ROTL32            451 ext/hash/hash_md.c #define MD4_R1(a,b,c,d,k,s)		a = ROTL32(s, a + MD4_F(b,c,d) + x[k])
ROTL32            452 ext/hash/hash_md.c #define MD4_R2(a,b,c,d,k,s)		a = ROTL32(s, a + MD4_G(b,c,d) + x[k] + 0x5A827999)
ROTL32            453 ext/hash/hash_md.c #define MD4_R3(a,b,c,d,k,s)		a = ROTL32(s, a + MD4_H(b,c,d) + x[k] + 0x6ED9EBA1)