[Downgrade] downgrade example file to 4.0 ver.

CMakeLists.txt

@@ -7,6 +7,9 @@ if(NOT DEFINED VERILATOR_ROOT)
   set(ENV{VERILATOR_ROOT} "/home/blur/gits/verilator")
 endif()
 
+# 设置 Verilator 头文件目录
+include_directories($ENV{VERILATOR_ROOT}/include)
+
 # 设置编译器参数
 if (${CMAKE_BUILD_TYPE} STREQUAL "Debug")
   message("Turn On Debugger")
@@ -52,8 +55,6 @@ set(LACPU lacpu)
 set(LAVSIM lavsim)
 set(LA_VSIM_TARGET ${PROJECT_NAME}-vsim)
 
-include_directories(${verilator_DIR}/include)
-
 find_package(verilator HINTS $ENV{VERILATOR_ROOT} ${VERILATOR_ROOT})
 
 if (NOT verilator_FOUND)

lavsim/main.cc

@@ -18,18 +18,15 @@ int main(int argc, char** argv) {
     // real project, it is better to start with a more complete example,
     // e.g. examples/c_tracing.
 
-    // Construct a VerilatedContext to hold simulation time, etc.
-    VerilatedContext* contextp = new VerilatedContext;
-
     // Pass arguments so Verilated code can see them, e.g. $value$plusargs
     // This needs to be called before you create any model
-    contextp->commandArgs(argc, argv);
+    Verilated::commandArgs(argc, argv);
 
     // Construct the Verilated model, from Vtop.h generated from Verilating "top.v"
-    Vtop* top = new Vtop{contextp};
+    Vtop* top = new Vtop();
 
     // Simulate until $finish
-    while (!contextp->gotFinish()) {
+    while (!Verilated::gotFinish()) {
 
         // Evaluate model
         top->eval();