REGARG_FIRSTGPR    94 lj_target_arm.h #define REGARG_FIRSTGPR		RID_R0
REGARG_FIRSTGPR    70 lj_target_arm64.h #define REGARG_FIRSTGPR		RID_X0
REGARG_FIRSTGPR   115 lj_target_mips.h #define REGARG_FIRSTGPR		RID_R4
REGARG_FIRSTGPR    70 lj_target_ppc.h #define REGARG_FIRSTGPR		RID_R3