RN                 64 ext/pcre/pcrelib/sljit/sljitNativeARM_32.c #define RN(rn) (reg_map[rn] << 16)
RN                 53 ext/pcre/pcrelib/sljit/sljitNativeARM_64.c #define RN(rn) (reg_map[rn] << 5)