unexpected NOP encodings

Alan Modra amodra@gmail.com
Mon Jun 24 15:05:00 GMT 2019


On Mon, Jun 24, 2019 at 07:56:48AM -0600, Jan Beulich wrote:
> All,
> 
> is it known (and intended) that

No, you've found a bug.

> 	.text
> 	.machine power8
> power8:
> 	nop
> 	# The NOP inserted here is controlled by the "power6" machine
> 	# setting below, not the one currently in effect.
> 	.p2align 3
> 	blr
> 
> 	.machine power6
> 
> doesn't produce the expected NOP encoding, because the encoding is
> chosen only at the end of the assembly process (i.e. when the final
> directive has already been seen and processed)?
> 
> Jan
> 

-- 
Alan Modra
Australia Development Lab, IBM



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