extern Register Exec(const Register & a, const Register & b, Opcode op, Rmode rmode = EVEN); // operate with registers
extern float Exec(float a, float b, Opcode op, Rmode rmode = EVEN); //converts floats into registers and back
extern Register Exec(const Register & a, const Register & b, Opcode op, Rmode rmode = EVEN); // operate with registers
extern float Exec(float a, float b, Opcode op, Rmode rmode = EVEN); //converts floats into registers and back