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I was surprised to read that Adobe discontinued the 64 bits version of Flash for Linux. While there is a new 32 bits version, and Adobe advises users to use the 32 bits version of Firefox instead.
Was wondering, as I didn’t have to do that yet, is it that hard to port an application to 64 bits? Besides the libraries changes and the recompilation (settings in the Makefile), what makes the port difficult? (Flash is an example)
As noted in an Adobe blog post, Flash’s ActionScript engine has a JIT compiler, that compiles the ActionScript code into native code.
x64 has a very different instruction set from x86. Therefore, making the JIT compiler generate x64 code is a non-trivial task, and is far more complicated than just making all the words 64 bits. 🙂