Improve shregmap help message, fixes #1113

Signed-off-by: Clifford Wolf <clifford@clifford.at>

diff --git a/passes/techmap/shregmap.cc b/passes/techmap/shregmap.cc
index 21dfe96198c43a252575bb6483c2fd062b241328..18e60fa6b71471334626d518d0a3ad25775153f0 100644 (file)
--- a/passes/techmap/shregmap.cc
+++ b/passes/techmap/shregmap.cc
@@ -605,9 +605,11 @@ struct ShregmapPass : public Pass {
                log("\n");
                log("    -tech greenpak4\n");
                log("        map to greenpak4 shift registers.\n");
+               log("        this option also implies -clkpol pos -zinit\n");
                log("\n");
                log("    -tech xilinx\n");
                log("        map to xilinx dynamic-length shift registers.\n");
+               log("        this option also implies -params -init\n");
                log("\n");
        }
        void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE