bit(field) extract with invertion

One use case came up for "ring oscillator" benchmark https://pub.pages.cba.mit.edu/ring/

currently extract, invert, insert method requires 3 instructions.
```
1:	tio.bexti a0, io12, 2
	not a0, a0
	tio.bfinserti io13, a0, 3
	b 1b
```


note that `andn` or `orn` can't be used to invert ios source due to rs2 being the inverted operand.