py: Allow configurable object representation, with 2 different options.

1 files changed, 19 insertions, 0 deletions

diff --git a/py/mpconfig.h b/py/mpconfig.h
index d561f80790..27ec5dd3ef 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -49,6 +49,25 @@
 // values below.
 
 /*****************************************************************************/
+/* Object representation                                                     */
+
+// A Micro Python object is a machine word having the following form:
+//  - xxxx...xxx1 : a small int, bits 1 and above are the value
+//  - xxxx...xx10 : a qstr, bits 2 and above are the value
+//  - xxxx...xx00 : a pointer to an mp_obj_base_t (unless a fake object)
+#define MICROPY_OBJ_REPR_A (0)
+
+// A Micro Python object is a machine word having the following form:
+//  - xxxx...xx01 : a small int, bits 2 and above are the value
+//  - xxxx...xx11 : a qstr, bits 2 and above are the value
+//  - xxxx...xxx0 : a pointer to an mp_obj_base_t (unless a fake object)
+#define MICROPY_OBJ_REPR_B (1)
+
+#ifndef MICROPY_OBJ_REPR
+#define MICROPY_OBJ_REPR (MICROPY_OBJ_REPR_A)
+#endif
+
+/*****************************************************************************/
 /* Memory allocation policy                                                  */
 
 // Number of words allocated (in BSS) to the GC stack (minimum is 1)