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This looks a lot like the thumb ARM thingy? The real question is why? nm: https://www.quora.com/Why-was-the-ARM-Thumb-instruction-set-created https://www.quor

• jabl 3y ago
  > This looks a lot like the thumb ARM thingy? Unsure what you asking? The RISC-V C extension has some vague similarities with thumb. But the Qualcomm proposed Zics extension absolutely hasn't. Zics adds things like more advanced addressing modes, load/store pair instructions etc. that are found in the aarch64 ISA, all with 32-bit instructions. Notable that ARM didn't create any 16-bit Thumb variant of aarch64.