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Don't obstruct control logic signals with dffs when no column mux.

This commit is contained in:
mrg 2020-07-29 10:31:18 -07:00
parent b4dafac489
commit f23d2e36a7
1 changed files with 8 additions and 2 deletions
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10
compiler/sram/sram_1bank.py
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@ -160,7 +160,10 @@ class sram_1bank(sram_base):
port = 0
# Add the col address flops below the bank to the right of the control logic
x_offset = self.control_logic_insts[port].rx() + self.dff.width
y_offset = - self.data_bus_size[port] - self.dff.height
# Place it a data bus below the x-axis, but at least as low as the control logic to not block
# the control logic signals
y_offset = min(-self.data_bus_size[port] - self.dff.height,
self.control_logic_insts[port].by())
if self.col_addr_dff:
self.col_addr_pos[port] = vector(x_offset,
y_offset)
@ -201,7 +204,10 @@ class sram_1bank(sram_base):
# Add the col address flops below the bank to the right of the control logic
x_offset = self.control_logic_insts[port].lx() - 2 * self.dff.width
y_offset = self.bank.height + self.data_bus_size[port] + self.dff.height
# Place it a data bus below the x-axis, but at least as high as the control logic to not block
# the control logic signals
y_offset = max(self.bank.height + self.data_bus_size[port] + self.dff.height,
self.control_logic_insts[port].uy() - self.dff.height)
if self.col_addr_dff:
self.col_addr_pos[port] = vector(x_offset,
y_offset)