fewer intrinsics in _mm_movemask_ps

[shinjiogaki]

No description provided.

[aqrit]

an alternative is to extract bits with using umulh:

uint64_t x = vget_lane_s64(vreinterpret_s64_s16(vqmovn_s32(vreinterpretq_s32_m128i(a))),0);
const uint64_t mask = 0x8000800080008000ULL;
const uint64_t magic = 0x0002000400080010ULL;
return (uint8_t)(((__uint128_t)(x & mask) * (__uint128_t)magic) >> 64);

I don't know which is faster.

[howjmay]

@shinjiogaki are you interested in giving a try to see whether this bring performance enhancement?