Introduce read_uint16(p) as equivalent to *p

Author: gvanrossum

Include/internal/pycore_code.h

@@ -293,6 +293,12 @@ write_obj(uint16_t *p, PyObject *val)
     memcpy(p, &val, sizeof(val));
 }
 
+static inline uint16_t
+read_u16(uint16_t *p)
+{
+    return *p;
+}
+
 static inline uint32_t
 read_u32(uint16_t *p)
 {

Python/generated_cases.c.h

@@ -156,11 +156,7 @@ def write_body(self, out: Formatter, dedent: int, cache_adjust: int = 0) -> None
                     func = "read_obj"
                 else:
                     type = f"uint{bits}_t "
-                    if ceffect.size == 1:
-                        # There is no read_u16() helper function.
-                        func = f"*"
-                    else:
-                        func = f"read_u{bits}"
+                    func = f"read_u{bits}"
                 out.emit(f"{type}{ceffect.name} = {func}(next_instr + {cache_offset});")
             cache_offset += ceffect.size
         assert cache_offset == self.cache_offset + cache_adjust