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Apple did it, not ARM. Apple designs the chips: https://en.wikipedia.org/wiki/Apple-designed_processors https://en.wikipedia.org/wiki/Apple-designed_processor

Apple did it, not ARM. Apple designs the chips: https://en.wikipedia.org/wiki/Apple-designed_processors https://en.wikipedia.org/wiki/Apple-designed_processors Specifically, Apple has an ARM "architectural license", which is for companies "designing their own CPU cores using the ARM instruction sets. These cores must comply fully with the ARM architecture. Companies that have designed cores that implement an ARM architecture include Apple, AppliedMicro, Broadcom, Cavium (now: Marvell), Nvidia, Qualcomm, and Samsung Electronics. https://en.wikipedia.org/wiki/ARM_architecture#Licensing https://en.wikipedia.org/wiki/ARM_architecture#Licensing

etaoins 8y ago
This is an instruction specified in the ARMv8.3‑A instruction set. It was specified and designed by ARM, not Apple. Apple is merely the first to ship silicon implementing v8.3-A.
kbumsik 8y ago
Again, ARM did it, not Apple. ARM designed that JS-optimized instruction. Apple just follows (and it has to) ARM specification in Apple’s own way. Don’t confuse between ISA design and its chip implementation design.
- dannyw 8y ago
  Don't think for a sec that ARM doesn't design ISAs without talking to vendors like Apple.
- JohnBooty 8y ago
  Thanks for the correction.
mav3rick 8y ago
The ISA is all ARM the microarchitecture is the vendor i.e. Apple.