c++ - Visual Studioを使用してopenclの乱数を生成するRandom123

Question

http://www.thesalmons.org/john/random123/releases/1.00/docs/index.html

私はOpenCLを初めて使用するため、openclとrandom123の例を見るのに苦労しています.Visual Studio 2010を使用しているときに提供された情報をどのように使用できるかわかりません.

上記の lib と Visual Studio 2010 を使用して乱数を生成するためのガイドを作成できる人。

更新: 次のように解決しましたが、実行ごとに乱数を取得するようにシードを変更するにはどうすればよいか疑問に思っています。

int main(int argc, char **argv)
{       
    const char *kernelname = "counthits";
    unsigned count =10000;

    cl_int              err;
    cl::Context         cl_context;
    cl::Program         program;
    cl::Kernel          cl_kernel;
    cl::Buffer          cl_out;
    cl::CommandQueue    cl_queue;

    size_t i, nthreads, hits_sz;
    size_t cores, work_group_size;
    cl_uint2 *          hits_host;

    double              d = 0.; // timer

    d = timer(&d);
    progname = argv[0];

    std::vector< cl::Platform > platformList;   
    CHECK(cl::Platform::get(&platformList));        
    CHECKERR(  cl_context = createCLContext(CL_DEVICE_TYPE_GPU,cl_vendor::VENDOR_AMD, &err) );

    std::vector<cl::Device> devices;
    CHECKERR( devices = cl_context.getInfo<CL_CONTEXT_DEVICES>(&err) );


    size_t length = 0;
    const char * sourceStr = loadFileToString("pi_opencl_kernel.ocl","",&length);

    cl::Program::Sources sources(1, std::make_pair(sourceStr, length));
    program = cl::Program(cl_context, sources);

    CHECK( program.build(devices,"-I D:\\libs\\Random123\\1.06\\include") );

    CHECKERR(work_group_size = devices[0].getInfo<CL_DEVICE_MAX_WORK_GROUP_SIZE>(&err) );
    CHECKERR(cores = devices[0].getInfo<CL_DEVICE_MAX_COMPUTE_UNITS>(&err) );
    cores *= 16*4; //Tahiti.

    if (work_group_size > 64) work_group_size /= 2;
    nthreads = cores * work_group_size*32; //2048*128 = 262144

    if (count == 0)
    count = NTRIES/nthreads; //38

    printf("Count: %lu\n",count);



    hits_sz = nthreads * sizeof(hits_host[0]);//2097152
    CHECKNOTZERO(hits_host = (cl_uint2 *)malloc(hits_sz));

    CHECKERR    ( cl_out = cl::Buffer(  cl_context,  CL_MEM_WRITE_ONLY | CL_MEM_USE_HOST_PTR, hits_sz, hits_host, &err));
    CHECKERR    ( cl_kernel = cl::Kernel(program,kernelname,&err) );
    CHECK       ( cl_kernel.setArg( 0, count) );
    CHECK       ( cl_kernel.setArg( 1, cl_out) );

    CHECKERR (cl_queue = cl::CommandQueue(cl_context, devices[0], 0, &err) );
    cl::Event event;

    CHECK( cl_queue.enqueueNDRangeKernel(cl_kernel,cl::NullRange,cl::NDRange(nthreads), cl::NDRange(work_group_size), NULL,  &event) );
    event.wait();
    CHECK( cl_queue.enqueueReadBuffer(cl_out, CL_TRUE, 0,hits_sz, hits_host) );

    unsigned long hits = 0, tries = 0;
    for (i = 0; i < nthreads; i++) {
#ifdef _DEBUG   
        printf("%lu %u %u\n", (unsigned long)i, hits_host[i].s[0], hits_host[i].s[1]);
#endif
    hits += hits_host[i].s[0];
    tries += hits_host[i].s[1];
    }


    return pi_check(hits, tries);
}

カーネル：

#include <Random123/threefry.h>

/*
 * counthits generates 2*n x,y points and returns hits[tid] with
 * the count of number of those points within the unit circle on
 * each thread.
 */
__kernel void counthits(unsigned n, __global uint2 *hitsp) {
    unsigned tid = get_global_id(0);
    unsigned hits = 0, tries = 0;
    threefry4x32_key_t k = {{tid, 0xdecafbad, 0xfacebead, 0x12345678}};
    threefry4x32_ctr_t c = {{0, 0xf00dcafe, 0xdeadbeef, 0xbeeff00d}};
    while (tries < n) {
        union {
            threefry4x32_ctr_t c;
            int4 i;
        } u;
        c.v[0]++;
        u.c = threefry4x32(c, k);
        long x1 = u.i.x, y1 = u.i.y;
        long x2 = u.i.z, y2 = u.i.w;
        if ((x1*x1 + y1*y1) < (1L<<62)) {
            hits++;
        }
        tries++;
        if ((x2*x2 + y2*y2) < (1L<<62)) {
            hits++;
        }
        tries++;
    }
    hitsp[tid].x = hits;
    hitsp[tid].y = tries;
}