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fix fastscan for AVX2 #13

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Merged
merged 1 commit into from
Jul 1, 2025
Merged

fix fastscan for AVX2 #13

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4 changes: 2 additions & 2 deletions rabitqlib/fastscan/fastscan.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -184,7 +184,7 @@ inline void accumulate(

for (size_t i = 0; i < code_length; i += 64) {
c = _mm256_loadu_si256((__m256i*)&codes[i]);
lut = _mm256_loadu_si256((__m256i*)&LUT[i]);
lut = _mm256_loadu_si256((__m256i*)&lut[i]);
lo = _mm256_and_si256(c, low_mask);
hi = _mm256_and_si256(_mm256_srli_epi16(c, 4), low_mask);

Expand All @@ -197,7 +197,7 @@ inline void accumulate(
accu3 = _mm256_add_epi16(accu3, _mm256_srli_epi16(res_hi, 8));

c = _mm256_loadu_si256((__m256i*)&codes[i + 32]);
lut = _mm256_loadu_si256((__m256i*)&LUT[i + 32]);
lut = _mm256_loadu_si256((__m256i*)&lut[i + 32]);
lo = _mm256_and_si256(c, low_mask);
hi = _mm256_and_si256(_mm256_srli_epi16(c, 4), low_mask);

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2 changes: 1 addition & 1 deletion rabitqlib/fastscan/highacc_fastscan.hpp
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Expand Up @@ -23,7 +23,7 @@ inline void transfer_lut_hacc(const uint16_t* lut, size_t dim, uint8_t* hc_lut)
#if defined(__AVX512F__)
constexpr size_t kRegBits = 512;
#elif defined(__AVX2__)
constexpr size_t B_regi = 256;
constexpr size_t kRegBits = 256;
#else
static_assert(false, "At least requried AVX2 for using fastscan\n");
exit(1);
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