diff --git a/regress/movsd.py b/regress/movsd.py
new file mode 100755
index 00000000..e873b1cd
--- /dev/null
+++ b/regress/movsd.py
@@ -0,0 +1,28 @@
+#!/usr/bin/python
+# By Ryan Hileman, issue #3
+
+from capstone import *
+from unicorn import *
+from unicorn.x86_const import *
+
+code = 'f20f1005aa120000'.decode('hex')
+
+def dis(mem, addr):
+    md = Cs(CS_ARCH_X86, CS_MODE_64)
+    return '\n'.join([
+        '%s %s' % (i.mnemonic, i.op_str)
+        for i in md.disasm(str(mem), addr)
+    ])
+
+def hook_code(uc, addr, size, user_data):
+    mem = uc.mem_read(addr, size)
+    print 'instruction size:', size
+    print 'instruction:', str(mem).encode('hex'), dis(mem, addr)
+    print 'reference:  ', code.encode('hex'), dis(code, addr)
+
+addr = 0x400000
+mu = Uc(UC_ARCH_X86, UC_MODE_64)
+mu.hook_add(UC_HOOK_CODE, hook_code)
+mu.mem_map(addr, 8 * 1024 * 1024)
+mu.mem_write(addr, code)
+mu.emu_start(addr, addr + len(code))