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author | Marcelina KoĆcielnicka <mwk@0x04.net> | 2020-07-15 00:58:07 +0200 |
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committer | Marcelina KoĆcielnicka <mwk@0x04.net> | 2020-07-30 18:27:04 +0200 |
commit | af6623ebb86e796dfe4c122f03890e0788399af0 (patch) | |
tree | 1c29da82e43bebb99c36c5599b8d6bea1d759caf /tests/opt/opt_dff_srst.ys | |
parent | 8fd43515c5790552e686dbad09e92db2e8d291ca (diff) | |
download | yosys-af6623ebb86e796dfe4c122f03890e0788399af0.tar.gz yosys-af6623ebb86e796dfe4c122f03890e0788399af0.tar.bz2 yosys-af6623ebb86e796dfe4c122f03890e0788399af0.zip |
Add opt_dff pass.
Diffstat (limited to 'tests/opt/opt_dff_srst.ys')
-rw-r--r-- | tests/opt/opt_dff_srst.ys | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/tests/opt/opt_dff_srst.ys b/tests/opt/opt_dff_srst.ys new file mode 100644 index 000000000..4a77de0b8 --- /dev/null +++ b/tests/opt/opt_dff_srst.ys @@ -0,0 +1,113 @@ +### Always-active SRST removal. + +read_verilog -icells <<EOT + +module top(...); + +input CLK; +input [1:0] D; +(* init=12'h555 *) +output [11:0] Q; +input SRST; +input EN; + +$sdff #(.CLK_POLARITY(1'b1), .SRST_POLARITY(1'b1), .SRST_VALUE(2'h2), .WIDTH(2)) ff0 (.CLK(CLK), .SRST(1'b1), .D(D), .Q(Q[1:0])); +$sdffe #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b1), .SRST_POLARITY(1'b0), .SRST_VALUE(2'h2), .WIDTH(2)) ff1 (.CLK(CLK), .SRST(1'b0), .EN(EN), .D(D), .Q(Q[3:2])); +$sdffce #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b1), .SRST_POLARITY(1'b0), .SRST_VALUE(2'h2), .WIDTH(2)) ff2 (.CLK(CLK), .SRST(1'b0), .EN(EN), .D(D), .Q(Q[5:4])); +$sdff #(.CLK_POLARITY(1'b1), .SRST_POLARITY(1'b1), .SRST_VALUE(2'h2), .WIDTH(2)) ff3 (.CLK(CLK), .SRST(1'bx), .D(D), .Q(Q[7:6])); +$sdffe #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b1), .SRST_POLARITY(1'b0), .SRST_VALUE(2'h2), .WIDTH(2)) ff4 (.CLK(CLK), .SRST(1'bx), .EN(EN), .D(D), .Q(Q[9:8])); +$sdffce #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b1), .SRST_POLARITY(1'b0), .SRST_VALUE(2'h2), .WIDTH(2)) ff5 (.CLK(CLK), .SRST(1'bx), .EN(EN), .D(D), .Q(Q[11:10])); + + +endmodule + +EOT + +design -save orig + +equiv_opt -undef -assert -multiclock opt_dff +design -load postopt +select -assert-count 0 t:$sdff +select -assert-count 0 t:$sdffe +select -assert-count 0 t:$sdffce +select -assert-count 4 t:$dff +select -assert-count 2 t:$dffe + +design -load orig + +equiv_opt -undef -assert -multiclock opt_dff -keepdc +design -load postopt +select -assert-count 1 t:$sdff +select -assert-count 1 t:$sdffe +select -assert-count 1 t:$sdffce +select -assert-count 2 t:$dff +select -assert-count 1 t:$dffe + +design -load orig +simplemap + +equiv_opt -undef -assert -multiclock opt_dff +design -load postopt +select -assert-none t:$_SDFF_???_ +select -assert-none t:$_SDFFE_????_ +select -assert-none t:$_SDFFCE_????_ +select -assert-count 8 t:$_DFF_?_ +select -assert-count 4 t:$_DFFE_??_ + +design -load orig +simplemap + +equiv_opt -undef -assert -multiclock opt_dff -keepdc +design -load postopt +select -assert-count 2 t:$_SDFF_???_ +select -assert-count 2 t:$_SDFFE_????_ +select -assert-count 2 t:$_SDFFCE_????_ +select -assert-count 4 t:$_DFF_?_ +select -assert-count 2 t:$_DFFE_??_ + +design -reset + + +### Never-active SRST removal. + +read_verilog -icells <<EOT + +module top(...); + +input CLK; +input [1:0] D; +output [5:0] Q; +input SRST; +input EN; + +$sdff #(.CLK_POLARITY(1'b1), .SRST_POLARITY(1'b1), .SRST_VALUE(2'h2), .WIDTH(2)) ff0 (.CLK(CLK), .SRST(1'b0), .D(D), .Q(Q[1:0])); +$sdffe #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b1), .SRST_POLARITY(1'b0), .SRST_VALUE(2'h2), .WIDTH(2)) ff1 (.CLK(CLK), .SRST(1'b1), .EN(EN), .D(D), .Q(Q[3:2])); +$sdffce #(.CLK_POLARITY(1'b1), .EN_POLARITY(1'b1), .SRST_POLARITY(1'b0), .SRST_VALUE(2'h2), .WIDTH(2)) ff2 (.CLK(CLK), .SRST(1'b1), .EN(EN), .D(D), .Q(Q[5:4])); + +endmodule + +EOT + +design -save orig + +equiv_opt -undef -assert -multiclock opt_dff +design -load postopt +select -assert-none t:$sdff +select -assert-none t:$sdffe +select -assert-none t:$sdffce +select -assert-count 1 t:$dff +select -assert-count 2 t:$dffe + +design -load orig +simplemap + +equiv_opt -undef -assert -multiclock opt_dff +design -load postopt +select -assert-none t:$_SDFF_???_ +select -assert-none t:$_SDFFE_????_ +select -assert-none t:$_SDFFCE_????_ +select -assert-count 2 t:$_DFF_P_ +select -assert-count 4 t:$_DFFE_PP_ + +design -reset + |