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Cleaned up control logic cycle creation in delay.py. Fixed bug which caused input data to be determined by the read ports.

This commit is contained in:
Hunter Nichols 2018-09-10 22:06:50 -07:00
parent da6843af5b
commit 91bbc556e8
3 changed files with 60 additions and 55 deletions
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83
compiler/characterizer/delay.py
View File

@ -64,8 +64,6 @@ class delay():
debug.error("Given probe_data is not an integer to specify a data bit",1)
#Adding port options here which the characterizer cannot handle. Some may be added later like ROM
if len(self.targ_write_ports) == 0 and len(self.targ_read_ports) == 0:
debug.error("No ports selected for characterization.",1)
if len(self.read_ports) == 0:
debug.error("Characterizer does not currently support SRAMs without read ports.",1)
if len(self.write_ports) == 0:
@ -453,10 +451,6 @@ class delay():
This simulates a disabled SRAM to get the leakage power when it is off.
"""
#Select any available port. Does not need to be specified for leakage power.
#Doing this just passes a debug check and nothing else. Put on TODO to remove...
self.targ_read_ports = [self.get_available_port(get_read_port=True)]
debug.info(1, "Performing leakage power simulations.")
self.write_power_stimulus(trim=False)
self.stim.run_sim()
@ -658,16 +652,16 @@ class delay():
# sys.exit(1)
#For debugging, skips characterization and returns dummy values.
char_data = self.char_data
i = 1.0
for slew in slews:
for load in loads:
for k,v in char_data.items():
char_data[k].append(i)
i+=1.0
char_data["min_period"] = i
char_data["leakage_power"] = i+1.0
return char_data
# char_data = self.char_data
# i = 1.0
# for slew in slews:
# for load in loads:
# for k,v in char_data.items():
# char_data[k].append(i)
# i+=1.0
# char_data["min_period"] = i
# char_data["leakage_power"] = i+1.0
# return char_data
# 1) Find a feasible period and it's corresponding delays using the trimmed array.
(feasible_delays_lh, feasible_delays_hl) = self.find_feasible_period()
@ -743,11 +737,7 @@ class delay():
def add_noop_one_port(self, address, data, port):
""" Add the control values for a noop to a single port. """
#This is to be used as a helper function for the other add functions. Cycle and comments are omitted.
self.csb_values[port].append(1)
#If port is in both lists, add rw control signal. Condition indicates its a RW port.
if port < len(self.web_values):
self.web_values[port].append(1)
self.add_control_one_port(port, "noop")
if port in self.write_ports:
self.add_data(data,port)
self.add_address(address, port)
@ -773,10 +763,7 @@ class delay():
port))
self.cycle_times.append(self.t_current)
self.t_current += self.period
self.csb_values[port].append(0)
#If port is in both lists, add rw control signal. Condition indicates its a RW port.
if port < len(self.web_values):
self.web_values[port].append(1)
self.add_control_one_port(port, "read")
#If the port is also a readwrite then add data.
if port in self.write_ports:
@ -799,11 +786,8 @@ class delay():
port))
self.cycle_times.append(self.t_current)
self.t_current += self.period
self.csb_values[port].append(0)
#If port is in both lists, add rw control signal. Condition indicates its a RW port.
if port < len(self.web_values):
self.web_values[port].append(0)
self.add_control_one_port(port, "write")
self.add_data(data,port)
self.add_address(address,port)
@ -814,6 +798,25 @@ class delay():
if unselected_port != port:
self.add_noop_one_port(address, noop_data, unselected_port)
def add_control_one_port(self, port, op):
"""Appends control signals for operation to a given port"""
#Determine values to write to port
web_val = 1
csb_val = 1
if op == "read":
csb_val = 0
elif op == "write":
csb_val = 0
web_val = 0
elif op != "noop":
debug.error("Could not add control signals for port {0}. Command {1} not recognized".format(port,op),1)
#Append the values depending on the type of port
self.csb_values[port].append(csb_val)
#If port is in both lists, add rw control signal. Condition indicates its a RW port.
if port < len(self.web_values):
self.web_values[port].append(web_val)
def gen_test_cycles_one_port(self, read_port, write_port):
"""Intended but not implemented: Returns a list of key time-points [ns] of the waveform (each rising edge)
of the cycles to do a timing evaluation of a single port. Current: Values overwritten for multiple calls"""
@ -890,7 +893,10 @@ class delay():
"""Returns a list of key time-points [ns] of the waveform (each rising edge)
of the cycles to do a timing evaluation. The last time is the end of the simulation
and does not need a rising edge."""
#Using this requires setting at least one port to target for simulation.
if len(self.targ_write_ports) == 0 and len(self.targ_read_ports) == 0:
debug.error("No ports selected for characterization.",1)
# Start at time 0
self.t_current = 0
@ -906,7 +912,7 @@ class delay():
self.csb_values = [[] for i in range(self.total_port_num)]
# Address and data values for each address/data bit. A dict of 3d lists of size #ports x bits x cycles.
self.data_values=[[[] for i in range(self.addr_size)]]*len(self.read_ports)
self.data_values=[[[] for i in range(self.addr_size)]]*len(self.write_ports)
self.addr_values=[[[] for i in range(self.addr_size)]]*self.total_port_num
#Get any available read/write port in case only a single write or read ports is being characterized.
@ -978,10 +984,10 @@ class delay():
def gen_data(self):
""" Generates the PWL data inputs for a simulation timing test. """
for read_port in self.read_ports:
for write_port in self.write_ports:
for i in range(self.word_size):
sig_name="DIN{0}[{1}] ".format(read_port, i)
self.stim.gen_pwl(sig_name, self.cycle_times, self.data_values[read_port][i], self.period, self.slew, 0.05)
sig_name="DIN{0}[{1}] ".format(write_port, i)
self.stim.gen_pwl(sig_name, self.cycle_times, self.data_values[write_port][i], self.period, self.slew, 0.05)
def gen_addr(self):
"""
@ -1016,11 +1022,10 @@ class delay():
self.read_ports.append(readwrite_port_num)
self.write_ports.append(readwrite_port_num)
#This placement is intentional. It makes indexing input data easier. See self.data_values
for read_port_num in range(OPTS.num_rw_ports, OPTS.num_r_ports):
self.read_ports.append(read_port_num)
for write_port_num in range(OPTS.num_rw_ports+OPTS.num_r_ports, OPTS.num_w_ports):
for write_port_num in range(OPTS.num_rw_ports, OPTS.num_rw_ports+OPTS.num_w_ports):
self.write_ports.append(write_port_num)
for read_port_num in range(OPTS.num_rw_ports+OPTS.num_w_ports, OPTS.num_rw_ports+OPTS.num_w_ports+OPTS.num_r_ports):
self.read_ports.append(read_port_num)
#Set the default target ports for simulation. Default is all the ports.
self.targ_read_ports = self.read_ports

4
compiler/characterizer/lib.py
View File

@ -13,7 +13,7 @@ class lib:
def __init__(self, out_dir, sram, sp_file, use_model=OPTS.analytical_delay):
#Temporary Workaround to here to set num of ports. Crashes if set in config file.
OPTS.num_rw_ports = 2
#OPTS.num_rw_ports = 2
#OPTS.num_r_ports = 1
#OPTS.num_w_ports = 1
@ -424,7 +424,7 @@ class lib:
self.lib.write(" capacitance : {0}; \n".format(tech.spice["dff_in_cap"]))
#Add power values for the ports. lib generated with this is not syntactically correct. TODO once
#top level is done
#top level is done.
for port in range(self.total_port_num):
self.add_clk_control_power(port)

28
compiler/characterizer/setup_hold.py
View File

@ -278,21 +278,21 @@ class setup_hold():
HL_hold = []
#For debugging, skips characterization and returns dummy values.
i = 1.0
for self.related_input_slew in related_slews:
for self.constrained_input_slew in constrained_slews:
LH_setup.append(i)
HL_setup.append(i+1.0)
LH_hold.append(i+2.0)
HL_hold.append(i+3.0)
i+=4.0
# i = 1.0
# for self.related_input_slew in related_slews:
# for self.constrained_input_slew in constrained_slews:
# LH_setup.append(i)
# HL_setup.append(i+1.0)
# LH_hold.append(i+2.0)
# HL_hold.append(i+3.0)
# i+=4.0
times = {"setup_times_LH": LH_setup,
"setup_times_HL": HL_setup,
"hold_times_LH": LH_hold,
"hold_times_HL": HL_hold
}
return times
# times = {"setup_times_LH": LH_setup,
# "setup_times_HL": HL_setup,
# "hold_times_LH": LH_hold,
# "hold_times_HL": HL_hold
# }
# return times
for self.related_input_slew in related_slews: