quant_type_t x;
  quant_type_t y;
  quant_type_t z;
  quant_type_t w;
};

}  // namespace aiter