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54. Hans and DarkDust answer covered i386/i686 and amd64/x86_64, so there's no sense in revisiting them. This answer will focus on X32, and provide some info learned after a X32 port. x32 is an ABI for amd64/x86_64 CPUs using 32-bit integers, longs and pointers. The idea is to combine the smaller memory and cache footprint from 32-bit data ...
10. The difference is that Java binaries compiled as x86 (32-bit) or x64 (64-bit) applications respectively. On a 64-bit Windows you can use either version, since x86 will run in WOW64 mode. On a 32-bit Windows you should use only x86 obviously. For a Linux you should select appropriate type x86 for 32-bit OS, and x64 for 64-bit OS.
4. @Pacerier: simply "64-bit architecture" means nothing besides "there's some architecture where most registers are 64 bit (maybe)". x64 is a 64 bit architecture, AArch64 is a 64 bit architecture; IA64 is a 64 bit architecture; ppc64 is a 64 bit architecture; all of these have very little in common one with each other. – Matteo Italia.
it depends on the application if you need to maximize the potential of 64-bit OS, you may deploy both for handling 64-bit and 32-bit processing. However, if your application did not exceed the limits of 32-bit, you may deploy the application on x86 only, anyway it should also work on 64-bit OS via 32-bit virtualization.
9. In x86 there are 8 32 bit registers, in x64 the registers are 64 bits each and there are 8 more of them. The 128 bit SSE registers are 128 bits in both, but on x86 there are 8 of them while in x64 there are 16 of them. Also some instructions were cut in x64. In x64 mode you can still use the registers as 32 bits by using their 32 bit name ...
There is a difference between x86 and Any CPU: on a x64 system, your executable compiled for X86 will run as a 32-bit executable. As far as your suspicions go, just go to the Visual Studio 2008 command line and run the following. dumpbin YourProgram.exe /headers It will tell you the bitness of your program, plus a whole lot more.
There are 3 common ABIs usable on standard Intel-compatible machines (not Itanium). The classic 32-bit architecture, often called "x86" for short, which has triples like i[3-6]86-linux-gnu. Registers and pointers are both 32 bits. The 64-bit extension originally from AMD, often called "amd64" for short, which has GNU triple of x86_64-linux-gnu.
x64 on x86 (x64 cross-compiler) Allows you to create output files for x64. This version of cl.exe runs as a 32-bit process, native on an x86 machine and under WOW64 on a 64-bit Widows operating system. x64 on x64 Allows you to create output files for x64. This version of cl.exe runs as a native process on an x64 machine. Paraphrased:
If you really want to know everything that's going on at a lower level on x86/x64 processors/systems, I would really recommend starting with the basics, that is, 286/386 real mode code. For example, in 16-bit code you are forced to use memory segmentation which is an important concept to understand. Today's 32-bit and 64-bit operating systems ...
5. There is no difference, they will give you the same setup bootstrapper, which in turn will install the same packages. Because VS includes tooling for 64-bit development, it's offered as x86 or x64, but that's an internal classification detail which causes the dropdown to offer both. edited Mar 9, 2017 at 7:19. answered Mar 8, 2017 at 18:40.