5 #define F1(x, y, z)	(z ^ (x & (y ^ z)))  macro
6 #define F2(x, y, z)	F1(z, x, y)
22 	MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);  in md5_transform()
23 	MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);  in md5_transform()
24 	MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);  in md5_transform()
25 	MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);  in md5_transform()
26 	MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);  in md5_transform()
27 	MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);  in md5_transform()
28 	MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);  in md5_transform()
29 	MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);  in md5_transform()
30 	MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);  in md5_transform()
31 	MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);  in md5_transform()
32 	MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);  in md5_transform()
33 	MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);  in md5_transform()
34 	MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);  in md5_transform()
35 	MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);  in md5_transform()
36 	MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);  in md5_transform()
37 	MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);  in md5_transform()