lz_rd_decode_tree
unsigned symbol = lz_rd_decode_tree(rd, bm, num_bits);
return lz_rd_decode_tree(rd, lm->bm_low[pos_state], LOW_BITS);
lz_rd_decode_tree(rd, lm->bm_mid[pos_state], MID_BITS);
lz_rd_decode_tree(rd, lm->bm_high, HIGH_BITS);
lz_put(lz, lz_rd_decode_tree(rd, bm, 8));
rep[0] = lz_rd_decode_tree(rd, bm_dis_slot[len_state],