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Separate netlist/layout for flop and precharge array.

This commit is contained in:
Matt Guthaus 2018-08-27 10:54:21 -07:00
parent 138a70fc23
commit 87f539f3a8
2 changed files with 50 additions and 30 deletions
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29
compiler/modules/ms_flop_array.py
View File

@ -30,11 +30,15 @@ class ms_flop_array(design.design):
self.height = self.ms.height self.height = self.ms.height
self.words_per_row = int(self.columns / self.word_size) self.words_per_row = int(self.columns / self.word_size)
self.create_netlist()
self.create_layout() self.create_layout()
def create_layout(self): def create_netlist(self):
self.add_pins() self.add_pins()
self.create_ms_flop_array() self.create_ms_flop_array()
def create_layout(self):
self.place_ms_flop_array()
self.add_layout_pins() self.add_layout_pins()
self.DRC_LVS() self.DRC_LVS()
@ -50,6 +54,18 @@ class ms_flop_array(design.design):
def create_ms_flop_array(self): def create_ms_flop_array(self):
self.ms_inst={} self.ms_inst={}
for i in range(0,self.columns,self.words_per_row):
name = "Xdff{0}".format(i)
index = int(i/self.words_per_row)
self.ms_inst[index]=self.add_inst(name=name,
mod=self.ms)
self.connect_inst(["din[{0}]".format(index),
"dout[{0}]".format(index),
"dout_bar[{0}]".format(index),
"clk",
"vdd", "gnd"])
def place_ms_flop_array(self):
for i in range(0,self.columns,self.words_per_row): for i in range(0,self.columns,self.words_per_row):
name = "Xdff{0}".format(i) name = "Xdff{0}".format(i)
if (i % 2 == 0 or self.words_per_row>1): if (i % 2 == 0 or self.words_per_row>1):
@ -58,18 +74,9 @@ class ms_flop_array(design.design):
else: else:
base = vector((i+1)*self.ms.width,0) base = vector((i+1)*self.ms.width,0)
mirror = "MY" mirror = "MY"
self.place_inst(name=name,
index = int(i/self.words_per_row)
self.ms_inst[index]=self.add_inst(name=name,
mod=self.ms,
offset=base, offset=base,
mirror=mirror) mirror=mirror)
self.connect_inst(["din[{0}]".format(index),
"dout[{0}]".format(index),
"dout_bar[{0}]".format(index),
"clk",
"vdd", "gnd"])
def add_layout_pins(self): def add_layout_pins(self):

47
compiler/modules/precharge_array.py
View File

@ -27,9 +27,8 @@ class precharge_array(design.design):
self.width = self.columns * self.pc_cell.width self.width = self.columns * self.pc_cell.width
self.height = self.pc_cell.height self.height = self.pc_cell.height
self.add_pins() self.create_netlist()
self.create_layout() self.create_layout()
self.DRC_LVS()
def add_pins(self): def add_pins(self):
"""Adds pins for spice file""" """Adds pins for spice file"""
@ -39,9 +38,14 @@ class precharge_array(design.design):
self.add_pin("en") self.add_pin("en")
self.add_pin("vdd") self.add_pin("vdd")
def create_netlist(self):
self.add_pins()
self.create_insts()
def create_layout(self): def create_layout(self):
self.add_insts() self.place_insts()
self.add_layout_pins() self.add_layout_pins()
self.DRC_LVS()
def add_layout_pins(self): def add_layout_pins(self):
@ -55,20 +59,8 @@ class precharge_array(design.design):
for inst in self.local_insts: for inst in self.local_insts:
self.copy_layout_pin(inst, "vdd") self.copy_layout_pin(inst, "vdd")
for i in range(len(self.local_insts)):
inst = self.local_insts[i]
def add_insts(self):
"""Creates a precharge array by horizontally tiling the precharge cell"""
self.local_insts = []
for i in range(self.columns):
name = "pre_column_{0}".format(i)
offset = vector(self.pc_cell.width * i, 0)
inst = self.add_inst(name=name,
mod=self.pc_cell,
offset=offset)
self.local_insts.append(inst)
self.connect_inst(["bl[{0}]".format(i), "br[{0}]".format(i), "en", "vdd"])
bl_pin = inst.get_pin("bl") bl_pin = inst.get_pin("bl")
self.add_layout_pin(text="bl[{0}]".format(i), self.add_layout_pin(text="bl[{0}]".format(i),
layer="metal2", layer="metal2",
@ -82,3 +74,24 @@ class precharge_array(design.design):
width=drc["minwidth_metal2"], width=drc["minwidth_metal2"],
height=bl_pin.height()) height=bl_pin.height())
def create_insts(self):
"""Creates a precharge array by horizontally tiling the precharge cell"""
self.local_insts = []
for i in range(self.columns):
name = "pre_column_{0}".format(i)
offset = vector(self.pc_cell.width * i, 0)
inst = self.add_inst(name=name,
mod=self.pc_cell,
offset=offset)
self.local_insts.append(inst)
self.connect_inst(["bl[{0}]".format(i), "br[{0}]".format(i), "en", "vdd"])
def place_insts(self):
""" Places precharge array by horizontally tiling the precharge cell"""
for i in range(self.columns):
name = "pre_column_{0}".format(i)
offset = vector(self.pc_cell.width * i, 0)
inst = self.place_inst(name=name,
offset=offset)