fix(tb): fix run_tb.sh TCL variable extraction

Convert TCL 'set VAR path' to bash VAR=path before executing
xvlog/xelab/xsim commands extracted from xsim_run.tcl files.

run_tb.sh

@@ -57,26 +57,27 @@ echo "========================================"
 echo " Running testbench for: $MODULE"
 echo "========================================"
 
-# Run xvlog + xelab + xsim commands directly (not via vivado batch)
+# Save TCL variables as bash variables, run commands with substitution
-# Extract and execute xvlog, xelab, xsim lines from the TCL
+execute_tcl() {
-grep -E '^xvlog ' "$TCL_FILE" | while read -r cmd; do
+    local tcl_file="$1"
-    if [[ "$cmd" != \#* ]]; then
+    local tmp_script="/tmp/run_tb_$$.sh"
-        echo "  $cmd"
+
-        eval "$cmd" 2>&1 | grep -E "ERROR|WARNING|analyzing|Compiling|Built" || true
+    # Convert TCL 'set VAR value' to bash 'VAR=value'
-    fi
+    {
+        grep -E '^set [A-Z_]+ ' "$tcl_file" | while read -r _ var value; do
+            echo "${var}=${value}"
         done
 
-grep -E '^xelab ' "$TCL_FILE" | while read -r cmd; do
+        # Extract xvlog, xelab, xsim commands with bash variable expansion
-    if [[ "$cmd" != \#* ]]; then
+        grep -E '^(xvlog|xelab|xsim) ' "$tcl_file" | while read -r cmd; do
-        echo "  $cmd"
+            printf 'echo "  %s"\n' "$cmd"
-        eval "$cmd" 2>&1 | grep -E "ERROR|WARNING|Compiling|Built" || true
+            printf '%s 2>&1\n' "$cmd"
-    fi
         done
+    } > "$tmp_script"
 
-echo ""
+    chmod +x "$tmp_script"
-echo "--- Running simulation ---"
+    . "$tmp_script"
-grep -E '^xsim ' "$TCL_FILE" | while read -r cmd; do
+    rm -f "$tmp_script"
-    if [[ "$cmd" != \#* ]]; then
+}
-        eval "$cmd" 2>&1
+
-    fi
+execute_tcl "$TCL_FILE"
-done