sencagri · April 30, 2018 13:16 · Apr 30, 2018
diff --git a/gistfile1.txt b/gistfile1.txt
@@ -0,0 +1,109 @@
+import re
+
+# program counter 
+pc = 100
+
+# jump list
+colonList = list()
+
+# param list
+param = list()
+
+# result list
+output = list()
+
+# instruction set for ARM V8 processor
+instructionSet = [["ADDI", "00001110001mmmmm100001nnnnnddddd", 3], ["SUB","00101110001mmmmm100001nnnnnddddd", 3]]
+# delimiter characters used for splitting line 
+delimiter = ", | "
+
+def incrementPC():
+    global pc
+    pc = pc + 4
+
+def getInputFile(isAsm2Bin):
+    if isAsm2Bin:
+        program = "sample_program.txt"
+    else:
+        program = "sample_program2.txt"
+
+    file = open(program, "r")
+    lines = file.readlines()
+    file.close()
+
+    if len(lines) == 0:
+        print("No input data!")
+        exit()
+    return lines
+
+def decodeParameters(stringPart):
+    for par in stringPart[1:]:
+        # register value
+        if str.startswith(par, "R") or str.startswith(par, "#"):
+            paramDigit = par[1:];
+        if len(paramDigit) > 0:
+            param.append("{0:05b}".format(int(paramDigit)))
+
+def processLine_asm2bin(line):
+    endPos = len(line)
+    if endPos > 0:
+        # check if comment added
+        commentIndex = str.find(line, ";")
+        if commentIndex > -1:
+            endPos = commentIndex
+
+        # copy only to the semicolon pos
+        stringPart = line[:endPos]
+
+        if len(stringPart) > 0:
+            # check if line is jump point, if so add colonName to list then exit 
+            colonIndex = str.find(stringPart, ":")
+
+            if colonIndex > 0:
+                colonName  = stringPart[:colonIndex]
+                colonList.append([colonName, pc])
+                return
+
+            # split by delimiter character
+            stringPart = re.split(delimiter, stringPart)
+            stringPart = list(filter(None, stringPart))
+
+            # search first string in instruction list 
+            candidateInst = stringPart[0]
+            candidateRes = [item for item in instructionSet if item[0] == candidateInst]
+
+            # we found the instruction
+            if len(candidateRes) > 0:
+                insBinary = candidateRes[0][1];
+                paramSize = candidateRes[0][2];
+                if paramSize == 3:
+                    decodeParameters(stringPart)
+
+                    insBinary = str.replace(insBinary, "mmmmm", param[0])
+                    insBinary = str.replace(insBinary, "nnnnn", param[1])
+                    insBinary = str.replace(insBinary, "ddddd", param[2])
+                    param.clear()
+
+                output.append(insBinary)
+
+
+
+def dec_asm2bin(inData):
+    for line in inData:
+        processLine_asm2bin(line)
+
+def main():
+    isAsm2Bin = True
+
+    inData = getInputFile(isAsm2Bin)
+
+    # clean empty lines 
+    inData = list(filter(None, inData))
+
+    if isAsm2Bin:
+        dec_asm2bin(inData)
+    else:
+        dec_bin2asm(inData)
+
+if __name__ == "__main__":
+    main()
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