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Avoid _mm_cvtsi128_si64 on 32-bit builds #280

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Merged
vneiger merged 1 commit into from
Mar 8, 2026
Merged

Avoid _mm_cvtsi128_si64 on 32-bit builds #280

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6 changes: 6 additions & 0 deletions src/fglm/linalg-fglm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -211,7 +211,13 @@ uint64_t _mm256_hsum(__m256i a)
__m256i sum_lo = _mm256_add_epi64(a, a_hi);
__m128i sum_hi = _mm256_extracti128_si256(sum_lo, 1);
__m128i sum = _mm_add_epi64(_mm256_castsi256_si128(sum_lo), sum_hi);
#if defined(__x86_64__) || defined(_M_X64)
return (uint64_t) _mm_cvtsi128_si64(sum);
#else
uint64_t lo = (uint32_t) _mm_cvtsi128_si32(sum);
uint64_t hi = (uint32_t) _mm_cvtsi128_si32(_mm_srli_si128(sum, 4));
return lo | (hi << 32);
#endif
}

uint32_t _nmod32_vec_dot_split_avx2(const uint32_t * vec1, const uint32_t * vec2, int64_t len,
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