66 #define GG(a, b, c, d, x, s) { \  macro
114     GG (a, b, c, d, x[ 0], S21); /* 17 */   in _md4_compress()
115     GG (d, a, b, c, x[ 4], S22); /* 18 */   in _md4_compress()
116     GG (c, d, a, b, x[ 8], S23); /* 19 */   in _md4_compress()
117     GG (b, c, d, a, x[12], S24); /* 20 */   in _md4_compress()
118     GG (a, b, c, d, x[ 1], S21); /* 21 */   in _md4_compress()
119     GG (d, a, b, c, x[ 5], S22); /* 22 */   in _md4_compress()
120     GG (c, d, a, b, x[ 9], S23); /* 23 */   in _md4_compress()
121     GG (b, c, d, a, x[13], S24); /* 24 */   in _md4_compress()
122     GG (a, b, c, d, x[ 2], S21); /* 25 */   in _md4_compress()
123     GG (d, a, b, c, x[ 6], S22); /* 26 */   in _md4_compress()
124     GG (c, d, a, b, x[10], S23); /* 27 */   in _md4_compress()
125     GG (b, c, d, a, x[14], S24); /* 28 */   in _md4_compress()
126     GG (a, b, c, d, x[ 3], S21); /* 29 */   in _md4_compress()
127     GG (d, a, b, c, x[ 7], S22); /* 30 */   in _md4_compress()
128     GG (c, d, a, b, x[11], S23); /* 31 */   in _md4_compress()
129     GG (b, c, d, a, x[15], S24); /* 32 */   in _md4_compress()