C#でCPU brand stringを表示

CPU brand stringを表示してみた。

using System.Runtime.Intrinsics.X86;

namespace ConsoleApp
{
    class Program
    {
        // int[] ascii hex code to string and pirint it
        static void printIntArray2String(int[] regs)
        {
            Console.Write("CPU brand string: ");
            foreach (int reg in regs)
            {
                byte[] bytes = BitConverter.GetBytes(reg);
                foreach (byte b in bytes)
                {
                    // Convert the number expressed in base-16 to an integer.
                    int value = Convert.ToInt32(b.ToString("X"), 16);
                    // Get the character corresponding to the integral value.
                    string stringValue = Char.ConvertFromUtf32(value);
                    Console.Write(stringValue);
                }
            }
            Console.WriteLine("");
        }

        // main
        static void Main(string[] args)
        {
            int[] regs = new int[4 * 4];
            int nExIds;

            // Calling __cpuid with 0x80000000 as the InfoType argument
            // gets the number of valid extended IDs.
            (nExIds, _, _, _) = X86Base.CpuId(int.MinValue, 0);    //0x80000000

            // Get the information associated with each extended ID.
            int p = 0;
            for (uint i = 0x80000000; i <= (uint)nExIds; ++i)
            {
                if (i >= 0x80000002 && i <= 0x80000004)
                {
                    (regs[p + 0], regs[p + 1], regs[p + 2], regs[p + 3])
                                                    = X86Base.CpuId((int)i, 0);
                    p += 4;
                }
            }
            printIntArray2String(regs);
        }
    }
}

実行例1：

CPU brand string: Intel(R) Core(TM) i5-6600 CPU @ 3.30GHz

実行例2：

CPU brand string: Intel(R) Core(TM) i5-4300U CPU @ 1.90GHz

実行例3：

CPU brand string: 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz