[AArch64][PATCH 1/2] Add support for RAS instruction ESB.

[Matthew Wahab]

Committed: https://sourceware.org/ml/binutils-cvs/2015-12/msg00097.html

Is this ok for the 2.26 branch?
Matthew

On 08/12/15 17:18, Matthew Wahab wrote:
> Hello,
>
> The ARMv8.2 RAS extension adds a new barrier instruction ESB as an alias
> and the preferred form of HINT 16.
>
> This patch adds an architectural feature flag for the RAS extension and
> includes it in the features selected enabled by -march=armv8.2-a. It
> also adds the ESB instruction, making it available whenever the RAS
> feature is enabled.
>
> Because ESB is the preferred form and because the target architecture
> isn't available to the disassembler, HINT 16 will be disassembled as ESB
> even when the target has no support for the RAS extension.
>
> Tested the series for aarch64-none-linux-gnu with cross-compiled
> check-binutils and check-gas.
>
> Ok for trunk?
> Matthew
>
> gas/testsuite/
> 2015-12-08  Matthew Wahab  <matthew.wahab@arm.com>
>
>      * gas/aarch64/system-2.d: New.
>      * gas/aarch64/system-2.s: New.
>      * gas/aarch64/system.d: Adjust expected output for HINT 16.
>
> include/opcode/
> 2015-12-08  Matthew Wahab  <matthew.wahab@arm.com>
>
>      * aarch64.h (AARCH64_FEATURE_RAS): New.
>      (AARCH64_ARCH_V8_2): Add AARCH64_FEATURE_RAS.
>
> opcodes/
> 2015-12-08  Matthew Wahab  <matthew.wahab@arm.com>
>
>      * aarch64-asm-2.c: Regenerate.
>      * aarch64-dis-2.c: Regenerate.
>      * aarch64-tbl.h (aarch64_feature_ras): New.
>      (RAS): New.
>      (aarch64_opcode_table): Add "esb".