22 #define PHI 0x9e3779b9UL
27 #define loadkeys(x0, x1, x2, x3, i) \  argument
28 	({ x0 = k[i]; x1 = k[i+1]; x2 = k[i+2]; x3 = k[i+3]; })
30 #define storekeys(x0, x1, x2, x3, i) \  argument
31 	({ k[i] = x0; k[i+1] = x1; k[i+2] = x2; k[i+3] = x3; })
33 #define store_and_load_keys(x0, x1, x2, x3, s, l) \  argument
34 	({ storekeys(x0, x1, x2, x3, s); loadkeys(x0, x1, x2, x3, l); })
36 #define K(x0, x1, x2, x3, i) ({				\  argument
37 	x3 ^= k[4*(i)+3];        x2 ^= k[4*(i)+2];	\
38 	x1 ^= k[4*(i)+1];        x0 ^= k[4*(i)+0];	\
41 #define LK(x0, x1, x2, x3, x4, i) ({					   \  argument
44 	x3 ^= x2;		x1 ^= x2;				   \
45 	x1 = rol32(x1, 1);	x3 ^= x4;				   \
46 	x3 = rol32(x3, 7);	x4  = x1;				   \
47 	x0 ^= x1;		x4 <<= 7;		x2 ^= x3;	   \
48 	x0 ^= x3;		x2 ^= x4;		x3 ^= k[4*i+3];	   \
50 	x0 ^= k[4*i+0];		x2 ^= k[4*i+2];				   \
53 #define KL(x0, x1, x2, x3, x4, i) ({					   \  argument
54 	x0 ^= k[4*i+0];		x1 ^= k[4*i+1];		x2 ^= k[4*i+2];	   \
55 	x3 ^= k[4*i+3];		x0 = ror32(x0, 5);	x2 = ror32(x2, 22);\
56 	x4 =  x1;		x2 ^= x3;		x0 ^= x3;	   \
58 	x2 ^= x4;		x3 = ror32(x3, 7);	x4 = x0 << 3;	   \
59 	x1 ^= x0;		x3 ^= x4;		x0 = ror32(x0, 13);\
60 	x1 ^= x2;		x3 ^= x2;		x2 = ror32(x2, 3); \
63 #define S0(x0, x1, x2, x3, x4) ({			\  argument
64 					x4  = x3;	\
65 	x3 |= x0;	x0 ^= x4;	x4 ^= x2;	\
66 	x4 = ~x4;	x3 ^= x1;	x1 &= x0;	\
67 	x1 ^= x4;	x2 ^= x0;	x0 ^= x3;	\
69 	x3 ^= x2;	x1 = ~x1;	x2 ^= x4;	\
73 #define S1(x0, x1, x2, x3, x4) ({			\  argument
75 	x1 ^= x0;	x0 ^= x3;	x3 = ~x3;	\
76 	x4 &= x1;	x0 |= x1;	x3 ^= x2;	\
77 	x0 ^= x3;	x1 ^= x3;	x3 ^= x4;	\
83 #define S2(x0, x1, x2, x3, x4) ({			\  argument
84 					x3 = ~x3;	\
86 	x0 ^= x3;	x3 |= x4;	x2 ^= x1;	\
87 	x3 ^= x1;	x1 &= x0;	x0 ^= x2;	\
88 	x2 &= x3;	x3 |= x1;	x0 = ~x0;	\
89 	x3 ^= x0;	x4 ^= x0;	x0 ^= x2;	\
93 #define S3(x0, x1, x2, x3, x4) ({			\  argument
95 	x1 ^= x3;	x3 |= x0;	x4 &= x0;	\
96 	x0 ^= x2;	x2 ^= x1;	x1 &= x3;	\
97 	x2 ^= x3;	x0 |= x4;	x4 ^= x3;	\
98 	x1 ^= x0;	x0 &= x3;	x3 &= x4;	\
99 	x3 ^= x2;	x4 |= x1;	x2 &= x1;	\
100 	x4 ^= x3;	x0 ^= x3;	x3 ^= x2;	\
103 #define S4(x0, x1, x2, x3, x4) ({			\  argument
104 					x4  = x3;	\
105 	x3 &= x0;	x0 ^= x4;			\
106 	x3 ^= x2;	x2 |= x4;	x0 ^= x1;	\
107 	x4 ^= x3;	x2 |= x0;			\
109 	x1 ^= x4;	x4 &= x2;	x2 ^= x3;	\
110 	x4 ^= x0;	x3 |= x1;	x1 = ~x1;	\
111 	x3 ^= x0;					\
114 #define S5(x0, x1, x2, x3, x4) ({			\  argument
116 	x2 ^= x1;	x3 = ~x3;	x4 ^= x0;	\
117 	x0 ^= x2;	x1 &= x4;	x4 |= x3;	\
118 	x4 ^= x0;	x0 &= x3;	x1 ^= x3;	\
119 	x3 ^= x2;	x0 ^= x1;	x2 &= x4;	\
121 	x3 ^= x2;					\
124 #define S6(x0, x1, x2, x3, x4) ({			\  argument
126 	x3 ^= x0;	x1 ^= x2;	x2 ^= x0;	\
127 	x0 &= x3;	x1 |= x3;	x4 = ~x4;	\
129 	x3 ^= x4;	x4 ^= x0;	x2 &= x0;	\
130 	x4 ^= x1;	x2 ^= x3;	x3 &= x1;	\
131 	x3 ^= x0;	x1 ^= x2;			\
134 #define S7(x0, x1, x2, x3, x4) ({			\  argument
137 	x1 ^= x3;	x3 |= x4;	x4 ^= x2;	\
138 	x2 ^= x3;	x3 ^= x0;	x0 |= x1;	\
139 	x2 &= x0;	x0 ^= x4;	x4 ^= x3;	\
140 	x3 &= x0;	x4 ^= x1;			\
141 	x2 ^= x4;	x3 ^= x1;	x4 |= x0;	\
145 #define SI0(x0, x1, x2, x3, x4) ({			\  argument
146 			x4  = x3;	x1 ^= x0;	\
147 	x3 |= x1;	x4 ^= x1;	x0 = ~x0;	\
148 	x2 ^= x3;	x3 ^= x0;	x0 &= x1;	\
149 	x0 ^= x2;	x2 &= x3;	x3 ^= x4;	\
150 	x2 ^= x3;	x1 ^= x3;	x3 &= x0;	\
151 	x1 ^= x0;	x0 ^= x2;	x4 ^= x3;	\
154 #define SI1(x0, x1, x2, x3, x4) ({			\  argument
155 	x1 ^= x3;	x4  = x0;			\
157 	x4 ^= x3;	x3 &= x1;	x1 ^= x2;	\
158 	x2 &= x4;	x4 ^= x1;	x1 |= x3;	\
159 	x3 ^= x0;	x2 ^= x0;	x0 |= x4;	\
164 #define SI2(x0, x1, x2, x3, x4) ({			\  argument
165 	x2 ^= x1;	x4  = x3;	x3 = ~x3;	\
166 	x3 |= x2;	x2 ^= x4;	x4 ^= x0;	\
167 	x3 ^= x1;	x1 |= x2;	x2 ^= x0;	\
168 	x1 ^= x4;	x4 |= x3;	x2 ^= x3;	\
170 	x2 ^= x3;	x3 ^= x4;	x4 ^= x0;	\
173 #define SI3(x0, x1, x2, x3, x4) ({			\  argument
176 	x1 ^= x0;	x0 |= x4;	x4 ^= x3;	\
177 	x0 ^= x3;	x3 |= x1;	x1 ^= x2;	\
178 	x1 ^= x3;	x0 ^= x2;	x2 ^= x3;	\
179 	x3 &= x1;	x1 ^= x0;	x0 &= x2;	\
180 	x4 ^= x3;	x3 ^= x0;	x0 ^= x1;	\
183 #define SI4(x0, x1, x2, x3, x4) ({			\  argument
184 	x2 ^= x3;	x4  = x0;	x0 &= x1;	\
185 	x0 ^= x2;	x2 |= x3;	x4 = ~x4;	\
188 	x0 ^= x3;	x3 &= x2;			\
189 	x4 ^= x3;	x3 ^= x1;	x1 &= x0;	\
190 	x4 ^= x1;	x0 ^= x3;			\
193 #define SI5(x0, x1, x2, x3, x4) ({			\  argument
195 	x2 ^= x4;	x1 ^= x3;	x3 &= x4;	\
196 	x2 ^= x3;	x3 |= x0;	x0 = ~x0;	\
197 	x3 ^= x2;	x2 |= x0;	x4 ^= x1;	\
199 	x1 ^= x3;	x0 &= x2;	x2 ^= x3;	\
200 	x0 ^= x2;	x2 ^= x4;	x4 ^= x3;	\
203 #define SI6(x0, x1, x2, x3, x4) ({			\  argument
205 	x4  = x0;	x0 &= x3;	x2 ^= x3;	\
206 	x0 ^= x2;	x3 ^= x1;	x2 |= x4;	\
207 	x2 ^= x3;	x3 &= x0;	x0 = ~x0;	\
208 	x3 ^= x1;	x1 &= x2;	x4 ^= x0;	\
209 	x3 ^= x4;	x4 ^= x2;	x0 ^= x1;	\
213 #define SI7(x0, x1, x2, x3, x4) ({			\  argument
214 	x4  = x3;	x3 &= x0;	x0 ^= x2;	\
216 	x1 |= x3;	x4 ^= x0;	x0 &= x2;	\
217 	x0 ^= x1;	x1 &= x2;	x3 ^= x2;	\
218 	x4 ^= x3;	x2 &= x3;	x3 |= x0;	\
219 	x1 ^= x4;	x3 ^= x4;	x4 &= x0;	\
238 	S1(r0, r2, r4, r1, r3); store_and_load_keys(r3, r4, r1, r0, 4, 0);  in __serpent_setkey_sbox()
239 	S2(r3, r4, r1, r0, r2); store_and_load_keys(r2, r4, r3, r0, 0, -4);  in __serpent_setkey_sbox()
265 	S2(r0, r4, r2, r1, r3); store_and_load_keys(r3, r4, r0, r1, 4, 0);  in __serpent_setkey_sbox()
266 	S3(r3, r4, r0, r1, r2); storekeys(r1, r2, r4, r3, 0);  in __serpent_setkey_sbox()
280 	for (i = 0; i < keylen; ++i)  in __serpent_setkey()
285 		k8[i++] = 0;  in __serpent_setkey()
288 	k[0] = le32_to_cpu(lk[0]);  in __serpent_setkey()
305 	keyiter(k[0], r0, r4, r2, 0, 0);  in __serpent_setkey()
314 	keyiter(k[0], r3, r2, r0, 8, 8);  in __serpent_setkey()
359 	keyiter(k[-8], r0, r4, r2, 50, 0);  in __serpent_setkey()
367 	keyiter(k[0], r3, r2, r0, 58, 8);  in __serpent_setkey()
412 	keyiter(k[-8], r0, r4, r2, 100, 0);  in __serpent_setkey()
420 	keyiter(k[0], r3, r2, r0, 108, 8);  in __serpent_setkey()
448 	return 0;  in __serpent_setkey()
469 					K(r0, r1, r2, r3, 0);  in __serpent_encrypt()
560 	SI0(r4, r1, r2, r0, r3);	K(r2, r3, r1, r4, 0);  in __serpent_decrypt()