From 91b46ed81670de621af2d88a4da32005a17a2f16 Mon Sep 17 00:00:00 2001 From: David Shah Date: Fri, 30 Aug 2019 13:25:55 +0100 Subject: [PATCH] ecp5: Add simulation equivalence check for Diamond FF implementations Signed-off-by: David Shah --- techlibs/ecp5/cells_sim.v | 4 ++ techlibs/ecp5/tests/.gitignore | 1 + techlibs/ecp5/tests/test_diamond_ffs.py | 82 +++++++++++++++++++++++++ 3 files changed, 87 insertions(+) create mode 100644 techlibs/ecp5/tests/.gitignore create mode 100644 techlibs/ecp5/tests/test_diamond_ffs.py diff --git a/techlibs/ecp5/cells_sim.v b/techlibs/ecp5/cells_sim.v index ba5b9c715..75a1aad1f 100644 --- a/techlibs/ecp5/cells_sim.v +++ b/techlibs/ecp5/cells_sim.v @@ -693,5 +693,9 @@ module DP16KD( parameter INITVAL_3F = 320'h00000000000000000000000000000000000000000000000000000000000000000000000000000000; endmodule +`ifndef NO_INCLUDES + `include "cells_ff.vh" `include "cells_io.vh" + +`endif diff --git a/techlibs/ecp5/tests/.gitignore b/techlibs/ecp5/tests/.gitignore new file mode 100644 index 000000000..0e18132cc --- /dev/null +++ b/techlibs/ecp5/tests/.gitignore @@ -0,0 +1 @@ +work_* diff --git a/techlibs/ecp5/tests/test_diamond_ffs.py b/techlibs/ecp5/tests/test_diamond_ffs.py new file mode 100644 index 000000000..1ed85ce8b --- /dev/null +++ b/techlibs/ecp5/tests/test_diamond_ffs.py @@ -0,0 +1,82 @@ +import os +import subprocess + +if not os.path.exists("work_ff"): + os.mkdir("work_ff") + +modules = [] + +with open("../cells_ff.vh", "r") as f: + with open("work_ff/cells_ff_gate.v", "w") as g: + for line in f: + if not line.startswith("module"): + g.write(line) + continue + else: + spidx = line.find(" ") + bridx = line.find("(") + modname = line[spidx+1 : bridx] + g.write("module %s_gate" % modname) + g.write(line[bridx:]) + inpidx = line.find("input ") + outpidx = line.find(", output") + modules.append((modname, [x.strip() for x in line[inpidx+6:outpidx].split(",")])) + +with open("work_ff/testbench.v", "w") as f: + print(""" +`timescale 1ns/ 1ps + +module testbench; +reg pur = 0, clk, rst, cen, d; + +// Needed for Diamond sim models +GSR GSR_INST (.GSR(1'b1)); +PUR PUR_INST (.PUR(pur)); + + +initial begin + $dumpfile("work_ff/ffs.vcd"); + $dumpvars(0, testbench); + #5; + pur = 1; + #95; + repeat (2500) begin + {clk, rst, cen, d} = $random; + #10; + check_outputs; + #1; + end + $finish; +end + """, file=f) + + for modname, inputs in modules: + print(" wire %s_gold_q, %s_gate_q;" % (modname, modname), file=f) + portconns = [] + for inp in inputs: + if inp in ("SCLK", "CK"): + portconns.append(".%s(clk)" % inp) + elif inp in ("CD", "PD"): + portconns.append(".%s(rst)" % inp) + elif inp == "SP": + portconns.append(".%s(cen)" % inp) + elif inp == "D": + portconns.append(".%s(d)" % inp) + else: + assert False + portconns.append(".Q(%s_gold_q)" % modname) + print(" %s %s_gold_i (%s);" % (modname, modname, ", ".join(portconns)), file=f) + portconns[-1] = (".Q(%s_gate_q)" % modname) + print(" %s_gate %s_gate_i (%s);" % (modname, modname, ", ".join(portconns)), file=f) + print("", file=f) + print(" task check_outputs;", file=f) + print(" begin", file=f) + print(" if (%s_gold_q != %s_gate_q) $display(\"MISMATCH at %%1t: %s_gold_q=%%b, %s_gate_q=%%b\", $time, %s_gold_q, %s_gate_q);" % + (modname, modname, modname, modname, modname, modname), file=f) + print(" end", file=f) + print(" endtask", file=f) + print("endmodule", file=f) + +diamond_models = "/usr/local/diamond/3.10_x64/cae_library/simulation/verilog/ecp5u" +subprocess.call(["iverilog", "-s", "testbench", "-o", "work_ff/testbench", "-Dmixed_hdl", "-DNO_INCLUDES", "-y", diamond_models, "work_ff/cells_ff_gate.v", "../cells_sim.v", "work_ff/testbench.v"]) +subprocess.call(["vvp", "work_ff/testbench"]) -- 2.30.2