150 #define F4(x, y, z) (y ^ (x | ~z))  macro
220   MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);  in MD5Transform()
221   MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);  in MD5Transform()
222   MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);  in MD5Transform()
223   MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);  in MD5Transform()
224   MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);  in MD5Transform()
225   MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);  in MD5Transform()
226   MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);  in MD5Transform()
227   MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);  in MD5Transform()
228   MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);  in MD5Transform()
229   MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);  in MD5Transform()
230   MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);  in MD5Transform()
231   MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);  in MD5Transform()
232   MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);  in MD5Transform()
233   MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);  in MD5Transform()
234   MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);  in MD5Transform()
235   MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);  in MD5Transform()