_md5_HH
_md5_HH (a, b, c, d, x[ 5], _md5_S31, 0xfffa3942); /* 33 */
_md5_HH (d, a, b, c, x[ 8], _md5_S32, 0x8771f681); /* 34 */
_md5_HH (c, d, a, b, x[11], _md5_S33, 0x6d9d6122); /* 35 */
_md5_HH (b, c, d, a, x[14], _md5_S34, 0xfde5380c); /* 36 */
_md5_HH (a, b, c, d, x[ 1], _md5_S31, 0xa4beea44); /* 37 */
_md5_HH (d, a, b, c, x[ 4], _md5_S32, 0x4bdecfa9); /* 38 */
_md5_HH (c, d, a, b, x[ 7], _md5_S33, 0xf6bb4b60); /* 39 */
_md5_HH (b, c, d, a, x[10], _md5_S34, 0xbebfbc70); /* 40 */
_md5_HH (a, b, c, d, x[13], _md5_S31, 0x289b7ec6); /* 41 */
_md5_HH (d, a, b, c, x[ 0], _md5_S32, 0xeaa127fa); /* 42 */
_md5_HH (c, d, a, b, x[ 3], _md5_S33, 0xd4ef3085); /* 43 */
_md5_HH (b, c, d, a, x[ 6], _md5_S34, 0x4881d05); /* 44 */
_md5_HH (a, b, c, d, x[ 9], _md5_S31, 0xd9d4d039); /* 45 */
_md5_HH (d, a, b, c, x[12], _md5_S32, 0xe6db99e5); /* 46 */
_md5_HH (c, d, a, b, x[15], _md5_S33, 0x1fa27cf8); /* 47 */
_md5_HH (b, c, d, a, x[ 2], _md5_S34, 0xc4ac5665); /* 48 */