unresolved external symbol __mm256_setr_epi64x

Question

I have written and debugged some AVX code with g++ and now I\'m trying to get it to work with MSVC, but I keep getting

error LNK2019: unresolved exte

Answer 1

In 32-bit mode MSVC does not support

• _mm_set_epi64x
• _mm_setr_epi64x
• _mm_set1_epi64x
• _mm256_set_epi64x
• _mm256_setr_epi64x
• _mm256_set1_epi64x

In your case in 32-bit mode you can do this:

    union {
        int64_t q[4];
        int32_t r[8];
    } u;
    u.q[0] = a; u.q[1] = b; u.q[2] = c; u.q[3] = d;
    return _mm256_setr_epi32(u.r[0], u.r[1], u.r[2], u.r[3], u.r[4], u.r[5], u.r[6], u.r[7]);

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Since Visual Studio 2015 (_MSC_VER 1900) these intrinsics are supported in 32-bit mode.