#define REG_FP 30 /* frame pointer */
#define REG_ZERO 0 /* always zero */
+#define REG_A0 8 /* define some argument registers */
+#define REG_A1 9
+#define REG_A2 10
+#define REG_A3 11
+
/* floating point registers */
/* only using the lower half of the floating registers for now */