instructionsetLevel.cpp

Go to the documentation of this file.

/*
 * instructionsetLevel.cpp
 *
 *  Created on: Feb 3, 2015
 *      Author: Marco Clemencic
 */

#include <GaudiKernel/System.h>

#include <iostream>
#include <string>
#include <vector>

int main(int argc, char* argv[]){

  // These names are those reported in flags field of /proc/cpuinfo on Linux
  // See arch/x86/include/asm/cpufeature.h
  std::vector<std::string> sets{
    // "80386",
    "sse",
    "sse2",
    "sse3",   // FIXME: This is not reported by Linux (?)
    "ssse3",
    "sse4_1",
    "sse4_2",
    "avx",
    "avx2",
    "avx512f" // FIXME: This is not reported by Linux (?)
  };

  if (argc == 1) {
    size_t level = System::instructionsetLevel() - 1;
    if (level < sets.size())
      for(int i = System::instructionsetLevel() - 1; i >= 0; --i){
        std::cout << sets[i] << std::endl;
      }
    else {
      std::cout << "unknown instruction set level: " << level << std::endl;
      return 2;
    }
  } else if ((argc == 2) && (std::string{"all"} == std::string{argv[1]})) {
    for(auto& s: sets)
      std::cout << s << std::endl;
  } else {
    std::cout << "Error: wrong arguments\nUsage:\n\t" << argv[0] << " [all]"
        << std::endl;
    return 1;
  }

  return 0;
}