USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
-bool check_label(bool &active, std::string run_from, std::string run_to, std::string label)
+struct SynthXilinxPass : public ScriptPass
{
- if (label == run_from)
- active = true;
- if (label == run_to)
- active = false;
- return active;
-}
-
-struct SynthXilinxPass : public Pass
-{
- SynthXilinxPass() : Pass("synth_xilinx", "synthesis for Xilinx FPGAs") { }
+ SynthXilinxPass() : ScriptPass("synth_xilinx", "synthesis for Xilinx FPGAs") { }
void help() YS_OVERRIDE
{
log(" -top <module>\n");
log(" use the specified module as top module\n");
log("\n");
+ log(" -arch {xcup|xcu|xc7|xc6s}\n");
+ log(" run synthesis for the specified Xilinx architecture\n");
+ log(" default: xc7\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(" (this feature is experimental and incomplete)\n");
log("\n");
log(" -nobram\n");
- log(" disable infering of block rams\n");
+ log(" disable inference of block rams\n");
log("\n");
log(" -nodram\n");
- log(" disable infering of distributed rams\n");
+ log(" disable inference of distributed rams\n");
+ log("\n");
+ log(" -nosrl\n");
+ log(" disable inference of shift registers\n");
+ log("\n");
+ log(" -nocarry\n");
+ log(" do not use XORCY/MUXCY/CARRY4 cells in output netlist\n");
+ log("\n");
+ log(" -nowidelut\n");
+ log(" do not use MUXF[78] resources to implement LUTs larger than LUT6s\n");
log("\n");
log(" -run <from_label>:<to_label>\n");
log(" only run the commands between the labels (see below). an empty\n");
log("\n");
log("\n");
log("The following commands are executed by this synthesis command:\n");
- log("\n");
- log(" begin:\n");
- log(" read_verilog -lib +/xilinx/cells_sim.v\n");
- log(" read_verilog -lib +/xilinx/cells_xtra.v\n");
- log(" read_verilog -lib +/xilinx/brams_bb.v\n");
- log(" hierarchy -check -top <top>\n");
- log("\n");
- log(" flatten: (only if -flatten)\n");
- log(" proc\n");
- log(" flatten\n");
- log("\n");
- log(" coarse:\n");
- log(" synth -run coarse\n");
- log("\n");
- log(" bram: (only executed when '-nobram' is not given)\n");
- log(" memory_bram -rules +/xilinx/brams.txt\n");
- log(" techmap -map +/xilinx/brams_map.v\n");
- log("\n");
- log(" dram: (only executed when '-nodram' is not given)\n");
- log(" memory_bram -rules +/xilinx/drams.txt\n");
- log(" techmap -map +/xilinx/drams_map.v\n");
- log("\n");
- log(" fine:\n");
- log(" opt -fast -full\n");
- log(" memory_map\n");
- log(" dffsr2dff\n");
- log(" dff2dffe\n");
- log(" opt -full\n");
- log(" techmap -map +/techmap.v -map +/xilinx/arith_map.v\n");
- log(" opt -fast\n");
- log("\n");
- log(" map_cells:\n");
- log(" techmap -map +/xilinx/cells_map.v\n");
- log(" clean\n");
- log("\n");
- log(" map_luts:\n");
- log(" techmap -map +/techmap.v -map +/xilinx/ff_map.v t:$_DFF_?N?\n");
- log(" abc -luts 2:2,3,6:5,10,20 [-dff]\n");
- log(" clean\n");
- log(" techmap -map +/xilinx/lut_map.v -map +/xilinx/ff_map.v");
- log(" dffinit -ff FDRE Q INIT -ff FDCE Q INIT -ff FDPE Q INIT -ff FDSE Q INIT \\\n");
- log(" -ff FDRE_1 Q INIT -ff FDCE_1 Q INIT -ff FDPE_1 Q INIT -ff FDSE_1 Q INIT\n");
- log(" clean\n");
- log("\n");
- log(" check:\n");
- log(" hierarchy -check\n");
- log(" stat\n");
- log(" check -noinit\n");
- log("\n");
- log(" edif: (only if -edif)\n");
- log(" write_edif <file-name>\n");
- log("\n");
- log(" blif: (only if -blif)\n");
- log(" write_blif <file-name>\n");
+ help_script();
log("\n");
}
+
+ std::string top_opt, edif_file, blif_file, arch;
+ bool flatten, retime, vpr, nobram, nodram, nosrl, nocarry, nowidelut;
+
+ void clear_flags() YS_OVERRIDE
+ {
+ top_opt = "-auto-top";
+ edif_file.clear();
+ blif_file.clear();
+ flatten = false;
+ retime = false;
+ vpr = false;
+ nobram = false;
+ nodram = false;
+ nosrl = false;
+ nocarry = false;
+ nowidelut = false;
+ arch = "xc7";
+ }
+
void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
{
- std::string top_opt = "-auto-top";
- std::string edif_file;
- std::string blif_file;
std::string run_from, run_to;
- bool flatten = false;
- bool retime = false;
- bool vpr = false;
- bool nobram = false;
- bool nodram = false;
+ clear_flags();
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)
top_opt = "-top " + args[++argidx];
continue;
}
+ if (args[argidx] == "-arch" && argidx+1 < args.size()) {
+ arch = args[++argidx];
+ continue;
+ }
if (args[argidx] == "-edif" && argidx+1 < args.size()) {
edif_file = args[++argidx];
continue;
retime = true;
continue;
}
+ if (args[argidx] == "-nocarry") {
+ nocarry = true;
+ continue;
+ }
+ if (args[argidx] == "-nowidelut") {
+ nowidelut = true;
+ continue;
+ }
if (args[argidx] == "-vpr") {
vpr = true;
continue;
nodram = true;
continue;
}
+ if (args[argidx] == "-nosrl") {
+ nosrl = true;
+ continue;
+ }
break;
}
extra_args(args, argidx, design);
+ if (arch != "xcup" && arch != "xcu" && arch != "xc7" && arch != "xc6s")
+ log_cmd_error("Invalid Xilinx -arch setting: %s\n", arch.c_str());
+
if (!design->full_selection())
log_cmd_error("This command only operates on fully selected designs!\n");
- bool active = run_from.empty();
-
log_header(design, "Executing SYNTH_XILINX pass.\n");
log_push();
- if (check_label(active, run_from, run_to, "begin"))
- {
- if (vpr) {
- Pass::call(design, "read_verilog -lib -D_EXPLICIT_CARRY +/xilinx/cells_sim.v");
- } else {
- Pass::call(design, "read_verilog -lib +/xilinx/cells_sim.v");
- }
+ run_script(design, run_from, run_to);
- Pass::call(design, "read_verilog -lib +/xilinx/cells_xtra.v");
+ log_pop();
+ }
- if (!nobram) {
- Pass::call(design, "read_verilog -lib +/xilinx/brams_bb.v");
- }
+ void script() YS_OVERRIDE
+ {
+ if (check_label("begin")) {
+ if (vpr)
+ run("read_verilog -lib -D_EXPLICIT_CARRY +/xilinx/cells_sim.v");
+ else
+ run("read_verilog -lib +/xilinx/cells_sim.v");
+
+ run("read_verilog -lib +/xilinx/cells_xtra.v");
- Pass::call(design, stringf("hierarchy -check %s", top_opt.c_str()));
+ if (!nobram || help_mode)
+ run("read_verilog -lib +/xilinx/brams_bb.v", "(skip if '-nobram')");
+
+ run(stringf("hierarchy -check %s", top_opt.c_str()));
}
- if (flatten && check_label(active, run_from, run_to, "flatten"))
- {
- Pass::call(design, "proc");
- Pass::call(design, "flatten");
+ if (check_label("flatten", "(with '-flatten' only)")) {
+ if (flatten || help_mode) {
+ run("proc");
+ run("flatten");
+ }
}
- if (check_label(active, run_from, run_to, "coarse"))
- {
- Pass::call(design, "synth -run coarse");
+ if (check_label("coarse")) {
+ run("synth -run coarse");
}
- if (check_label(active, run_from, run_to, "bram"))
- {
- if (!nobram) {
- Pass::call(design, "memory_bram -rules +/xilinx/brams.txt");
- Pass::call(design, "techmap -map +/xilinx/brams_map.v");
+ if (check_label("bram", "(skip if '-nobram')")) {
+ if (!nobram || help_mode) {
+ run("memory_bram -rules +/xilinx/brams.txt");
+ run("techmap -map +/xilinx/brams_map.v");
}
}
- if (check_label(active, run_from, run_to, "dram"))
- {
- if (!nodram) {
- Pass::call(design, "memory_bram -rules +/xilinx/drams.txt");
- Pass::call(design, "techmap -map +/xilinx/drams_map.v");
+ if (check_label("dram", "(skip if '-nodram')")) {
+ if (!nodram || help_mode) {
+ run("memory_bram -rules +/xilinx/drams.txt");
+ run("techmap -map +/xilinx/drams_map.v");
}
}
- if (check_label(active, run_from, run_to, "fine"))
- {
- Pass::call(design, "opt -fast -full");
- Pass::call(design, "memory_map");
- Pass::call(design, "dffsr2dff");
- Pass::call(design, "dff2dffe");
- Pass::call(design, "opt -full");
-
- if (vpr) {
- Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v -D _EXPLICIT_CARRY");
- } else {
- Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v");
+ if (check_label("fine")) {
+ // shregmap -tech xilinx can cope with $shiftx and $mux
+ // cells for identifiying variable-length shift registers,
+ // so attempt to convert $pmux-es to the former
+ if (!nosrl || help_mode)
+ run("pmux2shiftx", "(skip if '-nosrl')");
+
+ run("opt -fast -full");
+ run("memory_map");
+ run("dffsr2dff");
+ run("dff2dffe");
+ run("opt -full");
+
+ if (!nosrl || help_mode) {
+ // shregmap operates on bit-level flops, not word-level,
+ // so break those down here
+ run("simplemap t:$dff t:$dffe", "(skip if '-nosrl')");
+ // shregmap with '-tech xilinx' infers variable length shift regs
+ run("shregmap -tech xilinx -minlen 3", "(skip if '-nosrl')");
}
- Pass::call(design, "hierarchy -check");
- Pass::call(design, "opt -fast");
+ if (help_mode)
+ run("techmap -map +/techmap.v [-map +/xilinx/arith_map.v]", "(skip if '-nocarry')");
+ else if (!nocarry) {
+ if (!vpr)
+ run("techmap -map +/techmap.v -map +/xilinx/arith_map.v");
+ else
+ run("techmap -map +/techmap.v -map +/xilinx/arith_map.v -D _EXPLICIT_CARRY");
+ }
+
+ run("opt -fast");
}
- if (check_label(active, run_from, run_to, "map_cells"))
- {
- Pass::call(design, "techmap -map +/xilinx/cells_map.v");
- Pass::call(design, "clean");
+ if (check_label("map_cells")) {
+ run("techmap -map +/techmap.v -map +/xilinx/cells_map.v");
+ run("clean");
}
- if (check_label(active, run_from, run_to, "map_luts"))
- {
- Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/ff_map.v t:$_DFF_?N?");
- Pass::call(design, "abc -luts 2:2,3,6:5,10,20" + string(retime ? " -dff" : ""));
- Pass::call(design, "clean");
- Pass::call(design, "techmap -map +/xilinx/lut_map.v -map +/xilinx/ff_map.v");
- Pass::call(design, "dffinit -ff FDRE Q INIT -ff FDCE Q INIT -ff FDPE Q INIT -ff FDSE Q INIT "
+ if (check_label("map_luts")) {
+ if (help_mode)
+ run("abc -luts 2:2,3,6:5[,10,20] [-dff]", "(skip if 'nowidelut', only for '-retime')");
+ else if (nowidelut)
+ run("abc -luts 2:2,3,6:5" + string(retime ? " -dff" : ""));
+ else
+ run("abc -luts 2:2,3,6:5,10,20" + string(retime ? " -dff" : ""));
+ run("clean");
+ // This shregmap call infers fixed length shift registers after abc
+ // has performed any necessary retiming
+ if (!nosrl || help_mode)
+ run("shregmap -minlen 3 -init -params -enpol any_or_none", "(skip if '-nosrl')");
+ run("techmap -map +/xilinx/lut_map.v -map +/xilinx/ff_map.v -map +/xilinx/cells_map.v");
+ run("dffinit -ff FDRE Q INIT -ff FDCE Q INIT -ff FDPE Q INIT -ff FDSE Q INIT "
"-ff FDRE_1 Q INIT -ff FDCE_1 Q INIT -ff FDPE_1 Q INIT -ff FDSE_1 Q INIT");
- Pass::call(design, "clean");
+ run("clean");
}
- if (check_label(active, run_from, run_to, "check"))
- {
- Pass::call(design, "hierarchy -check");
- Pass::call(design, "stat");
- Pass::call(design, "check -noinit");
+ if (check_label("check")) {
+ run("hierarchy -check");
+ run("stat -tech xilinx");
+ run("check -noinit");
}
- if (check_label(active, run_from, run_to, "edif"))
- {
- if (!edif_file.empty())
- Pass::call(design, stringf("write_edif -pvector bra %s", edif_file.c_str()));
- }
- if (check_label(active, run_from, run_to, "blif"))
- {
- if (!blif_file.empty())
- Pass::call(design, stringf("write_blif %s", edif_file.c_str()));
+ if (check_label("edif")) {
+ if (!edif_file.empty() || help_mode)
+ run(stringf("write_edif -pvector bra %s", edif_file.c_str()));
}
- log_pop();
+ if (check_label("blif")) {
+ if (!blif_file.empty() || help_mode)
+ run(stringf("write_blif %s", edif_file.c_str()));
+ }
}
} SynthXilinxPass;
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