prepare y86lab

y86lab/toy2.py

@@ -0,0 +1,80 @@
+mem = [''] * 1000
+reg = [0] * 10
+pReg = 0
+iReg = ''
+
+def loadProgram(file):
+    global pReg, iReg, reg, mem
+    fil = open(file, 'r')
+    first = True
+    while True:
+        line = fil.readline()
+        if line == '':
+            break
+        fids = line.split()
+        address = int(fids[0])
+        instruc = fids[1]
+        for fld in fids[2: len(fids)]:
+            instruc = instruc + ' ' + fld
+        mem[address] = instruc
+        if first:
+            pReg = address
+            first = False
+    fil.close()
+
+def cycle():
+    global pReg, iReg, reg, mem
+
+    # 取指令
+    iReg = mem[pReg]
+    pReg = pReg + 1
+
+    # 译码
+    flds = iReg.split()
+    opcode = flds[0].lower()    # 操作码
+    if len(flds) > 1:
+        op1 = int(flds[1])      # 操作数1
+    if len(flds) > 2:
+        op2 = int(flds[2])      # 操作数2
+    
+    # 执行和写结果
+    if opcode == 'mov1':
+        reg[op1] = mem[op2]
+    elif opcode == 'mov2':
+        mem[op1] = reg[op2]
+    elif opcode == 'mov3':
+        reg[op1] = op2
+    elif opcode == 'add':
+        reg[op1] = reg[op1] + reg[op2]
+    elif opcode == 'sub':
+        reg[op1] = reg[op1] - reg[op2]
+    elif opcode == 'mul':
+        reg[op1] = reg[op1] * reg[op2]
+    elif opcode == 'div':
+        reg[op1] = reg[op1] // reg[op2]
+    elif opcode == 'jmp':
+        pReg = op1
+    elif opcode == 'jz':
+        if reg[op1] == 0:
+            pReg = op2
+    elif opcode == 'in':
+        reg[op1] = int(input('input:'))
+    elif opcode == 'out':
+        print('output:', reg[op1])
+    elif opcode == 'halt':
+        return False
+    else:
+        print(f'Unknown opcode {opcode}')
+    
+    return True
+
+def run(file):
+    global pReg, iReg, reg, mem
+    loadProgram(file)
+
+    while True:
+        hasNextInstruc = cycle()
+        if hasNextInstruc == False:
+            break
+
+run('D:/python/test.toy2')