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Optimizer.py
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Optimizer.py
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import Macros as M
import numpy as np
'''OPCODES = {
1: STORE, # S1 <= S2 (OP,S1,S2)
2: AND_TEM, # tem <= S1 and S2 (OP,S1,S2)
3: OR_TEM, # tem <= S1 or S2 (OP,S1,S2)
4: NOT_TEM, # tem <= not(S1) (OP,S1)
5: NOT, # S1 <= not(S2) (OP,S1,S2)
6: DELAY_STORE_TEM, # S1 <= tem after t ns (OP,S1,t) // Here S1 is not original Signal index, But delayed index
7: WAIT, # wait for t ns (OP,t)
8: STORE_TEM, # S1 <= tem (OP,S1)
9: TEM_STORE, # tem <= S1 (OP,S1)
10: TEM_AND, # tem <= tem and S1 (OP,S1)
11: TEM_OR, # tem <= tem or S1 (OP,S1)
12: TEM_NOT, # tem <= not(tem) (OP)
13: REPORT, # reports value of S1 (OP,S1)
}'''
class Kernel:
def __init__(self):
self.time = 0
self.Signal = None
self.Driver = None
self.Signal_Update_Event = None
self.Triggering_Process = None
self.Instructions = None
self.Signal_Triggered_Process = None
self.Time_Triggered_Process = None
self.Process_Trigger_Event = None
self.Event_List = []
self.Delayed_Assignment = None
self.Tem = M.VALUE_Z
self.Signal_to_Signal_Name = {}
self.Value_Map = [ 'U', 'X', '0', '1', 'Z']
def Initialize_Signal(self,Signals):
assert (len(Signals) <= M.MAX_SIGNAL) , "Total number of Signal Exceeds "+str(M.MAX_SIGNAL)
self.Signal = np.ndarray((len(Signals),),dtype=M.SIG_DATA_TYPE)
self.Signal.fill((-1,-1,-1,-1,-1))
i = 0
for signal in Signals.values():
signal.Hash_Val = i
i+=1
def Initialize_Signal_Update_Event(self,Signals):
assert (len(Signals) <= M.MAX_SIGNAL) , "Total number of Signal Exceeds "+str(M.MAX_SIGNAL)
self.Signal_Update_Event = np.ndarray((len(Signals)+1,),dtype='u1')
self.Signal_Update_Event[0] = 0 # By default head points to 0. Means Not event registered
def Initialize_Driver(self,count):
self.Driver = np.ndarray((count,),dtype='u1')
def Initialize_Instructions(self,Size):
self.Instructions = np.ndarray((Size,),dtype='u1')
def Initialize_Signal_Triggered_Process(self,Size):
self.Signal_Triggered_Process = np.ndarray((Size,),dtype=M.SIG_TRIGGERED_PROCESS_TYPE)
def Initialize_Time_Triggered_Process(self,Size):
self.Time_Triggered_Process = np.ndarray((Size,),dtype=M.TIME_TRIGGERED_PROCESS_TYPE)
def Initialize_Triggering_Process(self,Size):
self.Triggering_Process = np.ndarray((Size,),dtype='u1')
self.Triggering_Process.fill(-1)
def Initialize_Process_Trigger_Event(self,Size):
self.Process_Trigger_Event = np.ndarray((Size+1,),dtype='u1')
self.Process_Trigger_Event[0]=0 # By default head points to 0. Means No Process Triggering Scheduled
def Initialize_Delayed_Assignment(self,Size):
self.Delayed_Assignment = np.ndarray((Size,),dtype=M.DELAYED_ASSIGNMENT_TYPE)
self.Delayed_Assignment.fill((-1,-1,-1))
def Remove_Redundant_Signal_Assignments(Process_Set,Signals):
for process in Process_Set:
instructions=[]
Sig_to_Ins={}
flag = 0
for ins in process.instructions:
if(ins[0] == '<='):
Sig_to_Ins.update({ins[1]:ins})
hash_val=int(ins[1])
Signals[hash_val].Driver.update({process:-1})
flag = 1
elif( ins[0] == 'report'):
instructions.append(ins)
elif(ins[0] == 'Delay'):
instructions.append(ins)
hash_val=int(ins[1])
Signals[hash_val].Delay_Driver.append(process)
elif(ins[0] == 'wait'):
for Ins in Sig_to_Ins.values():
instructions.append(Ins)
instructions.append(ins)
Sig_to_Ins={}
flag = 0
if(flag == 1):
for Ins in Sig_to_Ins.values():
instructions.append(Ins)
process.instructions=instructions
def Get_Operator(ele,operand):
if ( ele == 'or' or ele == 'and' or ele == 'not'):
return ele
else:
operand.append(ele)
return 0
def Make_3_Adress(Sig,ins,Instructions,flag,delay_val=0,Delayed_Assignment_Collection=[]):
if(flag == 1):
Make_3_Adress(Sig,ins,Instructions,0)
last_instruction=Instructions.pop()
#print("Last Instruction : "+str(last_instruction))
if(last_instruction[0] == 1):
Instructions.append([9,last_instruction[2]])
Instructions.append([6,len(Delayed_Assignment_Collection),delay_val])
Delayed_Assignment_Collection.append(last_instruction[1])
elif(last_instruction[0] == 8):
Instructions.append([6,len(Delayed_Assignment_Collection),delay_val])
Delayed_Assignment_Collection.append(last_instruction[1])
elif(last_instruction[0] == 5):
Instructions.append(4,last_instruction[2])
Instructions.append([6,len(Delayed_Assignment_Collection),delay_val])
Delayed_Assignment_Collection.append(last_instruction[1])
else:
print("Invalid operand for delayed Assignment : "+str(last_instruction[0]))
raise Exception()
else:
assert(len(ins) > 0)
if(len(ins) == 1):
Instructions.append([1,Sig,ins[0]])
return
if(len(ins) == 2):
assert( 'not' in ins)
Instructions.append([5,Sig,ins[0]])
return
flag = 0
operand = []
for ele in ins:
operator = Get_Operator(ele,operand)
if(operator != 0):
if( operator == 'not'):
if( flag == 0 ):
Instructions.append([4,operand.pop()])
flag = 1
else:
Instructions.append([12])
elif( operator == 'and' ):
if( flag == 0 ):
Instructions.append([2,operand.pop(),operand.pop()])
flag = 1
else:
Instructions.append([10,operand.pop()])
elif( operator == 'or' ):
if( flag == 0 ):
Instructions.append([3,operand.pop(),operand.pop()])
flag = 1
else:
Instructions.append([11,operand.pop()])
Instructions.append([8,Sig])
return
def Generate_Three_Address_Code(Process_Set,Delayed_Assignment_Collection):
for process in Process_Set:
Instructions=[]
for ins in process.instructions:
if(len(ins)>2):
if(ins[0] == 'Delay'):
Make_3_Adress(ins[1],ins[2],Instructions,1,ins[3],Delayed_Assignment_Collection)
else:
Make_3_Adress(ins[1],ins[2],Instructions,0)
elif(len(ins) == 2):
if(ins[0] == 'wait'):
Instructions.append([7,ins[1]])
elif(ins[0] == 'report'):
Instructions.append([13,ins[1]])
process.instructions=Instructions
def Initialize_Driver_Array(kernel,Signals):
count = 0
for signal in Signals.values():
count+=len(signal.Driver)
count+=len(signal.Delay_Driver)
assert ( count <= M.MAX_DRIVER_SIZE) , "Total number of Driver exceeds "+str(M.MAX_DRIVER_SIZE)
kernel.Initialize_Driver(count)
index = 0
for signal in Signals.values():
signal.Driving_Head = index
count = 0
count+=len(signal.Driver)
count+=len(signal.Delay_Driver)
assert ( count <= M.MAX_SIGNAL_DRIVER) , "Maximum limit of Driver exceeded for a Signal : "+str(signal.name)
index+=count
signal.Driving_Count = count
def Initialize_Processes_And_Instructions(kernel,Process_Set):
Signal_Triggered = []
Time_Triggered = []
Total_Instruction_Word = 0
assert (len(Process_Set) <= M.MAX_PROCESS ) , "Total Number of Process exceeds "+str(M.MAX_PROCESS)
for process in Process_Set:
if(process.Id[0] == 'X'):
process.Hash_Val = len(Signal_Triggered)
Signal_Triggered.append(process)
else:
Time_Triggered.append(process)
process.Instruction_Start = Total_Instruction_Word
for ins in process.instructions:
Total_Instruction_Word += len(ins)
process.Instruction_End = Total_Instruction_Word - 1
assert ( Total_Instruction_Word <= M.MAX_INSTRUCTION_WORD) , "Maximum Allowed Instruction Word Exceeded . Limit = "+str(M.MAX_INSTRUCTION_WORD)
kernel.Initialize_Instructions(Total_Instruction_Word)
kernel.Initialize_Signal_Triggered_Process(len(Signal_Triggered))
kernel.Initialize_Process_Trigger_Event(len(Signal_Triggered))
kernel.Initialize_Time_Triggered_Process(len(Time_Triggered))
def Fill_Up_Processes(kernel,Process_Set):
time_triggered = 0
for process in Process_Set:
if(process.Hash_Val < 0):
kernel.Time_Triggered_Process[time_triggered][0] = process.Instruction_Start
kernel.Time_Triggered_Process[time_triggered][1] = process.Instruction_End
kernel.Time_Triggered_Process[time_triggered][2] = process.Instruction_Start
time_triggered += 1
else:
kernel.Signal_Triggered_Process[process.Hash_Val][0] = process.Instruction_Start
kernel.Signal_Triggered_Process[process.Hash_Val][1] = process.Instruction_End
kernel.Signal_Triggered_Process[process.Hash_Val][2] = process.Instruction_Start
kernel.Signal_Triggered_Process[process.Hash_Val][3] = 0
def Initialize_And_Fill_Up_Triggering_Process(kernel,Signals):
Total_Count = 0
for signal in Signals.values():
if(len(signal.processes) > 0):
signal.Triggering_Process_Start = Total_Count
Total_Count += len(signal.processes)
assert ( Total_Count <= M.MAX_TRIGGERING_PROCESS) , "Total Triggering Process Exceeds "+str(M.MAX_TRIGGERING_PROCESS)
kernel.Initialize_Triggering_Process(Total_Count)
for signal in Signals.values():
for i in range(0,len(signal.processes)):
kernel.Triggering_Process[signal.Triggering_Process_Start + i] = signal.processes[i][1].Hash_Val
def Fill_Up_Signals(kernel,Signals):
for signal in Signals.values():
kernel.Signal[signal.Hash_Val][0] = M.VALUE_Z
kernel.Signal[signal.Hash_Val][1] = signal.Driving_Head
kernel.Signal[signal.Hash_Val][2] = 0 # Initially Number of Driving values = 0
if(signal.Triggering_Process_Start < 0):
kernel.Signal[signal.Hash_Val][3] = M.NON_TRIGGERING
else:
kernel.Signal[signal.Hash_Val][3] = signal.Triggering_Process_Start
kernel.Signal[signal.Hash_Val][4] = len(signal.processes)
kernel.Signal_to_Signal_Name.update({ signal.Hash_Val : signal.name})
def Resolve_And_Fill_Up_Instruction(kernel,Signals,Process_Set):
for process in Process_Set:
for ins in process.instructions:
if( ins[0] != 6 and ins[0] != 7 and ins[0] != 12 ):
for i in range(1,len(ins)):
if('Val' in ins[i]):
if( '1' in ins[i]):
ins[i] = M.VALUE_1
elif('0' in ins[i]):
ins[i] = M.VALUE_0
elif('U' in ins[i]):
ins[i] = M.VALUE_U
elif('X' in ins[i]):
ins[i] = M.VALUE_X
else:
raise Exception("Unknown Std_Value other than 1,0,X,U given by input")
else:
hash_val = int(ins[i])
ins[i] = Signals[hash_val].Hash_Val
for process in Process_Set:
index = 0
for ins in process.instructions:
for word in ins:
kernel.Instructions[process.Instruction_Start+index] = word
index += 1
def Initialize_And_Fill_Up_Delayed_Assignment(kernel,Signals,Delayed_Assignment_Collection):
assert ( len(Delayed_Assignment_Collection) <= M.MAX_DELAYED_ASSIGNMENTS) , "Total Number of Delayed Assignments exceeds "+str(M.MAX_DELAYED_ASSIGNMENTS)
kernel.Initialize_Delayed_Assignment(len(Delayed_Assignment_Collection))
for i in range(0,len(Delayed_Assignment_Collection)):
sig_index = Signals[int(Delayed_Assignment_Collection[i])].Hash_Val
kernel.Delayed_Assignment[i][1] = sig_index
kernel.Delayed_Assignment[i][2] = M.VALUE_Z
def Initialize_Event_List(kernel):
kernel.Event_List.append([kernel.time])
for i in range(0,kernel.Time_Triggered_Process.shape[0]):
kernel.Event_List[0].append(kernel.Time_Triggered_Process[i])
for i in range(0,kernel.Delayed_Assignment.shape[0]):
kernel.Event_List[0].append(kernel.Delayed_Assignment[i])
def Initialize_kernel(kernel,Signals,Process_Set,Delayed_Assignment_Collection):
kernel.Initialize_Signal(Signals)
kernel.Initialize_Signal_Update_Event(Signals)
Initialize_Driver_Array(kernel,Signals)
Initialize_Processes_And_Instructions(kernel,Process_Set)
Fill_Up_Processes(kernel,Process_Set)
Initialize_And_Fill_Up_Triggering_Process(kernel,Signals)
Fill_Up_Signals(kernel,Signals)
Resolve_And_Fill_Up_Instruction(kernel,Signals,Process_Set)
Initialize_And_Fill_Up_Delayed_Assignment(kernel,Signals,Delayed_Assignment_Collection)
Initialize_Event_List(kernel)
def Optimizer(Signals,Process_Set):
Remove_Redundant_Signal_Assignments(Process_Set,Signals)
Delayed_Assignment_Collection=[]
Generate_Three_Address_Code(Process_Set,Delayed_Assignment_Collection)
kernel = Kernel()
Initialize_kernel(kernel,Signals,Process_Set,Delayed_Assignment_Collection)
return kernel