Support rand_mode (#5273)

Signed-off-by: Krzysztof Bieganski <[email protected]>

include/verilated_random.cpp

@@ -403,8 +403,12 @@ bool VlRandomizer::parseSolution(std::iostream& f) {
 
         auto it = m_vars.find(name);
         if (it == m_vars.end()) continue;
+        const VlRandomVar& varr = *it->second;
+        if (m_randmode && !varr.randModeIdxNone()) {
+            if (!(m_randmode->at(varr.randModeIdx()))) continue;
+        }
 
-        it->second->set(std::move(value));
+        varr.set(std::move(value));
     }
 
     return true;