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synth_xilinx: Use opt_dff.

Browse source 
The main part is converting xilinx_dsp to recognize the new FF types
created in opt_dff instead of trying to recognize the patterns on its
own.

The fsm call has been moved upwards because the passes cannot deal with
$dffe/$sdff*, and other optimizations don't help it much anyway.
This commit is contained in:
Marcelina Kościelnicka 2020-07-22 12:27:15 +02:00
parent 4a05cad7f8
commit 8501342fc5
7 changed files with 219 additions and 887 deletions
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16
tests/arch/xilinx/fsm.ys
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@ -13,12 +13,11 @@ design -load postopt # load the post-opt design (otherwise equiv_opt loads the p
cd fsm # Constrain all select calls below inside the top module
stat
select -assert-count 1 t:BUFG
select -assert-count 4 t:FDRE
select -assert-count 1 t:FDSE
select -assert-count 1 t:LUT2
select -assert-count 3 t:LUT5
select -assert-count 6 t:FDRE
select -assert-count 1 t:LUT4
select -assert-count 4 t:LUT5
select -assert-count 1 t:LUT6
select -assert-none t:BUFG t:FDRE t:FDSE t:LUT2 t:LUT5 t:LUT6 %% t:* %D
select -assert-none t:BUFG t:FDRE t:LUT4 t:LUT5 t:LUT6 %% t:* %D
design -load orig
@ -32,7 +31,6 @@ stat
select -assert-count 1 t:BUFG
select -assert-count 6 t:FDRE
select -assert-count 1 t:LUT1
select -assert-count 3 t:LUT3
select -assert-count 6 t:LUT4
select -assert-count 6 t:MUXF5
select -assert-none t:BUFG t:FDRE t:LUT1 t:LUT3 t:LUT4 t:MUXF5 %% t:* %D
select -assert-count 8 t:LUT4
select -assert-count 5 t:MUXF5
select -assert-none t:BUFG t:FDRE t:LUT1 t:LUT4 t:MUXF5 %% t:* %D