18 static inline u32 rotl32(u32 v, u8 n)  in rotl32()  function
37 		x[0]  += x[4];    x[12] = rotl32(x[12] ^ x[0],  16);  in chacha20_block()
38 		x[1]  += x[5];    x[13] = rotl32(x[13] ^ x[1],  16);  in chacha20_block()
39 		x[2]  += x[6];    x[14] = rotl32(x[14] ^ x[2],  16);  in chacha20_block()
40 		x[3]  += x[7];    x[15] = rotl32(x[15] ^ x[3],  16);  in chacha20_block()
42 		x[8]  += x[12];   x[4]  = rotl32(x[4]  ^ x[8],  12);  in chacha20_block()
43 		x[9]  += x[13];   x[5]  = rotl32(x[5]  ^ x[9],  12);  in chacha20_block()
44 		x[10] += x[14];   x[6]  = rotl32(x[6]  ^ x[10], 12);  in chacha20_block()
45 		x[11] += x[15];   x[7]  = rotl32(x[7]  ^ x[11], 12);  in chacha20_block()
47 		x[0]  += x[4];    x[12] = rotl32(x[12] ^ x[0],   8);  in chacha20_block()
48 		x[1]  += x[5];    x[13] = rotl32(x[13] ^ x[1],   8);  in chacha20_block()
49 		x[2]  += x[6];    x[14] = rotl32(x[14] ^ x[2],   8);  in chacha20_block()
50 		x[3]  += x[7];    x[15] = rotl32(x[15] ^ x[3],   8);  in chacha20_block()
52 		x[8]  += x[12];   x[4]  = rotl32(x[4]  ^ x[8],   7);  in chacha20_block()
53 		x[9]  += x[13];   x[5]  = rotl32(x[5]  ^ x[9],   7);  in chacha20_block()
54 		x[10] += x[14];   x[6]  = rotl32(x[6]  ^ x[10],  7);  in chacha20_block()
55 		x[11] += x[15];   x[7]  = rotl32(x[7]  ^ x[11],  7);  in chacha20_block()
57 		x[0]  += x[5];    x[15] = rotl32(x[15] ^ x[0],  16);  in chacha20_block()
58 		x[1]  += x[6];    x[12] = rotl32(x[12] ^ x[1],  16);  in chacha20_block()
59 		x[2]  += x[7];    x[13] = rotl32(x[13] ^ x[2],  16);  in chacha20_block()
60 		x[3]  += x[4];    x[14] = rotl32(x[14] ^ x[3],  16);  in chacha20_block()
62 		x[10] += x[15];   x[5]  = rotl32(x[5]  ^ x[10], 12);  in chacha20_block()
63 		x[11] += x[12];   x[6]  = rotl32(x[6]  ^ x[11], 12);  in chacha20_block()
64 		x[8]  += x[13];   x[7]  = rotl32(x[7]  ^ x[8],  12);  in chacha20_block()
65 		x[9]  += x[14];   x[4]  = rotl32(x[4]  ^ x[9],  12);  in chacha20_block()
67 		x[0]  += x[5];    x[15] = rotl32(x[15] ^ x[0],   8);  in chacha20_block()
68 		x[1]  += x[6];    x[12] = rotl32(x[12] ^ x[1],   8);  in chacha20_block()
69 		x[2]  += x[7];    x[13] = rotl32(x[13] ^ x[2],   8);  in chacha20_block()
70 		x[3]  += x[4];    x[14] = rotl32(x[14] ^ x[3],   8);  in chacha20_block()
72 		x[10] += x[15];   x[5]  = rotl32(x[5]  ^ x[10],  7);  in chacha20_block()
73 		x[11] += x[12];   x[6]  = rotl32(x[6]  ^ x[11],  7);  in chacha20_block()
74 		x[8]  += x[13];   x[7]  = rotl32(x[7]  ^ x[8],   7);  in chacha20_block()
75 		x[9]  += x[14];   x[4]  = rotl32(x[4]  ^ x[9],   7);  in chacha20_block()