aps_sel
ap.aps_sel[0], ap.aps_sel[1]);
sel = aps->aps_sel[1 - rv];
sel2 = aps->aps_sel[rv];
sel = aps->aps_sel[out];
sel = aps->aps_sel[out] = !sel;
sel = aps->aps_sel[1 - out];
sel = aps->aps_sel[1 - out] = !sel;
sel = aps->aps_sel[out];
sel = aps->aps_sel[out] = !sel;
sel = aps->aps_sel[1 - out];
sel = aps->aps_sel[1 - out] = !sel;