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A sometimes overlooked addition to the iPhone platform that debuted with the iPhone 3GS is the presence of an SIMD engine called NEON. Just like AltiVec for PowerPC and MMX/SSE for x86, this allows multiple computations to be performed at once on ARM, giving an important speedup to some algorithms, on condition that the developer specifically codes for it. Given that, among the iPhone OS devices,
Wandering Coder: A few things iOS developers ought to know about the ARM architecture by Pierre Lebeaupin 以åiPhonenã®NEONã«ã¤ãã¦æ¸ããã¨ãï¼ iOSããã¤ã¹ã®ããã»ããµã«ã¤ãã¦ãèªè ã«ç¥ã£ã¦é ãããã¨æã£ã¦ããï¼ ãããï¼ãªã³ã©ã¤ã³ã§ã®ãã£ã¹ã«ãã·ã§ã³ã§ãã®ç¥èã¯ä¸è¬çã§ã¯ãªããã¨ãåãã£ãï¼ ãï¼ãã®ç¥èã¯iPhoneããã°ã©ãã³ã°ã«ããã¦éè¦ã ã¨æããï¼ (ããNEONnãèå³ãç¡ãå ´åã ã) ããã¯Object-cã§ãã¤ã¬ãã«ããã°ã©ãã³ã°ãè¡ã£ã¦ããå ´åã§ãã ï¼ ç¥ããªãã¦ãçãã¦ãããã ããï¼ ãããç¥ãäºã§ï¼iPhoneããã°ã©ãã¨ãã¦æé·ã§ããã®ã ï¼ When I wrote my Introduction to NEON on iPhone, I cons
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