mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2026-07-09 08:50:18 +00:00
Code Activity

Merge pull request #6012 from YosysHQ/nella/fix-opt-reduce

Browse source 
`opt_reduce`: restore pmux b-slice == a elim
This commit is contained in:
nella 2026-07-08 13:36:04 +00:00 • committed by GitHub
commit 8dc32cbf4e
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
2 changed files with 52 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

50
tests/opt/opt_reduce_pmux.ys Normal file
View file

@ -0,0 +1,50 @@
read_rtlil << EOT
module \top
wire width 4 input 0 \A
wire width 4 input 1 \C
wire width 2 input 2 \S
wire width 4 output 3 \Y
cell $pmux $0
parameter \WIDTH 4
parameter \S_WIDTH 2
connect \A \A
connect \B { \C \A }
connect \S \S
connect \Y \Y
end
end
EOT
equiv_opt -assert opt_reduce
opt_reduce
select -assert-count 0 t:$pmux
select -assert-count 1 t:$mux
design -reset
read_rtlil << EOT
module \top
wire width 4 input 0 \A
wire width 2 input 1 \S
wire width 4 output 2 \Y
cell $pmux $0
parameter \WIDTH 4
parameter \S_WIDTH 2
connect \A \A
connect \B { \A \A }
connect \S \S
connect \Y \Y
end
end
EOT
equiv_opt -assert opt_reduce
opt_reduce
select -assert-count 0 t:$pmux
select -assert-count 0 t:$mux