3 files changed, 21 insertions, 0 deletions
diff --git a/backends/cxxrtl/cxxrtl_backend.cc b/backends/cxxrtl/cxxrtl_backend.cc
index 5e5ba5ac0..6d3c2f4f9 100644
--- a/backends/cxxrtl/cxxrtl_backend.cc
+++ b/backends/cxxrtl/cxxrtl_backend.cc
@@ -1935,6 +1935,7 @@ struct CxxrtlWorker {
 		f << "} // namespace " << design_ns << "\n";
 		f << "\n";
 		if (top_module != nullptr && debug_info) {
+			f << "extern \"C\"\n";
 			f << "cxxrtl_toplevel " << design_ns << "_create() {\n";
 			inc_indent();
 				std::string top_type = design_ns + "::" + mangle(top_module);
diff --git a/backends/cxxrtl/cxxrtl_capi.cc b/backends/cxxrtl/cxxrtl_capi.cc
index e0566e152..b77e4c491 100644
--- a/backends/cxxrtl/cxxrtl_capi.cc
+++ b/backends/cxxrtl/cxxrtl_capi.cc
@@ -43,6 +43,14 @@ void cxxrtl_destroy(cxxrtl_handle handle) {
 	delete handle;
 }
 
+int cxxrtl_eval(cxxrtl_handle handle) {
+	return handle->module->eval();
+}
+
+int cxxrtl_commit(cxxrtl_handle handle) {
+	return handle->module->commit();
+}
+
 size_t cxxrtl_step(cxxrtl_handle handle) {
 	return handle->module->step();
 }
diff --git a/backends/cxxrtl/cxxrtl_capi.h b/backends/cxxrtl/cxxrtl_capi.h
index 599284898..1f1942803 100644
--- a/backends/cxxrtl/cxxrtl_capi.h
+++ b/backends/cxxrtl/cxxrtl_capi.h
@@ -55,6 +55,18 @@ cxxrtl_handle cxxrtl_create(cxxrtl_toplevel design);
 // Release all resources used by a design and its handle.
 void cxxrtl_destroy(cxxrtl_handle handle);
 
+// Evaluate the design, propagating changes on inputs to the `next` value of internal state and
+// output wires.
+//
+// Returns 1 if the design is known to immediately converge, 0 otherwise.
+int cxxrtl_eval(cxxrtl_handle handle);
+
+// Commit the design, replacing the `curr` value of internal state and output wires with the `next`
+// value.
+//
+// Return 1 if any of the `curr` values were updated, 0 otherwise.
+int cxxrtl_commit(cxxrtl_handle handle);
+
 // Simulate the design to a fixed point.
 //
 // Returns the number of delta cycles.