214 #define F2(x, y, z) F1(z, x, y)  macro
253     MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);  in MD5Transform()
254     MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);  in MD5Transform()
255     MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);  in MD5Transform()
256     MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);  in MD5Transform()
257     MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);  in MD5Transform()
258     MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);  in MD5Transform()
259     MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);  in MD5Transform()
260     MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);  in MD5Transform()
261     MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);  in MD5Transform()
262     MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);  in MD5Transform()
263     MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);  in MD5Transform()
264     MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);  in MD5Transform()
265     MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);  in MD5Transform()
266     MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);  in MD5Transform()
267     MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);  in MD5Transform()
268     MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);  in MD5Transform()