Add test_cell tests for C++ functional backend

tests/functional/single_cells/run-test.sh

@@ -0,0 +1,83 @@
+#!/bin/bash
+
+# Initialize an array to store the names of failing RTLIL files and their failure types
+declare -A failing_files
+# Initialize an array to store the names of successful RTLIL files
+declare -A successful_files
+
+# Function to run the test on a given RTLIL file
+run_test() {
+    # Define the common variable for the relative path
+    BASE_PATH="../../../"
+
+    local rtlil_file=$1
+
+    # Extract the base name without extension
+    local base_name=$(basename "$rtlil_file" .v)
+    
+    # Run yosys to process each RTLIL file
+    if ${BASE_PATH}yosys -p "read_rtlil $rtlil_file; write_functional_cxx my_module_functional_cxx.cc"; then
+        echo "Yosys processed $rtlil_file successfully."
+        
+        # Compile the generated C++ files with vcd_harness.cpp
+        if ${CXX:-g++} -g -fprofile-arcs -ftest-coverage vcd_harness.cc -I ${BASE_PATH}backends/functional/cxx_runtime/ -std=c++17 -o vcd_harness; then
+            echo "Compilation successful."
+            # Generate VCD files with base_name
+            if ./vcd_harness ${base_name}_functional_cxx.vcd; then
+		
+		# Run yosys to process each RTLIL file
+		if ${BASE_PATH}yosys -p "read_rtlil $rtlil_file; sim -r ${base_name}_functional_cxx.vcd -scope gold -vcd ${base_name}_yosys_sim.vcd -timescale 1us -sim-gold"; then
+		    echo "Yosys sim $rtlil_file successfully."
+		    successful_files["$rtlil_file"]="Success"
+		else
+		    ${BASE_PATH}yosys -p "read_rtlil $rtlil_file; sim -vcd ${base_name}_yosys_sim.vcd -r ${base_name}_functional_cxx.vcd -scope gold -timescale 1us"
+		    echo "Yosys simulation of $rtlil_file failed. There is a discrepancy with functional cxx"
+		    failing_files["$rtlil_file"]="Yosys sim failure"
+		fi
+		
+            else
+		echo "Failed to generate VCD files for $rtlil_file."
+		failing_files["$rtlil_file"]="VCD generation failure"
+            fi
+	else
+	    echo "Failed to compile harness for $rtlil_file."
+	    failing_files["$rtlil_file"]="Compilation failure"
+	fi
+	else
+            echo "Yosys failed to process $rtlil_file."
+            failing_files["$rtlil_file"]="Yosys failure"
+	fi
+}
+
+# Main function to run all tests
+run_all_tests() {
+    # Loop through all RTLIL files in the rtlil directory
+    for rtlil_file in rtlil/*.il; do
+        run_test "$rtlil_file"
+    done
+
+    # Check if the array of failing files is empty
+    if [ ${#failing_files[@]} -eq 0 ]; then
+        echo "All files passed."
+	echo "The following files passed:"
+        for file in "${!successful_files[@]}"; do
+            echo "$file"
+        done
+        return 0
+    else
+        echo "The following files failed:"
+        for file in "${!failing_files[@]}"; do
+            echo "$file: ${failing_files[$file]}"
+        done
+	echo "The following files passed:"
+        for file in "${!successful_files[@]}"; do
+            echo "$file"
+        done
+        return 1
+    fi
+}
+
+# If the script is being sourced, do not execute the tests
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    run_all_tests
+fi