Hi all, This patch adds initial -mcpu support for the Arm Cortex-M55 CPU. This CPU is an Armv8.1-M Mainline CPU supporting MVE. An option to disable floating-point (and MVE) is provided with the +nofp. For GCC 11 I'd like to add further fine-grained options to enable integer-only MVE but that needs a bit more elaborate surgery in arm-cpus.in that I don't want to do in GCC 10 at this stage.
As this CPU is not supported in gas and I don't want to couple GCC 10 to the
very
latest binutils anyway, this CPU emits the cpu string in the assembly file as a
build attribute
rather than a .cpu directive, thus sparing us the need to support .cpu
cortex-m55 in gas.
The .cpu directive in gas isn't used for anything besides setting the
Tag_CPU_name
build attribute anyway (which itself is not used by any tools I'm aware of).
All the architecture information used for target detection is already emitted
using .arch_extension
directives and similar.
Bootstrapped and tested on arm-none-linux-gnueabihf. Also tested on
arm-none-eabi.
Committing to trunk.
Thanks,
Kyrill
2020-04-22 Kyrylo Tkachov <kyrylo.tkac...@arm.com>
Andre Vieira <andre.simoesdiasvie...@arm.com>
Mihail Ionescu <mihail.ione...@arm.com>
* config/arm/arm.c (arm_file_start): Handle isa_bit_quirk_no_asmcpu.
* config/arm/arm-cpus.in (quirk_no_asmcpu): Define.
(ALL_QUIRKS): Add quirk_no_asmcpu.
(cortex-m55): Define new cpu.
* config/arm/arm-tables.opt: Regenerate.
* config/arm/arm-tune.md: Likewise.
* doc/invoke.texi (Arm Options): Document -mcpu=cortex-m55.
m55-kyrill.patch
Description: m55-kyrill.patch
