#define V0_REGNUM 2 /* Function integer return value */
#define A0_REGNUM 4 /* Loc of first arg during a subr call */
#define T9_REGNUM 25 /* Contains address of callee in PIC */
-#define SP_REGNUM 29 /* Contains address of top of stack */
#define RA_REGNUM 31 /* Contains return address value */
#define PS_REGNUM 32 /* Contains processor status */
#define UNUSED_REGNUM 73 /* Never used, FIXME */