[dpdk-dev] [PATCH v2 1/3] eal/arm64: add 128-bit atomic compare exchange

[Eads, Gage]

Hi Phil,

> diff --git a/lib/librte_eal/common/include/generic/rte_atomic.h
> b/lib/librte_eal/common/include/generic/rte_atomic.h
> index 9958543..7dd1aa4 100644
> --- a/lib/librte_eal/common/include/generic/rte_atomic.h
> +++ b/lib/librte_eal/common/include/generic/rte_atomic.h
> @@ -1081,6 +1081,18 @@ static inline void
> rte_atomic64_clear(rte_atomic64_t *v)
> 
>  /*------------------------ 128 bit atomic operations -------------------------*/
> 
> +/**
> + * 128-bit integer structure.
> + */
> +RTE_STD_C11
> +typedef struct {
> +	RTE_STD_C11
> +	union {
> +		uint64_t val[2];
> +		__extension__ __int128 int128;
> +	};
> +} __rte_aligned(16) rte_int128_t;
> +
>  #ifdef __DOXYGEN__
> 

This change breaks 32-bit x86 builds*. A couple ways to resolve this are 1) with RTE_ARCH_* ifdefs, or 2) keep duplicate definitions of the struct in the aarch64 and x86 header files.

Thanks,
Gage

*http://mails.dpdk.org/archives/test-report/2019-June/086586.html