emitnative.c 45 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
// Essentially normal Python has 1 type: Python objects
// Viper has more than 1 type, and is just a more complicated (a superset of) Python.
// If you declare everything in Viper as a Python object (ie omit type decls) then
// it should in principle be exactly the same as Python native.
// Having types means having more opcodes, like binary_op_nat_nat, binary_op_nat_obj etc.
// In practice we won't have a VM but rather do this in asm which is actually very minimal.

// Because it breaks strict Python equivalence it should be a completely separate
// decorator.  It breaks equivalence because overflow on integers wraps around.
// It shouldn't break equivalence if you don't use the new types, but since the
// type decls might be used in normal Python for other reasons, it's probably safest,
// cleanest and clearest to make it a separate decorator.

// Actually, it does break equivalence because integers default to native integers,
// not Python objects.

// for x in l[0:8]: can be compiled into a native loop if l has pointer type

#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>

#include "misc.h"
27
#include "mpconfig.h"
28
29
30
#include "lexer.h"
#include "parse.h"
#include "scope.h"
31
#include "runtime0.h"
32
#include "emit.h"
33
34
#include "obj.h"
#include "runtime.h"
35
36

// wrapper around everything in this file
37
#if (MICROPY_EMIT_X64 && N_X64) || (MICROPY_EMIT_THUMB && N_THUMB)
38

39
#if N_X64
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54

// x64 specific stuff

#include "asmx64.h"

#define REG_LOCAL_1 (REG_RBX)
#define REG_LOCAL_NUM (1)

#define EXPORT_FUN(name) emit_native_x64_##name

#define REG_TEMP0 (REG_RAX)
#define REG_TEMP1 (REG_RDI)
#define REG_TEMP2 (REG_RSI)
#define ASM_MOV_REG_TO_LOCAL(reg, local_num) asm_x64_mov_r64_to_local(emit->as, (reg), (local_num))
#define ASM_MOV_IMM_TO_REG(imm, reg) asm_x64_mov_i64_to_r64_optimised(emit->as, (imm), (reg))
55
#define ASM_MOV_IMM_TO_LOCAL_USING(imm, local_num, reg_temp) do { asm_x64_mov_i64_to_r64_optimised(emit->as, (imm), (reg_temp)); asm_x64_mov_r64_to_local(emit->as, (reg_temp), (local_num)); } while (false)
56
57
58
59
#define ASM_MOV_LOCAL_TO_REG(local_num, reg) asm_x64_mov_local_to_r64(emit->as, (local_num), (reg))
#define ASM_MOV_REG_TO_REG(reg_src, reg_dest) asm_x64_mov_r64_to_r64(emit->as, (reg_src), (reg_dest))
#define ASM_MOV_LOCAL_ADDR_TO_REG(local_num, reg) asm_x64_mov_local_addr_to_r64(emit->as, (local_num), (reg))

60
#elif N_THUMB
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77

// thumb specific stuff

#include "asmthumb.h"

#define REG_LOCAL_1 (REG_R4)
#define REG_LOCAL_2 (REG_R5)
#define REG_LOCAL_3 (REG_R6)
#define REG_LOCAL_NUM (3)

#define EXPORT_FUN(name) emit_native_thumb_##name

#define REG_TEMP0 (REG_R0)
#define REG_TEMP1 (REG_R1)
#define REG_TEMP2 (REG_R2)
#define ASM_MOV_REG_TO_LOCAL(reg, local_num) asm_thumb_mov_local_reg(emit->as, (local_num), (reg))
#define ASM_MOV_IMM_TO_REG(imm, reg) asm_thumb_mov_reg_i32_optimised(emit->as, (reg), (imm))
78
#define ASM_MOV_IMM_TO_LOCAL_USING(imm, local_num, reg_temp) do { asm_thumb_mov_reg_i32_optimised(emit->as, (reg_temp), (imm)); asm_thumb_mov_local_reg(emit->as, (local_num), (reg_temp)); } while (false)
79
80
81
82
83
84
85
#define ASM_MOV_LOCAL_TO_REG(local_num, reg) asm_thumb_mov_reg_local(emit->as, (reg), (local_num))
#define ASM_MOV_REG_TO_REG(reg_src, reg_dest) asm_thumb_mov_reg_reg(emit->as, (reg_dest), (reg_src))
#define ASM_MOV_LOCAL_ADDR_TO_REG(local_num, reg) asm_thumb_mov_reg_local_addr(emit->as, (reg), (local_num))

#endif

typedef enum {
86
87
88
89
    STACK_VALUE,
    STACK_REG,
    STACK_IMM,
} stack_info_kind_t;
90
91
92
93
94
95
96
97
98
99
100

typedef enum {
    VTYPE_UNBOUND,
    VTYPE_PYOBJ,
    VTYPE_BOOL,
    VTYPE_INT,
    VTYPE_PTR,
    VTYPE_PTR_NONE,
    VTYPE_BUILTIN_V_INT,
} vtype_kind_t;

101
102
103
104
105
106
107
108
109
typedef struct _stack_info_t {
    vtype_kind_t vtype;
    stack_info_kind_t kind;
    union {
        int u_reg;
        machine_int_t u_imm;
    };
} stack_info_t;

110
111
112
113
struct _emit_t {
    int pass;

    bool do_viper_types;
114
115

    int local_vtype_alloc;
116
    vtype_kind_t *local_vtype;
117
118
119
120

    int stack_info_alloc;
    stack_info_t *stack_info;

121
122
123
124
125
126
127
    int stack_start;
    int stack_size;

    bool last_emit_was_return_value;

    scope_t *scope;

128
#if N_X64
129
    asm_x64_t *as;
130
#elif N_THUMB
131
132
133
134
135
136
137
    asm_thumb_t *as;
#endif
};

emit_t *EXPORT_FUN(new)(uint max_num_labels) {
    emit_t *emit = m_new(emit_t, 1);
    emit->do_viper_types = false;
138
139
    emit->local_vtype = NULL;
    emit->stack_info = NULL;
140
#if N_X64
141
    emit->as = asm_x64_new(max_num_labels);
142
#elif N_THUMB
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
    emit->as = asm_thumb_new(max_num_labels);
#endif
    return emit;
}

static void emit_native_set_viper_types(emit_t *emit, bool do_viper_types) {
    emit->do_viper_types = do_viper_types;
}

static void emit_native_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scope) {
    emit->pass = pass;
    emit->stack_start = 0;
    emit->stack_size = 0;
    emit->last_emit_was_return_value = false;
    emit->scope = scope;

159
160
161
162
163
164
165
    if (emit->local_vtype == NULL) {
        emit->local_vtype_alloc = scope->num_locals + 20; // XXX should be maximum over all scopes
        emit->local_vtype = m_new(vtype_kind_t, emit->local_vtype_alloc);
    }
    if (emit->stack_info == NULL) {
        emit->stack_info_alloc = scope->stack_size + 50; // XXX don't know stack size on entry, should be maximum over all scopes
        emit->stack_info = m_new(stack_info_t, emit->stack_info_alloc);
166
167
168
169
    }

    if (emit->do_viper_types) {
        // TODO set types of arguments based on type signature
170
171
172
173
174
175
176
        for (int i = 0; i < emit->local_vtype_alloc; i++) {
            emit->local_vtype[i] = VTYPE_UNBOUND;
        }
        for (int i = 0; i < emit->stack_info_alloc; i++) {
            emit->stack_info[i].kind = STACK_VALUE;
            emit->stack_info[i].vtype = VTYPE_UNBOUND;
        }
177
    } else {
178
179
180
181
182
183
        for (int i = 0; i < emit->local_vtype_alloc; i++) {
            emit->local_vtype[i] = VTYPE_PYOBJ;
        }
        for (int i = 0; i < emit->stack_info_alloc; i++) {
            emit->stack_info[i].kind = STACK_VALUE;
            emit->stack_info[i].vtype = VTYPE_PYOBJ;
184
185
186
        }
    }

187
#if N_X64
188
    asm_x64_start_pass(emit->as, pass);
189
#elif N_THUMB
190
191
192
193
194
195
196
197
198
199
200
201
202
    asm_thumb_start_pass(emit->as, pass);
#endif

    // entry to function
    int num_locals = 0;
    if (pass > PASS_1) {
        num_locals = scope->num_locals - REG_LOCAL_NUM;
        if (num_locals < 0) {
            num_locals = 0;
        }
        emit->stack_start = num_locals;
        num_locals += scope->stack_size;
    }
203
#if N_X64
204
    asm_x64_entry(emit->as, num_locals);
205
#elif N_THUMB
206
207
208
209
    asm_thumb_entry(emit->as, num_locals);
#endif

    // initialise locals from parameters
210
#if N_X64
211
212
213
214
215
216
217
218
219
220
221
222
    for (int i = 0; i < scope->num_params; i++) {
        if (i == 0) {
            asm_x64_mov_r64_to_r64(emit->as, REG_ARG_1, REG_LOCAL_1);
        } else if (i == 1) {
            asm_x64_mov_r64_to_local(emit->as, REG_ARG_2, i - 1);
        } else if (i == 2) {
            asm_x64_mov_r64_to_local(emit->as, REG_ARG_3, i - 1);
        } else {
            // TODO not implemented
            assert(0);
        }
    }
223
#elif N_THUMB
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
    for (int i = 0; i < scope->num_params; i++) {
        if (i == 0) {
            asm_thumb_mov_reg_reg(emit->as, REG_LOCAL_1, REG_ARG_1);
        } else if (i == 1) {
            asm_thumb_mov_reg_reg(emit->as, REG_LOCAL_2, REG_ARG_2);
        } else if (i == 2) {
            asm_thumb_mov_reg_reg(emit->as, REG_LOCAL_3, REG_ARG_3);
        } else if (i == 3) {
            asm_thumb_mov_local_reg(emit->as, i - REG_LOCAL_NUM, REG_ARG_4);
        } else {
            // TODO not implemented
            assert(0);
        }
    }

    asm_thumb_mov_reg_i32(emit->as, REG_R7, (machine_uint_t)rt_fun_table);
#endif
}

static void emit_native_end_pass(emit_t *emit) {
244
#if N_X64
245
246
247
248
    if (!emit->last_emit_was_return_value) {
        asm_x64_exit(emit->as);
    }
    asm_x64_end_pass(emit->as);
249
#elif N_THUMB
250
251
252
253
254
255
256
257
258
259
260
261
    if (!emit->last_emit_was_return_value) {
        asm_thumb_exit(emit->as);
    }
    asm_thumb_end_pass(emit->as);
#endif

    // 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);
    }

    if (emit->pass == PASS_3) {
262
#if N_X64
263
        void *f = asm_x64_get_code(emit->as);
264
        rt_assign_native_code(emit->scope->unique_code_id, f, asm_x64_get_code_size(emit->as), emit->scope->num_params);
265
#elif N_THUMB
266
        void *f = asm_thumb_get_code(emit->as);
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
        rt_assign_native_code(emit->scope->unique_code_id, f, asm_thumb_get_code_size(emit->as), emit->scope->num_params);
#endif
    }
}

static bool emit_native_last_emit_was_return_value(emit_t *emit) {
    return emit->last_emit_was_return_value;
}

static int emit_native_get_stack_size(emit_t *emit) {
    return emit->stack_size;
}

static void emit_native_set_stack_size(emit_t *emit, int size) {
    emit->stack_size = size;
}

284
285
286
static void emit_native_set_source_line(emit_t *emit, int source_line) {
}

287
288
289
290
291
292
293
294
static void adjust_stack(emit_t *emit, int stack_size_delta) {
    emit->stack_size += stack_size_delta;
    assert(emit->stack_size >= 0);
    if (emit->pass > PASS_1 && emit->stack_size > emit->scope->stack_size) {
        emit->scope->stack_size = emit->stack_size;
    }
}

295
/*
296
297
298
299
static void emit_pre_raw(emit_t *emit, int stack_size_delta) {
    adjust_stack(emit, stack_size_delta);
    emit->last_emit_was_return_value = false;
}
300
*/
301

302
// this must be called at start of emit functions
303
static void emit_pre(emit_t *emit) {
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
    emit->last_emit_was_return_value = false;
    // settle the stack
    /*
    if (regs_needed != 0) {
        for (int i = 0; i < emit->stack_size; i++) {
            switch (emit->stack_info[i].kind) {
                case STACK_VALUE:
                    break;

                case STACK_REG:
                    // TODO only push reg if in regs_needed
                    emit->stack_info[i].kind = STACK_VALUE;
                    ASM_MOV_REG_TO_LOCAL(emit->stack_info[i].u_reg, emit->stack_start + i);
                    break;

                case STACK_IMM:
                    // don't think we ever need to push imms for settling
                    //ASM_MOV_IMM_TO_LOCAL(emit->last_imm, emit->stack_start + i);
                    break;
            }
        }
    }
    */
327
328
329
}

static vtype_kind_t peek_vtype(emit_t *emit) {
330
331
    return emit->stack_info[emit->stack_size - 1].vtype;
}
332

333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
// pos=1 is TOS, pos=2 is next, etc
// use pos=0 for no skipping
static void need_reg_single(emit_t *emit, int reg_needed, int skip_stack_pos) {
    skip_stack_pos = emit->stack_size - skip_stack_pos;
    for (int i = 0; i < emit->stack_size; i++) {
        if (i != skip_stack_pos) {
            stack_info_t *si = &emit->stack_info[i];
            if (si->kind == STACK_REG && si->u_reg == reg_needed) {
                si->kind = STACK_VALUE;
                ASM_MOV_REG_TO_LOCAL(si->u_reg, emit->stack_start + i);
            }
        }
    }
}

static void need_reg_all(emit_t *emit) {
349
350
    for (int i = 0; i < emit->stack_size; i++) {
        stack_info_t *si = &emit->stack_info[i];
351
        if (si->kind == STACK_REG) {
352
353
354
355
356
            si->kind = STACK_VALUE;
            ASM_MOV_REG_TO_LOCAL(si->u_reg, emit->stack_start + i);
        }
    }
}
357

358
static void need_stack_settled(emit_t *emit) {
359
360
361
362
363
364
    for (int i = 0; i < emit->stack_size; i++) {
        stack_info_t *si = &emit->stack_info[i];
        if (si->kind == STACK_REG) {
            si->kind = STACK_VALUE;
            ASM_MOV_REG_TO_LOCAL(si->u_reg, emit->stack_start + i);
        }
365
    }
366
367
368
369
370
371
    for (int i = 0; i < emit->stack_size; i++) {
        stack_info_t *si = &emit->stack_info[i];
        if (si->kind == STACK_IMM) {
            ASM_MOV_IMM_TO_LOCAL_USING(si->u_imm, emit->stack_start + i, REG_TEMP0);
        }
    }
372
373
}

374
375
376
377
// pos=1 is TOS, pos=2 is next, etc
static void emit_access_stack(emit_t *emit, int pos, vtype_kind_t *vtype, int reg_dest) {
    need_reg_single(emit, reg_dest, pos);
    stack_info_t *si = &emit->stack_info[emit->stack_size - pos];
378
379
380
    *vtype = si->vtype;
    switch (si->kind) {
        case STACK_VALUE:
381
            ASM_MOV_LOCAL_TO_REG(emit->stack_start + emit->stack_size - pos, reg_dest);
382
383
            break;

384
385
386
        case STACK_REG:
            if (si->u_reg != reg_dest) {
                ASM_MOV_REG_TO_REG(si->u_reg, reg_dest);
387
388
389
            }
            break;

390
391
        case STACK_IMM:
            ASM_MOV_IMM_TO_REG(si->u_imm, reg_dest);
392
393
394
395
            break;
    }
}

396
397
398
399
400
401
static void emit_pre_pop_reg(emit_t *emit, vtype_kind_t *vtype, int reg_dest) {
    emit->last_emit_was_return_value = false;
    emit_access_stack(emit, 1, vtype, reg_dest);
    adjust_stack(emit, -1);
}

402
403
static void emit_pre_pop_reg_reg(emit_t *emit, vtype_kind_t *vtypea, int rega, vtype_kind_t *vtypeb, int regb) {
    emit_pre_pop_reg(emit, vtypea, rega);
404
    emit_pre_pop_reg(emit, vtypeb, regb);
405
406
407
408
}

static void emit_pre_pop_reg_reg_reg(emit_t *emit, vtype_kind_t *vtypea, int rega, vtype_kind_t *vtypeb, int regb, vtype_kind_t *vtypec, int regc) {
    emit_pre_pop_reg(emit, vtypea, rega);
409
410
    emit_pre_pop_reg(emit, vtypeb, regb);
    emit_pre_pop_reg(emit, vtypec, regc);
411
412
413
414
415
416
}

static void emit_post(emit_t *emit) {
}

static void emit_post_push_reg(emit_t *emit, vtype_kind_t vtype, int reg) {
417
418
419
420
421
    stack_info_t *si = &emit->stack_info[emit->stack_size];
    si->vtype = vtype;
    si->kind = STACK_REG;
    si->u_reg = reg;
    adjust_stack(emit, 1);
422
423
424
}

static void emit_post_push_imm(emit_t *emit, vtype_kind_t vtype, machine_int_t imm) {
425
426
427
428
429
    stack_info_t *si = &emit->stack_info[emit->stack_size];
    si->vtype = vtype;
    si->kind = STACK_IMM;
    si->u_imm = imm;
    adjust_stack(emit, 1);
430
431
432
}

static void emit_post_push_reg_reg(emit_t *emit, vtype_kind_t vtypea, int rega, vtype_kind_t vtypeb, int regb) {
433
434
    emit_post_push_reg(emit, vtypea, rega);
    emit_post_push_reg(emit, vtypeb, regb);
435
436
437
}

static void emit_post_push_reg_reg_reg(emit_t *emit, vtype_kind_t vtypea, int rega, vtype_kind_t vtypeb, int regb, vtype_kind_t vtypec, int regc) {
438
439
440
    emit_post_push_reg(emit, vtypea, rega);
    emit_post_push_reg(emit, vtypeb, regb);
    emit_post_push_reg(emit, vtypec, regc);
441
442
443
}

static void emit_post_push_reg_reg_reg_reg(emit_t *emit, vtype_kind_t vtypea, int rega, vtype_kind_t vtypeb, int regb, vtype_kind_t vtypec, int regc, vtype_kind_t vtyped, int regd) {
444
445
446
447
    emit_post_push_reg(emit, vtypea, rega);
    emit_post_push_reg(emit, vtypeb, regb);
    emit_post_push_reg(emit, vtypec, regc);
    emit_post_push_reg(emit, vtyped, regd);
448
449
450
}

// vtype of all n_pop objects is VTYPE_PYOBJ
451
// does not use any temporary registers (but may use reg_dest before loading it with stack pointer)
452
// TODO this needs some thinking for viper code
453
static void emit_get_stack_pointer_to_reg_for_pop(emit_t *emit, int reg_dest, int n_pop) {
454
    need_reg_all(emit);
455
    for (int i = 0; i < n_pop; i++) {
456
457
        stack_info_t *si = &emit->stack_info[emit->stack_size - 1 - i];
        // must push any imm's to stack
458
        // must convert them to VTYPE_PYOBJ for viper code
459
460
        if (si->kind == STACK_IMM) {
            si->kind = STACK_VALUE;
461
462
463
464
465
466
467
            switch (si->vtype) {
                case VTYPE_PYOBJ:
                    ASM_MOV_IMM_TO_LOCAL_USING(si->u_imm, emit->stack_start + emit->stack_size - 1 - i, reg_dest);
                    break;
                case VTYPE_BOOL:
                    si->vtype = VTYPE_PYOBJ;
                    if (si->u_imm == 0) {
468
                        ASM_MOV_IMM_TO_LOCAL_USING((machine_uint_t)mp_const_false, emit->stack_start + emit->stack_size - 1 - i, reg_dest);
469
                    } else {
470
                        ASM_MOV_IMM_TO_LOCAL_USING((machine_uint_t)mp_const_true, emit->stack_start + emit->stack_size - 1 - i, reg_dest);
471
472
473
474
475
476
477
478
479
480
                    }
                    break;
                case VTYPE_INT:
                    si->vtype = VTYPE_PYOBJ;
                    ASM_MOV_IMM_TO_LOCAL_USING((si->u_imm << 1) | 1, emit->stack_start + emit->stack_size - 1 - i, reg_dest);
                    break;
                default:
                    // not handled
                    assert(0);
            }
481
482
483
        }
        assert(si->kind == STACK_VALUE);
        assert(si->vtype == VTYPE_PYOBJ);
484
    }
485
486
487
488
489
490
    ASM_MOV_LOCAL_ADDR_TO_REG(emit->stack_start + emit->stack_size - 1, reg_dest);
    adjust_stack(emit, -n_pop);
}

// vtype of all n_push objects is VTYPE_PYOBJ
static void emit_get_stack_pointer_to_reg_for_push(emit_t *emit, int reg_dest, int n_push) {
491
    need_reg_all(emit);
492
    for (int i = 0; i < n_push; i++) {
493
        emit->stack_info[emit->stack_size + i].kind = STACK_VALUE;
494
        emit->stack_info[emit->stack_size + i].vtype = VTYPE_PYOBJ;
495
496
497
498
499
500
    }
    ASM_MOV_LOCAL_ADDR_TO_REG(emit->stack_start + emit->stack_size + n_push - 1, reg_dest);
    adjust_stack(emit, n_push);
}

static void emit_call(emit_t *emit, rt_fun_kind_t fun_kind, void *fun) {
501
    need_reg_all(emit);
502
#if N_X64
503
    asm_x64_call_ind(emit->as, fun, REG_RAX);
504
#elif N_THUMB
505
506
507
508
509
    asm_thumb_bl_ind(emit->as, rt_fun_table[fun_kind], fun_kind, REG_R3);
#endif
}

static void emit_call_with_imm_arg(emit_t *emit, rt_fun_kind_t fun_kind, void *fun, machine_int_t arg_val, int arg_reg) {
510
    need_reg_all(emit);
511
    ASM_MOV_IMM_TO_REG(arg_val, arg_reg);
512
513
514
515
516
#if N_X64
    asm_x64_call_ind(emit->as, fun, REG_RAX);
#elif N_THUMB
    asm_thumb_bl_ind(emit->as, rt_fun_table[fun_kind], fun_kind, REG_R3);
#endif
517
518
519
520
521
}

static void emit_native_load_id(emit_t *emit, qstr qstr) {
    // check for built-ins
    if (strcmp(qstr_str(qstr), "v_int") == 0) {
522
        assert(0);
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
        emit_pre(emit);
        //emit_post_push_blank(emit, VTYPE_BUILTIN_V_INT);

    // not a built-in, so do usual thing
    } else {
        emit_common_load_id(emit, &EXPORT_FUN(method_table), emit->scope, qstr);
    }
}

static void emit_native_store_id(emit_t *emit, qstr qstr) {
    // TODO check for built-ins and disallow
    emit_common_store_id(emit, &EXPORT_FUN(method_table), emit->scope, qstr);
}

static void emit_native_delete_id(emit_t *emit, qstr qstr) {
    // TODO check for built-ins and disallow
    emit_common_delete_id(emit, &EXPORT_FUN(method_table), emit->scope, qstr);
}

static void emit_native_label_assign(emit_t *emit, int l) {
543
    emit_pre(emit);
544
545
    // need to commit stack because we can jump here from elsewhere
    need_stack_settled(emit);
546
#if N_X64
547
    asm_x64_label_assign(emit->as, l);
548
#elif N_THUMB
549
550
    asm_thumb_label_assign(emit->as, l);
#endif
551
    emit_post(emit);
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
}

static void emit_native_import_name(emit_t *emit, qstr qstr) {
    // not implemented
    assert(0);
}

static void emit_native_import_from(emit_t *emit, qstr qstr) {
    // not implemented
    assert(0);
}

static void emit_native_import_star(emit_t *emit) {
    // not implemented
    assert(0);
}

569
static void emit_native_load_const_tok(emit_t *emit, mp_token_kind_t tok) {
570
571
572
573
574
    emit_pre(emit);
    int vtype;
    machine_uint_t val;
    if (emit->do_viper_types) {
        switch (tok) {
575
576
577
            case MP_TOKEN_KW_NONE: vtype = VTYPE_PTR_NONE; val = 0; break;
            case MP_TOKEN_KW_FALSE: vtype = VTYPE_BOOL; val = 0; break;
            case MP_TOKEN_KW_TRUE: vtype = VTYPE_BOOL; val = 1; break;
578
579
580
581
582
            default: assert(0); vtype = 0; val = 0; // shouldn't happen
        }
    } else {
        vtype = VTYPE_PYOBJ;
        switch (tok) {
583
584
585
            case MP_TOKEN_KW_NONE: val = (machine_uint_t)mp_const_none; break;
            case MP_TOKEN_KW_FALSE: val = (machine_uint_t)mp_const_false; break;
            case MP_TOKEN_KW_TRUE: val = (machine_uint_t)mp_const_true; break;
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
            default: assert(0); vtype = 0; val = 0; // shouldn't happen
        }
    }
    emit_post_push_imm(emit, vtype, val);
}

static void emit_native_load_const_small_int(emit_t *emit, int arg) {
    emit_pre(emit);
    if (emit->do_viper_types) {
        emit_post_push_imm(emit, VTYPE_INT, arg);
    } else {
        emit_post_push_imm(emit, VTYPE_PYOBJ, (arg << 1) | 1);
    }
}

static void emit_native_load_const_int(emit_t *emit, qstr qstr) {
    // not implemented
    // load integer, check fits in 32 bits
    assert(0);
}

static void emit_native_load_const_dec(emit_t *emit, qstr qstr) {
608
609
610
611
    // for viper, a float/complex is just a Python object
    emit_pre(emit);
    emit_call_with_imm_arg(emit, RT_F_LOAD_CONST_DEC, rt_load_const_dec, qstr, REG_ARG_1);
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
612
613
614
}

static void emit_native_load_const_id(emit_t *emit, qstr qstr) {
615
616
617
618
619
620
621
    emit_pre(emit);
    if (emit->do_viper_types) {
        assert(0);
    } else {
        emit_call_with_imm_arg(emit, RT_F_LOAD_CONST_STR, rt_load_const_str, qstr, REG_ARG_1); // TODO
        emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
    }
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
}

static void emit_native_load_const_str(emit_t *emit, qstr qstr, bool bytes) {
    emit_pre(emit);
    if (emit->do_viper_types) {
        // not implemented properly
        // load a pointer to the asciiz string?
        assert(0);
        emit_post_push_imm(emit, VTYPE_PTR, (machine_uint_t)qstr_str(qstr));
    } else {
        emit_call_with_imm_arg(emit, RT_F_LOAD_CONST_STR, rt_load_const_str, qstr, REG_ARG_1);
        emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
    }
}

static void emit_native_load_const_verbatim_str(emit_t *emit, const char *str) {
    // not supported/needed for viper
    assert(0);
}

static void emit_native_load_fast(emit_t *emit, qstr qstr, int local_num) {
    vtype_kind_t vtype = emit->local_vtype[local_num];
    if (vtype == VTYPE_UNBOUND) {
        printf("ViperTypeError: local %s used before type known\n", qstr_str(qstr));
    }
    emit_pre(emit);
648
#if N_X64
649
650
651
    if (local_num == 0) {
        emit_post_push_reg(emit, vtype, REG_LOCAL_1);
    } else {
652
        need_reg_single(emit, REG_RAX, 0);
653
654
655
        asm_x64_mov_local_to_r64(emit->as, local_num - 1, REG_RAX);
        emit_post_push_reg(emit, vtype, REG_RAX);
    }
656
#elif N_THUMB
657
658
659
660
661
662
663
    if (local_num == 0) {
        emit_post_push_reg(emit, vtype, REG_LOCAL_1);
    } else if (local_num == 1) {
        emit_post_push_reg(emit, vtype, REG_LOCAL_2);
    } else if (local_num == 2) {
        emit_post_push_reg(emit, vtype, REG_LOCAL_3);
    } else {
664
        need_reg_single(emit, REG_R0, 0);
665
666
667
668
669
670
        asm_thumb_mov_reg_local(emit->as, REG_R0, local_num - 1);
        emit_post_push_reg(emit, vtype, REG_R0);
    }
#endif
}

Damien's avatar
Damien committed
671
672
673
674
675
676
677
678
679
680
681
static void emit_native_load_deref(emit_t *emit, qstr qstr, int local_num) {
    // not implemented
    // in principle could support this quite easily (ldr r0, [r0, #0]) and then get closed over variables!
    assert(0);
}

static void emit_native_load_closure(emit_t *emit, qstr qstr, int local_num) {
    // not implemented
    assert(0);
}

682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
static void emit_native_load_name(emit_t *emit, qstr qstr) {
    emit_pre(emit);
    emit_call_with_imm_arg(emit, RT_F_LOAD_NAME, rt_load_name, qstr, REG_ARG_1);
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}

static void emit_native_load_global(emit_t *emit, qstr qstr) {
    emit_pre(emit);
    emit_call_with_imm_arg(emit, RT_F_LOAD_GLOBAL, rt_load_global, qstr, REG_ARG_1);
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}

static void emit_native_load_attr(emit_t *emit, qstr qstr) {
    // depends on type of subject:
    //  - integer, function, pointer to integers: error
    //  - pointer to structure: get member, quite easy
    //  - Python object: call rt_load_attr, and needs to be typed to convert result
    vtype_kind_t vtype_base;
    emit_pre_pop_reg(emit, &vtype_base, REG_ARG_1); // arg1 = base
    assert(vtype_base == VTYPE_PYOBJ);
    emit_call_with_imm_arg(emit, RT_F_LOAD_ATTR, rt_load_attr, qstr, REG_ARG_2); // arg2 = attribute name
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}

static void emit_native_load_method(emit_t *emit, qstr qstr) {
    vtype_kind_t vtype_base;
    emit_pre_pop_reg(emit, &vtype_base, REG_ARG_1); // arg1 = base
    assert(vtype_base == VTYPE_PYOBJ);
    emit_get_stack_pointer_to_reg_for_push(emit, REG_ARG_3, 2); // arg3 = dest ptr
    emit_call_with_imm_arg(emit, RT_F_LOAD_METHOD, rt_load_method, qstr, REG_ARG_2); // arg2 = method name
}

static void emit_native_load_build_class(emit_t *emit) {
715
716
717
    emit_pre(emit);
    emit_call(emit, RT_F_LOAD_BUILD_CLASS, rt_load_build_class);
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
718
719
720
721
}

static void emit_native_store_fast(emit_t *emit, qstr qstr, int local_num) {
    vtype_kind_t vtype;
722
#if N_X64
723
724
725
726
727
728
    if (local_num == 0) {
        emit_pre_pop_reg(emit, &vtype, REG_LOCAL_1);
    } else {
        emit_pre_pop_reg(emit, &vtype, REG_RAX);
        asm_x64_mov_r64_to_local(emit->as, REG_RAX, local_num - 1);
    }
729
#elif N_THUMB
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
    if (local_num == 0) {
        emit_pre_pop_reg(emit, &vtype, REG_LOCAL_1);
    } else if (local_num == 1) {
        emit_pre_pop_reg(emit, &vtype, REG_LOCAL_2);
    } else if (local_num == 2) {
        emit_pre_pop_reg(emit, &vtype, REG_LOCAL_3);
    } else {
        emit_pre_pop_reg(emit, &vtype, REG_R0);
        asm_thumb_mov_local_reg(emit->as, local_num - 1, REG_R0);
    }
#endif

    emit_post(emit);

    // check types
    if (emit->local_vtype[local_num] == VTYPE_UNBOUND) {
        // first time this local is assigned, so give it a type of the object stored in it
        emit->local_vtype[local_num] = vtype;
    } else if (emit->local_vtype[local_num] != vtype) {
        // type of local is not the same as object stored in it
        printf("ViperTypeError: type mismatch, local %s has type %d but source object has type %d\n", qstr_str(qstr), emit->local_vtype[local_num], vtype);
    }
}

Damien's avatar
Damien committed
754
755
756
757
758
static void emit_native_store_deref(emit_t *emit, qstr qstr, int local_num) {
    // not implemented
    assert(0);
}

759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
static void emit_native_store_name(emit_t *emit, qstr qstr) {
    // rt_store_name, but needs conversion of object (maybe have rt_viper_store_name(obj, type))
    vtype_kind_t vtype;
    emit_pre_pop_reg(emit, &vtype, REG_ARG_2);
    assert(vtype == VTYPE_PYOBJ);
    emit_call_with_imm_arg(emit, RT_F_STORE_NAME, rt_store_name, qstr, REG_ARG_1); // arg1 = name
    emit_post(emit);
}

static void emit_native_store_global(emit_t *emit, qstr qstr) {
    // not implemented
    assert(0);
}

static void emit_native_store_attr(emit_t *emit, qstr qstr) {
774
775
776
777
778
779
    vtype_kind_t vtype_base, vtype_val;
    emit_pre_pop_reg_reg(emit, &vtype_base, REG_ARG_1, &vtype_val, REG_ARG_3); // arg1 = base, arg3 = value
    assert(vtype_base == VTYPE_PYOBJ);
    assert(vtype_val == VTYPE_PYOBJ);
    emit_call_with_imm_arg(emit, RT_F_STORE_ATTR, rt_store_attr, qstr, REG_ARG_2); // arg2 = attribute name
    emit_post(emit);
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
}

static void emit_native_store_subscr(emit_t *emit) {
    // depends on type of subject:
    //  - integer, function, pointer to structure: error
    //  - pointer to integers: store as per array
    //  - Python object: call runtime with converted object or type info
    vtype_kind_t vtype_index, vtype_base, vtype_value;
    emit_pre_pop_reg_reg_reg(emit, &vtype_index, REG_ARG_2, &vtype_base, REG_ARG_1, &vtype_value, REG_ARG_3); // index, base, value to store
    assert(vtype_index == VTYPE_PYOBJ);
    assert(vtype_base == VTYPE_PYOBJ);
    assert(vtype_value == VTYPE_PYOBJ);
    emit_call(emit, RT_F_STORE_SUBSCR, rt_store_subscr);
}

795
796
797
798
799
800
801
static void emit_native_store_locals(emit_t *emit) {
    // not needed
    vtype_kind_t vtype;
    emit_pre_pop_reg(emit, &vtype, REG_TEMP0);
    emit_post(emit);
}

802
803
804
805
806
807
static void emit_native_delete_fast(emit_t *emit, qstr qstr, int local_num) {
    // not implemented
    // could support for Python types, just set to None (so GC can reclaim it)
    assert(0);
}

Damien's avatar
Damien committed
808
809
810
811
812
static void emit_native_delete_deref(emit_t *emit, qstr qstr, int local_num) {
    // not supported
    assert(0);
}

813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
static void emit_native_delete_name(emit_t *emit, qstr qstr) {
    // not implemented
    // use rt_delete_name
    assert(0);
}

static void emit_native_delete_global(emit_t *emit, qstr qstr) {
    // not implemented
    // use rt_delete_global
    assert(0);
}

static void emit_native_delete_attr(emit_t *emit, qstr qstr) {
    // not supported
    assert(0);
}

static void emit_native_delete_subscr(emit_t *emit) {
    // not supported
    assert(0);
}

static void emit_native_dup_top(emit_t *emit) {
    vtype_kind_t vtype;
    emit_pre_pop_reg(emit, &vtype, REG_TEMP0);
    emit_post_push_reg_reg(emit, vtype, REG_TEMP0, vtype, REG_TEMP0);
}

static void emit_native_dup_top_two(emit_t *emit) {
    vtype_kind_t vtype0, vtype1;
    emit_pre_pop_reg_reg(emit, &vtype0, REG_TEMP0, &vtype1, REG_TEMP1);
    emit_post_push_reg_reg_reg_reg(emit, vtype1, REG_TEMP1, vtype0, REG_TEMP0, vtype1, REG_TEMP1, vtype0, REG_TEMP0);
}

static void emit_native_pop_top(emit_t *emit) {
    vtype_kind_t vtype;
    emit_pre_pop_reg(emit, &vtype, REG_TEMP0);
    emit_post(emit);
}

static void emit_native_rot_two(emit_t *emit) {
854
855
856
    vtype_kind_t vtype0, vtype1;
    emit_pre_pop_reg_reg(emit, &vtype0, REG_TEMP0, &vtype1, REG_TEMP1);
    emit_post_push_reg_reg(emit, vtype0, REG_TEMP0, vtype1, REG_TEMP1);
857
858
859
860
861
862
863
864
865
866
}

static void emit_native_rot_three(emit_t *emit) {
    vtype_kind_t vtype0, vtype1, vtype2;
    emit_pre_pop_reg_reg_reg(emit, &vtype0, REG_TEMP0, &vtype1, REG_TEMP1, &vtype2, REG_TEMP2);
    emit_post_push_reg_reg_reg(emit, vtype0, REG_TEMP0, vtype2, REG_TEMP2, vtype1, REG_TEMP1);
}

static void emit_native_jump(emit_t *emit, int label) {
    emit_pre(emit);
867
#if N_X64
868
    asm_x64_jmp_label(emit->as, label);
869
#elif N_THUMB
870
871
872
873
874
    asm_thumb_b_label(emit->as, label);
#endif
    emit_post(emit);
}

875
static void emit_native_pop_jump_pre_helper(emit_t *emit, int label) {
876
877
878
879
880
881
882
883
884
885
    vtype_kind_t vtype = peek_vtype(emit);
    if (vtype == VTYPE_BOOL) {
        emit_pre_pop_reg(emit, &vtype, REG_RET);
    } else if (vtype == VTYPE_PYOBJ) {
        emit_pre_pop_reg(emit, &vtype, REG_ARG_1);
        emit_call(emit, RT_F_IS_TRUE, rt_is_true);
    } else {
        printf("ViperTypeError: expecting a bool or pyobj, got %d\n", vtype);
        assert(0);
    }
886
887
888
889
}

static void emit_native_pop_jump_if_false(emit_t *emit, int label) {
    emit_native_pop_jump_pre_helper(emit, label);
890
#if N_X64
891
892
    asm_x64_test_r8_with_r8(emit->as, REG_RET, REG_RET);
    asm_x64_jcc_label(emit->as, JCC_JZ, label);
893
#elif N_THUMB
894
895
    asm_thumb_cmp_rlo_i8(emit->as, REG_RET, 0);
    asm_thumb_bcc_label(emit->as, THUMB_CC_EQ, label);
896
897
898
899
900
#endif
    emit_post(emit);
}

static void emit_native_pop_jump_if_true(emit_t *emit, int label) {
901
902
903
904
905
906
907
908
909
    emit_native_pop_jump_pre_helper(emit, label);
#if N_X64
    asm_x64_test_r8_with_r8(emit->as, REG_RET, REG_RET);
    asm_x64_jcc_label(emit->as, JCC_JNZ, label);
#elif N_THUMB
    asm_thumb_cmp_rlo_i8(emit->as, REG_RET, 0);
    asm_thumb_bcc_label(emit->as, THUMB_CC_NE, label);
#endif
    emit_post(emit);
910
}
911

912
913
914
915
916
917
918
919
920
921
922
923
924
static void emit_native_jump_if_true_or_pop(emit_t *emit, int label) {
    assert(0);
}
static void emit_native_jump_if_false_or_pop(emit_t *emit, int label) {
    assert(0);
}

static void emit_native_setup_loop(emit_t *emit, int label) {
    emit_pre(emit);
    emit_post(emit);
}

static void emit_native_break_loop(emit_t *emit, int label) {
925
    emit_native_jump(emit, label); // TODO properly
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
}
static void emit_native_continue_loop(emit_t *emit, int label) {
    assert(0);
}
static void emit_native_setup_with(emit_t *emit, int label) {
    // not supported, or could be with runtime call
    assert(0);
}
static void emit_native_with_cleanup(emit_t *emit) {
    assert(0);
}
static void emit_native_setup_except(emit_t *emit, int label) {
    assert(0);
}
static void emit_native_setup_finally(emit_t *emit, int label) {
    assert(0);
}
static void emit_native_end_finally(emit_t *emit) {
    assert(0);
}
946

947
948
949
static void emit_native_get_iter(emit_t *emit) {
    // perhaps the difficult one, as we want to rewrite for loops using native code
    // in cases where we iterate over a Python object, can we use normal runtime calls?
950
951
952
953
954
955
956
957

    vtype_kind_t vtype;
    emit_pre_pop_reg(emit, &vtype, REG_ARG_1);
    assert(vtype == VTYPE_PYOBJ);
    emit_call(emit, RT_F_GETITER, rt_getiter);
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}

958
static void emit_native_for_iter(emit_t *emit, int label) {
959
960
961
962
963
    emit_pre(emit);
    vtype_kind_t vtype;
    emit_access_stack(emit, 1, &vtype, REG_ARG_1);
    assert(vtype == VTYPE_PYOBJ);
    emit_call(emit, RT_F_ITERNEXT, rt_iternext);
964
    ASM_MOV_IMM_TO_REG((machine_uint_t)mp_const_stop_iteration, REG_TEMP1);
965
966
967
968
969
#if N_X64
    asm_x64_cmp_r64_with_r64(emit->as, REG_RET, REG_TEMP1);
    asm_x64_jcc_label(emit->as, JCC_JE, label);
#elif N_THUMB
    asm_thumb_cmp_reg_reg(emit->as, REG_RET, REG_TEMP1);
Damien's avatar
Damien committed
970
    asm_thumb_bcc_label(emit->as, THUMB_CC_EQ, label);
971
972
#endif
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
973
}
974

975
static void emit_native_for_iter_end(emit_t *emit) {
976
977
978
979
    // adjust stack counter (we get here from for_iter ending, which popped the value for us)
    emit_pre(emit);
    adjust_stack(emit, -1);
    emit_post(emit);
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
}

static void emit_native_pop_block(emit_t *emit) {
    emit_pre(emit);
    emit_post(emit);
}

static void emit_native_pop_except(emit_t *emit) {
    assert(0);
}

static void emit_native_unary_op(emit_t *emit, rt_unary_op_t op) {
    vtype_kind_t vtype;
    emit_pre_pop_reg(emit, &vtype, REG_ARG_2);
    assert(vtype == VTYPE_PYOBJ);
    emit_call_with_imm_arg(emit, RT_F_UNARY_OP, rt_unary_op, op, REG_ARG_1);
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}

static void emit_native_binary_op(emit_t *emit, rt_binary_op_t op) {
    vtype_kind_t vtype_lhs, vtype_rhs;
For faster browsing, not all history is shown. View entire blame