---
title: conv2d_direct_?
description: "Direct算法实现的通用2D卷积接口。"
url: https://www.hikunpeng.com/document/detail/zh/hpchistory/hpckit/develop2400/kunpengaccel_kml_0653.html
sourcePath: /source/zh/hpchistory/hpckit/develop2400/kunpengaccel_kml_0653.html
indexId: 9d4c3549c256bfaa434ba9cac71779098cda22fd1e6de6ef585918084862e48067
---
# conv2d_direct_?

Direct算法实现的通用2D卷积接口。

#### 接口定义

C interface：

void conv2d_direct_fp32(const float *input, const int batch, const int inputChannels, const int inputHeight, const int inputWidth, const float *kernel, const int kernelHeight, const int kernelWidth, const int strideY, const int strideX, const int padHeight, const int padWidth, const int dilationY, const int dilationX, const float *bias, float *output, const int outputChannels);

void conv2d_direct_fp16(const __fp16 *input, const int batch, const int inputChannels, const int inputHeight, const int inputWidth, const __fp16 *kernel, const int kernelHeight, const int kernelWidth, const int strideY, const int strideX, const int padHeight, const int padWidth, const int dilationY, const int dilationX, const __fp16 *bias, __fp16 *output, const int outputChannels);


#### 参数

| 参数名 | 类型 | 描述 | 输入/输出 |
| --- | --- | --- | --- |
| input | conv2d\_direct\_fp32中是float类型 conv2d\_direct\_fp16中是\_\_fp16类型 | 输入数据 | 输入 |
| batch | int类型 | 输入数据的批数 | 输入 |
| inputChannels | int类型 | 输入通道数 | 输入 |
| inputHeight | int类型 | 输入数据的高度 | 输入 |
| inputWidth | int类型 | 输入数据的宽度 | 输入 |
| kernel | conv2d\_direct\_fp32中是float类型 conv2d\_direct\_fp16中是\_\_fp16类型 | 卷积核 | 输入 |
| kernelHeight | int类型 | 卷积核的高度 | 输入 |
| kernelWidth | int类型 | 卷积核的宽度 | 输入 |
| strideY | int类型 | 卷积核在高度方向移动的步长 | 输入 |
| strideX | int类型 | 卷积核在宽度方向移动的步长 | 输入 |
| padHeight | int类型 | 在原始input数据高度方向两端分别置零的长度 | 输入 |
| padWidth | int类型 | 在原始input数据宽度方向两端分别置零的长度 | 输入 |
| dilationY | int类型 | 高度方向的膨胀系数 | 输入 |
| dilationX | int类型 | 宽度方向的膨胀系数 | 输入 |
| bias | conv2d\_direct\_fp32中是float类型 conv2d\_direct\_fp16中是\_\_fp16类型 | 偏置值, 值为NULL时表示无偏置 | 输入 |
| output | conv2d\_direct\_fp32中是float类型 conv2d\_direct\_fp16中是\_\_fp16类型 | 输出结果数据 | 输出 |
| outputChannels | int类型 | 输出通道数 | 输入 |


#### 依赖

#include "conv.h"


#### 示例

C interface：
```
int batch = 1;
int inputChannels = 1;
int inputHeight = 6;
int inputWidth = 6;
int kernelHeight = 3;
int kernelWidth = 3;
int strideY = 1;
int strideX = 1;
int padHeight = 0;
int padWidth = 0;
int dilationY = 1;
int dilationX = 1;
int outputChannels = 1;
float input[36] = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0,
7.0, 8.0, 9.0, 10.0, 11.0, 12.0,
13.0, 14.0, 15.0, 16.0, 17.0, 18.0,
19.0, 20.0, 21.0, 22.0, 23.0, 24.0,
25.0, 26.0, 27.0, 28.0, 29.0, 30.0,
31.0, 32.0, 33.0, 34.0, 35.0, 36.0};
float kernel[9] = {1.0, 2.0, 3.0,
4.0, 5.0, 6.0,
7.0, 8.0, 9.0};
float *bias = NULL;
int outputHeight = (inputHeight + 2 * padHeight - dilationY * (kernelHeight - 1) - 1) / strideY + 1;
int outputWidth = (inputWidth + 2 * padWidth - dilationX * (kernelWidth - 1) - 1) / strideX + 1;
/*
*
outputHeight x outputWidth = 4 x 4
*/
float output[16] = {0.0};
conv2d_direct_fp32(input, batch, inputChannels, inputHeight, inputWidth, kernel, kernelHeight, kernelWidth, strideY, strideX, padHeight, padWidth, dilationY, dilationX, bias, output,
outputChannels);
/*
* output = [474.0 519.0 564.0 609.0,
*           744.0 789.0 834.0 879.0,
*           1014.0 1059.0 1104.0 1149.0,
*           1284.0 1329.0 1374.0 1419.0]
*/
```