--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/python/ppci/target/x86/x86.py	Sat Mar 01 15:40:31 2014 +0100
@@ -0,0 +1,69 @@
+import ppci
+import ir
+
+class X86CodeGenSimple:
+   """ 
+    Inefficient code generation, assume stack machine 
+    backend
+   """
+   def __init__(self, diag):
+      self.diag = diag
+
+   def emit(self, i):
+      self.asm.append(i)
+
+   def genBin(self, ir):
+      self.asm = []
+      self.genModule(ir)
+      return self.asm
+
+   def genModule(self, ir):
+      for f in ir.Functions:
+         self.genFunction(f)
+   def genFunction(self, f):
+      self.emit('global {0}'.format(f.name))
+      self.emit('{0}:'.format(f.name))
+      self.emit('jmp {0}'.format(f.entry.name))
+      for bb in f.BasicBlocks:
+         self.genBB(bb)
+   def genBB(self, bb):
+      self.emit('{0}:'.format(bb.name))
+      for i in bb.Instructions:
+         self.genIns(i)
+   def genIns(self, i):
+      if type(i) is ir.BinaryOperator:
+         ops = {'+':'add', '-':'sub', '*':'mul'}
+         if i.operation in ops:
+            i.result.reg = 'rax'
+            i.value1.reg = 'rbx'
+            i.value2.reg = 'rbx'
+            self.emit('mov {0}, {1}'.format(i.result.reg, i.value1.reg))
+            self.emit('{0} {1}, {2}'.format(ops[i.operation], i.result.reg, i.value2.reg))
+         else:
+            raise NotImplementedError('op {0}'.format(i.operation))
+      elif type(i) is ir.Load:
+         self.emit('mov {0}, [{1}]'.format(i.value, i.location))
+      elif type(i) is ir.Return:
+         self.emit('ret')
+      elif type(i) is ir.Call:
+         self.emit('call')
+      elif type(i) is ir.ImmLoad:
+         self.emit('mov {0}, {1}'.format(i.target, i.value))
+      elif type(i) is ir.Store:
+         self.emit('mov [{0}], {1}'.format(i.location, i.value))
+      elif type(i) is ir.ConditionalBranch:
+         self.emit('cmp {0}, {1}'.format(i.a, i.b))
+         jmps = {'>':'jg', '<':'jl', '==':'je'}
+         if i.cond in jmps:
+            j = jmps[i.cond]
+            self.emit('{0} {1}'.format(j, i.lab1.name))
+         else:
+            raise NotImplementedError('condition {0}'.format(i.cond))
+         self.emit('jmp {0}'.format(i.lab2.name))
+      elif type(i) is ir.Branch:
+         self.emit('jmp {0}'.format(i.target.name))
+      elif type(i) is ir.Alloc:
+         pass
+      else:
+         raise NotImplementedError('{0}'.format(i))
+