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Make -nordff the default in "prep" 

Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2018-05-30 13:17:09 +02:00
parent a77e27ab15
commit 7fecc3c199
1 changed files with 13 additions and 9 deletions
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22
techlibs/common/prep.cc
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@ -55,13 +55,14 @@ struct PrepPass : public ScriptPass
log("\n");
log(" -memx\n");
log(" simulate verilog simulation behavior for out-of-bounds memory accesses\n");
log(" using the 'memory_memx' pass. This option implies -nordff.\n");
log(" using the 'memory_memx' pass.\n");
log("\n");
log(" -nomem\n");
log(" do not run any of the memory_* passes\n");
log("\n");
log(" -nordff\n");
log(" passed to 'memory_dff'. prohibits merging of FFs into memory read ports\n");
log(" -rdff\n");
log(" do not pass -nordff to 'memory_dff'. This enables merging of FFs into\n");
log(" memory read ports.\n");
log("\n");
log(" -nokeepdc\n");
log(" do not call opt_* with -keepdc\n");
@ -77,13 +78,12 @@ struct PrepPass : public ScriptPass
log("\n");
}
string top_module, fsm_opts, memory_opts;
bool autotop, flatten, ifxmode, memxmode, nomemmode, nokeepdc;
string top_module, fsm_opts;
bool autotop, flatten, ifxmode, memxmode, nomemmode, nokeepdc, nordff;
virtual void clear_flags() YS_OVERRIDE
{
top_module.clear();
memory_opts.clear();
autotop = false;
flatten = false;
@ -91,6 +91,7 @@ struct PrepPass : public ScriptPass
memxmode = false;
nomemmode = false;
nokeepdc = false;
nordff = true;
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
@ -129,7 +130,6 @@ struct PrepPass : public ScriptPass
}
if (args[argidx] == "-memx") {
memxmode = true;
memory_opts += " -nordff";
continue;
}
if (args[argidx] == "-nomem") {
@ -137,7 +137,11 @@ struct PrepPass : public ScriptPass
continue;
}
if (args[argidx] == "-nordff") {
memory_opts += " -nordff";
nordff = true;
continue;
}
if (args[argidx] == "-rdff") {
nordff = false;
continue;
}
if (args[argidx] == "-nokeepdc") {
@ -196,7 +200,7 @@ struct PrepPass : public ScriptPass
run(memxmode ? "wreduce -memx" : "wreduce");
}
if (!nomemmode) {
run("memory_dff" + (help_mode ? " [-nordff]" : memory_opts));
run(string("memory_dff") + (help_mode ? " [-nordff]" : nordff ? " -nordff" : ""));
if (help_mode || memxmode)
run("memory_memx", "(if -memx)");
run("opt_clean");