Re: [AArch64] Add feature flags and command line for ARMv8.2 FP16 support.

[Matthew Wahab <matthew dot wahab at foss dot arm dot com>]

Commit: https://sourceware.org/ml/binutils-cvs/2015-11/msg00162.html

Is this also ok for the 2.26 branch?

Matthew

On 24/11/15 11:46, Matthew Wahab wrote:
> Hello,
>
> ARMv8.2 adds optional support for 16-bit operations to the FP and
> Adv.SIMD instructions. This patch adds a feature macro for this support
> with a new command line option "+fp16" to enable/disable it.
>
> Although the command line option is added as an architecture extension,
> it only affects instructions available with when +fp or +simd is
> enabled. If +fp16 is specified then it will also enable +fp.
>
> There are currently no FP16 instructions implemented in binutils, this
> patch is to enable subsequent work on supporting the extension.
>
> Tested aarch64-none-linux-gnu with cross-compiled check-binutils and
> check-gas. Checked the HTML documentaion in Firefox.
>
> Ok for trunk?
> Matthew
>
> gas/
> 2015-11-24  Matthew Wahab  <matthew.wahab@arm.com>
>
>      * config/tc-aarch64.c (aarch64_features): Add "fp16".
>      * doc/c-aarch64.texi (Architecture Extensions): Add "fp16".
>
> include/opcode/
> 2015-11-24  Matthew Wahab  <matthew.wahab@arm.com>
>
>      * aarch64.h (AARCH64_FEATURE_F16): New.
>      (AARCH64_ARCH_V8_2): Add AARCH64_FEATURE_F16 to ARMv8.2
>      features.