i am new to opencl and run the example (gt100,vs2005+xp) ,but it does not work normally.
all the results are "-858993460" ,and i need help ,thanks!
#include "stdio.h"
#include "stdlib.h"
#include <cl.h>
isgust;
#define SIZE 20
// *********************************************************************
const char *OpenCLSource[]={
"__kernel void VectorAdd(___global int *c,__global int *a,__global int *b)",
"{",
"int n=get_global_id(0);",
"c
"}"
};
//const char *OpenCLSource="Vector.cl";
int main(int argc, char **argv)
{
int HostVect1[SIZE],HostVect2[SIZE],HostOutputVector[SIZE];
for(int i=0;i<SIZE;i++){
HostVect1=(rand()%1000);
HostVect2=(rand()%1000);
}
cl_context GPUcontext=clCreateContextFromType(0,CL_DEVICE_TYPE_GPU,NULL,NULL,NULL);
size_t ParmDataBytes;
clGetContextInfo(GPUcontext,CL_CONTEXT_DEVICES,0,NULL,&ParmDataBytes);
cl_device_id *GPUDevices=(cl_device_id*)malloc(sizeof(ParmDataBytes));
clGetContextInfo(GPUcontext,CL_CONTEXT_DEVICES,ParmDataBytes,GPUDevices,NULL);
cl_command_queue GPUCommandQueue=clCreateCommandQueue(GPUcontext,GPUDevices[0],0,NULL);
cl_mem GPUVector1=clCreateBuffer(GPUcontext,CL_MEM_READ_ONLY|CL_MEM_COPY_HOST_PTR,sizeof(int)*SIZE,HostVect1,NULL);
cl_mem GPUVector2=clCreateBuffer(GPUcontext,CL_MEM_READ_ONLY|CL_MEM_COPY_HOST_PTR,sizeof(int)*SIZE,HostVect2,NULL);
cl_mem GPUOutputVecotr=clCreateBuffer(GPUcontext,CL_MEM_WRITE_ONLY,sizeof(int)*SIZE,NULL,NULL);
clEnqueueWriteBuffer(GPUCommandQueue,GPUVector1,CL_TRUE,0,sizeof(int)*SIZE,HostVect1,0,NULL,NULL);
clEnqueueWriteBuffer(GPUCommandQueue,GPUVector2,CL_TRUE,0,sizeof(int)*SIZE,HostVect2,0,NULL,NULL);
cl_program OpenCLProgram=clCreateProgramWithSource(GPUcontext,5,OpenCLSource,NULL,NULL);
clBuildProgram(OpenCLProgram,0,NULL,NULL,NULL,NULL);
cl_kernel VectorAdd1=clCreateKernel(OpenCLProgram,"VectorAdd",NULL);
clSetKernelArg(VectorAdd1,0,sizeof(cl_mem),(void *)&GPUOutputVecotr);
clSetKernelArg(VectorAdd1,1,sizeof(cl_mem),(void *)&GPUVector1);
clSetKernelArg(VectorAdd1,2,sizeof(cl_mem),(void *)&GPUVector2);
size_t WorkSize[1]={SIZE};
clEnqueueNDRangeKernel(GPUCommandQueue,VectorAdd1,1,NULL,WorkSize,NULL,0,NULL,NULL);
// int HostOutputVector[SIZE];
clEnqueueReadBuffer(GPUCommandQueue,GPUOutputVecotr,CL_TRUE,0,SIZE*sizeof(int),HostOutputVector,0,NULL,NULL);
clFinish(GPUCommandQueue);
HostOutputVector[3]=300;
for(int rows=0;rows<SIZE;rows++,printf("\n")){
printf("%d",HostOutputVector[rows]);
}
free(GPUDevices);
clReleaseKernel(VectorAdd1);
clReleaseProgram(OpenCLProgram);
clReleaseCommandQueue(GPUCommandQueue);
clReleaseContext(GPUcontext);
clReleaseMemObject(GPUVector1);
clReleaseMemObject(GPUVector2);
clReleaseMemObject(GPUOutputVecotr);
getchar();
return 0;
}
