From a730fd0f10768171e165125f2b884a89c7fcee2a Mon Sep 17 00:00:00 2001
From: mrg <mrg@ucsc.edu>
Date: Wed, 14 Apr 2021 10:01:43 -0700
Subject: [PATCH] Use magic for LEF abstract. Fix supply perimter pin.

---
 compiler/base/hierarchy_layout.py |  4 +++
 compiler/base/lef.py              | 51 +++++++++++++++++++++++++++++--
 compiler/router/router.py         |  3 +-
 compiler/sram/sram_base.py        | 18 +++++++----
 4 files changed, 67 insertions(+), 9 deletions(-)

diff --git a/compiler/base/hierarchy_layout.py b/compiler/base/hierarchy_layout.py
index f10280aa..36a54937 100644
--- a/compiler/base/hierarchy_layout.py
+++ b/compiler/base/hierarchy_layout.py
@@ -124,6 +124,8 @@ class layout():
 
         if len(self.pin_map) > 0:
             for pin_set in self.pin_map.values():
+                if len(pin_set) == 0:
+                    continue
                 lowestx = min(min(pin.lx() for pin in pin_set), lowestx)
                 lowesty = min(min(pin.by() for pin in pin_set), lowesty)
             
@@ -146,6 +148,8 @@ class layout():
 
         if len(self.pin_map) > 0:
             for pin_set in self.pin_map.values():
+                if len(pin_set) == 0:
+                    continue
                 highestx = max(max(pin.rx() for pin in pin_set), highestx)
                 highesty = max(max(pin.uy() for pin in pin_set), highesty)
             
diff --git a/compiler/base/lef.py b/compiler/base/lef.py
index 942a8ac2..8ca4918b 100644
--- a/compiler/base/lef.py
+++ b/compiler/base/lef.py
@@ -7,6 +7,9 @@
 #
 import debug
 from tech import layer_names
+import os
+import shutil
+from globals import OPTS
 
 
 class lef:
@@ -23,9 +26,53 @@ class lef:
         # Round to ensure float values are divisible by 0.0025 (the manufacturing grid)
         self.round_grid = 4
 
+    def magic_lef_write(self, lef_name):
+        """ Use a magic script to perform LEF creation. """
+        debug.info(3, "Writing abstracted LEF to {0}".format(lef_name))
+
+        # Copy .magicrc file into the output directory
+        magic_file = OPTS.openram_tech + "tech/.magicrc"
+        if os.path.exists(magic_file):
+            shutil.copy(magic_file, OPTS.openram_temp)
+        else:
+            debug.warning("Could not locate .magicrc file: {}".format(magic_file))
+
+        gds_name = OPTS.openram_temp + "{}.gds".format(self.name)
+        self.gds_write(gds_name)
+
+        run_file = OPTS.openram_temp + "run_lef.sh"
+        f = open(run_file, "w")
+        f.write("#!/bin/sh\n")
+        f.write('export OPENRAM_TECH="{}"\n'.format(os.environ['OPENRAM_TECH']))
+        f.write('echo "$(date): Starting GDS to MAG using Magic {}"\n'.format(OPTS.drc_exe[1]))
+        f.write('\n')
+        f.write("{} -dnull -noconsole << EOF\n".format(OPTS.drc_exe[1]))
+        f.write("drc off\n")
+        f.write("gds polygon subcell true\n")
+        f.write("gds warning default\n")
+        f.write("gds flatten true\n")
+        f.write("gds ordering true\n")
+        f.write("gds readonly true\n")
+        f.write("gds read {}\n".format(gds_name))
+        f.write('puts "Finished reading gds {}"\n'.format(gds_name))
+        f.write("load {}\n".format(self.name))
+        f.write('puts "Finished loading cell {}"\n'.format(self.name))
+        f.write("cellname delete \\(UNNAMED\\)\n")
+        f.write("lef write {} -hide\n".format(lef_name))
+        f.write('puts "Finished writing LEF cell {}"\n'.format(self.name))
+        f.close()
+        os.system("chmod u+x {}".format(run_file))
+        from run_script import run_script
+        (outfile, errfile, resultsfile) = run_script(self.name, "lef")
+
     def lef_write(self, lef_name):
-        """Write the entire lef of the object to the file."""
-        debug.info(3, "Writing to {0}".format(lef_name))
+        """ Write the entire lef of the object to the file. """
+
+        if OPTS.drc_exe[0] == "magic":
+            self.magic_lef_write(lef_name)
+            return
+
+        debug.info(3, "Writing detailed LEF to {0}".format(lef_name))
 
         self.indent = "" # To maintain the indent level easily
 
diff --git a/compiler/router/router.py b/compiler/router/router.py
index aa01c71f..5213af4a 100644
--- a/compiler/router/router.py
+++ b/compiler/router/router.py
@@ -1215,8 +1215,9 @@ class router(router_tech):
             
         return None
             
-    def get_pin(self, pin_name):
+    def get_ll_pin(self, pin_name):
         """ Return the lowest, leftest pin group """
+
         keep_pin = None
         for index,pg in enumerate(self.pin_groups[pin_name]):
             for pin in pg.enclosures:
diff --git a/compiler/sram/sram_base.py b/compiler/sram/sram_base.py
index 753200b8..6dacdd90 100644
--- a/compiler/sram/sram_base.py
+++ b/compiler/sram/sram_base.py
@@ -248,21 +248,27 @@ class sram_base(design, verilog, lef):
 
         # Find the lowest leftest pin for vdd and gnd
         for pin_name in ["vdd", "gnd"]:
-            # Copy the pin shape to rectangles
+            # Copy the pin shape(s) to rectangles
             for pin in self.get_pins(pin_name):
                 self.add_rect(pin.layer,
                               pin.ll(),
                               pin.width(),
                               pin.height())
-            # Remove the pins
+
+            # Remove the pin shape(s)
             self.remove_layout_pin(pin_name)
 
-            pin = rtr.get_pin(pin_name)
-            
+            # Get the lowest, leftest pin
+            pin = rtr.get_ll_pin(pin_name)
+
+            # Add it as an IO pin to the perimeter
+            lowest_coord = self.find_lowest_coords()
+            pin_width = pin.rx() - lowest_coord.x
+            pin_offset = vector(lowest_coord.x, pin.by())
             self.add_layout_pin(pin_name,
                                 pin.layer,
-                                pin.ll(),
-                                pin.width(),
+                                pin_offset,
+                                pin_width,
                                 pin.height())
 
     def route_escape_pins(self):