[PATCH][binutils][Arm] Removed warning for no longer UNPREDICTABLE MVE instructions.

[Andre Vieira (lists)]

Hi Barney,

Thanks for the patch! Looks good to me but you will need approval from a 
maintainer.

Cheers,
Andre

On 08/07/2019 17:38, Barnaby Wilks wrote:
> Hello,
> 
> This patch addresses the change in the June Armv8.1-M Mainline specification, that marks certain MVE instructions as
> no longer UNPREDICTABLE when a source operand is the same as a destination operand for a 32-bit element size.
> The instructions that this change apply to are:
> VQDMLADH,
> VQRDMLADH,
> VQDMLSDH,
> VQRDMLSDH
> 
> The updated documentation is herehttps://static.docs.arm.com/ddi0553/bh/DDI0553B_h_armv8m_arm.pdf
> 
> Fixed this by removing the check for this warning from GAS as well as opcodes.
> 
> Added testcases to test that the warning is not generated for the instructions that have a 32-bit element size
> and the same source and destination operand. Also fixed tests that would previously check for this warning.
> 
> Cross compiled and regtested on arm-none-eabi and arm-none-linux-gnueabihf.
> 
> I don't have write access, so if it's OK then could someone commit on my behalf?
> 
> Thanks,
> Barney
> 
> gas/ChangeLog:
> 
> 2019-06-25  Barnaby Wilks  <barnaby.wilks@arm.com>
> 
> 	* config/tc-arm.c (do_mve_vqdmladh): Remove check for UNPREDICTABLE.
> 	* testsuite/gas/arm/mve-vqdmladh-bad.l: Remove tests.
> 	* testsuite/gas/arm/mve-vqdmladh-bad.s: Remove tests.
> 	* testsuite/gas/arm/mve-vqdmladh.d: New tests.
> 	* testsuite/gas/arm/mve-vqdmladh.s: New tests.
> 	* testsuite/gas/arm/mve-vqdmlsdh-bad.l: Remove tests.
> 	* testsuite/gas/arm/mve-vqdmlsdh-bad.s: Remove tests.
> 	* testsuite/gas/arm/mve-vqdmlsdh.d: New tests.
> 	* testsuite/gas/arm/mve-vqdmlsdh.s: New tests.
> 
> opcodes/ChangeLog:
> 
> 2019-06-25  Barnaby Wilks  <barnaby.wilks@arm.com>
> 
> 	* arm-dis.c (is_mve_unpredictable): Stop marking some MVE
> 	instructions as UNPREDICTABLE.
>