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PI2.cpp
255 lines (200 loc) · 16.7 KB
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PI2.cpp
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#include "err_code.h"
#include "PI2.hpp"
#include "cl.hpp"
#include "ttmath/ttmath.h"
#include <iostream>
#include <array>
#include <fstream>
#include <numeric>
#include <string>
#include <functional>
#include <chrono>
#include <vector>
#include <iomanip>
const std::string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void printInDecimal(const std::vector<float> &piHexDigits);
void printInHex(const std::vector<float> &piHexDigits);
// Big<exponent, mantissa>
using MyBig = ttmath::Big<20, 60>;
cl::Platform getDefaultPlatform() {
std::vector<cl::Platform> all_platforms;
cl::Platform::get(&all_platforms);
if (all_platforms.size() == 0) {
throw new std::runtime_error("No platforms found. Check OpenCL installation!\n");
}
unsigned c;
do {
std::cout << "Select platform from given list: \n";
for (unsigned i = 0; i < all_platforms.size(); ++i) {
std::cout << i << ". " << all_platforms[i].getInfo<CL_PLATFORM_NAME>() << "\n";
}
std::cin >> c;
} while (c >= all_platforms.size());
return all_platforms[c];
}
cl::Device getDefaultDeviceForPlatform(cl::Platform default_platform) {
std::vector<cl::Device> all_devices;
default_platform.getDevices(CL_DEVICE_TYPE_ALL, &all_devices);
if (all_devices.size() == 0) {
throw std::runtime_error("No devices found. Check OpenCL installation!\n");
}
unsigned c;
do {
std::cout << "Select device from given list: \n";
for (unsigned i = 0; i < all_devices.size(); ++i) {
std::cout << i << ". " << all_devices[i].getInfo<CL_DEVICE_NAME>() << "\n";
}
std::cin >> c;
} while (c >= all_devices.size());
return all_devices[c];
}
std::string getKernelCodeFromFile(std::string filename) {
std::ifstream t(filename);
if (!t.is_open()) {
throw std::runtime_error("Cannot open file " + filename + "\n");
}
return std::string((std::istreambuf_iterator<char>(t)), std::istreambuf_iterator<char>());
}
int main(int argc, char *argv[]) {
cl::Platform default_platform;
cl::Device default_device;
try {
default_platform = getDefaultPlatform();
default_device = getDefaultDeviceForPlatform(default_platform);
std::cout << "Using platform: " << default_platform.getInfo<CL_PLATFORM_NAME>() << std::endl;
std::cout << "Using device: " << default_device.getInfo<CL_DEVICE_NAME>() << std::endl;
cl::Context context(default_device);
std::string source;
source = getKernelCodeFromFile("pi_kernel.cl");
cl::Program program(context, source, true);
cl::Kernel ko_pi(program, "pi");
cl::CommandQueue queue(context, default_device);
auto pi = cl::make_kernel<int, int, cl::Buffer>(program, "pi");
if (argc > 1) {
int FROM = argc > 1 ? std::stoi(argv[1]) : 1;
int DECIMAL_PLACES = argc > 2 ? std::stoi(argv[2]) : 100;
const ::size_t MAX_WORK_GROUPS = default_device.getInfo<CL_DEVICE_MAX_WORK_GROUP_SIZE>();
const ::size_t WORK_GROUP_SIZE = ko_pi.getWorkGroupInfo<CL_KERNEL_WORK_GROUP_SIZE>(default_device);
const ::size_t CALCULATED_WORK_GROUPS = static_cast<size_t>(std::ceil(
static_cast<float>(DECIMAL_PLACES) / static_cast<float>(WORK_GROUP_SIZE)));
const ::size_t NUMBER_OF_WORK_GROUPS =
CALCULATED_WORK_GROUPS > MAX_WORK_GROUPS ? MAX_WORK_GROUPS : CALCULATED_WORK_GROUPS;
std::vector<float> piHexDigits((unsigned long) DECIMAL_PLACES);
std::cout << NUMBER_OF_WORK_GROUPS << " work groups of size " << WORK_GROUP_SIZE << "\n";
cl::Buffer d_piHexDigits(context, CL_MEM_WRITE_ONLY, sizeof(float) * DECIMAL_PLACES);
auto start = std::chrono::system_clock::now();
pi(cl::EnqueueArgs(
queue,
cl::NDRange(WORK_GROUP_SIZE)
),
FROM,
DECIMAL_PLACES,
d_piHexDigits
);
cl::copy(queue, d_piHexDigits, piHexDigits.begin(), piHexDigits.end());
auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(
std::chrono::system_clock::now() - start);
printInHex(piHexDigits);
printInDecimal(piHexDigits);
std::cout << "\7" << std::endl;
auto elapsed_time = duration.count() / 1000.0;
std::cout << "Time: " << elapsed_time << "s" << std::endl;
} else {
const int MAX_DECIMALS = 8366;
const int DECIMAL_PLACES = 10;
const ::size_t MAX_WORK_GROUPS = default_device.getInfo<CL_DEVICE_MAX_WORK_GROUP_SIZE>();
const ::size_t WORK_GROUP_SIZE = ko_pi.getWorkGroupInfo<CL_KERNEL_WORK_GROUP_SIZE>(default_device);
const ::size_t CALCULATED_WORK_GROUPS = static_cast<size_t>(std::ceil(
static_cast<float>(DECIMAL_PLACES) / static_cast<float>(WORK_GROUP_SIZE)));
const ::size_t NUMBER_OF_WORK_GROUPS =
CALCULATED_WORK_GROUPS > MAX_WORK_GROUPS ? MAX_WORK_GROUPS : CALCULATED_WORK_GROUPS;
std::cout << NUMBER_OF_WORK_GROUPS << " work groups of size " << WORK_GROUP_SIZE << "\n";
auto start = std::chrono::system_clock::now();
for (int currentDecimalPlace = 1;
currentDecimalPlace < MAX_DECIMALS; currentDecimalPlace += DECIMAL_PLACES) {
std::vector<float> piHexDigits((unsigned long) DECIMAL_PLACES);
cl::Buffer d_piHexDigits(context, CL_MEM_WRITE_ONLY, sizeof(float) * DECIMAL_PLACES);
pi(cl::EnqueueArgs(
queue,
cl::NDRange(WORK_GROUP_SIZE)
),
currentDecimalPlace,
DECIMAL_PLACES,
d_piHexDigits
);
cl::copy(queue, d_piHexDigits, piHexDigits.begin(), piHexDigits.end());
for (unsigned i = 0; i < piHexDigits.size(); ++i) {
char a = PI_REF[currentDecimalPlace + i - 1];
char b = hexFromFloat(piHexDigits.at(i));
if (a == b) {
std::cout << "Test " << currentDecimalPlace + i << "\033[32;1m PASSED\033[0m\n";
} else {
std::cerr << "Test " << currentDecimalPlace + i << "\033[31;1m FAILED\033[0m" << std::endl;
return 1;
}
}
}
auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(
std::chrono::system_clock::now() - start);
std::cout << "\7" << std::endl;
auto elapsed_time = duration.count() / 1000.0;
std::cout << "Time: " << std::setprecision(10) << elapsed_time << "s" << std::endl;
}
} catch (const std::exception &e) {
std::cerr << e.what();
exit(1);
}
return 0;
}
void printInDecimal(const std::vector<float> &piHexDigits) {
const int length = static_cast<const int>(piHexDigits.size());
MyBig piDec(3.0);
for (unsigned i = 0; i < length; ++i) {
MyBig x(16.0);
x.Pow(i + 1);
piDec += MyBig(decIntFromHexFloat(piHexDigits[i])) / x;
}
MyBig x(16.0);
x.Pow((signed long)length);
x.Log(x, 10);
x = x - 0.5;
x.Round();
const unsigned long preciseDecimals = x.ToUInt();
std::cout << "precise decimals: " << preciseDecimals << std::endl << std::endl;
std::cout << "in decimal: " << std::string(piDec.ToString(), 0, preciseDecimals + 2) << std::endl << std::endl;
}
void printInHex(const std::vector<float> &piHexDigits) {
std::cout << "\nin hex: 3.";
for (auto &&i : piHexDigits) {
std::cout << hexFromFloat(i);
}
std::cout << std::endl << std::endl;
}
// int main () {
// const int LENGTH = 100;
// char pi[LENGTH];
// for (int i = 1; i < LENGTH + 1; ++i) {
// pi[i-1] = hexFromFloat(bbpAlgorithm(i));
// }
// std::cout << "3.";
// for (auto &&i : pi) {
// std::cout << i;
// }
// std::cout << std::endl;
// float pi_dec = 3.0f;
// for (int i = LENGTH - 1; i >= 0; --i) {
// char h = pi[i];
// int v;
// if (h >= '0' && h <= '9') {
// v = h - '0';
// } else if (h >= 'A' && h <= 'F') {
// v = h - 'A' + 10;
// } else {
// continue;
// }
// pi_dec += std::pow(16.0f, -(i + 1)) * static_cast<float>(v);
// }
// std::cout.precision(LENGTH);
// std::cout << pi_dec << std::endl;
// return 0;
// }