Gemm.h

/* Copyright (c) 2016 Baidu, Inc. All Rights Reserved.
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==============================================================================*/

#pragma once

// 矩阵取值运算宏，假设矩阵按列存储
#define A(i, j) A[(j)*lda + (i)]
#define B(i, j) B[(j)*ldb + (i)]
#define C(i, j) C[(j)*ldc + (i)]

// 分块计算的块大小，mc 与 kc 分别对应分块计算时的 m 与 k
#define MC 384
#define KC 384
#define NC 4096
#define MR 4
#define NR 4

#define s_min(i, j) ((i) < (j) ? (i) : (j))

namespace paddle_mobile {
namespace operators {
namespace math {

// 将 A 矩阵分块复制到连续内存
void PackMatrixA(int m, int k, int paddingM, const float *A, int lda,
                 float *buffer);

// 将 B 矩阵分块复制到连续内存
void PackMatrixB(int k, int n, int paddingN, const float *B, int ldb,
                 float *buffer);

// 分块矩阵乘法
void InnerKernel(int m, int n, int k, const float *A, int lda, const float *B,
                 int ldb, float *C, int ldc, int first_time);

// 计算一个更小的 4 * 4 的 C 矩阵分块
void AddDot4x4(int k, const float *A, int lda, const float *B, int ldb,
               float *C, int ldc, int mc, int nc);

// 32位 float 矩阵乘法
void sgemm(int m, int n, int k, float alpha, const float *A, int lda,
           const float *B, int ldb, float beta, float *C, int ldc);

// 64位 double 矩阵乘法
void dgemm(int m, int n, int k, float alpha, const double *A, int lda,
           const double *B, int ldb, float beta, double *C, int ldc);

}  // namespace math
}  // namespace operators
}  // namespace paddle_mobile