1 1 9.2.3.2 Register Names 1 ...................... 1 1 The 32 integer registers are referred to as '$N' or '$rN'. In addition, 1 registers 15, 28, 29, and 30 may be referred to by the symbols '$fp', 1 '$at', '$gp', and '$sp' respectively. 1 1 The 32 floating-point registers are referred to as '$fN'. 1