PROGRESS

Include/cpython/object.h

@@ -230,6 +230,9 @@ struct _typeobject {
     /* bitset of which type-watchers care about this type */
     unsigned char tp_watched;
     uint16_t tp_versions_used;
+
+    /* hooks to specializers */
+    binaryopspecfunc tp_binary_op_specialize;
 };
 
 /* This struct is used by the specializer

Include/internal/pycore_code.h

@@ -99,6 +99,7 @@ typedef struct {
 
 typedef struct {
     _Py_BackoffCounter counter;
+    uint16_t external_cache[4];
 } _PyBinaryOpCache;
 
 #define INLINE_CACHE_ENTRIES_BINARY_OP CACHE_ENTRIES(_PyBinaryOpCache)
@@ -436,6 +437,12 @@ write_obj(uint16_t *p, PyObject *val)
     memcpy(p, &val, sizeof(val));
 }
 
+static inline void
+write_void(uint16_t *p, void *val)
+{
+    memcpy(p, &val, sizeof(val));
+}
+
 static inline uint16_t
 read_u16(uint16_t *p)
 {
@@ -466,6 +473,14 @@ read_obj(uint16_t *p)
     return val;
 }
 
+static inline void *
+read_void(uint16_t *p)
+{
+    void *val;
+    memcpy(&val, p, sizeof(val));
+    return val;
+}
+
 /* See Objects/exception_handling_notes.txt for details.
  */
 static inline unsigned char *

Include/internal/pycore_interp.h

@@ -280,9 +280,17 @@ struct _is {
     /* the initial PyInterpreterState.threads.head */
     _PyThreadStateImpl _initial_thread;
     Py_ssize_t _interactive_src_count;
+
+    PyBinaryOpSpecializationDescr binary_op_spec[256];
 };
 
 
+#define BINOP_FLOAT_INT_MULTIPLY 0
+#define BINOP_FLOAT_INT_SUBTRACT 1
+#define BINOP_INT_FLOAT_MULTIPLY 2
+#define BINOP_INT_FLOAT_SUBTRACT 3
+
+
 /* other API */
 
 extern void _PyInterpreterState_Clear(PyThreadState *tstate);

Include/internal/pycore_magic_number.h

@@ -271,7 +271,7 @@ PC/launcher.c must also be updated.
 
 */
 
-#define PYC_MAGIC_NUMBER 3607
+#define PYC_MAGIC_NUMBER 3609
 /* This is equivalent to converting PYC_MAGIC_NUMBER to 2 bytes
    (little-endian) and then appending b'\r\n'. */
 #define PYC_MAGIC_NUMBER_TOKEN \