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main.cpp
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main.cpp
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#include <QDebug>
#include <CL/opencl.h>
#include <iostream>
#include <fstream>
using namespace std;
QString errToStr(int err){
switch (err) {
case CL_SUCCESS:
return "CL_SUCCESS";
case CL_DEVICE_NOT_FOUND:
return "CL_DEVICE_NOT_FOUND";
case CL_DEVICE_NOT_AVAILABLE:
return "CL_DEVICE_NOT_AVAILABLE";
case CL_OUT_OF_RESOURCES:
return "CL_OUT_OF_RESOURCES";
case CL_OUT_OF_HOST_MEMORY:
return "CL_OUT_OF_HOST_MEMORY";
case CL_INVALID_VALUE:
return "CL_INVALID_VALUE";
case CL_INVALID_DEVICE_TYPE:
return "CL_INVALID_DEVICE_TYPE";
case CL_INVALID_PLATFORM:
return "CL_INVALID_PLATFORM";
case CL_INVALID_DEVICE:
return "CL_INVALID_DEVICE";
case CL_INVALID_PROPERTY:
return "CL_INVALID_PROPERTY";
default:
return "qq";
}
}
QString deviceTypeToStr(cl_device_type deviceType){
switch (deviceType) {
case CL_DEVICE_TYPE_CPU:
return "CL_DEVICE_TYPE_CPU";
case CL_DEVICE_TYPE_GPU:
return "CL_DEVICE_TYPE_GPU";
case CL_DEVICE_TYPE_ACCELERATOR:
return "CL_DEVICE_TYPE_ACCELERATOR";
case CL_DEVICE_TYPE_CUSTOM:
return "CL_DEVICE_TYPE_CUSTOM";
case CL_DEVICE_TYPE_DEFAULT:
return "CL_DEVICE_TYPE_DEFAULT";
case CL_DEVICE_TYPE_ALL:
return "CL_DEVICE_TYPE_ALL";
default:
return "qq";
}
}
cl_device_id getDeviceByType(cl_device_type deviceType, int *err){
uint num_platforms;
*err = clGetPlatformIDs(0, nullptr, &num_platforms);
if(*err != CL_SUCCESS)
return nullptr;
cl_platform_id platform_ids[num_platforms];
*err = clGetPlatformIDs(num_platforms, platform_ids, nullptr);
if(*err != CL_SUCCESS)
return nullptr;
for (cl_platform_id* i = platform_ids; i < platform_ids + num_platforms; ++i) {
uint numDevices;
*err = clGetDeviceIDs(*i, CL_DEVICE_TYPE_ALL, 0, nullptr, &numDevices);
if(*err != CL_SUCCESS)
continue;
cl_device_id deviceIds[numDevices];
*err = clGetDeviceIDs(*i, CL_DEVICE_TYPE_ALL, numDevices, deviceIds, nullptr);
if(*err != CL_SUCCESS)
continue;
for (cl_device_id* d = deviceIds; d < deviceIds + numDevices; ++d) {
cl_device_type newDeviceType;
*err = clGetDeviceInfo(*d, CL_DEVICE_TYPE, sizeof(cl_device_type), &newDeviceType, nullptr);
if(deviceType == newDeviceType){
*err = CL_SUCCESS;
return *d;
}
}
}
*err = CL_DEVICE_NOT_FOUND;
return nullptr;
}
string loadProgrammSource(string path){
string rez;
ifstream f(path);
if(f.fail())
return "";
string line;
while (!f.eof()){
getline(f, line);
if(f.fail())
return "";
rez.append(line).push_back('\n');
}
return rez;
}
int main(int argc, char *argv[]){
int err;
auto device = getDeviceByType(CL_DEVICE_TYPE_GPU, &err);
if(err != CL_SUCCESS)
return -1;
auto ctx = clCreateContext(nullptr, 1, &device, nullptr, nullptr, &err);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
auto commandQue = clCreateCommandQueue(ctx, device, 0, &err);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
size_t datacount = 5;
auto cmDevSrcA = clCreateBuffer(ctx, CL_MEM_READ_ONLY, sizeof(cl_float) * datacount, nullptr, &err);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
auto cmDevSrcB = clCreateBuffer(ctx, CL_MEM_READ_ONLY, sizeof(cl_float) * datacount, nullptr, &err);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
auto cmDevDst = clCreateBuffer(ctx, CL_MEM_WRITE_ONLY, sizeof(cl_float) * datacount, nullptr, &err);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
auto source = loadProgrammSource("./vectorAdd.cl");
qDebug()<<source.empty();
if(source.empty())
return -1;
cout<<source;
int numProgramm = 1;
char const *sources[numProgramm];
sources[0] = source.c_str();
size_t sourceslengs[numProgramm];
sourceslengs[0] = source.size();
cl_program prog = clCreateProgramWithSource(ctx, 1,sources, sourceslengs, &err);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
err = clBuildProgram(prog, 0, nullptr, nullptr, nullptr, nullptr);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
cl_kernel kernel = clCreateKernel(prog, "VectorAdd", &err);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
int argumentIndex = 0;
clSetKernelArg(kernel, argumentIndex++, sizeof(cl_mem), (void*)&cmDevSrcA);
clSetKernelArg(kernel, argumentIndex++, sizeof(cl_mem), (void*)&cmDevSrcB);
clSetKernelArg(kernel, argumentIndex++, sizeof(cl_mem), (void*)&cmDevDst);
clSetKernelArg(kernel, argumentIndex++, sizeof(cl_int), (void*)&datacount);
float srcA[] = {4, 4, 6, 9, 2};
float srcB[] = {9, 5, 9, 7, 6};
err = clEnqueueWriteBuffer(commandQue, cmDevSrcA, CL_FALSE, 0, sizeof(cl_float) * datacount, srcA, 0, nullptr, nullptr);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
err = clEnqueueWriteBuffer(commandQue, cmDevSrcB, CL_FALSE, 0, sizeof(cl_float) * datacount, srcB, 0, nullptr, nullptr);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
err = clEnqueueNDRangeKernel(commandQue, kernel, 1, nullptr, &datacount, nullptr, 0, nullptr, nullptr);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
float dst[datacount];
err = clEnqueueReadBuffer(commandQue, cmDevDst, CL_TRUE, 0, sizeof(cl_float) * datacount, dst, 0, nullptr, nullptr);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
for(auto i: dst){
qDebug()<<i;
}
err = clRetainKernel(kernel);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
err = clReleaseProgram(prog);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
err = clRetainContext(ctx);
qDebug()<<errToStr(err);
if(err != CL_SUCCESS)
return -1;
return 0;
}