Created
January 19, 2017 02:51
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public static void Main(string[] args) | |
{ | |
var x = Flip(10000); | |
var y = FlipNew(10000); | |
////var bench = new ReverseBench(); | |
////bench.FlipInSets64Bit(); | |
//BenchmarkRunner.Run<ReverseBench>(); | |
} | |
public unsafe static ulong Flip(ulong val) | |
{ | |
//ulong val = 0; | |
//Unsafe.Write(&val, value); | |
val = (val << 56) | |
| ((val & 0xFF00U) << 40) | |
| ((val & 0xFF0000U) << 24) | |
| ((val & 0xFF000000U) << 8) | |
| ((val & 0xFF00000000U) >> 8) | |
| ((val & 0xFF0000000000U) >> 24) | |
| ((val & 0xFF000000000000UL) >> 40) | |
| (val >> 56); | |
//return Unsafe.Read<ulong>(&val); | |
return val; | |
} | |
public unsafe static ulong FlipNew(ulong val) | |
{ | |
//ulong val = 0; | |
//Unsafe.Write(&val, value); | |
val = ((val & 0xFFFF0000FFFF0000UL) >> 16) | ((val & 0x0000FFFF0000FFFFUL) << 16); | |
val = ((val >> 8) & 0xFF00FF00FF00FF00UL) | ((val << 8) & 0x00FF00FF00FF00FFUL); | |
val = (val << 32) | (val >> 32); | |
//return Unsafe.Read<ulong>(&val); | |
return val; | |
} |
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