the d20 address points to here
```
 8000d16:      	bne	0x8000d08 <core::sync::atomic::atomic_compare_exchange::h0de66025368eefbb+0x1cc> @ imm = #-0x12
 8000d18:      	subs	r0, r1, r0
 8000d1a:      	clz	r0, r0
 8000d1e:      	lsrs	r0, r0, #0x5
 8000d20:      	dmb	sy
 8000d24:      	str	r1, [sp, #0x3c]
 8000d26:      	strb.w	r0, [sp, #0x40]
```

Idk what `dmb sy` is. Sounds like an insult