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Always use intrinsics with s390x

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This commit is contained in:
Yann Collet 2020-02-12 13:51:50 -08:00
parent 160e37d349
commit b63643ddc1
1 changed files with 8 additions and 8 deletions
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16
xxh3.h
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@ -321,19 +321,19 @@ XXH_FORCE_INLINE U64x2 XXH_vec_loadu(const void *ptr)
}
/*
* vec_mulo and vec_mule are very problematic intrinsics:
* vec_mulo and vec_mule are very problematic intrinsics on PowerPC
*
* The intrinsic weren't added until GCC 8, despite existing for a while.
* Besides, they are endian dependent, and their meaning swap depending on version.
* These intrinsics weren't added until GCC 8, despite existing for a while,
* and they are endian dependent. Also, their meaning swap depending on version.
* */
# if defined(__clang__) && __has_builtin(__builtin_altivec_vmuleuw)
# if defined(__s390x__)
/* s390x is always big endian, no issue on this platform */
# define XXH_vec_mulo vec_mulo
# define XXH_vec_mule vec_mule
# elif defined(__clang__) && __has_builtin(__builtin_altivec_vmuleuw)
/* Clang has a better way to control this, we can just use the builtin which doesn't swap. */
# define XXH_vec_mulo __builtin_altivec_vmulouw
# define XXH_vec_mule __builtin_altivec_vmuleuw
# elif defined(__s390x__) && defined(__GNUC__) && (__GNUC__ >= 8)
/* s390x is always big endian, there is no endian issue. */
# define XXH_vec_mulo vec_mulo
# define XXH_vec_mule vec_mule
# else
/* gcc needs inline assembly */
/* Adapted from https://github.com/google/highwayhash/blob/master/highwayhash/hh_vsx.h. */