mirror of https://github.com/YosysHQ/yosys.git
dfflibmap: Add a -dont_use flag to ignore cells
This is an alternative to setting the dont_use property in lib. This brings dfflibmap in parity with the abc pass for dont_use. Signed-off-by: Austin Rovinski <rovinski@nyu.edu>
This commit is contained in:
Austin Rovinski
parent
f8d4d7128c
commit
689feed012
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@ -23,6 +23,13 @@
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#include <string.h>
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#include <errno.h>
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#ifdef _WIN32
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#include <shlwapi.h>
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#pragma comment(lib, "shlwapi.lib")
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#else
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#include <fnmatch.h>
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#endif
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USING_YOSYS_NAMESPACE
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PRIVATE_NAMESPACE_BEGIN
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@ -115,7 +122,15 @@ static bool parse_pin(LibertyAst *cell, LibertyAst *attr, std::string &pin_name,
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return false;
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}
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static void find_cell(LibertyAst *ast, IdString cell_type, bool clkpol, bool has_reset, bool rstpol, bool rstval)
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static int glob_match(const char *pattern, const char *string) {
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#ifdef _WIN32
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return PathMatchSpec(string, pattern);
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#else
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return fnmatch(pattern, string, 0) == 0;
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#endif
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}
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static void find_cell(LibertyAst *ast, IdString cell_type, bool clkpol, bool has_reset, bool rstpol, bool rstval, std::vector<std::string> &dont_use_cells)
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{
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LibertyAst *best_cell = nullptr;
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std::map<std::string, char> best_cell_ports;
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@ -135,6 +150,18 @@ static void find_cell(LibertyAst *ast, IdString cell_type, bool clkpol, bool has
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if (dn != nullptr && dn->value == "true")
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continue;
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bool dont_use = false;
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for (std::string &dont_use_cell : dont_use_cells)
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{
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if (glob_match(dont_use_cell.c_str(), cell->args[0].c_str()))
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{
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dont_use = true;
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break;
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}
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}
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if (dont_use)
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continue;
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LibertyAst *ff = cell->find("ff");
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if (ff == nullptr)
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continue;
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@ -227,7 +254,7 @@ static void find_cell(LibertyAst *ast, IdString cell_type, bool clkpol, bool has
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}
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}
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static void find_cell_sr(LibertyAst *ast, IdString cell_type, bool clkpol, bool setpol, bool clrpol)
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static void find_cell_sr(LibertyAst *ast, IdString cell_type, bool clkpol, bool setpol, bool clrpol, std::vector<std::string> &dont_use_cells)
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{
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LibertyAst *best_cell = nullptr;
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std::map<std::string, char> best_cell_ports;
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@ -247,6 +274,18 @@ static void find_cell_sr(LibertyAst *ast, IdString cell_type, bool clkpol, bool
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if (dn != nullptr && dn->value == "true")
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continue;
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bool dont_use = false;
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for (std::string &dont_use_cell : dont_use_cells)
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{
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if (glob_match(dont_use_cell.c_str(), cell->args[0].c_str()))
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{
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dont_use = true;
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break;
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}
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}
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if (dont_use)
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continue;
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LibertyAst *ff = cell->find("ff");
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if (ff == nullptr)
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continue;
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@ -414,7 +453,7 @@ struct DfflibmapPass : public Pass {
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void help() override
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{
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log("\n");
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log(" dfflibmap [-prepare] [-map-only] [-info] -liberty <file> [selection]\n");
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log(" dfflibmap [-prepare] [-map-only] [-info] [-dont_use <cell_name>] -liberty <file> [selection]\n");
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log("\n");
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log("Map internal flip-flop cells to the flip-flop cells in the technology\n");
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log("library specified in the given liberty file.\n");
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@ -435,6 +474,11 @@ struct DfflibmapPass : public Pass {
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log("that would be passed to the dfflegalize pass. The design will not be\n");
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log("changed.\n");
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log("\n");
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log("When called with -dont_use, this command will not map to the specified cell\n");
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log("name as an alternative to setting the dont_use property in the Liberty file.\n");
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log("This argument can be called multiple times with different cell names. This\n");
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log("argument also supports simple glob patterns in the cell name.\n");
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log("\n");
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}
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void execute(std::vector<std::string> args, RTLIL::Design *design) override
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{
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@ -446,6 +490,8 @@ struct DfflibmapPass : public Pass {
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bool map_only_mode = false;
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bool info_mode = false;
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std::vector<std::string> dont_use_cells;
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size_t argidx;
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for (argidx = 1; argidx < args.size(); argidx++)
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{
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@ -467,6 +513,10 @@ struct DfflibmapPass : public Pass {
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info_mode = true;
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continue;
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}
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if (arg == "-dont_use" && argidx+1 < args.size()) {
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dont_use_cells.push_back(args[++argidx]);
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continue;
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}
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break;
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}
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extra_args(args, argidx, design);
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@ -491,26 +541,26 @@ struct DfflibmapPass : public Pass {
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LibertyParser libparser(f);
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f.close();
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find_cell(libparser.ast, ID($_DFF_N_), false, false, false, false);
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find_cell(libparser.ast, ID($_DFF_P_), true, false, false, false);
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find_cell(libparser.ast, ID($_DFF_N_), false, false, false, false, dont_use_cells);
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find_cell(libparser.ast, ID($_DFF_P_), true, false, false, false, dont_use_cells);
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find_cell(libparser.ast, ID($_DFF_NN0_), false, true, false, false);
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find_cell(libparser.ast, ID($_DFF_NN1_), false, true, false, true);
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find_cell(libparser.ast, ID($_DFF_NP0_), false, true, true, false);
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find_cell(libparser.ast, ID($_DFF_NP1_), false, true, true, true);
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find_cell(libparser.ast, ID($_DFF_PN0_), true, true, false, false);
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find_cell(libparser.ast, ID($_DFF_PN1_), true, true, false, true);
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find_cell(libparser.ast, ID($_DFF_PP0_), true, true, true, false);
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find_cell(libparser.ast, ID($_DFF_PP1_), true, true, true, true);
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find_cell(libparser.ast, ID($_DFF_NN0_), false, true, false, false, dont_use_cells);
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find_cell(libparser.ast, ID($_DFF_NN1_), false, true, false, true, dont_use_cells);
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find_cell(libparser.ast, ID($_DFF_NP0_), false, true, true, false, dont_use_cells);
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find_cell(libparser.ast, ID($_DFF_NP1_), false, true, true, true, dont_use_cells);
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find_cell(libparser.ast, ID($_DFF_PN0_), true, true, false, false, dont_use_cells);
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find_cell(libparser.ast, ID($_DFF_PN1_), true, true, false, true, dont_use_cells);
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find_cell(libparser.ast, ID($_DFF_PP0_), true, true, true, false, dont_use_cells);
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find_cell(libparser.ast, ID($_DFF_PP1_), true, true, true, true, dont_use_cells);
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find_cell_sr(libparser.ast, ID($_DFFSR_NNN_), false, false, false);
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find_cell_sr(libparser.ast, ID($_DFFSR_NNP_), false, false, true);
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find_cell_sr(libparser.ast, ID($_DFFSR_NPN_), false, true, false);
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find_cell_sr(libparser.ast, ID($_DFFSR_NPP_), false, true, true);
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find_cell_sr(libparser.ast, ID($_DFFSR_PNN_), true, false, false);
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find_cell_sr(libparser.ast, ID($_DFFSR_PNP_), true, false, true);
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find_cell_sr(libparser.ast, ID($_DFFSR_PPN_), true, true, false);
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find_cell_sr(libparser.ast, ID($_DFFSR_PPP_), true, true, true);
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find_cell_sr(libparser.ast, ID($_DFFSR_NNN_), false, false, false, dont_use_cells);
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find_cell_sr(libparser.ast, ID($_DFFSR_NNP_), false, false, true, dont_use_cells);
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find_cell_sr(libparser.ast, ID($_DFFSR_NPN_), false, true, false, dont_use_cells);
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find_cell_sr(libparser.ast, ID($_DFFSR_NPP_), false, true, true, dont_use_cells);
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find_cell_sr(libparser.ast, ID($_DFFSR_PNN_), true, false, false, dont_use_cells);
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find_cell_sr(libparser.ast, ID($_DFFSR_PNP_), true, false, true, dont_use_cells);
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find_cell_sr(libparser.ast, ID($_DFFSR_PPN_), true, true, false, dont_use_cells);
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find_cell_sr(libparser.ast, ID($_DFFSR_PPP_), true, true, true, dont_use_cells);
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log(" final dff cell mappings:\n");
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logmap_all();
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@ -58,3 +58,10 @@ select -assert-count 4 t:$_NOT_
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select -assert-count 1 t:dffn
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select -assert-count 4 t:dffsr
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select -assert-none t:dffn t:dffsr t:$_NOT_ %% %n t:* %i
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design -load orig
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dfflibmap -liberty dfflibmap.lib -dont_use *ffn
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clean
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select -assert-count 0 t:dffn
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select -assert-count 5 t:dffsr
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