Unverified Commit 5f8fb31b by Miodrag Milanović Committed by GitHub

Merge pull request #59 from SergeyDegtyar/master

Add new tests for passes/techmap, abc9, test_cell, synth -abc9; New tests to 'architecture'.
parents 03487ce0 4332e325
......@@ -38,20 +38,21 @@ $(eval $(call template,synth_coolrunner2_error,synth_coolrunner2_fully_selected)
$(eval $(call template,synth_easic_error,synth_easic_fully_selected))
#ecp5
$(eval $(call template,synth_ecp5,synth_ecp5 synth_ecp5_top synth_ecp5_blif synth_ecp5_edif synth_ecp5_json synth_ecp5_run synth_ecp5_flatten synth_ecp5_noflatten synth_ecp5_retime synth_ecp5_noccu2 synth_ecp5_nodffe synth_ecp5_nobram synth_ecp5_nodram synth_ecp5_nomux synth_ecp5_abc2 synth_ecp5_vpr ecp5_ffinit))
$(eval $(call template,synth_ecp5_wide_ffs,synth_ecp5 synth_ecp5_top synth_ecp5_blif synth_ecp5_edif synth_ecp5_json synth_ecp5_run synth_ecp5_flatten synth_ecp5_noflatten synth_ecp5_retime synth_ecp5_noccu2 synth_ecp5_nodffe synth_ecp5_nobram synth_ecp5_nodram synth_ecp5_nomux synth_ecp5_abc2 synth_ecp5_vpr ecp5_ffinit))
$(eval $(call template,synth_ecp5,synth_ecp5 synth_ecp5_top synth_ecp5_blif synth_ecp5_edif synth_ecp5_json synth_ecp5_run synth_ecp5_flatten synth_ecp5_noflatten synth_ecp5_retime synth_ecp5_noccu2 synth_ecp5_nodffe synth_ecp5_nobram synth_ecp5_nodram synth_ecp5_nomux synth_ecp5_abc2 synth_ecp5_vpr ecp5_ffinit synth_ecp5_abc9 synth_ecp5_abc9_nowidelut))
$(eval $(call template,synth_ecp5_wide_ffs,synth_ecp5 synth_ecp5_top synth_ecp5_blif synth_ecp5_edif synth_ecp5_json synth_ecp5_run synth_ecp5_flatten synth_ecp5_noflatten synth_ecp5_retime synth_ecp5_noccu2 synth_ecp5_nodffe synth_ecp5_nobram synth_ecp5_nodram synth_ecp5_nomux synth_ecp5_abc2 synth_ecp5_vpr ecp5_ffinit synth_ecp5_abc9 synth_ecp5_abc9_nowidelut))
$(eval $(call template,synth_ecp5_error,synth_ecp5_fully_selected))
#gowin
$(eval $(call template,synth_gowin,synth_gowin synth_gowin_top synth_gowin_vout synth_gowin_run synth_gowin_retime synth_gowin_nobram synth_gowin_noflatten ))
$(eval $(call template,synth_gowin_mem,synth_gowin synth_gowin_top synth_gowin_vout synth_gowin_run synth_gowin_retime synth_gowin_nobram synth_gowin_noflatten ))
$(eval $(call template,synth_gowin,synth_gowin synth_gowin_top synth_gowin_vout synth_gowin_run synth_gowin_retime synth_gowin_nobram synth_gowin_noflatten synth_gowin_nodram synth_gowin_nodffe ))
$(eval $(call template,synth_gowin_mem,synth_gowin synth_gowin_top synth_gowin_vout synth_gowin_run synth_gowin_retime synth_gowin_nobram synth_gowin_noflatten synth_gowin_nodram synth_gowin_nodffe ))
$(eval $(call template,synth_gowin_error,synth_gowin_fully_selected ))
#ice40
$(eval $(call template,synth_ice40,synth_ice40 synth_ice40_top synth_ice40_blif synth_ice40_edif synth_ice40_json synth_ice40_run synth_ice40_noflatten synth_ice40_flatten synth_ice40_retime synth_ice40_nocarry synth_ice40_nodffe synth_ice40_nobram synth_ice40_abc2 synth_ice40_vpr synth_ice40_relut synth_ice40_dsp synth_ice40_min_ce synth_ice40_noabc))
$(eval $(call template,synth_ice40_mem,synth_ice40 synth_ice40_top synth_ice40_blif synth_ice40_edif synth_ice40_json synth_ice40_run synth_ice40_noflatten synth_ice40_flatten synth_ice40_retime synth_ice40_nocarry synth_ice40_nodffe synth_ice40_nobram synth_ice40_abc2 synth_ice40_vpr synth_ice40_relut synth_ice40_dsp synth_ice40_min_ce synth_ice40_noabc))
$(eval $(call template,synth_ice40_wide_ffs,synth_ice40 synth_ice40_top synth_ice40_blif synth_ice40_edif synth_ice40_json synth_ice40_run synth_ice40_noflatten synth_ice40_flatten synth_ice40_nocarry synth_ice40_nodffe synth_ice40_nobram synth_ice40_abc2 synth_ice40_vpr synth_ice40_relut synth_ice40_dsp synth_ice40_min_ce synth_ice40_noabc))
$(eval $(call template,synth_ice40_error,synth_ice40_fully_selected))
$(eval $(call template,synth_ice40,synth_ice40 synth_ice40_top synth_ice40_blif synth_ice40_edif synth_ice40_json synth_ice40_run synth_ice40_noflatten synth_ice40_flatten synth_ice40_retime synth_ice40_nocarry synth_ice40_nodffe synth_ice40_nobram synth_ice40_abc2 synth_ice40_vpr synth_ice40_relut synth_ice40_dsp synth_ice40_min_ce synth_ice40_noabc synth_ice40_device_u synth_ice40_device_lp synth_ice40_device_hx synth_ice40_opt))
$(eval $(call template,synth_ice40_mem,synth_ice40 synth_ice40_top synth_ice40_blif synth_ice40_edif synth_ice40_json synth_ice40_run synth_ice40_noflatten synth_ice40_flatten synth_ice40_retime synth_ice40_nocarry synth_ice40_nodffe synth_ice40_nobram synth_ice40_abc2 synth_ice40_vpr synth_ice40_relut synth_ice40_dsp synth_ice40_min_ce synth_ice40_noabc synth_ice40_device_u synth_ice40_device_lp synth_ice40_device_hx synth_ice40_abc9 synth_ice40_unlut synth_ice40_opt))
$(eval $(call template,synth_ice40_wide_ffs,synth_ice40 synth_ice40_top synth_ice40_blif synth_ice40_edif synth_ice40_json synth_ice40_run synth_ice40_noflatten synth_ice40_flatten synth_ice40_nocarry synth_ice40_nodffe synth_ice40_nobram synth_ice40_abc2 synth_ice40_vpr synth_ice40_relut synth_ice40_dsp synth_ice40_min_ce synth_ice40_noabc synth_ice40_device_u synth_ice40_device_lp synth_ice40_device_hx synth_ice40_opt))
$(eval $(call template,synth_ice40_fulladder,synth_ice40 synth_ice40_top synth_ice40_blif synth_ice40_edif synth_ice40_json synth_ice40_run synth_ice40_noflatten synth_ice40_flatten synth_ice40_nocarry synth_ice40_nodffe synth_ice40_nobram synth_ice40_abc2 synth_ice40_vpr synth_ice40_relut synth_ice40_dsp synth_ice40_min_ce synth_ice40_noabc synth_ice40_device_u synth_ice40_device_lp synth_ice40_device_hx synth_ice40_opt))
$(eval $(call template,synth_ice40_error,synth_ice40_fully_selected synth_ice40_abc9_retime synth_ice40_device_unknown))
#intel
$(eval $(call template,synth_intel,synth_intel synth_intel_top synth_intel_vqm synth_intel_vpr synth_intel_run synth_intel_noflatten synth_intel_retime synth_intel_iopads synth_intel_nobram synth_intel_max10 ))
......@@ -67,8 +68,8 @@ $(eval $(call template,synth_sf2,synth_sf2 synth_sf2_top synth_sf2_edif synth_sf
$(eval $(call template,synth_sf2_error,synth_sf2_fully_selected ))
#xilinx
$(eval $(call template,synth_xilinx,synth_xilinx synth_xilinx_top synth_xilinx_blif synth_xilinx_edif synth_xilinx_run synth_xilinx_flatten synth_xilinx_retime synth_xilinx_vpr synth_xilinx_arch_xcup synth_xilinx_arch_xcu synth_xilinx_arch_xc7 synth_xilinx_arch_xc6s synth_xilinx_nobram synth_xilinx_nodram synth_xilinx_nosrl))
$(eval $(call template,synth_xilinx_error,synth_xilinx_fully_selected synth_xilinx_invalid_arch ))
$(eval $(call template,synth_xilinx,synth_xilinx synth_xilinx_top synth_xilinx_blif synth_xilinx_edif synth_xilinx_run synth_xilinx_flatten synth_xilinx_retime synth_xilinx_vpr synth_xilinx_arch_xcup synth_xilinx_arch_xcu synth_xilinx_arch_xc7 synth_xilinx_arch_xc6s synth_xilinx_nobram synth_xilinx_nodram synth_xilinx_nosrl synth_xilinx_widemux synth_xilinx_nowidelut synth_xilinx_nocarry synth_xilinx_arch_xc6s_abc9 synth_xilinx_widemux_9 synth_xilinx_widemux_2 synth_xilinx_widemux_3 synth_xilinx_nowidelut_abc9))
$(eval $(call template,synth_xilinx_error,synth_xilinx_fully_selected synth_xilinx_invalid_arch synth_xilinx_abc9_retime synth_xilinx_widemux_1))
ifeq ($(ENABLE_HEAVY_TESTS),1)
$(eval $(call template,synth_xilinx_srl,synth_xilinx_srl))
$(eval $(call template,synth_xilinx_mux,synth_xilinx_mux))
......@@ -77,6 +78,7 @@ endif
#greenpak4
$(eval $(call template,synth_greenpak4,synth_greenpak4 synth_greenpak4_top synth_greenpak4_json synth_greenpak4_run synth_greenpak4_noflatten synth_greenpak4_retime synth_greenpak4_part621 synth_greenpak4_part620 synth_greenpak4_part140))
$(eval $(call template,synth_greenpak4_wide_ffs,synth_greenpak4 synth_greenpak4_top synth_greenpak4_json synth_greenpak4_run synth_greenpak4_noflatten synth_greenpak4_retime synth_greenpak4_part621 synth_greenpak4_part620 synth_greenpak4_part140))
$(eval $(call template,synth_greenpak4_dffs_r,synth_greenpak4 synth_greenpak4_top synth_greenpak4_json synth_greenpak4_run synth_greenpak4_noflatten synth_greenpak4_retime synth_greenpak4_part621 synth_greenpak4_part620 synth_greenpak4_part140))
$(eval $(call template,synth_greenpak4_error,synth_greenpak4_fully_selected synth_greenpak4_invalid_part))
.PHONY: all clean
......@@ -22,6 +22,14 @@ if echo "$1" | grep ".*_error"; then
expected_string="ERROR: Invalid or no family specified:"
elif [ "$2" = "synth_xilinx_invalid_arch" ]; then
expected_string="ERROR: Invalid Xilinx -family setting: "
elif [ "$2" = "synth_xilinx_widemux_1" ]; then
expected_string="ERROR: -widemux value must be 0 or >= 2."
elif [ "$2" = "synth_xilinx_abc9_retime" ]; then
expected_string="ERROR: -retime option not currently compatible with -abc9!"
elif [ "$2" = "synth_ice40_abc9_retime" ]; then
expected_string="ERROR: -retime option not currently compatible with -abc9!"
elif [ "$2" = "synth_ice40_device_unknown" ]; then
expected_string="ERROR: Invalid or no device specified: "
fi
if yosys -ql yosys.log ../../scripts/$2.ys; then
......@@ -87,6 +95,8 @@ else
iverilog -o testbench ../testbench.v synth.v ../../common.v $COMMON_PREFIX/simcells.v $TECHLIBS_PREFIX/ice40/cells_sim.v
elif [ "$1" = "synth_ice40_wide_ffs" ]; then
iverilog -o testbench ../testbench.v synth.v ../../common.v $COMMON_PREFIX/simcells.v $TECHLIBS_PREFIX/ice40/cells_sim.v
elif [ "$1" = "synth_ice40_fulladder" ]; then
iverilog -o testbench ../testbench.v synth.v ../../common.v $COMMON_PREFIX/simcells.v $TECHLIBS_PREFIX/ice40/cells_sim.v
elif [ "$1" = "synth_intel" ]; then
iverilog -o testbench ../testbench.v synth.v ../../common.v $COMMON_PREFIX/simcells.v $TECHLIBS_PREFIX/intel/max10/cells_sim.v
elif [ "$1" = "synth_intel_a10gx" ]; then
......@@ -107,6 +117,8 @@ else
iverilog -o testbench ../testbench.v synth.v ../../common.v $COMMON_PREFIX/simcells.v $TECHLIBS_PREFIX/greenpak4/cells_sim_digital.v
elif [ "$1" = "synth_greenpak4_wide_ffs" ]; then
iverilog -o testbench ../testbench.v synth.v ../../common.v $COMMON_PREFIX/simcells.v $TECHLIBS_PREFIX/greenpak4/cells_sim_digital.v
elif [ "$1" = "synth_greenpak4_dffs_r" ]; then
iverilog -o testbench ../testbench.v synth.v ../../common.v $COMMON_PREFIX/simcells.v $TECHLIBS_PREFIX/greenpak4/cells_sim_digital.v
else
iverilog -o testbench ../testbench.v synth.v ../../common.v $COMMON_PREFIX/simcells.v
fi
......
read_verilog ../top.v
synth_ecp5 -abc9
write_verilog synth.v
read_verilog ../top.v
synth_ecp5 -abc9 -nowidelut
write_verilog synth.v
read_verilog ../top.v
synth_gowin -nodffe
write_verilog synth.v
read_verilog ../top.v
synth_gowin -nodram
write_verilog synth.v
read_verilog ../top.v
synth_ice40 -abc9
ice40_unlut
ice40_opt
write_verilog synth.v
read_verilog ../top.v
synth_ice40 -abc9 -retime
write_verilog synth.v
read_verilog ../top.v
synth_ice40 -device hx
write_verilog synth.v
read_verilog ../top.v
synth_ice40 -device lp
write_verilog synth.v
read_verilog ../top.v
synth_ice40 -device u
write_verilog synth.v
read_verilog ../top.v
synth_ice40 -device unknown
write_verilog synth.v
read_verilog ../top.v
synth_ice40
ice40_opt
write_verilog synth.v
read_verilog ../top.v
synth_ice40
ice40_unlut
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -abc9
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -abc9 -retime
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -arch xc6s -abc9
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -nocarry
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -nowidelut
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -nowidelut -abc9
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -widemux 5
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -widemux 1
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -widemux 2
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -widemux 3
write_verilog synth.v
read_verilog ../top.v
synth_xilinx -widemux 9
write_verilog synth.v
module testbench;
reg clk;
initial begin
// $dumpfile("testbench.vcd");
// $dumpvars(0, testbench);
#5 clk = 0;
repeat (10000) begin
#5 clk = 1;
#5 clk = 0;
end
$display("OKAY");
end
reg [2:0] dinA = 0;
wire doutB,doutB1;
reg dffs,dffr = 0;
top uut (
.clk (clk ),
.a (dinA[0] ),
.pre (dinA[1] ),
.clr (dinA[2] ),
.b (doutB ),
.b1 (doutB1 )
);
always @(posedge clk) begin
#3;
dinA <= dinA + 1;
end
always @( posedge clk, negedge dinA[1] )
if ( !dinA[1] )
dffs <= 1'b1;
else
dffs <= dinA[0];
always @( posedge clk, negedge dinA[2] )
if ( !dinA[2] )
dffr <= 1'b0;
else
dffr <= dinA[0];
assert_dff dffs_test(.clk(clk), .test(doutB), .pat(dffs));
assert_dff dffr_test(.clk(clk), .test(doutB1), .pat(dffr));
endmodule
module dffs
( input d, clk, pre, output reg q );
initial begin
q = 0;
end
always @( posedge clk, negedge pre )
if ( !pre )
`ifndef BUG
q <= 1'b1;
`else
q <= d;
`endif
else
q <= d;
endmodule
module dffr
( input d, clk, clr, output reg q );
initial begin
q = 0;
end
always @( posedge clk, negedge clr )
if ( !clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else
q <= d;
endmodule
module top (
input clk,
input clr,
input pre,
input a,
output b,b1
);
dffs u_dffs (
.clk (clk ),
.pre (pre),
.d (a ),
.q (b )
);
dffr u_dffr (
.clk (clk ),
.clr (clr ),
.d (a ),
.q (b1 )
);
endmodule
module testbench;
reg [2:0] in;
wire patt_out,out;
wire patt_carry_out,carryout;
initial begin
// $dumpfile("testbench.vcd");
// $dumpvars(0, testbench);
#5 in = 0;
repeat (10000) begin
#5 in = in + 1;
end
$display("OKAY");
end
top uut (
.x(in[0]),
.y(in[1]),
.cin(in[2]),
.A(out),
.cout(carryout)
);
assign {patt_carry_out,patt_out} = in[2] + in[1] + in[0];
assert_comb out_test(.A(patt_out), .B(out));
assert_comb carry_test(.A(patt_carry_out), .B(carryout));
endmodule
module top
(
input x,
input y,
input cin,
output A,
output cout
);
`ifndef BUG
assign {cout,A} = cin + y + x;
`else
assign {cout,A} = cin - y * x;
`endif
endmodule
......@@ -59,6 +59,9 @@ $(eval $(call template,write_firrtl_reduce,write_firrtl ))
$(eval $(call template,write_firrtl_shift,write_firrtl ))
$(eval $(call template,write_firrtl_shiftx,write_firrtl ))
$(eval $(call template,write_firrtl_paramod,write_firrtl))
$(eval $(call template,write_firrtl_mul,write_firrtl))
$(eval $(call template,write_firrtl_sub,write_firrtl))
$(eval $(call template,write_firrtl_pow,write_firrtl))
$(eval $(call template,write_firrtl_error, write_firrtl_fully_selected write_firrtl_negative_edge_ff write_firrtl_inout_port write_firrtl_unclocked_write_port write_firrtl_complex_write_enable ))
#write_ilang
......
module testbench;
reg [2:0] in;
wire patt_out,out;
wire patt_carry_out,carryout;
initial begin
// $dumpfile("testbench.vcd");
// $dumpvars(0, testbench);
#5 in = 0;
repeat (10000) begin
#5 in = in + 1;
end
$display("OKAY");
end
top uut (
.x(in[0]),
.y(in[1]),
.cin(in[2]),
.A(out),
.cout(carryout)
);
assign patt_carry_out = in[2] / in[1];
assign patt_out = in[2] * in[0];
assert_comb out_test(.A(patt_out), .B(out));
//assert_comb carry_test(.A(patt_carry_out), .B(carryout));
endmodule
module top
(
input x,
input y,
input cin,
output A,
output cout
);
`ifndef BUG
assign cout = cin / y;
assign A = cin * x;
`else
assign {cout,A} = cin - y * x;
`endif
endmodule
module testbench;
reg [2:0] in;
wire patt_out,out;
wire patt_carry_out,carryout;
initial begin
// $dumpfile("testbench.vcd");
// $dumpvars(0, testbench);
#5 in = 0;
repeat (10000) begin
#5 in = in + 1;
end
$display("OKAY");
end
top uut (
.x(in[0]),
.y(in[1]),
.cin(in[2]),
.A(out),
.cout(carryout)
);
//assign patt_carry_out = in[2] ** in[1];
assign patt_out = in[2] * in[0];
assert_comb out_test(.A(patt_out), .B(out));
//assert_comb carry_test(.A(patt_carry_out), .B(carryout));
endmodule
module top
(
input x,
input y,
input cin,
output A,
output cout
);
`ifndef BUG
wire pow,p,n;
assign pow = 2 ** y;
assign p = +x;
assign n = -x;
assign A = cin * x;
`else
assign {cout,A} = cin - y * x;
`endif
endmodule
module testbench;
reg [2:0] in;
wire patt_out,out;
wire patt_carry_out,carryout;
initial begin
// $dumpfile("testbench.vcd");
// $dumpvars(0, testbench);
#5 in = 0;
repeat (10000) begin
#5 in = in + 1;
end
$display("OKAY");
end
top uut (
.x(in[0]),
.y(in[1]),
.cin(in[2]),
.A(out),
.cout(carryout)
);
assign patt_carry_out = in[2] % in[1];
assign patt_out = in[2] - in[0];
assert_comb out_test(.A(patt_out), .B(out));
//assert_comb carry_test(.A(patt_carry_out), .B(carryout));
endmodule
module top
(
input x,
input y,
input cin,
output A,
output cout
);
`ifndef BUG
assign cout = cin % y;
assign A = cin - x;
`else
assign {cout,A} = cin - y * x;
`endif
endmodule
......@@ -23,7 +23,7 @@ $(eval $(call template,test_abcloop,test_abcloop test_abcloop_n test_abcloop_s )
#test_cell
#test_cell_map - takes a lot of time
# test_cell_mux, test_cell_pmux - is not supported
$(eval $(call template,test_cell,test_cell test_cell_aigmap test_cell_const test_cell_edges test_cell_f test_cell_div test_cell_muxdiv test_cell_n test_cell_noeval test_cell_nosat test_cell_s test_cell_script test_cell_simlib test_cell_v test_cell_vlog test_cell_w test_cell_alu test_cell_sop test_cell_lut test_cell_macc test_cell_lcu test_cell_fa))
$(eval $(call template,test_cell,test_cell test_cell_aigmap test_cell_const test_cell_edges test_cell_f test_cell_div test_cell_muxdiv test_cell_n test_cell_noeval test_cell_nosat test_cell_s test_cell_script test_cell_simlib test_cell_v test_cell_vlog test_cell_w test_cell_alu test_cell_sop test_cell_lut test_cell_macc test_cell_lcu test_cell_fa test_cell_wo_synth test_cell_map))
$(eval $(call template,test_cell_error, test_cell_failed_to_open test_cell_unexpected_opt test_cell_cell_type_not_supported test_cell_no_cell_t_specified test_cell_dont_spec_cell_type_with_f ))
#torder
......@@ -208,9 +208,9 @@ $(eval $(call template,tee_error, tee_o_cant_create_file tee_a_cant_create_file
$(eval $(call template,test_autotb, test_autotb test_autotb_file test_autotb_n test_autotb_seed))
#abc
$(eval $(call template,abc, abc_D abc_g_aig abc_g_cmos2 abc_g_simple abc_mux16 abc_mux4 abc_mux8 abc_S abc_dff abc_constr_liberty))
$(eval $(call template,abc_dff, abc_D abc_g_aig abc_g_cmos2 abc_g_simple abc_mux16 abc_mux4 abc_mux8 abc_S abc_dff abc_constr_liberty))
$(eval $(call template,abc_mux, abc_D abc_g_aig abc_g_cmos2 abc_g_simple abc_mux16 abc_mux4 abc_mux8 abc_S abc_dff abc_constr_liberty))
$(eval $(call template,abc, abc_D abc_g_aig abc_g_cmos2 abc_g_cmos abc_g_simple abc_mux16 abc_mux4 abc_mux8 abc_S abc_dff abc_constr_liberty))
$(eval $(call template,abc_dff, abc_D abc_g_aig abc_g_cmos2 abc_g_cmos abc_g_simple abc_mux16 abc_mux4 abc_mux8 abc_S abc_dff abc_constr_liberty))
$(eval $(call template,abc_mux, abc_D abc_g_aig abc_g_cmos2 abc_g_cmos abc_g_simple abc_mux16 abc_mux4 abc_mux8 abc_S abc_dff abc_constr_liberty))
$(eval $(call template,abc_error, abc_cannot_open abc_constr_no_liberty abc_lut_liberty abc_unsup_gate_type abc_inv_luts_synt abc_return_code abc_clk_domain_not_found abc_script_o abc_script_top))
#hilomap
......@@ -269,7 +269,11 @@ $(eval $(call template,script, script script_from_to script_scriptwire ))
$(eval $(call template,tcl, tcl ))
#abc9
$(eval $(call template,abc9, abc9_markgroups abc9_showtmp abc9_nocleanup abc9_luts abc9_lut abc9_fast abc9_D ))
$(eval $(call template,abc9, abc9_markgroups abc9_showtmp abc9_nocleanup abc9_luts abc9_lut abc9_fast abc9_D abc9_W abc9_wo_proc abc9_wo_synth abc9_box abc9_script))
$(eval $(call template,abc9_dff, abc9_markgroups abc9_showtmp abc9_nocleanup abc9_luts abc9_lut abc9_fast abc9_D abc9_W abc9_wo_proc abc9_wo_synth))
$(eval $(call template,abc9_mux, abc9_markgroups abc9_showtmp abc9_nocleanup abc9_luts abc9_lut abc9_fast abc9_D abc9_W abc9_wo_proc abc9_wo_synth))
$(eval $(call template,abc9_mem, abc9_markgroups abc9_showtmp abc9_nocleanup abc9_luts abc9_lut abc9_fast abc9_D abc9_W abc9_wo_proc abc9_wo_synth))
$(eval $(call template,abc9_error, abc9_invalid_luts_syntax abc9_cant_open_output_file))
.PHONY: all clean
module adff
( input d, clk, clr, output reg q );
initial begin
q = 0;
end
always @( posedge clk, posedge clr )
if ( clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else
q <= d;
endmodule
module adffn
( input d, clk, clr, output reg q );
initial begin
q = 0;
end
always @( posedge clk, negedge clr )
if ( !clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else
q <= d;
endmodule
module dffe
( input d, clk, en, output reg q );
initial begin
q = 0;
end
always @( posedge clk )
if ( en )
`ifndef BUG
q <= d;
`else
q <= 1'b0;
`endif
endmodule
module dffsr
( input d, clk, pre, clr, output reg q );
initial begin
q = 0;
end
always @( posedge clk, posedge pre, posedge clr )
if ( clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else if ( pre )
q <= 1'b1;
else
q <= d;
endmodule
module ndffnsnr
( input d, clk, pre, clr, output reg q );
initial begin
q = 0;
end
always @( negedge clk, negedge pre, negedge clr )
if ( !clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else if ( !pre )
q <= 1'b1;
else
q <= d;
endmodule
module top (
input clk,
input clr,
input pre,
input a,
output b,b1,b2,b3,b4
);
dffsr u_dffsr (
.clk (clk ),
.clr (clr),
.pre (pre),
.d (a ),
.q (b )
);
ndffnsnr u_ndffnsnr (
.clk (clk ),
.clr (clr),
.pre (pre),
.d (a ),
.q (b1 )
);
adff u_adff (
.clk (clk ),
.clr (clr),
.d (a ),
.q (b2 )
);
adffn u_adffn (
.clk (clk ),
.clr (clr),
.d (a ),
.q (b3 )
);
dffe u_dffe (
.clk (clk ),
.en (clr),
.d (a ),
.q (b4 )
);
endmodule
(* black_box *) module top
(
input x,
input y,
input cin,
output A,
output cout
);
`ifndef BUG
assign {cout,A} = cin + y + x;
`else
assign {cout,A} = cin - y * x;
`endif
endmodule
module top
(
input [7:0] data_a, data_b,
input [6:1] addr_a, addr_b,
input we_a, we_b, re_a, re_b, clka, clkb,
output reg [7:0] q_a, q_b
);
// Declare the RAM variable
reg [7:0] ram[63:0];
initial begin
q_a <= 8'h00;
q_b <= 8'd0;
end
// Port A
always @ (posedge clka)
begin
`ifndef BUG
if (we_a)
`else
if (we_b)
`endif
begin
ram[addr_a] <= data_a;
q_a <= data_a;
end
if (re_b)
begin
q_a <= ram[addr_a];
end
end
// Port B
always @ (posedge clkb)
begin
`ifndef BUG
if (we_b)
`else
if (we_a)
`endif
begin
ram[addr_b] <= data_b;
q_b <= data_b;
end
if (re_b)
begin
q_b <= ram[addr_b];
end
end
endmodule
module top (
input [7:0] S,
input [255:0] D,
output M256
);
assign M256 = D[S];
endmodule
......@@ -378,6 +378,10 @@ if echo "$1" | grep ".*_error"; then
elif [ "$2" = "write_file_missing_name" ] || \
[ "$2" = "write_file_a_missing_name" ]; then
expected_string="ERROR: Missing output filename."
elif [ "$2" = "abc9_invalid_luts_syntax" ]; then
expected_string="ERROR: Invalid -luts syntax."
elif [ "$2" = "abc9_cant_open_output_file" ]; then
expected_string="ERROR: Can't open ABC output file"
fi
......
read_verilog ../top.v
proc
dff2dffe
synth -top top
tee -o result.log abc9 -W -lut 2
tee -o result.log abc9 -box box.txt -lut 2
read_verilog ../top.v
tee -o result.log abc9 -luts uu
read_verilog ../top.v
tee -o result.log abc9 -luts 2:2:2:/2
tee -o result.log abc9 -script box.txt -lut 2
read_verilog ../top.v
tee -o result.log abc9 -lut 2
read_verilog ../top.v
proc
tee -o result.log abc9 -lut 2
read_verilog ../top.v
synth -top top
tee -o result.log abc -g cmos
read_verilog ../top.v
synth -top top
tee -o result.log test_cell -n 2 -map ../simlib.v $add
tee -o result.log test_cell -n 2 -map +/techmap.v $add
read_verilog ../top.v
proc
tee -o result.log test_cell $add
......@@ -64,7 +64,7 @@ $(eval $(call template,fsm, fsm))
$(eval $(call template,fsm_opt, fsm))
#Extract full and half adders
$(eval $(call template,full_adder,full_adder half_adder))
$(eval $(call template,full_adder,full_adder half_adder full_adder_d full_adder_b full_adder_wo_opt))
#Extract reduce
$(eval $(call template,reduce,reduce reduce_allow_off_chain))
......@@ -84,7 +84,7 @@ $(eval $(call template,clk2fflogic_latch,clk2fflogic))
$(eval $(call template,clk2fflogic_mem,clk2fflogic_mem))
#muxcover
$(eval $(call template,muxcover,muxcover muxcover_nodecode muxcover_mux4 muxcover_mux4_nodecode muxcover_mux16 muxcover_mux16_nodecode muxcover_4_8_16_nodecode))
$(eval $(call template,muxcover,muxcover muxcover_nodecode muxcover_mux4 muxcover_mux4_nodecode muxcover_mux16 muxcover_mux16_nodecode muxcover_4_8_16_nodecode muxcover_mux2 muxcover_dmux))
$(eval $(call template,muxcover_mux8,muxcover_mux8 muxcover_mux8_nodecode))
#aigmap
......@@ -143,7 +143,7 @@ $(eval $(call template,flowmap_latch,flowmap flowmap_cells flowmap_debug_relax f
$(eval $(call template,flowmap_mem,flowmap flowmap_cells flowmap_debug_relax flowmap_debug flowmap_maxlut flowmap_minlut flowmap_optarea flowmap_r_alpha flowmap_r_beta flowmap_r_gamma flowmap_relax flowmap_relax_debug flowmap_relax_debug_relax flowmap_top))
#iopadmap
$(eval $(call template,iopadmap,iopadmap))
$(eval $(call template,iopadmap,iopadmap iopadmap_dont_map))
#tribuf
$(eval $(call template,tribuf,tribuf tribuf_top tribuf_merge_top))
......@@ -224,8 +224,15 @@ $(eval $(call template, prep, prep prep_top prep_auto_top prep_flatten prep_ifx
$(eval $(call template_error, prep_error, prep_error))
#synth
$(eval $(call template, synth, synth synth_top synth_auto_top synth_encfile synth_run synth_run_full synth_flatten synth_lut synth_nofsm synth_noabc synth_noabc_lut synth_noalumacc synth_nordff synth_noshare))
$(eval $(call template_error, synth_error, synth_error))
$(eval $(call template, synth, synth synth_top synth_auto_top synth_encfile synth_run synth_run_full synth_flatten synth_lut synth_nofsm synth_noabc synth_noabc_lut synth_noalumacc synth_nordff synth_noshare synth_abc9))
$(eval $(call template_error, synth_error, synth_error synth_abc9_no_lut))
#simplemap
$(eval $(call template, simplemap, simplemap simplemap_top simplemap_slice_concat))
$(eval $(call template, simplemap_reduce, simplemap simplemap_top simplemap_slice_concat))
$(eval $(call template, simplemap_mem_slice_concat, simplemap simplemap_top simplemap_slice_concat))
#techmap
$(eval $(call template, techmap, techmap techmap_wb techmap_autoproc techmap_recursive techmap_extern techmap_assert techmap_i techmap_d techmap_max_iter techmap_map))
.PHONY: all clean
......@@ -68,6 +68,8 @@ if echo "$1" | grep ".*_error"; then
expected_string="ERROR: More than one module selected:"
elif [ "$2" = "synth_error" ]; then
expected_string="ERROR: This command only operates on fully selected designs!"
elif [ "$2" = "synth_abc9_no_lut" ]; then
expected_string="ERROR: ABC9 flow only supported for FPGA synthesis (using '-lut' option)"
elif [ "$2" = "zinit_failed_to_handle" ]; then
expected_string="ERROR: Failed to handle init bit"
fi
......
read_verilog ../top.v
synth -top top
extract_fa -fa -b 12 top
tee -o result.log dump
synth -top top
write_verilog synth.v
read_verilog ../top.v
synth -top top
extract_fa -fa -d 6 top
tee -o result.log dump
synth -top top
write_verilog synth.v
read_verilog ../top.v
synth -top top
extract_fa
tee -o result.log dump
synth -top top
write_verilog synth.v
read_verilog ../top.v
proc
iopadmap -widthparam wp
iopadmap -nameparam np
iopadmap -bits
iopadmap -inpad IBUF O:I
iopadmap -outpad IOBUFE O:IO
iopadmap -inoutpad IOBUFE O:IO
iopadmap -toutpad IOBUFE O:IO
iopadmap -tinoutpad IOBUFE O:IO
tee -o result.log dump
design -reset
read_verilog ../top.v
proc
write_verilog synth.v
read_verilog ../top.v
synth -top top
muxcover -dmux=3
tee -o result.log dump
write_verilog synth.v
read_verilog ../top.v
synth -top top
muxcover -mux2=336
tee -o result.log dump
write_verilog synth.v
read_verilog ../top.v
prep
simplemap
synth
write_verilog synth.v
read_verilog ../top.v
synth
splice
simplemap top
synth
write_verilog synth.v
read_verilog ../top.v
prep
dff2dffe
simplemap top
synth
write_verilog synth.v
read_verilog ../top.v
synth -abc9 -lut 5
write_verilog synth.v
read_verilog ../top.v
synth -abc9
write_verilog synth.v
read_verilog ../top.v
proc
techmap
synth
write_verilog synth.v
read_verilog ../top.v
proc
dff2dffe
techmap -assert -map +/techmap.v +/simlib.v
synth
write_verilog synth.v
read_verilog ../top.v
techmap -autoproc
write_verilog synth.v
read_verilog ../top.v
proc
techmap -D U
synth
write_verilog synth.v
read_verilog ../top.v
proc
techmap -extern
synth
write_verilog synth.v
read_verilog ../top.v
proc
techmap -I techmap
synth
write_verilog synth.v
read_verilog ../top.v
proc
techmap -map +/techmap.v
synth
write_verilog synth.v
read_verilog ../top.v
proc
techmap -max_iter 2
synth
write_verilog synth.v
read_verilog ../top.v
proc
techmap -recursive
synth
write_verilog synth.v
read_verilog ../top.v
techmap -wb
write_verilog synth.v
module testbench;
reg clk;
initial begin
// $dumpfile("testbench.vcd");
// $dumpvars(0, testbench);
#5 clk = 0;
repeat (10000) begin
#5 clk = 1;
#5 clk = 0;
end
$display("OKAY");
end
reg [2:0] dinA = 0;
wire doutB,doutB1,doutB2,doutB3,doutB4;
reg dff,ndff,adff,adffn,dffe = 0;
top uut (
.clk (clk ),
.a (dinA[0] ),
.pre (dinA[1] ),
.clr (dinA[2] ),
.b (doutB ),
.b1 (doutB1 ),
.b2 (doutB2 ),
.b3 (doutB3 ),
.b4 (doutB4 )
);
always @(posedge clk) begin
#3;
dinA <= dinA + 1;
end
always @( posedge clk, posedge dinA[1], posedge dinA[2] )
if ( dinA[2] )
dff <= 1'b0;
else if ( dinA[1] )
dff <= 1'b1;
else
dff <= dinA[0];
always @( negedge clk, negedge dinA[1], negedge dinA[2] )
if ( !dinA[2] )
ndff <= 1'b0;
else if ( !dinA[1] )
ndff <= 1'b1;
else
ndff <= dinA[0];
always @( posedge clk, posedge dinA[2] )
if ( dinA[2] )
adff <= 1'b0;
else
adff <= dinA[0];
always @( posedge clk, negedge dinA[2] )
if ( !dinA[2] )
adffn <= 1'b0;
else
adffn <= dinA[0];
always @( posedge clk )
if ( dinA[2] )
dffe <= dinA[0];
assert_dff dff_test(.clk(clk), .test(doutB), .pat(dff));
assert_dff ndff_test(.clk(clk), .test(doutB1), .pat(ndff));
assert_dff adff_test(.clk(clk), .test(doutB2), .pat(adff));
assert_dff adffn_test(.clk(clk), .test(doutB3), .pat(adffn));
assert_dff dffe_test(.clk(clk), .test(doutB4), .pat(dffe));
endmodule
module adff
( input d, clk, clr, output reg q );
initial begin
q = 0;
end
always @( posedge clk, posedge clr )
if ( clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else
q <= d;
endmodule
module adffn
( input d, clk, clr, output reg q );
initial begin
q = 0;
end
always @( posedge clk, negedge clr )
if ( !clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else
q <= d;
endmodule
module dffe
( input d, clk, en, output reg q );
initial begin
q = 0;
end
always @( posedge clk )
if ( en )
`ifndef BUG
q <= d;
`else
q <= 1'b0;
`endif
endmodule
module dffsr
( input d, clk, pre, clr, output reg q );
initial begin
q = 0;
end
always @( posedge clk, posedge pre, posedge clr )
if ( clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else if ( pre )
q <= 1'b1;
else
q <= d;
endmodule
module ndffnsnr
( input d, clk, pre, clr, output reg q );
initial begin
q = 0;
end
always @( negedge clk, negedge pre, negedge clr )
if ( !clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else if ( !pre )
q <= 1'b1;
else
q <= d;
endmodule
module top (
input clk,
input clr,
input pre,
input a,
output b,b1,b2,b3,b4
);
dffsr u_dffsr (
.clk (clk ),
.clr (clr),
.pre (pre),
.d (a ),
.q (b )
);
ndffnsnr u_ndffnsnr (
.clk (clk ),
.clr (clr),
.pre (pre),
.d (a ),
.q (b1 )
);
adff u_adff (
.clk (clk ),
.clr (clr),
.d (a ),
.q (b2 )
);
adffn u_adffn (
.clk (clk ),
.clr (clr),
.d (a ),
.q (b3 )
);
dffe u_dffe (
.clk (clk ),
.en (clr),
.d (a ),
.q (b4 )
);
endmodule
module testbench;
reg clk;
initial begin
// $dumpfile("testbench.vcd");
// $dumpvars(0, testbench);
#5 clk = 0;
repeat (10000) begin
#5 clk = 1;
#5 clk = 0;
end
$display("OKAY");
end
reg [7:0] data_a = 0;
reg [7:0] data_b = 0;
reg [5:0] addr_a = 0;
reg [5:0] addr_b = 0;
reg we_a = 0;
reg we_b = 1;
reg re_a = 1;
reg re_b = 1;
wire [7:0] q_a,q_b;
reg mem_init = 0;
top uut (
.data_a(data_a),
.data_b(data_b),
.addr_a(addr_a),
.addr_b(addr_b),
.we_a(we_a),
.we_b(we_b),
.re_a(re_a),
.re_b(re_b),
.clk(clk),
.q_a(q_a),
.q_b(q_b)
);
always @(posedge clk) begin
#3;
data_a <= data_a + 17;
data_b <= data_b + 5;
addr_a <= addr_a + 1;
addr_b <= addr_b + 1;
end
always @(posedge addr_a) begin
#10;
if(addr_a > 6'h3E)
mem_init <= 1;
end
always @(posedge clk) begin
//#3;
we_a <= !we_a;
we_b <= !we_b;
end
uut_mem_checker port_a_test(.clk(clk), .init(mem_init), .en(!we_a), .A(q_a));
uut_mem_checker port_b_test(.clk(clk), .init(mem_init), .en(!we_b), .A(q_b));
endmodule
module uut_mem_checker(input clk, input init, input en, input [7:0] A);
always @(posedge clk)
begin
#1;
if (en == 1 & init == 1 & A === 8'bXXXXXXXX)
begin
$display("ERROR: ASSERTION FAILED in %m:",$time," ",A);
$stop;
end
end
endmodule
module top
(
input [7:0] data_a, data_b,
input [6:1] addr_a, addr_b,
input we_a, we_b, re_a, re_b, clk,
output reg [7:0] q_a, q_b
);
// Declare the RAM variable
reg [7:0] ram[63:0];
// Port A
always @ (posedge clk)
begin
`ifndef BUG
if (we_a)
begin
ram[addr_a] <= data_a;
q_a <= data_a;
end
if (re_b)
begin
q_a <= ram[addr_a];
end
`else
if (we_a)
begin
ram[addr_a] <= 8'bXXXXXXXX;
q_a <= 8'bXXXXXXXX;
end
if (re_b)
begin
q_a <= ram[addr_a];
end
`endif
end
// Port B
always @ (posedge clk)
begin
`ifndef BUG
if (we_b)
begin
ram[addr_b] <= data_b;
q_b <= data_b;
end
if (re_b)
begin
q_b <= ram[addr_b];
end
`else
if (we_b)
begin
ram[addr_b] <= 8'bXXXXXXXX;
q_b <= 8'bXXXXXXXX;
end
if (re_b)
begin
q_b <= ram[addr_b];
end
`endif
end
endmodule
module testbench;
reg clk;
initial begin
// $dumpfile("testbench.vcd");
// $dumpvars(0, testbench);
#0 clk = 0;
repeat (10000) begin
#5 clk = 1;
#5 clk = 0;
end
$display("OKAY");
end
reg [1:0] a = 0;
reg rst = 0;
top uut (
.x(x),
.clk(clk),
.rst(rst),
.a(a)
);
always @(posedge clk) begin
a <= a + 1;
end
always @(posedge clk) begin
#2;
rst <= !rst;
end
uut_checker q_test(.clk(clk), .en(rst), .A(x));
endmodule
module uut_checker(input clk, input en, input A);
always @(posedge clk)
begin
#1;
if (en == 1 & A === 1'bz)
begin
$display("ERROR: ASSERTION FAILED in %m:",$time," ",A);
$stop;
end
end
endmodule
// File: design.v
// Generated by MyHDL 0.8
// Date: Tue Dec 3 04:33:14 2013
`timescale 1ns/10ps
module top (
x,clk,rst,a
);
output x;
reg x;
input clk;
input [0:0] rst;
input [0:0] a;
wire rst_or;
assign rst_or = |rst;
`ifndef BUG
always @(posedge clk, negedge rst_or) begin: DESIGN_PROCESSOR
reg i;
if (!rst_or) begin
i = 0;
x = 0;
end
else begin
case (a)
2'b00: begin
x = 0;
i = 0;
end
2'b01: begin
x = i;
end
2'b10: begin
i = 1;
end
2'b11: begin
i = 0;
end
default: begin
x = 0;
i = 0;
end
endcase
end
end
`else
always @(posedge clk, negedge rst_or) begin: DESIGN_PROCESSOR
reg i;
if (!rst_or) begin
i = 0;
x = 0;
end
else begin
case (a)
2'b00: begin
x = 1'bZ;
i = 0;
end
2'b01: begin
x = 1'bZ;
end
2'b10: begin
i = 1;
end
2'b11: begin
i = 0;
end
default: begin
x = 1'bZ;
i = 0;
end
endcase
end
end
`endif
endmodule
module testbench;
reg clk;
initial begin
// $dumpfile("testbench.vcd");
// $dumpvars(0, testbench);
#5 clk = 0;
repeat (10000) begin
#5 clk = 1;
#5 clk = 0;
end
$display("OKAY");
end
reg [2:0] dinA = 0;
wire doutB,doutB1,doutB2,doutB3,doutB4;
reg dff,ndff,adff,adffn,dffe = 0;
top uut (
.clk (clk ),
.a (dinA[0] ),
.pre (dinA[1] ),
.clr (dinA[2] ),
.b (doutB ),
.b1 (doutB1 ),
.b2 (doutB2 ),
.b3 (doutB3 ),
.b4 (doutB4 )
);
always @(posedge clk) begin
#3;
dinA <= dinA + 1;
end
always @( posedge clk)
if ( dinA[2] )
dff <= 1'b0;
else if ( dinA[1] )
dff <= 1'b1;
else
dff <= dinA[0];
always @( negedge clk)
if ( !dinA[2] )
ndff <= 1'b0;
else if ( !dinA[1] )
ndff <= 1'b1;
else
ndff <= dinA[0];
always @( posedge clk, posedge dinA[2] )
if ( dinA[2] )
adff <= 1'b0;
else
adff <= dinA[0];
always @( posedge clk, negedge dinA[2] )
if ( !dinA[2] )
adffn <= 1'b0;
else
adffn <= dinA[0];
always @( posedge clk )
if ( dinA[2] )
dffe <= dinA[0];
assert_dff dff_test(.clk(clk), .test(doutB), .pat(dff));
assert_dff ndff_test(.clk(clk), .test(doutB1), .pat(ndff));
assert_dff adff_test(.clk(clk), .test(doutB2), .pat(adff));
assert_dff adffn_test(.clk(clk), .test(doutB3), .pat(adffn));
assert_dff dffe_test(.clk(clk), .test(doutB4), .pat(dffe));
endmodule
(* \\keep_hierarchy *) module adff
( input d, clk, clr, output reg q );
initial begin
q = 0;
end
always @( posedge clk, posedge clr )
if ( clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else
q <= d;
endmodule
(* \\techmap_simplemap *)module adffn
( input d, clk, clr, output reg q );
initial begin
q = 0;
end
always @( posedge clk, negedge clr )
if ( !clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else
q <= d;
endmodule
(* \\techmap_maccmap *)module dffe
( input d, clk, en, output reg q );
initial begin
q = 0;
end
always @( posedge clk )
if ( en )
`ifndef BUG
q <= d;
`else
q <= 1'b0;
`endif
endmodule
module dffsr
( input d, clk, pre, clr, output reg q );
initial begin
q = 0;
end
always @( posedge clk)
if ( clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else if ( pre )
q <= 1'b1;
else
q <= d;
endmodule
module ndffnsnr
( input d, clk, pre, clr, output reg q );
initial begin
q = 0;
end
always @( negedge clk)
if ( !clr )
`ifndef BUG
q <= 1'b0;
`else
q <= d;
`endif
else if ( !pre )
q <= 1'b1;
else
q <= d;
endmodule
(* \\top *)module top (
input clk,
input clr,
input pre,
input a,
output b,b1,b2,b3,b4
);
dffsr u_dffsr (
.clk (clk ),
.clr (clr),
.pre (pre),
.d (a ),
.q (b )
);
ndffnsnr u_ndffnsnr (
.clk (clk ),
.clr (clr),
.pre (pre),
.d (a ),
.q (b1 )
);
adff u_adff (
.clk (clk ),
.clr (clr),
.d (a ),
.q (b2 )
);
adffn u_adffn (
.clk (clk ),
.clr (clr),
.d (a ),
.q (b3 )
);
dffe u_dffe (
.clk (clk ),
.en (clr),
.d (a ),
.q (b4 )
);
endmodule
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