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Sehr kurzer Einblick, was x86 anders macht als andere Architekturen: The x86 architecture is the weirdo.

Update aus einem Kommentar auf HN:

The x86 has a small number (8) of general-purpose registers

x86-64 added more general-purpose registers.

The x86 uses the stack to pass function parameters; the others use registers.

OS vendors switched to registers for x86-64.

The x86 forgives access to unaligned data, silently fixing up the misalignment.

Now ubiquitous on application processors.

The x86 has variable-sized instructions. The others use fixed-sized instructions.

ARM introduced Thumb-2, with a mix of 2-byte and 4-byte instructions, in 2003. PowerPC and RISC-V also added some form of variable-length instruction support. On the other hand, ARM turned around and dropped variable-length instructions with its 64-bit architecture released in 2011.

The x86 has a strict memory model … The others have weak memory models

Still x86-only.

The x86 supports atomic load-modify-store operations. None of the others do.

As opposed to load-linked/store-conditional, which is a different way to express the same basic idea? Or is he claiming that other processors didn’t support any form of atomic instructions, which definitely isn’t true?
At any rate, ARM previously had load-linked/store-conditional but recently added a native compare-and-swap instruction with ARMv8.1.

The x86 passes function return addresses on the stack. The others use a link register.

Still x86-only.