added TBUF_X4

dataflow_neuro/cell_lib_std.act

@@ -383,6 +383,19 @@ namespace tmpl {
       }
       sizing { _en{-2}; y{-2,2} }
     }
+
+    export defcell TBUF_X4 (bool! y; bool? a, en, vdd, vss)
+    {
+      bool _en;
+      prs {
+        en => _en-
+
+      ~a & ~_en -> y+
+        a & en -> y-
+      }
+      sizing { _en{-4}; y{-4,4} }
+    }
+
     export defproc DFFQ_R_X1 (bool? clk_B, reset_B, d; bool! q,q_B; bool? vdd,vss)
     {
       bool _clk_B, __clk_B, _mqi,_mqib,_sqi,_sqib;