Add "dffinit -strinit high low"

On some platforms the string to initialize DFF might not be "high" and
"low", e.g. with Anlogic TD it's "SET" and "RESET".

Add a "-strinit" parameter for dffinit to allow specify the strings used
for high and low.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

diff --git a/passes/techmap/dffinit.cc b/passes/techmap/dffinit.cc
index a8eecc9706d9eef617dceee31a1b0dd1854567fc..4fa15a35bf676839f824a2d4eb8e2ee7ec67cedb 100644 (file)
--- a/passes/techmap/dffinit.cc
+++ b/passes/techmap/dffinit.cc
@@ -43,6 +43,11 @@ struct DffinitPass : public Pass {
                log("        initial value of 1 or 0. (multi-bit values are not supported in this\n");
                log("        mode.)\n");
                log("\n");
+               log("    -strinit <string for high> <string for low> \n");
+               log("        use string values in the command line to represent a single-bit\n");
+               log("        initial value of 1 or 0. (multi-bit values are not supported in this\n");
+               log("        mode.)\n");
+               log("\n");
        }
        void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
        {
@@ -50,11 +55,20 @@ struct DffinitPass : public Pass {
 
                dict<IdString, dict<IdString, IdString>> ff_types;
                bool highlow_mode = false;
+               std::string high_string, low_string;
 
                size_t argidx;
                for (argidx = 1; argidx < args.size(); argidx++) {
                        if (args[argidx] == "-highlow") {
                                highlow_mode = true;
+                               high_string = "high";
+                               low_string = "low";
+                               continue;
+                       }
+                       if (args[argidx] == "-strinit" && argidx+2 < args.size()) {
+                               highlow_mode = true;
+                               high_string = args[++argidx];
+                               low_string = args[++argidx];
                                continue;
                        }
                        if (args[argidx] == "-ff" && argidx+3 < args.size()) {
@@ -121,9 +135,9 @@ struct DffinitPass : public Pass {
                                                        log_error("Multi-bit init value for %s.%s.%s is incompatible with -highlow mode.\n",
                                                                        log_id(module), log_id(cell), log_id(it.second));
                                                if (value[0] == State::S1)
-                                                       value = Const("high");
+                                                       value = Const(high_string);
                                                else
-                                                       value = Const("low");
+                                                       value = Const(low_string);
                                        }
 
                                        log("Setting %s.%s.%s (port=%s, net=%s) to %s.\n", log_id(module), log_id(cell), log_id(it.second),