#define P3ptr R3 #define P1ptr R4 #define P2ptr R5 #define CPOOL R7 // Temporaries in REGs #define Y2L V15 #define Y2H V16 #define T1L V17 #define T1H V18 #define T2L V19 #define T2H V20 #define T3L V21 #define T3H V22 #define T4L V23 #define T4H V24 // Temps for Sub and Add #define TT0 V11 #define TT1 V12 #define T2 V13 // p256MulAsm Parameters #define X0 V0 #define X1 V1 #define Y0 V2 #define Y1 V3 #define T0 V4 #define T1 V5 #define PL V30 #define PH V31 // Names for zero/sel selects #define X1L V0 #define...