gemm_prepacked_int8.h

// Copyright (c) 2019 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.

#pragma once
#include <cmath>
#include "lite/core/context.h"
#include "lite/core/device_info.h"
#include "lite/core/tensor.h"

namespace paddle {
namespace lite {
namespace arm {
namespace math {

const int KBLOCK_INT8 = 4;
#ifdef __aarch64__
// for int7/int8 gemm
// const int HBLOCK = 4;
// const int NBLOCK = 16;
const int MBLOCK_INT8_OTH = 4;
const int NBLOCK_INT8_OTH = 16;

const int MBLOCK_INT8_DOT = 8;
const int NBLOCK_INT8_DOT = 12;

inline int get_hblock_int8(const ARMContext* ctx) {
#ifdef WITH_ARM_DOTPROD
  if (ctx->has_dot()) {
    return MBLOCK_INT8_DOT;
  } else {
    return MBLOCK_INT8_OTH;
  }
#else
  return MBLOCK_INT8_OTH;
#endif
}
#else
// const int HBLOCK = 4;
// const int WBLOCK = 8;
const int MBLOCK_INT8_OTH = 4;
const int NBLOCK_INT8_OTH = 8;

inline int get_hblock_int8(const ARMContext* ctx) { return 4; }
#endif  // __aarch64__

void prepackA_int8(void* out,
                   const void* in,
                   int ldin,
                   int m0,
                   int mmax,
                   int k0,
                   int kmax,
                   bool is_trans,
                   ARMContext* ctx);

void prepackA_int8(TensorLite* tout,
                   const TensorLite& tin,
                   int m,
                   int k,
                   int group,
                   bool is_trans,
                   ARMContext* ctx);

template <typename dtype>
void gemm_prepack_int8(const int8_t* A_packed,
                       const int8_t* B,
                       const int* bias,
                       dtype* C,
                       int M,
                       int N,
                       int K,
                       bool is_bias,
                       bool is_relu,
                       bool is_transB,
                       const float* scale,
                       ARMContext* ctx);

#define ROUNDUP(a, b) ((((a) + (b)-1) / (b)) * (b))

}  // namespace math
}  // namespace arm
}  // namespace lite
}  // namespace paddle