verilog_backend: dump attributes on CaseRule, as comments.

Attributes are not permitted in that position by Verilog grammar.

diff --git a/backends/verilog/verilog_backend.cc b/backends/verilog/verilog_backend.cc
index 827af5d85c4061c3b7d7a5c08dbca87922d5918c..18c92521f92a52d959e5c17d5a7c3de7ad64d159 100644 (file)
--- a/backends/verilog/verilog_backend.cc
+++ b/backends/verilog/verilog_backend.cc
@@ -364,20 +364,22 @@ void dump_sigspec(std::ostream &f, const RTLIL::SigSpec &sig)
        }
 }
 
-void dump_attributes(std::ostream &f, std::string indent, dict<RTLIL::IdString, RTLIL::Const> &attributes, char term = '\n', bool modattr = false)
+void dump_attributes(std::ostream &f, std::string indent, dict<RTLIL::IdString, RTLIL::Const> &attributes, char term = '\n', bool modattr = false, bool as_comment = false)
 {
        if (noattr)
                return;
+       if (attr2comment)
+               as_comment = true;
        for (auto it = attributes.begin(); it != attributes.end(); ++it) {
-               f << stringf("%s" "%s %s", indent.c_str(), attr2comment ? "/*" : "(*", id(it->first).c_str());
+               f << stringf("%s" "%s %s", indent.c_str(), as_comment ? "/*" : "(*", id(it->first).c_str());
                f << stringf(" = ");
                if (modattr && (it->second == Const(0, 1) || it->second == Const(0)))
                        f << stringf(" 0 ");
                else if (modattr && (it->second == Const(1, 1) || it->second == Const(1)))
                        f << stringf(" 1 ");
                else
-                       dump_const(f, it->second, -1, 0, false, attr2comment);
-               f << stringf(" %s%c", attr2comment ? "*/" : "*)", term);
+                       dump_const(f, it->second, -1, 0, false, as_comment);
+               f << stringf(" %s%c", as_comment ? "*/" : "*)", term);
        }
 }
 
@@ -1511,7 +1513,9 @@ void dump_proc_switch(std::ostream &f, std::string indent, RTLIL::SwitchRule *sw
                                dump_sigspec(f, (*it)->compare[i]);
                        }
                }
-               f << stringf(":\n");
+               f << stringf(":");
+               dump_attributes(f, indent, (*it)->attributes, ' ', /*modattr=*/false, /*as_comment=*/true);
+               f << stringf("\n");
                dump_case_body(f, indent + "    ", *it);
        }
 
@@ -1662,7 +1666,7 @@ void dump_module(std::ostream &f, std::string indent, RTLIL::Module *module)
                }
        }
 
-       dump_attributes(f, indent, module->attributes, '\n', true);
+       dump_attributes(f, indent, module->attributes, '\n', /*attr2comment=*/true);
        f << stringf("%s" "module %s(", indent.c_str(), id(module->name, false).c_str());
        bool keep_running = true;
        for (int port_id = 1; keep_running; port_id++) {