[PATCH] arm: Fix memchr() for Armv8-R

[Jeff Johnston]

Patch applied to master as there were was no objection from Richard, even
though he suggests the function
needs resyncing.  If someone wants to do the resync before end-of-year,
please get approval from Richard or
Arm team.

-- Jeff J.

On Fri, Dec 4, 2020 at 2:42 AM Sebastian Huber <
sebastian.huber@embedded-brains.de> wrote:

> The Cortex-R52 processor is an Armv8-R processor with a NEON unit.  This
> fix prevents conflicting architecture profiles A/R errors issued by the
> linker.
>
> Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
> ---
>  newlib/libc/machine/arm/memchr.S | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/newlib/libc/machine/arm/memchr.S
> b/newlib/libc/machine/arm/memchr.S
> index 7c22b117e..1a4c6512c 100644
> --- a/newlib/libc/machine/arm/memchr.S
> +++ b/newlib/libc/machine/arm/memchr.S
> @@ -79,7 +79,11 @@
>
>  @ NOTE: This ifdef MUST match the one in memchr-stub.c
>  #if defined (__ARM_NEON__) || defined (__ARM_NEON)
> +#if __ARM_ARCH >= 8 && __ARM_ARCH_PROFILE == 'R'
> +       .arch   armv8-r
> +#else
>         .arch   armv7-a
> +#endif
>         .fpu    neon
>
>
> --
> 2.26.2
>
>