[dpdk-dev] [PATCH] Implement memcmp using AVX/SSE instructio
Pawel Wodkowski
pawelx.wodkowski at intel.com
Thu Apr 23 09:24:52 CEST 2015
On 2015-04-22 17:33, Ravi Kerur wrote:
> +/**
> + * Compare bytes between two locations. The locations must not overlap.
> + *
> + * @note This is implemented as a macro, so it's address should not be taken
> + * and care is needed as parameter expressions may be evaluated multiple times.
> + *
> + * @param src_1
> + * Pointer to the first source of the data.
> + * @param src_2
> + * Pointer to the second source of the data.
> + * @param n
> + * Number of bytes to compare.
> + * @return
> + * true if equal otherwise false.
> + */
> +static inline bool
> +rte_memcmp(const void *src_1, const void *src,
> + size_t n) __attribute__((always_inline));
You are exposing this as public API, so I think you should follow
description bellow or not call this _memcmp_
int memcmp(const void *s1, const void *s2, size_t n);
The memcmp() function returns an integer less than, equal to, or
greater than
zero if the first n bytes of s1 is found, respectively, to
be less than, to
match, or be greater than the first n bytes of s2.
--
Pawel
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