fn loadKeyWords(key: [Blake3.key_length]u8) [8]u32
fn loadKeyWords(key: [Blake3.key_length]u8) [8]u32 { var key_words: [8]u32 = undefined; for (0..8) |i| { key_words[i] = load32(key[i * 4 ..][0..4]); } return key_words; }