diff options
Diffstat (limited to 'techlibs/common/synth.cc')
| -rw-r--r-- | techlibs/common/synth.cc | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/techlibs/common/synth.cc b/techlibs/common/synth.cc index 949678f36..859a6606f 100644 --- a/techlibs/common/synth.cc +++ b/techlibs/common/synth.cc @@ -41,6 +41,10 @@ struct SynthPass : 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(" -encfile <file>\n"); log(" passed to 'fsm_recode' via 'fsm'\n"); log("\n"); @@ -69,7 +73,7 @@ struct SynthPass : public ScriptPass } string top_module, fsm_opts, memory_opts; - bool noalumacc, nofsm, noabc; + bool flatten, noalumacc, nofsm, noabc; virtual void clear_flags() YS_OVERRIDE { @@ -77,6 +81,7 @@ struct SynthPass : public ScriptPass fsm_opts.clear(); memory_opts.clear(); + flatten = false; noalumacc = false; nofsm = false; noabc = false; @@ -109,6 +114,10 @@ struct SynthPass : public ScriptPass } continue; } + if (args[argidx] == "-flatten") { + flatten = true; + continue; + } if (args[argidx] == "-nofsm") { nofsm = true; continue; @@ -147,9 +156,12 @@ struct SynthPass : public ScriptPass if (help_mode) { run("hierarchy -check [-top <top>]"); } else { - if (top_module.empty()) - run(stringf("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())); } } @@ -157,6 +169,8 @@ struct SynthPass : public ScriptPass if (check_label("coarse")) { run("proc"); + if (help_mode || flatten) + run("flatten", "(if -flatten)"); run("opt_expr"); run("opt_clean"); run("check"); |