[monocasa]

I would love to see a newer CISC that didn't have all these required prefixes, and took a more Huffman encoding perspective so that instructions like hlt aren't allocated a single byte. Memory to memory ops essientially let you encode physical registers without using architectural registers, saving additional bits too.

[phire]

I have encountered an instruction set which supported 16bit, 32bit, 48bit and 80bit encodings.

Was basically Thumb2 but with more flexibility, and it still felt like RISC.