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| author | Clifford Wolf <clifford@clifford.at> | 2019-06-28 08:30:18 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-06-28 08:30:18 +0200 |
| commit | 1c7ce251f383a2c6734fc7ca778c5234e0c97a2a (patch) | |
| tree | bad3404f5b51aa6b1d6eeab38e3cf7a60bee3554 /tests | |
| parent | c4c39e98146b6837c35c425ef7987b2be45c0451 (diff) | |
| parent | 3225bfb98403271bbe8a56418ccd027b42eabda1 (diff) | |
| download | yosys-1c7ce251f383a2c6734fc7ca778c5234e0c97a2a.tar.gz yosys-1c7ce251f383a2c6734fc7ca778c5234e0c97a2a.tar.bz2 yosys-1c7ce251f383a2c6734fc7ca778c5234e0c97a2a.zip | |
Merge pull request #1046 from bogdanvuk/master
Optimizing DFFs whose initial value prevents their value from changing
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/opt/opt_ff_sat.v | 12 | ||||
| -rw-r--r-- | tests/opt/opt_ff_sat.ys | 5 |
2 files changed, 17 insertions, 0 deletions
diff --git a/tests/opt/opt_ff_sat.v b/tests/opt/opt_ff_sat.v new file mode 100644 index 000000000..5a0a6fe37 --- /dev/null +++ b/tests/opt/opt_ff_sat.v @@ -0,0 +1,12 @@ +module top ( + input clk, + output reg [7:0] cnt +); + initial cnt = 0; + always @(posedge clk) begin + if (cnt < 20) + cnt <= cnt + 1; + else + cnt <= 0; + end +endmodule diff --git a/tests/opt/opt_ff_sat.ys b/tests/opt/opt_ff_sat.ys new file mode 100644 index 000000000..4e7cc6ca4 --- /dev/null +++ b/tests/opt/opt_ff_sat.ys @@ -0,0 +1,5 @@ +read_verilog opt_ff_sat.v +prep -flatten +opt_rmdff -sat +synth +select -assert-count 5 t:$_DFF_P_ |