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Merge pull request #30431 from vesslanjin/remove-branchy-code-in-ColumnDecimal

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remove branch in ColumnDecimal, same as pull req #29881
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Maksim Kita 2021-10-22 13:24:44 +03:00 committed by GitHub
commit fc8a515b42
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1 changed files with 20 additions and 0 deletions
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20
src/Columns/ColumnDecimal.cpp
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@ -237,6 +237,26 @@ ColumnPtr ColumnDecimal<T>::filter(const IColumn::Filter & filt, ssize_t result_
const UInt8 * filt_end = filt_pos + size;
const T * data_pos = data.data();
#ifdef __SSE2__
static constexpr size_t SIMD_BYTES = 16;
const __m128i zero16 = _mm_setzero_si128();
const UInt8 * filt_end_sse = filt_pos + size / SIMD_BYTES * SIMD_BYTES;
while (filt_pos < filt_end_sse)
{
UInt16 mask = _mm_movemask_epi8(_mm_cmpeq_epi8(_mm_loadu_si128(reinterpret_cast<const __m128i *>(filt_pos)), zero16));
mask = ~mask;
while (mask)
{
size_t index = __builtin_ctz(mask);
res_data.push_back(*(data_pos + index));
mask = mask & (mask - 1);
}
filt_pos += SIMD_BYTES;
data_pos += SIMD_BYTES;
}
#endif
while (filt_pos < filt_end)
{
if (*filt_pos)