improved realmath test bench

tests/realmath/generate.py

@@ -63,7 +63,10 @@ for idx in range(100):
         print('  input [7:0] i;')
         print('  input [63:0] r, s;')
         print('  begin')
-        print('    $display("%d: %b %b", i, r, s);')
+        print('    if (-3 < $signed(r-s) && $signed(r-s) < +3)')
+        print('      $display("%d: %b %b", i, r, s);')
+        print('    else')
+        print('      $display("%d: %b %b %s", i, r, s, r !== s ? "TRIG" : "");')
         print('  end')
         print('endtask')
         print('initial begin #1;')