mono/benchmark/regvar.cs

   1 //
   2 // We get stuff like:
   3 //  48: 8b c3                   mov    eax,ebx
   4 //  4a: 8b cf                   mov    ecx,edi
   5 //  4c: 0b c1                   or     eax,ecx
   6 //  4e: 8b d8                   mov    ebx,eax
   7 //
   8
   9 using System;
  10 class T {
  11         static void Main () {
  12                 int i = Environment.TickCount;
  13                 new T ().X ();
  14                 Console.WriteLine (Environment.TickCount - i);
  15         }
  16
  17         void X () {
  18                 int a = 0, b = 0, c = 0, d = 0;
  19                 for (int i = 0; i < 50000000; i ++) {
  20
  21
  22                         a |= b;
  23                         b |= c;
  24                         c |= d;
  25                         b |= d;
  26
  27                         a ^= b;
  28                         b ^= c;
  29                         c ^= d;
  30                         b ^= d;
  31
  32                         a &= b;
  33                         b &= c;
  34                         c &= d;
  35                         b &= d;
  36
  37                         a += b;
  38                         b += c;
  39                         c += d;
  40                         b += d;
  41                 }
  42         }
  43 }