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using System; | |
using System.Linq; | |
using System.Runtime.Intrinsics; | |
using System.Runtime.Intrinsics.X86; | |
using BenchmarkDotNet.Attributes; | |
using BenchmarkDotNet.Running; | |
namespace ConsoleApp29 | |
{ | |
public class Program |
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// 'valueIfTrue' and 'valueIfFalse' really should be compile-time constants for maximum throughput. | |
[MethodImpl(MethodImplOptions.AggressiveInlining)] | |
private static int ConditionalSelect(bool condition, int valueIfTrue, int valueIfFalse) | |
{ | |
// From https://software.intel.com/sites/default/files/managed/9e/bc/64-ia-32-architectures-optimization-manual.pdf | |
// Example 3.2. We're taking advantage of the fact that bools are passed by value as 32-bit integers, | |
// so we'll blit it directly into a 1 or a 0 without a jump. | |
// Codegen will emit a movzx, but on Ivy Bridge (and later) the CPU itself elides the instruction. | |
return ((-Unsafe.As<bool, int>(ref condition)) & (valueIfTrue - valueIfFalse)) + valueIfFalse; | |
} |
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@charset "utf-8"; | |
/*! normalize.css v1.1.0 | MIT License | git.io/normalize */ | |
article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section,summary{display:block}audio,canvas,video{display:inline-block;*display:inline;*zoom:1}audio:not([controls]){display:none;height:0}[hidden]{display:none}html{font-size:100%;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}html,button,input,select,textarea{font-family:sans-serif}body{margin:0}a:focus{outline:thin dotted}a:active,a:hover{outline:0}h1{font-size:2em;margin:.67em 0}h2{font-size:1.5em;margin:.83em 0}h3{font-size:1.17em;margin:1em 0}h4{font-size:1em;margin:1.33em 0}h5{font-size:.83em;margin:1.67em 0}h6{font-size:.67em;margin:2.33em 0}abbr[title]{border-bottom:1px dotted}b,strong{font-weight:bold}blockquote{margin:1em 40px}dfn{font-style:italic}hr{-moz-box-sizing:content-box;box-sizing:content-box;height:0}mark{background:#ff0;color:#000}p,pre{margin:1em 0}code,kbd,pre,samp{font-family:monospace,serif;_font-family:'courier new',monospace;f |