Hi,

This patch adds support for MVE instructions VMAX, VMAXA, VMAXNM, 
VMAXNMA, VMIN, VMINA, VMINNM, and VMINNMA.

gas/ChangeLog:

2019-05-01  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* config/tc-arm.c (do_mve_vmaxa_vmina): New encoding function.
	(do_mve_vmaxnma_vminnma): Likewise.
	(do_neon_dyadic_if_su): Change to support MVE variants.
	(do_vmaxnm): Likewise.
	(insns): Change to accept MVE variants and add new.
	* testsuite/gas/arm/mve-vmax-vmin-bad.d: New test.
	* testsuite/gas/arm/mve-vmax-vmin-bad.l: New test.
	* testsuite/gas/arm/mve-vmax-vmin-bad.s: New test.
	* testsuite/gas/arm/mve-vmaxa-vmina-bad.d: New test.
	* testsuite/gas/arm/mve-vmaxa-vmina-bad.l: New test.
	* testsuite/gas/arm/mve-vmaxa-vmina-bad.s: New test.
	* testsuite/gas/arm/mve-vmaxnm-vminnm-bad.d: New test.
	* testsuite/gas/arm/mve-vmaxnm-vminnm-bad.l: New test.
	* testsuite/gas/arm/mve-vmaxnm-vminnm-bad.s: New test.
	* testsuite/gas/arm/mve-vmaxnma-vminnma-bad.d: New test.
	* testsuite/gas/arm/mve-vmaxnma-vminnma-bad.l: New test.
	* testsuite/gas/arm/mve-vmaxnma-vminnma-bad.s: New test.