Revamp Python regression tests suite (#2022)

* Fix Python regression test suite (partial)

* Fix Python regression test suite

* Add a test for mapping at high addresses

* Add ctl tests

tests/regress/pshufb.py

@@ -1,21 +1,25 @@
 #!/usr/bin/python
 # By Ryan Hileman, issue #91
 
-# Invalid instruction = test failed
+import regress
 
 from unicorn import *
 from unicorn.x86_const import *
 
-import regress
 
 class Pshufb(regress.RegressTest):
 
     def runTest(self):
         uc = Uc(UC_ARCH_X86, UC_MODE_64)
+        uc.ctl_set_cpu_model(UC_CPU_X86_HASWELL)
+
         uc.mem_map(0x2000, 0x1000)
-        # pshufb xmm0, xmm1
-        uc.mem_write(0x2000, '660f3800c1'.decode('hex'))
+
+        uc.mem_write(0x2000, b'\x66\x0f\x38\x00\xc1')   #  pshufb xmm0, xmm1
+
+        # Invalid instruction -> test failed
         uc.emu_start(0x2000, 0x2005)
 
+
 if __name__ == '__main__':
     regress.main()