RTWN_RIDX_VHT_MCS_SHIFT
#define RTWN_RIDX_VHT_MCS(s, i) (RTWN_RIDX_VHT_MCS_SHIFT + ((10*(s)) + (i)))
((rate) >= RTWN_RIDX_HT_MCS_SHIFT && (rate) < RTWN_RIDX_VHT_MCS_SHIFT)
((rate) >= RTWN_RIDX_VHT_MCS_SHIFT && (rate) <= RTWN_RIDX_COUNT)
for (ridx = RTWN_RIDX_VHT_MCS_SHIFT; ridx <= max_vht_mcs; ridx++)
rxs->c_vhtnss = (rate - RTWN_RIDX_VHT_MCS_SHIFT) / 10;
rxs->c_rate = (rate - RTWN_RIDX_VHT_MCS_SHIFT) % 10;