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author | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-03-17 07:57:56 +0100 |
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committer | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-03-17 07:57:56 +0100 |
commit | 2f19071e865181d9a0c2e61f5e57731fb86e4e5d (patch) | |
tree | 07bcd02bb5c72f5287ab99963dd2184bc3f4c48a /riscV/DuplicateOpcodeHeuristic.ml | |
parent | 0ebdbc31c3e992e43d85699a039ebdd23e272df6 (diff) | |
download | compcert-kvx-2f19071e865181d9a0c2e61f5e57731fb86e4e5d.tar.gz compcert-kvx-2f19071e865181d9a0c2e61f5e57731fb86e4e5d.zip |
riscV/DuplicateOpcodeHeuristic.ml
Diffstat (limited to 'riscV/DuplicateOpcodeHeuristic.ml')
-rw-r--r-- | riscV/DuplicateOpcodeHeuristic.ml | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/riscV/DuplicateOpcodeHeuristic.ml b/riscV/DuplicateOpcodeHeuristic.ml index 85505245..2ec314c1 100644 --- a/riscV/DuplicateOpcodeHeuristic.ml +++ b/riscV/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 | 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 |