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| author | Tristan Gingold <tgingold@free.fr> | 2023-04-16 18:14:07 +0200 |
|---|---|---|
| committer | Tristan Gingold <tgingold@free.fr> | 2023-04-16 18:14:07 +0200 |
| commit | 595f04c35ceacb40edfed4cf0c443be166cb8b91 (patch) | |
| tree | adf5bb52d4528980bf2b6fb0aae5b7c0401c2c55 /src/synth/netlists-memories.adb | |
| parent | 7b827ca4172f9b40f4a473a223bc8f3486626994 (diff) | |
| download | ghdl-595f04c35ceacb40edfed4cf0c443be166cb8b91.tar.gz ghdl-595f04c35ceacb40edfed4cf0c443be166cb8b91.tar.bz2 ghdl-595f04c35ceacb40edfed4cf0c443be166cb8b91.zip | |
netlists-memories: add comments
Diffstat (limited to 'src/synth/netlists-memories.adb')
| -rw-r--r-- | src/synth/netlists-memories.adb | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/synth/netlists-memories.adb b/src/synth/netlists-memories.adb index 84267ea44..1502b6f40 100644 --- a/src/synth/netlists-memories.adb +++ b/src/synth/netlists-memories.adb @@ -452,10 +452,13 @@ package body Netlists.Memories is -- The output of the mux must be connected to one input. return False; end if; + + -- Check if the mux is before a dff. Dff_Inst := Get_Input_Parent (Inp); if Get_Id (Dff_Inst) /= Id_Dff then return False; end if; + Dff_Out := Get_Output (Dff_Inst, 0); if Mux_Inp = Get_Input (Mux_Inst, 1) then @@ -480,8 +483,9 @@ package body Netlists.Memories is begin Inp := Get_First_Sink (Val); if Get_Next_Sink (Inp) = No_Input then - -- There is a single input. + -- The output of INST (a Dyn_Extract) goes to only one gate. Iinst := Get_Input_Parent (Inp); + if Get_Id (Iinst) = Id_Dff then -- The output of the dyn_extract is directly connected to a dff. -- So this is a synchronous read without enable. |