SDC: Add test for set_false_path
Signed-off-by: Tomasz Michalak <tmichalak@antmicro.com>
diff --git a/sdc-plugin/tests/Makefile b/sdc-plugin/tests/Makefile
index d19f19d..86292f5 100644
--- a/sdc-plugin/tests/Makefile
+++ b/sdc-plugin/tests/Makefile
@@ -1,4 +1,14 @@
-TESTS = counter counter2 pll pll_div pll_fbout_phase pll_approx_equal
+# counter, counter2, pll - test buffer and clock divider propagation
+# set_false_path - test the set_false_path command
+
+TESTS = counter \
+ counter2 \
+ pll \
+ pll_div \
+ pll_fbout_phase \
+ pll_approx_equal \
+ set_false_path
+
.PHONY: $(TESTS)
counter_verify = $(call compare,counter,sdc) && $(call compare,counter,txt)
@@ -7,6 +17,7 @@
pll_div_verify = $(call compare,pll_div,sdc)
pll_fbout_phase_verify = $(call compare,pll_fbout_phase,sdc)
pll_approx_equal_verify = $(call compare,pll_approx_equal,sdc)
+set_false_path_verify = $(call compare,set_false_path,sdc)
all: $(TESTS)
compare = diff $(1)/$(1).golden.$(2) $(1)/$(1).$(2)
diff --git a/sdc-plugin/tests/set_false_path/set_false_path.golden.sdc b/sdc-plugin/tests/set_false_path/set_false_path.golden.sdc
new file mode 100644
index 0000000..4e75de4
--- /dev/null
+++ b/sdc-plugin/tests/set_false_path/set_false_path.golden.sdc
@@ -0,0 +1,3 @@
+set_false_path -to inter_wire
+set_false_path -from clk
+set_false_path -from clk -to bottom_inst.I
diff --git a/sdc-plugin/tests/set_false_path/set_false_path.tcl b/sdc-plugin/tests/set_false_path/set_false_path.tcl
new file mode 100644
index 0000000..39a51c0
--- /dev/null
+++ b/sdc-plugin/tests/set_false_path/set_false_path.tcl
@@ -0,0 +1,19 @@
+yosys -import
+plugin -i sdc
+#Import the commands from the plugins to the tcl interpreter
+yosys -import
+
+read_verilog set_false_path.v
+# Some of symbiflow expects eblifs with only one module.
+synth_xilinx -vpr -flatten -abc9 -nosrl -noclkbuf -nodsp
+
+# -to inter_wire net
+set_false_path -to inter_wire
+
+# -from clk net (quiet)
+set_false_path -quiet -from clk
+
+# -from clk to bottom_inst/I
+set_false_path -from clk -to bottom_inst.I
+
+write_sdc set_false_path.sdc
diff --git a/sdc-plugin/tests/set_false_path/set_false_path.v b/sdc-plugin/tests/set_false_path/set_false_path.v
new file mode 100644
index 0000000..d40055b
--- /dev/null
+++ b/sdc-plugin/tests/set_false_path/set_false_path.v
@@ -0,0 +1,75 @@
+module top (
+ (* async_reg = "true", mr_ff = "true", dont_touch = "true" *) input clk,
+ output [3:0] led,
+ inout out_a,
+ output [1:0] out_b,
+ output signal_p,
+ output signal_n
+);
+
+ wire LD6, LD7, LD8, LD9;
+ wire inter_wire, inter_wire_2;
+ localparam BITS = 1;
+ localparam LOG2DELAY = 25;
+
+ reg [BITS+LOG2DELAY-1:0] counter = 0;
+
+ always @(posedge clk) begin
+ counter <= counter + 1;
+ end
+ assign led[1] = inter_wire;
+ assign inter_wire = inter_wire_2;
+ assign {LD9, LD8, LD7, LD6} = counter >> LOG2DELAY;
+ OBUFTDS OBUFTDS_2(
+ .I(LD6),
+ .O(signal_p),
+ .OB(signal_n),
+ .T(1'b1)
+ );
+ OBUF #(
+ .IOSTANDARD("LVCMOS33"),
+ .SLEW("SLOW")
+ ) OBUF_6(.I(LD6), .O(led[0]));
+ OBUF #(
+ .IOSTANDARD("LVCMOS33"),
+ .SLEW("SLOW")
+ ) OBUF_7(.I(LD7), .O(inter_wire_2));
+ OBUF #(
+ .IOSTANDARD("LVCMOS33"),
+ .SLEW("SLOW")
+ ) OBUF_OUT(.I(LD7), .O(out_a));
+ bottom bottom_inst(.I(LD8), .O(led[2]), .OB(out_b));
+ bottom_intermediate bottom_intermediate_inst(.I(LD9), .O(led[3]));
+endmodule
+
+module bottom_intermediate (
+ input I,
+ output O
+);
+ wire bottom_intermediate_wire;
+ assign O = bottom_intermediate_wire;
+ OBUF #(
+ .IOSTANDARD("LVCMOS33"),
+ .SLEW("SLOW")
+ ) OBUF_8(.I(I), .O(bottom_intermediate_wire));
+endmodule
+
+module bottom (
+ input I,
+ output [1:0] OB,
+ output O
+);
+ OBUF #(
+ .IOSTANDARD("LVCMOS33"),
+ .SLEW("SLOW")
+ ) OBUF_9(.I(I), .O(O));
+ OBUF #(
+ .IOSTANDARD("LVCMOS33"),
+ .SLEW("SLOW")
+ ) OBUF_10(.I(I), .O(OB[0]));
+ OBUF #(
+ .IOSTANDARD("LVCMOS33"),
+ .SLEW("SLOW")
+ ) OBUF_11(.I(I), .O(OB[1]));
+endmodule
+
