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yosys/techlibs/ecp5/synth_ecp5.cc

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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2012 Claire Xenia Wolf <claire@yosyshq.com>
* Copyright (C) 2018 gatecat <gatecat@ds0.me>
*
* 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 SynthEcp5Pass : public ScriptPass
{
SynthEcp5Pass() : ScriptPass("synth_ecp5", "synthesis for ECP5 FPGAs") { }
void on_register() override
{
RTLIL::constpad["synth_ecp5.abc9.W"] = "300";
}
void help() override
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" synth_ecp5 [options]\n");
log("\n");
log("This command runs synthesis for ECP5 FPGAs.\n");
log("\n");
log(" -top <module>\n");
log(" use the specified module as top module\n");
log("\n");
log(" -blif <file>\n");
log(" write the design to the specified BLIF file. writing of an output file\n");
log(" is omitted if this parameter is not specified.\n");
log("\n");
log(" -edif <file>\n");
log(" write the design to the specified EDIF file. writing of an output file\n");
log(" is omitted if this parameter is not specified.\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(" -dff\n");
log(" run 'abc'/'abc9' with -dff option\n");
log("\n");
log(" -retime\n");
log(" run 'abc' with '-dff -D 1' options\n");
log("\n");
log(" -noccu2\n");
log(" do not use CCU2 cells in output netlist\n");
log("\n");
log(" -nodffe\n");
log(" do not use flipflops with CE in output netlist\n");
log("\n");
log(" -nobram\n");
log(" do not use block RAM cells in output netlist\n");
log("\n");
log(" -nolutram\n");
log(" do not use LUT RAM cells in output netlist\n");
log("\n");
log(" -nowidelut\n");
log(" do not use PFU muxes to implement LUTs larger than LUT4s\n");
log("\n");
log(" -asyncprld\n");
log(" use async PRLD mode to implement ALDFF (EXPERIMENTAL)\n");
log("\n");
log(" -abc2\n");
log(" run two passes of 'abc' for slightly improved logic density\n");
log("\n");
log(" -abc9\n");
log(" use new ABC9 flow (EXPERIMENTAL)\n");
log("\n");
log(" -vpr\n");
log(" generate an output netlist (and BLIF file) suitable for VPR\n");
log(" (this feature is experimental and incomplete)\n");
log("\n");
log(" -nodsp\n");
log(" do not map multipliers to MULT18X18D\n");
log("\n");
log(" -no-rw-check\n");
log(" marks all recognized read ports as \"return don't-care value on\n");
log(" read/write collision\" (same result as setting the no_rw_check\n");
log(" attribute on all memories).\n");
log("\n");
log("\n");
log("The following commands are executed by this synthesis command:\n");
help_script();
log("\n");
}
string top_opt, blif_file, edif_file, json_file;
bool noccu2, nodffe, nobram, nolutram, nowidelut, asyncprld, flatten, dff, retime, abc2, abc9, nodsp, vpr, no_rw_check;
void clear_flags() override
{
top_opt = "-auto-top";
blif_file = "";
edif_file = "";
json_file = "";
noccu2 = false;
nodffe = false;
nobram = false;
nolutram = false;
nowidelut = false;
asyncprld = false;
flatten = true;
dff = false;
retime = false;
abc2 = false;
vpr = false;
abc9 = false;
nodsp = false;
no_rw_check = 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] == "-blif" && argidx+1 < args.size()) {
blif_file = args[++argidx];
continue;
}
if (args[argidx] == "-edif" && argidx+1 < args.size()) {
edif_file = 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] == "-flatten") {
flatten = true;
continue;
}
if (args[argidx] == "-noflatten") {
flatten = false;
continue;
}
if (args[argidx] == "-dff") {
dff = true;
continue;
}
if (args[argidx] == "-retime") {
retime = true;
continue;
}
if (args[argidx] == "-noccu2") {
noccu2 = true;
continue;
}
if (args[argidx] == "-nodffe") {
nodffe = true;
continue;
}
if (args[argidx] == "-nobram") {
nobram = true;
continue;
}
if (args[argidx] == "-asyncprld") {
asyncprld = true;
continue;
}
if (args[argidx] == "-nolutram" || /*deprecated alias*/ args[argidx] == "-nodram") {
nolutram = true;
continue;
}
if (args[argidx] == "-nowidelut" || /*deprecated alias*/ args[argidx] == "-nomux") {
nowidelut = true;
continue;
}
if (args[argidx] == "-abc2") {
abc2 = true;
continue;
}
if (args[argidx] == "-vpr") {
vpr = true;
continue;
}
if (args[argidx] == "-abc9") {
abc9 = true;
continue;
}
if (args[argidx] == "-nodsp") {
nodsp = true;
continue;
}
if (args[argidx] == "-no-rw-check") {
no_rw_check = true;
continue;
}
break;
}
extra_args(args, argidx, design);
if (!design->full_selection())
log_cmd_error("This command only operates on fully selected designs!\n");
if (abc9 && retime)
log_cmd_error("-retime option not currently compatible with -abc9!\n");
log_header(design, "Executing SYNTH_ECP5 pass.\n");
log_push();
run_script(design, run_from, run_to);
log_pop();
}
void script() override
{
std::string no_rw_check_opt = "";
if (no_rw_check)
no_rw_check_opt = " -no-rw-check";
if (help_mode)
no_rw_check_opt = " [-no-rw-check]";
if (check_label("begin"))
{
run("read_verilog -lib -specify +/ecp5/cells_sim.v +/ecp5/cells_bb.v");
run(stringf("hierarchy -check %s", help_mode ? "-top <top>" : top_opt.c_str()));
}
if (check_label("coarse"))
{
run("proc");
if (flatten || help_mode)
run("flatten");
run("tribuf -logic");
run("deminout");
run("opt_expr");
run("opt_clean");
run("check");
run("opt -nodffe -nosdff");
run("fsm");
run("opt");
run("wreduce");
run("peepopt");
run("opt_clean");
run("share");
run("techmap -map +/cmp2lut.v -D LUT_WIDTH=4");
run("opt_expr");
run("opt_clean");
if (!nodsp) {
run("techmap -map +/mul2dsp.v -map +/ecp5/dsp_map.v -D DSP_A_MAXWIDTH=18 -D DSP_B_MAXWIDTH=18 -D DSP_A_MINWIDTH=2 -D DSP_B_MINWIDTH=2 -D DSP_NAME=$__MUL18X18", "(unless -nodsp)");
run("chtype -set $mul t:$__soft_mul", "(unless -nodsp)");
}
run("alumacc");
run("opt");
run("memory -nomap" + no_rw_check_opt);
run("opt_clean");
}
if (check_label("map_ram"))
{
std::string args = "";
if (nobram)
args += " -no-auto-block";
if (nolutram)
args += " -no-auto-distributed";
if (help_mode)
args += " [-no-auto-block] [-no-auto-distributed]";
run("memory_libmap -lib +/ecp5/lutrams.txt -lib +/ecp5/brams.txt" + args, "(-no-auto-block if -nobram, -no-auto-distributed if -nolutram)");
run("techmap -map +/ecp5/lutrams_map.v -map +/ecp5/brams_map.v");
}
if (check_label("map_ffram"))
{
run("opt -fast -mux_undef -undriven -fine");
run("memory_map");
run("opt -undriven -fine");
}
if (check_label("map_gates"))
{
if (noccu2)
run("techmap");
else
run("techmap -map +/techmap.v -map +/ecp5/arith_map.v");
run("opt -fast");
if (retime || help_mode)
run("abc -dff -D 1", "(only if -retime)");
}
if (check_label("map_ffs"))
{
run("opt_clean");
std::string dfflegalize_args = " -cell $_DFF_?_ 01 -cell $_DFF_?P?_ r -cell $_SDFF_?P?_ r";
if (help_mode) {
dfflegalize_args += " [-cell $_DFFE_??_ 01 -cell $_DFFE_?P??_ r -cell $_SDFFE_?P??_ r]";
} else if (!nodffe) {
dfflegalize_args += " -cell $_DFFE_??_ 01 -cell $_DFFE_?P??_ r -cell $_SDFFE_?P??_ r";
}
if (help_mode) {
dfflegalize_args += " [-cell $_ALDFF_?P_ x -cell $_ALDFFE_?P?_ x] [-cell $_DLATCH_?_ x]";
} else if (asyncprld) {
dfflegalize_args += " -cell $_ALDFF_?P_ x -cell $_ALDFFE_?P?_ x";
} else {
dfflegalize_args += " -cell $_DLATCH_?_ x";
}
run("dfflegalize" + dfflegalize_args, "($_ALDFF_*_ only if -asyncprld, $_DLATCH_* only if not -asyncprld, $_*DFFE_* only if not -nodffe)");
if ((abc9 && dff) || help_mode)
run("zinit -all w:* t:$_DFF_?_ t:$_DFFE_??_ t:$_SDFF*", "(only if -abc9 and -dff)");
run("techmap -D NO_LUT -map +/ecp5/cells_map.v");
run("opt_expr -undriven -mux_undef");
run("simplemap");
run("ecp5_gsr");
run("attrmvcp -copy -attr syn_useioff");
run("opt_clean");
}
if (check_label("map_luts"))
{
if (abc2 || help_mode)
run("abc", " (only if -abc2)");
if (!asyncprld || help_mode)
run("techmap -map +/ecp5/latches_map.v", "(skip if -asyncprld)");
if (abc9) {
std::string abc9_opts;
if (nowidelut)
abc9_opts += " -maxlut 4";
std::string k = "synth_ecp5.abc9.W";
if (active_design && active_design->scratchpad.count(k))
abc9_opts += stringf(" -W %s", active_design->scratchpad_get_string(k).c_str());
else
abc9_opts += stringf(" -W %s", RTLIL::constpad.at(k).c_str());
if (nowidelut)
abc9_opts += " -maxlut 4";
if (dff)
abc9_opts += " -dff";
run("abc9" + abc9_opts);
} else {
std::string abc_args = " -dress";
if (nowidelut)
abc_args += " -lut 4";
else
abc_args += " -lut 4:7";
if (dff)
abc_args += " -dff";
run("abc" + abc_args);
}
run("clean");
}
if (check_label("map_cells"))
{
if (help_mode)
run("techmap -map +/ecp5/cells_map.v", "(skip if -vpr)");
else if (!vpr)
run("techmap -map +/ecp5/cells_map.v");
run("opt_lut_ins -tech ecp5");
run("clean");
}
if (check_label("check"))
{
run("autoname");
run("hierarchy -check");
run("stat");
run("check -noinit");
run("blackbox =A:whitebox");
}
if (check_label("blif"))
{
if (!blif_file.empty() || help_mode) {
if (vpr || help_mode) {
run(stringf("opt_clean -purge"),
" (vpr mode)");
run(stringf("write_blif -attr -cname -conn -param %s",
help_mode ? "<file-name>" : blif_file.c_str()),
" (vpr mode)");
}
if (!vpr)
run(stringf("write_blif -gates -attr -param %s",
help_mode ? "<file-name>" : blif_file.c_str()),
" (non-vpr mode)");
}
}
if (check_label("edif"))
{
if (!edif_file.empty() || help_mode)
run(stringf("write_edif %s", help_mode ? "<file-name>" : edif_file.c_str()));
}
if (check_label("json"))
{
if (!json_file.empty() || help_mode)
run(stringf("write_json %s", help_mode ? "<file-name>" : json_file.c_str()));
}
}
} SynthEcp5Pass;
PRIVATE_NAMESPACE_END
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