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Squelch trailing whitespace

This commit is contained in:
Larry Doolittle 2017-04-08 20:54:31 -07:00 committed by Clifford Wolf
parent 41d4e91f38
commit 2021ddecb3
19 changed files with 165 additions and 165 deletions
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4
examples/cmos/counter_tb.v
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@ -12,7 +12,7 @@ module counter_tb;
# 4 reset = 0; # 4 reset = 0;
# 6 $finish; # 6 $finish;
end end
/* Make enable with period of 8 and 6,7 low */ /* Make enable with period of 8 and 6,7 low */
reg en = 1; reg en = 1;
always begin always begin
@ -25,7 +25,7 @@ module counter_tb;
/* Make a regular pulsing clock. */ /* Make a regular pulsing clock. */
reg clk = 0; reg clk = 0;
always #1 clk = !clk; always #1 clk = !clk;
/* UUT */ /* UUT */
wire [2:0] count; wire [2:0] count;
counter c1 (clk, reset, en, count); counter c1 (clk, reset, en, count);

2
examples/cmos/testbench_digital.sh
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@ -4,7 +4,7 @@ set -ex
# iverlog simulation # iverlog simulation
echo "Doing Verilog simulation with iverilog" echo "Doing Verilog simulation with iverilog"
iverilog -o counter_tb counter.v counter_tb.v iverilog -o counter_tb counter.v counter_tb.v
./counter_tb; gtkwave counter_tb.gtkw & ./counter_tb; gtkwave counter_tb.gtkw &
# yosys synthesis # yosys synthesis

22
examples/intel/DE2i-150/sevenseg.v
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@ -3,15 +3,15 @@ module sevenseg ( output reg [6:0] HEX0,
always @(*) begin always @(*) begin
case(SW) case(SW)
4'h1: HEX0 = 7'b1111001; 4'h1: HEX0 = 7'b1111001;
4'h2: HEX0 = 7'b0100100; 4'h2: HEX0 = 7'b0100100;
4'h3: HEX0 = 7'b0110000; 4'h3: HEX0 = 7'b0110000;
4'h4: HEX0 = 7'b0011001; 4'h4: HEX0 = 7'b0011001;
4'h5: HEX0 = 7'b0010010; 4'h5: HEX0 = 7'b0010010;
4'h6: HEX0 = 7'b0000010; 4'h6: HEX0 = 7'b0000010;
4'h7: HEX0 = 7'b1111000; 4'h7: HEX0 = 7'b1111000;
4'h8: HEX0 = 7'b0000000; 4'h8: HEX0 = 7'b0000000;
4'h9: HEX0 = 7'b0011000; 4'h9: HEX0 = 7'b0011000;
4'ha: HEX0 = 7'b0001000; 4'ha: HEX0 = 7'b0001000;
4'hb: HEX0 = 7'b0000011; 4'hb: HEX0 = 7'b0000011;
4'hc: HEX0 = 7'b1000110; 4'hc: HEX0 = 7'b1000110;
@ -20,6 +20,6 @@ module sevenseg ( output reg [6:0] HEX0,
4'hf: HEX0 = 7'b0001110; 4'hf: HEX0 = 7'b0001110;
4'h0: HEX0 = 7'b1000000; 4'h0: HEX0 = 7'b1000000;
endcase // case (SW) endcase // case (SW)
end end
endmodule endmodule

6
examples/intel/DE2i-150/top.v
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@ -1,8 +1,8 @@
`default_nettype none `default_nettype none
module top ( output wire [6:0] HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, HEX6, HEX7, module top ( output wire [6:0] HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, HEX6, HEX7,
input wire [15:0] SW ); input wire [15:0] SW );
sevenseg UUD0 (.HEX0(HEX0), .SW(4'h7)); sevenseg UUD0 (.HEX0(HEX0), .SW(4'h7));
sevenseg UUD1 (.HEX0(HEX1), .SW(4'h1)); sevenseg UUD1 (.HEX0(HEX1), .SW(4'h1));
sevenseg UUD2 (.HEX0(HEX2), .SW(4'h0)); sevenseg UUD2 (.HEX0(HEX2), .SW(4'h0));
@ -11,5 +11,5 @@ module top ( output wire [6:0] HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, HEX6, HEX7,
sevenseg UUD5 (.HEX0(HEX5), .SW(SW[7:4])); sevenseg UUD5 (.HEX0(HEX5), .SW(SW[7:4]));
sevenseg UUD6 (.HEX0(HEX6), .SW(SW[11:8])); sevenseg UUD6 (.HEX0(HEX6), .SW(SW[11:8]));
sevenseg UUD7 (.HEX0(HEX7), .SW(SW[15:12])); sevenseg UUD7 (.HEX0(HEX7), .SW(SW[15:12]));
endmodule endmodule

22
examples/intel/MAX10/sevenseg.v
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@ -3,15 +3,15 @@ module sevenseg ( output reg [6:0] HEX0,
always @(*) begin always @(*) begin
case(SW) case(SW)
4'h1: HEX0 = 7'b1111001; 4'h1: HEX0 = 7'b1111001;
4'h2: HEX0 = 7'b0100100; 4'h2: HEX0 = 7'b0100100;
4'h3: HEX0 = 7'b0110000; 4'h3: HEX0 = 7'b0110000;
4'h4: HEX0 = 7'b0011001; 4'h4: HEX0 = 7'b0011001;
4'h5: HEX0 = 7'b0010010; 4'h5: HEX0 = 7'b0010010;
4'h6: HEX0 = 7'b0000010; 4'h6: HEX0 = 7'b0000010;
4'h7: HEX0 = 7'b1111000; 4'h7: HEX0 = 7'b1111000;
4'h8: HEX0 = 7'b0000000; 4'h8: HEX0 = 7'b0000000;
4'h9: HEX0 = 7'b0011000; 4'h9: HEX0 = 7'b0011000;
4'ha: HEX0 = 7'b0001000; 4'ha: HEX0 = 7'b0001000;
4'hb: HEX0 = 7'b0000011; 4'hb: HEX0 = 7'b0000011;
4'hc: HEX0 = 7'b1000110; 4'hc: HEX0 = 7'b1000110;
@ -20,6 +20,6 @@ module sevenseg ( output reg [6:0] HEX0,
4'hf: HEX0 = 7'b0001110; 4'hf: HEX0 = 7'b0001110;
4'h0: HEX0 = 7'b1000000; 4'h0: HEX0 = 7'b1000000;
endcase // case (SW) endcase // case (SW)
end end
endmodule endmodule

6
examples/intel/MAX10/top.v
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@ -1,8 +1,8 @@
`default_nettype none `default_nettype none
module top ( output wire [6:0] HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, HEX6, HEX7, module top ( output wire [6:0] HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, HEX6, HEX7,
input wire [15:0] SW ); input wire [15:0] SW );
sevenseg UUD0 (.HEX0(HEX0), .SW(4'h7)); sevenseg UUD0 (.HEX0(HEX0), .SW(4'h7));
sevenseg UUD1 (.HEX0(HEX1), .SW(4'h1)); sevenseg UUD1 (.HEX0(HEX1), .SW(4'h1));
sevenseg UUD2 (.HEX0(HEX2), .SW(4'h0)); sevenseg UUD2 (.HEX0(HEX2), .SW(4'h0));
@ -11,5 +11,5 @@ module top ( output wire [6:0] HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, HEX6, HEX7,
sevenseg UUD5 (.HEX0(HEX5), .SW(SW[7:4])); sevenseg UUD5 (.HEX0(HEX5), .SW(SW[7:4]));
sevenseg UUD6 (.HEX0(HEX6), .SW(SW[11:8])); sevenseg UUD6 (.HEX0(HEX6), .SW(SW[11:8]));
sevenseg UUD7 (.HEX0(HEX7), .SW(SW[15:12])); sevenseg UUD7 (.HEX0(HEX7), .SW(SW[15:12]));
endmodule endmodule

2
passes/equiv/equiv_purge.cc
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@ -142,7 +142,7 @@ struct EquivPurgeWorker
for (auto bit : queue) for (auto bit : queue)
visited.insert(bit); visited.insert(bit);
for (auto bit : queue) for (auto bit : queue)
{ {
auto &cells = up_bit2cells[bit]; auto &cells = up_bit2cells[bit];

4
passes/fsm/fsm_detect.cc
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@ -180,7 +180,7 @@ static void detect_fsm(RTLIL::Wire *wire)
for (auto &port_it : cell->connections()) for (auto &port_it : cell->connections())
if (cell->output(port_it.first)) { if (cell->output(port_it.first)) {
SigSpec sig = assign_map(port_it.second); SigSpec sig = assign_map(port_it.second);
Const val(set_output ? State::S1 : State::S0, GetSize(sig)); Const val(set_output ? State::S1 : State::S0, GetSize(sig));
ce.set(sig, val); ce.set(sig, val);
} }
} }
@ -215,7 +215,7 @@ static void detect_fsm(RTLIL::Wire *wire)
for (auto w : warnings) warnmsg += " " + w; for (auto w : warnings) warnmsg += " " + w;
log_warning("%s", warnmsg.c_str()); log_warning("%s", warnmsg.c_str());
} else { } else {
log("FSM state register %s.%s already has fsm_encoding attribute.\n", log_id(wire->module), log_id(wire)); log("FSM state register %s.%s already has fsm_encoding attribute.\n", log_id(wire->module), log_id(wire));
} }
} }
else else

6
passes/opt/opt_expr.cc
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@ -1217,7 +1217,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
//references the constant signal in the comparison //references the constant signal in the comparison
RTLIL::SigSpec sigConst; RTLIL::SigSpec sigConst;
// note that this signal must be constant for the optimization // note that this signal must be constant for the optimization
// to take place, but it is not checked beforehand. // to take place, but it is not checked beforehand.
// If new passes are added, this signal must be checked for const-ness // If new passes are added, this signal must be checked for const-ness
@ -1307,10 +1307,10 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
RTLIL::SigSpec a_prime(RTLIL::State::S0, 1); RTLIL::SigSpec a_prime(RTLIL::State::S0, 1);
if(is_lt){ if(is_lt){
a_prime[0] = RTLIL::State::S1; a_prime[0] = RTLIL::State::S1;
log("Replacing %s cell `%s' (implementing unsigned X[%d:0] < %s[%d:0]) with constant 0.\n", log_id(cell->type), log_id(cell), width-1, log_signal(sigConst),const_width-1); log("Replacing %s cell `%s' (implementing unsigned X[%d:0] < %s[%d:0]) with constant 0.\n", log_id(cell->type), log_id(cell), width-1, log_signal(sigConst),const_width-1);
} }
else{ else{
log("Replacing %s cell `%s' (implementing unsigned X[%d:0]>= %s[%d:0]) with constant 1.\n", log_id(cell->type), log_id(cell), width-1, log_signal(sigConst),const_width-1); log("Replacing %s cell `%s' (implementing unsigned X[%d:0]>= %s[%d:0]) with constant 1.\n", log_id(cell->type), log_id(cell), width-1, log_signal(sigConst),const_width-1);
} }
module->connect(cell->getPort("\\Y"), a_prime); module->connect(cell->getPort("\\Y"), a_prime);
module->remove(cell); module->remove(cell);

2
passes/techmap/nlutmap.cc
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@ -92,7 +92,7 @@ struct NlutmapWorker
for (auto bit : sigmap(conn.second)) for (auto bit : sigmap(conn.second))
bit_lut_count[bit]++; bit_lut_count[bit]++;
} }
for (auto &cand : candidate_ratings) for (auto &cand : candidate_ratings)
{ {
for (auto &conn : cand.first->connections()) for (auto &conn : cand.first->connections())

28
techlibs/altera_intel/cycloneiv/cells_comb_cycloneiv.v
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@ -16,7 +16,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* *
*/ */
module VCC (output V); module VCC (output V);
assign V = 1'b1; assign V = 1'b1;
endmodule // VCC endmodule // VCC
@ -37,23 +37,23 @@ module cycloneiv_io_obuf (output o, input i, input oe);
assign oe = oe; assign oe = oe;
endmodule // fiftyfivenm_io_obuf endmodule // fiftyfivenm_io_obuf
/* Altera MAX10 4-input non-fracturable LUT Primitive */ /* Altera MAX10 4-input non-fracturable LUT Primitive */
module cycloneiv_lcell_comb (output combout, cout, module cycloneiv_lcell_comb (output combout, cout,
input dataa, datab, datac, datad, cin); input dataa, datab, datac, datad, cin);
/* Internal parameters which define the behaviour /* Internal parameters which define the behaviour
of the LUT primitive. of the LUT primitive.
lut_mask define the lut function, can be expressed in 16-digit bin or hex. lut_mask define the lut function, can be expressed in 16-digit bin or hex.
sum_lutc_input define the type of LUT (combinational | arithmetic). sum_lutc_input define the type of LUT (combinational | arithmetic).
dont_touch for retiming || carry options. dont_touch for retiming || carry options.
lpm_type for WYSIWYG */ lpm_type for WYSIWYG */
parameter lut_mask = 16'hFFFF; parameter lut_mask = 16'hFFFF;
parameter dont_touch = "off"; parameter dont_touch = "off";
parameter lpm_type = "cycloneiv_lcell_comb"; parameter lpm_type = "cycloneiv_lcell_comb";
parameter sum_lutc_input = "datac"; parameter sum_lutc_input = "datac";
reg [1:0] lut_type; reg [1:0] lut_type;
reg cout_rt; reg cout_rt;
reg combout_rt; reg combout_rt;
wire dataa_w; wire dataa_w;
@ -84,7 +84,7 @@ endfunction
initial begin initial begin
if (sum_lutc_input == "datac") lut_type = 0; if (sum_lutc_input == "datac") lut_type = 0;
else else
if (sum_lutc_input == "cin") lut_type = 1; if (sum_lutc_input == "cin") lut_type = 1;
else begin else begin
$error("Error in sum_lutc_input. Parameter %s is not a valid value.\n", sum_lutc_input); $error("Error in sum_lutc_input. Parameter %s is not a valid value.\n", sum_lutc_input);
@ -94,11 +94,11 @@ end
always @(dataa_w or datab_w or datac_w or datad_w or cin_w) begin always @(dataa_w or datab_w or datac_w or datad_w or cin_w) begin
if (lut_type == 0) begin // logic function if (lut_type == 0) begin // logic function
combout_rt = lut_data(lut_mask, dataa_w, datab_w, combout_rt = lut_data(lut_mask, dataa_w, datab_w,
datac_w, datad_w); datac_w, datad_w);
end end
else if (lut_type == 1) begin // arithmetic function else if (lut_type == 1) begin // arithmetic function
combout_rt = lut_data(lut_mask, dataa_w, datab_w, combout_rt = lut_data(lut_mask, dataa_w, datab_w,
cin_w, datad_w); cin_w, datad_w);
end end
cout_rt = lut_data(lut_mask, dataa_w, datab_w, cin_w, 'b0); cout_rt = lut_data(lut_mask, dataa_w, datab_w, cin_w, 'b0);
@ -111,17 +111,17 @@ endmodule // cycloneiv_lcell_comb
/* Altera Cyclone IV Flip-Flop Primitive */ /* Altera Cyclone IV Flip-Flop Primitive */
// TODO: Implement advanced simulation functions // TODO: Implement advanced simulation functions
module dffeas ( output q, module dffeas ( output q,
input d, clk, clrn, prn, ena, input d, clk, clrn, prn, ena,
input asdata, aload, sclr, sload ); input asdata, aload, sclr, sload );
parameter power_up="dontcare"; parameter power_up="dontcare";
parameter is_wysiwyg="false"; parameter is_wysiwyg="false";
reg q; reg q;
always @(posedge clk) always @(posedge clk)
q <= d; q <= d;
endmodule endmodule

14
techlibs/altera_intel/cycloneiv/cells_map_cycloneiv.v
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@ -16,7 +16,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* *
*/ */
// Flip-flop D // Flip-flop D
module \$_DFF_P_ (input D, input C, output Q); module \$_DFF_P_ (input D, input C, output Q);
parameter WYSIWYG="TRUE"; parameter WYSIWYG="TRUE";
@ -26,12 +26,12 @@ endmodule //
// Input buffer map // Input buffer map
module \$__inpad (input I, output O); module \$__inpad (input I, output O);
cycloneiv_io_ibuf _TECHMAP_REPLACE_ (.o(O), .i(I), .ibar(1'b0)); cycloneiv_io_ibuf _TECHMAP_REPLACE_ (.o(O), .i(I), .ibar(1'b0));
endmodule endmodule
// Output buffer map // Output buffer map
module \$__outpad (input I, output O); module \$__outpad (input I, output O);
cycloneiv_io_obuf _TECHMAP_REPLACE_ (.o(O), .i(I), .oe(1'b1)); cycloneiv_io_obuf _TECHMAP_REPLACE_ (.o(O), .i(I), .oe(1'b1));
endmodule endmodule
// LUT Map // LUT Map
/* 0 -> datac /* 0 -> datac
@ -41,14 +41,14 @@ module \$lut (A, Y);
parameter LUT = 0; parameter LUT = 0;
input [WIDTH-1:0] A; input [WIDTH-1:0] A;
output Y; output Y;
generate generate
if (WIDTH == 1) begin if (WIDTH == 1) begin
assign Y = ~A[0]; // Not need to spend 1 logic cell for such an easy function assign Y = ~A[0]; // Not need to spend 1 logic cell for such an easy function
end else end else
if (WIDTH == 2) begin if (WIDTH == 2) begin
cycloneiv_lcell_comb #(.lut_mask({4{LUT}}), .sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y), .dataa(A[0]), .datab(A[1]), .datac(1'b1),.datad(1'b1)); cycloneiv_lcell_comb #(.lut_mask({4{LUT}}), .sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y), .dataa(A[0]), .datab(A[1]), .datac(1'b1),.datad(1'b1));
end else end else
if(WIDTH == 3) begin if(WIDTH == 3) begin
cycloneiv_lcell_comb #(.lut_mask({2{LUT}}), .sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y), .dataa(A[0]), .datab(A[1]), .datac(A[2]),.datad(1'b1)); cycloneiv_lcell_comb #(.lut_mask({2{LUT}}), .sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y), .dataa(A[0]), .datab(A[1]), .datac(A[2]),.datad(1'b1));
end else end else
if(WIDTH == 4) begin if(WIDTH == 4) begin
@ -58,4 +58,4 @@ module \$lut (A, Y);
endgenerate endgenerate
endmodule // endmodule //

66
techlibs/altera_intel/lpm_functions.v
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@ -16,48 +16,48 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* *
*/ */
// NOTE: This is still WIP. // NOTE: This is still WIP.
(* techmap_celltype = "$altpll" *) (* techmap_celltype = "$altpll" *)
module _80_altpll_altera ( input [1:0] inclk, module _80_altpll_altera ( input [1:0] inclk,
input fbin, input fbin,
input pllena, input pllena,
input clkswitch, input clkswitch,
input areset, input areset,
input pfdena, input pfdena,
input clkena, input clkena,
input extclkena, input extclkena,
input scanclk, input scanclk,
input scanaclr, input scanaclr,
input scanclkena, input scanclkena,
input scanread, input scanread,
input scanwrite, input scanwrite,
input scandata, input scandata,
input phasecounterselect, input phasecounterselect,
input phaseupdown, input phaseupdown,
input phasestep, input phasestep,
input configupdate, input configupdate,
inout fbmimicbidir, inout fbmimicbidir,
output [width_clock-1:0] clk, output [width_clock-1:0] clk,
output [3:0] extclk, output [3:0] extclk,
output [1:0] clkbad, output [1:0] clkbad,
output enable0, output enable0,
output enable1, output enable1,
output activeclock, output activeclock,
output clkloss, output clkloss,
output locked, output locked,
output scandataout, output scandataout,
output scandone, output scandone,
output sclkout0, output sclkout0,
output sclkout1, output sclkout1,
output phasedone, output phasedone,
output vcooverrange, output vcooverrange,
output vcounderrange, output vcounderrange,
output fbout, output fbout,
output fref, output fref,
output icdrclk ); output icdrclk );
parameter intended_device_family = "MAX 10"; parameter intended_device_family = "MAX 10";
parameter operation_mode = "NORMAL"; parameter operation_mode = "NORMAL";
parameter pll_type = "AUTO"; parameter pll_type = "AUTO";
@ -123,7 +123,7 @@ module _80_altpll_altera ( input [1:0] inclk,
parameter clk2_phase_shift = "0"; parameter clk2_phase_shift = "0";
parameter clk1_phase_shift = "0"; parameter clk1_phase_shift = "0";
parameter clk0_phase_shift = "0"; parameter clk0_phase_shift = "0";
parameter clk9_duty_cycle = 50; parameter clk9_duty_cycle = 50;
parameter clk8_duty_cycle = 50; parameter clk8_duty_cycle = 50;
parameter clk7_duty_cycle = 50; parameter clk7_duty_cycle = 50;
@ -166,7 +166,7 @@ module _80_altpll_altera ( input [1:0] inclk,
parameter pfd_min = 0; parameter pfd_min = 0;
parameter pfd_max = 0; parameter pfd_max = 0;
parameter m_initial = 1; parameter m_initial = 1;
parameter m = 0; parameter m = 0;
parameter n = 1; parameter n = 1;
parameter m2 = 1; parameter m2 = 1;
parameter n2 = 1; parameter n2 = 1;
@ -316,4 +316,4 @@ module _80_altpll_altera ( input [1:0] inclk,
parameter port_scanclkena = "PORT_CONNECTIVITY"; parameter port_scanclkena = "PORT_CONNECTIVITY";
parameter using_fbmimicbidir_port = "ON"; parameter using_fbmimicbidir_port = "ON";
endmodule endmodule

18
techlibs/altera_intel/max10/cells_arith_max10.v
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@ -26,7 +26,7 @@ module _80_altera_max10_alu (A, B, CI, BI, X, Y, CO);
parameter B_WIDTH = 1; parameter B_WIDTH = 1;
parameter Y_WIDTH = 1; parameter Y_WIDTH = 1;
parameter LUT = 0; parameter LUT = 0;
input [A_WIDTH-1:0] A; input [A_WIDTH-1:0] A;
input [B_WIDTH-1:0] B; input [B_WIDTH-1:0] B;
output [Y_WIDTH-1:0] X, Y; output [Y_WIDTH-1:0] X, Y;
@ -44,19 +44,19 @@ module _80_altera_max10_alu (A, B, CI, BI, X, Y, CO);
wire [Y_WIDTH-1:0] AA = A_buf; wire [Y_WIDTH-1:0] AA = A_buf;
wire [Y_WIDTH-1:0] BB = BI ? ~B_buf : B_buf; wire [Y_WIDTH-1:0] BB = BI ? ~B_buf : B_buf;
wire [Y_WIDTH-1:0] C = {CO, CI}; wire [Y_WIDTH-1:0] C = {CO, CI};
genvar i; genvar i;
generate for (i = 0; i < Y_WIDTH; i = i + 1) begin:slice generate for (i = 0; i < Y_WIDTH; i = i + 1) begin:slice
fiftyfivenm_lcell_comb #(.lut_mask(LUT), .sum_lutc_input("cin")) _TECHMAP_REPLACE_ fiftyfivenm_lcell_comb #(.lut_mask(LUT), .sum_lutc_input("cin")) _TECHMAP_REPLACE_
( .dataa(AA), ( .dataa(AA),
.datab(BB), .datab(BB),
.datac(C), .datac(C),
.datad(1'b0), .datad(1'b0),
.cin(C[i]), .cin(C[i]),
.cout(CO[i]), .cout(CO[i]),
.combout(Y[i]) ); .combout(Y[i]) );
end: slice end: slice
endgenerate endgenerate
assign X = C; assign X = C;
endmodule endmodule

32
techlibs/altera_intel/max10/cells_comb_max10.v
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@ -16,7 +16,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* *
*/ */
module VCC (output V); module VCC (output V);
assign V = 1'b1; assign V = 1'b1;
endmodule // VCC endmodule // VCC
@ -25,7 +25,7 @@ module GND (output G);
assign G = 1'b0; assign G = 1'b0;
endmodule // GND endmodule // GND
/* Altera MAX10 devices Input Buffer Primitive */ /* Altera MAX10 devices Input Buffer Primitive */
module fiftyfivenm_io_ibuf (output o, input i, input ibar); module fiftyfivenm_io_ibuf (output o, input i, input ibar);
assign ibar = ibar; assign ibar = ibar;
assign o = i; assign o = i;
@ -37,23 +37,23 @@ module fiftyfivenm_io_obuf (output o, input i, input oe);
assign oe = oe; assign oe = oe;
endmodule // fiftyfivenm_io_obuf endmodule // fiftyfivenm_io_obuf
/* Altera MAX10 4-input non-fracturable LUT Primitive */ /* Altera MAX10 4-input non-fracturable LUT Primitive */
module fiftyfivenm_lcell_comb (output combout, cout, module fiftyfivenm_lcell_comb (output combout, cout,
input dataa, datab, datac, datad, cin); input dataa, datab, datac, datad, cin);
/* Internal parameters which define the behaviour /* Internal parameters which define the behaviour
of the LUT primitive. of the LUT primitive.
lut_mask define the lut function, can be expressed in 16-digit bin or hex. lut_mask define the lut function, can be expressed in 16-digit bin or hex.
sum_lutc_input define the type of LUT (combinational | arithmetic). sum_lutc_input define the type of LUT (combinational | arithmetic).
dont_touch for retiming || carry options. dont_touch for retiming || carry options.
lpm_type for WYSIWYG */ lpm_type for WYSIWYG */
parameter lut_mask = 16'hFFFF; parameter lut_mask = 16'hFFFF;
parameter dont_touch = "off"; parameter dont_touch = "off";
parameter lpm_type = "fiftyfivenm_lcell_comb"; parameter lpm_type = "fiftyfivenm_lcell_comb";
parameter sum_lutc_input = "datac"; parameter sum_lutc_input = "datac";
reg [1:0] lut_type; reg [1:0] lut_type;
reg cout_rt; reg cout_rt;
reg combout_rt; reg combout_rt;
wire dataa_w; wire dataa_w;
@ -84,7 +84,7 @@ endfunction
initial begin initial begin
if (sum_lutc_input == "datac") lut_type = 0; if (sum_lutc_input == "datac") lut_type = 0;
else else
if (sum_lutc_input == "cin") lut_type = 1; if (sum_lutc_input == "cin") lut_type = 1;
else begin else begin
$error("Error in sum_lutc_input. Parameter %s is not a valid value.\n", sum_lutc_input); $error("Error in sum_lutc_input. Parameter %s is not a valid value.\n", sum_lutc_input);
@ -94,11 +94,11 @@ end
always @(dataa_w or datab_w or datac_w or datad_w or cin_w) begin always @(dataa_w or datab_w or datac_w or datad_w or cin_w) begin
if (lut_type == 0) begin // logic function if (lut_type == 0) begin // logic function
combout_rt = lut_data(lut_mask, dataa_w, datab_w, combout_rt = lut_data(lut_mask, dataa_w, datab_w,
datac_w, datad_w); datac_w, datad_w);
end end
else if (lut_type == 1) begin // arithmetic function else if (lut_type == 1) begin // arithmetic function
combout_rt = lut_data(lut_mask, dataa_w, datab_w, combout_rt = lut_data(lut_mask, dataa_w, datab_w,
cin_w, datad_w); cin_w, datad_w);
end end
cout_rt = lut_data(lut_mask, dataa_w, datab_w, cin_w, 'b0); cout_rt = lut_data(lut_mask, dataa_w, datab_w, cin_w, 'b0);
@ -111,17 +111,17 @@ endmodule // fiftyfivenm_lcell_comb
/* Altera MAX10 D Flip-Flop Primitive */ /* Altera MAX10 D Flip-Flop Primitive */
// TODO: Implement advanced simulation functions // TODO: Implement advanced simulation functions
module dffeas ( output q, module dffeas ( output q,
input d, clk, clrn, prn, ena, input d, clk, clrn, prn, ena,
input asdata, aload, sclr, sload ); input asdata, aload, sclr, sload );
parameter power_up="dontcare"; parameter power_up="dontcare";
parameter is_wysiwyg="false"; parameter is_wysiwyg="false";
reg q; reg q;
always @(posedge clk) always @(posedge clk)
q <= d; q <= d;
endmodule endmodule

14
techlibs/altera_intel/max10/cells_map_max10.v
View File

@ -16,7 +16,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* *
*/ */
// Flip-flop D // Flip-flop D
module \$_DFF_P_ (input D, input C, output Q); module \$_DFF_P_ (input D, input C, output Q);
parameter WYSIWYG="TRUE"; parameter WYSIWYG="TRUE";
@ -26,12 +26,12 @@ endmodule //
// Input buffer map // Input buffer map
module \$__inpad (input I, output O); module \$__inpad (input I, output O);
fiftyfivenm_io_ibuf _TECHMAP_REPLACE_ (.o(O), .i(I), .ibar(1'b0)); fiftyfivenm_io_ibuf _TECHMAP_REPLACE_ (.o(O), .i(I), .ibar(1'b0));
endmodule endmodule
// Output buffer map // Output buffer map
module \$__outpad (input I, output O); module \$__outpad (input I, output O);
fiftyfivenm_io_obuf _TECHMAP_REPLACE_ (.o(O), .i(I), .oe(1'b1)); fiftyfivenm_io_obuf _TECHMAP_REPLACE_ (.o(O), .i(I), .oe(1'b1));
endmodule endmodule
// LUT Map // LUT Map
/* 0 -> datac /* 0 -> datac
@ -41,14 +41,14 @@ module \$lut (A, Y);
parameter LUT = 0; parameter LUT = 0;
input [WIDTH-1:0] A; input [WIDTH-1:0] A;
output Y; output Y;
generate generate
if (WIDTH == 1) begin if (WIDTH == 1) begin
assign Y = ~A[0]; // Not need to spend 1 logic cell for such an easy function assign Y = ~A[0]; // Not need to spend 1 logic cell for such an easy function
end else end else
if (WIDTH == 2) begin if (WIDTH == 2) begin
fiftyfivenm_lcell_comb #(.lut_mask({4{LUT}}), .sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y), .dataa(A[0]), .datab(A[1]), .datac(1'b1),.datad(1'b1)); fiftyfivenm_lcell_comb #(.lut_mask({4{LUT}}), .sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y), .dataa(A[0]), .datab(A[1]), .datac(1'b1),.datad(1'b1));
end else end else
if(WIDTH == 3) begin if(WIDTH == 3) begin
fiftyfivenm_lcell_comb #(.lut_mask({2{LUT}}), .sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y), .dataa(A[0]), .datab(A[1]), .datac(A[2]),.datad(1'b1)); fiftyfivenm_lcell_comb #(.lut_mask({2{LUT}}), .sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y), .dataa(A[0]), .datab(A[1]), .datac(A[2]),.datad(1'b1));
end else end else
if(WIDTH == 4) begin if(WIDTH == 4) begin
@ -58,4 +58,4 @@ module \$lut (A, Y);
endgenerate endgenerate
endmodule // endmodule //

2
techlibs/altera_intel/synth_intel.cc
View File

@ -110,7 +110,7 @@ struct SynthIntelPass : public ScriptPass {
if (!design->full_selection()) if (!design->full_selection())
log_cmd_error("This comannd only operates on fully selected designs!\n"); log_cmd_error("This comannd only operates on fully selected designs!\n");
if (family_opt != "max10" && family_opt !="cycloneiv" ) if (family_opt != "max10" && family_opt !="cycloneiv" )
log_cmd_error("Invalid or not family specified: '%s'\n", family_opt.c_str()); log_cmd_error("Invalid or not family specified: '%s'\n", family_opt.c_str());

78
techlibs/greenpak4/greenpak4_counters.cc
View File

@ -66,11 +66,11 @@ bool is_full_bus(
else if(!other_conns_allowed) else if(!other_conns_allowed)
return false; return false;
} }
if( (!found_a) || (!found_b) ) if( (!found_a) || (!found_b) )
return false; return false;
} }
return true; return true;
} }
@ -83,7 +83,7 @@ bool is_unconnected(const RTLIL::SigSpec& port, ModIndex& index)
if(ports.size() > 1) if(ports.size() > 1)
return false; return false;
} }
return true; return true;
} }
@ -105,18 +105,18 @@ struct CounterExtraction
int greenpak4_counters_tryextract(ModIndex& index, Cell *cell, CounterExtraction& extract) int greenpak4_counters_tryextract(ModIndex& index, Cell *cell, CounterExtraction& extract)
{ {
SigMap& sigmap = index.sigmap; SigMap& sigmap = index.sigmap;
//GreenPak does not support counters larger than 14 bits so immediately skip anything bigger //GreenPak does not support counters larger than 14 bits so immediately skip anything bigger
int a_width = cell->getParam("\\A_WIDTH").as_int(); int a_width = cell->getParam("\\A_WIDTH").as_int();
extract.width = a_width; extract.width = a_width;
if(a_width > 14) if(a_width > 14)
return 1; return 1;
//Second input must be a single bit //Second input must be a single bit
int b_width = cell->getParam("\\B_WIDTH").as_int(); int b_width = cell->getParam("\\B_WIDTH").as_int();
if(b_width != 1) if(b_width != 1)
return 2; return 2;
//Both inputs must be unsigned, so don't extract anything with a signed input //Both inputs must be unsigned, so don't extract anything with a signed input
bool a_sign = cell->getParam("\\A_SIGNED").as_bool(); bool a_sign = cell->getParam("\\A_SIGNED").as_bool();
bool b_sign = cell->getParam("\\B_SIGNED").as_bool(); bool b_sign = cell->getParam("\\B_SIGNED").as_bool();
@ -128,7 +128,7 @@ int greenpak4_counters_tryextract(ModIndex& index, Cell *cell, CounterExtraction
const RTLIL::SigSpec b_port = sigmap(cell->getPort("\\B")); const RTLIL::SigSpec b_port = sigmap(cell->getPort("\\B"));
if(!b_port.is_fully_const() || (b_port.as_int() != 1) ) if(!b_port.is_fully_const() || (b_port.as_int() != 1) )
return 4; return 4;
//BI and CI must be constant 1 as well //BI and CI must be constant 1 as well
const RTLIL::SigSpec bi_port = sigmap(cell->getPort("\\BI")); const RTLIL::SigSpec bi_port = sigmap(cell->getPort("\\BI"));
if(!bi_port.is_fully_const() || (bi_port.as_int() != 1) ) if(!bi_port.is_fully_const() || (bi_port.as_int() != 1) )
@ -136,13 +136,13 @@ int greenpak4_counters_tryextract(ModIndex& index, Cell *cell, CounterExtraction
const RTLIL::SigSpec ci_port = sigmap(cell->getPort("\\CI")); const RTLIL::SigSpec ci_port = sigmap(cell->getPort("\\CI"));
if(!ci_port.is_fully_const() || (ci_port.as_int() != 1) ) if(!ci_port.is_fully_const() || (ci_port.as_int() != 1) )
return 6; return 6;
//CO and X must be unconnected (exactly one connection to each port) //CO and X must be unconnected (exactly one connection to each port)
if(!is_unconnected(sigmap(cell->getPort("\\CO")), index)) if(!is_unconnected(sigmap(cell->getPort("\\CO")), index))
return 7; return 7;
if(!is_unconnected(sigmap(cell->getPort("\\X")), index)) if(!is_unconnected(sigmap(cell->getPort("\\X")), index))
return 8; return 8;
//Y must have exactly one connection, and it has to be a $mux cell. //Y must have exactly one connection, and it has to be a $mux cell.
//We must have a direct bus connection from our Y to their A. //We must have a direct bus connection from our Y to their A.
const RTLIL::SigSpec aluy = sigmap(cell->getPort("\\Y")); const RTLIL::SigSpec aluy = sigmap(cell->getPort("\\Y"));
@ -161,26 +161,26 @@ int greenpak4_counters_tryextract(ModIndex& index, Cell *cell, CounterExtraction
if(!underflow.is_fully_const()) if(!underflow.is_fully_const())
return 12; return 12;
extract.count_value = underflow.as_int(); extract.count_value = underflow.as_int();
//S connection of the mux must come from an inverter (need not be the only load) //S connection of the mux must come from an inverter (need not be the only load)
const RTLIL::SigSpec muxsel = sigmap(count_mux->getPort("\\S")); const RTLIL::SigSpec muxsel = sigmap(count_mux->getPort("\\S"));
extract.outsig = muxsel; extract.outsig = muxsel;
pool<Cell*> muxsel_conns = get_other_cells(muxsel, index, count_mux); pool<Cell*> muxsel_conns = get_other_cells(muxsel, index, count_mux);
Cell* underflow_inv = NULL; Cell* underflow_inv = NULL;
for(auto c : muxsel_conns) for(auto c : muxsel_conns)
{ {
if(c->type != "$logic_not") if(c->type != "$logic_not")
continue; continue;
if(!is_full_bus(muxsel, index, c, "\\Y", count_mux, "\\S", true)) if(!is_full_bus(muxsel, index, c, "\\Y", count_mux, "\\S", true))
continue; continue;
underflow_inv = c; underflow_inv = c;
break; break;
} }
if(underflow_inv == NULL) if(underflow_inv == NULL)
return 13; return 13;
extract.underflow_inv = underflow_inv; extract.underflow_inv = underflow_inv;
//Y connection of the mux must have exactly one load, the counter's internal register //Y connection of the mux must have exactly one load, the counter's internal register
const RTLIL::SigSpec muxy = sigmap(count_mux->getPort("\\Y")); const RTLIL::SigSpec muxy = sigmap(count_mux->getPort("\\Y"));
pool<Cell*> muxy_loads = get_other_cells(muxy, index, count_mux); pool<Cell*> muxy_loads = get_other_cells(muxy, index, count_mux);
@ -193,14 +193,14 @@ int greenpak4_counters_tryextract(ModIndex& index, Cell *cell, CounterExtraction
else if(count_reg->type == "$adff") else if(count_reg->type == "$adff")
{ {
extract.has_reset = true; extract.has_reset = true;
//Verify ARST_VALUE is zero and ARST_POLARITY is 1 //Verify ARST_VALUE is zero and ARST_POLARITY is 1
//TODO: infer an inverter to make it 1 if necessary, so we can support negative level resets? //TODO: infer an inverter to make it 1 if necessary, so we can support negative level resets?
if(count_reg->getParam("\\ARST_POLARITY").as_int() != 1) if(count_reg->getParam("\\ARST_POLARITY").as_int() != 1)
return 22; return 22;
if(count_reg->getParam("\\ARST_VALUE").as_int() != 0) if(count_reg->getParam("\\ARST_VALUE").as_int() != 0)
return 23; return 23;
//Save the reset //Save the reset
extract.rst = sigmap(count_reg->getPort("\\ARST")); extract.rst = sigmap(count_reg->getPort("\\ARST"));
} }
@ -209,9 +209,9 @@ int greenpak4_counters_tryextract(ModIndex& index, Cell *cell, CounterExtraction
return 15; return 15;
if(!is_full_bus(muxy, index, count_mux, "\\Y", count_reg, "\\D")) if(!is_full_bus(muxy, index, count_mux, "\\Y", count_reg, "\\D"))
return 16; return 16;
//TODO: Verify count_reg CLK_POLARITY is 1 //TODO: Verify count_reg CLK_POLARITY is 1
//Register output must have exactly two loads, the inverter and ALU //Register output must have exactly two loads, the inverter and ALU
const RTLIL::SigSpec cnout = sigmap(count_reg->getPort("\\Q")); const RTLIL::SigSpec cnout = sigmap(count_reg->getPort("\\Q"));
pool<Cell*> cnout_loads = get_other_cells(cnout, index, count_reg); pool<Cell*> cnout_loads = get_other_cells(cnout, index, count_reg);
@ -221,10 +221,10 @@ int greenpak4_counters_tryextract(ModIndex& index, Cell *cell, CounterExtraction
return 18; return 18;
if(!is_full_bus(cnout, index, count_reg, "\\Q", cell, "\\A", true)) if(!is_full_bus(cnout, index, count_reg, "\\Q", cell, "\\A", true))
return 19; return 19;
//Look up the clock from the register //Look up the clock from the register
extract.clk = sigmap(count_reg->getPort("\\CLK")); extract.clk = sigmap(count_reg->getPort("\\CLK"));
//Register output net must have an INIT attribute equal to the count value //Register output net must have an INIT attribute equal to the count value
extract.rwire = cnout.as_wire(); extract.rwire = cnout.as_wire();
if(extract.rwire->attributes.find("\\init") == extract.rwire->attributes.end()) if(extract.rwire->attributes.find("\\init") == extract.rwire->attributes.end())
@ -232,7 +232,7 @@ int greenpak4_counters_tryextract(ModIndex& index, Cell *cell, CounterExtraction
int rinit = extract.rwire->attributes["\\init"].as_int(); int rinit = extract.rwire->attributes["\\init"].as_int();
if(rinit != extract.count_value) if(rinit != extract.count_value)
return 21; return 21;
return 0; return 0;
} }
@ -243,11 +243,11 @@ void greenpak4_counters_worker(
pool<Cell*>& cells_to_remove) pool<Cell*>& cells_to_remove)
{ {
SigMap& sigmap = index.sigmap; SigMap& sigmap = index.sigmap;
//Core of the counter must be an ALU //Core of the counter must be an ALU
if (cell->type != "$alu") if (cell->type != "$alu")
return; return;
//A input is the count value. Check if it has COUNT_EXTRACT set. //A input is the count value. Check if it has COUNT_EXTRACT set.
//If it's not a wire, don't even try //If it's not a wire, don't even try
auto port = sigmap(cell->getPort("\\A")); auto port = sigmap(cell->getPort("\\A"));
@ -268,7 +268,7 @@ void greenpak4_counters_worker(
log_id(a_wire), log_id(a_wire),
count_reg_src.c_str(), count_reg_src.c_str(),
extract_value.c_str()); extract_value.c_str());
if(extract_value == "FORCE") if(extract_value == "FORCE")
force_extract = true; force_extract = true;
else if(extract_value == "NO") else if(extract_value == "NO")
@ -280,15 +280,15 @@ void greenpak4_counters_worker(
extract_value.c_str()); extract_value.c_str());
} }
} }
//If we're explicitly told not to extract, don't infer a counter //If we're explicitly told not to extract, don't infer a counter
if(never_extract) if(never_extract)
return; return;
//Attempt to extract a counter //Attempt to extract a counter
CounterExtraction extract; CounterExtraction extract;
int reason = greenpak4_counters_tryextract(index, cell, extract); int reason = greenpak4_counters_tryextract(index, cell, extract);
//Nonzero code - we could not find a matchable counter. //Nonzero code - we could not find a matchable counter.
//Do nothing, unless extraction was forced in which case give an error //Do nothing, unless extraction was forced in which case give an error
if(reason != 0) if(reason != 0)
@ -320,7 +320,7 @@ void greenpak4_counters_worker(
"Reset polarity is not positive", //22 "Reset polarity is not positive", //22
"Reset is not to zero" //23 "Reset is not to zero" //23
}; };
if(force_extract) if(force_extract)
{ {
log_error( log_error(
@ -330,12 +330,12 @@ void greenpak4_counters_worker(
} }
return; return;
} }
//Figure out the final cell type based on the counter size //Figure out the final cell type based on the counter size
string celltype = "\\GP_COUNT8"; string celltype = "\\GP_COUNT8";
if(extract.width > 8) if(extract.width > 8)
celltype = "\\GP_COUNT14"; celltype = "\\GP_COUNT14";
//Log it //Log it
total_counters ++; total_counters ++;
string reset_type = "non-resettable"; string reset_type = "non-resettable";
@ -350,7 +350,7 @@ void greenpak4_counters_worker(
extract.count_value, extract.count_value,
log_id(extract.rwire->name), log_id(extract.rwire->name),
count_reg_src.c_str()); count_reg_src.c_str());
//Wipe all of the old connections to the ALU //Wipe all of the old connections to the ALU
cell->unsetPort("\\A"); cell->unsetPort("\\A");
cell->unsetPort("\\B"); cell->unsetPort("\\B");
@ -367,7 +367,7 @@ void greenpak4_counters_worker(
//Change the cell type //Change the cell type
cell->type = celltype; cell->type = celltype;
//Hook up resets //Hook up resets
if(extract.has_reset) if(extract.has_reset)
{ {
@ -380,14 +380,14 @@ void greenpak4_counters_worker(
cell->setParam("\\RESET_MODE", RTLIL::Const("RISING")); cell->setParam("\\RESET_MODE", RTLIL::Const("RISING"));
cell->setPort("\\RST", RTLIL::SigSpec(false)); cell->setPort("\\RST", RTLIL::SigSpec(false));
} }
//Hook up other stuff //Hook up other stuff
cell->setParam("\\CLKIN_DIVIDE", RTLIL::Const(1)); cell->setParam("\\CLKIN_DIVIDE", RTLIL::Const(1));
cell->setParam("\\COUNT_TO", RTLIL::Const(extract.count_value)); cell->setParam("\\COUNT_TO", RTLIL::Const(extract.count_value));
cell->setPort("\\CLK", extract.clk); cell->setPort("\\CLK", extract.clk);
cell->setPort("\\OUT", extract.outsig); cell->setPort("\\OUT", extract.outsig);
//Delete the cells we've replaced (let opt_clean handle deleting the now-redundant wires) //Delete the cells we've replaced (let opt_clean handle deleting the now-redundant wires)
cells_to_remove.insert(extract.count_mux); cells_to_remove.insert(extract.count_mux);
cells_to_remove.insert(extract.count_reg); cells_to_remove.insert(extract.count_reg);
@ -409,7 +409,7 @@ struct Greenpak4CountersPass : public Pass {
virtual void execute(std::vector<std::string> args, RTLIL::Design *design) virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
{ {
log_header(design, "Executing GREENPAK4_COUNTERS pass (mapping counters to hard IP blocks).\n"); log_header(design, "Executing GREENPAK4_COUNTERS pass (mapping counters to hard IP blocks).\n");
size_t argidx; size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++) for (argidx = 1; argidx < args.size(); argidx++)
{ {
@ -419,21 +419,21 @@ struct Greenpak4CountersPass : public Pass {
break; break;
} }
extra_args(args, argidx, design); extra_args(args, argidx, design);
//Extract all of the counters we could find //Extract all of the counters we could find
unsigned int total_counters = 0; unsigned int total_counters = 0;
for (auto module : design->selected_modules()) for (auto module : design->selected_modules())
{ {
pool<Cell*> cells_to_remove; pool<Cell*> cells_to_remove;
ModIndex index(module); ModIndex index(module);
for (auto cell : module->selected_cells()) for (auto cell : module->selected_cells())
greenpak4_counters_worker(index, cell, total_counters, cells_to_remove); greenpak4_counters_worker(index, cell, total_counters, cells_to_remove);
for(auto cell : cells_to_remove) for(auto cell : cells_to_remove)
module->remove(cell); module->remove(cell);
} }
if(total_counters) if(total_counters)
log("Extracted %u counters\n", total_counters); log("Extracted %u counters\n", total_counters);
} }

2
tests/simple/graphtest.v
View File

@ -25,7 +25,7 @@ assign Z[7:4] = {1'b0, B[2:0]}; // Concat of CV and PI connect to PO
always @* begin always @* begin
if (A == 4'b1111) begin // All-Const at port (eq) if (A == 4'b1111) begin // All-Const at port (eq)
X = B; X = B;
end end
else begin else begin
X = 4'b0000; // All-Const at port (mux) X = 4'b0000; // All-Const at port (mux)
end end