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for cname, cell in ctx.cells:
if cell.type != "GENERIC_SLICE":
continue
if cname in ("$PACKER_GND", "$PACKER_VCC"):
continue
K = int(cell.params["K"])
ctx.addCellTimingClock(cell=cname, port="CLK")
for i in range(K):
ctx.addCellTimingSetupHold(cell=cname, port="I[%d]" % i, clock="CLK",
setup=ctx.getDelayFromNS(0.2), hold=ctx.getDelayFromNS(0))
ctx.addCellTimingClockToOut(cell=cname, port="Q", clock="CLK", clktoq=ctx.getDelayFromNS(0.2))
for i in range(K):
ctx.addCellTimingDelay(cell=cname, fromPort="I[%d]" % i, toPort="F", delay=ctx.getDelayFromNS(0.2))
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