[PATCH, BINUTILS, ARM, 1/3] Add -march=armv8.5-a and related internal feature macros to AArch32

[Sudakshina Das]

Hi

Thia patch is part of the patch series to add support for ARMv8.5-A
extensions.
(https://developer.arm.com/products/architecture/cpu-architecture/a-profile/exploration-tools)

This is the first of the patch series and adds -march=armv8.5-a and
other internal feature marcos needed for it.

Testing done: Builds and reg tests all pass on arm-none-eabi and
added new test.

Ok for trunk?

Thanks
Sudi
PS. I do not have commit access so if OK can someone apply for me?


*** gas/ChangeLog ***

2018-xx-xx  Sudakshina Das  <sudi.das@arm.com>

	* config/tc-arm.c (arm_archs): New entry for armv8.5-a.
	(cpu_arch_ver): Likewise.
	* doc/c-arm.texi: Add documentation for the same.
	* testsuite/gas/arm/attr-march-armv8_5-a.d: New.

*** include/ChnageLog ***

2018-xx-xx  Sudakshina Das  <sudi.das@arm.com>

	* opcode/arm.h (ARM_EXT2_V8_5A): New.
	(ARM_AEXT2_V8_5A, ARM_ARCH_V8_5A): New.


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