197 #define ZADD(dw, d_off, s1w, s1_off, s2w, s2_off)   do { \  in mul20()  macro
253 	ZADD(u, 4, a, 0, a, 1);  in mul20()
254 	ZADD(u, 5, a, 2, a, 3);  in mul20()
255 	ZADD(u, 6, a, 0, a, 2);  in mul20()
256 	ZADD(u, 7, a, 1, a, 3);  in mul20()
257 	ZADD(u, 8, u, 6, u, 7);  in mul20()
260 	ZADD(v, 4, b, 0, b, 1);  in mul20()
261 	ZADD(v, 5, b, 2, b, 3);  in mul20()
262 	ZADD(v, 6, b, 0, b, 2);  in mul20()
263 	ZADD(v, 7, b, 1, b, 3);  in mul20()
264 	ZADD(v, 8, v, 6, v, 7);  in mul20()
391 #undef ZADD  in mul20()