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

[Barnaby Wilks <Barnaby dot Wilks at arm dot com>]

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.

Attachment: no-warn-unpredictable-mve.txt
Description: no-warn-unpredictable-mve.txt