mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2026-07-10 17:26:17 +00:00
Code Activity

Make opt_dff -sat conflict with -keepdc.

Browse source
This commit is contained in:
nella 2026-07-06 13:47:10 +02:00
parent 46cbeab720
commit 0e56ca02ed
2 changed files with 44 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

33
tests/opt/opt_dff_eqbits.ys
View file

@ -54,3 +54,36 @@ design -copy-from gate -as gate test_case
equiv_make gold gate equiv
equiv_induct equiv
equiv_status -assert
# verify keepdc exclusivity
design -reset
read_verilog -sv <<EOT
module test_case(input clk, input d, output reg a, output reg b);
initial a = 1'b0;
initial b = 1'b0;
always @(posedge clk) a <= d;
always @(posedge clk) b <= d | 1'bx;
endmodule
EOT
hierarchy -top test_case
proc
techmap
opt_dff -sat
opt_clean -purge
select -assert-count 1 t:$_DFF_P_
design -reset
read_verilog -sv <<EOT
module test_case(input clk, input d, output reg a, output reg b);
initial a = 1'b0;
initial b = 1'b0;
always @(posedge clk) a <= d;
always @(posedge clk) b <= d | 1'bx;
endmodule
EOT
hierarchy -top test_case
proc
techmap
logger -expect error "The -sat and -keepdc options are mutually exclusive." 1
opt_dff -sat -keepdc