diff options
Diffstat (limited to 'src/synth/synth-environment.adb')
| -rw-r--r-- | src/synth/synth-environment.adb | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/synth/synth-environment.adb b/src/synth/synth-environment.adb index 654d74ad2..8b3753aaf 100644 --- a/src/synth/synth-environment.adb +++ b/src/synth/synth-environment.adb @@ -1323,6 +1323,28 @@ package body Synth.Environment is end loop; end Merge_Partial_Assigns; + -- Sub-routine of Merge_Assigns when the net is a dyn_insert + -- Try to transform it to a dyn_insert_en + function Merge_Dyn_Insert (Ctxt : Builders.Context_Acc; + Sel : Net; + N1_Inst : Instance; + N0 : Net) return Net + is + V : Net; + New_Inst : Instance; + begin + -- TODO: handle a serie of dyn_insert + -- TODO: also handle dyn_insert_en + -- TODO: negative SEL ? + V := Get_Input_Net (N1_Inst, 0); + if Same_Net (V, N0) then + New_Inst := Add_Enable_To_Dyn_Insert (Ctxt, N1_Inst, Sel); + return Get_Output (New_Inst, 0); + else + return Build_Mux2 (Ctxt, Sel, N0, Get_Output (N1_Inst, 0)); + end if; + end Merge_Dyn_Insert; + procedure Merge_Assigns (Ctxt : Builders.Context_Acc; Wid : Wire_Id; Sel : Net; @@ -1404,6 +1426,11 @@ package body Synth.Environment is (Ctxt, Res, N (0), Get_Driver (Get_Mux2_I1 (N1_Inst))); end if; end; + elsif not Flags.Flag_Debug_Nomemory1 + and then Get_Id (N1_Inst) = Id_Dyn_Insert + and then not Is_Connected (N (1)) + then + Res := Merge_Dyn_Insert (Ctxt, Sel, N1_Inst, N (0)); elsif N (0) = N (1) then -- Minor optimization: no need to add a mux if both sides are -- equal. But this is important for the control wires. |