#define TAN3 0xAB0E
#define SQRT2 0x5A82
-#define MULT(c, x, n) (((c) * (x)) >> (n))
+#define MULT(c, x, n) ((unsigned)((int)((c) * (unsigned)(x)) >> (n)))
// 12b version => #define MULT(c,x, n) ((((c) >> 3) * (x)) >> ((n) - 3))
// 12b zero-testing version: