added jump shortcut mnemonics to MU8A

mu808asm.py

@@ -17,13 +17,33 @@ import sys, re, struct
 mnemos = ['nop', 'jmp', 'iat', 'out', 'inp', 'set', 'cpy', 'fma',
          'sub', 'div', 'mdf', 'abs', 'sqr', 'nel', 'tri', 'rnd']
 
+# mu808 jump shortcuts
+jmp_shorts = {
+    'jeq': 'jmp 0',    # direct jump if equals to zero
+    'jgt': 'jmp 1',    # direct jump if greater than zero
+    'jlt': 'jmp 2',    # direct jump if less than zero
+    'jge': 'jmp 3',    # direct jump if greater than or equals to zero
+    'jle': 'jmp 4',    # direct jump if less than or equals to zero
+    'jne': 'jmp 5',    # direct jump if not equals to zero
+    'juc': 'jmp 6 0',  # direct unconditional jump
+    'ieq': 'jmp 7',    # indirect jump if equals to zero
+    'igt': 'jmp 8',    # indirect jump if greater than zero
+    'ilt': 'jmp 9',    # indirect jump if less than zero
+    'ige': 'jmp 10',   # indirect jump if greater than or equals to zero
+    'ile': 'jmp 11',   # indirect jump if less than or equals to zero
+    'ine': 'jmp 12',   # indirect jump if not equals to zero
+    'iuc': 'jmp 13 0'  # indirect unconditional jump
+}
+
 # converts the MU8A source code to the plaintext machine code representation
 def assemble(source):
     labels = {}
     out = ''
     lno = 0
     vreg = re.compile(r'\s+')
-    for line in source.split('\n'):
+    for shrt, meaning in jmp_shorts.items(): # replace the jump shortcuts
+        source = source.replace(shrt, meaning)
+    for line in source.split('\n'): # parse the main code
         fields = []
         line = line.split(';')[0].strip()
         if len(line) > 0: # actual line to be counted on