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Fixes to get hspice delay test to pass.

This commit is contained in:
mrg 2021-03-02 09:28:41 -08:00
parent fb953c19e8
commit 90cb9f581f
2 changed files with 7 additions and 8 deletions
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6
compiler/characterizer/delay.py
View File

@ -418,9 +418,9 @@ class delay(simulation):
t_rise=self.slew, t_rise=self.slew,
t_fall=self.slew) t_fall=self.slew)
self.load_all_measure_nets() # self.load_all_measure_nets()
self.write_delay_measures() self.write_delay_measures()
self.write_simulation_saves() # self.write_simulation_saves()
# run until the end of the cycle time # run until the end of the cycle time
self.stim.write_control(self.cycle_times[-1] + self.period) self.stim.write_control(self.cycle_times[-1] + self.period)
@ -616,7 +616,7 @@ class delay(simulation):
def load_all_measure_nets(self): def load_all_measure_nets(self):
measurement_nets = set() measurement_nets = set()
for port, meas in zip(self.targ_read_ports*len(self.read_meas_lists) + for port, meas in zip(self.targ_read_ports * len(self.read_meas_lists) +
self.targ_write_ports * len(self.write_meas_lists), self.targ_write_ports * len(self.write_meas_lists),
self.read_meas_lists + self.write_meas_lists): self.read_meas_lists + self.write_meas_lists):
for measurement in meas: for measurement in meas:

9
compiler/characterizer/stimuli.py
View File

@ -246,15 +246,14 @@ class stimuli():
reltol = 0.001 # 0.1% reltol = 0.001 # 0.1%
timestep = 10 # ps, was 5ps but ngspice was complaining the timestep was too small in certain tests. timestep = 10 # ps, was 5ps but ngspice was complaining the timestep was too small in certain tests.
# UIC is needed for ngspice to converge
self.sf.write(".TEMP {}\n".format(self.temperature)) self.sf.write(".TEMP {}\n".format(self.temperature))
if OPTS.spice_name == "ngspice": if OPTS.spice_name == "ngspice":
# UIC is needed for ngspice to converge
self.sf.write(".TRAN {0}p {1}n UIC\n".format(timestep, end_time))
# ngspice sometimes has convergence problems if not using gear method # ngspice sometimes has convergence problems if not using gear method
# which is more accurate, but slower than the default trapezoid method # which is more accurate, but slower than the default trapezoid method
# Do not remove this or it may not converge due to some "pa_00" nodes # Do not remove this or it may not converge due to some "pa_00" nodes
# unless you figure out what these are. # unless you figure out what these are.
self.sf.write(".TRAN {0}p {1}n UIC\n".format(timestep, end_time))
self.sf.write(".OPTIONS POST=1 RELTOL={0} PROBE method=gear\n".format(reltol)) self.sf.write(".OPTIONS POST=1 RELTOL={0} PROBE method=gear\n".format(reltol))
elif OPTS.spice_name == "spectre": elif OPTS.spice_name == "spectre":
self.sf.write("simulator lang=spectre\n") self.sf.write("simulator lang=spectre\n")
@ -275,7 +274,7 @@ class stimuli():
' annotate=status maxiters=5 \n'.format("5p", end_time)) ' annotate=status maxiters=5 \n'.format("5p", end_time))
self.sf.write("simulator lang=spice\n") self.sf.write("simulator lang=spice\n")
else: else:
self.sf.write(".TRAN 5p {0}n \n".format(end_time)) self.sf.write(".TRAN {0}p {1}n UIC\n".format(timestep, end_time))
self.sf.write(".OPTIONS POST=1 RUNLVL={0} PROBE\n".format(runlvl)) self.sf.write(".OPTIONS POST=1 RUNLVL={0} PROBE\n".format(runlvl))
if OPTS.spice_name == "hspice": # for cadence plots if OPTS.spice_name == "hspice": # for cadence plots
self.sf.write(".OPTIONS PSF=1 \n") self.sf.write(".OPTIONS PSF=1 \n")
@ -350,7 +349,7 @@ class stimuli():
valid_retcode = 0 valid_retcode = 0
elif OPTS.spice_name == "hspice": elif OPTS.spice_name == "hspice":
# TODO: Should make multithreading parameter a configuration option # TODO: Should make multithreading parameter a configuration option
cmd = "{0} -d -mt {1} -i {2} -o {3}timing".format(OPTS.spice_exe, cmd = "{0} -mt {1} -i {2} -o {3}timing".format(OPTS.spice_exe,
OPTS.num_sim_threads, OPTS.num_sim_threads,
temp_stim, temp_stim,
OPTS.openram_temp) OPTS.openram_temp)