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Added "prep -flatten" and "synth -flatten"

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This commit is contained in:
Clifford Wolf 2016-04-24 00:48:33 +02:00
parent 77aa2031e7
commit 09ffebb995
2 changed files with 36 additions and 7 deletions
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21
techlibs/common/prep.cc
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@ -42,6 +42,10 @@ struct PrepPass : public ScriptPass
log(" -top <module>\n");
log(" use the specified module as top module (default='top')\n");
log("\n");
log(" -flatten\n");
log(" flatten the design before synthesis. this will pass '-auto-top' to\n");
log(" 'hierarchy' if no top module is specified.\n");
log("\n");
log(" -nordff\n");
log(" passed to 'memory_dff'. prohibits merging of FFs into memory read ports\n");
log("\n");
@ -57,11 +61,13 @@ struct PrepPass : public ScriptPass
}
string top_module, fsm_opts, memory_opts;
bool flatten;
virtual void clear_flags() YS_OVERRIDE
{
top_module.clear();
memory_opts.clear();
flatten = false;
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
@ -86,6 +92,10 @@ struct PrepPass : public ScriptPass
}
continue;
}
if (args[argidx] == "-flatten") {
flatten = true;
continue;
}
if (args[argidx] == "-nordff") {
memory_opts += " -nordff";
continue;
@ -113,9 +123,12 @@ struct PrepPass : public ScriptPass
if (help_mode) {
run("hierarchy -check [-top <top>]");
} else {
if (top_module.empty())
run("hierarchy -check");
else
if (top_module.empty()) {
if (flatten)
run("hierarchy -check -auto-top");
else
run("hierarchy -check");
} else
run(stringf("hierarchy -check -top %s", top_module.c_str()));
}
}
@ -123,6 +136,8 @@ struct PrepPass : public ScriptPass
if (check_label("coarse"))
{
run("proc");
if (help_mode || flatten)
run("flatten", "(if -flatten)");
run("opt_expr -keepdc");
run("opt_clean");
run("check");