<https://bugs.libre-soc.org/show_bug.cgi?id=672>

```
func count8safe(counts *[8]int, buf []uint8) {
	for i := range buf {
		for j := 0; j < 8; j++ {
			counts[j] += int(buf[i] >> j & 1)
		}
	}
}

func count16safe(counts *[16]int, buf []uint16) {
	for i := range buf {
		for j := 0; j < 16; j++ {
			counts[j] += int(buf[i] >> j & 1)
		}
	}
}
```

[[!tag svp64_cookbook ]]