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Exclude bitcells in other local areas not of interest

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This commit is contained in:
mrg
2020-09-29 12:15:42 -07:00
parent 0c280e062a
commit 449a4c2660
6 changed files with 55 additions and 18 deletions
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compiler/modules/global_bitcell_array.py
+29 -4
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@@ -272,15 +272,27 @@ class global_bitcell_array(bitcell_base_array.bitcell_base_array):
"""
Excludes bits in column from being added to graph except target
"""
# This must find which local array includes the specified column
# Find the summation of columns that is large and take the one before
for i, col in enumerate(self.col_offsets):
if col > targ_col:
break
else:
i = len(self.local_mods)
# This is the array with the column
local_array = self.local_mods[i - 1]
# We must also translate the global array column number to the local array column number
self.local_mods[i - 1].graph_exclude_bits(targ_row, targ_col - self.col_offsets[i - 1])
local_col = targ_col - self.col_offsets[i - 1]
for mod in self.local_mods:
if mod == local_array:
mod.graph_exclude_bits(targ_row, local_col)
else:
# Otherwise, we exclude ALL of the rows/columns
mod.graph_exclude_bits()
def graph_exclude_replica_col_bits(self):
"""
Exclude all but replica in every local array.
@@ -300,8 +312,15 @@ class global_bitcell_array(bitcell_base_array.bitcell_base_array):
else:
# In this case, we it should be in the last bitcell array
i = len(self.col_offsets)
return self.local_mods[i - 1].get_cell_name(inst_name + '.x' + self.local_insts[i - 1].name, row, col)
# This is the local instance
local_inst = self.local_insts[i - 1]
# This is the array with the column
local_array = self.local_mods[i - 1]
# We must also translate the global array column number to the local array column number
local_col = col - self.col_offsets[i - 1]
return local_array.get_cell_name(inst_name + '.x' + local_inst.name, row, local_col)
def clear_exclude_bits(self):
"""
@@ -309,3 +328,9 @@ class global_bitcell_array(bitcell_base_array.bitcell_base_array):
"""
for mod in self.local_mods:
mod.clear_exclude_bits()
def graph_exclude_dffs(self):
"""Exclude dffs from graph as they do not represent critical path"""
self.graph_inst_exclude.add(self.ctrl_dff_inst)