1 /*
2 * Stack-less Just-In-Time compiler
3 *
4 * Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without modification, are
7 * permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice, this list of
10 * conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
13 * of conditions and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
21 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #ifdef __SOFTFP__
28 #define ARM_ABI_INFO " ABI:softfp"
29 #else
30 #define ARM_ABI_INFO " ABI:hardfp"
31 #endif
32
sljit_get_platform_name(void)33 SLJIT_API_FUNC_ATTRIBUTE const char* sljit_get_platform_name(void)
34 {
35 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
36 return "ARMv7" SLJIT_CPUINFO ARM_ABI_INFO;
37 #elif (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
38 return "ARMv5" SLJIT_CPUINFO ARM_ABI_INFO;
39 #else
40 #error "Internal error: Unknown ARM architecture"
41 #endif
42 }
43
44 /* Last register + 1. */
45 #define TMP_REG1 (SLJIT_NUMBER_OF_REGISTERS + 2)
46 #define TMP_REG2 (SLJIT_NUMBER_OF_REGISTERS + 3)
47 #define TMP_PC (SLJIT_NUMBER_OF_REGISTERS + 4)
48
49 #define TMP_FREG1 (SLJIT_NUMBER_OF_FLOAT_REGISTERS + 1)
50 #define TMP_FREG2 (SLJIT_NUMBER_OF_FLOAT_REGISTERS + 2)
51
52 /* In ARM instruction words.
53 Cache lines are usually 32 byte aligned. */
54 #define CONST_POOL_ALIGNMENT 8
55 #define CONST_POOL_EMPTY 0xffffffff
56
57 #define ALIGN_INSTRUCTION(ptr) \
58 (sljit_uw*)(((sljit_uw)(ptr) + (CONST_POOL_ALIGNMENT * sizeof(sljit_uw)) - 1) & ~((CONST_POOL_ALIGNMENT * sizeof(sljit_uw)) - 1))
59 #define MAX_DIFFERENCE(max_diff) \
60 (((max_diff) / (sljit_s32)sizeof(sljit_uw)) - (CONST_POOL_ALIGNMENT - 1))
61
62 /* See sljit_emit_enter and sljit_emit_op0 if you want to change them. */
63 static const sljit_u8 reg_map[SLJIT_NUMBER_OF_REGISTERS + 5] = {
64 0, 0, 1, 2, 3, 11, 10, 9, 8, 7, 6, 5, 4, 13, 12, 14, 15
65 };
66
67 static const sljit_u8 freg_map[SLJIT_NUMBER_OF_FLOAT_REGISTERS + 3] = {
68 0, 0, 1, 2, 3, 4, 5, 6, 7
69 };
70
71 #define RM(rm) (reg_map[rm])
72 #define RD(rd) (reg_map[rd] << 12)
73 #define RN(rn) (reg_map[rn] << 16)
74
75 /* --------------------------------------------------------------------- */
76 /* Instrucion forms */
77 /* --------------------------------------------------------------------- */
78
79 /* The instruction includes the AL condition.
80 INST_NAME - CONDITIONAL remove this flag. */
81 #define COND_MASK 0xf0000000
82 #define CONDITIONAL 0xe0000000
83 #define PUSH_POOL 0xff000000
84
85 #define ADC 0xe0a00000
86 #define ADD 0xe0800000
87 #define AND 0xe0000000
88 #define B 0xea000000
89 #define BIC 0xe1c00000
90 #define BL 0xeb000000
91 #define BLX 0xe12fff30
92 #define BX 0xe12fff10
93 #define CLZ 0xe16f0f10
94 #define CMN 0xe1600000
95 #define CMP 0xe1400000
96 #define BKPT 0xe1200070
97 #define EOR 0xe0200000
98 #define MOV 0xe1a00000
99 #define MUL 0xe0000090
100 #define MVN 0xe1e00000
101 #define NOP 0xe1a00000
102 #define ORR 0xe1800000
103 #define PUSH 0xe92d0000
104 #define POP 0xe8bd0000
105 #define RSB 0xe0600000
106 #define RSC 0xe0e00000
107 #define SBC 0xe0c00000
108 #define SMULL 0xe0c00090
109 #define SUB 0xe0400000
110 #define UMULL 0xe0800090
111 #define VABS_F32 0xeeb00ac0
112 #define VADD_F32 0xee300a00
113 #define VCMP_F32 0xeeb40a40
114 #define VCVT_F32_S32 0xeeb80ac0
115 #define VCVT_F64_F32 0xeeb70ac0
116 #define VCVT_S32_F32 0xeebd0ac0
117 #define VDIV_F32 0xee800a00
118 #define VMOV_F32 0xeeb00a40
119 #define VMOV 0xee000a10
120 #define VMOV2 0xec400a10
121 #define VMRS 0xeef1fa10
122 #define VMUL_F32 0xee200a00
123 #define VNEG_F32 0xeeb10a40
124 #define VSTR_F32 0xed000a00
125 #define VSUB_F32 0xee300a40
126
127 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
128 /* Arm v7 specific instructions. */
129 #define MOVW 0xe3000000
130 #define MOVT 0xe3400000
131 #define SXTB 0xe6af0070
132 #define SXTH 0xe6bf0070
133 #define UXTB 0xe6ef0070
134 #define UXTH 0xe6ff0070
135 #endif
136
137 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
138
push_cpool(struct sljit_compiler * compiler)139 static sljit_s32 push_cpool(struct sljit_compiler *compiler)
140 {
141 /* Pushing the constant pool into the instruction stream. */
142 sljit_uw* inst;
143 sljit_uw* cpool_ptr;
144 sljit_uw* cpool_end;
145 sljit_s32 i;
146
147 /* The label could point the address after the constant pool. */
148 if (compiler->last_label && compiler->last_label->size == compiler->size)
149 compiler->last_label->size += compiler->cpool_fill + (CONST_POOL_ALIGNMENT - 1) + 1;
150
151 SLJIT_ASSERT(compiler->cpool_fill > 0 && compiler->cpool_fill <= CPOOL_SIZE);
152 inst = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
153 FAIL_IF(!inst);
154 compiler->size++;
155 *inst = 0xff000000 | compiler->cpool_fill;
156
157 for (i = 0; i < CONST_POOL_ALIGNMENT - 1; i++) {
158 inst = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
159 FAIL_IF(!inst);
160 compiler->size++;
161 *inst = 0;
162 }
163
164 cpool_ptr = compiler->cpool;
165 cpool_end = cpool_ptr + compiler->cpool_fill;
166 while (cpool_ptr < cpool_end) {
167 inst = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
168 FAIL_IF(!inst);
169 compiler->size++;
170 *inst = *cpool_ptr++;
171 }
172 compiler->cpool_diff = CONST_POOL_EMPTY;
173 compiler->cpool_fill = 0;
174 return SLJIT_SUCCESS;
175 }
176
push_inst(struct sljit_compiler * compiler,sljit_uw inst)177 static sljit_s32 push_inst(struct sljit_compiler *compiler, sljit_uw inst)
178 {
179 sljit_uw* ptr;
180
181 if (SLJIT_UNLIKELY(compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4092)))
182 FAIL_IF(push_cpool(compiler));
183
184 ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
185 FAIL_IF(!ptr);
186 compiler->size++;
187 *ptr = inst;
188 return SLJIT_SUCCESS;
189 }
190
push_inst_with_literal(struct sljit_compiler * compiler,sljit_uw inst,sljit_uw literal)191 static sljit_s32 push_inst_with_literal(struct sljit_compiler *compiler, sljit_uw inst, sljit_uw literal)
192 {
193 sljit_uw* ptr;
194 sljit_uw cpool_index = CPOOL_SIZE;
195 sljit_uw* cpool_ptr;
196 sljit_uw* cpool_end;
197 sljit_u8* cpool_unique_ptr;
198
199 if (SLJIT_UNLIKELY(compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4092)))
200 FAIL_IF(push_cpool(compiler));
201 else if (compiler->cpool_fill > 0) {
202 cpool_ptr = compiler->cpool;
203 cpool_end = cpool_ptr + compiler->cpool_fill;
204 cpool_unique_ptr = compiler->cpool_unique;
205 do {
206 if ((*cpool_ptr == literal) && !(*cpool_unique_ptr)) {
207 cpool_index = cpool_ptr - compiler->cpool;
208 break;
209 }
210 cpool_ptr++;
211 cpool_unique_ptr++;
212 } while (cpool_ptr < cpool_end);
213 }
214
215 if (cpool_index == CPOOL_SIZE) {
216 /* Must allocate a new entry in the literal pool. */
217 if (compiler->cpool_fill < CPOOL_SIZE) {
218 cpool_index = compiler->cpool_fill;
219 compiler->cpool_fill++;
220 }
221 else {
222 FAIL_IF(push_cpool(compiler));
223 cpool_index = 0;
224 compiler->cpool_fill = 1;
225 }
226 }
227
228 SLJIT_ASSERT((inst & 0xfff) == 0);
229 ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
230 FAIL_IF(!ptr);
231 compiler->size++;
232 *ptr = inst | cpool_index;
233
234 compiler->cpool[cpool_index] = literal;
235 compiler->cpool_unique[cpool_index] = 0;
236 if (compiler->cpool_diff == CONST_POOL_EMPTY)
237 compiler->cpool_diff = compiler->size;
238 return SLJIT_SUCCESS;
239 }
240
push_inst_with_unique_literal(struct sljit_compiler * compiler,sljit_uw inst,sljit_uw literal)241 static sljit_s32 push_inst_with_unique_literal(struct sljit_compiler *compiler, sljit_uw inst, sljit_uw literal)
242 {
243 sljit_uw* ptr;
244 if (SLJIT_UNLIKELY((compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4092)) || compiler->cpool_fill >= CPOOL_SIZE))
245 FAIL_IF(push_cpool(compiler));
246
247 SLJIT_ASSERT(compiler->cpool_fill < CPOOL_SIZE && (inst & 0xfff) == 0);
248 ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
249 FAIL_IF(!ptr);
250 compiler->size++;
251 *ptr = inst | compiler->cpool_fill;
252
253 compiler->cpool[compiler->cpool_fill] = literal;
254 compiler->cpool_unique[compiler->cpool_fill] = 1;
255 compiler->cpool_fill++;
256 if (compiler->cpool_diff == CONST_POOL_EMPTY)
257 compiler->cpool_diff = compiler->size;
258 return SLJIT_SUCCESS;
259 }
260
prepare_blx(struct sljit_compiler * compiler)261 static SLJIT_INLINE sljit_s32 prepare_blx(struct sljit_compiler *compiler)
262 {
263 /* Place for at least two instruction (doesn't matter whether the first has a literal). */
264 if (SLJIT_UNLIKELY(compiler->cpool_diff != CONST_POOL_EMPTY && compiler->size - compiler->cpool_diff >= MAX_DIFFERENCE(4088)))
265 return push_cpool(compiler);
266 return SLJIT_SUCCESS;
267 }
268
emit_blx(struct sljit_compiler * compiler)269 static SLJIT_INLINE sljit_s32 emit_blx(struct sljit_compiler *compiler)
270 {
271 /* Must follow tightly the previous instruction (to be able to convert it to bl instruction). */
272 SLJIT_ASSERT(compiler->cpool_diff == CONST_POOL_EMPTY || compiler->size - compiler->cpool_diff < MAX_DIFFERENCE(4092));
273 SLJIT_ASSERT(reg_map[TMP_REG1] != 14);
274
275 return push_inst(compiler, BLX | RM(TMP_REG1));
276 }
277
patch_pc_relative_loads(sljit_uw * last_pc_patch,sljit_uw * code_ptr,sljit_uw * const_pool,sljit_uw cpool_size)278 static sljit_uw patch_pc_relative_loads(sljit_uw *last_pc_patch, sljit_uw *code_ptr, sljit_uw* const_pool, sljit_uw cpool_size)
279 {
280 sljit_uw diff;
281 sljit_uw ind;
282 sljit_uw counter = 0;
283 sljit_uw* clear_const_pool = const_pool;
284 sljit_uw* clear_const_pool_end = const_pool + cpool_size;
285
286 SLJIT_ASSERT(const_pool - code_ptr <= CONST_POOL_ALIGNMENT);
287 /* Set unused flag for all literals in the constant pool.
288 I.e.: unused literals can belong to branches, which can be encoded as B or BL.
289 We can "compress" the constant pool by discarding these literals. */
290 while (clear_const_pool < clear_const_pool_end)
291 *clear_const_pool++ = (sljit_uw)(-1);
292
293 while (last_pc_patch < code_ptr) {
294 /* Data transfer instruction with Rn == r15. */
295 if ((*last_pc_patch & 0x0c0f0000) == 0x040f0000) {
296 diff = const_pool - last_pc_patch;
297 ind = (*last_pc_patch) & 0xfff;
298
299 /* Must be a load instruction with immediate offset. */
300 SLJIT_ASSERT(ind < cpool_size && !(*last_pc_patch & (1 << 25)) && (*last_pc_patch & (1 << 20)));
301 if ((sljit_s32)const_pool[ind] < 0) {
302 const_pool[ind] = counter;
303 ind = counter;
304 counter++;
305 }
306 else
307 ind = const_pool[ind];
308
309 SLJIT_ASSERT(diff >= 1);
310 if (diff >= 2 || ind > 0) {
311 diff = (diff + ind - 2) << 2;
312 SLJIT_ASSERT(diff <= 0xfff);
313 *last_pc_patch = (*last_pc_patch & ~0xfff) | diff;
314 }
315 else
316 *last_pc_patch = (*last_pc_patch & ~(0xfff | (1 << 23))) | 0x004;
317 }
318 last_pc_patch++;
319 }
320 return counter;
321 }
322
323 /* In some rare ocasions we may need future patches. The probability is close to 0 in practice. */
324 struct future_patch {
325 struct future_patch* next;
326 sljit_s32 index;
327 sljit_s32 value;
328 };
329
resolve_const_pool_index(struct sljit_compiler * compiler,struct future_patch ** first_patch,sljit_uw cpool_current_index,sljit_uw * cpool_start_address,sljit_uw * buf_ptr)330 static sljit_s32 resolve_const_pool_index(struct sljit_compiler *compiler, struct future_patch **first_patch, sljit_uw cpool_current_index, sljit_uw *cpool_start_address, sljit_uw *buf_ptr)
331 {
332 sljit_s32 value;
333 struct future_patch *curr_patch, *prev_patch;
334
335 SLJIT_UNUSED_ARG(compiler);
336
337 /* Using the values generated by patch_pc_relative_loads. */
338 if (!*first_patch)
339 value = (sljit_s32)cpool_start_address[cpool_current_index];
340 else {
341 curr_patch = *first_patch;
342 prev_patch = NULL;
343 while (1) {
344 if (!curr_patch) {
345 value = (sljit_s32)cpool_start_address[cpool_current_index];
346 break;
347 }
348 if ((sljit_uw)curr_patch->index == cpool_current_index) {
349 value = curr_patch->value;
350 if (prev_patch)
351 prev_patch->next = curr_patch->next;
352 else
353 *first_patch = curr_patch->next;
354 SLJIT_FREE(curr_patch, compiler->allocator_data);
355 break;
356 }
357 prev_patch = curr_patch;
358 curr_patch = curr_patch->next;
359 }
360 }
361
362 if (value >= 0) {
363 if ((sljit_uw)value > cpool_current_index) {
364 curr_patch = (struct future_patch*)SLJIT_MALLOC(sizeof(struct future_patch), compiler->allocator_data);
365 if (!curr_patch) {
366 while (*first_patch) {
367 curr_patch = *first_patch;
368 *first_patch = (*first_patch)->next;
369 SLJIT_FREE(curr_patch, compiler->allocator_data);
370 }
371 return SLJIT_ERR_ALLOC_FAILED;
372 }
373 curr_patch->next = *first_patch;
374 curr_patch->index = value;
375 curr_patch->value = cpool_start_address[value];
376 *first_patch = curr_patch;
377 }
378 cpool_start_address[value] = *buf_ptr;
379 }
380 return SLJIT_SUCCESS;
381 }
382
383 #else
384
push_inst(struct sljit_compiler * compiler,sljit_uw inst)385 static sljit_s32 push_inst(struct sljit_compiler *compiler, sljit_uw inst)
386 {
387 sljit_uw* ptr;
388
389 ptr = (sljit_uw*)ensure_buf(compiler, sizeof(sljit_uw));
390 FAIL_IF(!ptr);
391 compiler->size++;
392 *ptr = inst;
393 return SLJIT_SUCCESS;
394 }
395
emit_imm(struct sljit_compiler * compiler,sljit_s32 reg,sljit_sw imm)396 static SLJIT_INLINE sljit_s32 emit_imm(struct sljit_compiler *compiler, sljit_s32 reg, sljit_sw imm)
397 {
398 FAIL_IF(push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff)));
399 return push_inst(compiler, MOVT | RD(reg) | ((imm >> 12) & 0xf0000) | ((imm >> 16) & 0xfff));
400 }
401
402 #endif
403
detect_jump_type(struct sljit_jump * jump,sljit_uw * code_ptr,sljit_uw * code,sljit_sw executable_offset)404 static SLJIT_INLINE sljit_s32 detect_jump_type(struct sljit_jump *jump, sljit_uw *code_ptr, sljit_uw *code, sljit_sw executable_offset)
405 {
406 sljit_sw diff;
407
408 if (jump->flags & SLJIT_REWRITABLE_JUMP)
409 return 0;
410
411 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
412 if (jump->flags & IS_BL)
413 code_ptr--;
414
415 if (jump->flags & JUMP_ADDR)
416 diff = ((sljit_sw)jump->u.target - (sljit_sw)(code_ptr + 2) - executable_offset);
417 else {
418 SLJIT_ASSERT(jump->flags & JUMP_LABEL);
419 diff = ((sljit_sw)(code + jump->u.label->size) - (sljit_sw)(code_ptr + 2));
420 }
421
422 /* Branch to Thumb code has not been optimized yet. */
423 if (diff & 0x3)
424 return 0;
425
426 if (jump->flags & IS_BL) {
427 if (diff <= 0x01ffffff && diff >= -0x02000000) {
428 *code_ptr = (BL - CONDITIONAL) | (*(code_ptr + 1) & COND_MASK);
429 jump->flags |= PATCH_B;
430 return 1;
431 }
432 }
433 else {
434 if (diff <= 0x01ffffff && diff >= -0x02000000) {
435 *code_ptr = (B - CONDITIONAL) | (*code_ptr & COND_MASK);
436 jump->flags |= PATCH_B;
437 }
438 }
439 #else
440 if (jump->flags & JUMP_ADDR)
441 diff = ((sljit_sw)jump->u.target - (sljit_sw)code_ptr - executable_offset);
442 else {
443 SLJIT_ASSERT(jump->flags & JUMP_LABEL);
444 diff = ((sljit_sw)(code + jump->u.label->size) - (sljit_sw)code_ptr);
445 }
446
447 /* Branch to Thumb code has not been optimized yet. */
448 if (diff & 0x3)
449 return 0;
450
451 if (diff <= 0x01ffffff && diff >= -0x02000000) {
452 code_ptr -= 2;
453 *code_ptr = ((jump->flags & IS_BL) ? (BL - CONDITIONAL) : (B - CONDITIONAL)) | (code_ptr[2] & COND_MASK);
454 jump->flags |= PATCH_B;
455 return 1;
456 }
457 #endif
458 return 0;
459 }
460
inline_set_jump_addr(sljit_uw jump_ptr,sljit_sw executable_offset,sljit_uw new_addr,sljit_s32 flush_cache)461 static SLJIT_INLINE void inline_set_jump_addr(sljit_uw jump_ptr, sljit_sw executable_offset, sljit_uw new_addr, sljit_s32 flush_cache)
462 {
463 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
464 sljit_uw *ptr = (sljit_uw *)jump_ptr;
465 sljit_uw *inst = (sljit_uw *)ptr[0];
466 sljit_uw mov_pc = ptr[1];
467 sljit_s32 bl = (mov_pc & 0x0000f000) != RD(TMP_PC);
468 sljit_sw diff = (sljit_sw)(((sljit_sw)new_addr - (sljit_sw)(inst + 2) - executable_offset) >> 2);
469
470 if (diff <= 0x7fffff && diff >= -0x800000) {
471 /* Turn to branch. */
472 if (!bl) {
473 inst[0] = (mov_pc & COND_MASK) | (B - CONDITIONAL) | (diff & 0xffffff);
474 if (flush_cache) {
475 inst = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
476 SLJIT_CACHE_FLUSH(inst, inst + 1);
477 }
478 } else {
479 inst[0] = (mov_pc & COND_MASK) | (BL - CONDITIONAL) | (diff & 0xffffff);
480 inst[1] = NOP;
481 if (flush_cache) {
482 inst = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
483 SLJIT_CACHE_FLUSH(inst, inst + 2);
484 }
485 }
486 } else {
487 /* Get the position of the constant. */
488 if (mov_pc & (1 << 23))
489 ptr = inst + ((mov_pc & 0xfff) >> 2) + 2;
490 else
491 ptr = inst + 1;
492
493 if (*inst != mov_pc) {
494 inst[0] = mov_pc;
495 if (!bl) {
496 if (flush_cache) {
497 inst = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
498 SLJIT_CACHE_FLUSH(inst, inst + 1);
499 }
500 } else {
501 inst[1] = BLX | RM(TMP_REG1);
502 if (flush_cache) {
503 inst = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
504 SLJIT_CACHE_FLUSH(inst, inst + 2);
505 }
506 }
507 }
508 *ptr = new_addr;
509 }
510 #else
511 sljit_uw *inst = (sljit_uw*)jump_ptr;
512 SLJIT_ASSERT((inst[0] & 0xfff00000) == MOVW && (inst[1] & 0xfff00000) == MOVT);
513 inst[0] = MOVW | (inst[0] & 0xf000) | ((new_addr << 4) & 0xf0000) | (new_addr & 0xfff);
514 inst[1] = MOVT | (inst[1] & 0xf000) | ((new_addr >> 12) & 0xf0000) | ((new_addr >> 16) & 0xfff);
515 if (flush_cache) {
516 inst = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
517 SLJIT_CACHE_FLUSH(inst, inst + 2);
518 }
519 #endif
520 }
521
522 static sljit_uw get_imm(sljit_uw imm);
523
inline_set_const(sljit_uw addr,sljit_sw executable_offset,sljit_sw new_constant,sljit_s32 flush_cache)524 static SLJIT_INLINE void inline_set_const(sljit_uw addr, sljit_sw executable_offset, sljit_sw new_constant, sljit_s32 flush_cache)
525 {
526 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
527 sljit_uw *ptr = (sljit_uw*)addr;
528 sljit_uw *inst = (sljit_uw*)ptr[0];
529 sljit_uw ldr_literal = ptr[1];
530 sljit_uw src2;
531
532 src2 = get_imm(new_constant);
533 if (src2) {
534 *inst = 0xe3a00000 | (ldr_literal & 0xf000) | src2;
535 if (flush_cache) {
536 inst = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
537 SLJIT_CACHE_FLUSH(inst, inst + 1);
538 }
539 return;
540 }
541
542 src2 = get_imm(~new_constant);
543 if (src2) {
544 *inst = 0xe3e00000 | (ldr_literal & 0xf000) | src2;
545 if (flush_cache) {
546 inst = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
547 SLJIT_CACHE_FLUSH(inst, inst + 1);
548 }
549 return;
550 }
551
552 if (ldr_literal & (1 << 23))
553 ptr = inst + ((ldr_literal & 0xfff) >> 2) + 2;
554 else
555 ptr = inst + 1;
556
557 if (*inst != ldr_literal) {
558 *inst = ldr_literal;
559 if (flush_cache) {
560 inst = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
561 SLJIT_CACHE_FLUSH(inst, inst + 1);
562 }
563 }
564 *ptr = new_constant;
565 #else
566 sljit_uw *inst = (sljit_uw*)addr;
567 SLJIT_ASSERT((inst[0] & 0xfff00000) == MOVW && (inst[1] & 0xfff00000) == MOVT);
568 inst[0] = MOVW | (inst[0] & 0xf000) | ((new_constant << 4) & 0xf0000) | (new_constant & 0xfff);
569 inst[1] = MOVT | (inst[1] & 0xf000) | ((new_constant >> 12) & 0xf0000) | ((new_constant >> 16) & 0xfff);
570 if (flush_cache) {
571 inst = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
572 SLJIT_CACHE_FLUSH(inst, inst + 2);
573 }
574 #endif
575 }
576
sljit_generate_code(struct sljit_compiler * compiler)577 SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler)
578 {
579 struct sljit_memory_fragment *buf;
580 sljit_uw *code;
581 sljit_uw *code_ptr;
582 sljit_uw *buf_ptr;
583 sljit_uw *buf_end;
584 sljit_uw size;
585 sljit_uw word_count;
586 sljit_uw next_addr;
587 sljit_sw executable_offset;
588 sljit_sw addr;
589 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
590 sljit_uw cpool_size;
591 sljit_uw cpool_skip_alignment;
592 sljit_uw cpool_current_index;
593 sljit_uw *cpool_start_address;
594 sljit_uw *last_pc_patch;
595 struct future_patch *first_patch;
596 #endif
597
598 struct sljit_label *label;
599 struct sljit_jump *jump;
600 struct sljit_const *const_;
601 struct sljit_put_label *put_label;
602
603 CHECK_ERROR_PTR();
604 CHECK_PTR(check_sljit_generate_code(compiler));
605 reverse_buf(compiler);
606
607 /* Second code generation pass. */
608 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
609 size = compiler->size + (compiler->patches << 1);
610 if (compiler->cpool_fill > 0)
611 size += compiler->cpool_fill + CONST_POOL_ALIGNMENT - 1;
612 #else
613 size = compiler->size;
614 #endif
615 code = (sljit_uw*)SLJIT_MALLOC_EXEC(size * sizeof(sljit_uw));
616 PTR_FAIL_WITH_EXEC_IF(code);
617 buf = compiler->buf;
618
619 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
620 cpool_size = 0;
621 cpool_skip_alignment = 0;
622 cpool_current_index = 0;
623 cpool_start_address = NULL;
624 first_patch = NULL;
625 last_pc_patch = code;
626 #endif
627
628 code_ptr = code;
629 word_count = 0;
630 next_addr = 1;
631 executable_offset = SLJIT_EXEC_OFFSET(code);
632
633 label = compiler->labels;
634 jump = compiler->jumps;
635 const_ = compiler->consts;
636 put_label = compiler->put_labels;
637
638 if (label && label->size == 0) {
639 label->addr = (sljit_uw)SLJIT_ADD_EXEC_OFFSET(code, executable_offset);
640 label = label->next;
641 }
642
643 do {
644 buf_ptr = (sljit_uw*)buf->memory;
645 buf_end = buf_ptr + (buf->used_size >> 2);
646 do {
647 word_count++;
648 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
649 if (cpool_size > 0) {
650 if (cpool_skip_alignment > 0) {
651 buf_ptr++;
652 cpool_skip_alignment--;
653 }
654 else {
655 if (SLJIT_UNLIKELY(resolve_const_pool_index(compiler, &first_patch, cpool_current_index, cpool_start_address, buf_ptr))) {
656 SLJIT_FREE_EXEC(code);
657 compiler->error = SLJIT_ERR_ALLOC_FAILED;
658 return NULL;
659 }
660 buf_ptr++;
661 if (++cpool_current_index >= cpool_size) {
662 SLJIT_ASSERT(!first_patch);
663 cpool_size = 0;
664 if (label && label->size == word_count) {
665 /* Points after the current instruction. */
666 label->addr = (sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
667 label->size = code_ptr - code;
668 label = label->next;
669
670 next_addr = compute_next_addr(label, jump, const_, put_label);
671 }
672 }
673 }
674 }
675 else if ((*buf_ptr & 0xff000000) != PUSH_POOL) {
676 #endif
677 *code_ptr = *buf_ptr++;
678 if (next_addr == word_count) {
679 SLJIT_ASSERT(!label || label->size >= word_count);
680 SLJIT_ASSERT(!jump || jump->addr >= word_count);
681 SLJIT_ASSERT(!const_ || const_->addr >= word_count);
682 SLJIT_ASSERT(!put_label || put_label->addr >= word_count);
683
684 /* These structures are ordered by their address. */
685 if (jump && jump->addr == word_count) {
686 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
687 if (detect_jump_type(jump, code_ptr, code, executable_offset))
688 code_ptr--;
689 jump->addr = (sljit_uw)code_ptr;
690 #else
691 jump->addr = (sljit_uw)(code_ptr - 2);
692 if (detect_jump_type(jump, code_ptr, code, executable_offset))
693 code_ptr -= 2;
694 #endif
695 jump = jump->next;
696 }
697 if (label && label->size == word_count) {
698 /* code_ptr can be affected above. */
699 label->addr = (sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr + 1, executable_offset);
700 label->size = (code_ptr + 1) - code;
701 label = label->next;
702 }
703 if (const_ && const_->addr == word_count) {
704 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
705 const_->addr = (sljit_uw)code_ptr;
706 #else
707 const_->addr = (sljit_uw)(code_ptr - 1);
708 #endif
709 const_ = const_->next;
710 }
711 if (put_label && put_label->addr == word_count) {
712 SLJIT_ASSERT(put_label->label);
713 put_label->addr = (sljit_uw)code_ptr;
714 put_label = put_label->next;
715 }
716 next_addr = compute_next_addr(label, jump, const_, put_label);
717 }
718 code_ptr++;
719 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
720 }
721 else {
722 /* Fortunately, no need to shift. */
723 cpool_size = *buf_ptr++ & ~PUSH_POOL;
724 SLJIT_ASSERT(cpool_size > 0);
725 cpool_start_address = ALIGN_INSTRUCTION(code_ptr + 1);
726 cpool_current_index = patch_pc_relative_loads(last_pc_patch, code_ptr, cpool_start_address, cpool_size);
727 if (cpool_current_index > 0) {
728 /* Unconditional branch. */
729 *code_ptr = B | (((cpool_start_address - code_ptr) + cpool_current_index - 2) & ~PUSH_POOL);
730 code_ptr = cpool_start_address + cpool_current_index;
731 }
732 cpool_skip_alignment = CONST_POOL_ALIGNMENT - 1;
733 cpool_current_index = 0;
734 last_pc_patch = code_ptr;
735 }
736 #endif
737 } while (buf_ptr < buf_end);
738 buf = buf->next;
739 } while (buf);
740
741 SLJIT_ASSERT(!label);
742 SLJIT_ASSERT(!jump);
743 SLJIT_ASSERT(!const_);
744 SLJIT_ASSERT(!put_label);
745
746 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
747 SLJIT_ASSERT(cpool_size == 0);
748 if (compiler->cpool_fill > 0) {
749 cpool_start_address = ALIGN_INSTRUCTION(code_ptr);
750 cpool_current_index = patch_pc_relative_loads(last_pc_patch, code_ptr, cpool_start_address, compiler->cpool_fill);
751 if (cpool_current_index > 0)
752 code_ptr = cpool_start_address + cpool_current_index;
753
754 buf_ptr = compiler->cpool;
755 buf_end = buf_ptr + compiler->cpool_fill;
756 cpool_current_index = 0;
757 while (buf_ptr < buf_end) {
758 if (SLJIT_UNLIKELY(resolve_const_pool_index(compiler, &first_patch, cpool_current_index, cpool_start_address, buf_ptr))) {
759 SLJIT_FREE_EXEC(code);
760 compiler->error = SLJIT_ERR_ALLOC_FAILED;
761 return NULL;
762 }
763 buf_ptr++;
764 cpool_current_index++;
765 }
766 SLJIT_ASSERT(!first_patch);
767 }
768 #endif
769
770 jump = compiler->jumps;
771 while (jump) {
772 buf_ptr = (sljit_uw *)jump->addr;
773
774 if (jump->flags & PATCH_B) {
775 addr = (sljit_sw)SLJIT_ADD_EXEC_OFFSET(buf_ptr + 2, executable_offset);
776 if (!(jump->flags & JUMP_ADDR)) {
777 SLJIT_ASSERT(jump->flags & JUMP_LABEL);
778 SLJIT_ASSERT(((sljit_sw)jump->u.label->addr - addr) <= 0x01ffffff && ((sljit_sw)jump->u.label->addr - addr) >= -0x02000000);
779 *buf_ptr |= (((sljit_sw)jump->u.label->addr - addr) >> 2) & 0x00ffffff;
780 }
781 else {
782 SLJIT_ASSERT(((sljit_sw)jump->u.target - addr) <= 0x01ffffff && ((sljit_sw)jump->u.target - addr) >= -0x02000000);
783 *buf_ptr |= (((sljit_sw)jump->u.target - addr) >> 2) & 0x00ffffff;
784 }
785 }
786 else if (jump->flags & SLJIT_REWRITABLE_JUMP) {
787 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
788 jump->addr = (sljit_uw)code_ptr;
789 code_ptr[0] = (sljit_uw)buf_ptr;
790 code_ptr[1] = *buf_ptr;
791 inline_set_jump_addr((sljit_uw)code_ptr, executable_offset, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
792 code_ptr += 2;
793 #else
794 inline_set_jump_addr((sljit_uw)buf_ptr, executable_offset, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
795 #endif
796 }
797 else {
798 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
799 if (jump->flags & IS_BL)
800 buf_ptr--;
801 if (*buf_ptr & (1 << 23))
802 buf_ptr += ((*buf_ptr & 0xfff) >> 2) + 2;
803 else
804 buf_ptr += 1;
805 *buf_ptr = (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target;
806 #else
807 inline_set_jump_addr((sljit_uw)buf_ptr, executable_offset, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
808 #endif
809 }
810 jump = jump->next;
811 }
812
813 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
814 const_ = compiler->consts;
815 while (const_) {
816 buf_ptr = (sljit_uw*)const_->addr;
817 const_->addr = (sljit_uw)code_ptr;
818
819 code_ptr[0] = (sljit_uw)buf_ptr;
820 code_ptr[1] = *buf_ptr;
821 if (*buf_ptr & (1 << 23))
822 buf_ptr += ((*buf_ptr & 0xfff) >> 2) + 2;
823 else
824 buf_ptr += 1;
825 /* Set the value again (can be a simple constant). */
826 inline_set_const((sljit_uw)code_ptr, executable_offset, *buf_ptr, 0);
827 code_ptr += 2;
828
829 const_ = const_->next;
830 }
831 #endif
832
833 put_label = compiler->put_labels;
834 while (put_label) {
835 addr = put_label->label->addr;
836 buf_ptr = (sljit_uw*)put_label->addr;
837
838 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
839 SLJIT_ASSERT((buf_ptr[0] & 0xffff0000) == 0xe59f0000);
840 buf_ptr[((buf_ptr[0] & 0xfff) >> 2) + 2] = addr;
841 #else
842 SLJIT_ASSERT((buf_ptr[-1] & 0xfff00000) == MOVW && (buf_ptr[0] & 0xfff00000) == MOVT);
843 buf_ptr[-1] |= ((addr << 4) & 0xf0000) | (addr & 0xfff);
844 buf_ptr[0] |= ((addr >> 12) & 0xf0000) | ((addr >> 16) & 0xfff);
845 #endif
846 put_label = put_label->next;
847 }
848
849 SLJIT_ASSERT(code_ptr - code <= (sljit_s32)size);
850
851 compiler->error = SLJIT_ERR_COMPILED;
852 compiler->executable_offset = executable_offset;
853 compiler->executable_size = (code_ptr - code) * sizeof(sljit_uw);
854
855 code = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(code, executable_offset);
856 code_ptr = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
857
858 SLJIT_CACHE_FLUSH(code, code_ptr);
859 return code;
860 }
861
sljit_has_cpu_feature(sljit_s32 feature_type)862 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_has_cpu_feature(sljit_s32 feature_type)
863 {
864 switch (feature_type) {
865 case SLJIT_HAS_FPU:
866 #ifdef SLJIT_IS_FPU_AVAILABLE
867 return SLJIT_IS_FPU_AVAILABLE;
868 #else
869 /* Available by default. */
870 return 1;
871 #endif
872
873 case SLJIT_HAS_CLZ:
874 case SLJIT_HAS_CMOV:
875 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
876 case SLJIT_HAS_PREFETCH:
877 #endif
878 return 1;
879
880 default:
881 return 0;
882 }
883 }
884
885 /* --------------------------------------------------------------------- */
886 /* Entry, exit */
887 /* --------------------------------------------------------------------- */
888
889 /* Creates an index in data_transfer_insts array. */
890 #define WORD_SIZE 0x00
891 #define BYTE_SIZE 0x01
892 #define HALF_SIZE 0x02
893 #define PRELOAD 0x03
894 #define SIGNED 0x04
895 #define LOAD_DATA 0x08
896
897 /* Flag bits for emit_op. */
898 #define ALLOW_IMM 0x10
899 #define ALLOW_INV_IMM 0x20
900 #define ALLOW_ANY_IMM (ALLOW_IMM | ALLOW_INV_IMM)
901
902 /* s/l - store/load (1 bit)
903 u/s - signed/unsigned (1 bit)
904 w/b/h/N - word/byte/half/NOT allowed (2 bit)
905 Storing signed and unsigned values are the same operations. */
906
907 static const sljit_uw data_transfer_insts[16] = {
908 /* s u w */ 0xe5000000 /* str */,
909 /* s u b */ 0xe5400000 /* strb */,
910 /* s u h */ 0xe10000b0 /* strh */,
911 /* s u N */ 0x00000000 /* not allowed */,
912 /* s s w */ 0xe5000000 /* str */,
913 /* s s b */ 0xe5400000 /* strb */,
914 /* s s h */ 0xe10000b0 /* strh */,
915 /* s s N */ 0x00000000 /* not allowed */,
916
917 /* l u w */ 0xe5100000 /* ldr */,
918 /* l u b */ 0xe5500000 /* ldrb */,
919 /* l u h */ 0xe11000b0 /* ldrh */,
920 /* l u p */ 0xf5500000 /* preload */,
921 /* l s w */ 0xe5100000 /* ldr */,
922 /* l s b */ 0xe11000d0 /* ldrsb */,
923 /* l s h */ 0xe11000f0 /* ldrsh */,
924 /* l s N */ 0x00000000 /* not allowed */,
925 };
926
927 #define EMIT_DATA_TRANSFER(type, add, target_reg, base_reg, arg) \
928 (data_transfer_insts[(type) & 0xf] | ((add) << 23) | RD(target_reg) | RN(base_reg) | (arg))
929
930 /* Normal ldr/str instruction.
931 Type2: ldrsb, ldrh, ldrsh */
932 #define IS_TYPE1_TRANSFER(type) \
933 (data_transfer_insts[(type) & 0xf] & 0x04000000)
934 #define TYPE2_TRANSFER_IMM(imm) \
935 (((imm) & 0xf) | (((imm) & 0xf0) << 4) | (1 << 22))
936
937 static sljit_s32 emit_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 inp_flags,
938 sljit_s32 dst, sljit_sw dstw,
939 sljit_s32 src1, sljit_sw src1w,
940 sljit_s32 src2, sljit_sw src2w);
941
sljit_emit_enter(struct sljit_compiler * compiler,sljit_s32 options,sljit_s32 arg_types,sljit_s32 scratches,sljit_s32 saveds,sljit_s32 fscratches,sljit_s32 fsaveds,sljit_s32 local_size)942 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler,
943 sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
944 sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
945 {
946 sljit_s32 args, size, i, tmp;
947 sljit_uw push;
948
949 CHECK_ERROR();
950 CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
951 set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
952
953 /* Push saved registers, temporary registers
954 stmdb sp!, {..., lr} */
955 push = PUSH | (1 << 14);
956
957 tmp = saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - saveds) : SLJIT_FIRST_SAVED_REG;
958 for (i = SLJIT_S0; i >= tmp; i--)
959 push |= 1 << reg_map[i];
960
961 for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
962 push |= 1 << reg_map[i];
963
964 FAIL_IF(push_inst(compiler, push));
965
966 /* Stack must be aligned to 8 bytes: */
967 size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
968 local_size = ((size + local_size + 7) & ~7) - size;
969 compiler->local_size = local_size;
970 if (local_size > 0)
971 FAIL_IF(emit_op(compiler, SLJIT_SUB, ALLOW_IMM, SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size));
972
973 args = get_arg_count(arg_types);
974
975 if (args >= 1)
976 FAIL_IF(push_inst(compiler, MOV | RD(SLJIT_S0) | RM(SLJIT_R0)));
977 if (args >= 2)
978 FAIL_IF(push_inst(compiler, MOV | RD(SLJIT_S1) | RM(SLJIT_R1)));
979 if (args >= 3)
980 FAIL_IF(push_inst(compiler, MOV | RD(SLJIT_S2) | RM(SLJIT_R2)));
981
982 return SLJIT_SUCCESS;
983 }
984
sljit_set_context(struct sljit_compiler * compiler,sljit_s32 options,sljit_s32 arg_types,sljit_s32 scratches,sljit_s32 saveds,sljit_s32 fscratches,sljit_s32 fsaveds,sljit_s32 local_size)985 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler,
986 sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
987 sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
988 {
989 sljit_s32 size;
990
991 CHECK_ERROR();
992 CHECK(check_sljit_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
993 set_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
994
995 size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
996 compiler->local_size = ((size + local_size + 7) & ~7) - size;
997 return SLJIT_SUCCESS;
998 }
999
sljit_emit_return(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src,sljit_sw srcw)1000 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw)
1001 {
1002 sljit_s32 i, tmp;
1003 sljit_uw pop;
1004
1005 CHECK_ERROR();
1006 CHECK(check_sljit_emit_return(compiler, op, src, srcw));
1007
1008 FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
1009
1010 if (compiler->local_size > 0)
1011 FAIL_IF(emit_op(compiler, SLJIT_ADD, ALLOW_IMM, SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, compiler->local_size));
1012
1013 /* Push saved registers, temporary registers
1014 ldmia sp!, {..., pc} */
1015 pop = POP | (1 << 15);
1016
1017 tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG;
1018 for (i = SLJIT_S0; i >= tmp; i--)
1019 pop |= 1 << reg_map[i];
1020
1021 for (i = compiler->scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
1022 pop |= 1 << reg_map[i];
1023
1024 return push_inst(compiler, pop);
1025 }
1026
1027 /* --------------------------------------------------------------------- */
1028 /* Operators */
1029 /* --------------------------------------------------------------------- */
1030
1031 /* flags: */
1032 /* Arguments are swapped. */
1033 #define ARGS_SWAPPED 0x01
1034 /* Inverted immediate. */
1035 #define INV_IMM 0x02
1036 /* Source and destination is register. */
1037 #define MOVE_REG_CONV 0x04
1038 /* Unused return value. */
1039 #define UNUSED_RETURN 0x08
1040 /* SET_FLAGS must be (1 << 20) as it is also the value of S bit (can be used for optimization). */
1041 #define SET_FLAGS (1 << 20)
1042 /* dst: reg
1043 src1: reg
1044 src2: reg or imm (if allowed)
1045 SRC2_IMM must be (1 << 25) as it is also the value of I bit (can be used for optimization). */
1046 #define SRC2_IMM (1 << 25)
1047
1048 #define EMIT_SHIFT_INS_AND_RETURN(opcode) \
1049 SLJIT_ASSERT(!(flags & INV_IMM) && !(src2 & SRC2_IMM)); \
1050 if (compiler->shift_imm != 0x20) { \
1051 SLJIT_ASSERT(src1 == TMP_REG1); \
1052 SLJIT_ASSERT(!(flags & ARGS_SWAPPED)); \
1053 \
1054 if (compiler->shift_imm != 0) \
1055 return push_inst(compiler, MOV | (flags & SET_FLAGS) | \
1056 RD(dst) | (compiler->shift_imm << 7) | (opcode << 5) | RM(src2)); \
1057 return push_inst(compiler, MOV | (flags & SET_FLAGS) | RD(dst) | RM(src2)); \
1058 } \
1059 return push_inst(compiler, MOV | (flags & SET_FLAGS) | RD(dst) | \
1060 (reg_map[(flags & ARGS_SWAPPED) ? src1 : src2] << 8) | (opcode << 5) | 0x10 | RM((flags & ARGS_SWAPPED) ? src2 : src1));
1061
emit_single_op(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 flags,sljit_s32 dst,sljit_s32 src1,sljit_s32 src2)1062 static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags,
1063 sljit_s32 dst, sljit_s32 src1, sljit_s32 src2)
1064 {
1065 switch (GET_OPCODE(op)) {
1066 case SLJIT_MOV:
1067 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1068 if (dst != src2) {
1069 if (src2 & SRC2_IMM) {
1070 return push_inst(compiler, ((flags & INV_IMM) ? MVN : MOV) | RD(dst) | src2);
1071 }
1072 return push_inst(compiler, MOV | RD(dst) | RM(src2));
1073 }
1074 return SLJIT_SUCCESS;
1075
1076 case SLJIT_MOV_U8:
1077 case SLJIT_MOV_S8:
1078 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1079 if (flags & MOVE_REG_CONV) {
1080 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1081 if (op == SLJIT_MOV_U8)
1082 return push_inst(compiler, AND | RD(dst) | RN(src2) | SRC2_IMM | 0xff);
1083 FAIL_IF(push_inst(compiler, MOV | RD(dst) | (24 << 7) | RM(src2)));
1084 return push_inst(compiler, MOV | RD(dst) | (24 << 7) | (op == SLJIT_MOV_U8 ? 0x20 : 0x40) | RM(dst));
1085 #else
1086 return push_inst(compiler, (op == SLJIT_MOV_U8 ? UXTB : SXTB) | RD(dst) | RM(src2));
1087 #endif
1088 }
1089 else if (dst != src2) {
1090 SLJIT_ASSERT(src2 & SRC2_IMM);
1091 return push_inst(compiler, ((flags & INV_IMM) ? MVN : MOV) | RD(dst) | src2);
1092 }
1093 return SLJIT_SUCCESS;
1094
1095 case SLJIT_MOV_U16:
1096 case SLJIT_MOV_S16:
1097 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1098 if (flags & MOVE_REG_CONV) {
1099 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1100 FAIL_IF(push_inst(compiler, MOV | RD(dst) | (16 << 7) | RM(src2)));
1101 return push_inst(compiler, MOV | RD(dst) | (16 << 7) | (op == SLJIT_MOV_U16 ? 0x20 : 0x40) | RM(dst));
1102 #else
1103 return push_inst(compiler, (op == SLJIT_MOV_U16 ? UXTH : SXTH) | RD(dst) | RM(src2));
1104 #endif
1105 }
1106 else if (dst != src2) {
1107 SLJIT_ASSERT(src2 & SRC2_IMM);
1108 return push_inst(compiler, ((flags & INV_IMM) ? MVN : MOV) | RD(dst) | src2);
1109 }
1110 return SLJIT_SUCCESS;
1111
1112 case SLJIT_NOT:
1113 if (src2 & SRC2_IMM) {
1114 return push_inst(compiler, ((flags & INV_IMM) ? MOV : MVN) | (flags & SET_FLAGS) | RD(dst) | src2);
1115 }
1116 return push_inst(compiler, MVN | (flags & SET_FLAGS) | RD(dst) | RM(src2));
1117
1118 case SLJIT_CLZ:
1119 SLJIT_ASSERT(!(flags & INV_IMM));
1120 SLJIT_ASSERT(!(src2 & SRC2_IMM));
1121 FAIL_IF(push_inst(compiler, CLZ | RD(dst) | RM(src2)));
1122 return SLJIT_SUCCESS;
1123
1124 case SLJIT_ADD:
1125 SLJIT_ASSERT(!(flags & INV_IMM));
1126 if ((flags & (UNUSED_RETURN | SET_FLAGS)) == (UNUSED_RETURN | SET_FLAGS) && !(flags & ARGS_SWAPPED))
1127 return push_inst(compiler, CMN | SET_FLAGS | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1128 return push_inst(compiler, ADD | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1129
1130 case SLJIT_ADDC:
1131 SLJIT_ASSERT(!(flags & INV_IMM));
1132 return push_inst(compiler, ADC | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1133
1134 case SLJIT_SUB:
1135 SLJIT_ASSERT(!(flags & INV_IMM));
1136 if ((flags & (UNUSED_RETURN | SET_FLAGS)) == (UNUSED_RETURN | SET_FLAGS) && !(flags & ARGS_SWAPPED))
1137 return push_inst(compiler, CMP | SET_FLAGS | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1138 return push_inst(compiler, (!(flags & ARGS_SWAPPED) ? SUB : RSB) | (flags & SET_FLAGS)
1139 | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1140
1141 case SLJIT_SUBC:
1142 SLJIT_ASSERT(!(flags & INV_IMM));
1143 return push_inst(compiler, (!(flags & ARGS_SWAPPED) ? SBC : RSC) | (flags & SET_FLAGS)
1144 | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1145
1146 case SLJIT_MUL:
1147 SLJIT_ASSERT(!(flags & INV_IMM));
1148 SLJIT_ASSERT(!(src2 & SRC2_IMM));
1149
1150 if (!HAS_FLAGS(op))
1151 return push_inst(compiler, MUL | (reg_map[dst] << 16) | (reg_map[src2] << 8) | reg_map[src1]);
1152
1153 FAIL_IF(push_inst(compiler, SMULL | (reg_map[TMP_REG1] << 16) | (reg_map[dst] << 12) | (reg_map[src2] << 8) | reg_map[src1]));
1154
1155 /* cmp TMP_REG1, dst asr #31. */
1156 return push_inst(compiler, CMP | SET_FLAGS | RN(TMP_REG1) | RM(dst) | 0xfc0);
1157
1158 case SLJIT_AND:
1159 return push_inst(compiler, (!(flags & INV_IMM) ? AND : BIC) | (flags & SET_FLAGS)
1160 | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1161
1162 case SLJIT_OR:
1163 SLJIT_ASSERT(!(flags & INV_IMM));
1164 return push_inst(compiler, ORR | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1165
1166 case SLJIT_XOR:
1167 SLJIT_ASSERT(!(flags & INV_IMM));
1168 return push_inst(compiler, EOR | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1169
1170 case SLJIT_SHL:
1171 EMIT_SHIFT_INS_AND_RETURN(0);
1172
1173 case SLJIT_LSHR:
1174 EMIT_SHIFT_INS_AND_RETURN(1);
1175
1176 case SLJIT_ASHR:
1177 EMIT_SHIFT_INS_AND_RETURN(2);
1178 }
1179
1180 SLJIT_UNREACHABLE();
1181 return SLJIT_SUCCESS;
1182 }
1183
1184 #undef EMIT_SHIFT_INS_AND_RETURN
1185
1186 /* Tests whether the immediate can be stored in the 12 bit imm field.
1187 Returns with 0 if not possible. */
get_imm(sljit_uw imm)1188 static sljit_uw get_imm(sljit_uw imm)
1189 {
1190 sljit_s32 rol;
1191
1192 if (imm <= 0xff)
1193 return SRC2_IMM | imm;
1194
1195 if (!(imm & 0xff000000)) {
1196 imm <<= 8;
1197 rol = 8;
1198 }
1199 else {
1200 imm = (imm << 24) | (imm >> 8);
1201 rol = 0;
1202 }
1203
1204 if (!(imm & 0xff000000)) {
1205 imm <<= 8;
1206 rol += 4;
1207 }
1208
1209 if (!(imm & 0xf0000000)) {
1210 imm <<= 4;
1211 rol += 2;
1212 }
1213
1214 if (!(imm & 0xc0000000)) {
1215 imm <<= 2;
1216 rol += 1;
1217 }
1218
1219 if (!(imm & 0x00ffffff))
1220 return SRC2_IMM | (imm >> 24) | (rol << 8);
1221 else
1222 return 0;
1223 }
1224
1225 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
generate_int(struct sljit_compiler * compiler,sljit_s32 reg,sljit_uw imm,sljit_s32 positive)1226 static sljit_s32 generate_int(struct sljit_compiler *compiler, sljit_s32 reg, sljit_uw imm, sljit_s32 positive)
1227 {
1228 sljit_uw mask;
1229 sljit_uw imm1;
1230 sljit_uw imm2;
1231 sljit_s32 rol;
1232
1233 /* Step1: Search a zero byte (8 continous zero bit). */
1234 mask = 0xff000000;
1235 rol = 8;
1236 while(1) {
1237 if (!(imm & mask)) {
1238 /* Rol imm by rol. */
1239 imm = (imm << rol) | (imm >> (32 - rol));
1240 /* Calculate arm rol. */
1241 rol = 4 + (rol >> 1);
1242 break;
1243 }
1244 rol += 2;
1245 mask >>= 2;
1246 if (mask & 0x3) {
1247 /* rol by 8. */
1248 imm = (imm << 8) | (imm >> 24);
1249 mask = 0xff00;
1250 rol = 24;
1251 while (1) {
1252 if (!(imm & mask)) {
1253 /* Rol imm by rol. */
1254 imm = (imm << rol) | (imm >> (32 - rol));
1255 /* Calculate arm rol. */
1256 rol = (rol >> 1) - 8;
1257 break;
1258 }
1259 rol += 2;
1260 mask >>= 2;
1261 if (mask & 0x3)
1262 return 0;
1263 }
1264 break;
1265 }
1266 }
1267
1268 /* The low 8 bit must be zero. */
1269 SLJIT_ASSERT(!(imm & 0xff));
1270
1271 if (!(imm & 0xff000000)) {
1272 imm1 = SRC2_IMM | ((imm >> 16) & 0xff) | (((rol + 4) & 0xf) << 8);
1273 imm2 = SRC2_IMM | ((imm >> 8) & 0xff) | (((rol + 8) & 0xf) << 8);
1274 }
1275 else if (imm & 0xc0000000) {
1276 imm1 = SRC2_IMM | ((imm >> 24) & 0xff) | ((rol & 0xf) << 8);
1277 imm <<= 8;
1278 rol += 4;
1279
1280 if (!(imm & 0xff000000)) {
1281 imm <<= 8;
1282 rol += 4;
1283 }
1284
1285 if (!(imm & 0xf0000000)) {
1286 imm <<= 4;
1287 rol += 2;
1288 }
1289
1290 if (!(imm & 0xc0000000)) {
1291 imm <<= 2;
1292 rol += 1;
1293 }
1294
1295 if (!(imm & 0x00ffffff))
1296 imm2 = SRC2_IMM | (imm >> 24) | ((rol & 0xf) << 8);
1297 else
1298 return 0;
1299 }
1300 else {
1301 if (!(imm & 0xf0000000)) {
1302 imm <<= 4;
1303 rol += 2;
1304 }
1305
1306 if (!(imm & 0xc0000000)) {
1307 imm <<= 2;
1308 rol += 1;
1309 }
1310
1311 imm1 = SRC2_IMM | ((imm >> 24) & 0xff) | ((rol & 0xf) << 8);
1312 imm <<= 8;
1313 rol += 4;
1314
1315 if (!(imm & 0xf0000000)) {
1316 imm <<= 4;
1317 rol += 2;
1318 }
1319
1320 if (!(imm & 0xc0000000)) {
1321 imm <<= 2;
1322 rol += 1;
1323 }
1324
1325 if (!(imm & 0x00ffffff))
1326 imm2 = SRC2_IMM | (imm >> 24) | ((rol & 0xf) << 8);
1327 else
1328 return 0;
1329 }
1330
1331 FAIL_IF(push_inst(compiler, (positive ? MOV : MVN) | RD(reg) | imm1));
1332 FAIL_IF(push_inst(compiler, (positive ? ORR : BIC) | RD(reg) | RN(reg) | imm2));
1333 return 1;
1334 }
1335 #endif
1336
load_immediate(struct sljit_compiler * compiler,sljit_s32 reg,sljit_uw imm)1337 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 reg, sljit_uw imm)
1338 {
1339 sljit_uw tmp;
1340
1341 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
1342 if (!(imm & ~0xffff))
1343 return push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff));
1344 #endif
1345
1346 /* Create imm by 1 inst. */
1347 tmp = get_imm(imm);
1348 if (tmp)
1349 return push_inst(compiler, MOV | RD(reg) | tmp);
1350
1351 tmp = get_imm(~imm);
1352 if (tmp)
1353 return push_inst(compiler, MVN | RD(reg) | tmp);
1354
1355 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1356 /* Create imm by 2 inst. */
1357 FAIL_IF(generate_int(compiler, reg, imm, 1));
1358 FAIL_IF(generate_int(compiler, reg, ~imm, 0));
1359
1360 /* Load integer. */
1361 return push_inst_with_literal(compiler, EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1, reg, TMP_PC, 0), imm);
1362 #else
1363 FAIL_IF(push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff)));
1364 if (imm <= 0xffff)
1365 return SLJIT_SUCCESS;
1366 return push_inst(compiler, MOVT | RD(reg) | ((imm >> 12) & 0xf0000) | ((imm >> 16) & 0xfff));
1367 #endif
1368 }
1369
emit_op_mem(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 reg,sljit_s32 arg,sljit_sw argw,sljit_s32 tmp_reg)1370 static SLJIT_INLINE sljit_s32 emit_op_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg,
1371 sljit_s32 arg, sljit_sw argw, sljit_s32 tmp_reg)
1372 {
1373 sljit_uw imm, offset_reg;
1374 sljit_uw is_type1_transfer = IS_TYPE1_TRANSFER(flags);
1375
1376 SLJIT_ASSERT (arg & SLJIT_MEM);
1377 SLJIT_ASSERT((arg & REG_MASK) != tmp_reg);
1378
1379 if ((arg & REG_MASK) == SLJIT_UNUSED) {
1380 if (is_type1_transfer) {
1381 FAIL_IF(load_immediate(compiler, tmp_reg, argw & ~0xfff));
1382 argw &= 0xfff;
1383 }
1384 else {
1385 FAIL_IF(load_immediate(compiler, tmp_reg, argw & ~0xff));
1386 argw &= 0xff;
1387 }
1388
1389 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, tmp_reg,
1390 is_type1_transfer ? argw : TYPE2_TRANSFER_IMM(argw)));
1391 }
1392
1393 if (arg & OFFS_REG_MASK) {
1394 offset_reg = OFFS_REG(arg);
1395 arg &= REG_MASK;
1396 argw &= 0x3;
1397
1398 if (argw != 0 && !is_type1_transfer) {
1399 FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg) | RM(offset_reg) | (argw << 7)));
1400 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, tmp_reg, TYPE2_TRANSFER_IMM(0)));
1401 }
1402
1403 /* Bit 25: RM is offset. */
1404 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg,
1405 RM(offset_reg) | (is_type1_transfer ? (1 << 25) : 0) | (argw << 7)));
1406 }
1407
1408 arg &= REG_MASK;
1409
1410 if (is_type1_transfer) {
1411 if (argw > 0xfff) {
1412 imm = get_imm(argw & ~0xfff);
1413 if (imm) {
1414 FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg) | imm));
1415 argw = argw & 0xfff;
1416 arg = tmp_reg;
1417 }
1418 }
1419 else if (argw < -0xfff) {
1420 imm = get_imm(-argw & ~0xfff);
1421 if (imm) {
1422 FAIL_IF(push_inst(compiler, SUB | RD(tmp_reg) | RN(arg) | imm));
1423 argw = -(-argw & 0xfff);
1424 arg = tmp_reg;
1425 }
1426 }
1427
1428 if (argw >= 0 && argw <= 0xfff)
1429 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg, argw));
1430
1431 if (argw < 0 && argw >= -0xfff)
1432 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 0, reg, arg, -argw));
1433 }
1434 else {
1435 if (argw > 0xff) {
1436 imm = get_imm(argw & ~0xff);
1437 if (imm) {
1438 FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg) | imm));
1439 argw = argw & 0xff;
1440 arg = tmp_reg;
1441 }
1442 }
1443 else if (argw < -0xff) {
1444 imm = get_imm(-argw & ~0xff);
1445 if (imm) {
1446 FAIL_IF(push_inst(compiler, SUB | RD(tmp_reg) | RN(arg) | imm));
1447 argw = -(-argw & 0xff);
1448 arg = tmp_reg;
1449 }
1450 }
1451
1452 if (argw >= 0 && argw <= 0xff)
1453 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg, TYPE2_TRANSFER_IMM(argw)));
1454
1455 if (argw < 0 && argw >= -0xff) {
1456 argw = -argw;
1457 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 0, reg, arg, TYPE2_TRANSFER_IMM(argw)));
1458 }
1459 }
1460
1461 FAIL_IF(load_immediate(compiler, tmp_reg, argw));
1462 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg,
1463 RM(tmp_reg) | (is_type1_transfer ? (1 << 25) : 0)));
1464 }
1465
emit_op(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 inp_flags,sljit_s32 dst,sljit_sw dstw,sljit_s32 src1,sljit_sw src1w,sljit_s32 src2,sljit_sw src2w)1466 static sljit_s32 emit_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 inp_flags,
1467 sljit_s32 dst, sljit_sw dstw,
1468 sljit_s32 src1, sljit_sw src1w,
1469 sljit_s32 src2, sljit_sw src2w)
1470 {
1471 /* src1 is reg or TMP_REG1
1472 src2 is reg, TMP_REG2, or imm
1473 result goes to TMP_REG2, so put result can use TMP_REG1. */
1474
1475 /* We prefers register and simple consts. */
1476 sljit_s32 dst_reg;
1477 sljit_s32 src1_reg;
1478 sljit_s32 src2_reg;
1479 sljit_s32 flags = HAS_FLAGS(op) ? SET_FLAGS : 0;
1480
1481 /* Destination check. */
1482 if (SLJIT_UNLIKELY(dst == SLJIT_UNUSED))
1483 flags |= UNUSED_RETURN;
1484
1485 SLJIT_ASSERT(!(inp_flags & ALLOW_INV_IMM) || (inp_flags & ALLOW_IMM));
1486
1487 src2_reg = 0;
1488
1489 do {
1490 if (!(inp_flags & ALLOW_IMM))
1491 break;
1492
1493 if (src2 & SLJIT_IMM) {
1494 src2_reg = get_imm(src2w);
1495 if (src2_reg)
1496 break;
1497 if (inp_flags & ALLOW_INV_IMM) {
1498 src2_reg = get_imm(~src2w);
1499 if (src2_reg) {
1500 flags |= INV_IMM;
1501 break;
1502 }
1503 }
1504 if (GET_OPCODE(op) == SLJIT_ADD) {
1505 src2_reg = get_imm(-src2w);
1506 if (src2_reg) {
1507 op = SLJIT_SUB | GET_ALL_FLAGS(op);
1508 break;
1509 }
1510 }
1511 if (GET_OPCODE(op) == SLJIT_SUB) {
1512 src2_reg = get_imm(-src2w);
1513 if (src2_reg) {
1514 op = SLJIT_ADD | GET_ALL_FLAGS(op);
1515 break;
1516 }
1517 }
1518 }
1519
1520 if (src1 & SLJIT_IMM) {
1521 src2_reg = get_imm(src1w);
1522 if (src2_reg) {
1523 flags |= ARGS_SWAPPED;
1524 src1 = src2;
1525 src1w = src2w;
1526 break;
1527 }
1528 if (inp_flags & ALLOW_INV_IMM) {
1529 src2_reg = get_imm(~src1w);
1530 if (src2_reg) {
1531 flags |= ARGS_SWAPPED | INV_IMM;
1532 src1 = src2;
1533 src1w = src2w;
1534 break;
1535 }
1536 }
1537 if (GET_OPCODE(op) == SLJIT_ADD) {
1538 src2_reg = get_imm(-src1w);
1539 if (src2_reg) {
1540 /* Note: add is commutative operation. */
1541 src1 = src2;
1542 src1w = src2w;
1543 op = SLJIT_SUB | GET_ALL_FLAGS(op);
1544 break;
1545 }
1546 }
1547 }
1548 } while(0);
1549
1550 /* Source 1. */
1551 if (FAST_IS_REG(src1))
1552 src1_reg = src1;
1553 else if (src1 & SLJIT_MEM) {
1554 FAIL_IF(emit_op_mem(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, TMP_REG1));
1555 src1_reg = TMP_REG1;
1556 }
1557 else {
1558 FAIL_IF(load_immediate(compiler, TMP_REG1, src1w));
1559 src1_reg = TMP_REG1;
1560 }
1561
1562 /* Destination. */
1563 dst_reg = SLOW_IS_REG(dst) ? dst : TMP_REG2;
1564
1565 if (op <= SLJIT_MOV_P) {
1566 if (dst & SLJIT_MEM) {
1567 if (inp_flags & BYTE_SIZE)
1568 inp_flags &= ~SIGNED;
1569
1570 if (FAST_IS_REG(src2))
1571 return emit_op_mem(compiler, inp_flags, src2, dst, dstw, TMP_REG2);
1572 }
1573
1574 if (FAST_IS_REG(src2) && dst_reg != TMP_REG2)
1575 flags |= MOVE_REG_CONV;
1576 }
1577
1578 /* Source 2. */
1579 if (src2_reg == 0) {
1580 src2_reg = (op <= SLJIT_MOV_P) ? dst_reg : TMP_REG2;
1581
1582 if (FAST_IS_REG(src2))
1583 src2_reg = src2;
1584 else if (src2 & SLJIT_MEM)
1585 FAIL_IF(emit_op_mem(compiler, inp_flags | LOAD_DATA, src2_reg, src2, src2w, TMP_REG2));
1586 else
1587 FAIL_IF(load_immediate(compiler, src2_reg, src2w));
1588 }
1589
1590 FAIL_IF(emit_single_op(compiler, op, flags, dst_reg, src1_reg, src2_reg));
1591
1592 if (!(dst & SLJIT_MEM))
1593 return SLJIT_SUCCESS;
1594
1595 return emit_op_mem(compiler, inp_flags, dst_reg, dst, dstw, TMP_REG1);
1596 }
1597
1598 #ifdef __cplusplus
1599 extern "C" {
1600 #endif
1601
1602 #if defined(__GNUC__)
1603 extern unsigned int __aeabi_uidivmod(unsigned int numerator, unsigned int denominator);
1604 extern int __aeabi_idivmod(int numerator, int denominator);
1605 #else
1606 #error "Software divmod functions are needed"
1607 #endif
1608
1609 #ifdef __cplusplus
1610 }
1611 #endif
1612
sljit_emit_op0(struct sljit_compiler * compiler,sljit_s32 op)1613 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op0(struct sljit_compiler *compiler, sljit_s32 op)
1614 {
1615 sljit_sw saved_reg_list[3];
1616 sljit_sw saved_reg_count;
1617
1618 CHECK_ERROR();
1619 CHECK(check_sljit_emit_op0(compiler, op));
1620
1621 op = GET_OPCODE(op);
1622 switch (op) {
1623 case SLJIT_BREAKPOINT:
1624 FAIL_IF(push_inst(compiler, BKPT));
1625 break;
1626 case SLJIT_NOP:
1627 FAIL_IF(push_inst(compiler, NOP));
1628 break;
1629 case SLJIT_LMUL_UW:
1630 case SLJIT_LMUL_SW:
1631 return push_inst(compiler, (op == SLJIT_LMUL_UW ? UMULL : SMULL)
1632 | (reg_map[SLJIT_R1] << 16)
1633 | (reg_map[SLJIT_R0] << 12)
1634 | (reg_map[SLJIT_R0] << 8)
1635 | reg_map[SLJIT_R1]);
1636 case SLJIT_DIVMOD_UW:
1637 case SLJIT_DIVMOD_SW:
1638 case SLJIT_DIV_UW:
1639 case SLJIT_DIV_SW:
1640 SLJIT_COMPILE_ASSERT((SLJIT_DIVMOD_UW & 0x2) == 0 && SLJIT_DIV_UW - 0x2 == SLJIT_DIVMOD_UW, bad_div_opcode_assignments);
1641 SLJIT_ASSERT(reg_map[2] == 1 && reg_map[3] == 2 && reg_map[4] == 3);
1642
1643 saved_reg_count = 0;
1644 if (compiler->scratches >= 4)
1645 saved_reg_list[saved_reg_count++] = 3;
1646 if (compiler->scratches >= 3)
1647 saved_reg_list[saved_reg_count++] = 2;
1648 if (op >= SLJIT_DIV_UW)
1649 saved_reg_list[saved_reg_count++] = 1;
1650
1651 if (saved_reg_count > 0) {
1652 FAIL_IF(push_inst(compiler, 0xe52d0000 | (saved_reg_count >= 3 ? 16 : 8)
1653 | (saved_reg_list[0] << 12) /* str rX, [sp, #-8/-16]! */));
1654 if (saved_reg_count >= 2) {
1655 SLJIT_ASSERT(saved_reg_list[1] < 8);
1656 FAIL_IF(push_inst(compiler, 0xe58d0004 | (saved_reg_list[1] << 12) /* str rX, [sp, #4] */));
1657 }
1658 if (saved_reg_count >= 3) {
1659 SLJIT_ASSERT(saved_reg_list[2] < 8);
1660 FAIL_IF(push_inst(compiler, 0xe58d0008 | (saved_reg_list[2] << 12) /* str rX, [sp, #8] */));
1661 }
1662 }
1663
1664 #if defined(__GNUC__)
1665 FAIL_IF(sljit_emit_ijump(compiler, SLJIT_FAST_CALL, SLJIT_IMM,
1666 ((op | 0x2) == SLJIT_DIV_UW ? SLJIT_FUNC_OFFSET(__aeabi_uidivmod) : SLJIT_FUNC_OFFSET(__aeabi_idivmod))));
1667 #else
1668 #error "Software divmod functions are needed"
1669 #endif
1670
1671 if (saved_reg_count > 0) {
1672 if (saved_reg_count >= 3) {
1673 SLJIT_ASSERT(saved_reg_list[2] < 8);
1674 FAIL_IF(push_inst(compiler, 0xe59d0008 | (saved_reg_list[2] << 12) /* ldr rX, [sp, #8] */));
1675 }
1676 if (saved_reg_count >= 2) {
1677 SLJIT_ASSERT(saved_reg_list[1] < 8);
1678 FAIL_IF(push_inst(compiler, 0xe59d0004 | (saved_reg_list[1] << 12) /* ldr rX, [sp, #4] */));
1679 }
1680 return push_inst(compiler, 0xe49d0000 | (saved_reg_count >= 3 ? 16 : 8)
1681 | (saved_reg_list[0] << 12) /* ldr rX, [sp], #8/16 */);
1682 }
1683 return SLJIT_SUCCESS;
1684 case SLJIT_ENDBR:
1685 case SLJIT_SKIP_FRAMES_BEFORE_RETURN:
1686 return SLJIT_SUCCESS;
1687 }
1688
1689 return SLJIT_SUCCESS;
1690 }
1691
sljit_emit_op1(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1692 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op1(struct sljit_compiler *compiler, sljit_s32 op,
1693 sljit_s32 dst, sljit_sw dstw,
1694 sljit_s32 src, sljit_sw srcw)
1695 {
1696 CHECK_ERROR();
1697 CHECK(check_sljit_emit_op1(compiler, op, dst, dstw, src, srcw));
1698 ADJUST_LOCAL_OFFSET(dst, dstw);
1699 ADJUST_LOCAL_OFFSET(src, srcw);
1700
1701 switch (GET_OPCODE(op)) {
1702 case SLJIT_MOV:
1703 case SLJIT_MOV_U32:
1704 case SLJIT_MOV_S32:
1705 case SLJIT_MOV_P:
1706 return emit_op(compiler, SLJIT_MOV, ALLOW_ANY_IMM, dst, dstw, TMP_REG1, 0, src, srcw);
1707
1708 case SLJIT_MOV_U8:
1709 return emit_op(compiler, SLJIT_MOV_U8, ALLOW_ANY_IMM | BYTE_SIZE, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_u8)srcw : srcw);
1710
1711 case SLJIT_MOV_S8:
1712 return emit_op(compiler, SLJIT_MOV_S8, ALLOW_ANY_IMM | SIGNED | BYTE_SIZE, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_s8)srcw : srcw);
1713
1714 case SLJIT_MOV_U16:
1715 return emit_op(compiler, SLJIT_MOV_U16, ALLOW_ANY_IMM | HALF_SIZE, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_u16)srcw : srcw);
1716
1717 case SLJIT_MOV_S16:
1718 return emit_op(compiler, SLJIT_MOV_S16, ALLOW_ANY_IMM | SIGNED | HALF_SIZE, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_s16)srcw : srcw);
1719
1720 case SLJIT_NOT:
1721 return emit_op(compiler, op, ALLOW_ANY_IMM, dst, dstw, TMP_REG1, 0, src, srcw);
1722
1723 case SLJIT_NEG:
1724 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
1725 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
1726 compiler->skip_checks = 1;
1727 #endif
1728 return sljit_emit_op2(compiler, SLJIT_SUB | GET_ALL_FLAGS(op), dst, dstw, SLJIT_IMM, 0, src, srcw);
1729
1730 case SLJIT_CLZ:
1731 return emit_op(compiler, op, 0, dst, dstw, TMP_REG1, 0, src, srcw);
1732 }
1733
1734 return SLJIT_SUCCESS;
1735 }
1736
sljit_emit_op2(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src1,sljit_sw src1w,sljit_s32 src2,sljit_sw src2w)1737 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op2(struct sljit_compiler *compiler, sljit_s32 op,
1738 sljit_s32 dst, sljit_sw dstw,
1739 sljit_s32 src1, sljit_sw src1w,
1740 sljit_s32 src2, sljit_sw src2w)
1741 {
1742 CHECK_ERROR();
1743 CHECK(check_sljit_emit_op2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1744 ADJUST_LOCAL_OFFSET(dst, dstw);
1745 ADJUST_LOCAL_OFFSET(src1, src1w);
1746 ADJUST_LOCAL_OFFSET(src2, src2w);
1747
1748 if (dst == SLJIT_UNUSED && !HAS_FLAGS(op))
1749 return SLJIT_SUCCESS;
1750
1751 switch (GET_OPCODE(op)) {
1752 case SLJIT_ADD:
1753 case SLJIT_ADDC:
1754 case SLJIT_SUB:
1755 case SLJIT_SUBC:
1756 case SLJIT_OR:
1757 case SLJIT_XOR:
1758 return emit_op(compiler, op, ALLOW_IMM, dst, dstw, src1, src1w, src2, src2w);
1759
1760 case SLJIT_MUL:
1761 return emit_op(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w);
1762
1763 case SLJIT_AND:
1764 return emit_op(compiler, op, ALLOW_ANY_IMM, dst, dstw, src1, src1w, src2, src2w);
1765
1766 case SLJIT_SHL:
1767 case SLJIT_LSHR:
1768 case SLJIT_ASHR:
1769 if (src2 & SLJIT_IMM) {
1770 compiler->shift_imm = src2w & 0x1f;
1771 return emit_op(compiler, op, 0, dst, dstw, TMP_REG1, 0, src1, src1w);
1772 }
1773 else {
1774 compiler->shift_imm = 0x20;
1775 return emit_op(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w);
1776 }
1777 }
1778
1779 return SLJIT_SUCCESS;
1780 }
1781
sljit_emit_op_src(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src,sljit_sw srcw)1782 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_src(struct sljit_compiler *compiler, sljit_s32 op,
1783 sljit_s32 src, sljit_sw srcw)
1784 {
1785 CHECK_ERROR();
1786 CHECK(check_sljit_emit_op_src(compiler, op, src, srcw));
1787 ADJUST_LOCAL_OFFSET(src, srcw);
1788
1789 switch (op) {
1790 case SLJIT_FAST_RETURN:
1791 SLJIT_ASSERT(reg_map[TMP_REG2] == 14);
1792
1793 if (FAST_IS_REG(src))
1794 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG2) | RM(src)));
1795 else
1796 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG2, src, srcw, TMP_REG1));
1797
1798 return push_inst(compiler, BX | RM(TMP_REG2));
1799 case SLJIT_SKIP_FRAMES_BEFORE_FAST_RETURN:
1800 return SLJIT_SUCCESS;
1801 case SLJIT_PREFETCH_L1:
1802 case SLJIT_PREFETCH_L2:
1803 case SLJIT_PREFETCH_L3:
1804 case SLJIT_PREFETCH_ONCE:
1805 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
1806 SLJIT_ASSERT(src & SLJIT_MEM);
1807 return emit_op_mem(compiler, PRELOAD | LOAD_DATA, TMP_PC, src, srcw, TMP_REG1);
1808 #else /* !SLJIT_CONFIG_ARM_V7 */
1809 return SLJIT_SUCCESS;
1810 #endif /* SLJIT_CONFIG_ARM_V7 */
1811 }
1812
1813 return SLJIT_SUCCESS;
1814 }
1815
sljit_get_register_index(sljit_s32 reg)1816 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_register_index(sljit_s32 reg)
1817 {
1818 CHECK_REG_INDEX(check_sljit_get_register_index(reg));
1819 return reg_map[reg];
1820 }
1821
sljit_get_float_register_index(sljit_s32 reg)1822 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_float_register_index(sljit_s32 reg)
1823 {
1824 CHECK_REG_INDEX(check_sljit_get_float_register_index(reg));
1825 return (freg_map[reg] << 1);
1826 }
1827
sljit_emit_op_custom(struct sljit_compiler * compiler,void * instruction,sljit_s32 size)1828 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_custom(struct sljit_compiler *compiler,
1829 void *instruction, sljit_s32 size)
1830 {
1831 CHECK_ERROR();
1832 CHECK(check_sljit_emit_op_custom(compiler, instruction, size));
1833
1834 return push_inst(compiler, *(sljit_uw*)instruction);
1835 }
1836
1837 /* --------------------------------------------------------------------- */
1838 /* Floating point operators */
1839 /* --------------------------------------------------------------------- */
1840
1841
1842 #define FPU_LOAD (1 << 20)
1843 #define EMIT_FPU_DATA_TRANSFER(inst, add, base, freg, offs) \
1844 ((inst) | ((add) << 23) | (reg_map[base] << 16) | (freg_map[freg] << 12) | (offs))
1845 #define EMIT_FPU_OPERATION(opcode, mode, dst, src1, src2) \
1846 ((opcode) | (mode) | (freg_map[dst] << 12) | freg_map[src1] | (freg_map[src2] << 16))
1847
emit_fop_mem(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 reg,sljit_s32 arg,sljit_sw argw)1848 static sljit_s32 emit_fop_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg, sljit_s32 arg, sljit_sw argw)
1849 {
1850 sljit_uw imm;
1851 sljit_sw inst = VSTR_F32 | (flags & (SLJIT_F32_OP | FPU_LOAD));
1852
1853 SLJIT_ASSERT(arg & SLJIT_MEM);
1854 arg &= ~SLJIT_MEM;
1855
1856 if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
1857 FAIL_IF(push_inst(compiler, ADD | RD(TMP_REG2) | RN(arg & REG_MASK) | RM(OFFS_REG(arg)) | ((argw & 0x3) << 7)));
1858 arg = TMP_REG2;
1859 argw = 0;
1860 }
1861
1862 /* Fast loads and stores. */
1863 if (arg) {
1864 if (!(argw & ~0x3fc))
1865 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, arg & REG_MASK, reg, argw >> 2));
1866 if (!(-argw & ~0x3fc))
1867 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, arg & REG_MASK, reg, (-argw) >> 2));
1868
1869 imm = get_imm(argw & ~0x3fc);
1870 if (imm) {
1871 FAIL_IF(push_inst(compiler, ADD | RD(TMP_REG2) | RN(arg & REG_MASK) | imm));
1872 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG2, reg, (argw & 0x3fc) >> 2));
1873 }
1874 imm = get_imm(-argw & ~0x3fc);
1875 if (imm) {
1876 argw = -argw;
1877 FAIL_IF(push_inst(compiler, SUB | RD(TMP_REG2) | RN(arg & REG_MASK) | imm));
1878 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, TMP_REG2, reg, (argw & 0x3fc) >> 2));
1879 }
1880 }
1881
1882 if (arg) {
1883 FAIL_IF(load_immediate(compiler, TMP_REG2, argw));
1884 FAIL_IF(push_inst(compiler, ADD | RD(TMP_REG2) | RN(arg & REG_MASK) | RM(TMP_REG2)));
1885 }
1886 else
1887 FAIL_IF(load_immediate(compiler, TMP_REG2, argw));
1888
1889 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG2, reg, 0));
1890 }
1891
sljit_emit_fop1_conv_sw_from_f64(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1892 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_sw_from_f64(struct sljit_compiler *compiler, sljit_s32 op,
1893 sljit_s32 dst, sljit_sw dstw,
1894 sljit_s32 src, sljit_sw srcw)
1895 {
1896 op ^= SLJIT_F32_OP;
1897
1898 if (src & SLJIT_MEM) {
1899 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src, srcw));
1900 src = TMP_FREG1;
1901 }
1902
1903 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_S32_F32, op & SLJIT_F32_OP, TMP_FREG1, src, 0)));
1904
1905 if (FAST_IS_REG(dst))
1906 return push_inst(compiler, VMOV | (1 << 20) | RD(dst) | (freg_map[TMP_FREG1] << 16));
1907
1908 /* Store the integer value from a VFP register. */
1909 return emit_fop_mem(compiler, 0, TMP_FREG1, dst, dstw);
1910 }
1911
sljit_emit_fop1_conv_f64_from_sw(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1912 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_f64_from_sw(struct sljit_compiler *compiler, sljit_s32 op,
1913 sljit_s32 dst, sljit_sw dstw,
1914 sljit_s32 src, sljit_sw srcw)
1915 {
1916 sljit_s32 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1917
1918 op ^= SLJIT_F32_OP;
1919
1920 if (FAST_IS_REG(src))
1921 FAIL_IF(push_inst(compiler, VMOV | RD(src) | (freg_map[TMP_FREG1] << 16)));
1922 else if (src & SLJIT_MEM) {
1923 /* Load the integer value into a VFP register. */
1924 FAIL_IF(emit_fop_mem(compiler, FPU_LOAD, TMP_FREG1, src, srcw));
1925 }
1926 else {
1927 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
1928 FAIL_IF(push_inst(compiler, VMOV | RD(TMP_REG1) | (freg_map[TMP_FREG1] << 16)));
1929 }
1930
1931 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_F32_S32, op & SLJIT_F32_OP, dst_r, TMP_FREG1, 0)));
1932
1933 if (dst & SLJIT_MEM)
1934 return emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw);
1935 return SLJIT_SUCCESS;
1936 }
1937
sljit_emit_fop1_cmp(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src1,sljit_sw src1w,sljit_s32 src2,sljit_sw src2w)1938 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_cmp(struct sljit_compiler *compiler, sljit_s32 op,
1939 sljit_s32 src1, sljit_sw src1w,
1940 sljit_s32 src2, sljit_sw src2w)
1941 {
1942 op ^= SLJIT_F32_OP;
1943
1944 if (src1 & SLJIT_MEM) {
1945 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w));
1946 src1 = TMP_FREG1;
1947 }
1948
1949 if (src2 & SLJIT_MEM) {
1950 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w));
1951 src2 = TMP_FREG2;
1952 }
1953
1954 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCMP_F32, op & SLJIT_F32_OP, src1, src2, 0)));
1955 return push_inst(compiler, VMRS);
1956 }
1957
sljit_emit_fop1(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1958 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop1(struct sljit_compiler *compiler, sljit_s32 op,
1959 sljit_s32 dst, sljit_sw dstw,
1960 sljit_s32 src, sljit_sw srcw)
1961 {
1962 sljit_s32 dst_r;
1963
1964 CHECK_ERROR();
1965
1966 SLJIT_COMPILE_ASSERT((SLJIT_F32_OP == 0x100), float_transfer_bit_error);
1967 SELECT_FOP1_OPERATION_WITH_CHECKS(compiler, op, dst, dstw, src, srcw);
1968
1969 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1970
1971 if (GET_OPCODE(op) != SLJIT_CONV_F64_FROM_F32)
1972 op ^= SLJIT_F32_OP;
1973
1974 if (src & SLJIT_MEM) {
1975 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, dst_r, src, srcw));
1976 src = dst_r;
1977 }
1978
1979 switch (GET_OPCODE(op)) {
1980 case SLJIT_MOV_F64:
1981 if (src != dst_r) {
1982 if (dst_r != TMP_FREG1)
1983 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMOV_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1984 else
1985 dst_r = src;
1986 }
1987 break;
1988 case SLJIT_NEG_F64:
1989 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VNEG_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1990 break;
1991 case SLJIT_ABS_F64:
1992 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VABS_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1993 break;
1994 case SLJIT_CONV_F64_FROM_F32:
1995 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_F64_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1996 op ^= SLJIT_F32_OP;
1997 break;
1998 }
1999
2000 if (dst & SLJIT_MEM)
2001 return emit_fop_mem(compiler, (op & SLJIT_F32_OP), dst_r, dst, dstw);
2002 return SLJIT_SUCCESS;
2003 }
2004
sljit_emit_fop2(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src1,sljit_sw src1w,sljit_s32 src2,sljit_sw src2w)2005 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop2(struct sljit_compiler *compiler, sljit_s32 op,
2006 sljit_s32 dst, sljit_sw dstw,
2007 sljit_s32 src1, sljit_sw src1w,
2008 sljit_s32 src2, sljit_sw src2w)
2009 {
2010 sljit_s32 dst_r;
2011
2012 CHECK_ERROR();
2013 CHECK(check_sljit_emit_fop2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
2014 ADJUST_LOCAL_OFFSET(dst, dstw);
2015 ADJUST_LOCAL_OFFSET(src1, src1w);
2016 ADJUST_LOCAL_OFFSET(src2, src2w);
2017
2018 op ^= SLJIT_F32_OP;
2019
2020 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
2021
2022 if (src2 & SLJIT_MEM) {
2023 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w));
2024 src2 = TMP_FREG2;
2025 }
2026
2027 if (src1 & SLJIT_MEM) {
2028 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w));
2029 src1 = TMP_FREG1;
2030 }
2031
2032 switch (GET_OPCODE(op)) {
2033 case SLJIT_ADD_F64:
2034 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VADD_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2035 break;
2036
2037 case SLJIT_SUB_F64:
2038 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VSUB_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2039 break;
2040
2041 case SLJIT_MUL_F64:
2042 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMUL_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2043 break;
2044
2045 case SLJIT_DIV_F64:
2046 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VDIV_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2047 break;
2048 }
2049
2050 if (dst_r == TMP_FREG1)
2051 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw));
2052
2053 return SLJIT_SUCCESS;
2054 }
2055
2056 #undef FPU_LOAD
2057 #undef EMIT_FPU_DATA_TRANSFER
2058
2059 /* --------------------------------------------------------------------- */
2060 /* Other instructions */
2061 /* --------------------------------------------------------------------- */
2062
sljit_emit_fast_enter(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw)2063 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
2064 {
2065 CHECK_ERROR();
2066 CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
2067 ADJUST_LOCAL_OFFSET(dst, dstw);
2068
2069 SLJIT_ASSERT(reg_map[TMP_REG2] == 14);
2070
2071 if (FAST_IS_REG(dst))
2072 return push_inst(compiler, MOV | RD(dst) | RM(TMP_REG2));
2073
2074 /* Memory. */
2075 return emit_op_mem(compiler, WORD_SIZE, TMP_REG2, dst, dstw, TMP_REG1);
2076 }
2077
2078 /* --------------------------------------------------------------------- */
2079 /* Conditional instructions */
2080 /* --------------------------------------------------------------------- */
2081
get_cc(sljit_s32 type)2082 static sljit_uw get_cc(sljit_s32 type)
2083 {
2084 switch (type) {
2085 case SLJIT_EQUAL:
2086 case SLJIT_MUL_NOT_OVERFLOW:
2087 case SLJIT_EQUAL_F64:
2088 return 0x00000000;
2089
2090 case SLJIT_NOT_EQUAL:
2091 case SLJIT_MUL_OVERFLOW:
2092 case SLJIT_NOT_EQUAL_F64:
2093 return 0x10000000;
2094
2095 case SLJIT_LESS:
2096 case SLJIT_LESS_F64:
2097 return 0x30000000;
2098
2099 case SLJIT_GREATER_EQUAL:
2100 case SLJIT_GREATER_EQUAL_F64:
2101 return 0x20000000;
2102
2103 case SLJIT_GREATER:
2104 case SLJIT_GREATER_F64:
2105 return 0x80000000;
2106
2107 case SLJIT_LESS_EQUAL:
2108 case SLJIT_LESS_EQUAL_F64:
2109 return 0x90000000;
2110
2111 case SLJIT_SIG_LESS:
2112 return 0xb0000000;
2113
2114 case SLJIT_SIG_GREATER_EQUAL:
2115 return 0xa0000000;
2116
2117 case SLJIT_SIG_GREATER:
2118 return 0xc0000000;
2119
2120 case SLJIT_SIG_LESS_EQUAL:
2121 return 0xd0000000;
2122
2123 case SLJIT_OVERFLOW:
2124 case SLJIT_UNORDERED_F64:
2125 return 0x60000000;
2126
2127 case SLJIT_NOT_OVERFLOW:
2128 case SLJIT_ORDERED_F64:
2129 return 0x70000000;
2130
2131 default:
2132 SLJIT_ASSERT(type >= SLJIT_JUMP && type <= SLJIT_CALL_CDECL);
2133 return 0xe0000000;
2134 }
2135 }
2136
sljit_emit_label(struct sljit_compiler * compiler)2137 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler)
2138 {
2139 struct sljit_label *label;
2140
2141 CHECK_ERROR_PTR();
2142 CHECK_PTR(check_sljit_emit_label(compiler));
2143
2144 if (compiler->last_label && compiler->last_label->size == compiler->size)
2145 return compiler->last_label;
2146
2147 label = (struct sljit_label*)ensure_abuf(compiler, sizeof(struct sljit_label));
2148 PTR_FAIL_IF(!label);
2149 set_label(label, compiler);
2150 return label;
2151 }
2152
sljit_emit_jump(struct sljit_compiler * compiler,sljit_s32 type)2153 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, sljit_s32 type)
2154 {
2155 struct sljit_jump *jump;
2156
2157 CHECK_ERROR_PTR();
2158 CHECK_PTR(check_sljit_emit_jump(compiler, type));
2159
2160 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
2161 PTR_FAIL_IF(!jump);
2162 set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
2163 type &= 0xff;
2164
2165 SLJIT_ASSERT(reg_map[TMP_REG1] != 14);
2166
2167 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2168 if (type >= SLJIT_FAST_CALL)
2169 PTR_FAIL_IF(prepare_blx(compiler));
2170 PTR_FAIL_IF(push_inst_with_unique_literal(compiler, ((EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1,
2171 type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, TMP_PC, 0)) & ~COND_MASK) | get_cc(type), 0));
2172
2173 if (jump->flags & SLJIT_REWRITABLE_JUMP) {
2174 jump->addr = compiler->size;
2175 compiler->patches++;
2176 }
2177
2178 if (type >= SLJIT_FAST_CALL) {
2179 jump->flags |= IS_BL;
2180 PTR_FAIL_IF(emit_blx(compiler));
2181 }
2182
2183 if (!(jump->flags & SLJIT_REWRITABLE_JUMP))
2184 jump->addr = compiler->size;
2185 #else
2186 if (type >= SLJIT_FAST_CALL)
2187 jump->flags |= IS_BL;
2188 PTR_FAIL_IF(emit_imm(compiler, TMP_REG1, 0));
2189 PTR_FAIL_IF(push_inst(compiler, (((type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1)) & ~COND_MASK) | get_cc(type)));
2190 jump->addr = compiler->size;
2191 #endif
2192 return jump;
2193 }
2194
2195 #ifdef __SOFTFP__
2196
softfloat_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types,sljit_s32 * src)2197 static sljit_s32 softfloat_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src)
2198 {
2199 sljit_s32 stack_offset = 0;
2200 sljit_s32 arg_count = 0;
2201 sljit_s32 word_arg_offset = 0;
2202 sljit_s32 float_arg_count = 0;
2203 sljit_s32 types = 0;
2204 sljit_s32 src_offset = 4 * sizeof(sljit_sw);
2205 sljit_u8 offsets[4];
2206
2207 if (src && FAST_IS_REG(*src))
2208 src_offset = reg_map[*src] * sizeof(sljit_sw);
2209
2210 arg_types >>= SLJIT_DEF_SHIFT;
2211
2212 while (arg_types) {
2213 types = (types << SLJIT_DEF_SHIFT) | (arg_types & SLJIT_DEF_MASK);
2214
2215 switch (arg_types & SLJIT_DEF_MASK) {
2216 case SLJIT_ARG_TYPE_F32:
2217 offsets[arg_count] = (sljit_u8)stack_offset;
2218 stack_offset += sizeof(sljit_f32);
2219 arg_count++;
2220 float_arg_count++;
2221 break;
2222 case SLJIT_ARG_TYPE_F64:
2223 if (stack_offset & 0x7)
2224 stack_offset += sizeof(sljit_sw);
2225 offsets[arg_count] = (sljit_u8)stack_offset;
2226 stack_offset += sizeof(sljit_f64);
2227 arg_count++;
2228 float_arg_count++;
2229 break;
2230 default:
2231 offsets[arg_count] = (sljit_u8)stack_offset;
2232 stack_offset += sizeof(sljit_sw);
2233 arg_count++;
2234 word_arg_offset += sizeof(sljit_sw);
2235 break;
2236 }
2237
2238 arg_types >>= SLJIT_DEF_SHIFT;
2239 }
2240
2241 if (stack_offset > 16)
2242 FAIL_IF(push_inst(compiler, SUB | RD(SLJIT_SP) | RN(SLJIT_SP) | SRC2_IMM | (((stack_offset - 16) + 0x7) & ~0x7)));
2243
2244 /* Process arguments in reversed direction. */
2245 while (types) {
2246 switch (types & SLJIT_DEF_MASK) {
2247 case SLJIT_ARG_TYPE_F32:
2248 arg_count--;
2249 float_arg_count--;
2250 stack_offset = offsets[arg_count];
2251
2252 if (stack_offset < 16) {
2253 if (src_offset == stack_offset) {
2254 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG1) | (src_offset >> 2)));
2255 *src = TMP_REG1;
2256 }
2257 FAIL_IF(push_inst(compiler, VMOV | 0x100000 | (float_arg_count << 16) | (stack_offset << 10)));
2258 } else
2259 FAIL_IF(push_inst(compiler, VSTR_F32 | 0x800000 | RN(SLJIT_SP) | (float_arg_count << 12) | ((stack_offset - 16) >> 2)));
2260 break;
2261 case SLJIT_ARG_TYPE_F64:
2262 arg_count--;
2263 float_arg_count--;
2264 stack_offset = offsets[arg_count];
2265
2266 SLJIT_ASSERT((stack_offset & 0x7) == 0);
2267
2268 if (stack_offset < 16) {
2269 if (src_offset == stack_offset || src_offset == stack_offset + sizeof(sljit_sw)) {
2270 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG1) | (src_offset >> 2)));
2271 *src = TMP_REG1;
2272 }
2273 FAIL_IF(push_inst(compiler, VMOV2 | 0x100000 | (stack_offset << 10) | ((stack_offset + sizeof(sljit_sw)) << 14) | float_arg_count));
2274 } else
2275 FAIL_IF(push_inst(compiler, VSTR_F32 | 0x800100 | RN(SLJIT_SP) | (float_arg_count << 12) | ((stack_offset - 16) >> 2)));
2276 break;
2277 default:
2278 arg_count--;
2279 word_arg_offset -= sizeof(sljit_sw);
2280 stack_offset = offsets[arg_count];
2281
2282 SLJIT_ASSERT(stack_offset >= word_arg_offset);
2283
2284 if (stack_offset != word_arg_offset) {
2285 if (stack_offset < 16) {
2286 if (src_offset == stack_offset) {
2287 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG1) | (src_offset >> 2)));
2288 *src = TMP_REG1;
2289 }
2290 else if (src_offset == word_arg_offset) {
2291 *src = 1 + (stack_offset >> 2);
2292 src_offset = stack_offset;
2293 }
2294 FAIL_IF(push_inst(compiler, MOV | (stack_offset << 10) | (word_arg_offset >> 2)));
2295 } else
2296 FAIL_IF(push_inst(compiler, data_transfer_insts[WORD_SIZE] | 0x800000 | RN(SLJIT_SP) | (word_arg_offset << 10) | (stack_offset - 16)));
2297 }
2298 break;
2299 }
2300
2301 types >>= SLJIT_DEF_SHIFT;
2302 }
2303
2304 return SLJIT_SUCCESS;
2305 }
2306
softfloat_post_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types)2307 static sljit_s32 softfloat_post_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
2308 {
2309 sljit_s32 stack_size = 0;
2310
2311 if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32)
2312 FAIL_IF(push_inst(compiler, VMOV | (0 << 16) | (0 << 12)));
2313 if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F64)
2314 FAIL_IF(push_inst(compiler, VMOV2 | (1 << 16) | (0 << 12) | 0));
2315
2316 arg_types >>= SLJIT_DEF_SHIFT;
2317
2318 while (arg_types) {
2319 switch (arg_types & SLJIT_DEF_MASK) {
2320 case SLJIT_ARG_TYPE_F32:
2321 stack_size += sizeof(sljit_f32);
2322 break;
2323 case SLJIT_ARG_TYPE_F64:
2324 if (stack_size & 0x7)
2325 stack_size += sizeof(sljit_sw);
2326 stack_size += sizeof(sljit_f64);
2327 break;
2328 default:
2329 stack_size += sizeof(sljit_sw);
2330 break;
2331 }
2332
2333 arg_types >>= SLJIT_DEF_SHIFT;
2334 }
2335
2336 if (stack_size <= 16)
2337 return SLJIT_SUCCESS;
2338
2339 return push_inst(compiler, ADD | RD(SLJIT_SP) | RN(SLJIT_SP) | SRC2_IMM | (((stack_size - 16) + 0x7) & ~0x7));
2340 }
2341
2342 #else /* !__SOFTFP__ */
2343
hardfloat_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types)2344 static sljit_s32 hardfloat_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
2345 {
2346 sljit_u32 remap = 0;
2347 sljit_u32 offset = 0;
2348 sljit_u32 new_offset, mask;
2349
2350 /* Remove return value. */
2351 arg_types >>= SLJIT_DEF_SHIFT;
2352
2353 while (arg_types) {
2354 if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32) {
2355 new_offset = 0;
2356 mask = 1;
2357
2358 while (remap & mask) {
2359 new_offset++;
2360 mask <<= 1;
2361 }
2362 remap |= mask;
2363
2364 if (offset != new_offset)
2365 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMOV_F32,
2366 0, (new_offset >> 1) + 1, (offset >> 1) + 1, 0) | ((new_offset & 0x1) ? 0x400000 : 0)));
2367
2368 offset += 2;
2369 }
2370 else if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F64) {
2371 new_offset = 0;
2372 mask = 3;
2373
2374 while (remap & mask) {
2375 new_offset += 2;
2376 mask <<= 2;
2377 }
2378 remap |= mask;
2379
2380 if (offset != new_offset)
2381 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMOV_F32, SLJIT_F32_OP, (new_offset >> 1) + 1, (offset >> 1) + 1, 0)));
2382
2383 offset += 2;
2384 }
2385 arg_types >>= SLJIT_DEF_SHIFT;
2386 }
2387
2388 return SLJIT_SUCCESS;
2389 }
2390
2391 #endif /* __SOFTFP__ */
2392
2393 #undef EMIT_FPU_OPERATION
2394
sljit_emit_call(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types)2395 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
2396 sljit_s32 arg_types)
2397 {
2398 #ifdef __SOFTFP__
2399 struct sljit_jump *jump;
2400 #endif
2401
2402 CHECK_ERROR_PTR();
2403 CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
2404
2405 #ifdef __SOFTFP__
2406 PTR_FAIL_IF(softfloat_call_with_args(compiler, arg_types, NULL));
2407
2408 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2409 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2410 compiler->skip_checks = 1;
2411 #endif
2412
2413 jump = sljit_emit_jump(compiler, type);
2414 PTR_FAIL_IF(jump == NULL);
2415
2416 PTR_FAIL_IF(softfloat_post_call_with_args(compiler, arg_types));
2417 return jump;
2418 #else /* !__SOFTFP__ */
2419 PTR_FAIL_IF(hardfloat_call_with_args(compiler, arg_types));
2420
2421 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2422 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2423 compiler->skip_checks = 1;
2424 #endif
2425
2426 return sljit_emit_jump(compiler, type);
2427 #endif /* __SOFTFP__ */
2428 }
2429
sljit_emit_ijump(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 src,sljit_sw srcw)2430 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_ijump(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 src, sljit_sw srcw)
2431 {
2432 struct sljit_jump *jump;
2433
2434 CHECK_ERROR();
2435 CHECK(check_sljit_emit_ijump(compiler, type, src, srcw));
2436 ADJUST_LOCAL_OFFSET(src, srcw);
2437
2438 SLJIT_ASSERT(reg_map[TMP_REG1] != 14);
2439
2440 if (!(src & SLJIT_IMM)) {
2441 if (FAST_IS_REG(src)) {
2442 SLJIT_ASSERT(reg_map[src] != 14);
2443 return push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(src));
2444 }
2445
2446 SLJIT_ASSERT(src & SLJIT_MEM);
2447 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG1, src, srcw, TMP_REG1));
2448 return push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1));
2449 }
2450
2451 /* These jumps are converted to jump/call instructions when possible. */
2452 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
2453 FAIL_IF(!jump);
2454 set_jump(jump, compiler, JUMP_ADDR | ((type >= SLJIT_FAST_CALL) ? IS_BL : 0));
2455 jump->u.target = srcw;
2456
2457 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2458 if (type >= SLJIT_FAST_CALL)
2459 FAIL_IF(prepare_blx(compiler));
2460 FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1, type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, TMP_PC, 0), 0));
2461 if (type >= SLJIT_FAST_CALL)
2462 FAIL_IF(emit_blx(compiler));
2463 #else
2464 FAIL_IF(emit_imm(compiler, TMP_REG1, 0));
2465 FAIL_IF(push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1)));
2466 #endif
2467 jump->addr = compiler->size;
2468 return SLJIT_SUCCESS;
2469 }
2470
sljit_emit_icall(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types,sljit_s32 src,sljit_sw srcw)2471 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
2472 sljit_s32 arg_types,
2473 sljit_s32 src, sljit_sw srcw)
2474 {
2475 CHECK_ERROR();
2476 CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
2477
2478 #ifdef __SOFTFP__
2479 if (src & SLJIT_MEM) {
2480 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG1, src, srcw, TMP_REG1));
2481 src = TMP_REG1;
2482 }
2483
2484 FAIL_IF(softfloat_call_with_args(compiler, arg_types, &src));
2485
2486 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2487 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2488 compiler->skip_checks = 1;
2489 #endif
2490
2491 FAIL_IF(sljit_emit_ijump(compiler, type, src, srcw));
2492
2493 return softfloat_post_call_with_args(compiler, arg_types);
2494 #else /* !__SOFTFP__ */
2495 FAIL_IF(hardfloat_call_with_args(compiler, arg_types));
2496
2497 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2498 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2499 compiler->skip_checks = 1;
2500 #endif
2501
2502 return sljit_emit_ijump(compiler, type, src, srcw);
2503 #endif /* __SOFTFP__ */
2504 }
2505
sljit_emit_op_flags(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 type)2506 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_flags(struct sljit_compiler *compiler, sljit_s32 op,
2507 sljit_s32 dst, sljit_sw dstw,
2508 sljit_s32 type)
2509 {
2510 sljit_s32 dst_reg, flags = GET_ALL_FLAGS(op);
2511 sljit_uw cc, ins;
2512
2513 CHECK_ERROR();
2514 CHECK(check_sljit_emit_op_flags(compiler, op, dst, dstw, type));
2515 ADJUST_LOCAL_OFFSET(dst, dstw);
2516
2517 op = GET_OPCODE(op);
2518 cc = get_cc(type & 0xff);
2519 dst_reg = FAST_IS_REG(dst) ? dst : TMP_REG1;
2520
2521 if (op < SLJIT_ADD) {
2522 FAIL_IF(push_inst(compiler, MOV | RD(dst_reg) | SRC2_IMM | 0));
2523 FAIL_IF(push_inst(compiler, ((MOV | RD(dst_reg) | SRC2_IMM | 1) & ~COND_MASK) | cc));
2524 if (dst & SLJIT_MEM)
2525 return emit_op_mem(compiler, WORD_SIZE, TMP_REG1, dst, dstw, TMP_REG2);
2526 return SLJIT_SUCCESS;
2527 }
2528
2529 ins = (op == SLJIT_AND ? AND : (op == SLJIT_OR ? ORR : EOR));
2530
2531 if (dst & SLJIT_MEM)
2532 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG1, dst, dstw, TMP_REG2));
2533
2534 FAIL_IF(push_inst(compiler, ((ins | RD(dst_reg) | RN(dst_reg) | SRC2_IMM | 1) & ~COND_MASK) | cc));
2535
2536 if (op == SLJIT_AND)
2537 FAIL_IF(push_inst(compiler, ((ins | RD(dst_reg) | RN(dst_reg) | SRC2_IMM | 0) & ~COND_MASK) | (cc ^ 0x10000000)));
2538
2539 if (dst & SLJIT_MEM)
2540 FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, dst, dstw, TMP_REG2));
2541
2542 if (flags & SLJIT_SET_Z)
2543 return push_inst(compiler, MOV | SET_FLAGS | RD(TMP_REG2) | RM(dst_reg));
2544 return SLJIT_SUCCESS;
2545 }
2546
sljit_emit_cmov(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 dst_reg,sljit_s32 src,sljit_sw srcw)2547 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_cmov(struct sljit_compiler *compiler, sljit_s32 type,
2548 sljit_s32 dst_reg,
2549 sljit_s32 src, sljit_sw srcw)
2550 {
2551 sljit_uw cc, tmp;
2552
2553 CHECK_ERROR();
2554 CHECK(check_sljit_emit_cmov(compiler, type, dst_reg, src, srcw));
2555
2556 dst_reg &= ~SLJIT_I32_OP;
2557
2558 cc = get_cc(type & 0xff);
2559
2560 if (SLJIT_UNLIKELY(src & SLJIT_IMM)) {
2561 tmp = get_imm(srcw);
2562 if (tmp)
2563 return push_inst(compiler, ((MOV | RD(dst_reg) | tmp) & ~COND_MASK) | cc);
2564
2565 tmp = get_imm(~srcw);
2566 if (tmp)
2567 return push_inst(compiler, ((MVN | RD(dst_reg) | tmp) & ~COND_MASK) | cc);
2568
2569 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
2570 tmp = (sljit_uw) srcw;
2571 FAIL_IF(push_inst(compiler, (MOVW & ~COND_MASK) | cc | RD(dst_reg) | ((tmp << 4) & 0xf0000) | (tmp & 0xfff)));
2572 if (tmp <= 0xffff)
2573 return SLJIT_SUCCESS;
2574 return push_inst(compiler, (MOVT & ~COND_MASK) | cc | RD(dst_reg) | ((tmp >> 12) & 0xf0000) | ((tmp >> 16) & 0xfff));
2575 #else
2576 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
2577 src = TMP_REG1;
2578 #endif
2579 }
2580
2581 return push_inst(compiler, ((MOV | RD(dst_reg) | RM(src)) & ~COND_MASK) | cc);
2582 }
2583
sljit_emit_mem(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 reg,sljit_s32 mem,sljit_sw memw)2584 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_mem(struct sljit_compiler *compiler, sljit_s32 type,
2585 sljit_s32 reg,
2586 sljit_s32 mem, sljit_sw memw)
2587 {
2588 sljit_s32 flags;
2589 sljit_uw is_type1_transfer, inst;
2590
2591 CHECK_ERROR();
2592 CHECK(check_sljit_emit_mem(compiler, type, reg, mem, memw));
2593
2594 is_type1_transfer = 1;
2595
2596 switch (type & 0xff) {
2597 case SLJIT_MOV:
2598 case SLJIT_MOV_U32:
2599 case SLJIT_MOV_S32:
2600 case SLJIT_MOV_P:
2601 flags = WORD_SIZE;
2602 break;
2603 case SLJIT_MOV_U8:
2604 flags = BYTE_SIZE;
2605 break;
2606 case SLJIT_MOV_S8:
2607 if (!(type & SLJIT_MEM_STORE))
2608 is_type1_transfer = 0;
2609 flags = BYTE_SIZE | SIGNED;
2610 break;
2611 case SLJIT_MOV_U16:
2612 is_type1_transfer = 0;
2613 flags = HALF_SIZE;
2614 break;
2615 case SLJIT_MOV_S16:
2616 is_type1_transfer = 0;
2617 flags = HALF_SIZE | SIGNED;
2618 break;
2619 default:
2620 SLJIT_UNREACHABLE();
2621 flags = WORD_SIZE;
2622 break;
2623 }
2624
2625 if (!(type & SLJIT_MEM_STORE))
2626 flags |= LOAD_DATA;
2627
2628 SLJIT_ASSERT(is_type1_transfer == !!IS_TYPE1_TRANSFER(flags));
2629
2630 if (SLJIT_UNLIKELY(mem & OFFS_REG_MASK)) {
2631 if (!is_type1_transfer && memw != 0)
2632 return SLJIT_ERR_UNSUPPORTED;
2633 }
2634 else {
2635 if (is_type1_transfer) {
2636 if (memw > 4095 || memw < -4095)
2637 return SLJIT_ERR_UNSUPPORTED;
2638 }
2639 else {
2640 if (memw > 255 || memw < -255)
2641 return SLJIT_ERR_UNSUPPORTED;
2642 }
2643 }
2644
2645 if (type & SLJIT_MEM_SUPP)
2646 return SLJIT_SUCCESS;
2647
2648 if (SLJIT_UNLIKELY(mem & OFFS_REG_MASK)) {
2649 memw &= 0x3;
2650
2651 inst = EMIT_DATA_TRANSFER(flags, 1, reg, mem & REG_MASK, RM(OFFS_REG(mem)) | (memw << 7));
2652
2653 if (is_type1_transfer)
2654 inst |= (1 << 25);
2655
2656 if (type & SLJIT_MEM_PRE)
2657 inst |= (1 << 21);
2658 else
2659 inst ^= (1 << 24);
2660
2661 return push_inst(compiler, inst);
2662 }
2663
2664 inst = EMIT_DATA_TRANSFER(flags, 0, reg, mem & REG_MASK, 0);
2665
2666 if (type & SLJIT_MEM_PRE)
2667 inst |= (1 << 21);
2668 else
2669 inst ^= (1 << 24);
2670
2671 if (is_type1_transfer) {
2672 if (memw >= 0)
2673 inst |= (1 << 23);
2674 else
2675 memw = -memw;
2676
2677 return push_inst(compiler, inst | memw);
2678 }
2679
2680 if (memw >= 0)
2681 inst |= (1 << 23);
2682 else
2683 memw = -memw;
2684
2685 return push_inst(compiler, inst | TYPE2_TRANSFER_IMM(memw));
2686 }
2687
sljit_emit_const(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw,sljit_sw init_value)2688 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw, sljit_sw init_value)
2689 {
2690 struct sljit_const *const_;
2691 sljit_s32 dst_r;
2692
2693 CHECK_ERROR_PTR();
2694 CHECK_PTR(check_sljit_emit_const(compiler, dst, dstw, init_value));
2695 ADJUST_LOCAL_OFFSET(dst, dstw);
2696
2697 dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG2;
2698
2699 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2700 PTR_FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1, dst_r, TMP_PC, 0), init_value));
2701 compiler->patches++;
2702 #else
2703 PTR_FAIL_IF(emit_imm(compiler, dst_r, init_value));
2704 #endif
2705
2706 const_ = (struct sljit_const*)ensure_abuf(compiler, sizeof(struct sljit_const));
2707 PTR_FAIL_IF(!const_);
2708 set_const(const_, compiler);
2709
2710 if (dst & SLJIT_MEM)
2711 PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG2, dst, dstw, TMP_REG1));
2712 return const_;
2713 }
2714
sljit_emit_put_label(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw)2715 SLJIT_API_FUNC_ATTRIBUTE struct sljit_put_label* sljit_emit_put_label(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
2716 {
2717 struct sljit_put_label *put_label;
2718 sljit_s32 dst_r;
2719
2720 CHECK_ERROR_PTR();
2721 CHECK_PTR(check_sljit_emit_put_label(compiler, dst, dstw));
2722 ADJUST_LOCAL_OFFSET(dst, dstw);
2723
2724 dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG2;
2725
2726 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2727 PTR_FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1, dst_r, TMP_PC, 0), 0));
2728 compiler->patches++;
2729 #else
2730 PTR_FAIL_IF(emit_imm(compiler, dst_r, 0));
2731 #endif
2732
2733 put_label = (struct sljit_put_label*)ensure_abuf(compiler, sizeof(struct sljit_put_label));
2734 PTR_FAIL_IF(!put_label);
2735 set_put_label(put_label, compiler, 0);
2736
2737 if (dst & SLJIT_MEM)
2738 PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG2, dst, dstw, TMP_REG1));
2739 return put_label;
2740 }
2741
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_target,sljit_sw executable_offset)2742 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
2743 {
2744 inline_set_jump_addr(addr, executable_offset, new_target, 1);
2745 }
2746
sljit_set_const(sljit_uw addr,sljit_sw new_constant,sljit_sw executable_offset)2747 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
2748 {
2749 inline_set_const(addr, executable_offset, new_constant, 1);
2750 }
2751
