prepare y86lab

y86lab/toy.py

@@ -0,0 +1,77 @@
+mem = [0]*1000
+reg = [0]*10
+iReg = 0
+pReg = 0
+
+def loadProgram(file):
+    global mem, reg, iReg, pReg
+    fil = open(file,'r')
+    first = True
+    lineno = 0
+    while True:
+        line = fil.readline()
+        lineno += 1
+        if line == '':
+            break
+        fids = line.split()
+        try:
+            address = int(fids[0])
+            instruc = int(fids[1])
+            if first:
+                pReg = address
+                first = False
+            mem[address] = instruc
+        except:
+            print(f'File {file} line {lineno} has error')
+            pass
+    fil.close
+
+def cycle():
+    global mem, reg, iReg, pReg
+
+    iReg = mem[pReg]
+    pReg = pReg + 1
+
+    opcode = (iReg//10000)
+    r = (iReg//1000) % 10
+    addr = (iReg) % 1000
+
+    if opcode == 0:
+        return False
+    elif opcode == 1:       # mov1 Rx Ay
+        reg[r] = mem[addr]
+    elif opcode == 2:       # mov2 Ay Rx
+        mem[addr] = reg[r]
+    elif opcode == 3:       # mov3 Rx n
+        reg[r] = addr
+    elif opcode == 4:       # mov4 Rx (Ry)
+        reg[r] = mem[reg[addr]]
+    elif opcode == 5:       # add Rx Ry
+        reg[r] = reg[r] + reg[addr]
+    elif opcode == 6:       # sub Rx Ry
+        reg[r] = reg[r] - reg[addr]
+    elif opcode == 7:       # mul Rx Ry
+        reg[r] = reg[r] * reg[addr]
+    elif opcode == 8:       # div Rx Ry
+        reg[r] = reg[r] // reg[addr]
+    elif opcode == 10:      # jmp Ax
+        pReg = addr
+    elif opcode == 11:      # jz Rx Ay
+        if reg[r] == 0:
+            pReg = addr
+    else:
+        print(f'Unknow opcode {opcode}')
+    return True
+
+def run(file):
+    global mem, reg, iReg, pReg
+
+    loadProgram(file)
+
+    while True:
+        if not cycle():
+            break
+
+run('D:/python/test.toy')
+
+