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Date: Mon, 27 May 2024 13:00:13 +0100
From: Bruce Richardson <bruce.richardson@intel.com>
To: Tyler Retzlaff <roretzla@linux.microsoft.com>
CC: <dev@dpdk.org>, Morten =?iso-8859-1?Q?Br=F8rup?=
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Subject: Re: [PATCH 1/2] eal: provide macro for GCC builtin constant intrinsic
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On Wed, Mar 20, 2024 at 02:33:35PM -0700, Tyler Retzlaff wrote:
> MSVC does not have a __builtin_constant_p intrinsic so provide
> __rte_constant(e) that expands false for MSVC and to the intrinsic for
> GCC.
> 
> Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
> ---
>  lib/eal/include/rte_common.h | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/lib/eal/include/rte_common.h b/lib/eal/include/rte_common.h
> index 298a5c6..d520be6 100644
> --- a/lib/eal/include/rte_common.h
> +++ b/lib/eal/include/rte_common.h
> @@ -44,6 +44,12 @@
>  #endif
>  #endif
>  
> +#ifdef RTE_TOOLCHAIN_MSVC
> +#define __rte_constant(e) 0
> +#else
> +#define __rte_constant(e) __extension__(__builtin_constant_p(e))
> +#endif
> +

Acked-by: Bruce Richardson <bruce.richardson@intel.com>