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reduce instructions by _mm512_maskz_set1_epi8

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add performance test for lower/upper function
This commit is contained in:
yaqi-zhao 2022-06-07 17:55:09 +08:00 committed by yaqi-zhao
parent 9f50d40915
commit d1b4185392
2 changed files with 14 additions and 4 deletions
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7
src/Functions/LowerUpperImpl.h
View File

@ -39,17 +39,16 @@ private:
{
const auto v_not_case_lower_bound = _mm512_set1_epi8(not_case_lower_bound - 1);
const auto v_not_case_upper_bound = _mm512_set1_epi8(not_case_upper_bound + 1);
const auto v_flip_case_mask = _mm512_set1_epi8(flip_case_mask);
for (; src < src_end_avx; src += byte_avx512, dst += byte_avx512)
{
const auto chars = _mm512_loadu_si512(reinterpret_cast<const __m512i *>(src));
const auto is_not_case
= _mm512_and_si512(_mm512_movm_epi8(_mm512_cmpgt_epi8_mask(chars, v_not_case_lower_bound)),
_mm512_movm_epi8(_mm512_cmplt_epi8_mask(chars, v_not_case_upper_bound)));
= _mm512_mask_cmplt_epi8_mask(_mm512_cmpgt_epi8_mask(chars, v_not_case_lower_bound),
chars, v_not_case_upper_bound);
const auto xor_mask = _mm512_and_si512(v_flip_case_mask, is_not_case);
const auto xor_mask = _mm512_maskz_set1_epi8(is_not_case, flip_case_mask);
const auto cased_chars = _mm512_xor_si512(chars, xor_mask);

11
tests/performance/lower_upper_function.xml Normal file
View File

@ -0,0 +1,11 @@
<test>
<query>select lower(randomString(16))</query>
<query>select lower(randomString(32))</query>
<query>select lower(randomString(64))</query>
<query>select lower(randomString(128))</query>
<query>select lower(randomString(256))</query>
<query>select lower(randomString(512))</query>
<query>select lower(randomString(1024))</query>
<query>select lower(randomString(832))</query>
<query>select lower(randomString(416))</query>
</test>