emitnative.c 53 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
/*
 * This file is part of the Micro Python project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013, 2014 Damien P. George
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
// 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

xbe's avatar
xbe committed
45
#include <stdbool.h>
46
47
48
49
50
51
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>

#include "misc.h"
52
#include "mpconfig.h"
53
#include "qstr.h"
54
55
#include "lexer.h"
#include "parse.h"
56
57
#include "obj.h"
#include "emitglue.h"
58
#include "scope.h"
59
#include "runtime0.h"
60
#include "emit.h"
61
#include "runtime.h"
62

63
64
65
66
67
68
69
#if 0 // print debugging info
#define DEBUG_PRINT (1)
#define DEBUG_printf DEBUG_printf
#else // don't print debugging info
#define DEBUG_printf(...) (void)0
#endif

70
// wrapper around everything in this file
71
#if (MICROPY_EMIT_X64 && N_X64) || (MICROPY_EMIT_THUMB && N_THUMB)
72

73
#if N_X64
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88

// 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))
89
#define ASM_MOV_ALIGNED_IMM_TO_REG(imm, reg) asm_x64_mov_i64_to_r64_aligned(emit->as, (imm), (reg))
90
#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)
91
92
93
94
#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))

95
#elif N_THUMB
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112

// 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))
113
#define ASM_MOV_ALIGNED_IMM_TO_REG(imm, reg) asm_thumb_mov_reg_i32_aligned(emit->as, (reg), (imm))
114
#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)
115
116
117
118
119
120
121
#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 {
122
123
124
125
    STACK_VALUE,
    STACK_REG,
    STACK_IMM,
} stack_info_kind_t;
126
127
128
129
130
131
132
133
134
135
136

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

137
138
139
140
141
142
143
144
145
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;

146
147
148
149
struct _emit_t {
    int pass;

    bool do_viper_types;
150

151
    uint local_vtype_alloc;
152
    vtype_kind_t *local_vtype;
153

154
    uint stack_info_alloc;
155
156
    stack_info_t *stack_info;

157
158
159
160
161
162
163
    int stack_start;
    int stack_size;

    bool last_emit_was_return_value;

    scope_t *scope;

164
#if N_X64
165
    asm_x64_t *as;
166
#elif N_THUMB
167
168
169
170
171
    asm_thumb_t *as;
#endif
};

emit_t *EXPORT_FUN(new)(uint max_num_labels) {
172
    emit_t *emit = m_new0(emit_t, 1);
173
#if N_X64
174
    emit->as = asm_x64_new(max_num_labels);
175
#elif N_THUMB
176
177
178
179
180
    emit->as = asm_thumb_new(max_num_labels);
#endif
    return emit;
}

181
void EXPORT_FUN(free)(emit_t *emit) {
182
183
184
185
186
#if N_X64
    asm_x64_free(emit->as, false);
#elif N_THUMB
    asm_thumb_free(emit->as, false);
#endif
187
188
    m_del(vtype_kind_t, emit->local_vtype, emit->local_vtype_alloc);
    m_del(stack_info_t, emit->stack_info, emit->stack_info_alloc);
189
190
191
    m_del_obj(emit_t, emit);
}

192
STATIC void emit_native_set_viper_types(emit_t *emit, bool do_viper_types) {
193
194
195
    emit->do_viper_types = do_viper_types;
}

196
STATIC void emit_native_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scope) {
197
198
199
200
201
202
    emit->pass = pass;
    emit->stack_start = 0;
    emit->stack_size = 0;
    emit->last_emit_was_return_value = false;
    emit->scope = scope;

203
204
205
206
    // allocate memory for keeping track of the types of locals
    if (emit->local_vtype_alloc < scope->num_locals) {
        emit->local_vtype = m_renew(vtype_kind_t, emit->local_vtype, emit->local_vtype_alloc, scope->num_locals);
        emit->local_vtype_alloc = scope->num_locals;
207
    }
208
209
210

    // allocate memory for keeping track of the objects on the stack
    // XXX don't know stack size on entry, and it should be maximum over all scopes
211
    if (emit->stack_info == NULL) {
212
        emit->stack_info_alloc = scope->stack_size + 50;
213
        emit->stack_info = m_new(stack_info_t, emit->stack_info_alloc);
214
215
216
217
    }

    if (emit->do_viper_types) {
        // TODO set types of arguments based on type signature
218
219
220
221
222
223
224
        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;
        }
225
    } else {
226
227
228
229
230
231
        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;
232
233
234
        }
    }

235
#if N_X64
236
    asm_x64_start_pass(emit->as, pass == MP_PASS_EMIT ? ASM_X64_PASS_EMIT : ASM_X64_PASS_COMPUTE);
237
#elif N_THUMB
238
    asm_thumb_start_pass(emit->as, pass == MP_PASS_EMIT ? ASM_THUMB_PASS_EMIT : ASM_THUMB_PASS_COMPUTE);
239
240
241
242
#endif

    // entry to function
    int num_locals = 0;
243
    if (pass > MP_PASS_SCOPE) {
244
245
246
247
248
249
250
        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;
    }
251
#if N_X64
252
    asm_x64_entry(emit->as, num_locals);
253
#elif N_THUMB
254
255
256
257
    asm_thumb_entry(emit->as, num_locals);
#endif

    // initialise locals from parameters
258
#if N_X64
259
    for (int i = 0; i < scope->num_pos_args; i++) {
260
261
262
        if (i == 0) {
            asm_x64_mov_r64_to_r64(emit->as, REG_ARG_1, REG_LOCAL_1);
        } else if (i == 1) {
263
            asm_x64_mov_r64_to_local(emit->as, REG_ARG_2, i - REG_LOCAL_NUM);
264
        } else if (i == 2) {
265
            asm_x64_mov_r64_to_local(emit->as, REG_ARG_3, i - REG_LOCAL_NUM);
266
267
268
269
270
        } else {
            // TODO not implemented
            assert(0);
        }
    }
271
#elif N_THUMB
272
    for (int i = 0; i < scope->num_pos_args; i++) {
273
274
275
276
277
278
279
280
281
282
283
284
285
286
        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);
        }
    }

Damien George's avatar
Damien George committed
287
    asm_thumb_mov_reg_i32(emit->as, REG_R7, (machine_uint_t)mp_fun_table);
288
289
290
#endif
}

291
STATIC void emit_native_end_pass(emit_t *emit) {
292
#if N_X64
293
294
295
296
    if (!emit->last_emit_was_return_value) {
        asm_x64_exit(emit->as);
    }
    asm_x64_end_pass(emit->as);
297
#elif N_THUMB
298
299
300
301
302
303
304
305
306
307
308
    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);
    }

309
    if (emit->pass == MP_PASS_EMIT) {
310
#if N_X64
311
        void *f = asm_x64_get_code(emit->as);
312
        mp_emit_glue_assign_native(emit->scope->raw_code, emit->do_viper_types ? MP_CODE_NATIVE_VIPER : MP_CODE_NATIVE_PY, f, asm_x64_get_code_size(emit->as), emit->scope->num_pos_args);
313
#elif N_THUMB
314
        void *f = asm_thumb_get_code(emit->as);
315
        mp_emit_glue_assign_native(emit->scope->raw_code, emit->do_viper_types ? MP_CODE_NATIVE_VIPER : MP_CODE_NATIVE_PY, f, asm_thumb_get_code_size(emit->as), emit->scope->num_pos_args);
316
317
318
319
#endif
    }
}

320
STATIC bool emit_native_last_emit_was_return_value(emit_t *emit) {
321
322
323
    return emit->last_emit_was_return_value;
}

324
325
STATIC void emit_native_adjust_stack_size(emit_t *emit, int delta) {
    emit->stack_size += delta;
326
327
}

328
STATIC void emit_native_set_source_line(emit_t *emit, int source_line) {
329
330
}

331
STATIC void adjust_stack(emit_t *emit, int stack_size_delta) {
332
    DEBUG_printf("adjust stack: stack:%d + delta:%d\n", emit->stack_size, stack_size_delta);
333
    assert((int)emit->stack_size + stack_size_delta >= 0);
334
    emit->stack_size += stack_size_delta;
335
    if (emit->pass > MP_PASS_SCOPE && emit->stack_size > emit->scope->stack_size) {
336
337
338
339
        emit->scope->stack_size = emit->stack_size;
    }
}

340
/*
341
STATIC void emit_pre_raw(emit_t *emit, int stack_size_delta) {
342
343
344
    adjust_stack(emit, stack_size_delta);
    emit->last_emit_was_return_value = false;
}
345
*/
346

347
// this must be called at start of emit functions
348
STATIC void emit_native_pre(emit_t *emit) {
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
    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;
            }
        }
    }
    */
372
373
}

374
STATIC vtype_kind_t peek_vtype(emit_t *emit) {
375
376
    return emit->stack_info[emit->stack_size - 1].vtype;
}
377

378
379
// pos=1 is TOS, pos=2 is next, etc
// use pos=0 for no skipping
380
STATIC void need_reg_single(emit_t *emit, int reg_needed, int skip_stack_pos) {
381
382
383
384
385
386
387
388
389
390
391
392
    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);
            }
        }
    }
}

393
STATIC void need_reg_all(emit_t *emit) {
394
395
    for (int i = 0; i < emit->stack_size; i++) {
        stack_info_t *si = &emit->stack_info[i];
396
        if (si->kind == STACK_REG) {
397
398
399
400
401
            si->kind = STACK_VALUE;
            ASM_MOV_REG_TO_LOCAL(si->u_reg, emit->stack_start + i);
        }
    }
}
402

403
STATIC void need_stack_settled(emit_t *emit) {
404
405
406
407
408
409
    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);
        }
410
    }
411
412
413
414
415
416
    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);
        }
    }
417
418
}

419
// pos=1 is TOS, pos=2 is next, etc
420
STATIC void emit_access_stack(emit_t *emit, int pos, vtype_kind_t *vtype, int reg_dest) {
421
422
    need_reg_single(emit, reg_dest, pos);
    stack_info_t *si = &emit->stack_info[emit->stack_size - pos];
423
424
425
    *vtype = si->vtype;
    switch (si->kind) {
        case STACK_VALUE:
426
            ASM_MOV_LOCAL_TO_REG(emit->stack_start + emit->stack_size - pos, reg_dest);
427
428
            break;

429
430
431
        case STACK_REG:
            if (si->u_reg != reg_dest) {
                ASM_MOV_REG_TO_REG(si->u_reg, reg_dest);
432
433
434
            }
            break;

435
436
        case STACK_IMM:
            ASM_MOV_IMM_TO_REG(si->u_imm, reg_dest);
437
438
439
440
            break;
    }
}

441
442
443
444
445
STATIC void emit_pre_pop_discard(emit_t *emit, vtype_kind_t *vtype) {
    emit->last_emit_was_return_value = false;
    adjust_stack(emit, -1);
}

446
STATIC void emit_pre_pop_reg(emit_t *emit, vtype_kind_t *vtype, int reg_dest) {
447
448
449
450
451
    emit->last_emit_was_return_value = false;
    emit_access_stack(emit, 1, vtype, reg_dest);
    adjust_stack(emit, -1);
}

452
STATIC void emit_pre_pop_reg_reg(emit_t *emit, vtype_kind_t *vtypea, int rega, vtype_kind_t *vtypeb, int regb) {
453
    emit_pre_pop_reg(emit, vtypea, rega);
454
    emit_pre_pop_reg(emit, vtypeb, regb);
455
456
}

457
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) {
458
    emit_pre_pop_reg(emit, vtypea, rega);
459
460
    emit_pre_pop_reg(emit, vtypeb, regb);
    emit_pre_pop_reg(emit, vtypec, regc);
461
462
}

463
STATIC void emit_post(emit_t *emit) {
464
465
}

466
STATIC void emit_post_push_reg(emit_t *emit, vtype_kind_t vtype, int reg) {
467
468
469
470
471
    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);
472
473
}

474
STATIC void emit_post_push_imm(emit_t *emit, vtype_kind_t vtype, machine_int_t imm) {
475
476
477
478
479
    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);
480
481
}

482
STATIC void emit_post_push_reg_reg(emit_t *emit, vtype_kind_t vtypea, int rega, vtype_kind_t vtypeb, int regb) {
483
484
    emit_post_push_reg(emit, vtypea, rega);
    emit_post_push_reg(emit, vtypeb, regb);
485
486
}

487
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) {
488
489
490
    emit_post_push_reg(emit, vtypea, rega);
    emit_post_push_reg(emit, vtypeb, regb);
    emit_post_push_reg(emit, vtypec, regc);
491
492
}

493
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) {
494
495
496
497
    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);
498
499
500
}

// vtype of all n_pop objects is VTYPE_PYOBJ
501
// does not use any temporary registers (but may use reg_dest before loading it with stack pointer)
502
// TODO this needs some thinking for viper code
503
STATIC void emit_get_stack_pointer_to_reg_for_pop(emit_t *emit, int reg_dest, int n_pop) {
504
    need_reg_all(emit);
505
    for (int i = 0; i < n_pop; i++) {
506
507
        stack_info_t *si = &emit->stack_info[emit->stack_size - 1 - i];
        // must push any imm's to stack
508
        // must convert them to VTYPE_PYOBJ for viper code
509
510
        if (si->kind == STACK_IMM) {
            si->kind = STACK_VALUE;
511
512
513
514
515
516
517
            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) {
518
                        ASM_MOV_IMM_TO_LOCAL_USING((machine_uint_t)mp_const_false, emit->stack_start + emit->stack_size - 1 - i, reg_dest);
519
                    } else {
520
                        ASM_MOV_IMM_TO_LOCAL_USING((machine_uint_t)mp_const_true, emit->stack_start + emit->stack_size - 1 - i, reg_dest);
521
522
523
524
525
526
527
528
529
530
                    }
                    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);
            }
531
532
533
        }
        assert(si->kind == STACK_VALUE);
        assert(si->vtype == VTYPE_PYOBJ);
534
    }
535
    adjust_stack(emit, -n_pop);
536
    ASM_MOV_LOCAL_ADDR_TO_REG(emit->stack_start + emit->stack_size, reg_dest);
537
538
539
}

// vtype of all n_push objects is VTYPE_PYOBJ
540
STATIC void emit_get_stack_pointer_to_reg_for_push(emit_t *emit, int reg_dest, int n_push) {
541
    need_reg_all(emit);
542
    for (int i = 0; i < n_push; i++) {
543
        emit->stack_info[emit->stack_size + i].kind = STACK_VALUE;
544
        emit->stack_info[emit->stack_size + i].vtype = VTYPE_PYOBJ;
545
    }
546
    ASM_MOV_LOCAL_ADDR_TO_REG(emit->stack_start + emit->stack_size, reg_dest);
547
548
549
    adjust_stack(emit, n_push);
}

Damien George's avatar
Damien George committed
550
STATIC void emit_call(emit_t *emit, mp_fun_kind_t fun_kind, void *fun) {
551
    need_reg_all(emit);
552
#if N_X64
553
    asm_x64_call_ind(emit->as, fun, REG_RAX);
554
#elif N_THUMB
Damien George's avatar
Damien George committed
555
    asm_thumb_bl_ind(emit->as, mp_fun_table[fun_kind], fun_kind, REG_R3);
556
557
558
#endif
}

Damien George's avatar
Damien George committed
559
STATIC void emit_call_with_imm_arg(emit_t *emit, mp_fun_kind_t fun_kind, void *fun, machine_int_t arg_val, int arg_reg) {
560
    need_reg_all(emit);
561
    ASM_MOV_IMM_TO_REG(arg_val, arg_reg);
562
563
564
#if N_X64
    asm_x64_call_ind(emit->as, fun, REG_RAX);
#elif N_THUMB
Damien George's avatar
Damien George committed
565
    asm_thumb_bl_ind(emit->as, mp_fun_table[fun_kind], fun_kind, REG_R3);
566
#endif
567
568
}

569
570
571
572
573
574
575
576
577
578
579
// the first arg is stored in the code aligned on a machine_uint_t boundary
STATIC void emit_call_with_imm_arg_aligned(emit_t *emit, mp_fun_kind_t fun_kind, void *fun, machine_int_t arg_val, int arg_reg) {
    need_reg_all(emit);
    ASM_MOV_ALIGNED_IMM_TO_REG(arg_val, arg_reg);
#if N_X64
    asm_x64_call_ind(emit->as, fun, REG_RAX);
#elif N_THUMB
    asm_thumb_bl_ind(emit->as, mp_fun_table[fun_kind], fun_kind, REG_R3);
#endif
}

Damien George's avatar
Damien George committed
580
STATIC void emit_call_with_2_imm_args(emit_t *emit, mp_fun_kind_t fun_kind, void *fun, machine_int_t arg_val1, int arg_reg1, machine_int_t arg_val2, int arg_reg2) {
581
582
583
584
585
586
    need_reg_all(emit);
    ASM_MOV_IMM_TO_REG(arg_val1, arg_reg1);
    ASM_MOV_IMM_TO_REG(arg_val2, arg_reg2);
#if N_X64
    asm_x64_call_ind(emit->as, fun, REG_RAX);
#elif N_THUMB
Damien George's avatar
Damien George committed
587
    asm_thumb_bl_ind(emit->as, mp_fun_table[fun_kind], fun_kind, REG_R3);
588
589
590
#endif
}

591
592
// the first arg is stored in the code aligned on a machine_uint_t boundary
STATIC void emit_call_with_3_imm_args_and_first_aligned(emit_t *emit, mp_fun_kind_t fun_kind, void *fun, machine_int_t arg_val1, int arg_reg1, machine_int_t arg_val2, int arg_reg2, machine_int_t arg_val3, int arg_reg3) {
593
    need_reg_all(emit);
594
    ASM_MOV_ALIGNED_IMM_TO_REG(arg_val1, arg_reg1);
595
596
597
598
599
600
601
602
603
    ASM_MOV_IMM_TO_REG(arg_val2, arg_reg2);
    ASM_MOV_IMM_TO_REG(arg_val3, arg_reg3);
#if N_X64
    asm_x64_call_ind(emit->as, fun, REG_RAX);
#elif N_THUMB
    asm_thumb_bl_ind(emit->as, mp_fun_table[fun_kind], fun_kind, REG_R3);
#endif
}

604
STATIC void emit_native_load_id(emit_t *emit, qstr qstr) {
605
606
    // check for built-ins
    if (strcmp(qstr_str(qstr), "v_int") == 0) {
607
        assert(0);
608
        emit_native_pre(emit);
609
610
611
612
613
614
615
616
        //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);
    }
}

617
STATIC void emit_native_store_id(emit_t *emit, qstr qstr) {
618
619
620
621
    // TODO check for built-ins and disallow
    emit_common_store_id(emit, &EXPORT_FUN(method_table), emit->scope, qstr);
}

622
STATIC void emit_native_delete_id(emit_t *emit, qstr qstr) {
623
624
625
626
    // TODO check for built-ins and disallow
    emit_common_delete_id(emit, &EXPORT_FUN(method_table), emit->scope, qstr);
}

627
STATIC void emit_native_label_assign(emit_t *emit, uint l) {
628
    emit_native_pre(emit);
629
630
    // need to commit stack because we can jump here from elsewhere
    need_stack_settled(emit);
631
#if N_X64
632
    asm_x64_label_assign(emit->as, l);
633
#elif N_THUMB
634
635
    asm_thumb_label_assign(emit->as, l);
#endif
636
    emit_post(emit);
637
638
}

639
640
641
642
643
644
645
646
647
STATIC void emit_native_import_name(emit_t *emit, qstr qst) {
    DEBUG_printf("import_name %s\n", qstr_str(qst));
    vtype_kind_t vtype_fromlist;
    vtype_kind_t vtype_level;
    emit_pre_pop_reg_reg(emit, &vtype_fromlist, REG_ARG_2, &vtype_level, REG_ARG_3); // arg2 = fromlist, arg3 = level
    assert(vtype_fromlist == VTYPE_PYOBJ);
    assert(vtype_level == VTYPE_PYOBJ);
    emit_call_with_imm_arg(emit, MP_F_IMPORT_NAME, mp_import_name, qst, REG_ARG_1); // arg1 = import name
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
648
649
}

650
651
652
653
654
655
656
657
STATIC void emit_native_import_from(emit_t *emit, qstr qst) {
    DEBUG_printf("import_from %s\n", qstr_str(qst));
    emit_native_pre(emit);
    vtype_kind_t vtype_module;
    emit_access_stack(emit, 1, &vtype_module, REG_ARG_1); // arg1 = module
    assert(vtype_module == VTYPE_PYOBJ);
    emit_call_with_imm_arg(emit, MP_F_IMPORT_FROM, mp_import_from, qst, REG_ARG_2); // arg2 = import name
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
658
659
}

660
STATIC void emit_native_import_star(emit_t *emit) {
661
662
663
664
665
666
    DEBUG_printf("import_star\n");
    vtype_kind_t vtype_module;
    emit_pre_pop_reg(emit, &vtype_module, REG_ARG_1); // arg1 = module
    assert(vtype_module == VTYPE_PYOBJ);
    emit_call(emit, MP_F_IMPORT_ALL, mp_import_all);
    emit_post(emit);
667
668
}

669
STATIC void emit_native_load_const_tok(emit_t *emit, mp_token_kind_t tok) {
670
    DEBUG_printf("load_const_tok %d\n", tok);
671
    emit_native_pre(emit);
672
673
674
675
    int vtype;
    machine_uint_t val;
    if (emit->do_viper_types) {
        switch (tok) {
676
677
678
            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;
679
680
681
682
683
            default: assert(0); vtype = 0; val = 0; // shouldn't happen
        }
    } else {
        vtype = VTYPE_PYOBJ;
        switch (tok) {
684
685
686
            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;
687
688
689
690
691
692
            default: assert(0); vtype = 0; val = 0; // shouldn't happen
        }
    }
    emit_post_push_imm(emit, vtype, val);
}

693
STATIC void emit_native_load_const_small_int(emit_t *emit, machine_int_t arg) {
694
    DEBUG_printf("load_const_small_int %d\n", arg);
695
    emit_native_pre(emit);
696
697
698
699
700
701
702
    if (emit->do_viper_types) {
        emit_post_push_imm(emit, VTYPE_INT, arg);
    } else {
        emit_post_push_imm(emit, VTYPE_PYOBJ, (arg << 1) | 1);
    }
}

703
704
705
706
STATIC void emit_native_load_const_int(emit_t *emit, qstr qst) {
    DEBUG_printf("load_const_int %s\n", qstr_str(st));
    // for viper: load integer, check fits in 32 bits
    emit_native_pre(emit);
707
    emit_call_with_imm_arg(emit, MP_F_LOAD_CONST_INT, mp_load_const_int, qst, REG_ARG_1);
708
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
709
710
}

711
STATIC void emit_native_load_const_dec(emit_t *emit, qstr qstr) {
712
    // for viper, a float/complex is just a Python object
713
    emit_native_pre(emit);
Damien George's avatar
Damien George committed
714
    emit_call_with_imm_arg(emit, MP_F_LOAD_CONST_DEC, mp_load_const_dec, qstr, REG_ARG_1);
715
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
716
717
}

718
STATIC void emit_native_load_const_str(emit_t *emit, qstr qstr, bool bytes) {
719
    emit_native_pre(emit);
720
721
722
723
724
725
    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 {
Damien George's avatar
Damien George committed
726
        emit_call_with_imm_arg(emit, MP_F_LOAD_CONST_STR, mp_load_const_str, qstr, REG_ARG_1);
727
728
729
730
        emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
    }
}

731
732
733
734
735
STATIC void emit_native_load_null(emit_t *emit) {
    emit_native_pre(emit);
    emit_post_push_imm(emit, VTYPE_PYOBJ, 0);
}

736
STATIC void emit_native_load_fast(emit_t *emit, qstr qstr, uint id_flags, int local_num) {
737
738
739
740
    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));
    }
741
    emit_native_pre(emit);
742
#if N_X64
743
744
745
    if (local_num == 0) {
        emit_post_push_reg(emit, vtype, REG_LOCAL_1);
    } else {
746
        need_reg_single(emit, REG_RAX, 0);
747
        asm_x64_mov_local_to_r64(emit->as, local_num - REG_LOCAL_NUM, REG_RAX);
748
749
        emit_post_push_reg(emit, vtype, REG_RAX);
    }
750
#elif N_THUMB
751
752
753
754
755
756
757
    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 {
758
        need_reg_single(emit, REG_R0, 0);
759
        asm_thumb_mov_reg_local(emit->as, REG_R0, local_num - REG_LOCAL_NUM);
760
761
762
763
764
        emit_post_push_reg(emit, vtype, REG_R0);
    }
#endif
}

765
STATIC void emit_native_load_deref(emit_t *emit, qstr qstr, int local_num) {
Damien's avatar
Damien committed
766
767
768
769
770
    // not implemented
    // in principle could support this quite easily (ldr r0, [r0, #0]) and then get closed over variables!
    assert(0);
}

771
STATIC void emit_native_load_name(emit_t *emit, qstr qstr) {
772
    emit_native_pre(emit);
Damien George's avatar
Damien George committed
773
    emit_call_with_imm_arg(emit, MP_F_LOAD_NAME, mp_load_name, qstr, REG_ARG_1);
774
775
776
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}

777
STATIC void emit_native_load_global(emit_t *emit, qstr qstr) {
778
    emit_native_pre(emit);
Damien George's avatar
Damien George committed
779
    emit_call_with_imm_arg(emit, MP_F_LOAD_GLOBAL, mp_load_global, qstr, REG_ARG_1);
780
781
782
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}

783
STATIC void emit_native_load_attr(emit_t *emit, qstr qstr) {
784
785
786
    // depends on type of subject:
    //  - integer, function, pointer to integers: error
    //  - pointer to structure: get member, quite easy
Damien George's avatar
Damien George committed
787
    //  - Python object: call mp_load_attr, and needs to be typed to convert result
788
789
790
    vtype_kind_t vtype_base;
    emit_pre_pop_reg(emit, &vtype_base, REG_ARG_1); // arg1 = base
    assert(vtype_base == VTYPE_PYOBJ);
Damien George's avatar
Damien George committed
791
    emit_call_with_imm_arg(emit, MP_F_LOAD_ATTR, mp_load_attr, qstr, REG_ARG_2); // arg2 = attribute name
792
793
794
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
}

795
STATIC void emit_native_load_method(emit_t *emit, qstr qstr) {
796
797
798
799
    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
Damien George's avatar
Damien George committed
800
    emit_call_with_imm_arg(emit, MP_F_LOAD_METHOD, mp_load_method, qstr, REG_ARG_2); // arg2 = method name
801
802
}

803
STATIC void emit_native_load_build_class(emit_t *emit) {
804
    emit_native_pre(emit);
Damien George's avatar
Damien George committed
805
    emit_call(emit, MP_F_LOAD_BUILD_CLASS, mp_load_build_class);
806
    emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
807
808
}

809
810
811
812
813
814
815
816
817
818
819
820
STATIC void emit_native_load_subscr(emit_t *emit) {
    vtype_kind_t vtype_lhs, vtype_rhs;
    emit_pre_pop_reg_reg(emit, &vtype_rhs, REG_ARG_2, &vtype_lhs, REG_ARG_1);
    if (vtype_lhs == VTYPE_PYOBJ && vtype_rhs == VTYPE_PYOBJ) {
        emit_call_with_imm_arg(emit, MP_F_OBJ_SUBSCR, mp_obj_subscr, (machine_uint_t)MP_OBJ_SENTINEL, REG_ARG_3);
        emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
    } else {
        printf("ViperTypeError: can't do subscr of types %d and %d\n", vtype_lhs, vtype_rhs);
        assert(0);
    }
}

821
STATIC void emit_native_store_fast(emit_t *emit, qstr qstr, int local_num) {
822
    vtype_kind_t vtype;
823
#if N_X64
824
825
826
827
    if (local_num == 0) {
        emit_pre_pop_reg(emit, &vtype, REG_LOCAL_1);
    } else {
        emit_pre_pop_reg(emit, &vtype, REG_RAX);
828
        asm_x64_mov_r64_to_local(emit->as, REG_RAX, local_num - REG_LOCAL_NUM);
829
    }
830
#elif N_THUMB
831
832
833
834
835
836
837
838
    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);
839
        asm_thumb_mov_local_reg(emit->as, local_num - REG_LOCAL_NUM, REG_R0);
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
    }
#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);
    }
}

855
STATIC void emit_native_store_deref(emit_t *emit, qstr qstr, int local_num) {
Damien's avatar
Damien committed
856
857
858
859
    // not implemented
    assert(0);
}

860
STATIC void emit_native_store_name(emit_t *emit, qstr qstr) {
Damien George's avatar
Damien George committed
861
    // mp_store_name, but needs conversion of object (maybe have mp_viper_store_name(obj, type))
862
863
864
    vtype_kind_t vtype;
    emit_pre_pop_reg(emit, &vtype, REG_ARG_2);
    assert(vtype == VTYPE_PYOBJ);
Damien George's avatar
Damien George committed
865
    emit_call_with_imm_arg(emit, MP_F_STORE_NAME, mp_store_name, qstr, REG_ARG_1); // arg1 = name
866
867
868
    emit_post(emit);
}

869
STATIC void emit_native_store_global(emit_t *emit, qstr qstr) {
870
871
872
873
    // not implemented
    assert(0);
}

874
STATIC void emit_native_store_attr(emit_t *emit, qstr qstr) {
875
876
877
878
    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);
Damien George's avatar
Damien George committed
879
    emit_call_with_imm_arg(emit, MP_F_STORE_ATTR, mp_store_attr, qstr, REG_ARG_2); // arg2 = attribute name
880
    emit_post(emit);
881
882
}

883
STATIC void emit_native_store_subscr(emit_t *emit) {
884
885
886
887
888
889
890
891
892
    // 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);
893
    emit_call(emit, MP_F_OBJ_SUBSCR, mp_obj_subscr);
894
895
}

896
STATIC void emit_native_delete_fast(emit_t *emit, qstr qstr, int local_num) {
897
898
899
900
901
    // not implemented
    // could support for Python types, just set to None (so GC can reclaim it)
    assert(0);
}

902
STATIC void emit_native_delete_deref(emit_t *emit, qstr qstr, int local_num) {
Damien's avatar
Damien committed
903
904
905
906
    // not supported
    assert(0);
}

907
STATIC void emit_native_delete_name(emit_t *emit, qstr qstr) {
908
    // not implemented
Damien George's avatar
Damien George committed
909
    // use mp_delete_name
910
911
912
    assert(0);
}

913
STATIC void emit_native_delete_global(emit_t *emit, qstr qstr) {
914
    // not implemented
Damien George's avatar
Damien George committed
915
    // use mp_delete_global
916
917
918
    assert(0);
}

919
STATIC void emit_native_delete_attr(emit_t *emit, qstr qstr) {
920
921
922
923
    // not supported
    assert(0);
}

924
STATIC void emit_native_delete_subscr(emit_t *emit) {
925
926
927
928
929
    vtype_kind_t vtype_index, vtype_base;
    emit_pre_pop_reg_reg(emit, &vtype_index, REG_ARG_2, &vtype_base, REG_ARG_1); // index, base
    assert(vtype_index == VTYPE_PYOBJ);
    assert(vtype_base == VTYPE_PYOBJ);
    emit_call_with_imm_arg(emit, MP_F_OBJ_SUBSCR, mp_obj_subscr, (machine_uint_t)MP_OBJ_NULL, REG_ARG_3);
930
931
}

932
STATIC void emit_native_dup_top(emit_t *emit) {
933
934
935
936
937
    vtype_kind_t vtype;
    emit_pre_pop_reg(emit, &vtype, REG_TEMP0);
    emit_post_push_reg_reg(emit, vtype, REG_TEMP0, vtype, REG_TEMP0);
}

938
STATIC void emit_native_dup_top_two(emit_t *emit) {
939
940
941
942
943
    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);
}

944
STATIC void emit_native_pop_top(emit_t *emit) {
945
    vtype_kind_t vtype;
946
    emit_pre_pop_discard(emit, &vtype);
947
948
949
    emit_post(emit);
}

950
STATIC void emit_native_rot_two(emit_t *emit) {
951
952
953
    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);
954
955
}

956
STATIC void emit_native_rot_three(emit_t *emit) {
957
958
959
960
961
    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);
}

962
STATIC void emit_native_jump(emit_t *emit, uint label) {
963
    emit_native_pre(emit);
964
965
    // need to commit stack because we are jumping elsewhere
    need_stack_settled(emit);
966
#if N_X64
967
    asm_x64_jmp_label(emit->as, label);
968
#elif N_THUMB
969
970
971
972
973
    asm_thumb_b_label(emit->as, label);
#endif
    emit_post(emit);
}

974
STATIC void emit_native_jump_helper(emit_t *emit, uint label, bool pop) {
975
976
977
    vtype_kind_t vtype = peek_vtype(emit);
    if (vtype == VTYPE_BOOL) {
        emit_pre_pop_reg(emit, &vtype, REG_RET);
978
979
980
        if (!pop) {
            adjust_stack(emit, 1);
        }
981
982
    } else if (vtype == VTYPE_PYOBJ) {
        emit_pre_pop_reg(emit, &vtype, REG_ARG_1);
Damien George's avatar
Damien George committed
983
        emit_call(emit, MP_F_OBJ_IS_TRUE, mp_obj_is_true);
984
985
986
        if (!pop) {
            emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
        }
987
988
989
990
    } else {
        printf("ViperTypeError: expecting a bool or pyobj, got %d\n", vtype);
        assert(0);
    }
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
    // need to commit stack because we may jump elsewhere
    need_stack_settled(emit);
}

STATIC void emit_native_pop_jump_if_true(emit_t *emit, uint label) {
    emit_native_jump_helper(emit, label, true);
#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);
1005
1006
}

1007
STATIC void emit_native_pop_jump_if_false(emit_t *emit, uint label) {
1008
    emit_native_jump_helper(emit, label, true);
1009
#if N_X64
1010
1011
    asm_x64_test_r8_with_r8(emit->as, REG_RET, REG_RET);
    asm_x64_jcc_label(emit->as, JCC_JZ, label);
1012
#elif N_THUMB
1013
1014
    asm_thumb_cmp_rlo_i8(emit->as, REG_RET, 0);
    asm_thumb_bcc_label(emit->as, THUMB_CC_EQ, label);
1015
1016
1017
1018
#endif
    emit_post(emit);
}

1019
1020
STATIC void emit_native_jump_if_true_or_pop(emit_t *emit, uint label) {
    emit_native_jump_helper(emit, label, false);