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synth_coolrunner2: remove

This commit is contained in:
Lofty 2026-08-17 15:28:52 +01:00
parent dbe5b7c03f
commit 541d240930
11 changed files with 0 additions and 1572 deletions
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5
docs/source/cmd/index_techlibs_coolrunner2.rst
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@ -1,5 +0,0 @@
CoolRunner-II
------------------
.. autocmdgroup:: techlibs/coolrunner2
:members:

1
techlibs/CMakeLists.txt
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@ -2,7 +2,6 @@ add_subdirectory(achronix)
add_subdirectory(analogdevices)
add_subdirectory(anlogic)
add_subdirectory(common)
add_subdirectory(coolrunner2)
add_subdirectory(easic)
add_subdirectory(efinix)
add_subdirectory(fabulous)

42
techlibs/coolrunner2/CMakeLists.txt
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@ -1,42 +0,0 @@
yosys_pass(coolrunner2_sop
coolrunner2_sop.cc
)
yosys_pass(coolrunner2_fixup
coolrunner2_fixup.cc
)
yosys_pass(synth_coolrunner2
synth_coolrunner2.cc
REQUIRES
abc
attrmvcp
blackbox
check
clean
coolrunner2_fixup
coolrunner2_sop
dffinit
dfflibmap
extract
extract_counter
flatten
hierarchy
iopadmap
opt
proc
read_verilog
splitnets
stat
synth
techmap
tribuf
write_json
DATA_DIR
coolrunner2
DATA_FILES
cells_latch.v
cells_sim.v
cells_counter_map.v
tff_extract.v
xc2_dff.lib
)

162
techlibs/coolrunner2/cells_counter_map.v
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@ -1,162 +0,0 @@
module \$__COUNT_ (CE, CLK, OUT, POUT, RST, UP);
input wire CE;
input wire CLK;
output wire OUT;
(* force_downto *)
output wire[WIDTH-1:0] POUT;
input wire RST;
input wire UP;
parameter COUNT_TO = 1;
parameter RESET_MODE = "RISING";
parameter RESET_TO_MAX = 0;
parameter HAS_POUT = 0;
parameter HAS_CE = 0;
parameter WIDTH = 8;
parameter DIRECTION = "DOWN";
if (DIRECTION == "UP") begin
if (WIDTH < 2) begin
initial begin
$display("ERROR: \$__COUNT_ must be at least 2 bits wide (bug in extract_counter pass?).");
$finish;
end
end
// FIXME: Max width?
assign OUT = POUT == COUNT_TO;
if (HAS_CE) begin
genvar i;
for (i = 0; i < WIDTH; i++) begin: countbits
// each bit = (cur & !reset) ^ (all prev & !reset)
wire xor_to_mc_bitn;
FDCP #(
.INIT(0)
) bitn_ff (
.C(CLK),
.CLR(0),
.D(xor_to_mc_bitn),
.PRE(0),
.Q(POUT[i])
);
wire orterm_to_xor_bitn;
wire pterm0_to_or_bitn;
wire pterm1_to_or_bitn;
MACROCELL_XOR #(
.INVERT_OUT(0)
) bitn_xor (
.IN_ORTERM(orterm_to_xor_bitn),
.IN_PTC(pterm1_to_or_bitn),
.OUT(xor_to_mc_bitn)
);
ORTERM #(
.WIDTH(1)
) bitn_or (
.IN(pterm0_to_or_bitn),
.OUT(orterm_to_xor_bitn)
);
ANDTERM #(
.COMP_INP(1),
.TRUE_INP(1)
) bitn_pterm0 (
.IN(POUT[i]),
.IN_B(OUT),
.OUT(pterm0_to_or_bitn)
);
ANDTERM #(
.COMP_INP(1),
.TRUE_INP(i + 1)
) bitn_pterm1 (
.IN({POUT[i-1:0], CE}),
.IN_B(OUT),
.OUT(pterm1_to_or_bitn)
);
end
end else begin
// Bit0 is special; toggle unless reset
// cur reset out
// 0 0 1
// 0 1 0
// 1 0 0
// 1 1 0
wire xor_to_mc_bit0;
FDCP #(
.INIT(0)
) bit0_ff (
.C(CLK),
.CLR(0),
.D(xor_to_mc_bit0),
.PRE(0),
.Q(POUT[0])
);
wire pterm_to_xor_bit0;
MACROCELL_XOR #(
.INVERT_OUT(0)
) bit0_xor (
.IN_PTC(pterm_to_xor_bit0),
.OUT(xor_to_mc_bit0)
);
ANDTERM #(
.COMP_INP(2),
.TRUE_INP(0)
) bit0_pterm (
.IN(),
.IN_B({POUT[0], OUT}),
.OUT(pterm_to_xor_bit0)
);
genvar i;
for (i = 1; i < WIDTH; i++) begin: countbits
// each bit = (cur & !reset) ^ (all prev & !reset)
wire xor_to_mc_bitn;
FDCP #(
.INIT(0)
) bitn_ff (
.C(CLK),
.CLR(0),
.D(xor_to_mc_bitn),
.PRE(0),
.Q(POUT[i])
);
wire orterm_to_xor_bitn;
wire pterm0_to_or_bitn;
wire pterm1_to_or_bitn;
MACROCELL_XOR #(
.INVERT_OUT(0)
) bitn_xor (
.IN_ORTERM(orterm_to_xor_bitn),
.IN_PTC(pterm1_to_or_bitn),
.OUT(xor_to_mc_bitn)
);
ORTERM #(
.WIDTH(1)
) bitn_or (
.IN(pterm0_to_or_bitn),
.OUT(orterm_to_xor_bitn)
);
ANDTERM #(
.COMP_INP(1),
.TRUE_INP(1)
) bitn_pterm0 (
.IN(POUT[i]),
.IN_B(OUT),
.OUT(pterm0_to_or_bitn)
);
ANDTERM #(
.COMP_INP(1),
.TRUE_INP(i)
) bitn_pterm1 (
.IN(POUT[i-1:0]),
.IN_B(OUT),
.OUT(pterm1_to_or_bitn)
);
end
end
end
// FIXME: down counters
endmodule

19
techlibs/coolrunner2/cells_latch.v
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@ -1,19 +0,0 @@
module $_DLATCH_P_(input E, input D, output Q);
LDCP _TECHMAP_REPLACE_ (
.D(D),
.G(E),
.Q(Q),
.PRE(1'b0),
.CLR(1'b0)
);
endmodule
module $_DLATCH_N_(input E, input D, output Q);
LDCP_N _TECHMAP_REPLACE_ (
.D(D),
.G(E),
.Q(Q),
.PRE(1'b0),
.CLR(1'b0)
);
endmodule

310
techlibs/coolrunner2/cells_sim.v
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@ -1,310 +0,0 @@
module IBUF(input I, output O);
assign O = I;
endmodule
module IOBUFE(input I, input E, output O, inout IO);
assign O = IO;
assign IO = E ? I : 1'bz;
endmodule
module ANDTERM(IN, IN_B, OUT);
parameter TRUE_INP = 0;
parameter COMP_INP = 0;
input [TRUE_INP-1:0] IN;
input [COMP_INP-1:0] IN_B;
output reg OUT;
integer i;
always @(*) begin
OUT = 1;
for (i = 0; i < TRUE_INP; i=i+1)
OUT = OUT & IN[i];
for (i = 0; i < COMP_INP; i=i+1)
OUT = OUT & ~IN_B[i];
end
endmodule
module ORTERM(IN, OUT);
parameter WIDTH = 0;
input [WIDTH-1:0] IN;
output reg OUT;
integer i;
always @(*) begin
OUT = 0;
for (i = 0; i < WIDTH; i=i+1) begin
OUT = OUT | IN[i];
end
end
endmodule
module MACROCELL_XOR(IN_PTC, IN_ORTERM, OUT);
parameter INVERT_OUT = 0;
input IN_PTC;
input IN_ORTERM;
output wire OUT;
wire xor_intermed;
assign OUT = INVERT_OUT ? ~xor_intermed : xor_intermed;
assign xor_intermed = IN_ORTERM ^ IN_PTC;
endmodule
module FDCP (C, PRE, CLR, D, Q);
parameter INIT = 0;
input C, PRE, CLR, D;
output reg Q;
initial begin
Q <= INIT;
end
always @(posedge C, posedge PRE, posedge CLR) begin
if (CLR == 1)
Q <= 0;
else if (PRE == 1)
Q <= 1;
else
Q <= D;
end
endmodule
module FDCP_N (C, PRE, CLR, D, Q);
parameter INIT = 0;
input C, PRE, CLR, D;
output reg Q;
initial begin
Q <= INIT;
end
always @(negedge C, posedge PRE, posedge CLR) begin
if (CLR == 1)
Q <= 0;
else if (PRE == 1)
Q <= 1;
else
Q <= D;
end
endmodule
module LDCP (G, PRE, CLR, D, Q);
parameter INIT = 0;
input G, PRE, CLR, D;
output reg Q;
initial begin
Q <= INIT;
end
always @* begin
if (CLR == 1)
Q <= 0;
else if (G == 1)
Q <= D;
else if (PRE == 1)
Q <= 1;
end
endmodule
module LDCP_N (G, PRE, CLR, D, Q);
parameter INIT = 0;
input G, PRE, CLR, D;
output reg Q;
initial begin
Q <= INIT;
end
always @* begin
if (CLR == 1)
Q <= 0;
else if (G == 0)
Q <= D;
else if (PRE == 1)
Q <= 1;
end
endmodule
module BUFG(I, O);
input I;
output O;
assign O = I;
endmodule
module BUFGSR(I, O);
parameter INVERT = 0;
input I;
output O;
assign O = INVERT ? ~I : I;
endmodule
module BUFGTS(I, O);
parameter INVERT = 0;
input I;
output O;
assign O = INVERT ? ~I : I;
endmodule
module FDDCP (C, PRE, CLR, D, Q);
parameter INIT = 0;
input C, PRE, CLR, D;
output reg Q;
initial begin
Q <= INIT;
end
always @(posedge C, negedge C, posedge PRE, posedge CLR) begin
if (CLR == 1)
Q <= 0;
else if (PRE == 1)
Q <= 1;
else
Q <= D;
end
endmodule
module FTCP (C, PRE, CLR, T, Q);
parameter INIT = 0;
input C, PRE, CLR, T;
output wire Q;
reg Q_;
initial begin
Q_ <= INIT;
end
always @(posedge C, posedge PRE, posedge CLR) begin
if (CLR == 1)
Q_ <= 0;
else if (PRE == 1)
Q_ <= 1;
else if (T == 1)
Q_ <= ~Q_;
end
assign Q = Q_;
endmodule
module FTCP_N (C, PRE, CLR, T, Q);
parameter INIT = 0;
input C, PRE, CLR, T;
output wire Q;
reg Q_;
initial begin
Q_ <= INIT;
end
always @(negedge C, posedge PRE, posedge CLR) begin
if (CLR == 1)
Q_ <= 0;
else if (PRE == 1)
Q_ <= 1;
else if (T == 1)
Q_ <= ~Q_;
end
assign Q = Q_;
endmodule
module FTDCP (C, PRE, CLR, T, Q);
parameter INIT = 0;
input C, PRE, CLR, T;
output wire Q;
reg Q_;
initial begin
Q_ <= INIT;
end
always @(posedge C, negedge C, posedge PRE, posedge CLR) begin
if (CLR == 1)
Q_ <= 0;
else if (PRE == 1)
Q_ <= 1;
else if (T == 1)
Q_ <= ~Q_;
end
assign Q = Q_;
endmodule
module FDCPE (C, PRE, CLR, D, Q, CE);
parameter INIT = 0;
input C, PRE, CLR, D, CE;
output reg Q;
initial begin
Q <= INIT;
end
always @(posedge C, posedge PRE, posedge CLR) begin
if (CLR == 1)
Q <= 0;
else if (PRE == 1)
Q <= 1;
else if (CE == 1)
Q <= D;
end
endmodule
module FDCPE_N (C, PRE, CLR, D, Q, CE);
parameter INIT = 0;
input C, PRE, CLR, D, CE;
output reg Q;
initial begin
Q <= INIT;
end
always @(negedge C, posedge PRE, posedge CLR) begin
if (CLR == 1)
Q <= 0;
else if (PRE == 1)
Q <= 1;
else if (CE == 1)
Q <= D;
end
endmodule
module FDDCPE (C, PRE, CLR, D, Q, CE);
parameter INIT = 0;
input C, PRE, CLR, D, CE;
output reg Q;
initial begin
Q <= INIT;
end
always @(posedge C, negedge C, posedge PRE, posedge CLR) begin
if (CLR == 1)
Q <= 0;
else if (PRE == 1)
Q <= 1;
else if (CE == 1)
Q <= D;
end
endmodule

520
techlibs/coolrunner2/coolrunner2_fixup.cc
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@ -1,520 +0,0 @@
/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2020 R. Ou <rqou@robertou.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "kernel/yosys.h"
#include "kernel/sigtools.h"
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
RTLIL::Wire *makexorbuffer(RTLIL::Module *module, SigBit inwire, const char *cellname)
{
RTLIL::Wire *outwire = nullptr;
if (inwire == SigBit(true))
{
// Constant 1
outwire = module->addWire(
module->uniquify(stringf("$xc2fix$%s_BUF1_XOR_OUT", cellname)));
auto xor_cell = module->addCell(
module->uniquify(stringf("$xc2fix$%s_BUF1_XOR", cellname)),
ID(MACROCELL_XOR));
xor_cell->setParam(ID(INVERT_OUT), true);
xor_cell->setPort(ID(OUT), outwire);
}
else if (inwire == SigBit(false))
{
// Constant 0
outwire = module->addWire(
module->uniquify(stringf("$xc2fix$%s_BUF0_XOR_OUT", cellname)));
auto xor_cell = module->addCell(
module->uniquify(stringf("$xc2fix$%s_BUF0_XOR", cellname)),
ID(MACROCELL_XOR));
xor_cell->setParam(ID(INVERT_OUT), false);
xor_cell->setPort(ID(OUT), outwire);
}
else if (inwire == SigBit(RTLIL::State::Sx))
{
// x; treat as 0
log_warning("While buffering, changing x to 0 into cell %s\n", cellname);
outwire = module->addWire(
module->uniquify(stringf("$xc2fix$%s_BUF0_XOR_OUT", cellname)));
auto xor_cell = module->addCell(
module->uniquify(stringf("$xc2fix$%s_BUF0_XOR", cellname)),
ID(MACROCELL_XOR));
xor_cell->setParam(ID(INVERT_OUT), false);
xor_cell->setPort(ID(OUT), outwire);
}
else
{
auto inwire_name = inwire.wire->name.c_str();
outwire = module->addWire(
module->uniquify(stringf("$xc2fix$%s_BUF_XOR_OUT", inwire_name)));
auto and_to_xor_wire = module->addWire(
module->uniquify(stringf("$xc2fix$%s_BUF_AND_OUT", inwire_name)));
auto and_cell = module->addCell(
module->uniquify(stringf("$xc2fix$%s_BUF_AND", inwire_name)),
ID(ANDTERM));
and_cell->setParam(ID(TRUE_INP), 1);
and_cell->setParam(ID(COMP_INP), 0);
and_cell->setPort(ID(OUT), and_to_xor_wire);
and_cell->setPort(ID(IN), inwire);
and_cell->setPort(ID(IN_B), SigSpec());
auto xor_cell = module->addCell(
module->uniquify(stringf("$xc2fix$%s_BUF_XOR", inwire_name)),
ID(MACROCELL_XOR));
xor_cell->setParam(ID(INVERT_OUT), false);
xor_cell->setPort(ID(IN_PTC), and_to_xor_wire);
xor_cell->setPort(ID(OUT), outwire);
}
return outwire;
}
RTLIL::Wire *makeptermbuffer(RTLIL::Module *module, SigBit inwire)
{
auto inwire_name = inwire.wire->name.c_str();
auto outwire = module->addWire(
module->uniquify(stringf("$xc2fix$%s_BUF_AND_OUT", inwire_name)));
auto and_cell = module->addCell(
module->uniquify(stringf("$xc2fix$%s_BUF_AND", inwire_name)),
ID(ANDTERM));
and_cell->setParam(ID(TRUE_INP), 1);
and_cell->setParam(ID(COMP_INP), 0);
and_cell->setPort(ID(OUT), outwire);
and_cell->setPort(ID(IN), inwire);
and_cell->setPort(ID(IN_B), SigSpec());
return outwire;
}
struct Coolrunner2FixupPass : public Pass {
Coolrunner2FixupPass() : Pass("coolrunner2_fixup", "insert necessary buffer cells for CoolRunner-II architecture") { }
void help() override
{
log("\n");
log(" coolrunner2_fixup [options] [selection]\n");
log("\n");
log("Insert necessary buffer cells for CoolRunner-II architecture.\n");
log("\n");
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
{
log_header(design, "Executing COOLRUNNER2_FIXUP pass (insert necessary buffer cells for CoolRunner-II architecture).\n");
extra_args(args, 1, design);
for (auto module : design->selected_modules())
{
SigMap sigmap(module);
// Find all the FF outputs
pool<SigBit> sig_fed_by_ff;
for (auto cell : module->selected_cells())
{
if (cell->type.in(ID(FDCP), ID(FDCP_N), ID(FDDCP), ID(LDCP), ID(LDCP_N),
ID(FTCP), ID(FTCP_N), ID(FTDCP), ID(FDCPE), ID(FDCPE_N), ID(FDDCPE)))
{
auto output = sigmap(cell->getPort(ID::Q)[0]);
sig_fed_by_ff.insert(output);
}
}
// Find all the XOR outputs
pool<SigBit> sig_fed_by_xor;
for (auto cell : module->selected_cells())
{
if (cell->type == ID(MACROCELL_XOR))
{
auto output = sigmap(cell->getPort(ID(OUT))[0]);
sig_fed_by_xor.insert(output);
}
}
// Find all the input/inout outputs
pool<SigBit> sig_fed_by_io;
for (auto cell : module->selected_cells())
{
if (cell->type.in(ID(IBUF), ID(IOBUFE)))
{
if (cell->hasPort(ID::O)) {
auto output = sigmap(cell->getPort(ID::O)[0]);
sig_fed_by_io.insert(output);
}
}
}
// Find all the pterm outputs
pool<SigBit> sig_fed_by_pterm;
for (auto cell : module->selected_cells())
{
if (cell->type == ID(ANDTERM))
{
auto output = sigmap(cell->getPort(ID(OUT))[0]);
sig_fed_by_pterm.insert(output);
}
}
// Find all the bufg outputs
pool<SigBit> sig_fed_by_bufg;
for (auto cell : module->selected_cells())
{
if (cell->type == ID(BUFG))
{
auto output = sigmap(cell->getPort(ID::O)[0]);
sig_fed_by_bufg.insert(output);
}
}
// Find all the bufgsr outputs
pool<SigBit> sig_fed_by_bufgsr;
for (auto cell : module->selected_cells())
{
if (cell->type == ID(BUFGSR))
{
auto output = sigmap(cell->getPort(ID::O)[0]);
sig_fed_by_bufgsr.insert(output);
}
}
// Find all the bufgts outputs
pool<SigBit> sig_fed_by_bufgts;
for (auto cell : module->selected_cells())
{
if (cell->type == ID(BUFGTS))
{
auto output = sigmap(cell->getPort(ID::O)[0]);
sig_fed_by_bufgts.insert(output);
}
}
// This is used to fix the input -> FF -> output scenario
pool<SigBit> sig_fed_by_ibuf;
for (auto cell : module->selected_cells())
{
if (cell->type == ID(IBUF))
{
auto output = sigmap(cell->getPort(ID::O)[0]);
sig_fed_by_ibuf.insert(output);
}
}
// Find all of the sinks for each output from an IBUF
dict<SigBit, std::pair<int, RTLIL::Cell *>> ibuf_fanouts;
for (auto cell : module->selected_cells())
{
for (auto &conn : cell->connections())
{
if (cell->input(conn.first))
{
for (auto wire_in : sigmap(conn.second))
{
if (sig_fed_by_ibuf[wire_in])
{
auto existing_count = ibuf_fanouts[wire_in].first;
ibuf_fanouts[wire_in] =
std::pair<int, RTLIL::Cell *>(existing_count + 1, cell);
}
}
}
}
}
dict<SigBit, RTLIL::Cell *> ibuf_out_to_packed_reg_cell;
pool<SigBit> packed_reg_out;
for (auto x : ibuf_fanouts)
{
auto ibuf_out_wire = x.first;
auto fanout_count = x.second.first;
auto maybe_ff_cell = x.second.second;
// The register can be packed with the IBUF only if it's
// actually a register and it's the only fanout. Otherwise,
// the pad-to-zia path has to be used up and the register
// can't be packed with the ibuf.
if (fanout_count == 1 && maybe_ff_cell->type.in(
ID(FDCP), ID(FDCP_N), ID(FDDCP), ID(LDCP), ID(LDCP_N),
ID(FTCP), ID(FTCP_N), ID(FTDCP), ID(FDCPE), ID(FDCPE_N), ID(FDDCPE)))
{
SigBit input;
if (maybe_ff_cell->type.in(ID(FTCP), ID(FTCP_N), ID(FTDCP)))
input = sigmap(maybe_ff_cell->getPort(ID::T)[0]);
else
input = sigmap(maybe_ff_cell->getPort(ID::D)[0]);
SigBit output = sigmap(maybe_ff_cell->getPort(ID::Q)[0]);
if (input == ibuf_out_wire)
{
log("Found IBUF %s that can be packed with FF %s (type %s)\n",
ibuf_out_wire.wire->name.c_str(),
maybe_ff_cell->name.c_str(),
maybe_ff_cell->type.c_str());
ibuf_out_to_packed_reg_cell[ibuf_out_wire] = maybe_ff_cell;
packed_reg_out.insert(output);
}
}
}
for (auto cell : module->selected_cells())
{
if (cell->type.in(ID(FDCP), ID(FDCP_N), ID(FDDCP), ID(LDCP), ID(LDCP_N),
ID(FTCP), ID(FTCP_N), ID(FTDCP), ID(FDCPE), ID(FDCPE_N), ID(FDDCPE)))
{
// Buffering FF inputs. FF inputs can only come from either
// an IO pin or from an XOR. Otherwise AND/XOR cells need
// to be inserted.
SigBit input;
if (cell->type.in(ID(FTCP), ID(FTCP_N), ID(FTDCP)))
input = sigmap(cell->getPort(ID::T)[0]);
else
input = sigmap(cell->getPort(ID::D)[0]);
// If the input wasn't an XOR nor an IO, then a buffer
// definitely needs to be added.
// Otherwise, if it is an IO, only leave unbuffered
// if we're being packed with the IO.
if ((!sig_fed_by_xor[input] && !sig_fed_by_io[input]) ||
(sig_fed_by_io[input] && ibuf_out_to_packed_reg_cell[input] != cell))
{
log("Buffering input to \"%s\"\n", cell->name);
auto xor_to_ff_wire = makexorbuffer(module, input, cell->name.c_str());
if (cell->type.in(ID(FTCP), ID(FTCP_N), ID(FTDCP)))
cell->setPort(ID::T, xor_to_ff_wire);
else
cell->setPort(ID::D, xor_to_ff_wire);
}
// Buffering FF clocks. FF clocks can only come from either
// a pterm or a bufg. In some cases this will be handled
// in coolrunner2_sop (e.g. if clock is generated from
// AND-ing two signals) but not in all cases.
SigBit clock;
if (cell->type.in(ID(LDCP), ID(LDCP_N)))
clock = sigmap(cell->getPort(ID::G)[0]);
else
clock = sigmap(cell->getPort(ID::C)[0]);
if (!sig_fed_by_pterm[clock] && !sig_fed_by_bufg[clock])
{
log("Buffering clock to \"%s\"\n", cell->name);
auto pterm_to_ff_wire = makeptermbuffer(module, clock);
if (cell->type.in(ID(LDCP), ID(LDCP_N)))
cell->setPort(ID::G, pterm_to_ff_wire);
else
cell->setPort(ID::C, pterm_to_ff_wire);
}
// Buffering FF set/reset. This can only come from either
// a pterm or a bufgsr.
SigBit set;
set = sigmap(cell->getPort(ID(PRE))[0]);
if (set != SigBit(false))
{
if (!sig_fed_by_pterm[set] && !sig_fed_by_bufgsr[set])
{
log("Buffering set to \"%s\"\n", cell->name);
auto pterm_to_ff_wire = makeptermbuffer(module, set);
cell->setPort(ID(PRE), pterm_to_ff_wire);
}
}
SigBit reset;
reset = sigmap(cell->getPort(ID::CLR)[0]);
if (reset != SigBit(false))
{
if (!sig_fed_by_pterm[reset] && !sig_fed_by_bufgsr[reset])
{
log("Buffering reset to \"%s\"\n", cell->name);
auto pterm_to_ff_wire = makeptermbuffer(module, reset);
cell->setPort(ID::CLR, pterm_to_ff_wire);
}
}
// Buffering FF clock enable
// FIXME: This doesn't fully fix PTC conflicts
// FIXME: Need to ensure constant enables are optimized out
if (cell->type.in(ID(FDCPE), ID(FDCPE_N), ID(FDDCPE)))
{
SigBit ce;
ce = sigmap(cell->getPort(ID(CE))[0]);
if (!sig_fed_by_pterm[ce])
{
log("Buffering clock enable to \"%s\"\n", cell->name);
auto pterm_to_ff_wire = makeptermbuffer(module, ce);
cell->setPort(ID(CE), pterm_to_ff_wire);
}
}
}
}
for (auto cell : module->selected_cells())
{
if (cell->type == ID(IOBUFE))
{
// Buffer IOBUFE inputs. This can only be fed from an XOR or FF.
SigBit input = sigmap(cell->getPort(ID::I)[0]);
if ((!sig_fed_by_xor[input] && !sig_fed_by_ff[input]) ||
packed_reg_out[input])
{
log("Buffering input to \"%s\"\n", cell->name);
auto xor_to_io_wire = makexorbuffer(module, input, cell->name.c_str());
cell->setPort(ID::I, xor_to_io_wire);
}
// Buffer IOBUFE enables. This can only be fed from a pterm
// or a bufgts.
if (cell->hasPort(ID::E))
{
SigBit oe;
oe = sigmap(cell->getPort(ID::E)[0]);
if (!sig_fed_by_pterm[oe] && !sig_fed_by_bufgts[oe])
{
log("Buffering output enable to \"%s\"\n", cell->name);
auto pterm_to_oe_wire = makeptermbuffer(module, oe);
cell->setPort(ID::E, pterm_to_oe_wire);
}
}
}
}
// Now we have to fix up some cases where shared logic can
// cause XORs to have multiple fanouts to something other than
// pterms (which is not ok)
// Find all the XOR outputs
dict<SigBit, RTLIL::Cell *> xor_out_to_xor_cell;
for (auto cell : module->selected_cells())
{
if (cell->type == ID(MACROCELL_XOR))
{
auto output = sigmap(cell->getPort(ID(OUT))[0]);
xor_out_to_xor_cell[output] = cell;
}
}
// Find all of the sinks for each output from an XOR
pool<SigBit> xor_fanout_once;
for (auto cell : module->selected_cells())
{
if (cell->type == ID(ANDTERM))
continue;
for (auto &conn : cell->connections())
{
if (cell->input(conn.first))
{
for (auto wire_in : sigmap(conn.second))
{
auto xor_cell = xor_out_to_xor_cell[wire_in];
if (xor_cell)
{
if (xor_fanout_once[wire_in])
{
log("Additional fanout found for %s into %s (type %s), duplicating\n",
xor_cell->name.c_str(),
cell->name.c_str(),
cell->type.c_str());
auto new_xor_cell = module->addCell(
module->uniquify(xor_cell->name), xor_cell);
auto new_wire = module->addWire(
module->uniquify(wire_in.wire->name));
new_xor_cell->setPort(ID(OUT), new_wire);
cell->setPort(conn.first, new_wire);
}
xor_fanout_once.insert(wire_in);
}
}
}
}
}
// Do the same fanout fixing for OR terms. By doing this
// after doing XORs, both pieces will be duplicated when necessary.
// Find all the OR outputs
dict<SigBit, RTLIL::Cell *> or_out_to_or_cell;
for (auto cell : module->selected_cells())
{
if (cell->type == ID(ORTERM))
{
auto output = sigmap(cell->getPort(ID(OUT))[0]);
or_out_to_or_cell[output] = cell;
}
}
// Find all of the sinks for each output from an OR
pool<SigBit> or_fanout_once;
for (auto cell : module->selected_cells())
{
for (auto &conn : cell->connections())
{
if (cell->input(conn.first))
{
for (auto wire_in : sigmap(conn.second))
{
auto or_cell = or_out_to_or_cell[wire_in];
if (or_cell)
{
if (or_fanout_once[wire_in])
{
log("Additional fanout found for %s into %s (type %s), duplicating\n",
or_cell->name.c_str(),
cell->name.c_str(),
cell->type.c_str());
auto new_or_cell = module->addCell(
module->uniquify(or_cell->name), or_cell);
auto new_wire = module->addWire(
module->uniquify(wire_in.wire->name));
new_or_cell->setPort(ID(OUT), new_wire);
cell->setPort(conn.first, new_wire);
}
or_fanout_once.insert(wire_in);
}
}
}
}
}
}
}
} Coolrunner2FixupPass;
PRIVATE_NAMESPACE_END

234
techlibs/coolrunner2/coolrunner2_sop.cc
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@ -1,234 +0,0 @@
/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2017 Robert Ou <rqou@robertou.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "kernel/yosys.h"
#include "kernel/sigtools.h"
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
struct Coolrunner2SopPass : public Pass {
Coolrunner2SopPass() : Pass("coolrunner2_sop", "break $sop cells into ANDTERM/ORTERM cells") { }
void help() override
{
log("\n");
log(" coolrunner2_sop [options] [selection]\n");
log("\n");
log("Break $sop cells into ANDTERM/ORTERM cells.\n");
log("\n");
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
{
log_header(design, "Executing COOLRUNNER2_SOP pass (break $sop cells into ANDTERM/ORTERM cells).\n");
extra_args(args, 1, design);
for (auto module : design->selected_modules())
{
pool<Cell*> cells_to_remove;
SigMap sigmap(module);
// Find all the $_NOT_ cells
dict<SigBit, tuple<SigBit, Cell*>> not_cells;
for (auto cell : module->selected_cells())
{
if (cell->type == ID($_NOT_))
{
auto not_input = sigmap(cell->getPort(ID::A)[0]);
auto not_output = sigmap(cell->getPort(ID::Y)[0]);
not_cells[not_input] = tuple<SigBit, Cell*>(not_output, cell);
}
}
// Find wires that need to become special product terms
dict<SigBit, pool<tuple<Cell*, IdString>>> special_pterms_no_inv;
dict<SigBit, pool<tuple<Cell*, IdString>>> special_pterms_inv;
for (auto cell : module->selected_cells())
{
if (cell->type.in(ID(FDCP), ID(FDCP_N), ID(FDDCP), ID(FTCP), ID(FTCP_N), ID(FTDCP),
ID(FDCPE), ID(FDCPE_N), ID(FDDCPE), ID(LDCP), ID(LDCP_N)))
{
if (cell->hasPort(ID(PRE)))
special_pterms_no_inv[sigmap(cell->getPort(ID(PRE))[0])].insert(
make_tuple(cell, ID(PRE)));
if (cell->hasPort(ID::CLR))
special_pterms_no_inv[sigmap(cell->getPort(ID::CLR)[0])].insert(
make_tuple(cell, ID::CLR));
if (cell->hasPort(ID(CE)))
special_pterms_no_inv[sigmap(cell->getPort(ID(CE))[0])].insert(
make_tuple(cell, ID(CE)));
if (cell->hasPort(ID::C))
special_pterms_inv[sigmap(cell->getPort(ID::C)[0])].insert(
make_tuple(cell, ID::C));
if (cell->hasPort(ID::G))
special_pterms_inv[sigmap(cell->getPort(ID::G)[0])].insert(
make_tuple(cell, ID::G));
}
}
// Process $sop cells
for (auto cell : module->selected_cells())
{
if (cell->type == ID($sop))
{
// Read the inputs/outputs/parameters of the $sop cell
auto sop_inputs = sigmap(cell->getPort(ID::A));
auto sop_output = sigmap(cell->getPort(ID::Y))[0];
auto sop_depth = cell->getParam(ID::DEPTH).as_int();
auto sop_width = cell->getParam(ID::WIDTH).as_int();
auto sop_table = cell->getParam(ID::TABLE);
auto sop_output_wire_name = sop_output.wire->name.c_str();
// Check for a $_NOT_ at the output
bool has_invert = false;
if (not_cells.count(sop_output))
{
auto not_cell = not_cells.at(sop_output);
has_invert = true;
sop_output = std::get<0>(not_cell);
// remove the $_NOT_ cell because it gets folded into the xor
cells_to_remove.insert(std::get<1>(not_cell));
}
// Check for special P-term usage
bool is_special_pterm =
special_pterms_no_inv.count(sop_output) || special_pterms_inv.count(sop_output);
// Construct AND cells
pool<SigBit> intermed_wires;
for (int i = 0; i < sop_depth; i++) {
// Wire for the output
auto and_out = module->addWire(
module->uniquify(stringf("$xc2sop$%s_AND%d_OUT", sop_output_wire_name, i)));
intermed_wires.insert(and_out);
// Signals for the inputs
pool<SigBit> and_in_true;
pool<SigBit> and_in_comp;
for (int j = 0; j < sop_width; j++)
{
if (sop_table[2 * (i * sop_width + j) + 0])
{
and_in_comp.insert(sop_inputs[j]);
}
if (sop_table[2 * (i * sop_width + j) + 1])
{
and_in_true.insert(sop_inputs[j]);
}
}
// Construct the cell
auto and_cell = module->addCell(
module->uniquify(stringf("$xc2sop$%s_AND%d", sop_output_wire_name, i)),
ID(ANDTERM));
and_cell->setParam(ID(TRUE_INP), GetSize(and_in_true));
and_cell->setParam(ID(COMP_INP), GetSize(and_in_comp));
and_cell->setPort(ID(OUT), and_out);
and_cell->setPort(ID(IN), and_in_true);
and_cell->setPort(ID(IN_B), and_in_comp);
}
if (sop_depth == 1)
{
// If there is only one term, don't construct an OR cell. Directly construct the XOR gate
auto xor_cell = module->addCell(
module->uniquify(stringf("$xc2sop$%s_XOR", sop_output_wire_name)),
ID(MACROCELL_XOR));
xor_cell->setParam(ID(INVERT_OUT), has_invert);
xor_cell->setPort(ID(IN_PTC), *intermed_wires.begin());
xor_cell->setPort(ID(OUT), sop_output);
// Special P-term handling
if (is_special_pterm)
{
// Can always connect the P-term directly if it's going
// into something invert-capable
for (const auto &x : special_pterms_inv[sop_output])
{
std::get<0>(x)->setPort(std::get<1>(x), *intermed_wires.begin());
// If this signal is indeed inverted, flip the cell polarity
if (has_invert)
{
auto cell = std::get<0>(x);
if (cell->type == ID(FDCP)) cell->type = ID(FDCP_N);
else if (cell->type == ID(FDCP_N)) cell->type = ID(FDCP);
else if (cell->type == ID(FTCP)) cell->type = ID(FTCP_N);
else if (cell->type == ID(FTCP_N)) cell->type = ID(FTCP);
else if (cell->type == ID(FDCPE)) cell->type = ID(FDCPE_N);
else if (cell->type == ID(FDCPE_N)) cell->type = ID(FDCPE);
else if (cell->type == ID(LDCP)) cell->type = ID(LDCP_N);
else if (cell->type == ID(LDCP_N)) cell->type = ID(LDCP);
else log_assert(!"Internal error! Bad cell type!");
}
}
// If it's going into something that's not invert-capable,
// connect it directly only if this signal isn't inverted
if (!has_invert)
{
for (auto x : special_pterms_no_inv[sop_output])
std::get<0>(x)->setPort(std::get<1>(x), *intermed_wires.begin());
}
// Otherwise, a feedthrough P-term has to be created. Leave that to happen
// in the coolrunner2_fixup pass.
}
}
else
{
// Wire from OR to XOR
auto or_to_xor_wire = module->addWire(
module->uniquify(stringf("$xc2sop$%s_OR_OUT", sop_output_wire_name)));
// Construct the OR cell
auto or_cell = module->addCell(
module->uniquify(stringf("$xc2sop$%s_OR", sop_output_wire_name)),
ID(ORTERM));
or_cell->setParam(ID::WIDTH, sop_depth);
or_cell->setPort(ID(IN), intermed_wires);
or_cell->setPort(ID(OUT), or_to_xor_wire);
// Construct the XOR cell
auto xor_cell = module->addCell(
module->uniquify(stringf("$xc2sop$%s_XOR", sop_output_wire_name)),
ID(MACROCELL_XOR));
xor_cell->setParam(ID(INVERT_OUT), has_invert);
xor_cell->setPort(ID(IN_ORTERM), or_to_xor_wire);
xor_cell->setPort(ID(OUT), sop_output);
}
// Finally, remove the $sop cell
cells_to_remove.insert(cell);
}
}
// Actually do the removal now that we aren't iterating
for (auto cell : cells_to_remove)
{
module->remove(cell);
}
}
}
} Coolrunner2SopPass;
PRIVATE_NAMESPACE_END

207
techlibs/coolrunner2/synth_coolrunner2.cc
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@ -1,207 +0,0 @@
/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2017 Robert Ou <rqou@robertou.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "kernel/register.h"
#include "kernel/celltypes.h"
#include "kernel/rtlil.h"
#include "kernel/log.h"
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
struct SynthCoolrunner2Pass : public ScriptPass
{
SynthCoolrunner2Pass() : ScriptPass("synth_coolrunner2", "synthesis for Xilinx Coolrunner-II CPLDs") { }
void help() override
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" synth_coolrunner2 [options]\n");
log("\n");
log("This command runs synthesis for Coolrunner-II CPLDs. This work is experimental.\n");
log("It is intended to be used with https://github.com/azonenberg/openfpga as the\n");
log("place-and-route.\n");
log("\n");
log(" -top <module>\n");
log(" use the specified module as top module (default='top')\n");
log("\n");
log(" -json <file>\n");
log(" write the design to the specified JSON file. writing of an output file\n");
log(" is omitted if this parameter is not specified.\n");
log("\n");
log(" -run <from_label>:<to_label>\n");
log(" only run the commands between the labels (see below). an empty\n");
log(" from label is synonymous to 'begin', and empty to label is\n");
log(" synonymous to the end of the command list.\n");
log("\n");
log(" -noflatten\n");
log(" do not flatten design before synthesis\n");
log("\n");
log(" -retime\n");
log(" run 'abc' with '-dff -D 1' options\n");
log("\n");
log("\n");
log("The following commands are executed by this synthesis command:\n");
help_script();
log("\n");
}
string top_opt, json_file;
bool flatten, retime;
void clear_flags() override
{
top_opt = "-auto-top";
json_file = "";
flatten = true;
retime = false;
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
{
string run_from, run_to;
clear_flags();
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)
{
if (args[argidx] == "-top" && argidx+1 < args.size()) {
top_opt = "-top " + args[++argidx];
continue;
}
if (args[argidx] == "-json" && argidx+1 < args.size()) {
json_file = args[++argidx];
continue;
}
if (args[argidx] == "-run" && argidx+1 < args.size()) {
size_t pos = args[argidx+1].find(':');
if (pos == std::string::npos)
break;
run_from = args[++argidx].substr(0, pos);
run_to = args[argidx].substr(pos+1);
continue;
}
if (args[argidx] == "-noflatten") {
flatten = false;
continue;
}
if (args[argidx] == "-retime") {
retime = true;
continue;
}
break;
}
extra_args(args, argidx, design);
if (!design->full_selection())
log_cmd_error("This command only operates on fully selected designs!\n");
log_header(design, "Executing SYNTH_COOLRUNNER2 pass.\n");
log_push();
run_script(design, run_from, run_to);
log_pop();
}
void script() override
{
if (check_label("begin"))
{
run("read_verilog -lib +/coolrunner2/cells_sim.v");
run(stringf("hierarchy -check %s", help_mode ? "-top <top>" : top_opt));
}
if (flatten && check_label("flatten", "(unless -noflatten)"))
{
run("proc");
run("check");
run("flatten");
run("tribuf -logic");
}
if (check_label("coarse"))
{
run("synth -run coarse");
}
if (check_label("fine"))
{
run("extract_counter -dir up -allow_arst no");
run("techmap -map +/coolrunner2/cells_counter_map.v");
run("clean");
run("opt -fast -full");
run("techmap -map +/techmap.v -map +/coolrunner2/cells_latch.v");
run("opt -fast");
run("dfflibmap -prepare -liberty +/coolrunner2/xc2_dff.lib");
}
if (check_label("map_tff"))
{
// This is quite hacky. By telling abc that it can only use AND and XOR gates, abc will try and use XOR
// gates "whenever possible." This will hopefully cause toggle flip-flop structures to turn into an XOR
// connected to a D flip-flop. We then match on these and convert them into XC2 TFF cells.
run("abc -g AND,XOR");
run("clean");
run("extract -map +/coolrunner2/tff_extract.v");
}
if (check_label("map_pla"))
{
run("abc -sop -I 40 -P 56" + string(retime ? " -dff -D 1" : ""));
run("clean");
}
if (check_label("map_cells"))
{
run("dfflibmap -liberty +/coolrunner2/xc2_dff.lib");
run("dffinit -ff FDCP Q INIT");
run("dffinit -ff FDCP_N Q INIT");
run("dffinit -ff FTCP Q INIT");
run("dffinit -ff FTCP_N Q INIT");
run("dffinit -ff LDCP Q INIT");
run("dffinit -ff LDCP_N Q INIT");
run("coolrunner2_sop");
run("clean");
run("iopadmap -bits -inpad IBUF O:I -outpad IOBUFE I:IO -inoutpad IOBUFE O:IO -toutpad IOBUFE E:I:IO -tinoutpad IOBUFE E:O:I:IO");
run("attrmvcp -attr src -attr LOC t:IOBUFE n:*");
run("attrmvcp -attr src -attr LOC -driven t:IBUF n:*");
run("coolrunner2_fixup");
run("splitnets");
run("clean");
}
if (check_label("check"))
{
run("hierarchy -check");
run("stat");
run("check -noinit");
run("blackbox =A:whitebox");
}
if (check_label("json"))
{
if (!json_file.empty() || help_mode)
run(stringf("write_json %s", help_mode ? "<file-name>" : json_file));
}
}
} SynthCoolrunner2Pass;
PRIVATE_NAMESPACE_END

41
techlibs/coolrunner2/tff_extract.v
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@ -1,41 +0,0 @@
module FTCP (C, PRE, CLR, T, Q);
input C, PRE, CLR, T;
output wire Q;
wire xorout;
$_XOR_ xorgate (
.A(T),
.B(Q),
.Y(xorout),
);
$_DFFSR_PPP_ dff (
.C(C),
.D(xorout),
.Q(Q),
.S(PRE),
.R(CLR),
);
endmodule
module FTCP_N (C, PRE, CLR, T, Q);
input C, PRE, CLR, T;
output wire Q;
wire xorout;
$_XOR_ xorgate (
.A(T),
.B(Q),
.Y(xorout),
);
$_DFFSR_NPP_ dff (
.C(C),
.D(xorout),
.Q(Q),
.S(PRE),
.R(CLR),
);
endmodule

31
techlibs/coolrunner2/xc2_dff.lib
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library(xc2_dff) {
cell(FDCP) {
area: 1;
ff("IQ", "IQN") { clocked_on: C;
next_state: D;
clear: "CLR";
preset: "PRE"; }
pin(C) { direction: input;
clock: true; }
pin(D) { direction: input; }
pin(Q) { direction: output;
function: "IQ"; }
pin(CLR) { direction: input; }
pin(PRE) { direction: input; }
}
cell(FDCP_N) {
area: 1;
ff("IQ", "IQN") { clocked_on: "!C";
next_state: D;
clear: "CLR";
preset: "PRE"; }
pin(C) { direction: input;
clock: true; }
pin(D) { direction: input; }
pin(Q) { direction: output;
function: "IQ"; }
pin(CLR) { direction: input; }
pin(PRE) { direction: input; }
}
}