py/emit.h

/* Notes on passes:
 * We don't know exactly the opcodes in pass 1 because they depend on the
 * closing over of variables (LOAD_CLOSURE, BUILD_TUPLE, MAKE_CLOSURE), which
 * depends on determining the scope of variables in each function, and this
 * is not known until the end of pass 1.
 * As a consequence, we don't know the maximum stack size until the end of pass 2.
 * This is problematic for some emitters (x64) since they need to know the maximum
 * stack size to compile the entry to the function, and this effects code size.
 */

typedef enum {
    PASS_1 = 1, // work out id's and their kind, and number of labels
    PASS_2 = 2, // work out stack size and code size and label offsets
    PASS_3 = 3, // emit code
} pass_kind_t;

typedef struct _emit_t emit_t;

typedef struct _emit_method_table_t {
    void (*set_native_types)(emit_t *emit, bool do_native_types);
    void (*start_pass)(emit_t *emit, pass_kind_t pass, scope_t *scope);
    void (*end_pass)(emit_t *emit);
    bool (*last_emit_was_return_value)(emit_t *emit);
    int (*get_stack_size)(emit_t *emit);
    void (*set_stack_size)(emit_t *emit, int size);

    int (*label_new)(emit_t *emit);
    void (*label_assign)(emit_t *emit, int l);
    void (*import_name)(emit_t *emit, qstr qstr);
    void (*import_from)(emit_t *emit, qstr qstr);
    void (*import_star)(emit_t *emit);
    void (*load_const_tok)(emit_t *emit, py_token_kind_t tok);
    void (*load_const_small_int)(emit_t *emit, int arg);
    void (*load_const_int)(emit_t *emit, qstr qstr);
    void (*load_const_dec)(emit_t *emit, qstr qstr);
    void (*load_const_id)(emit_t *emit, qstr qstr);
    void (*load_const_str)(emit_t *emit, qstr qstr, bool bytes);
    void (*load_const_verbatim_start)(emit_t *emit);
    void (*load_const_verbatim_int)(emit_t *emit, int val);
    void (*load_const_verbatim_str)(emit_t *emit, const char *str);
    void (*load_const_verbatim_strn)(emit_t *emit, const char *str, int len);
    void (*load_const_verbatim_quoted_str)(emit_t *emit, qstr qstr, bool bytes);
    void (*load_const_verbatim_end)(emit_t *emit);
    void (*load_fast)(emit_t *emit, qstr qstr, int local_num);
    void (*load_name)(emit_t *emit, qstr qstr);
    void (*load_global)(emit_t *emit, qstr qstr);
    void (*load_deref)(emit_t *emit, qstr qstr);
    void (*load_closure)(emit_t *emit, qstr qstr);
    void (*load_attr)(emit_t *emit, qstr qstr);
    void (*load_method)(emit_t *emit, qstr qstr);
    void (*load_build_class)(emit_t *emit);
    void (*store_fast)(emit_t *emit, qstr qstr, int local_num);
    void (*store_name)(emit_t *emit, qstr qstr);
    void (*store_global)(emit_t *emit, qstr qstr);
    void (*store_deref)(emit_t *emit, qstr qstr);
    void (*store_attr)(emit_t *emit, qstr qstr);
    void (*store_locals)(emit_t *emit);
    void (*store_subscr)(emit_t *emit);
    void (*delete_fast)(emit_t *emit, qstr qstr, int local_num);
    void (*delete_name)(emit_t *emit, qstr qstr);
    void (*delete_global)(emit_t *emit, qstr qstr);
    void (*delete_deref)(emit_t *emit, qstr qstr);
    void (*delete_attr)(emit_t *emit, qstr qstr);
    void (*delete_subscr)(emit_t *emit);
    void (*dup_top)(emit_t *emit);
    void (*dup_top_two)(emit_t *emit);
    void (*pop_top)(emit_t *emit);
    void (*rot_two)(emit_t *emit);
    void (*rot_three)(emit_t *emit);
    void (*jump)(emit_t *emit, int label);
    void (*pop_jump_if_true)(emit_t *emit, int label);
    void (*pop_jump_if_false)(emit_t *emit, int label);
    void (*jump_if_true_or_pop)(emit_t *emit, int label);
    void (*jump_if_false_or_pop)(emit_t *emit, int label);
    void (*setup_loop)(emit_t *emit, int label);
    void (*break_loop)(emit_t *emit, int label);
    void (*continue_loop)(emit_t *emit, int label);
    void (*setup_with)(emit_t *emit, int label);
    void (*with_cleanup)(emit_t *emit);
    void (*setup_except)(emit_t *emit, int label);
    void (*setup_finally)(emit_t *emit, int label);
    void (*end_finally)(emit_t *emit);
    void (*get_iter)(emit_t *emit); // tos = getiter(tos)
    void (*for_iter)(emit_t *emit, int label);
    void (*for_iter_end)(emit_t *emit);
    void (*pop_block)(emit_t *emit);
    void (*pop_except)(emit_t *emit);
    void (*unary_op)(emit_t *emit, rt_unary_op_t op);
    void (*binary_op)(emit_t *emit, rt_binary_op_t op);
    void (*compare_op)(emit_t *emit, rt_compare_op_t op);
    void (*build_tuple)(emit_t *emit, int n_args);
    void (*build_list)(emit_t *emit, int n_args);
    void (*list_append)(emit_t *emit, int list_stack_index);
    void (*build_map)(emit_t *emit, int n_args);
    void (*store_map)(emit_t *emit);
    void (*map_add)(emit_t *emit, int map_stack_index);
    void (*build_set)(emit_t *emit, int n_args);
    void (*set_add)(emit_t *emit, int set_stack_index);
    void (*build_slice)(emit_t *emit, int n_args);
    void (*unpack_sequence)(emit_t *emit, int n_args);
    void (*unpack_ex)(emit_t *emit, int n_left, int n_right);
    void (*make_function)(emit_t *emit, scope_t *scope, int n_dict_params, int n_default_params);
    void (*make_closure)(emit_t *emit, scope_t *scope, int n_dict_params, int n_default_params);
    void (*call_function)(emit_t *emit, int n_positional, int n_keyword, bool have_star_arg, bool have_dbl_star_arg);
    void (*call_method)(emit_t *emit, int n_positional, int n_keyword, bool have_star_arg, bool have_dbl_star_arg);
    void (*return_value)(emit_t *emit);
    void (*raise_varargs)(emit_t *emit, int n_args);
    void (*yield_value)(emit_t *emit);
    void (*yield_from)(emit_t *emit);
} emit_method_table_t;

void emit_common_load_id(pass_kind_t pass, scope_t *scope, emit_t *emit, const emit_method_table_t *emit_method_table, qstr qstr___class__, qstr qstr);
void emit_common_store_id(pass_kind_t pass, scope_t *scope, emit_t *emit, const emit_method_table_t *emit_method_table, qstr qstr);
void emit_common_delete_id(pass_kind_t pass, scope_t *scope, emit_t *emit, const emit_method_table_t *emit_method_table, qstr qstr);

void emit_new_cpython(emit_t **emit, const emit_method_table_t **emit_method_table);
void emit_new_bc(emit_t **emit, const emit_method_table_t **emit_method_table);
void emit_new_x64(emit_t **emit, const emit_method_table_t **emit_method_table);
void emit_new_thumb(emit_t **emit, const emit_method_table_t **emit_method_table);

/*
void emit_set_native_types(emitter_t *emit, bool do_native_types);
void emit_start_pass(emitter_t *emit, pass_kind_t pass, scope_t *scope);
void emit_end_pass(emitter_t *emit);
bool emit_last_emit_was_return_value(emitter_t *emit);
int emit_get_stack_size(emitter_t *emit);
void emit_set_stack_size(emitter_t *emit, int size);

int emit_label_new(emitter_t *emit);
void emit_label_assign(emitter_t *emit, int l);
void emit_import_name(emitter_t *emit, qstr qstr);
void emit_import_from(emitter_t *emit, qstr qstr);
void emit_import_star(emitter_t *emit);
void emit_load_const_tok(emitter_t *emit, py_token_kind_t tok);
void emit_load_const_small_int(emitter_t *emit, int arg);
void emit_load_const_int(emitter_t *emit, qstr qstr);
void emit_load_const_dec(emitter_t *emit, qstr qstr);
void emit_load_const_id(emitter_t *emit, qstr qstr);
void emit_load_const_str(emitter_t *emit, qstr qstr, bool bytes);
void emit_load_const_verbatim_start(emitter_t *emit);
void emit_load_const_verbatim_int(emitter_t *emit, int val);
void emit_load_const_verbatim_str(emitter_t *emit, const char *str);
void emit_load_const_verbatim_strn(emitter_t *emit, const char *str, int len);
void emit_load_const_verbatim_quoted_str(emitter_t *emit, qstr qstr, bool bytes);
void emit_load_const_verbatim_end(emitter_t *emit);
void emit_load_fast(emitter_t *emit, qstr qstr, int local_num);
void emit_load_name(emitter_t *emit, qstr qstr);
void emit_load_global(emitter_t *emit, qstr qstr);
void emit_load_deref(emitter_t *emit, qstr qstr);
void emit_load_closure(emitter_t *emit, qstr qstr);
void emit_load_attr(emitter_t *emit, qstr qstr);
void emit_load_method(emitter_t *emit, qstr qstr);
void emit_load_build_class(emitter_t *emit);
void emit_store_fast(emitter_t *emit, qstr qstr, int local_num);
void emit_store_name(emitter_t *emit, qstr qstr);
void emit_store_global(emitter_t *emit, qstr qstr);
void emit_store_deref(emitter_t *emit, qstr qstr);
void emit_store_attr(emitter_t *emit, qstr qstr);
void emit_store_locals(emitter_t *emit);
void emit_store_subscr(emitter_t *emit);
void emit_delete_fast(emitter_t *emit, qstr qstr, int local_num);
void emit_delete_name(emitter_t *emit, qstr qstr);
void emit_delete_global(emitter_t *emit, qstr qstr);
void emit_delete_deref(emitter_t *emit, qstr qstr);
void emit_delete_attr(emitter_t *emit, qstr qstr);
void emit_delete_subscr(emitter_t *emit);
void emit_dup_top(emitter_t *emit);
void emit_dup_top_two(emitter_t *emit);
void emit_pop_top(emitter_t *emit);
void emit_rot_two(emitter_t *emit);
void emit_rot_three(emitter_t *emit);
void emit_jump(emitter_t *emit, int label);
void emit_pop_jump_if_true(emitter_t *emit, int label);
void emit_pop_jump_if_false(emitter_t *emit, int label);
void emit_jump_if_true_or_pop(emitter_t *emit, int label);
void emit_jump_if_false_or_pop(emitter_t *emit, int label);
void emit_setup_loop(emitter_t *emit, int label);
void emit_break_loop(emitter_t *emit, int label);
void emit_continue_loop(emitter_t *emit, int label);
void emit_setup_with(emitter_t *emit, int label);
void emit_with_cleanup(emitter_t *emit);
void emit_setup_except(emitter_t *emit, int label);
void emit_setup_finally(emitter_t *emit, int label);
void emit_end_finally(emitter_t *emit);
void emit_get_iter(emitter_t *emit); // tos = getiter(tos)
void emit_for_iter(emitter_t *emit, int label);
void emit_for_iter_end(emitter_t *emit);
void emit_pop_block(emitter_t *emit);
void emit_pop_except(emitter_t *emit);
void emit_unary_op(emitter_t *emit, rt_unary_op_t op);
void emit_binary_op(emitter_t *emit, rt_binary_op_t op);
void emit_compare_op(emitter_t *emit, rt_compare_op_t op);
void emit_build_tuple(emitter_t *emit, int n_args);
void emit_build_list(emitter_t *emit, int n_args);
void emit_list_append(emitter_t *emit, int list_stack_index);
void emit_build_map(emitter_t *emit, int n_args);
void emit_store_map(emitter_t *emit);
void emit_map_add(emitter_t *emit, int map_stack_index);
void emit_build_set(emitter_t *emit, int n_args);
void emit_set_add(emitter_t *emit, int set_stack_index);
void emit_build_slice(emitter_t *emit, int n_args);
void emit_unpack_sequence(emitter_t *emit, int n_args);
void emit_unpack_ex(emitter_t *emit, int n_left, int n_right);
void emit_make_function(emitter_t *emit, scope_t *scope, int n_dict_params, int n_default_params);
void emit_make_closure(emitter_t *emit, scope_t *scope, int n_dict_params, int n_default_params);
void emit_call_function(emitter_t *emit, int n_positional, int n_keyword, bool have_star_arg, bool have_dbl_star_arg);
void emit_call_method(emitter_t *emit, int n_positional, int n_keyword, bool have_star_arg, bool have_dbl_star_arg);
void emit_return_value(emitter_t *emit);
void emit_raise_varargs(emitter_t *emit, int n_args);
void emit_yield_value(emitter_t *emit);
void emit_yield_from(emitter_t *emit);
*/