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pull bitline labels to top level spice

This commit is contained in:
Jesse Cirimelli-Low 2020-01-20 12:16:30 +00:00
parent 364842569a
commit 5778901cfe
3 changed files with 101 additions and 63 deletions
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122
compiler/base/geometry.py
View File

@ -255,13 +255,64 @@ class instance(geometry):
p.transform(self.offset,self.mirror,self.rotate)
new_pins.append(p)
return new_pins
def calculate_transform(self, node):
#set up the rotation matrix
angle = math.radians(float(node.rotate))
mRotate = np.array([[math.cos(angle),-math.sin(angle),0.0],
[math.sin(angle),math.cos(angle),0.0],
[0.0,0.0,1.0]])
def reverse_transformation(self, cell_name):
#set up translation matrix
translateX = float(node.offset[0])
translateY = float(node.offset[1])
mTranslate = np.array([[1.0,0.0,translateX],
[0.0,1.0,translateY],
[0.0,0.0,1.0]])
#set up the scale matrix (handles mirror X)
scaleX = 1.0
if(node.mirror == 'MX'):
scaleY = -1.0
else:
scaleY = 1.0
mScale = np.array([[scaleX,0.0,0.0],
[0.0,scaleY,0.0],
[0.0,0.0,1.0]])
return (mRotate, mScale, mTranslate)
def apply_transform(self, mtransforms, uVector, vVector, origin):
origin = np.dot(mtransforms[0], origin) #rotate
uVector = np.dot(mtransforms[0], uVector) #rotate
vVector = np.dot(mtransforms[0], vVector) #rotate
origin = np.dot(mtransforms[1], origin) #scale
uVector = np.dot(mtransforms[1], uVector) #scale
vVector = np.dot(mtransforms[1], vVector) #scale
origin = np.dot(mtransforms[2], origin)
return(uVector, vVector, origin)
def apply_path_transform(self, path):
uVector = np.array([[1.0],[0.0],[0.0]])
vVector = np.array([[0.0],[1.0],[0.0]])
origin = np.array([[0.0],[0.0],[1.0]])
while(path):
instance = path.pop(-1)
mtransforms = self.calculate_transform(instance)
(uVector, vVector, origin) = self.apply_transform(mtransforms, uVector, vVector, origin)
return (uVector, vVector, origin)
def reverse_transformation_bitcell(self, cell_name):
path = []
cell_paths = []
pex_offsets = []
origin_offsets = []
Q_offsets = []
Q_bar_offsets = []
bl_offsets = []
br_offsets = []
def walk_subtree(node):
path.append(node)
@ -270,6 +321,7 @@ class instance(geometry):
cell_paths.append(copy.copy(path))
normalized_storage_nets = node.mod.get_normalized_storage_nets_offset()
normalized_bitline_nets = node.mod.get_normalized_bitline_offset()
Q_x = normalized_storage_nets[0][0]
Q_y = normalized_storage_nets[0][1]
@ -277,75 +329,35 @@ class instance(geometry):
Q_bar_x = normalized_storage_nets[1][0]
Q_bar_y = normalized_storage_nets[1][1]
bl_x = normalized_bitline_nets[0][0]
bl_y = normalized_bitline_nets[0][1]
br_x = normalized_bitline_nets[1][0]
br_y = normalized_bitline_nets[1][1]
if node.mirror == 'MX':
Q_y = -1 * Q_y
Q_bar_y = -1 * Q_bar_y
bl_y = -1 * bl_y
br_y = -1 * br_y
Q_offsets.append([Q_x, Q_y])
Q_bar_offsets.append([Q_bar_x, Q_bar_y])
bl_offsets.append([bl_x, bl_y])
br_offsets.append([br_x, br_y])
elif node.mod.insts is not []:
for instance in node.mod.insts:
walk_subtree(instance)
path.pop(-1)
def calculate_transform(node):
#set up the rotation matrix
angle = math.radians(float(node.rotate))
mRotate = np.array([[math.cos(angle),-math.sin(angle),0.0],
[math.sin(angle),math.cos(angle),0.0],
[0.0,0.0,1.0]])
#set up translation matrix
translateX = float(node.offset[0])
translateY = float(node.offset[1])
mTranslate = np.array([[1.0,0.0,translateX],
[0.0,1.0,translateY],
[0.0,0.0,1.0]])
#set up the scale matrix (handles mirror X)
scaleX = 1.0
if(node.mirror == 'MX'):
scaleY = -1.0
else:
scaleY = 1.0
mScale = np.array([[scaleX,0.0,0.0],
[0.0,scaleY,0.0],
[0.0,0.0,1.0]])
return (mRotate, mScale, mTranslate)
def apply_transform(mtransforms, uVector, vVector, origin):
origin = np.dot(mtransforms[0], origin) #rotate
uVector = np.dot(mtransforms[0], uVector) #rotate
vVector = np.dot(mtransforms[0], vVector) #rotate
origin = np.dot(mtransforms[1], origin) #scale
uVector = np.dot(mtransforms[1], uVector) #scale
vVector = np.dot(mtransforms[1], vVector) #scale
origin = np.dot(mtransforms[2], origin)
return(uVector, vVector, origin)
def apply_path_transform(path):
uVector = np.array([[1.0],[0.0],[0.0]])
vVector = np.array([[0.0],[1.0],[0.0]])
origin = np.array([[0.0],[0.0],[1.0]])
while(path):
instance = path.pop(-1)
mtransforms = calculate_transform(instance)
(uVector, vVector, origin) = apply_transform(mtransforms, uVector, vVector, origin)
return (uVector, vVector, origin)
walk_subtree(self)
for path in cell_paths:
vector_spaces = apply_path_transform(path)
vector_spaces = self.apply_path_transform(path)
origin = vector_spaces[2]
pex_offsets.append([origin[0], origin[1]])
origin_offsets.append([origin[0], origin[1]])
return(pex_offsets, Q_offsets, Q_bar_offsets)
return(origin_offsets, Q_offsets, Q_bar_offsets, bl_offsets, br_offsets)
def __str__(self):
""" override print function output """

15
compiler/bitcells/bitcell_base.py
View File

@ -99,6 +99,19 @@ class bitcell_base(design.design):
return(self.storage_net_offsets)
def get_bitline_offset(self):
self.bitline_names = ["bl", "br"]
self.bitline_offsets = []
for i in range(len(self.bitline_names)):
for text in self.gds.getTexts(layer["metal2"]):
if self.bitline_names[i] == text.textString.rstrip('\x00'):
self.bitline_offsets.append(text.coordinates[0])
for i in range(len(self.bitline_offsets)):
self.bitline_offsets[i] = tuple([self.gds.info["units"][0] * x for x in self.bitline_offsets[i]])
return(self.bitline_offsets)
def get_normalized_storage_nets_offset(self):
"""
Convert storage net offset to be relative to the bottom left corner
@ -119,6 +132,8 @@ class bitcell_base(design.design):
return normalized_storage_net_offset
def get_normalized_bitline_offset(self):
return self.get_bitline_offset()
def build_graph(self, graph, inst_name, port_nets):
"""

27
compiler/sram/sram_base.py
View File

@ -91,34 +91,45 @@ class sram_base(design, verilog, lef):
Add pex labels at the sram level for spice analysis
"""
# add pex labels for bitcell
for bank_num in range(0,len(self.bank_insts)):
# add pex labels for bitcells
for bank_num in range(len(self.bank_insts)):
bank = self.bank_insts[bank_num]
pex_offsets = bank.reverse_transformation(bank.mod.bitcell.name)
pex_offsets = bank.reverse_transformation_bitcell(bank.mod.bitcell.name)
bank_offset = pex_offsets[0] # offset bank relative to sram
Q_offset = pex_offsets[1] # offset of storage relative to bank
Q_bar_offset = pex_offsets[2] # offset of storage relative to bank
bl_offsets = pex_offsets[3]
br_offsets = pex_offsets[4]
layer_name = "metal1"
storage_layer_name = "metal1"
bitline_layer_name = "metal2"
for i in range(0,len(bank_offset)):
Q = [bank_offset[i][0] + Q_offset[i][0], bank_offset[i][1] + Q_offset[i][1]]
Q_bar = [bank_offset[i][0] + Q_bar_offset[i][0], bank_offset[i][1] + Q_bar_offset[i][1]]
bl = [bank_offset[i][0] + bl_offsets[i][0], bank_offset[i][1] + bl_offsets[i][1]]
br = [bank_offset[i][0] + br_offsets[i][0], bank_offset[i][1] + br_offsets[i][1]]
self.add_layout_pin_rect_center("bitcell_Q_b{0}_r{1}_c{2}".format(bank_num, i % OPTS.num_words, int(i / OPTS.num_words)) , layer_name, Q)
self.add_layout_pin_rect_center("bitcell_Q_bar_b{0}_r{1}_c{2}".format(bank_num, i % OPTS.num_words, int(i / OPTS.num_words)), layer_name, Q_bar)
self.add_layout_pin_rect_center("bitcell_Q_b{0}_r{1}_c{2}".format(bank_num, i % OPTS.num_words, int(i / OPTS.num_words)) , storage_layer_name, Q)
self.add_layout_pin_rect_center("bitcell_Q_bar_b{0}_r{1}_c{2}".format(bank_num, i % OPTS.num_words, int(i / OPTS.num_words)), storage_layer_name, Q_bar)
self.add_layout_pin_rect_center("bitcell_bl_b{0}_c{2}".format(bank_num, i % OPTS.num_words, int(i / OPTS.num_words)) , bitline_layer_name, bl)
self.add_layout_pin_rect_center("bitcell_br_b{0}_c{2}".format(bank_num, i % OPTS.num_words, int(i / OPTS.num_words)), bitline_layer_name, br)
# add pex labels for control logic
for i in range (0,len(self.control_logic_insts)):
for i in range (len(self.control_logic_insts)):
instance = self.control_logic_insts[i]
control_logic_offset = instance.offset
for output in instance.mod.output_list:
pin = instance.mod.get_pin(output)
pin.transform([0,0], instance.mirror, instance.rotate)
offset = [control_logic_offset[0] + pin.center()[0], control_logic_offset[1] + pin.center()[1]]
self.add_layout_pin_rect_center("{0}{1}".format(pin.name,i), "metal1", offset)
self.add_layout_pin_rect_center("{0}{1}".format(pin.name,i), storage_layer_name, offset)