Accessing 32bit from 64bit using ARM Neon intrinsics

Question

How to access lower 32bits or upper 32 bits from a 64 bit signed integer using ARM Neon Intrinsics? Also, I want to assign this extracted data into another 32bit variable. Is it possible?

Answer 1

static inline int32x2_t low32(int64x2_t in)
{
    int32x2_t out;

    out = vmovn_s64(in); // vqmovn for saturating

    return out;
}

static inline int32x2_t high32(int64x2_t in)
{
    int32x2_t out;

    out = vshrn_n_s64(in, 32);

    return out;
}