Regular base instructions are always 32-bit, compressed are always 16-bit, and they're always aligned. I don't think there's a problem decoding them in parallel

Regular base instructions are always 32-bit, compressed are always 16-bit, and they're always aligned. I don't think there's a problem decoding them in parallel. You always know where the opcodes will be located in a 32-bit word - or set of 32-bit words - you're trying to decode. What I've been wondering is how difficult it is to fuse instructions when the compressed instructions you're trying to fuse isn't aligned to a 32-bit word.