ITM_SPEC_3_64_BIG_ENDIAN
itm_header->spec[3] = ITM_SPEC_3_64_BIG_ENDIAN;
(itm_hdr->spec[3] != ITM_SPEC_3_64_BIG_ENDIAN))) {
(hdr->spec[3] != ITM_SPEC_3_64_BIG_ENDIAN)) ||