diff options
Diffstat (limited to 'powerpc/DuplicateOpcodeHeuristic.ml')
-rw-r--r-- | powerpc/DuplicateOpcodeHeuristic.ml | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/powerpc/DuplicateOpcodeHeuristic.ml b/powerpc/DuplicateOpcodeHeuristic.ml index 85505245..33be79e8 100644 --- a/powerpc/DuplicateOpcodeHeuristic.ml +++ b/powerpc/DuplicateOpcodeHeuristic.ml @@ -1,3 +1,27 @@ -exception HeuristicSucceeded - -let opcode_heuristic code cond ifso ifnot preferred = () +(* open Camlcoq *) +open Op +open Integers + +let opcode_heuristic code cond ifso ifnot is_loop_header = + 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 -> (match c with + | Ceq -> Some false + | Cne -> Some true + | _ -> None + ) + | Cnotcompf c -> (match c with + | Ceq -> Some true + | Cne -> Some false + | _ -> None + ) + | _ -> None |