Changeset 621
 Timestamp:
 Mar 2, 2011, 5:53:31 PM (9 years ago)
 File:

 1 edited
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Deliverables/D2.2/8051/src/ASM/ASMCosts.ml
r619 r621 36 36 37 37 38 (* TODO: do not consider the very first instruction as ending the block since it 39 contains the cost label whose cost we are trying to compute! *) 40 let block_cost mem costs = 41 let rec aux oldpc = 42 if BitVectors.WordMap.mem oldpc costs then 0 43 else 44 let inst,pc,inst_cost = ASMInterpret.fetch mem oldpc in 45 let cost = match inst_nature oldpc inst with 46  Return > 0 47  Goto pc > aux pc 48  Branch pc2 > 49 let pc1 = 50 snd (BitVectors.half_add pc (BitVectors.vect_of_int 1 `Sixteen)) in 51 let cost1 = aux pc1 in 52 let cost2 = aux pc2 in 53 if cost1 <> cost2 then 54 warning 55 (Printf.sprintf 56 "Warning: branching to %s has cost %d; continuing has cost %d.\n" 57 "*fixme*"(*pc2*) cost2 cost1) ; 58 max cost1 cost2 59  _ > aux pc 60 in 61 cost + inst_cost 62 in 63 aux 38 let treat mem costs pc = 39 let (inst, next_pc, inst_cost) = ASMInterpret.fetch mem pc in 40 let next_pcs = match inst_nature pc inst with 41  Return > [] 42  Goto pc > [pc] 43  Branch pc2 > 44 let pc1 = 45 snd (BitVectors.half_add pc (BitVectors.vect_of_int 1 `Sixteen)) in 46 [pc1 ; pc2] 47  _ > [next_pc] in 48 (inst_cost, next_pcs) 49 50 let compare pc1 cost1 pc2 cost2 = 51 if cost1 <> cost2 then 52 warning 53 (Printf.sprintf 54 "Warning: branching to %s has cost %d, branching to %s has cost %d" 55 "*fixme*"(* pc1 *) cost1 "*fixme*" (* pc2 *) cost2) ; 56 max cost1 cost2 57 58 let block_cost mem costs pc = 59 let treat = treat mem costs in 60 let (init_cost, next_pcs) = treat pc in 61 let rec aux = function 62  [] > 0 63  [pc] when BitVectors.WordMap.mem pc costs > 0 64  [pc] > full_cost pc 65  [pc1 ; pc2] when BitVectors.WordMap.mem pc1 costs && 66 BitVectors.WordMap.mem pc2 costs > 0 67  [pc1 ; pc2] when BitVectors.WordMap.mem pc1 costs > 68 let cost2 = full_cost pc2 in 69 compare pc1 0 pc2 cost2 70  [pc1 ; pc2] when BitVectors.WordMap.mem pc2 costs > 71 let cost1 = full_cost pc1 in 72 compare pc1 cost1 pc2 0 73  [pc1 ; pc2] > 74 let cost1 = full_cost pc1 in 75 let cost2 = full_cost pc2 in 76 compare pc1 cost1 pc2 cost2 77  _ > assert false (* should be impossible: only 0, 1 or 2 following pcs *) 78 and full_cost pc = 79 let (cost, next_pcs) = treat pc in 80 cost + (aux next_pcs) in 81 init_cost + (aux next_pcs) 64 82 65 83 … … 103 121 let (lbl, cost) = first_cost_label mem costs in 104 122 let old_cost = 105 assert (CostLabel.Map.mem lbl costs_mapping) ; 106 CostLabel.Map.find lbl costs_mapping in 123 if CostLabel.Map.mem lbl costs_mapping then 124 CostLabel.Map.find lbl costs_mapping 125 else 0 in 107 126 let new_cost = old_cost + cost in 108 127 CostLabel.Map.add lbl new_cost costs_mapping
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