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|
(* open Camlcoq *)
open Op
open Integers
exception HeuristicSucceeded
let opcode_heuristic code cond ifso ifnot preferred =
let decision = match cond with
| Ccompimm (c, n) | Ccompuimm (c, n) -> if n == Integers.Int.zero then (match c with
| Clt | Cle -> Some false
| Cgt | Cge -> Some true
| _ -> None
) else None
| Ccomplimm (c, n) | Ccompluimm (c, n) -> if n == Integers.Int64.zero then (match c with
| Clt | Cle -> Some false
| Cgt | Cge -> Some true
| _ -> None
) else None
| Ccompf c | Ccompfs c -> (match c with
| Ceq -> Some false
| Cne -> Some true
| _ -> None
)
| Cnotcompf c | Cnotcompfs c -> (match c with
| Ceq -> Some true
| Cne -> Some false
| _ -> None
)
| _ -> None
in match decision with
| Some b -> (preferred := b; raise HeuristicSucceeded)
| None -> ()
|
