Connect dff array clk in rows and columns.

compiler/modules/dff_array.py

@@ -78,7 +78,7 @@ class dff_array(design.design):
                                 layer="metal1",
                                 offset=vdd_pin.ll(),
                                 width=self.width,
-                                height=drc["minwidth_metal1"])
+                                height=self.m1_width)
 
             # Continous gnd rail along with label.
             gnd_pin=self.dff_insts[0,y].get_pin("gnd")
@@ -86,12 +86,13 @@ class dff_array(design.design):
                                 layer="metal1",
                                 offset=gnd_pin.ll(),
                                 width=self.width,
-                                height=drc["minwidth_metal1"])
+                                height=self.m1_width)
             
 
         for y in range(self.rows):            
             for x in range(self.columns):            
                 din_pin = self.dff_insts[x,y].get_pin("d")
+                debug.check(din_pin.layer=="metal2","DFF d pin not on metal2")
                 self.add_layout_pin(text="din[{0}][{1}]".format(x,y),
                                     layer=din_pin.layer,
                                     offset=din_pin.ll(),
@@ -99,20 +100,41 @@ class dff_array(design.design):
                                     height=din_pin.height())
 
                 dout_pin = self.dff_insts[x,y].get_pin("q")
+                debug.check(dout_pin.layer=="metal2","DFF q pin not on metal2")
                 self.add_layout_pin(text="dout[{0}][{1}]".format(x,y),
-                                    layer="metal1",
+                                    layer=dout_pin.layer,
                                     offset=dout_pin.ll(),
                                     width=dout_pin.width(),
                                     height=dout_pin.height())
 
-            
-        # # Continous clk rail along with label.
-        # self.add_layout_pin(text="clk",
-        #                     layer="metal1",
-        #                     offset=self.dff_insts[0].get_pin("clk").ll().scale(0,1),
-        #                     width=self.width,
-        #                     height=drc["minwidth_metal1"])
 
+        # Create vertical spines to a single horizontal rail
+        clk_pin = self.dff_insts[0,0].get_pin("clk")
+        debug.check(clk_pin.layer=="metal2","DFF clk pin not on metal2")
+        if self.columns==1:
+            self.add_layout_pin(text="clk",
+                                layer="metal2",
+                                offset=clk_pin.ll().scale(1,0),
+                                width=self.m2_width,
+                                height=self.height)
+        else:
+            self.add_layout_pin(text="clk",
+                                layer="metal3",
+                                offset=clk_pin.ll().scale(0,1),
+                                width=self.width,
+                                height=self.m3_width)
+            for x in range(self.columns):
+                clk_pin = self.dff_insts[x,0].get_pin("clk")
+                # Make a vertical strip for each column
+                self.add_layout_pin(text="clk",
+                                    layer="metal2",
+                                    offset=clk_pin.ll().scale(1,0),
+                                    width=self.m2_width,
+                                    height=self.height)
+                # Drop a via to the M3 pin
+                self.add_via_center(layers=("metal2","via2","metal3"),
+                                    offset=clk_pin.center())
+                
         
 
     def analytical_delay(self, slew, load=0.0):

compiler/tests/11_dff_array_test.py

@@ -21,10 +21,18 @@ class dff_array_test(openram_test):
 
         import dff_array
 
-        debug.info(2, "Testing dff_array for columns=3, word_size=3")
+        debug.info(2, "Testing dff_array for 3x3")
         a = dff_array.dff_array(rows=3, columns=3)
         self.local_check(a)
 
+        debug.info(2, "Testing dff_array for 1x3")
+        a = dff_array.dff_array(rows=1, columns=3)
+        self.local_check(a)
+
+        debug.info(2, "Testing dff_array for 3x1")
+        a = dff_array.dff_array(rows=3, columns=1)
+        self.local_check(a)
+
         OPTS.check_lvsdrc = True
         globals.end_openram()
 

technology/scn3me_subm/mag_lib/dff.mag

@@ -1,6 +1,6 @@
 magic
 tech scmos
-timestamp 1518652803
+timestamp 1518655545
 << nwell >>
 rect -8 48 104 105
 << pwell >>
@@ -232,20 +232,18 @@ rect 31 51 51 54
 rect 58 53 70 56
 rect 90 93 94 94
 rect 2 49 30 50
-rect 34 46 38 47
-rect 17 43 38 46
-rect 10 34 21 37
+rect 17 43 34 46
+rect 14 34 21 37
 rect 58 37 61 53
 rect 90 51 94 54
-rect 77 48 94 51
+rect 77 48 90 51
 rect 70 41 81 44
 rect 25 34 55 37
-rect 10 33 14 34
 rect 2 25 6 26
 rect 10 25 14 26
 rect 27 23 30 34
 rect 59 34 61 37
-rect 90 31 94 48
+rect 90 31 94 47
 rect 79 28 94 31
 rect 90 25 94 28
 rect 39 19 49 22
@@ -277,6 +275,9 @@ rect 18 70 22 74
 rect 66 70 70 74
 rect 18 57 22 61
 rect 2 50 6 54
+rect 34 43 38 47
+rect 10 33 14 37
+rect 90 47 94 51
 rect 66 40 70 44
 rect 2 26 6 30
 rect 18 16 22 20
@@ -292,7 +293,7 @@ rect -2 0 98 100
 << labels >>
 rlabel metal1 23 100 23 100 5 vdd
 rlabel metal1 38 -1 38 -1 1 gnd
-rlabel metal1 11 34 11 34 1 clk
-rlabel metal1 24 44 24 44 1 d
-rlabel metal1 92 37 92 37 1 q
+rlabel m2contact 11 34 11 34 1 clk
+rlabel m2contact 36 45 36 45 1 d
+rlabel m2contact 91 49 91 49 1 q
 << end >>