RN_is 771 tools/chdk_dasm.c if (RN_is(13)) { /* r13, so treat as stack */ RN_is 804 tools/chdk_dasm.c if (RN_is(13) && BitsDiffer(23,24)) { RN_is 1226 tools/chdk_dasm.c if (RN_is(15) && (instr&Pbit))