OpenCL + VS2010

来源：互联网发布：js模块化开发实例编辑：程序博客网时间：2024/05/17 02:14

配置过程参考了

http://blog.csdn.net/mengfanteng/article/details/23531549

例子程序 hello world

main.cpp

#include <stdio.h>   #include <stdlib.h>   #include <CL/cl.h>   #define MEM_SIZE (128)   #define MAX_SOURCE_SIZE (0x100000)   int main()  {      cl_device_id device_id = NULL;      cl_context context = NULL;      cl_command_queue command_queue = NULL;      cl_mem memobj = NULL;      cl_program program = NULL;      cl_kernel kernel = NULL;      cl_platform_id platform_id = NULL;      cl_uint ret_num_devices;      cl_uint ret_num_platforms;      cl_int ret;      char string[MEM_SIZE];      FILE *fp;      char fileName[] = "kernel.cl";      char *source_str;      size_t source_size;      /* Load the source code containing the kernel*/      fp = fopen(fileName, "r");      if (!fp) {          fprintf(stderr, "Failed to load kernel.\n");          exit(1);      }      source_str = (char*)malloc(MAX_SOURCE_SIZE);      source_size = fread(source_str, 1, MAX_SOURCE_SIZE, fp);      fclose(fp);      /* Get Platform and Device Info */      ret = clGetPlatformIDs(1, &platform_id, &ret_num_platforms);      ret = clGetDeviceIDs(platform_id, CL_DEVICE_TYPE_DEFAULT, 1, &device_id, &ret_num_devices);      /* Create OpenCL context */      context = clCreateContext(NULL, 1, &device_id, NULL, NULL, &ret);      /* Create Command Queue */      command_queue = clCreateCommandQueue(context, device_id, 0, &ret);      /* Create Memory Buffer */      memobj = clCreateBuffer(context, CL_MEM_READ_WRITE,MEM_SIZE * sizeof(char), NULL, &ret);      /* Create Kernel Program from the source */      program = clCreateProgramWithSource(context, 1, (const char **)&source_str,(const size_t *)&source_size, &ret);      /* Build Kernel Program */      ret = clBuildProgram(program, 1, &device_id, NULL, NULL, NULL);      /* Create OpenCL Kernel */      kernel = clCreateKernel(program, "hello", &ret);      /* Set OpenCL Kernel Parameters */      ret = clSetKernelArg(kernel, 0, sizeof(cl_mem), (void *)&memobj);      /* Execute OpenCL Kernel */      ret = clEnqueueTask(command_queue, kernel, 0, NULL,NULL);      /* Copy results from the memory buffer */      ret = clEnqueueReadBuffer(command_queue, memobj, CL_TRUE, 0,          MEM_SIZE * sizeof(char),string, 0, NULL, NULL);      /* Display Result */      puts(string);      /* Finalization */      ret = clFlush(command_queue);      ret = clFinish(command_queue);      ret = clReleaseKernel(kernel);      ret = clReleaseProgram(program);      ret = clReleaseMemObject(memobj);      ret = clReleaseCommandQueue(command_queue);      ret = clReleaseContext(context);      free(source_str);      getchar();      return 0;  }

kernel.cl

__kernel void hello(__global char* string)  {      string[0] = 'H';      string[1] = 'e';      string[2] = 'l';      string[3] = 'l';      string[4] = 'o';      string[5] = ',';      string[6] = ' ';      string[7] = 'W';      string[8] = 'o';      string[9] = 'r';      string[10] = 'l';      string[11] = 'd';      string[12] = '!';      string[13] = '\0';  }

0 0