-unsigned long __fastcall__ cc65_umul16x16r32 (unsigned rhs, unsigned lhs);
+unsigned __fastcall__ cc65_umul8x8r16 (unsigned char lhs, unsigned char rhs);
+/* Multiplicate two unsigned 8 bit to yield an unsigned 16 bit result */
+
+int __fastcall__ cc65_imul8x8r16 (signed char lhs, signed char rhs);
+/* Multiplicate two signed 8 bit to yield an signed 16 bit result */
+
+unsigned long __fastcall__ cc65_umul16x16r32 (unsigned lhs, unsigned rhs);
/* Multiplicate two unsigned 16 bit to yield an unsigned 32 bit result */
+long __fastcall__ cc65_imul16x16r32 (int lhs, int rhs);
+/* Multiplicate two signed 16 bit to yield a signed 32 bit result */
+
int __fastcall__ cc65_sin (unsigned x);
/* Return the sine of the argument, which must be in range 0..360. The result
* is in 8.8 fixed point format, which means that 1.0 = $100 and -1.0 = $FF00.