From 815fab9d7136506aec0d38300e68bd88810195d3 Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Thu, 18 Sep 2014 12:57:37 +0200 Subject: Added "abc -fast" --- passes/abc/abc.cc | 37 +++++++++++++++++++++++++++++++------ 1 file changed, 31 insertions(+), 6 deletions(-) (limited to 'passes/abc') diff --git a/passes/abc/abc.cc b/passes/abc/abc.cc index b18f8835..11818bf1 100644 --- a/passes/abc/abc.cc +++ b/passes/abc/abc.cc @@ -34,6 +34,11 @@ #define ABC_COMMAND_LUT "strash; scorr -v; ifraig -v; retime -v; strash; dch -vf; if -v" #define ABC_COMMAND_DFL "strash; scorr -v; ifraig -v; retime -v; strash; dch -vf; map -v" +#define ABC_FAST_COMMAND_LIB "strash; scorr -v; retime -v {D}; strash; map -v {D}" +#define ABC_FAST_COMMAND_CTR "strash; scorr -v; retime -v {D}; strash; map -v {D}; buffer -v; upsize -v {D}; dnsize -v {D}; stime -p" +#define ABC_FAST_COMMAND_LUT "strash; scorr -v; retime -v; strash; if -v" +#define ABC_FAST_COMMAND_DFL "strash; scorr -v; retime -v; strash; map -v" + #include "kernel/register.h" #include "kernel/sigtools.h" #include "kernel/log.h" @@ -479,7 +484,7 @@ static std::string fold_abc_cmd(std::string str) static void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std::string script_file, std::string exe_file, std::string liberty_file, std::string constr_file, bool cleanup, int lut_mode, bool dff_mode, std::string clk_str, - bool keepff, std::string delay_target) + bool keepff, std::string delay_target, bool fast_mode) { module = current_module; map_autoidx = autoidx++; @@ -512,11 +517,11 @@ static void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std } else abc_command = stringf("source %s", script_file.c_str()); } else if (lut_mode) - abc_command = ABC_COMMAND_LUT; + abc_command = fast_mode ? ABC_FAST_COMMAND_LUT : ABC_COMMAND_LUT; else if (!liberty_file.empty()) - abc_command = constr_file.empty() ? ABC_COMMAND_LIB : ABC_COMMAND_CTR; + abc_command = constr_file.empty() ? (fast_mode ? ABC_FAST_COMMAND_LIB : ABC_COMMAND_LIB) : (fast_mode ? ABC_FAST_COMMAND_CTR : ABC_COMMAND_CTR); else - abc_command = ABC_COMMAND_DFL; + abc_command = fast_mode ? ABC_FAST_COMMAND_DFL : ABC_COMMAND_DFL; for (size_t pos = abc_command.find("{D}"); pos != std::string::npos; pos = abc_command.find("{D}", pos)) abc_command = abc_command.substr(0, pos) + delay_target + abc_command.substr(pos+3); @@ -1041,6 +1046,22 @@ struct AbcPass : public Pass { log(" otherwise:\n"); log("%s\n", fold_abc_cmd(ABC_COMMAND_DFL).c_str()); log("\n"); + log(" -fast\n"); + log(" use different default scripts that are slightly faster (at the cost\n"); + log(" of output quality):\n"); + log("\n"); + log(" for -liberty without -constr:\n"); + log("%s\n", fold_abc_cmd(ABC_FAST_COMMAND_LIB).c_str()); + log("\n"); + log(" for -liberty with -constr:\n"); + log("%s\n", fold_abc_cmd(ABC_FAST_COMMAND_CTR).c_str()); + log("\n"); + log(" for -lut:\n"); + log("%s\n", fold_abc_cmd(ABC_FAST_COMMAND_LUT).c_str()); + log("\n"); + log(" otherwise:\n"); + log("%s\n", fold_abc_cmd(ABC_FAST_COMMAND_DFL).c_str()); + log("\n"); log(" -liberty \n"); log(" generate netlists for the specified cell library (using the liberty\n"); log(" file format).\n"); @@ -1097,7 +1118,7 @@ struct AbcPass : public Pass { std::string exe_file = proc_self_dirname() + "yosys-abc"; std::string script_file, liberty_file, constr_file, clk_str, delay_target; - bool dff_mode = false, keepff = false, cleanup = true; + bool fast_mode = false, dff_mode = false, keepff = false, cleanup = true; int lut_mode = 0; size_t argidx; @@ -1138,6 +1159,10 @@ struct AbcPass : public Pass { lut_mode = atoi(args[++argidx].c_str()); continue; } + if (arg == "-fast") { + fast_mode = true; + continue; + } if (arg == "-dff") { dff_mode = true; continue; @@ -1168,7 +1193,7 @@ struct AbcPass : public Pass { if (mod_it.second->processes.size() > 0) log("Skipping module %s as it contains processes.\n", mod_it.second->name.c_str()); else - abc_module(design, mod_it.second, script_file, exe_file, liberty_file, constr_file, cleanup, lut_mode, dff_mode, clk_str, keepff, delay_target); + abc_module(design, mod_it.second, script_file, exe_file, liberty_file, constr_file, cleanup, lut_mode, dff_mode, clk_str, keepff, delay_target, fast_mode); } assign_map.clear(); -- cgit v1.2.3