-#define ROUND1(a,b,c,d,k,s) a = lshift(a + F(b,c,d) + X[k], s)
-#define ROUND2(a,b,c,d,k,s) a = lshift(a + G(b,c,d) + X[k] + 0x5A827999,s)
-#define ROUND3(a,b,c,d,k,s) a = lshift(a + H(b,c,d) + X[k] + 0x6ED9EBA1,s)
+#define ROUND1(a,b,c,d,k,s) a = lshift((uint32)(a + F(b,c,d) + X[k]), s)
+#define ROUND2(a,b,c,d,k,s) a = lshift((uint32)(a + G(b,c,d) + X[k] + 0x5A827999),s)
+#define ROUND3(a,b,c,d,k,s) a = lshift((uint32)(a + H(b,c,d) + X[k] + 0x6ED9EBA1),s)