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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 types ...
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.
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.
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 ...
How to Determine if Running 32-bit (x86) or 64-bit (x64) Architecture of Windows 10 The terms 32-bit and 64-bit refer to the way a computer's processor (also called a CPU), handles information. The benefits of using a 64-bit operating system are most apparent when you have a large amount of random access memory (RAM) installed on your computer ...
When trying to install Java on my Windows 11, I saw three products available: What's the difference among them? x64 Compressed Archive x64 Installer x64 MSI Installer So far I have found a Youtube
AMD64 is used mostly by BSD, Linux and Windows internally, whereas x64 is from Microsoft and Oracle. x86_64 is primarily used by Apple, but they are all different name for a 64-bit OS. So effectively they are one of the main 64-bit instruction set of x86. They are different from ARM!
Here is a link to a complete (I think) list of NASM instructions, which I presume also covers the x64 bit instruction set for Intel processors. However, I was hoping there would be a complete list of instructions somewhere, and just that, without the verbosity of an explanation for each one.
8 Select the Language, Edition, and 32-bit (x86), 64-bit (x64), or both (32-bit and 64-bit in same ISO) Architecture you want for the ISO file, and click/tap on Next. (see screenshot below) The Windows 10 option includes both the Home and Pro editions. The product key you enter during installation (Windows Setup) is what determines which ...
x64 extends x64's 8 general-purpose registers to be 64-bit, and adds 8 new 64-bit registers. The 64-bit registers have names beginning with "r", so for example the 64-bit extension of eax is called rax. The new registers are named r8 through r15. The lower 32 bits, 16 bits, and 8 bits of each register are directly addressable in operands.