SM2_RUN_DECODE
raw_run = SM2_RUN_DECODE(word);
entry_run = SM2_RUN_DECODE(word) << mapshift;
raw_run = SM2_RUN_DECODE(e);
raw_run = SM2_RUN_DECODE(e);
#define SM2_RUN_MAX SM2_RUN_DECODE(~0ULL)