Merge pull request #1174 from Pinata-Consulting/mock-array-tighter-floorplan

Mock array tighter floorplan

Author: vvbandeira

flow/designs/asap7/mock-array/config.py

@@ -10,6 +10,10 @@
 # MOCK_ARRAY_TABLE (rows, cols, width, height, pitch_x, pitch_y)
 #  rows, cols       - number of Element in rows, cols
 #  width, height    - width and height of each Element
+#
+# When the pitch is equal to the width/height, we have routing by abutment
+# https://en.wikipedia.org/wiki/Pitch#Linear_measurement
+#
 #  pitch_x, pitch_y - placement pitch for each Element, in x and y direction
 # specification are in unit of placement grid
 rows, cols, ce_x, ce_y, pitch_x, pitch_y = map(int, os.environ.get("MOCK_ARRAY_TABLE").split())
@@ -26,9 +30,16 @@
 ce_margin_x = placement_grid_x * 0.5
 ce_margin_y = placement_grid_y * 0.5
 
+# PDN problems if it is smaller. Not investigated.
+array_spacing_x = margin_x * 2
+array_spacing_y = margin_y * 2
+
+array_offset_x = array_spacing_x + margin_x
+array_offset_y = array_spacing_y + margin_y
+
 # top level core and die size
-core_width  = ((placement_grid_x * pitch_x) * (cols + 1)) + (ce_width  * cols)
-core_height = ((placement_grid_y * pitch_y) * (rows + 1)) + (ce_height * rows)
+core_width  = 2 * array_spacing_x + ((placement_grid_x * pitch_x) * (cols - 1)) + ce_width
+core_height = 2 * array_spacing_y + ((placement_grid_y * pitch_y) * (rows - 1)) + ce_height
 
 die_width  = core_width  + (margin_x * 2)
 die_height = core_height + (margin_y * 2)

flow/designs/asap7/mock-array/defaults.mk

@@ -3,8 +3,10 @@
 # current unit is configured as 2.16 which is on the routing grid for M5
 
 # table of Elements - (rows cols width height pitch_x pitch_y)
-export MOCK_ARRAY_TABLE         ?= 8 8 4 4 6 6
+export MOCK_ARRAY_TABLE         ?= 8 8 4 4 5 5
 
 # Element'd data width
 export MOCK_ARRAY_DATAWIDTH     ?= 8
 
+# Must be zero for routing by abutment
+export MACRO_BLOCKAGE_HALO      ?= 0.5

flow/designs/asap7/mock-array/macro-placement.tcl

@@ -1,20 +1,16 @@
 # fish out values from single source of truth: config.py
-set vals [regexp -all -inline {\S+} [exec sh -c {cd designs/asap7/mock-array && python3 -c "import config;print(f'{config.rows} {config.cols} {config.pitch_x} {config.pitch_y} {config.margin_x} {config.margin_y} {config.placement_grid_x} {config.placement_grid_y}')"}]]
-lassign $vals rows cols pitch_x pitch_y margin_x margin_y placement_grid_x placement_grid_y
+set vals [regexp -all -inline {\S+} [exec sh -c {cd designs/asap7/mock-array && python3 -c "import config;print(f'{config.rows} {config.cols} {config.pitch_x} {config.pitch_y} {config.array_offset_x} {config.array_offset_y} {config.placement_grid_x} {config.placement_grid_y}')"}]]
+lassign $vals rows cols pitch_x pitch_y array_offset_x array_offset_y placement_grid_x placement_grid_y
 
 set block [ord::get_db_block]
 set units [$block getDefUnits]
 
 for {set row 0} {$row < $rows} {incr row} {
   for {set col 0} {$col < $cols} {incr col} {
     set inst [$block findInst [format "ces_%d_%d" $row $col]]
-    set bbox [$inst getBBox]
 
-    set w [$bbox getDX]
-    set h [$bbox getDY]
-
-    set x [expr int((($margin_x + (($placement_grid_x * $pitch_x) * ($col + 1.0))) * $units) + ($w * $col))]
-    set y [expr int((($margin_y + (($placement_grid_y * $pitch_y) * ($row + 1.0))) * $units) + ($h * $row))]
+    set x [expr int((($array_offset_x + (($placement_grid_x * $pitch_x) * $col)) * $units))]
+    set y [expr int((($array_offset_y + (($placement_grid_y * $pitch_y) * $row)) * $units))]
 
     $inst setOrient R0
     $inst setOrigin $x $y