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[Engadget] Microsoft confirms ARM support is coming in Windows - Page 4

post #31 of 32
I bet you will still have to recompile for the arm version, if not redo code/port.
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post #32 of 32
Quote:
Originally Posted by mrfajita View Post
Apple got away with it. I get massive frustration when I download the only revision of a program for my PowerPC iBook, and it won't run because its Intel only (yes my mac is that old)
I was waiting for someone to bring this up. Apple is different, because they made a full transition away from PowerPC. By replacing their current platform with one more powerful, they could easily convince people to upgrade, as well as writing Rosetta, which would have some performance cuts but in the main would allow complete compatibility for the newer Macs. Developers would simply be migrating, platform wise, and the PowerPC Macs were to be left mainly in the dust.

It's different for Arm and Windows, since they are designed to be running in parallel, with programs available for both Arm and Windows. It'll necessitate far more testing to make sure that each system is working satisfactorily.

Finally, whilst the Intel Macs were much faster than PowerPC (allowing some level of performance compromise with Rosetta) the Arm Windows computers will likely (at first) be far slower than their Intel counterparts - which means instruction translation is a bad idea, since it will make apps run even slower. It will essentially place ARM windows at a massive disadvantage.

Quote:
Originally Posted by cdoublejj View Post
I bet you will still have to recompile for the arm version, if not redo code/port.
Yep - ARM processors use different instructions, so all fully compiled languages will have to be recompiled for ARM. If the language is interpreted or compiled to bytecode (such as Java) you won't have such a problem, but obviously the language virtual machine would have to be ported in its entirety.
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