xxh32_round
v1 = xxh32_round(v1, get_unaligned_le32(p));
v2 = xxh32_round(v2, get_unaligned_le32(p));
v3 = xxh32_round(v3, get_unaligned_le32(p));
v4 = xxh32_round(v4, get_unaligned_le32(p));