contrib/gcc/expmed.c

2353    The "latency" field holds the minimum possible latency of the
2357    any leaf to the root.  Hence latency(a op b) is defined as zero for
2358    leaves and rtx_cost(op) + max(latency(a), latency(b)) otherwise.  */
2362   short latency;  /* The latency of the multiplication sequence.  */
2369 			     || ((X)->cost == (Y) && (X)->latency < (Y)))
2374    lower "cost".  If "cost"s are tied, the lower latency is cheaper.  */
2377 				     && (X)->latency < (Y)->latency))
2483   alg_out->cost.latency = cost_limit->latency + 1;
2486       || (cost_limit->cost == 0 && cost_limit->latency <= 0))
2497       alg_out->cost.latency = 0;
2512 	  alg_out->cost.latency = zero_cost;
2603 	  new_limit.latency = best_cost.latency - op_cost;
2607 	  alg_in->cost.latency += op_cost;
2640 	  new_limit.latency = best_cost.latency - op_cost;
2644 	  alg_in->cost.latency += op_cost;
2660 	  new_limit.latency = best_cost.latency - op_cost;
2664 	  alg_in->cost.latency += op_cost;
2699 	     Assume that the shift-and-add is "atomic" with a latency
2713 	  new_limit.latency = best_cost.latency - op_latency;
2717 	  alg_in->cost.latency += op_latency;
2718 	  if (alg_in->cost.latency < op_cost)
2719 	    alg_in->cost.latency = op_cost;
2738 	     Assume that the shift-and-sub is "atomic" with a latency
2752 	  new_limit.latency = best_cost.latency - op_latency;
2756 	  alg_in->cost.latency += op_latency;
2757 	  if (alg_in->cost.latency < op_cost)
2758 	    alg_in->cost.latency = op_cost;
2785 	  new_limit.latency = best_cost.latency - op_cost;
2789 	  alg_in->cost.latency += op_cost;
2810 	  new_limit.latency = best_cost.latency - op_cost;
2814 	  alg_in->cost.latency += op_cost;
2851       alg_hash[hash_index].cost.latency = best_cost.latency;
2903   limit.latency = mult_cost;
2914 	  limit.latency = alg->cost.latency - op_cost;
2919 	  limit.latency = mult_cost - op_cost;
2924       alg2.cost.latency += op_cost;
2934       limit.latency = alg->cost.latency - op_cost;
2939       limit.latency = mult_cost - op_cost;
2944   alg2.cost.latency += op_cost;