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favor SSE2 auto-vectorization

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changed XXH3_hashLong_internal_loop() directive to `static`
This commit is contained in:
Yann Collet 2019-06-13 14:27:19 -07:00
parent ac897bec29
commit 1e4aca9718
1 changed files with 15 additions and 5 deletions
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20
xxh3.h
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@ -685,8 +685,15 @@ XXH3_accumulate(U64* restrict acc, const void* restrict data, const void* restri
}
}
XXH_FORCE_INLINE void
XXH3_hashLong_internal_loop(U64* restrict acc, const void* restrict data, size_t len, const void* restrict secret, size_t secretSize)
/* note : using XXH_FORCE_INLINE here makes clang auto-vectorize well in AVX2 mode,
* but unfortunately, clang would no longer auto-vectorize SSE2 properly.
* Since SSE2 has higher priority than AVX2, prefer `static`,
* which makes clang auto-vectorize SSE2 very efficiently.
*/
static void
XXH3_hashLong_internal_loop( U64* restrict acc,
const void* restrict data, size_t len,
const void* restrict secret, size_t secretSize)
{
size_t const nb_rounds = (secretSize - STRIPE_LEN) / XXH_SECRET_CONSUME_RATE;
size_t const block_len = STRIPE_LEN * nb_rounds;
@ -714,7 +721,8 @@ XXH3_hashLong_internal_loop(U64* restrict acc, const void* restrict data, size_t
} }
}
XXH_FORCE_INLINE U64 XXH3_mix2Accs(const U64* restrict acc, const void* restrict key)
XXH_FORCE_INLINE U64
XXH3_mix2Accs(const U64* restrict acc, const void* restrict key)
{
const U64* const key64 = (const U64*)key;
return XXH3_mul128_fold64(
@ -722,7 +730,8 @@ XXH_FORCE_INLINE U64 XXH3_mix2Accs(const U64* restrict acc, const void* restrict
acc[1] ^ XXH_readLE64(key64+1) );
}
static XXH64_hash_t XXH3_mergeAccs(const U64* restrict acc, const void* restrict key, U64 start)
static XXH64_hash_t
XXH3_mergeAccs(const U64* restrict acc, const void* restrict key, U64 start)
{
U64 result64 = start;
@ -735,7 +744,8 @@ static XXH64_hash_t XXH3_mergeAccs(const U64* restrict acc, const void* restrict
}
XXH_FORCE_INLINE XXH64_hash_t
XXH3_hashLong_internal(const void* restrict data, size_t len, const void* restrict secret, size_t secretSize)
XXH3_hashLong_internal(const void* restrict data, size_t len,
const void* restrict secret, size_t secretSize)
{
XXH_ALIGN(XXH_ACC_ALIGN) U64 acc[ACC_NB] = { PRIME32_3, PRIME64_1, PRIME64_2, PRIME64_3, PRIME64_4, PRIME32_2, PRIME64_5, PRIME32_1 };