micropython/py/bc.h

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
// Exception stack entry
typedef struct _mp_exc_stack {
const byte *handler;
// bit 0 is saved currently_in_except_block value
mp_obj_t *val_sp;
// Saved exception, valid if currently_in_except_block bit is 1
mp_obj_t prev_exc;
// We might only have 2 interesting cases here: SETUP_EXCEPT & SETUP_FINALLY,
// consider storing it in bit 1 of val_sp. TODO: SETUP_WITH?
byte opcode;
} mp_exc_stack_t;
typedef struct _mp_code_state {
const byte *code_info;
const byte *ip;
mp_obj_t *sp;
// bit 0 is saved currently_in_except_block value
mp_exc_stack_t *exc_sp;
uint n_state;
// Variable-length
mp_obj_t state[0];
// Variable-length, never accessed by name, only as (void*)(state + n_state)
//mp_exc_stack_t exc_state[0];
} mp_code_state;
mp_vm_return_kind_t mp_execute_bytecode(mp_code_state *code_state, volatile mp_obj_t inject_exc);
void mp_setup_code_state(mp_code_state *code_state, mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args);
void mp_bytecode_print(const void *descr, const byte *code, int len);
void mp_bytecode_print2(const byte *code, int len);
// Helper macros to access pointer with least significant bit holding a flag
#define MP_TAGPTR_PTR(x) ((void*)((mp_uint_t)(x) & ~((mp_uint_t)1)))
#define MP_TAGPTR_TAG(x) ((mp_uint_t)(x) & 1)
#define MP_TAGPTR_MAKE(ptr, tag) ((void*)((mp_uint_t)(ptr) | tag))