[pypy-svn] r74789 - pypy/branch/x86-64-jit-backend/pypy/jit/backend/x86

[jcreigh at codespeak.net]

Author: jcreigh
Date: Wed May 26 19:34:27 2010
New Revision: 74789

Modified:
   pypy/branch/x86-64-jit-backend/pypy/jit/backend/x86/regloc.py
Log:
define lowest8bits on ImmedLoc to behave the same as ri386 IMM32

Modified: pypy/branch/x86-64-jit-backend/pypy/jit/backend/x86/regloc.py
==============================================================================
--- pypy/branch/x86-64-jit-backend/pypy/jit/backend/x86/regloc.py	(original)
+++ pypy/branch/x86-64-jit-backend/pypy/jit/backend/x86/regloc.py	Wed May 26 19:34:27 2010
@@ -82,10 +82,10 @@
         return "ImmedLoc(%d)" % (self.value)
 
     def lowest8bits(self):
-        # XXX: Maybe we could just truncate? But I'm not sure when that
-        # would be the correct behavior.
-        assert rx86.single_byte(self.value)
-        return self
+        val = self.value & 0xFF
+        if val > 0x7F:
+            val -= 0x100
+        return ImmedLoc(val)
 
 class AddressLoc(AssemblerLocation):
     _immutable_ = True