emitbc.c 28.7 KB
Newer Older
xbe's avatar
xbe committed
1
#include <stdbool.h>
Damien's avatar
Damien committed
2
3
4
5
6
7
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>

#include "misc.h"
8
#include "mpconfig.h"
9
#include "qstr.h"
Damien's avatar
Damien committed
10
11
12
#include "lexer.h"
#include "parse.h"
#include "scope.h"
13
#include "runtime0.h"
Damien's avatar
Damien committed
14
#include "emit.h"
15
#include "emitglue.h"
16
#include "bc0.h"
Damien's avatar
Damien committed
17

18
19
struct _emit_t {
    pass_kind_t pass;
Damien's avatar
Damien committed
20
21
22
23
24
    int stack_size;
    bool last_emit_was_return_value;

    scope_t *scope;

25
26
27
    uint last_source_line_offset;
    uint last_source_line;

28
    uint max_num_labels;
Damien's avatar
Damien committed
29
30
    uint *label_offsets;

31
32
33
34
35
    uint code_info_offset;
    uint code_info_size;
    uint byte_code_offset;
    uint byte_code_size;
    byte *code_base; // stores both byte code and code info
Damien's avatar
Damien committed
36
37
38
    byte dummy_data[8];
};

39
emit_t *emit_bc_new(uint max_num_labels) {
40
    emit_t *emit = m_new0(emit_t, 1);
41
42
43
44
    emit->max_num_labels = max_num_labels;
    emit->label_offsets = m_new(uint, emit->max_num_labels);
    return emit;
}
45

46
void emit_bc_free(emit_t *emit) {
47
48
49
50
    m_del(uint, emit->label_offsets, emit->max_num_labels);
    m_del_obj(emit_t, emit);
}

51
// all functions must go through this one to emit code info
52
STATIC byte* emit_get_cur_to_write_code_info(emit_t* emit, int num_bytes_to_write) {
53
54
55
56
57
58
59
60
61
62
    //printf("emit %d\n", num_bytes_to_write);
    if (emit->pass < PASS_3) {
        emit->code_info_offset += num_bytes_to_write;
        return emit->dummy_data;
    } else {
        assert(emit->code_info_offset + num_bytes_to_write <= emit->code_info_size);
        byte *c = emit->code_base + emit->code_info_offset;
        emit->code_info_offset += num_bytes_to_write;
        return c;
    }
Damien's avatar
Damien committed
63
64
}

65
STATIC void emit_write_code_info_qstr(emit_t* emit, qstr qstr) {
66
67
68
69
70
71
    byte* c = emit_get_cur_to_write_code_info(emit, 4);
    // TODO variable length encoding for qstr
    c[0] = qstr & 0xff;
    c[1] = (qstr >> 8) & 0xff;
    c[2] = (qstr >> 16) & 0xff;
    c[3] = (qstr >> 24) & 0xff;
Damien's avatar
Damien committed
72
73
}

74
STATIC void emit_write_code_info_bytes_lines(emit_t* emit, uint bytes_to_skip, uint lines_to_skip) {
75
76
77
78
79
80
81
    for (; bytes_to_skip > 31; bytes_to_skip -= 31) {
        *emit_get_cur_to_write_code_info(emit, 1) = 31;
    }
    for (; lines_to_skip > 7; lines_to_skip -= 7) {
        *emit_get_cur_to_write_code_info(emit, 1) = 7 << 5;
    }
    *emit_get_cur_to_write_code_info(emit, 1) = bytes_to_skip | (lines_to_skip << 5);
82
83
84
}

// all functions must go through this one to emit byte code
85
STATIC byte* emit_get_cur_to_write_byte_code(emit_t* emit, int num_bytes_to_write) {
Damien's avatar
Damien committed
86
87
    //printf("emit %d\n", num_bytes_to_write);
    if (emit->pass < PASS_3) {
88
        emit->byte_code_offset += num_bytes_to_write;
Damien's avatar
Damien committed
89
90
        return emit->dummy_data;
    } else {
91
92
93
        assert(emit->byte_code_offset + num_bytes_to_write <= emit->byte_code_size);
        byte *c = emit->code_base + emit->code_info_size + emit->byte_code_offset;
        emit->byte_code_offset += num_bytes_to_write;
Damien's avatar
Damien committed
94
95
96
97
        return c;
    }
}

98
STATIC void emit_write_byte_code_byte(emit_t* emit, byte b1) {
99
    byte* c = emit_get_cur_to_write_byte_code(emit, 1);
Damien's avatar
Damien committed
100
101
102
    c[0] = b1;
}

103
STATIC void emit_write_byte_code_byte_byte(emit_t* emit, byte b1, uint b2) {
Damien's avatar
Damien committed
104
    assert((b2 & (~0xff)) == 0);
105
    byte* c = emit_get_cur_to_write_byte_code(emit, 2);
Damien's avatar
Damien committed
106
107
108
109
    c[0] = b1;
    c[1] = b2;
}

110
STATIC void emit_write_byte_code_uint(emit_t* emit, uint num) {
111
    // We store each 7 bits in a separate byte, and that's how many bytes needed
112
    byte buf[(BYTES_PER_WORD * 8 + 6) / 7];
113
114
115
116
117
118
119
120
121
    byte *p = buf + sizeof(buf);
    // We encode in little-ending order, but store in big-endian, to help decoding
    do {
        *--p = num & 0x7f;
        num >>= 7;
    } while (num != 0);
    byte* c = emit_get_cur_to_write_byte_code(emit, buf + sizeof(buf) - p);
    while (p != buf + sizeof(buf) - 1) {
        *c++ = *p++ | 0x80;
122
    }
123
    *c = *p;
124
125
}

126
// Similar to emit_write_byte_code_uint(), just some extra handling to encode sign
127
STATIC void emit_write_byte_code_byte_int(emit_t* emit, byte b1, machine_int_t num) {
128
129
130
    emit_write_byte_code_byte(emit, b1);

    // We store each 7 bits in a separate byte, and that's how many bytes needed
131
    byte buf[(BYTES_PER_WORD * 8 + 6) / 7];
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
    byte *p = buf + sizeof(buf);
    // We encode in little-ending order, but store in big-endian, to help decoding
    do {
        *--p = num & 0x7f;
        num >>= 7;
    } while (num != 0 && num != -1);
    // Make sure that highest bit we stored (mask 0x40) matches sign
    // of the number. If not, store extra byte just to encode sign
    if (num == -1 && (*p & 0x40) == 0) {
        *--p = 0x7f;
    } else if (num == 0 && (*p & 0x40) != 0) {
        *--p = 0;
    }

    byte* c = emit_get_cur_to_write_byte_code(emit, buf + sizeof(buf) - p);
    while (p != buf + sizeof(buf) - 1) {
        *c++ = *p++ | 0x80;
    }
    *c = *p;
Damien's avatar
Damien committed
151
152
}

153
STATIC void emit_write_byte_code_byte_uint(emit_t* emit, byte b, uint num) {
154
155
    emit_write_byte_code_byte(emit, b);
    emit_write_byte_code_uint(emit, num);
Damien's avatar
Damien committed
156
157
}

158
/* currently unused
159
STATIC void emit_write_byte_code_byte_uint_uint(emit_t* emit, byte b, uint num1, uint num2) {
160
161
162
163
164
165
    emit_write_byte_code_byte(emit, b);
    emit_write_byte_code_byte_uint(emit, num1);
    emit_write_byte_code_byte_uint(emit, num2);
}
*/

166
STATIC void emit_write_byte_code_byte_qstr(emit_t* emit, byte b, qstr qstr) {
167
    emit_write_byte_code_byte_uint(emit, b, qstr);
Damien's avatar
Damien committed
168
169
}

Damien's avatar
Damien committed
170
// unsigned labels are relative to ip following this instruction, stored as 16 bits
171
STATIC void emit_write_byte_code_byte_unsigned_label(emit_t* emit, byte b1, int label) {
172
    uint byte_code_offset;
Damien's avatar
Damien committed
173
    if (emit->pass < PASS_3) {
174
        byte_code_offset = 0;
Damien's avatar
Damien committed
175
    } else {
176
        byte_code_offset = emit->label_offsets[label] - emit->byte_code_offset - 3;
Damien's avatar
Damien committed
177
    }
178
    byte* c = emit_get_cur_to_write_byte_code(emit, 3);
Damien's avatar
Damien committed
179
    c[0] = b1;
180
181
    c[1] = byte_code_offset;
    c[2] = byte_code_offset >> 8;
Damien's avatar
Damien committed
182
183
184
}

// signed labels are relative to ip following this instruction, stored as 16 bits, in excess
185
STATIC void emit_write_byte_code_byte_signed_label(emit_t* emit, byte b1, int label) {
186
    int byte_code_offset;
Damien's avatar
Damien committed
187
    if (emit->pass < PASS_3) {
188
        byte_code_offset = 0;
Damien's avatar
Damien committed
189
    } else {
190
        byte_code_offset = emit->label_offsets[label] - emit->byte_code_offset - 3 + 0x8000;
Damien's avatar
Damien committed
191
    }
192
    byte* c = emit_get_cur_to_write_byte_code(emit, 3);
Damien's avatar
Damien committed
193
    c[0] = b1;
194
195
    c[1] = byte_code_offset;
    c[2] = byte_code_offset >> 8;
Damien's avatar
Damien committed
196
197
}

198
STATIC void emit_bc_set_native_types(emit_t *emit, bool do_native_types) {
Damien George's avatar
Damien George committed
199
200
}

201
STATIC void emit_bc_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scope) {
Damien George's avatar
Damien George committed
202
203
204
205
    emit->pass = pass;
    emit->stack_size = 0;
    emit->last_emit_was_return_value = false;
    emit->scope = scope;
206
207
    emit->last_source_line_offset = 0;
    emit->last_source_line = 1;
Damien George's avatar
Damien George committed
208
209
210
    if (pass == PASS_2) {
        memset(emit->label_offsets, -1, emit->max_num_labels * sizeof(uint));
    }
211
212
213
214
215
216
217
218
219
220
221
222
223
224
    emit->byte_code_offset = 0;
    emit->code_info_offset = 0;

    // write code info size (don't know size at this stage in PASS_2 so need to use maximum space (4 bytes) to write it)
    {
        byte* c = emit_get_cur_to_write_code_info(emit, 4);
        machine_uint_t s = emit->code_info_size;
        c[0] = s & 0xff;
        c[1] = (s >> 8) & 0xff;
        c[2] = (s >> 16) & 0xff;
        c[3] = (s >> 24) & 0xff;
    }

    // code info
225
226
    emit_write_code_info_qstr(emit, scope->source_file);
    emit_write_code_info_qstr(emit, scope->simple_name);
Damien George's avatar
Damien George committed
227

228
    // bytecode prelude: local state size and exception stack size; 16 bit uints for now
229
    {
230
231
232
233
234
235
        byte* c = emit_get_cur_to_write_byte_code(emit, 4);
        uint n_state = scope->num_locals + scope->stack_size;
        c[0] = n_state & 0xff;
        c[1] = (n_state >> 8) & 0xff;
        c[2] = scope->exc_stack_size & 0xff;
        c[3] = (scope->exc_stack_size >> 8) & 0xff;
236
237
238
    }

    // bytecode prelude: initialise closed over variables
Damien George's avatar
Damien George committed
239
240
241
242
243
244
245
246
    int num_cell = 0;
    for (int i = 0; i < scope->id_info_len; i++) {
        id_info_t *id = &scope->id_info[i];
        if (id->kind == ID_INFO_KIND_CELL) {
            num_cell += 1;
        }
    }
    assert(num_cell <= 255);
247
    emit_write_byte_code_byte(emit, num_cell); // write number of locals that are cells
Damien George's avatar
Damien George committed
248
249
250
    for (int i = 0; i < scope->id_info_len; i++) {
        id_info_t *id = &scope->id_info[i];
        if (id->kind == ID_INFO_KIND_CELL) {
251
            emit_write_byte_code_byte(emit, id->local_num); // write the local which should be converted to a cell
Damien George's avatar
Damien George committed
252
253
254
255
        }
    }
}

256
STATIC void emit_bc_end_pass(emit_t *emit) {
Damien George's avatar
Damien George committed
257
258
259
260
261
    // check stack is back to zero size
    if (emit->stack_size != 0) {
        printf("ERROR: stack size not back to zero; got %d\n", emit->stack_size);
    }

262
    emit_write_code_info_bytes_lines(emit, 0, 0); // end of line number info
263

Damien George's avatar
Damien George committed
264
265
    if (emit->pass == PASS_2) {
        // calculate size of code in bytes
266
267
268
        emit->code_info_size = emit->code_info_offset;
        emit->byte_code_size = emit->byte_code_offset;
        emit->code_base = m_new(byte, emit->code_info_size + emit->byte_code_size);
Damien George's avatar
Damien George committed
269
270

    } else if (emit->pass == PASS_3) {
271
272
273
274
        qstr *arg_names = m_new(qstr, emit->scope->num_params);
        for (int i = 0; i < emit->scope->num_params; i++) {
            arg_names[i] = emit->scope->id_info[i].qstr;
        }
275
        mp_emit_glue_assign_byte_code(emit->scope->unique_code_id, emit->code_base,
276
            emit->code_info_size + emit->byte_code_size,
277
            emit->scope->num_params, emit->scope->num_locals,
278
            emit->scope->scope_flags, arg_names);
Damien George's avatar
Damien George committed
279
280
281
    }
}

282
bool emit_bc_last_emit_was_return_value(emit_t *emit) {
Damien's avatar
Damien committed
283
284
285
    return emit->last_emit_was_return_value;
}

286
int emit_bc_get_stack_size(emit_t *emit) {
Damien's avatar
Damien committed
287
288
289
    return emit->stack_size;
}

290
STATIC void emit_bc_set_stack_size(emit_t *emit, int size) {
291
    emit->stack_size = size;
Damien's avatar
Damien committed
292
293
}

294
STATIC void emit_bc_set_source_line(emit_t *emit, int source_line) {
295
    //printf("source: line %d -> %d  offset %d -> %d\n", emit->last_source_line, source_line, emit->last_source_line_offset, emit->byte_code_offset);
296
#if MICROPY_ENABLE_SOURCE_LINE
297
    if (source_line > emit->last_source_line) {
298
299
300
        uint bytes_to_skip = emit->byte_code_offset - emit->last_source_line_offset;
        uint lines_to_skip = source_line - emit->last_source_line;
        emit_write_code_info_bytes_lines(emit, bytes_to_skip, lines_to_skip);
301
        //printf("  %d %d\n", bytes_to_skip, lines_to_skip);
302
303
304
        emit->last_source_line_offset = emit->byte_code_offset;
        emit->last_source_line = source_line;
    }
305
#endif
306
307
}

308
STATIC void emit_bc_load_id(emit_t *emit, qstr qstr) {
309
310
311
    emit_common_load_id(emit, &emit_bc_method_table, emit->scope, qstr);
}

312
STATIC void emit_bc_store_id(emit_t *emit, qstr qstr) {
313
314
315
    emit_common_store_id(emit, &emit_bc_method_table, emit->scope, qstr);
}

316
STATIC void emit_bc_delete_id(emit_t *emit, qstr qstr) {
317
318
319
    emit_common_delete_id(emit, &emit_bc_method_table, emit->scope, qstr);
}

320
// TODO: module-polymorphic function (read: name clash if made global)
321
static void emit_pre(emit_t *emit, int stack_size_delta) {
322
323
324
    emit->stack_size += stack_size_delta;
    if (emit->stack_size > emit->scope->stack_size) {
        emit->scope->stack_size = emit->stack_size;
Damien's avatar
Damien committed
325
326
327
328
    }
    emit->last_emit_was_return_value = false;
}

329
STATIC void emit_bc_label_assign(emit_t *emit, int l) {
Damien's avatar
Damien committed
330
    emit_pre(emit, 0);
331
332
333
334
    assert(l < emit->max_num_labels);
    if (emit->pass == PASS_2) {
        // assign label offset
        assert(emit->label_offsets[l] == -1);
335
        emit->label_offsets[l] = emit->byte_code_offset;
336
337
    } else if (emit->pass == PASS_3) {
        // ensure label offset has not changed from PASS_2 to PASS_3
338
339
        //printf("l%d: (at %d vs %d)\n", l, emit->byte_code_offset, emit->label_offsets[l]);
        assert(emit->label_offsets[l] == emit->byte_code_offset);
Damien's avatar
Damien committed
340
341
342
    }
}

343
STATIC void emit_bc_import_name(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
344
    emit_pre(emit, -1);
345
    emit_write_byte_code_byte_qstr(emit, MP_BC_IMPORT_NAME, qstr);
Damien's avatar
Damien committed
346
347
}

348
STATIC void emit_bc_import_from(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
349
    emit_pre(emit, 1);
350
    emit_write_byte_code_byte_qstr(emit, MP_BC_IMPORT_FROM, qstr);
Damien's avatar
Damien committed
351
352
}

353
STATIC void emit_bc_import_star(emit_t *emit) {
Damien's avatar
Damien committed
354
    emit_pre(emit, -1);
355
    emit_write_byte_code_byte(emit, MP_BC_IMPORT_STAR);
Damien's avatar
Damien committed
356
357
}

358
STATIC void emit_bc_load_const_tok(emit_t *emit, mp_token_kind_t tok) {
Damien's avatar
Damien committed
359
360
    emit_pre(emit, 1);
    switch (tok) {
361
362
363
364
        case MP_TOKEN_KW_FALSE: emit_write_byte_code_byte(emit, MP_BC_LOAD_CONST_FALSE); break;
        case MP_TOKEN_KW_NONE: emit_write_byte_code_byte(emit, MP_BC_LOAD_CONST_NONE); break;
        case MP_TOKEN_KW_TRUE: emit_write_byte_code_byte(emit, MP_BC_LOAD_CONST_TRUE); break;
        case MP_TOKEN_ELLIPSIS: emit_write_byte_code_byte(emit, MP_BC_LOAD_CONST_ELLIPSIS); break;
Damien's avatar
Damien committed
365
366
367
368
        default: assert(0);
    }
}

369
STATIC void emit_bc_load_const_small_int(emit_t *emit, machine_int_t arg) {
Damien's avatar
Damien committed
370
    emit_pre(emit, 1);
371
    emit_write_byte_code_byte_int(emit, MP_BC_LOAD_CONST_SMALL_INT, arg);
Damien's avatar
Damien committed
372
373
}

374
STATIC void emit_bc_load_const_int(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
375
    emit_pre(emit, 1);
376
    emit_write_byte_code_byte_qstr(emit, MP_BC_LOAD_CONST_INT, qstr);
Damien's avatar
Damien committed
377
378
}

379
STATIC void emit_bc_load_const_dec(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
380
    emit_pre(emit, 1);
381
    emit_write_byte_code_byte_qstr(emit, MP_BC_LOAD_CONST_DEC, qstr);
Damien's avatar
Damien committed
382
383
}

384
STATIC void emit_bc_load_const_id(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
385
    emit_pre(emit, 1);
386
    emit_write_byte_code_byte_qstr(emit, MP_BC_LOAD_CONST_ID, qstr);
Damien's avatar
Damien committed
387
388
}

389
STATIC void emit_bc_load_const_str(emit_t *emit, qstr qstr, bool bytes) {
Damien's avatar
Damien committed
390
391
    emit_pre(emit, 1);
    if (bytes) {
392
        emit_write_byte_code_byte_qstr(emit, MP_BC_LOAD_CONST_BYTES, qstr);
Damien's avatar
Damien committed
393
    } else {
394
        emit_write_byte_code_byte_qstr(emit, MP_BC_LOAD_CONST_STRING, qstr);
Damien's avatar
Damien committed
395
396
397
    }
}

398
STATIC void emit_bc_load_const_verbatim_str(emit_t *emit, const char *str) {
399
    // not needed/supported for BC
Damien's avatar
Damien committed
400
401
402
    assert(0);
}

403
STATIC void emit_bc_load_fast(emit_t *emit, qstr qstr, int local_num) {
Damien's avatar
Damien committed
404
405
406
    assert(local_num >= 0);
    emit_pre(emit, 1);
    switch (local_num) {
407
408
409
410
        case 0: emit_write_byte_code_byte(emit, MP_BC_LOAD_FAST_0); break;
        case 1: emit_write_byte_code_byte(emit, MP_BC_LOAD_FAST_1); break;
        case 2: emit_write_byte_code_byte(emit, MP_BC_LOAD_FAST_2); break;
        default: emit_write_byte_code_byte_uint(emit, MP_BC_LOAD_FAST_N, local_num); break;
Damien's avatar
Damien committed
411
412
413
    }
}

414
STATIC void emit_bc_load_deref(emit_t *emit, qstr qstr, int local_num) {
Damien's avatar
Damien committed
415
    emit_pre(emit, 1);
416
    emit_write_byte_code_byte_uint(emit, MP_BC_LOAD_DEREF, local_num);
Damien's avatar
Damien committed
417
418
}

419
STATIC void emit_bc_load_closure(emit_t *emit, qstr qstr, int local_num) {
Damien George's avatar
Damien George committed
420
421
    // not needed/supported for BC
    assert(0);
Damien's avatar
Damien committed
422
423
}

424
STATIC void emit_bc_load_name(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
425
    emit_pre(emit, 1);
426
    emit_write_byte_code_byte_qstr(emit, MP_BC_LOAD_NAME, qstr);
Damien's avatar
Damien committed
427
428
}

429
STATIC void emit_bc_load_global(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
430
    emit_pre(emit, 1);
431
    emit_write_byte_code_byte_qstr(emit, MP_BC_LOAD_GLOBAL, qstr);
Damien's avatar
Damien committed
432
433
}

434
STATIC void emit_bc_load_attr(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
435
    emit_pre(emit, 0);
436
    emit_write_byte_code_byte_qstr(emit, MP_BC_LOAD_ATTR, qstr);
Damien's avatar
Damien committed
437
438
}

439
STATIC void emit_bc_load_method(emit_t *emit, qstr qstr) {
440
    emit_pre(emit, 1);
441
    emit_write_byte_code_byte_qstr(emit, MP_BC_LOAD_METHOD, qstr);
Damien's avatar
Damien committed
442
443
}

444
STATIC void emit_bc_load_build_class(emit_t *emit) {
Damien's avatar
Damien committed
445
    emit_pre(emit, 1);
446
    emit_write_byte_code_byte(emit, MP_BC_LOAD_BUILD_CLASS);
Damien's avatar
Damien committed
447
448
}

449
STATIC void emit_bc_store_fast(emit_t *emit, qstr qstr, int local_num) {
Damien's avatar
Damien committed
450
451
452
    assert(local_num >= 0);
    emit_pre(emit, -1);
    switch (local_num) {
453
454
455
456
        case 0: emit_write_byte_code_byte(emit, MP_BC_STORE_FAST_0); break;
        case 1: emit_write_byte_code_byte(emit, MP_BC_STORE_FAST_1); break;
        case 2: emit_write_byte_code_byte(emit, MP_BC_STORE_FAST_2); break;
        default: emit_write_byte_code_byte_uint(emit, MP_BC_STORE_FAST_N, local_num); break;
Damien's avatar
Damien committed
457
458
459
    }
}

460
STATIC void emit_bc_store_deref(emit_t *emit, qstr qstr, int local_num) {
Damien's avatar
Damien committed
461
    emit_pre(emit, -1);
462
    emit_write_byte_code_byte_uint(emit, MP_BC_STORE_DEREF, local_num);
Damien's avatar
Damien committed
463
464
}

465
STATIC void emit_bc_store_name(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
466
    emit_pre(emit, -1);
467
    emit_write_byte_code_byte_qstr(emit, MP_BC_STORE_NAME, qstr);
Damien's avatar
Damien committed
468
469
}

470
STATIC void emit_bc_store_global(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
471
    emit_pre(emit, -1);
472
    emit_write_byte_code_byte_qstr(emit, MP_BC_STORE_GLOBAL, qstr);
Damien's avatar
Damien committed
473
474
}

475
STATIC void emit_bc_store_attr(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
476
    emit_pre(emit, -2);
477
    emit_write_byte_code_byte_qstr(emit, MP_BC_STORE_ATTR, qstr);
Damien's avatar
Damien committed
478
479
}

480
STATIC void emit_bc_store_subscr(emit_t *emit) {
Damien's avatar
Damien committed
481
    emit_pre(emit, -3);
482
    emit_write_byte_code_byte(emit, MP_BC_STORE_SUBSCR);
Damien's avatar
Damien committed
483
484
}

485
STATIC void emit_bc_store_locals(emit_t *emit) {
486
    // not needed
487
    emit_pre(emit, -1);
488
    emit_write_byte_code_byte(emit, MP_BC_POP_TOP);
489
490
}

491
STATIC void emit_bc_delete_fast(emit_t *emit, qstr qstr, int local_num) {
Damien's avatar
Damien committed
492
493
    assert(local_num >= 0);
    emit_pre(emit, 0);
494
    emit_write_byte_code_byte_uint(emit, MP_BC_DELETE_FAST_N, local_num);
Damien's avatar
Damien committed
495
496
}

497
STATIC void emit_bc_delete_deref(emit_t *emit, qstr qstr, int local_num) {
Damien's avatar
Damien committed
498
    emit_pre(emit, 0);
499
    emit_write_byte_code_byte_qstr(emit, MP_BC_DELETE_DEREF, local_num);
Damien's avatar
Damien committed
500
501
}

502
STATIC void emit_bc_delete_name(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
503
    emit_pre(emit, 0);
504
    emit_write_byte_code_byte_qstr(emit, MP_BC_DELETE_NAME, qstr);
Damien's avatar
Damien committed
505
506
}

507
STATIC void emit_bc_delete_global(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
508
    emit_pre(emit, 0);
509
    emit_write_byte_code_byte_qstr(emit, MP_BC_DELETE_GLOBAL, qstr);
Damien's avatar
Damien committed
510
511
}

512
STATIC void emit_bc_delete_attr(emit_t *emit, qstr qstr) {
Damien's avatar
Damien committed
513
    emit_pre(emit, -1);
514
    emit_write_byte_code_byte_qstr(emit, MP_BC_DELETE_ATTR, qstr);
Damien's avatar
Damien committed
515
516
}

517
STATIC void emit_bc_delete_subscr(emit_t *emit) {
Damien's avatar
Damien committed
518
    emit_pre(emit, -2);
519
    emit_write_byte_code_byte(emit, MP_BC_DELETE_SUBSCR);
Damien's avatar
Damien committed
520
521
}

522
STATIC void emit_bc_dup_top(emit_t *emit) {
Damien's avatar
Damien committed
523
    emit_pre(emit, 1);
524
    emit_write_byte_code_byte(emit, MP_BC_DUP_TOP);
Damien's avatar
Damien committed
525
526
}

527
STATIC void emit_bc_dup_top_two(emit_t *emit) {
Damien's avatar
Damien committed
528
    emit_pre(emit, 2);
529
    emit_write_byte_code_byte(emit, MP_BC_DUP_TOP_TWO);
Damien's avatar
Damien committed
530
531
}

532
STATIC void emit_bc_pop_top(emit_t *emit) {
Damien's avatar
Damien committed
533
    emit_pre(emit, -1);
534
    emit_write_byte_code_byte(emit, MP_BC_POP_TOP);
Damien's avatar
Damien committed
535
536
}

537
STATIC void emit_bc_rot_two(emit_t *emit) {
Damien's avatar
Damien committed
538
    emit_pre(emit, 0);
539
    emit_write_byte_code_byte(emit, MP_BC_ROT_TWO);
Damien's avatar
Damien committed
540
541
}

542
STATIC void emit_bc_rot_three(emit_t *emit) {
Damien's avatar
Damien committed
543
    emit_pre(emit, 0);
544
    emit_write_byte_code_byte(emit, MP_BC_ROT_THREE);
Damien's avatar
Damien committed
545
546
}

547
STATIC void emit_bc_jump(emit_t *emit, int label) {
Damien's avatar
Damien committed
548
    emit_pre(emit, 0);
549
    emit_write_byte_code_byte_signed_label(emit, MP_BC_JUMP, label);
Damien's avatar
Damien committed
550
551
}

552
STATIC void emit_bc_pop_jump_if_true(emit_t *emit, int label) {
Damien's avatar
Damien committed
553
    emit_pre(emit, -1);
554
    emit_write_byte_code_byte_signed_label(emit, MP_BC_POP_JUMP_IF_TRUE, label);
Damien's avatar
Damien committed
555
556
}

557
STATIC void emit_bc_pop_jump_if_false(emit_t *emit, int label) {
Damien's avatar
Damien committed
558
    emit_pre(emit, -1);
559
    emit_write_byte_code_byte_signed_label(emit, MP_BC_POP_JUMP_IF_FALSE, label);
Damien's avatar
Damien committed
560
561
}

562
STATIC void emit_bc_jump_if_true_or_pop(emit_t *emit, int label) {
Damien's avatar
Damien committed
563
    emit_pre(emit, -1);
564
    emit_write_byte_code_byte_signed_label(emit, MP_BC_JUMP_IF_TRUE_OR_POP, label);
Damien's avatar
Damien committed
565
566
}

567
STATIC void emit_bc_jump_if_false_or_pop(emit_t *emit, int label) {
Damien's avatar
Damien committed
568
    emit_pre(emit, -1);
569
    emit_write_byte_code_byte_signed_label(emit, MP_BC_JUMP_IF_FALSE_OR_POP, label);
Damien's avatar
Damien committed
570
571
}

572
STATIC void emit_bc_setup_loop(emit_t *emit, int label) {
Damien's avatar
Damien committed
573
    emit_pre(emit, 0);
574
    emit_write_byte_code_byte_unsigned_label(emit, MP_BC_SETUP_LOOP, label);
Damien's avatar
Damien committed
575
576
}

577
STATIC void emit_bc_unwind_jump(emit_t *emit, int label, int except_depth) {
578
579
580
581
582
583
584
    if (except_depth == 0) {
        emit_bc_jump(emit, label);
    } else {
        emit_pre(emit, 0);
        emit_write_byte_code_byte_signed_label(emit, MP_BC_UNWIND_JUMP, label);
        emit_write_byte_code_byte(emit, except_depth);
    }
Damien's avatar
Damien committed
585
586
}

587
STATIC void emit_bc_setup_with(emit_t *emit, int label) {
Damien's avatar
Damien committed
588
    emit_pre(emit, 7);
589
    emit_write_byte_code_byte_unsigned_label(emit, MP_BC_SETUP_WITH, label);
Damien's avatar
Damien committed
590
591
}

592
STATIC void emit_bc_with_cleanup(emit_t *emit) {
Damien's avatar
Damien committed
593
    emit_pre(emit, -7);
594
    emit_write_byte_code_byte(emit, MP_BC_WITH_CLEANUP);
Damien's avatar
Damien committed
595
596
}

597
STATIC void emit_bc_setup_except(emit_t *emit, int label) {
Damien's avatar
Damien committed
598
    emit_pre(emit, 6);
599
    emit_write_byte_code_byte_unsigned_label(emit, MP_BC_SETUP_EXCEPT, label);
Damien's avatar
Damien committed
600
601
}

602
STATIC void emit_bc_setup_finally(emit_t *emit, int label) {
Damien's avatar
Damien committed
603
    emit_pre(emit, 6);
604
    emit_write_byte_code_byte_unsigned_label(emit, MP_BC_SETUP_FINALLY, label);
Damien's avatar
Damien committed
605
606
}

607
STATIC void emit_bc_end_finally(emit_t *emit) {
Damien's avatar
Damien committed
608
    emit_pre(emit, -1);
609
    emit_write_byte_code_byte(emit, MP_BC_END_FINALLY);
Damien's avatar
Damien committed
610
611
}

612
STATIC void emit_bc_get_iter(emit_t *emit) {
Damien's avatar
Damien committed
613
    emit_pre(emit, 0);
614
    emit_write_byte_code_byte(emit, MP_BC_GET_ITER);
Damien's avatar
Damien committed
615
616
}

617
STATIC void emit_bc_for_iter(emit_t *emit, int label) {
Damien's avatar
Damien committed
618
    emit_pre(emit, 1);
619
    emit_write_byte_code_byte_unsigned_label(emit, MP_BC_FOR_ITER, label);
Damien's avatar
Damien committed
620
621
}

622
STATIC void emit_bc_for_iter_end(emit_t *emit) {
Damien's avatar
Damien committed
623
624
625
    emit_pre(emit, -1);
}

626
STATIC void emit_bc_pop_block(emit_t *emit) {
Damien's avatar
Damien committed
627
    emit_pre(emit, 0);
628
    emit_write_byte_code_byte(emit, MP_BC_POP_BLOCK);
Damien's avatar
Damien committed
629
630
}

631
STATIC void emit_bc_pop_except(emit_t *emit) {
Damien's avatar
Damien committed
632
    emit_pre(emit, 0);
633
    emit_write_byte_code_byte(emit, MP_BC_POP_EXCEPT);
Damien's avatar
Damien committed
634
635
}

636
STATIC void emit_bc_unary_op(emit_t *emit, rt_unary_op_t op) {
637
638
639
640
641
642
643
644
645
    if (op == RT_UNARY_OP_NOT) {
        emit_pre(emit, 0);
        emit_write_byte_code_byte_byte(emit, MP_BC_UNARY_OP, RT_UNARY_OP_BOOL);
        emit_pre(emit, 0);
        emit_write_byte_code_byte(emit, MP_BC_NOT);
    } else {
        emit_pre(emit, 0);
        emit_write_byte_code_byte_byte(emit, MP_BC_UNARY_OP, op);
    }
Damien's avatar
Damien committed
646
647
}

648
STATIC void emit_bc_binary_op(emit_t *emit, rt_binary_op_t op) {
649
650
651
652
653
654
655
656
    bool invert = false;
    if (op == RT_BINARY_OP_NOT_IN) {
        invert = true;
        op = RT_BINARY_OP_IN;
    } else if (op == RT_BINARY_OP_IS_NOT) {
        invert = true;
        op = RT_BINARY_OP_IS;
    }
Damien's avatar
Damien committed
657
    emit_pre(emit, -1);
658
    emit_write_byte_code_byte_byte(emit, MP_BC_BINARY_OP, op);
659
660
661
662
    if (invert) {
        emit_pre(emit, 0);
        emit_write_byte_code_byte(emit, MP_BC_NOT);
    }
Damien's avatar
Damien committed
663
664
}

665
STATIC void emit_bc_build_tuple(emit_t *emit, int n_args) {
Damien's avatar
Damien committed
666
667
    assert(n_args >= 0);
    emit_pre(emit, 1 - n_args);
668
    emit_write_byte_code_byte_uint(emit, MP_BC_BUILD_TUPLE, n_args);
Damien's avatar
Damien committed
669
670
}

671
STATIC void emit_bc_build_list(emit_t *emit, int n_args) {
Damien's avatar
Damien committed
672
673
    assert(n_args >= 0);
    emit_pre(emit, 1 - n_args);
674
    emit_write_byte_code_byte_uint(emit, MP_BC_BUILD_LIST, n_args);
Damien's avatar
Damien committed
675
676
}

677
STATIC void emit_bc_list_append(emit_t *emit, int list_stack_index) {
Damien's avatar
Damien committed
678
679
    assert(list_stack_index >= 0);
    emit_pre(emit, -1);
680
    emit_write_byte_code_byte_uint(emit, MP_BC_LIST_APPEND, list_stack_index);
Damien's avatar
Damien committed
681
682
}

683
STATIC void emit_bc_build_map(emit_t *emit, int n_args) {
Damien's avatar
Damien committed
684
685
    assert(n_args >= 0);
    emit_pre(emit, 1);
686
    emit_write_byte_code_byte_uint(emit, MP_BC_BUILD_MAP, n_args);
Damien's avatar
Damien committed
687
688
}

689
STATIC void emit_bc_store_map(emit_t *emit) {
Damien's avatar
Damien committed
690
    emit_pre(emit, -2);
691
    emit_write_byte_code_byte(emit, MP_BC_STORE_MAP);
Damien's avatar
Damien committed
692
693
}

694
STATIC void emit_bc_map_add(emit_t *emit, int map_stack_index) {
Damien's avatar
Damien committed
695
696
    assert(map_stack_index >= 0);
    emit_pre(emit, -2);
697
    emit_write_byte_code_byte_uint(emit, MP_BC_MAP_ADD, map_stack_index);
Damien's avatar
Damien committed
698
699
}

700
STATIC void emit_bc_build_set(emit_t *emit, int n_args) {
Damien's avatar
Damien committed
701
702
    assert(n_args >= 0);
    emit_pre(emit, 1 - n_args);
703
    emit_write_byte_code_byte_uint(emit, MP_BC_BUILD_SET, n_args);
Damien's avatar
Damien committed
704
705
}

706
STATIC void emit_bc_set_add(emit_t *emit, int set_stack_index) {
Damien's avatar
Damien committed
707
708
    assert(set_stack_index >= 0);
    emit_pre(emit, -1);
709
    emit_write_byte_code_byte_uint(emit, MP_BC_SET_ADD, set_stack_index);
Damien's avatar
Damien committed
710
711
}

712
STATIC void emit_bc_build_slice(emit_t *emit, int n_args) {
Damien's avatar
Damien committed
713
714
    assert(n_args >= 0);
    emit_pre(emit, 1 - n_args);
715
    emit_write_byte_code_byte_uint(emit, MP_BC_BUILD_SLICE, n_args);
Damien's avatar
Damien committed
716
717
}

718
STATIC void emit_bc_unpack_sequence(emit_t *emit, int n_args) {
Damien's avatar
Damien committed
719
720
    assert(n_args >= 0);
    emit_pre(emit, -1 + n_args);
721
    emit_write_byte_code_byte_uint(emit, MP_BC_UNPACK_SEQUENCE, n_args);
Damien's avatar
Damien committed
722
723
}

724
STATIC void emit_bc_unpack_ex(emit_t *emit, int n_left, int n_right) {
Damien's avatar
Damien committed
725
726
    assert(n_left >=0 && n_right >= 0);
    emit_pre(emit, -1 + n_left + n_right + 1);
727
    emit_write_byte_code_byte_uint(emit, MP_BC_UNPACK_EX, n_left | (n_right << 8));
Damien's avatar
Damien committed
728
729
}

730
STATIC void emit_bc_make_function(emit_t *emit, scope_t *scope, int n_dict_params, int n_default_params) {
731
    assert(n_dict_params == 0);
732
733
734
735
    if (n_default_params == 0) {
        emit_pre(emit, 1);
        emit_write_byte_code_byte_uint(emit, MP_BC_MAKE_FUNCTION, scope->unique_code_id);
    } else {
736
737
738
        emit_pre(emit, 0);
        emit_write_byte_code_byte_uint(emit, MP_BC_MAKE_FUNCTION_DEFARGS, scope->unique_code_id);
    }
Damien's avatar
Damien committed
739
740
}

741
STATIC void emit_bc_make_closure(emit_t *emit, scope_t *scope, int n_dict_params, int n_default_params) {
742
743
744
745
746
747
748
749
    assert(n_dict_params == 0);
    if (n_default_params == 0) {
        emit_pre(emit, 0);
        emit_write_byte_code_byte_uint(emit, MP_BC_MAKE_CLOSURE, scope->unique_code_id);
    } else {
        emit_pre(emit, -1);
        emit_write_byte_code_byte_uint(emit, MP_BC_MAKE_CLOSURE_DEFARGS, scope->unique_code_id);
    }
Damien's avatar
Damien committed
750
751
}

752
STATIC void emit_bc_call_function(emit_t *emit, int n_positional, int n_keyword, bool have_star_arg, bool have_dbl_star_arg) {
Damien's avatar
Damien committed
753
754
755
756
757
758
759
760
761
762
763
    int s = 0;
    if (have_star_arg) {
        s += 1;
    }
    if (have_dbl_star_arg) {
        s += 1;
    }
    emit_pre(emit, -n_positional - 2 * n_keyword - s);
    int op;
    if (have_star_arg) {
        if (have_dbl_star_arg) {
764
            op = MP_BC_CALL_FUNCTION_VAR_KW;
Damien's avatar
Damien committed
765
        } else {
766
            op = MP_BC_CALL_FUNCTION_VAR;
Damien's avatar
Damien committed
767
768
769
        }
    } else {
        if (have_dbl_star_arg) {
770
            op = MP_BC_CALL_FUNCTION_KW;
Damien's avatar
Damien committed
771
        } else {
772
            op = MP_BC_CALL_FUNCTION;
Damien's avatar
Damien committed
773
774
        }
    }
775
    emit_write_byte_code_byte_uint(emit, op, (n_keyword << 8) | n_positional); // TODO make it 2 separate uints
Damien's avatar
Damien committed
776
777
}

778
STATIC void emit_bc_call_method(emit_t *emit, int n_positional, int n_keyword, bool have_star_arg, bool have_dbl_star_arg) {
Damien's avatar
Damien committed
779
780
781
782
783
784
785
    int s = 0;
    if (have_star_arg) {
        s += 1;
    }
    if (have_dbl_star_arg) {
        s += 1;
    }
786
    emit_pre(emit, -1 - n_positional - 2 * n_keyword - s);
Damien's avatar
Damien committed
787
788
789
    int op;
    if (have_star_arg) {
        if (have_dbl_star_arg) {
790
            op = MP_BC_CALL_METHOD_VAR_KW;
Damien's avatar
Damien committed
791
        } else {
792
            op = MP_BC_CALL_METHOD_VAR;
Damien's avatar
Damien committed
793
794
795
        }
    } else {
        if (have_dbl_star_arg) {
796
            op = MP_BC_CALL_METHOD_KW;
Damien's avatar
Damien committed
797
        } else {
798
            op = MP_BC_CALL_METHOD;
Damien's avatar
Damien committed
799
800
        }
    }
801
    emit_write_byte_code_byte_uint(emit, op, (n_keyword << 8) | n_positional); // TODO make it 2 separate uints
Damien's avatar
Damien committed
802
803
}

804
STATIC void emit_bc_return_value(emit_t *emit) {
Damien's avatar
Damien committed
805
806
    emit_pre(emit, -1);
    emit->last_emit_was_return_value = true;
807
    emit_write_byte_code_byte(emit, MP_BC_RETURN_VALUE);
Damien's avatar
Damien committed
808
809
}

810
STATIC void emit_bc_raise_varargs(emit_t *emit, int n_args) {
811
    assert(0 <= n_args && n_args <= 2);
Damien's avatar
Damien committed
812
    emit_pre(emit, -n_args);
813
    emit_write_byte_code_byte_byte(emit, MP_BC_RAISE_VARARGS, n_args);
Damien's avatar
Damien committed
814
815
}

816
STATIC void emit_bc_yield_value(emit_t *emit) {
Damien's avatar
Damien committed
817
818
    emit_pre(emit, 0);
    if (emit->pass == PASS_2) {
819
        emit->scope->scope_flags |= MP_SCOPE_FLAG_GENERATOR;
Damien's avatar
Damien committed
820
    }
821
    emit_write_byte_code_byte(emit, MP_BC_YIELD_VALUE);
Damien's avatar
Damien committed
822
823
}

824
STATIC void emit_bc_yield_from(emit_t *emit) {
Damien's avatar
Damien committed
825
826
    emit_pre(emit, -1);
    if (emit->pass == PASS_2) {
827
        emit->scope->scope_flags |= MP_SCOPE_FLAG_GENERATOR;
Damien's avatar
Damien committed
828
    }
829
    emit_write_byte_code_byte(emit, MP_BC_YIELD_FROM);
Damien's avatar
Damien committed
830
831
}

832
const emit_method_table_t emit_bc_method_table = {
833
834
835
836
837
838
    emit_bc_set_native_types,
    emit_bc_start_pass,
    emit_bc_end_pass,
    emit_bc_last_emit_was_return_value,
    emit_bc_get_stack_size,
    emit_bc_set_stack_size,
839
    emit_bc_set_source_line,
840

841
842
843
844
    emit_bc_load_id,
    emit_bc_store_id,
    emit_bc_delete_id,

845
846
847
848
849
850
851
852
853
854
855
856
857
858
    emit_bc_label_assign,
    emit_bc_import_name,
    emit_bc_import_from,
    emit_bc_import_star,
    emit_bc_load_const_tok,
    emit_bc_load_const_small_int,
    emit_bc_load_const_int,
    emit_bc_load_const_dec,
    emit_bc_load_const_id,
    emit_bc_load_const_str,
    emit_bc_load_const_verbatim_str,
    emit_bc_load_fast,
    emit_bc_load_deref,
    emit_bc_load_closure,
Damien's avatar
Damien committed
859
860
    emit_bc_load_name,
    emit_bc_load_global,
861
862
863
864
    emit_bc_load_attr,
    emit_bc_load_method,
    emit_bc_load_build_class,
    emit_bc_store_fast,
Damien's avatar
Damien committed
865
    emit_bc_store_deref,
866
867
868
869
    emit_bc_store_name,
    emit_bc_store_global,
    emit_bc_store_attr,
    emit_bc_store_subscr,
870
    emit_bc_store_locals,
871
    emit_bc_delete_fast,
Damien's avatar
Damien committed
872
    emit_bc_delete_deref,
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
    emit_bc_delete_name,
    emit_bc_delete_global,
    emit_bc_delete_attr,
    emit_bc_delete_subscr,
    emit_bc_dup_top,
    emit_bc_dup_top_two,
    emit_bc_pop_top,
    emit_bc_rot_two,
    emit_bc_rot_three,
    emit_bc_jump,
    emit_bc_pop_jump_if_true,
    emit_bc_pop_jump_if_false,
    emit_bc_jump_if_true_or_pop,
    emit_bc_jump_if_false_or_pop,
    emit_bc_setup_loop,
888
889
    emit_bc_unwind_jump,
    emit_bc_unwind_jump,
890
891
892
893
894
895
896
897
898
899