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Added max gap size for wmask and edited max gap size for data ff's to take into account m3 spacing.

This commit is contained in:
jsowash 2019-08-29 16:41:58 -07:00
parent a78245786c
commit bbe235074c
1 changed files with 13 additions and 9 deletions
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22
compiler/sram/sram_1bank.py
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@ -70,10 +70,14 @@ class sram_1bank(sram_base):
wmask_pos = [None]*len(self.all_ports)
data_pos = [None]*len(self.all_ports)
# This is M2 pitch even though it is on M1 to help stem via spacings on the trunk
# The M1 pitch is for supply rail spacings
max_gap_size = self.m2_pitch*max(self.word_size+1,self.col_addr_size+1) + 2*self.m1_pitch
if self.write_size:
max_gap_size = self.m3_pitch*max(self.word_size+1,self.col_addr_size+1) + 2*self.m1_pitch
max_gap_size_wmask = self.m2_pitch*self.num_wmasks + 2*self.m1_pitch
else:
# This is M2 pitch even though it is on M1 to help stem via spacings on the trunk
# The M1 pitch is for supply rail spacings
max_gap_size = self.m2_pitch*max(self.word_size+1,self.col_addr_size+1) + 2*self.m1_pitch
# Port 0
port = 0
@ -81,12 +85,12 @@ class sram_1bank(sram_base):
if self.write_size:
# Add the write mask flops below the write mask AND array.
wmask_pos[port] = vector(self.bank.bank_array_ll.x,
-0.5 * max_gap_size - self.dff.height)
-max_gap_size_wmask - self.dff.height)
self.wmask_dff_insts[port].place(wmask_pos[port])
# Add the data flops below the write mask flops.
data_pos[port] = vector(self.bank.bank_array_ll.x,
-2 * max_gap_size - 2 * self.dff.height)
-max_gap_size - max_gap_size_wmask - 2 * self.dff.height)
self.data_dff_insts[port].place(data_pos[port])
else:
# Add the data flops below the bank to the right of the lower-left of bank array
@ -107,7 +111,7 @@ class sram_1bank(sram_base):
if self.col_addr_dff:
if self.write_size:
col_addr_pos[port] = vector(self.bank.bank_array_ll.x - self.col_addr_dff_insts[port].width - self.bank.m2_gap,
-0.5*max_gap_size - self.col_addr_dff_insts[port].height)
-max_gap_size_wmask - self.col_addr_dff_insts[port].height)
else:
col_addr_pos[port] = vector(self.bank.bank_array_ll.x - self.col_addr_dff_insts[port].width - self.bank.m2_gap,
-max_gap_size - self.col_addr_dff_insts[port].height)
@ -135,12 +139,12 @@ class sram_1bank(sram_base):
if self.write_size:
# Add the write mask flops below the write mask AND array.
wmask_pos[port] = vector(self.bank.bank_array_ur.x - self.data_dff_insts[port].width,
self.bank.height + 0.5*max_gap_size + self.dff.height)
self.bank.height + max_gap_size_wmask + self.dff.height)
self.wmask_dff_insts[port].place(wmask_pos[port], mirror="MX")
# Add the data flops below the write mask flops
data_pos[port] = vector(self.bank.bank_array_ur.x - self.data_dff_insts[port].width,
self.bank.height + 2*max_gap_size + 2*self.dff.height)
self.bank.height + max_gap_size_wmask + max_gap_size + 2*self.dff.height)
self.data_dff_insts[port].place(data_pos[port], mirror="MX")
else:
# Add the data flops above the bank to the left of the upper-right of bank array