Elaborate on help message

diff --git a/passes/pmgen/split_shiftx.cc b/passes/pmgen/split_shiftx.cc
index 71fb4e9efc41945b943fadbfd73f977e23e29131..6eee888861a21361a8b004fa698665143ce21295 100644 (file)
--- a/passes/pmgen/split_shiftx.cc
+++ b/passes/pmgen/split_shiftx.cc
@@ -56,7 +56,8 @@ struct BitblastShiftxPass : public Pass {
                log("    split_shiftx [selection]\n");
                log("\n");
                log("Split up $shiftx cells where Y_WIDTH > 1, with consideration for any $macc\n");
-               log("cells that may be driving their B inputs.\n");
+               log("cells -- configured as a constant multiplier equal to Y_WIDTH -- that may be\n");
+               log("driving their B inputs.\n");
                log("\n");
        }
        void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE