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function definitions #28

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300 changes: 260 additions & 40 deletions simulator.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,111 +4,247 @@
f = open('test1.txt', 'r')
data = f.readlines()
abi2register = {
"x0": 0,
"x1": 0,
"x2": 0,
"x3": 0,
"x4": 0,
"x5": 0,
"x6": 0,
"x7": 0,
"x8": 0,
"x8": 0,
"x9": 0,
"x10": 0,
"x11": 0,
"x12": 0,
"x13": 0,
"x14": 0,
"x15": 0,
"x16": 0,
"x17": 0,
"x18": 0,
"x19": 0,
"x20": 0,
"x21": 0,
"x22": 0,
"x23": 0,
"x24": 0,
"x25": 0,
"x26": 0,
"x27": 0,
"x28": 0,
"x29": 0,
"x30": 0,
"x31": 0,
"x0": 0,#hard wired zero
"x1": 0,#return address
"x2": 0,#stack pointer
"x3": 0,#global pointer
"x4": 0,#thread pointer
"x5": 0,#temporary/alternate link register
"x6": 0,#temporaries
"x7": 0,#temporaries
"x8": 0,#saved register/frame pointer
"x9": 0,#saved register
"x10": 0,#function arguments/return values
"x11": 0,#function arguments/return values
"x12": 0,#function arguments
"x13": 0,#function arguments
"x14": 0,#function arguments
"x15": 0,#function arguments
"x16": 0,#function arguments
"x17": 0,#function arguments
"x18": 0,#saved register
"x19": 0,#saved register
"x20": 0,#saved register
"x21": 0,#saved register
"x22": 0,#saved register
"x23": 0,#saved register
"x24": 0,#saved register
"x25": 0,#saved register
"x26": 0,#saved register
"x27": 0,#saved register
"x28": 0,#temporaries
"x29": 0,#temporaries
"x30": 0,#temporaries
"x31": 0,#temporaries
}

def func(r):#binary in string -> x(int) in string
return f"x{int(r,2)}"#"100" 100

def sign_extend(value, bits):
mask = 1 << (bits - 1)
return (value & ((1 << bits) - 1)) - (value & mask)

def r_add(data):
rd = func(data[-12:-7])
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
abi2register[rd] = abi2register[rs1] + abi2register[rs2]
return None

def r_sub(data):
rd = func(data[-12:-7])
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
abi2register[rd] = abi2register[rs1] - abi2register[rs2]
return None

def r_sll(data):

return None

def r_slt(data):
rd = func(data[-12:-7])
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
if abi2register[rs1]<abi2register[rs2]:
abi2register[rd]=1
return None

def r_sltu(data):
rd = func(data[-12:-7])
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
if abi2register[rs1] < abi2register[rs2] :
abi2register[rd] = 1
return None

def r_xor(data):
rd = func(data[-12:-7])
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
abi2register[rd] = abi2register[rs1] ^ abi2register[rs2]
return None

def r_srl(data):
return None

def r_or(data):
rd = func(data[-12:-7])
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
abi2register[rd] = abi2register[rs1] | abi2register[rs2]
return None

def r_and(data):
rd = func(data[-12:-7])
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
abi2register[rd] = abi2register[rs1] & abi2register[rs2]
return None

def i_lw(data):
def i_lw(data):#doubt
immd = sign_extend(int(data[-31:-20],2),12)
rs1 = func(data[-20:-15])
rd = func(data[-12:-7])
abi2register[rd] = abi2register[rs1] + immd
return None

def i_addi(data):
imm = sign_extend(int(data[-31:-20], 2), 12)
rs1 = func(data[-20:-15])
rd = func(data[-12:-7])
abi2register[rd] = abi2register[rs1] + imm
return None

def i_sltiu(data):
imm = sign_extend(int(data[-31:-20], 2), 12)
rs1 = func(data[-20:-15])
rd = func(data[-12:-7])
if abi2register[rs1] < imm :# not unsigned
abi2register[rd] =1
return None

def i_jalr(data):
def i_jalr(data):#doubt
rd = func(data[-12:-7])
abi2register[rd] = pc
offset = sign_extend(int(data[-31:-20], 2), 12)
pc = abi2register["x6"] + offset
val = str(pc)
val = val[:-1]
val = val+"0"
pc = int(val)
run(pc)
pc = abi2register[rd]
return None

def s_sw(data):
def s_sw(data):#doubt
imm = sign_extend(int(data[-31:-25]+data[-12:-7], 2), 12)
rs2 = func(data[-25:-20])
rs1 = func(data[-20:-15])
return None

def b_beq(data):
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
imm = sign_extend(int(data[-31:-25]+data[-12:-7], 2), 12) #alterations required
if abi2register[rs1]==abi2register[rs2]:
abi2register["x1"] = pc
pc += imm
run(pc)
pc = abi2register["x1"]
return None

def b_bne(data):
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
imm = sign_extend(int(data[-31:-25]+data[-12:-7], 2), 12) #alterations required
if abi2register[rs1]!=abi2register[rs2]:
abi2register["x1"] = pc
pc += imm
run(pc)
pc = abi2register["x1"]
return None

def b_blt(data):
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
imm = sign_extend(int(data[-31:-25]+data[-12:-7], 2), 12)#alterations required
if abi2register[rs1]<abi2register[rs2]:
abi2register["x1"] = pc
pc += imm
run(pc)
pc = abi2register["x1"]
return None

def b_bge(data):
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
imm = sign_extend(int(data[-31:-25]+data[-12:-7], 2), 12) #alterations required
if abi2register[rs1]>abi2register[rs2]:
abi2register["x1"] = pc
pc += imm
run(pc)
pc = abi2register["x1"]
return None

def b_bltu(data):
def b_bltu(data):#unsigned
return None

def b_bgeu(data):
def b_bgeu(data):#unsigned
return None

def u_aupic(data):
rd = func(data[-12:-7])
imm = sign_extend(int(data[-31:-12], 2), 12)
abi2register[rd] = pc + imm
return None

def u_lui(data):
rd = func(data[-12:-7])
imm = sign_extend(int(data[-31:-12], 2), 12)
abi2register[rd] = imm
return None

def j_jal(data):
rd = func(data[-12:-7])
imm = sign_extend(int(data[-31:-12], 2), 12)
abi2register[rd] = pc
pc+= imm
val = str(pc)
val = val[:-1]
val = val+"0"
pc = int(val)
run(pc)
pc = abi2register[rd]
return None

def Bonus_mul(data):
rs1 = func(data[-20:-15])
rs2 = func(data[-25:-20])
rd = func(data[-12:-7])
num1 = str(abi2register[rs1])
num2 = str(abi2register[rs2])
abi2register[rd] = bin(int(num1,2)*int(num2,2))
return None

pc = 0
def Bonus_rst(data):
for i in abi2register:
if(i==pc):
continue
abi2register[i]=1
return None

def Bonus_rvrs(data):#check
rs1 = func(data[-20:-15])
rd = func(data[-12:-7])
val = abi2register[rs1]
abi2register[rd] = int(str(val)[::-1])
return None

ra = "x1"
pc =0

while pc < len(data):
if data[pc][-7:] == '0110011' and data[pc][-15:-12] == '000' and data[pc][-32:-25] == '0000000':
r_add(data[pc])
Expand Down Expand Up @@ -136,6 +272,9 @@ def j_jal(data):

elif data[pc][-7:] == '0110011' and data[pc][-15:-12] == '111' and data[pc][-32:-25] == '0000000':
r_and(data[pc])

elif data[pc][-7:] == '0110011' and data[pc][-15:-12] == '000' and data[pc][-32:-25] == '0000001':
Bonus_mul(data[pc])

elif data[pc][-7:] == '0000011' and data[pc][-15:-12] == '010':
i_lw(data[pc])
Expand Down Expand Up @@ -178,9 +317,90 @@ def j_jal(data):

elif data[pc][-7:] == '1101111':
j_jal(data[pc])

elif data[pc] == '00000000000000000000000000000000':
Bonus_rst(data[pc])

elif data[pc][-7:] == '0001011':
Bonus_rvrs(data[pc])

else:
print("Illegal instruction")
sys.exit()

pc += 1
pc += 1

def run(pc):
while pc < len(data):
if data[pc][-7:] == '0110011' and data[pc][-15:-12] == '000' and data[pc][-32:-25] == '0000000':
r_add(data[pc])

elif data[pc][-7:] == '0110011' and data[pc][-15:-12] == '000' and data[pc][-32:-25] == '0100000':
r_sub(data[pc])

elif data[pc][-7:] == '0110011' and data[pc][-15:-12] == '001' and data[pc][-32:-25] == '0000000':
r_sll(data[pc])

elif data[pc][-7:] == '0110011' and data[pc][-15:-12] == '010' and data[pc][-32:-25] == '0000000':
r_slt(data[pc])

elif data[pc][-7:] == '0110011' and data[pc][-15:-12] == '011' and data[pc][-32:-25] == '0000000':
r_sltu(data[pc])

elif data[pc][-7:] == '0110011' and data[pc][-15:-12] == '100' and data[pc][-32:-25] == '0000000':
r_xor(data[pc])

elif data[pc][-7:] == '0110011' and data[pc][-15:-12] == '101' and data[pc][-32:-25] == '0000000':
r_srl(data[pc])

elif data[pc][-7:] == '0110011' and data[pc][-15:-12] == '110' and data[pc][-32:-25] == '0000000':
r_or(data[pc])

elif data[pc][-7:] == '0110011' and data[pc][-15:-12] == '111' and data[pc][-32:-25] == '0000000':
r_and(data[pc])

elif data[pc][-7:] == '0000011' and data[pc][-15:-12] == '010':
i_lw(data[pc])

elif data[pc][-7:] == '0010011' and data[pc][-15:-12] == '000':
i_addi(data[pc])

elif data[pc][-7:] == '0000011' and data[pc][-15:-12] == '011':
i_sltiu(data[pc])

elif data[pc][-7:] == '1100111' and data[pc][-15:-12] == '000':
i_jalr(data[pc])

elif data[pc][-7:] == '0100011' and data[pc][-15:-12] == '010':
s_sw(data[pc])

elif data[pc][-7:] == '1100011' and data[pc][-15:-12] == '000':
b_beq(data[pc])

elif data[pc][-7:] == '1100011' and data[pc][-15:-12] == '001':
b_bne(data[pc])

elif data[pc][-7:] == '1100011' and data[pc][-15:-12] == '100':
b_blt(data[pc])

elif data[pc][-7:] == '1100011' and data[pc][-15:-12] == '101':
b_bge(data[pc])

elif data[pc][-7:] == '1100011' and data[pc][-15:-12] == '110':
b_bltu(data[pc])

elif data[pc][-7:] == '1100011' and data[pc][-15:-12] == '111':
b_bgeu(data[pc])

elif data[pc][-7:] == '0110111':
u_lui(data[pc])

elif data[pc][-7:] == '0010111':
u_aupic(data[pc])

elif data[pc][-7:] == '1101111':
j_jal(data[pc])

else:
print("Illegal instruction")
sys.exit()