diff options
Diffstat (limited to 'techlibs/xilinx/synth_xilinx.cc')
-rw-r--r-- | techlibs/xilinx/synth_xilinx.cc | 291 |
1 files changed, 148 insertions, 143 deletions
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc index 805ae8e6..7dc9915e 100644 --- a/techlibs/xilinx/synth_xilinx.cc +++ b/techlibs/xilinx/synth_xilinx.cc @@ -25,18 +25,9 @@ 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 { @@ -51,6 +42,11 @@ struct SynthXilinxPass : public Pass log(" -top <module>\n"); log(" use the specified module as top module\n"); log("\n"); + log(" -family {xcup|xcu|xc7|xc6s}\n"); + log(" run synthesis for the specified Xilinx architecture\n"); + log(" generate the synthesis netlist for the specified family.\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"); @@ -64,10 +60,19 @@ struct SynthXilinxPass : public Pass 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"); @@ -82,71 +87,33 @@ struct SynthXilinxPass : public Pass 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 -map +/xilinx/ff_map.v\n"); - log(" opt -fast\n"); - log("\n"); - log(" map_luts:\n"); - log(" abc -luts 2:2,3,6:5,10,20 [-dff] (without '-vpr' only!)\n"); - log(" abc -lut 5 [-dff] (with '-vpr' only!)\n"); - log(" clean\n"); - log("\n"); - log(" map_cells:\n"); - log(" techmap -map +/xilinx/cells_map.v\n"); - 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, family; + 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; + family = "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++) @@ -155,6 +122,10 @@ struct SynthXilinxPass : public Pass top_opt = "-top " + args[++argidx]; continue; } + if ((args[argidx] == "-family" || args[argidx] == "-arch") && argidx+1 < args.size()) { + family = args[++argidx]; + continue; + } if (args[argidx] == "-edif" && argidx+1 < args.size()) { edif_file = args[++argidx]; continue; @@ -179,6 +150,14 @@ struct SynthXilinxPass : public Pass retime = true; continue; } + if (args[argidx] == "-nocarry") { + nocarry = true; + continue; + } + if (args[argidx] == "-nowidelut") { + nowidelut = true; + continue; + } if (args[argidx] == "-vpr") { vpr = true; continue; @@ -191,114 +170,140 @@ struct SynthXilinxPass : public Pass nodram = true; continue; } + if (args[argidx] == "-nosrl") { + nosrl = true; + continue; + } break; } extra_args(args, argidx, design); + if (family != "xcup" && family != "xcu" && family != "xc7" && family != "xc6s") + log_cmd_error("Invalid Xilinx -family setting: %s\n", family.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 -map +/xilinx/ff_map.v -D _EXPLICIT_CARRY"); - } else { - Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v -map +/xilinx/ff_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_luts")) - { - 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"); + 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_cells")) - { - Pass::call(design, "techmap -map +/xilinx/cells_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; |