add arm_blx_label(_thumb) testcase

suite/regress/arm_blx_label.py

+#!/usr/bin/python
+
+# Test BL <label> instruction for ARM32
+
+# Github issue: #248
+# Author: dmxcsnsbh
+
+from keystone import *
+
+import regress
+
+class TestARM(regress.RegressTest):
+    def runTest(self):
+        # Initialize Keystone engine
+        ks = Ks(KS_ARCH_ARM, KS_MODE_ARM)
+        # Assemble to get back insn encoding & statement count
+        encoding, count = ks.asm(b"""
+                    blx func
+                    sub r0, r0, r0
+                    sub r1, r1, r1
+                func:
+                    """)
+        # Assert the result
+        # self.assertEqual(encoding, [ 0x01, 0x00, 0x00, 0xfa, 0x00, 0x00, 0x40, 0xe0, 0x01, 0x10, 0x41, 0xe0 ])
+        self.assertEqual(encoding[:4], [ 0x01, 0x00, 0x00, 0xfa ])
+
+if __name__ == '__main__':
+    regress.main()

suite/regress/arm_blx_label_thumb.py

+#!/usr/bin/python
+
+# Test BL <label> instruction for ARM32
+
+# Github issue: #248
+# Author: dmxcsnsbh
+
+from keystone import *
+
+import regress
+
+class TestARM(regress.RegressTest):
+    def runTest(self):
+        # Initialize Keystone engine
+        ks = Ks(KS_ARCH_ARM, KS_MODE_THUMB)
+        # Assemble to get back insn encoding & statement count
+        encoding, count = ks.asm(b"""
+                    blx  func
+                    movs r0, #0
+                    movs r1, #1
+                func:
+                    """)
+        # Assert the result
+        # self.assertEqual(encoding, [ 0x00, 0xf0, 0x02, 0xe8, 0x00, 0x20, 0x01, 0x21  ])
+        self.assertEqual(encoding[:4], [ 0x00, 0xf0, 0x02, 0xe8 ])
+
+if __name__ == '__main__':
+    regress.main()