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- The address of the long double data will cause no less detrimental to the design of computing systems. Imagine a network of natural changes now start each 20-digit phone number you'll see. - Not quite as bad, but like the example above, if the sum of 12 + 34, CPU registers Longer advantage, but if the calculation is 1 + 2, why? This time the two CPUs 32-bit and 64-bit are the same speed alone. - The trouble with software: Software CPU who ordered what. 12 + 34 as the example above, the 32-bit software will make the CPU perform 1 + 3, 2 + 4, then transplant results back. 64-bit software will protect computer CPU straight 12 + 34 always. You will see that if the 32-bit software running on 64-bit CPU 64-bit operating system, it still runs well, though not optimal. But if the 64-bit software, it will not be able to operate with the CPU or 32-bit operating system. This is why Microsoft and many development studios to make two versions of the same software. For example, Windows 7 and Windows 8 32-bit and 64-bit; Microsoft Office 32-bit and 64-bit. - For mobile devices, this will cause the app maker hesitate to write applications for 64-bit processors, because it will only run on a very small number, at least as of the moment. But if they just wrote for the 32-bit app, it will not take advantage of 64-bit CPU. Therefore, as well as on the PC, if developers want their app optimized for 64-bit, it must make two different versions, and takes time, effort and money than a lot of maintenance and upgrade later.
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