On Thu, 2010-10-14 at 22:21 -0700, Paul Stewart wrote:
> On Thu, Oct 14, 2010 at 2:40 PM, Paul Stewart <pstew@xxxxxxxxxx> wrote:
> > + if (mcs_rate_table_cache[mcs] == 0) {
> > + modulation = mcs & 7;
> > + streams = (mcs >> 3) + 1;
> > + base_rate = (rate_ptr->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ?
> > + 13500000 : 6500000;
> > + gi_div = (rate_ptr->flags & IEEE80211_TX_RC_SHORT_GI) ? 9 : 10;
> > + rate_val = base_rate * mod_table[modulation] * streams / gi_div;
> > + mcs_rate_table_cache[mcs] = (rate_val + 5000) / 10000;
> > + }
> > +
> > + return mcs_rate_table_cache[mcs] * 100;
> > +}
>
> Um, that doesn't work right. The cache needs to be 4 times as big to
> account for account from 40MHZ and SHORT_GI. I'll send a revised
> version of this tomorrow.
Can't you just precalculate it anyway? Like at compile time?
johannes
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