[PATCH, GCC, AARCH64, 2/6] Add new arch command line feaures from ARMv8.5-A

[James Greenhalgh]

On Fri, Nov 02, 2018 at 01:37:41PM -0500, Sudakshina Das wrote:
> Hi
> 
> This patch is part of a series that enables ARMv8.5-A in GCC and
> adds Branch Target Identification Mechanism.
> (https://developer.arm.com/products/architecture/cpu-architecture/a-profile/exploration-tools)
> 
> This patch add all the command line feature that are added by ARMv8.5.
> Optional extensions to armv8.5-a:
> +rng : Random number Generation Instructions.
> +memtag : Memory Tagging Extension.
> 
> ARMv8.5-A features that are optional to older arch:
> +sb : Speculation barrier instruction.
> +ssbs: Speculative Store Bypass Safe instruction.
> +predres: Execution and Data Prediction Restriction instructions.
> 
> All of the above only effect the assembler and have already (or almost
> for a couple of cases) gone in the trunk of binutils.
> 
> Bootstrapped and regression tested with aarch64-none-linux-gnu.
> 
> Is this ok for trunk?

OK, but will need rebased to keep the AARCH64_FL_* in order.

Thanks,
James

> *** gcc/ChangeLog ***
> 
> 2018-xx-xx  Sudakshina Das  <sudi.das@arm.com>
> 
> 	* config/aarch64/aarch64-option-extensions.def: Define
> 	AARCH64_OPT_EXTENSION for memtag, rng, sb, ssbs and predres.
> 	* gcc/config/aarch64/aarch64.h (AARCH64_FL_RNG): New.
> 	(AARCH64_FL_MEMTAG, ARCH64_FL_SB, AARCH64_FL_SSBS): New.
> 	(AARCH64_FL_PREDRES): New.
> 	(AARCH64_FL_FOR_ARCH8_5): Add AARCH64_FL_SB, AARCH64_FL_SSBS and
> 	AARCH64_FL_PREDRES by default.
> 	* gcc/doc/invoke.texi: Document rng, memtag, sb, ssbs and
> 	predres.
>