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micropython/py/runtime.c

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#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "misc.h"
#include "mpyconfig.h"
#include "runtime.h"
#include "bc.h"
#if 0 // print debugging info
#define DEBUG_PRINT (1)
#define WRITE_NATIVE (1)
#define DEBUG_printf(args...) printf(args)
#define DEBUG_OP_printf(args...) printf(args)
#else // don't print debugging info
#define DEBUG_printf(args...) (void)0
#define DEBUG_OP_printf(args...) (void)0
#endif
typedef machine_int_t py_small_int_t;
#define IS_O(o, k) (((((py_small_int_t)(o)) & 1) == 0) && (((py_obj_base_t*)(o))->kind == (k)))
#define IS_SMALL_INT(o) (((py_small_int_t)(o)) & 1)
#define FROM_SMALL_INT(o) (((py_small_int_t)(o)) >> 1)
#define TO_SMALL_INT(o) ((py_obj_t)(((o) << 1) | 1))
#if MICROPY_ENABLE_FLOAT
typedef machine_float_t float_t;
#endif
typedef enum {
O_CONST,
O_STR,
#if MICROPY_ENABLE_FLOAT
O_FLOAT,
#endif
O_FUN_0,
O_FUN_1,
O_FUN_2,
O_FUN_N,
O_FUN_BC,
O_FUN_ASM,
O_BOUND_METH,
O_LIST,
O_SET,
O_MAP,
O_CLASS,
O_OBJ,
} py_obj_kind_t;
typedef enum {
MAP_QSTR,
MAP_PY_OBJ,
} py_map_kind_t;
typedef struct _py_map_elem_t {
py_obj_t key;
py_obj_t value;
} py_map_elem_t;
typedef struct _py_map_t {
py_map_kind_t kind; // TODO merge this 1-bit field into alloc or used
machine_uint_t alloc;
machine_uint_t used;
py_map_elem_t *table;
} py_map_t;
typedef struct _py_obj_base_t py_obj_base_t;
struct _py_obj_base_t {
py_obj_kind_t kind;
union {
const char *id;
qstr u_str;
#if MICROPY_ENABLE_FLOAT
float_t u_flt;
#endif
struct { // for O_FUN_[012N]
int n_args;
void *fun;
} u_fun;
struct { // for O_FUN_BC
int n_args;
byte *code;
uint len;
} u_fun_bc;
struct { // for O_FUN_ASM
int n_args;
void *fun;
} u_fun_asm;
struct { // for O_BOUND_METH
py_obj_t meth;
py_obj_t self;
} u_bound_meth;
struct { // for O_LIST
int alloc;
int len;
py_obj_t *items;
} u_list;
struct { // for O_SET
int alloc;
int used;
py_obj_t *table;
} u_set;
py_map_t u_map; // for O_MAP
struct { // for O_CLASS
py_map_t *locals;
} u_class;
struct { // for O_OBJ
py_obj_base_t *class; // points to a O_CLASS object
py_map_t *members;
} u_obj;
};
};
py_obj_t py_const_none;
py_obj_t py_const_false;
py_obj_t py_const_true;
// locals and globals need to be pointers because they can be the same in outer module scope
py_map_t *map_locals;
py_map_t *map_globals;
py_map_t map_builtins;
// approximatelly doubling primes; made with Mathematica command: Table[Prime[Floor[(1.7)^n]], {n, 3, 24}]
static int doubling_primes[] = {7, 19, 43, 89, 179, 347, 647, 1229, 2297, 4243, 7829, 14347, 26017, 47149, 84947, 152443, 273253, 488399, 869927, 1547173, 2745121, 4861607};
int get_doubling_prime_greater_or_equal_to(int x) {
for (int i = 0; i < sizeof(doubling_primes) / sizeof(int); i++) {
if (doubling_primes[i] >= x) {
return doubling_primes[i];
}
}
// ran out of primes in the table!
// return something sensible, at least make it odd
return x | 1;
}
void py_map_init(py_map_t *map, py_map_kind_t kind, int n) {
map->kind = kind;
map->alloc = get_doubling_prime_greater_or_equal_to(n + 1);
map->used = 0;
map->table = m_new(py_map_elem_t, map->alloc);
for (int i = 0; i < map->alloc; i++) {
map->table[i].key = NULL;
map->table[i].value = NULL;
}
}
py_map_t *py_map_new(py_map_kind_t kind, int n) {
py_map_t *map = m_new(py_map_t, 1);
py_map_init(map, kind, n);
return map;
}
int py_obj_hash(py_obj_t o_in) {
if (IS_SMALL_INT(o_in)) {
return FROM_SMALL_INT(o_in);
} else if (IS_O(o_in, O_STR)) {
return ((py_obj_base_t*)o_in)->u_str;
} else {
assert(0);
return 0;
}
}
bool py_obj_equal(py_obj_t o1, py_obj_t o2) {
if (o1 == o2) {
return true;
} else if (IS_SMALL_INT(o1) && IS_SMALL_INT(o2)) {
return false;
} else if (IS_O(o1, O_STR) && IS_O(o2, O_STR)) {
return ((py_obj_base_t*)o1)->u_str == ((py_obj_base_t*)o2)->u_str;
} else {
assert(0);
return false;
}
}
py_map_elem_t* py_map_lookup_helper(py_map_t *map, py_obj_t index, bool add_if_not_found) {
bool is_map_py_obj = (map->kind == MAP_PY_OBJ);
machine_uint_t hash;
if (is_map_py_obj) {
hash = py_obj_hash(index);
} else {
hash = (machine_uint_t)index;
}
uint pos = hash % map->alloc;
for (;;) {
py_map_elem_t *elem = &map->table[pos];
if (elem->key == NULL) {
// not in table
if (add_if_not_found) {
if (map->used + 1 >= map->alloc) {
// not enough room in table, rehash it
int old_alloc = map->alloc;
py_map_elem_t *old_table = map->table;
map->alloc = get_doubling_prime_greater_or_equal_to(map->alloc + 1);
map->used = 0;
map->table = m_new(py_map_elem_t, map->alloc);
for (int i = 0; i < old_alloc; i++) {
if (old_table[i].key != NULL) {
py_map_lookup_helper(map, old_table[i].key, true)->value = old_table[i].value;
}
}
m_free(old_table);
// restart the search for the new element
pos = hash % map->alloc;
} else {
map->used += 1;
elem->key = index;
return elem;
}
} else {
return NULL;
}
} else if (elem->key == index || (is_map_py_obj && py_obj_equal(elem->key, index))) {
// found it
if (add_if_not_found) {
elem->key = index;
}
return elem;
} else {
// not yet found, keep searching in this table
pos = (pos + 1) % map->alloc;
}
}
}
py_map_elem_t* py_qstr_map_lookup(py_map_t *map, qstr index, bool add_if_not_found) {
py_obj_t o = (py_obj_t)(machine_uint_t)index;
return py_map_lookup_helper(map, o, add_if_not_found);
}
py_map_elem_t* py_map_lookup(py_obj_t o, py_obj_t index, bool add_if_not_found) {
assert(IS_O(o, O_MAP));
return py_map_lookup_helper(&((py_obj_base_t *)o)->u_map, index, add_if_not_found);
}
static bool fit_small_int(py_small_int_t o) {
return true;
}
py_obj_t py_obj_new_const(const char *id) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_CONST;
o->id = id;
return (py_obj_t)o;
}
py_obj_t py_obj_new_str(qstr qstr) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_STR;
o->u_str = qstr;
return (py_obj_t)o;
}
#if MICROPY_ENABLE_FLOAT
py_obj_t py_obj_new_float(float_t val) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_FLOAT;
o->u_flt = val;
return (py_obj_t)o;
}
#endif
py_obj_t list_append(py_obj_t self_in, py_obj_t arg) {
assert(IS_O(self_in, O_LIST));
py_obj_base_t *self = self_in;
if (self->u_list.len >= self->u_list.alloc) {
self->u_list.alloc *= 2;
self->u_list.items = m_renew(py_obj_t, self->u_list.items, self->u_list.alloc);
}
self->u_list.items[self->u_list.len++] = arg;
return arg;
}
static qstr q_append;
static qstr q_print;
static qstr q_len;
static qstr q___build_class__;
typedef enum {
PY_CODE_NONE,
PY_CODE_BYTE,
PY_CODE_NATIVE,
PY_CODE_INLINE_ASM,
} py_code_kind_t;
typedef struct _py_code_t {
py_code_kind_t kind;
int n_args;
union {
struct {
byte *code;
uint len;
} u_byte;
struct {
py_fun_t fun;
} u_native;
struct {
void *fun;
} u_inline_asm;
};
} py_code_t;
static int next_unique_code_id;
static py_code_t *unique_codes;
py_obj_t fun_list_append;
py_obj_t py_builtin_print(py_obj_t o) {
if (IS_O(o, O_STR)) {
// special case, print string raw
printf("%s\n", qstr_str(((py_obj_base_t*)o)->u_str));
} else {
// print the object Python style
py_obj_print(o);
printf("\n");
}
return py_const_none;
}
py_obj_t py_builtin_len(py_obj_t o_in) {
py_small_int_t len = 0;
if (IS_O(o_in, O_LIST)) {
py_obj_base_t *o = o_in;
len = o->u_list.len;
} else if (IS_O(o_in, O_MAP)) {
py_obj_base_t *o = o_in;
len = o->u_map.used;
} else {
assert(0);
}
return TO_SMALL_INT(len);
}
py_obj_t py_builtin___build_class__(py_obj_t o_class_fun, py_obj_t o_class_name) {
// we differ from CPython: we set the new __locals__ object here
py_map_t *old_locals = map_locals;
py_map_t *class_locals = py_map_new(MAP_QSTR, 0);
map_locals = class_locals;
// call the class code
rt_call_function_1(o_class_fun, (py_obj_t)0xdeadbeef);
// restore old __locals__ object
map_locals = old_locals;
// create and return the new class
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_CLASS;
o->u_class.locals = class_locals;
return o;
}
#ifdef WRITE_NATIVE
FILE *fp_native = NULL;
#endif
void rt_init() {
q_append = qstr_from_str_static("append");
q_print = qstr_from_str_static("print");
q_len = qstr_from_str_static("len");
q___build_class__ = qstr_from_str_static("__build_class__");
py_const_none = py_obj_new_const("None");
py_const_false = py_obj_new_const("False");
py_const_true = py_obj_new_const("True");
// locals = globals for outer module (see Objects/frameobject.c/PyFrame_New())
map_locals = map_globals = py_map_new(MAP_QSTR, 1);
py_qstr_map_lookup(map_globals, qstr_from_str_static("__name__"), true)->value = py_obj_new_str(qstr_from_str_static("__main__"));
py_map_init(&map_builtins, MAP_QSTR, 3);
py_qstr_map_lookup(&map_builtins, q_print, true)->value = rt_make_function_1(py_builtin_print);
py_qstr_map_lookup(&map_builtins, q_len, true)->value = rt_make_function_1(py_builtin_len);
py_qstr_map_lookup(&map_builtins, q___build_class__, true)->value = rt_make_function_2(py_builtin___build_class__);
next_unique_code_id = 1;
unique_codes = NULL;
fun_list_append = rt_make_function_2(list_append);
#ifdef WRITE_NATIVE
fp_native = fopen("out-native", "wb");
#endif
}
void rt_deinit() {
#ifdef WRITE_NATIVE
if (fp_native != NULL) {
fclose(fp_native);
}
#endif
}
int rt_get_new_unique_code_id() {
return next_unique_code_id++;
}
static void alloc_unique_codes() {
if (unique_codes == NULL) {
unique_codes = m_new(py_code_t, next_unique_code_id);
for (int i = 0; i < next_unique_code_id; i++) {
unique_codes[i].kind = PY_CODE_NONE;
}
}
}
void rt_assign_byte_code(int unique_code_id, byte *code, uint len, int n_args) {
alloc_unique_codes();
assert(unique_code_id < next_unique_code_id);
unique_codes[unique_code_id].kind = PY_CODE_BYTE;
unique_codes[unique_code_id].n_args = n_args;
unique_codes[unique_code_id].u_byte.code = code;
unique_codes[unique_code_id].u_byte.len = len;
DEBUG_printf("assign byte code: id=%d code=%p len=%u n_args=%d\n", unique_code_id, code, len, n_args);
}
void rt_assign_native_code(int unique_code_id, py_fun_t fun, uint len, int n_args) {
alloc_unique_codes();
assert(1 <= unique_code_id && unique_code_id < next_unique_code_id);
unique_codes[unique_code_id].kind = PY_CODE_NATIVE;
unique_codes[unique_code_id].n_args = n_args;
unique_codes[unique_code_id].u_native.fun = fun;
#ifdef DEBUG_PRINT
DEBUG_printf("assign native code: id=%d fun=%p len=%u n_args=%d\n", unique_code_id, fun, len, n_args);
byte *fun_data = (byte*)(((machine_uint_t)fun) & (~1)); // need to clear lower bit in case it's thumb code
for (int i = 0; i < 128 && i < len; i++) {
if (i > 0 && i % 16 == 0) {
DEBUG_printf("\n");
}
DEBUG_printf(" %02x", fun_data[i]);
}
DEBUG_printf("\n");
#ifdef WRITE_NATIVE
if (fp_native != NULL) {
fwrite(fun_data, len, 1, fp_native);
fflush(fp_native);
}
#endif
#endif
}
void rt_assign_inline_asm_code(int unique_code_id, py_fun_t fun, uint len, int n_args) {
alloc_unique_codes();
assert(1 <= unique_code_id && unique_code_id < next_unique_code_id);
unique_codes[unique_code_id].kind = PY_CODE_INLINE_ASM;
unique_codes[unique_code_id].n_args = n_args;
unique_codes[unique_code_id].u_inline_asm.fun = fun;
#ifdef DEBUG_PRINT
DEBUG_printf("assign inline asm code: id=%d fun=%p len=%u n_args=%d\n", unique_code_id, fun, len, n_args);
byte *fun_data = (byte*)(((machine_uint_t)fun) & (~1)); // need to clear lower bit in case it's thumb code
for (int i = 0; i < 128 && i < len; i++) {
if (i > 0 && i % 16 == 0) {
DEBUG_printf("\n");
}
DEBUG_printf(" %02x", fun_data[i]);
}
DEBUG_printf("\n");
#ifdef WRITE_NATIVE
if (fp_native != NULL) {
fwrite(fun_data, len, 1, fp_native);
}
#endif
#endif
}
bool py_obj_is_callable(py_obj_t o_in) {
if (IS_SMALL_INT(o_in)) {
return false;
} else {
py_obj_base_t *o = o_in;
switch (o->kind) {
case O_FUN_0:
case O_FUN_1:
case O_FUN_2:
case O_FUN_N:
case O_FUN_BC:
case O_FUN_ASM:
// what about O_CLASS, and an O_OBJ that has a __call__ method?
return true;
default:
return false;
}
}
}
const char *py_obj_get_type_str(py_obj_t o_in) {
if (IS_SMALL_INT(o_in)) {
return "int";
} else {
py_obj_base_t *o = o_in;
switch (o->kind) {
case O_CONST:
if (o == py_const_none) {
return "NoneType";
} else {
return "bool";
}
case O_STR:
return "str";
#if MICROPY_ENABLE_FLOAT
case O_FLOAT:
return "float";
#endif
case O_FUN_0:
case O_FUN_1:
case O_FUN_2:
case O_FUN_N:
case O_FUN_BC:
return "function";
case O_LIST:
return "list";
case O_SET:
return "set";
case O_MAP:
return "dict";
case O_OBJ:
{
py_map_elem_t *qn = py_qstr_map_lookup(o->u_obj.class->u_class.locals, qstr_from_str_static("__qualname__"), false);
assert(qn != NULL);
assert(IS_O(qn->value, O_STR));
return qstr_str(((py_obj_base_t*)qn->value)->u_str);
}
default:
assert(0);
return "UnknownType";
}
}
}
void py_obj_print(py_obj_t o_in) {
if (IS_SMALL_INT(o_in)) {
printf("%d", (int)FROM_SMALL_INT(o_in));
} else {
py_obj_base_t *o = o_in;
switch (o->kind) {
case O_CONST:
printf("%s", o->id);
break;
case O_STR:
// TODO need to escape chars etc
printf("'%s'", qstr_str(o->u_str));
break;
#if MICROPY_ENABLE_FLOAT
case O_FLOAT:
printf("%f", o->u_flt);
break;
#endif
case O_LIST:
printf("[");
for (int i = 0; i < o->u_list.len; i++) {
if (i > 0) {
printf(", ");
}
py_obj_print(o->u_list.items[i]);
}
printf("]");
break;
case O_SET:
{
bool first = true;
printf("{");
for (int i = 0; i < o->u_set.alloc; i++) {
if (o->u_set.table[i] != NULL) {
if (!first) {
printf(", ");
}
first = false;
py_obj_print(o->u_set.table[i]);
}
}
printf("}");
break;
}
case O_MAP:
{
bool first = true;
printf("{");
for (int i = 0; i < o->u_map.alloc; i++) {
if (o->u_map.table[i].key != NULL) {
if (!first) {
printf(", ");
}
first = false;
py_obj_print(o->u_map.table[i].key);
printf(": ");
py_obj_print(o->u_map.table[i].value);
}
}
printf("}");
break;
}
default:
printf("<? %d>", o->kind);
assert(0);
}
}
}
int rt_is_true(py_obj_t arg) {
DEBUG_OP_printf("is true %p\n", arg);
if (IS_SMALL_INT(arg)) {
if (FROM_SMALL_INT(arg) == 0) {
return 0;
} else {
return 1;
}
} else if (arg == py_const_none) {
return 0;
} else if (arg == py_const_false) {
return 0;
} else if (arg == py_const_true) {
return 1;
} else {
assert(0);
return 0;
}
}
int rt_get_int(py_obj_t arg) {
if (IS_SMALL_INT(arg)) {
return FROM_SMALL_INT(arg);
} else {
assert(0);
return 0;
}
}
py_obj_t rt_load_const_str(qstr qstr) {
DEBUG_OP_printf("load '%s'\n", qstr_str(qstr));
return py_obj_new_str(qstr);
}
py_obj_t rt_load_name(qstr qstr) {
// logic: search locals, globals, builtins
DEBUG_OP_printf("load name %s\n", qstr_str(qstr));
py_map_elem_t *elem = py_qstr_map_lookup(map_locals, qstr, false);
if (elem == NULL) {
elem = py_qstr_map_lookup(map_globals, qstr, false);
if (elem == NULL) {
elem = py_qstr_map_lookup(&map_builtins, qstr, false);
if (elem == NULL) {
printf("name doesn't exist: %s\n", qstr_str(qstr));
assert(0);
}
}
}
return elem->value;
}
py_obj_t rt_load_global(qstr qstr) {
// logic: search globals, builtins
DEBUG_OP_printf("load global %s\n", qstr_str(qstr));
py_map_elem_t *elem = py_qstr_map_lookup(map_globals, qstr, false);
if (elem == NULL) {
elem = py_qstr_map_lookup(&map_builtins, qstr, false);
if (elem == NULL) {
printf("name doesn't exist: %s\n", qstr_str(qstr));
assert(0);
}
}
return elem->value;
}
py_obj_t rt_load_build_class() {
DEBUG_OP_printf("load_build_class\n");
py_map_elem_t *elem = py_qstr_map_lookup(&map_builtins, q___build_class__, false);
if (elem == NULL) {
printf("name doesn't exist: __build_class__\n");
assert(0);
}
return elem->value;
}
void rt_store_name(qstr qstr, py_obj_t obj) {
DEBUG_OP_printf("store name %s <- %p\n", qstr_str(qstr), obj);
py_qstr_map_lookup(map_locals, qstr, true)->value = obj;
}
void rt_store_global(qstr qstr, py_obj_t obj) {
DEBUG_OP_printf("store global %s <- %p\n", qstr_str(qstr), obj);
py_qstr_map_lookup(map_globals, qstr, true)->value = obj;
}
py_obj_t rt_unary_op(int op, py_obj_t arg) {
assert(0);
return py_const_none;
}
py_obj_t rt_binary_op(int op, py_obj_t lhs, py_obj_t rhs) {
DEBUG_OP_printf("binary %d %p %p\n", op, lhs, rhs);
if (op == RT_BINARY_OP_SUBSCR) {
if (IS_O(lhs, O_LIST) && IS_SMALL_INT(rhs)) {
return ((py_obj_base_t*)lhs)->u_list.items[FROM_SMALL_INT(rhs)];
} else {
assert(0);
}
} else if (IS_SMALL_INT(lhs) && IS_SMALL_INT(rhs)) {
py_small_int_t val;
switch (op) {
case RT_BINARY_OP_ADD:
case RT_BINARY_OP_INPLACE_ADD: val = FROM_SMALL_INT(lhs) + FROM_SMALL_INT(rhs); break;
case RT_BINARY_OP_SUBTRACT: val = FROM_SMALL_INT(lhs) - FROM_SMALL_INT(rhs); break;
case RT_BINARY_OP_MULTIPLY: val = FROM_SMALL_INT(lhs) * FROM_SMALL_INT(rhs); break;
case RT_BINARY_OP_FLOOR_DIVIDE: val = FROM_SMALL_INT(lhs) / FROM_SMALL_INT(rhs); break;
#if MICROPY_ENABLE_FLOAT
case RT_BINARY_OP_TRUE_DIVIDE: return py_obj_new_float((float_t)FROM_SMALL_INT(lhs) / (float_t)FROM_SMALL_INT(rhs));
#endif
default: printf("%d\n", op); assert(0); val = 0;
}
if (fit_small_int(val)) {
return TO_SMALL_INT(val);
}
} else if (IS_O(lhs, O_STR) && IS_O(rhs, O_STR)) {
const char *lhs_str = qstr_str(((py_obj_base_t*)lhs)->u_str);
const char *rhs_str = qstr_str(((py_obj_base_t*)rhs)->u_str);
char *val;
switch (op) {
case RT_BINARY_OP_ADD:
case RT_BINARY_OP_INPLACE_ADD: val = m_new(char, strlen(lhs_str) + strlen(rhs_str) + 1); strcpy(val, lhs_str); strcat(val, rhs_str); break;
default: printf("%d\n", op); assert(0); val = NULL;
}
return py_obj_new_str(qstr_from_str_take(val));
}
assert(0);
return py_const_none;
}
py_obj_t rt_compare_op(int op, py_obj_t lhs, py_obj_t rhs) {
DEBUG_OP_printf("compare %d %p %p\n", op, lhs, rhs);
if (IS_SMALL_INT(lhs) && IS_SMALL_INT(rhs)) {
int cmp;
switch (op) {
case RT_COMPARE_OP_LESS: cmp = FROM_SMALL_INT(lhs) < FROM_SMALL_INT(rhs); break;
case RT_COMPARE_OP_MORE: cmp = FROM_SMALL_INT(lhs) > FROM_SMALL_INT(rhs); break;
default: assert(0); cmp = 0;
}
if (cmp) {
return py_const_true;
} else {
return py_const_false;
}
}
assert(0);
return py_const_none;
}
py_obj_t rt_make_function_from_id(int unique_code_id) {
DEBUG_OP_printf("make_function_from_id %d\n", unique_code_id);
if (unique_code_id < 1 || unique_code_id >= next_unique_code_id) {
// illegal code id
return py_const_none;
}
py_code_t *c = &unique_codes[unique_code_id];
py_obj_base_t *o = m_new(py_obj_base_t, 1);
switch (c->kind) {
case PY_CODE_BYTE:
o->kind = O_FUN_BC;
o->u_fun_bc.n_args = c->n_args;
o->u_fun_bc.code = c->u_byte.code;
o->u_fun_bc.len = c->u_byte.len;
break;
case PY_CODE_NATIVE:
switch (c->n_args) {
case 0: o->kind = O_FUN_0; break;
case 1: o->kind = O_FUN_1; break;
case 2: o->kind = O_FUN_2; break;
default: assert(0);
}
o->u_fun.fun = c->u_native.fun;
break;
case PY_CODE_INLINE_ASM:
o->kind = O_FUN_ASM;
o->u_fun_asm.n_args = c->n_args;
o->u_fun_asm.fun = c->u_inline_asm.fun;
break;
default:
assert(0);
}
return o;
}
py_obj_t rt_make_function_0(py_fun_0_t fun) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_FUN_0;
o->u_fun.fun = fun;
return o;
}
py_obj_t rt_make_function_1(py_fun_1_t fun) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_FUN_1;
o->u_fun.fun = fun;
return o;
}
py_obj_t rt_make_function_2(py_fun_2_t fun) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_FUN_2;
o->u_fun.fun = fun;
return o;
}
py_obj_t rt_make_function(int n_args, py_fun_t code) {
// assumes code is a pointer to a py_fun_t (i think this is safe...)
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_FUN_N;
o->u_fun.n_args = n_args;
o->u_fun.fun = code;
return o;
}
py_obj_t rt_call_function_0(py_obj_t fun) {
return rt_call_function_n(fun, 0, NULL);
}
py_obj_t rt_call_function_1(py_obj_t fun, py_obj_t arg) {
return rt_call_function_n(fun, 1, &arg);
}
py_obj_t rt_call_function_2(py_obj_t fun, py_obj_t arg1, py_obj_t arg2) {
py_obj_t args[2];
args[1] = arg1;
args[0] = arg2;
return rt_call_function_n(fun, 2, args);
}
typedef machine_uint_t (*inline_asm_fun_0_t)();
typedef machine_uint_t (*inline_asm_fun_1_t)(machine_uint_t);
typedef machine_uint_t (*inline_asm_fun_2_t)(machine_uint_t, machine_uint_t);
typedef machine_uint_t (*inline_asm_fun_3_t)(machine_uint_t, machine_uint_t, machine_uint_t);
// convert a Python object to a sensible value for inline asm
machine_uint_t rt_convert_obj_for_inline_asm(py_obj_t obj) {
// TODO for byte_array, pass pointer to the array
if (IS_SMALL_INT(obj)) {
return FROM_SMALL_INT(obj);
} else if (obj == py_const_none) {
return 0;
} else if (obj == py_const_false) {
return 0;
} else if (obj == py_const_true) {
return 1;
} else {
py_obj_base_t *o = obj;
switch (o->kind) {
case O_STR:
// pointer to the string (it's probably constant though!)
return (machine_uint_t)qstr_str(o->u_str);
#if MICROPY_ENABLE_FLOAT
case O_FLOAT:
// convert float to int (could also pass in float registers)
return (machine_int_t)o->u_flt;
#endif
case O_LIST:
// pointer to start of list (could pass length, but then could use len(x) for that)
return (machine_uint_t)o->u_list.items;
default:
// just pass along a pointer to the object
return (machine_uint_t)obj;
}
}
}
// convert a return value from inline asm to a sensible Python object
py_obj_t rt_convert_val_from_inline_asm(machine_uint_t val) {
return TO_SMALL_INT(val);
}
// args are in reverse order in the array
py_obj_t rt_call_function_n(py_obj_t fun, int n_args, const py_obj_t *args) {
int n_args_fun = 0;
if (IS_O(fun, O_FUN_0)) {
py_obj_base_t *o = fun;
if (n_args != 0) {
n_args_fun = 0;
goto bad_n_args;
}
DEBUG_OP_printf("calling native %p()\n", o->u_fun.fun);
return ((py_fun_0_t)o->u_fun.fun)();
} else if (IS_O(fun, O_FUN_1)) {
py_obj_base_t *o = fun;
if (n_args != 1) {
n_args_fun = 1;
goto bad_n_args;
}
DEBUG_OP_printf("calling native %p(%p)\n", o->u_fun.fun, args[0]);
return ((py_fun_1_t)o->u_fun.fun)(args[0]);
} else if (IS_O(fun, O_FUN_2)) {
py_obj_base_t *o = fun;
if (n_args != 2) {
n_args_fun = 2;
goto bad_n_args;
}
DEBUG_OP_printf("calling native %p(%p, %p)\n", o->u_fun.fun, args[1], args[0]);
return ((py_fun_2_t)o->u_fun.fun)(args[1], args[0]);
// TODO O_FUN_N
} else if (IS_O(fun, O_FUN_BC)) {
py_obj_base_t *o = fun;
if (n_args != o->u_fun_bc.n_args) {
n_args_fun = o->u_fun_bc.n_args;
goto bad_n_args;
}
DEBUG_OP_printf("calling byte code %p(n_args=%d)\n", o->u_fun_bc.code, n_args);
return py_execute_byte_code(o->u_fun_bc.code, o->u_fun_bc.len, args, n_args);
} else if (IS_O(fun, O_FUN_ASM)) {
py_obj_base_t *o = fun;
if (n_args != o->u_fun_asm.n_args) {
n_args_fun = o->u_fun_asm.n_args;
goto bad_n_args;
}
DEBUG_OP_printf("calling inline asm %p(n_args=%d)\n", o->u_fun_asm.fun, n_args);
machine_uint_t ret;
if (n_args == 0) {
ret = ((inline_asm_fun_0_t)o->u_fun_asm.fun)();
} else if (n_args == 1) {
ret = ((inline_asm_fun_1_t)o->u_fun_asm.fun)(rt_convert_obj_for_inline_asm(args[0]));
} else if (n_args == 2) {
ret = ((inline_asm_fun_2_t)o->u_fun_asm.fun)(rt_convert_obj_for_inline_asm(args[1]), rt_convert_obj_for_inline_asm(args[0]));
} else if (n_args == 3) {
ret = ((inline_asm_fun_3_t)o->u_fun_asm.fun)(rt_convert_obj_for_inline_asm(args[2]), rt_convert_obj_for_inline_asm(args[1]), rt_convert_obj_for_inline_asm(args[0]));
} else {
assert(0);
ret = 0;
}
return rt_convert_val_from_inline_asm(ret);
} else if (IS_O(fun, O_BOUND_METH)) {
py_obj_base_t *o = fun;
DEBUG_OP_printf("calling bound method %p(self=%p, n_args=%d)\n", o->u_bound_meth.meth, o->u_bound_meth.self, n_args);
if (n_args == 0) {
return rt_call_function_n(o->u_bound_meth.meth, 1, &o->u_bound_meth.self);
} else if (n_args == 1) {
py_obj_t args2[2];
args2[1] = o->u_bound_meth.self;
args2[0] = args[0];
return rt_call_function_n(o->u_bound_meth.meth, 2, args2);
} else {
// TODO not implemented
assert(0);
return py_const_none;
//return rt_call_function_2(o->u_bound_meth.meth, n_args + 1, o->u_bound_meth.self + args);
}
} else if (IS_O(fun, O_CLASS)) {
// instantiate an instance of a class
if (n_args != 0) {
n_args_fun = 0;
goto bad_n_args;
}
DEBUG_OP_printf("instantiate object of class %p with no args\n", fun);
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_OBJ;
o->u_obj.class = fun;
o->u_obj.members = py_map_new(MAP_QSTR, 0);
return o;
} else {
printf("fun %p %d\n", fun, ((py_obj_base_t*)fun)->kind);
assert(0);
return py_const_none;
}
bad_n_args:
printf("TypeError: function takes %d positional arguments but %d were given\n", n_args_fun, n_args);
assert(0);
return py_const_none;
}
// args contains: arg(n_args-1) arg(n_args-2) ... arg(0) self/NULL fun
// if n_args==0 then there are only self/NULL and fun
py_obj_t rt_call_method_n(int n_args, const py_obj_t *args) {
DEBUG_OP_printf("call method %p(self=%p, n_args=%d)\n", args[n_args + 1], args[n_args], n_args);
return rt_call_function_n(args[n_args + 1], n_args + ((args[n_args] == NULL) ? 0 : 1), args);
}
// items are in reverse order
py_obj_t rt_build_list(int n_args, py_obj_t *items) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_LIST;
o->u_list.alloc = n_args;
if (o->u_list.alloc < 4) {
o->u_list.alloc = 4;
}
o->u_list.len = n_args;
o->u_list.items = m_new(py_obj_t, o->u_list.alloc);
for (int i = 0; i < n_args; i++) {
o->u_list.items[i] = items[n_args - i - 1];
}
return o;
}
py_obj_t py_set_lookup(py_obj_t o_in, py_obj_t index, bool add_if_not_found) {
assert(IS_O(o_in, O_SET));
py_obj_base_t *o = o_in;
int hash = py_obj_hash(index);
int pos = hash % o->u_set.alloc;
for (;;) {
py_obj_t elem = o->u_set.table[pos];
if (elem == NULL) {
// not in table
if (add_if_not_found) {
if (o->u_set.used + 1 >= o->u_set.alloc) {
// not enough room in table, rehash it
int old_alloc = o->u_set.alloc;
py_obj_t *old_table = o->u_set.table;
o->u_set.alloc = get_doubling_prime_greater_or_equal_to(o->u_set.alloc + 1);
o->u_set.used = 0;
o->u_set.table = m_new(py_obj_t, o->u_set.alloc);
for (int i = 0; i < old_alloc; i++) {
if (old_table[i] != NULL) {
py_set_lookup(o, old_table[i], true);
}
}
m_free(old_table);
// restart the search for the new element
pos = hash % o->u_set.alloc;
} else {
o->u_set.used += 1;
o->u_set.table[pos] = index;
return index;
}
} else {
return NULL;
}
} else if (py_obj_equal(elem, index)) {
// found it
return elem;
} else {
// not yet found, keep searching in this table
pos = (pos + 1) % o->u_set.alloc;
}
}
}
py_obj_t rt_build_set(int n_args, py_obj_t *items) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_SET;
o->u_set.alloc = get_doubling_prime_greater_or_equal_to(n_args + 1);
o->u_set.used = 0;
o->u_set.table = m_new(py_obj_t, o->u_set.alloc);
for (int i = 0; i < o->u_set.alloc; i++) {
o->u_set.table[i] = NULL;
}
for (int i = 0; i < n_args; i++) {
py_set_lookup(o, items[i], true);
}
return o;
}
py_obj_t rt_build_map(int n_args) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_MAP;
py_map_init(&o->u_map, MAP_PY_OBJ, n_args);
return o;
}
py_obj_t rt_store_map(py_obj_t map, py_obj_t key, py_obj_t value) {
assert(IS_O(map, O_MAP)); // should always be
py_map_lookup(map, key, true)->value = value;
return map;
}
py_obj_t build_bound_method(py_obj_t self, py_obj_t meth) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_BOUND_METH;
o->u_bound_meth.meth = meth;
o->u_bound_meth.self = self;
return o;
}
py_obj_t rt_load_attr(py_obj_t base, qstr attr) {
DEBUG_OP_printf("load attr %s\n", qstr_str(attr));
if (IS_O(base, O_LIST) && attr == q_append) {
return build_bound_method(base, fun_list_append);
} else if (IS_O(base, O_CLASS)) {
py_obj_base_t *o = base;
py_map_elem_t *elem = py_qstr_map_lookup(o->u_class.locals, attr, false);
if (elem == NULL) {
goto no_attr;
}
return elem->value;
} else if (IS_O(base, O_OBJ)) {
// logic: look in obj members then class locals (TODO check this against CPython)
py_obj_base_t *o = base;
py_map_elem_t *elem = py_qstr_map_lookup(o->u_obj.members, attr, false);
if (elem != NULL) {
// object member, always treated as a value
return elem->value;
}
elem = py_qstr_map_lookup(o->u_obj.class->u_class.locals, attr, false);
if (elem != NULL) {
if (py_obj_is_callable(elem->value)) {
// class member is callable so build a bound method
return build_bound_method(base, elem->value);
} else {
// class member is a value, so just return that value
return elem->value;
}
}
goto no_attr;
}
no_attr:
printf("AttributeError: '%s' object has no attribute '%s'\n", py_obj_get_type_str(base), qstr_str(attr));
assert(0);
return py_const_none;
}
void rt_load_method(py_obj_t base, qstr attr, py_obj_t *dest) {
DEBUG_OP_printf("load method %s\n", qstr_str(attr));
if (IS_O(base, O_LIST) && attr == q_append) {
dest[1] = fun_list_append;
dest[0] = base;
return;
} else if (IS_O(base, O_OBJ)) {
// logic: look in obj members then class locals (TODO check this against CPython)
py_obj_base_t *o = base;
py_map_elem_t *elem = py_qstr_map_lookup(o->u_obj.members, attr, false);
if (elem != NULL) {
// object member, always treated as a value
dest[1] = elem->value;
dest[0] = NULL;
return;
}
elem = py_qstr_map_lookup(o->u_obj.class->u_class.locals, attr, false);
if (elem != NULL) {
if (py_obj_is_callable(elem->value)) {
// class member is callable so build a bound method
dest[1] = elem->value;
dest[0] = base;
return;
} else {
// class member is a value, so just return that value
dest[1] = elem->value;
dest[0] = NULL;
return;
}
}
goto no_attr;
}
no_attr:
dest[1] = rt_load_attr(base, attr);
dest[0] = NULL;
}
void rt_store_attr(py_obj_t base, qstr attr, py_obj_t val) {
DEBUG_OP_printf("store attr %p.%s <- %p\n", base, qstr_str(attr), val);
if (IS_O(base, O_OBJ)) {
// logic: look in class locals (no add) then obj members (add) (TODO check this against CPython)
py_obj_base_t *o = base;
py_map_elem_t *elem = py_qstr_map_lookup(o->u_obj.class->u_class.locals, attr, false);
if (elem != NULL) {
elem->value = val;
} else {
elem = py_qstr_map_lookup(o->u_obj.class->u_class.locals, attr, true)->value = val;
}
} else {
printf("?AttributeError: '%s' object has no attribute '%s'\n", py_obj_get_type_str(base), qstr_str(attr));
assert(0);
}
}
void rt_store_subscr(py_obj_t base, py_obj_t index, py_obj_t value) {
if (IS_O(base, O_LIST) && IS_SMALL_INT(index)) {
// list store
py_obj_base_t *o = base;
int idx = FROM_SMALL_INT(index);
if (idx < 0) {
idx += o->u_list.len;
}
if (0 <= idx && idx < o->u_list.len) {
o->u_list.items[idx] = value;
} else {
assert(0);
}
} else if (IS_O(base, O_MAP)) {
// map store
py_map_lookup(base, index, true)->value = value;
} else {
assert(0);
}
}
void *rt_fun_table[RT_F_NUMBER_OF] = {
rt_load_const_str,
rt_load_name,
rt_load_global,
rt_load_build_class,
rt_load_attr,
rt_load_method,
rt_store_name,
rt_store_attr,
rt_store_subscr,
rt_is_true,
rt_unary_op,
rt_build_list,
rt_build_map,
rt_store_map,
rt_build_set,
rt_make_function_from_id,
rt_call_function_n,
rt_call_method_n,
rt_binary_op,
rt_compare_op,
};
/*
void rt_f_vector(rt_fun_kind_t fun_kind) {
(rt_f_table[fun_kind])();
}
*/
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