Yes designing new instructions when one sees a need for it is fairly common. x86 just has 5 decades worth of add-ons by now, so it is kind of expected that it looks a bit bloated from afar.

For an old CPU, finding all the valid instructions wasn’t very hard. You simply tried them all. Sure, really old CPUs might make it hard to tell what the instruction did, but once CPUs got il… ...

The x86 instruction set, first introduced with Intel's 8086 and still alive and well in the Pentium IV, has long been decried as mostly dead. Ironically, most of today's x86-compatibles still ...

Arm is RISC (Reduced Instruction Set Computing) based, while x86 is CISC (Complex Instruction Set Computing). Arm’s CPU instructions are reasonably atomic, with a very close correlation between ...

It expands the entire x86 instruction set, granting access to more registers and introducing new features to enhance overall CPU performance. APX, according to Intel, ...

x86-64v3 essentially adds AVX2, MOVBE, FMA, and some additional bit manipulation instructions. However, the advent of the 64-bit era didn’t signify the end of progress for x86.

x86 is a complex instruction set computer (CISC) instruction set architecture (ISA) developed some 48 years ago. However, internally, modern x86 cores rely on proprietary engines running a reduced ...

Intel Corp. and Advanced Micro Devices Inc. today launched an industry group dedicated to improving the x86 instruction set architecture.Besides the two chipmakers, the consortium, announced at th ...

The x86 instruction set was first introduced by Intel in 1978 with the 8086 16-bit CPU, and the Santa Clara corporation is now planning to finally bring its computer processors into the future ...

x86, the mainstream instruction set architecture for PC CPUs, originated from the Intel 8086 processor and has been in use for 46 years. Technology blog Hackaday claims that x86 will be extinct in ...

This is a big deal. Microsoft Windows runs applications written for either x86 or Arm processors, though the version of Windows has to match up with the specific instruction set.