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Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_

...and I can confirm this strange behaviour. What's more, gcc believes the 64-bit integer (which should probably be a size_t anyway...) to be better, as using uint_fast32_t causes gcc to use a 64-bit uint. I did a bit of mucking around with the assembly: Simply take the 32-bit version, replace all 32-b...
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Programmer Puzzle: Encoding a chess board state throughout a game

...s “all subsequent legal moves”. The problem also says nothing about knowing the moves up to this point. That’s actually a problem as I’ll explain. Castling The game has proceeded as follows: e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Bc5 The board looks as follows: White has the option of castling...
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Mercurial error: abort no username supplied

Problem on WindowsXP (likely will happen on all Win installs), first time using Mercurial. I found the answer in an inobvious place so I'm asking/answering the question myself so others don't have to search like I did. ...
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一分钟明白 VS manifest 原理 - C/C++ - 清泛网 - 专注C/C++及内核技术

...ifest文件 一台pc上,用一组建往往会有不止一个版本(c:/windows/winsxs或系统目录下),程序在加载的时候,不知加载哪个,于是manifest文件来指明。 manifest在哪儿,如何创建。 如果用VS开发,可以Set通过porperty->configuration propertie...
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When to use enumerateObjectsUsingBlock vs. for

...mes down to personal preference. For me, the idiomatic and readable option wins. In this case, that is Fast Enumeration using for-in. Benchmark: NSMutableArray *arr = [NSMutableArray array]; for (int i = 0; i < 100; i++) { arr[i] = [NSString stringWithFormat:@"%d", i]; } int i; __block NSUI...
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OpenSSL and error in reading openssl.conf file

I am running windows xp 32bit 16 Answers 16 ...
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How do I properly clean up Excel interop objects?

...sing the Excel interop in C# ( ApplicationClass ) and have placed the following code in my finally clause: 41 Answers ...
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Is there a perfect algorithm for chess? [closed]

... Scripted to win is one thing. Exhaustively enumerated is a different thing. Either way, the information is perfect -- everything is known -- the game is deterministic by definition. – S.Lott Jan 3...
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SEH stack 结构探索(1)--- 从 SEH 链的最底层(线程第1个SEH结构)说起 -...

...色部分就是 Matt Pietrek 大侠在《A Crash Course on the Depths of Win32? Structured Exception Handling》 一文中说的:VC++ 生成的扩展 EXCEPTION_REGISTRATION_RECORD 结构,它象下面: EBP-00 _ebp EBP-04 trylevel EBP-08 scopetable pointer EBP-0C handler fu...
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PHP script - detect whether running under linux or Windows?

I have a PHP script that may be placed on a windows system or a linux system. I need to run different commands in either case. ...