fix result type of function pointers

tests/test_jit/test_binops.py

 from util import fncptr_from_c_script
+import ctypes
 
 def test_add():
-    fn, _ = fncptr_from_c_script("test_add.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_add.c", "test_fnc", restype=ctypes.c_uint8)
     assert fn() == 9
 
 def test_sub():
-    fn, _ = fncptr_from_c_script("test_sub.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_sub.c", "test_fnc", restype=ctypes.c_uint8)
     assert fn() == 11
 
 def test_mul():
-    fn, _ = fncptr_from_c_script("test_mul.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_mul.c", "test_fnc", restype=ctypes.c_uint8)
     assert fn() == 0xf6
 
 def test_sdiv():
-    fn, _ = fncptr_from_c_script("test_sdiv.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_sdiv.c", "test_fnc", restype=ctypes.c_uint8)
     assert fn() == 0xf4
 
 def test_urem():
-    fn, _ = fncptr_from_c_script("test_urem.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_urem.c", "test_fnc", restype=ctypes.c_uint8)
     assert fn() == 5
 
 def test_shl():
-    fn, _ = fncptr_from_c_script("test_shl.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_shl.c", "test_fnc", restype=ctypes.c_uint64)
     assert fn() == 0x7e707560c92d5400
 
 def test_lshr():
-    fn, _ = fncptr_from_c_script("test_lshr.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_lshr.c", "test_fnc", restype=ctypes.c_uint64)
     assert fn() == 0x2367e707560c92
 
 def test_and():
-    fn, _ = fncptr_from_c_script("test_and.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_and.c", "test_fnc", restype=ctypes.c_uint64)
     assert fn() == 0x8588901c10004b14
 
 def test_xor():
-    fn, _ = fncptr_from_c_script("test_xor.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_xor.c", "test_fnc", restype=ctypes.c_uint64)
     assert fn() == 0x58376ec3e83fa0e1

tests/test_jit/test_cmpops.py

 from util import fncptr_from_c_script
+import ctypes
 
 def test_eq_int():
     fn, _ = fncptr_from_c_script("test_eq_int.c", "test_fnc")
@@ -17,21 +18,21 @@ def test_ne_ref():
     assert fn() == 1
 
 def test_sge():
-    fn, _ = fncptr_from_c_script("test_sge.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_sge.c", "test_fnc", restype=ctypes.c_uint8)
     assert fn() == 1
 
 def test_sgt():
-    fn, _ = fncptr_from_c_script("test_sgt.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_sgt.c", "test_fnc", restype=ctypes.c_uint8)
     assert fn() == 0
 
 def test_sle():
-    fn, _ = fncptr_from_c_script("test_sle.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_sle.c", "test_fnc", restype=ctypes.c_uint8)
     assert fn() == 1
 
 def test_slt():
-    fn, _ = fncptr_from_c_script("test_slt.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_slt.c", "test_fnc", restype=ctypes.c_uint8)
     assert fn() == 0
 
 def test_ult():
-    fn, _ = fncptr_from_c_script("test_ult.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_ult.c", "test_fnc", restype=ctypes.c_uint8)
     assert fn() == 0

tests/test_jit/test_convops.py

 from util import fncptr_from_c_script
-
+import ctypes
 
 def test_trunc():
-    fn, _ = fncptr_from_c_script("test_trunc.c", "test_fnc")
+    fn, _ = fncptr_from_c_script("test_trunc.c", "test_fnc", restype=ctypes.c_uint32)
     assert fn() == 0x58324b55