>My interpretation is that the compressed instructions extension is still work in progress C was ratified years ago, but I suspect you might have heard about Z

>My interpretation is that the compressed instructions extension is still work in progress C was ratified years ago, but I suspect you might have heard about Zc (about to be ratified, specific to 32bit, particularly helpful to microcontrollers) or B (ratified recently, bit manipulation, happens to help code density), and their effect in code density.