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 return 1;
876
877 default:
878 return 0;
879 }
880 }
881
882 /* --------------------------------------------------------------------- */
883 /* Entry, exit */
884 /* --------------------------------------------------------------------- */
885
886 /* Creates an index in data_transfer_insts array. */
887 #define WORD_SIZE 0x00
888 #define BYTE_SIZE 0x01
889 #define HALF_SIZE 0x02
890 #define PRELOAD 0x03
891 #define SIGNED 0x04
892 #define LOAD_DATA 0x08
893
894 /* Flag bits for emit_op. */
895 #define ALLOW_IMM 0x10
896 #define ALLOW_INV_IMM 0x20
897 #define ALLOW_ANY_IMM (ALLOW_IMM | ALLOW_INV_IMM)
898
899 /* s/l - store/load (1 bit)
900 u/s - signed/unsigned (1 bit)
901 w/b/h/N - word/byte/half/NOT allowed (2 bit)
902 Storing signed and unsigned values are the same operations. */
903
904 static const sljit_uw data_transfer_insts[16] = {
905 /* s u w */ 0xe5000000 /* str */,
906 /* s u b */ 0xe5400000 /* strb */,
907 /* s u h */ 0xe10000b0 /* strh */,
908 /* s u N */ 0x00000000 /* not allowed */,
909 /* s s w */ 0xe5000000 /* str */,
910 /* s s b */ 0xe5400000 /* strb */,
911 /* s s h */ 0xe10000b0 /* strh */,
912 /* s s N */ 0x00000000 /* not allowed */,
913
914 /* l u w */ 0xe5100000 /* ldr */,
915 /* l u b */ 0xe5500000 /* ldrb */,
916 /* l u h */ 0xe11000b0 /* ldrh */,
917 /* l u p */ 0xf5500000 /* preload */,
918 /* l s w */ 0xe5100000 /* ldr */,
919 /* l s b */ 0xe11000d0 /* ldrsb */,
920 /* l s h */ 0xe11000f0 /* ldrsh */,
921 /* l s N */ 0x00000000 /* not allowed */,
922 };
923
924 #define EMIT_DATA_TRANSFER(type, add, target_reg, base_reg, arg) \
925 (data_transfer_insts[(type) & 0xf] | ((add) << 23) | RD(target_reg) | RN(base_reg) | (arg))
926
927 /* Normal ldr/str instruction.
928 Type2: ldrsb, ldrh, ldrsh */
929 #define IS_TYPE1_TRANSFER(type) \
930 (data_transfer_insts[(type) & 0xf] & 0x04000000)
931 #define TYPE2_TRANSFER_IMM(imm) \
932 (((imm) & 0xf) | (((imm) & 0xf0) << 4) | (1 << 22))
933
934 static sljit_s32 emit_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 inp_flags,
935 sljit_s32 dst, sljit_sw dstw,
936 sljit_s32 src1, sljit_sw src1w,
937 sljit_s32 src2, sljit_sw src2w);
938
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)939 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler,
940 sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
941 sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
942 {
943 sljit_s32 args, size, i, tmp;
944 sljit_uw push;
945
946 CHECK_ERROR();
947 CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
948 set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
949
950 /* Push saved registers, temporary registers
951 stmdb sp!, {..., lr} */
952 push = PUSH | (1 << 14);
953
954 tmp = saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - saveds) : SLJIT_FIRST_SAVED_REG;
955 for (i = SLJIT_S0; i >= tmp; i--)
956 push |= 1 << reg_map[i];
957
958 for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
959 push |= 1 << reg_map[i];
960
961 FAIL_IF(push_inst(compiler, push));
962
963 /* Stack must be aligned to 8 bytes: */
964 size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
965 local_size = ((size + local_size + 7) & ~7) - size;
966 compiler->local_size = local_size;
967 if (local_size > 0)
968 FAIL_IF(emit_op(compiler, SLJIT_SUB, ALLOW_IMM, SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size));
969
970 args = get_arg_count(arg_types);
971
972 if (args >= 1)
973 FAIL_IF(push_inst(compiler, MOV | RD(SLJIT_S0) | RM(SLJIT_R0)));
974 if (args >= 2)
975 FAIL_IF(push_inst(compiler, MOV | RD(SLJIT_S1) | RM(SLJIT_R1)));
976 if (args >= 3)
977 FAIL_IF(push_inst(compiler, MOV | RD(SLJIT_S2) | RM(SLJIT_R2)));
978
979 return SLJIT_SUCCESS;
980 }
981
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)982 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler,
983 sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
984 sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
985 {
986 sljit_s32 size;
987
988 CHECK_ERROR();
989 CHECK(check_sljit_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
990 set_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
991
992 size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
993 compiler->local_size = ((size + local_size + 7) & ~7) - size;
994 return SLJIT_SUCCESS;
995 }
996
sljit_emit_return(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src,sljit_sw srcw)997 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw)
998 {
999 sljit_s32 i, tmp;
1000 sljit_uw pop;
1001
1002 CHECK_ERROR();
1003 CHECK(check_sljit_emit_return(compiler, op, src, srcw));
1004
1005 FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
1006
1007 if (compiler->local_size > 0)
1008 FAIL_IF(emit_op(compiler, SLJIT_ADD, ALLOW_IMM, SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, compiler->local_size));
1009
1010 /* Push saved registers, temporary registers
1011 ldmia sp!, {..., pc} */
1012 pop = POP | (1 << 15);
1013
1014 tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG;
1015 for (i = SLJIT_S0; i >= tmp; i--)
1016 pop |= 1 << reg_map[i];
1017
1018 for (i = compiler->scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
1019 pop |= 1 << reg_map[i];
1020
1021 return push_inst(compiler, pop);
1022 }
1023
1024 /* --------------------------------------------------------------------- */
1025 /* Operators */
1026 /* --------------------------------------------------------------------- */
1027
1028 /* flags: */
1029 /* Arguments are swapped. */
1030 #define ARGS_SWAPPED 0x01
1031 /* Inverted immediate. */
1032 #define INV_IMM 0x02
1033 /* Source and destination is register. */
1034 #define MOVE_REG_CONV 0x04
1035 /* Unused return value. */
1036 #define UNUSED_RETURN 0x08
1037 /* SET_FLAGS must be (1 << 20) as it is also the value of S bit (can be used for optimization). */
1038 #define SET_FLAGS (1 << 20)
1039 /* dst: reg
1040 src1: reg
1041 src2: reg or imm (if allowed)
1042 SRC2_IMM must be (1 << 25) as it is also the value of I bit (can be used for optimization). */
1043 #define SRC2_IMM (1 << 25)
1044
1045 #define EMIT_SHIFT_INS_AND_RETURN(opcode) \
1046 SLJIT_ASSERT(!(flags & INV_IMM) && !(src2 & SRC2_IMM)); \
1047 if (compiler->shift_imm != 0x20) { \
1048 SLJIT_ASSERT(src1 == TMP_REG1); \
1049 SLJIT_ASSERT(!(flags & ARGS_SWAPPED)); \
1050 \
1051 if (compiler->shift_imm != 0) \
1052 return push_inst(compiler, MOV | (flags & SET_FLAGS) | \
1053 RD(dst) | (compiler->shift_imm << 7) | (opcode << 5) | RM(src2)); \
1054 return push_inst(compiler, MOV | (flags & SET_FLAGS) | RD(dst) | RM(src2)); \
1055 } \
1056 return push_inst(compiler, MOV | (flags & SET_FLAGS) | RD(dst) | \
1057 (reg_map[(flags & ARGS_SWAPPED) ? src1 : src2] << 8) | (opcode << 5) | 0x10 | RM((flags & ARGS_SWAPPED) ? src2 : src1));
1058
emit_single_op(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 flags,sljit_s32 dst,sljit_s32 src1,sljit_s32 src2)1059 static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags,
1060 sljit_s32 dst, sljit_s32 src1, sljit_s32 src2)
1061 {
1062 switch (GET_OPCODE(op)) {
1063 case SLJIT_MOV:
1064 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1065 if (dst != src2) {
1066 if (src2 & SRC2_IMM) {
1067 return push_inst(compiler, ((flags & INV_IMM) ? MVN : MOV) | RD(dst) | src2);
1068 }
1069 return push_inst(compiler, MOV | RD(dst) | RM(src2));
1070 }
1071 return SLJIT_SUCCESS;
1072
1073 case SLJIT_MOV_U8:
1074 case SLJIT_MOV_S8:
1075 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1076 if (flags & MOVE_REG_CONV) {
1077 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1078 if (op == SLJIT_MOV_U8)
1079 return push_inst(compiler, AND | RD(dst) | RN(src2) | SRC2_IMM | 0xff);
1080 FAIL_IF(push_inst(compiler, MOV | RD(dst) | (24 << 7) | RM(src2)));
1081 return push_inst(compiler, MOV | RD(dst) | (24 << 7) | (op == SLJIT_MOV_U8 ? 0x20 : 0x40) | RM(dst));
1082 #else
1083 return push_inst(compiler, (op == SLJIT_MOV_U8 ? UXTB : SXTB) | RD(dst) | RM(src2));
1084 #endif
1085 }
1086 else if (dst != src2) {
1087 SLJIT_ASSERT(src2 & SRC2_IMM);
1088 return push_inst(compiler, ((flags & INV_IMM) ? MVN : MOV) | RD(dst) | src2);
1089 }
1090 return SLJIT_SUCCESS;
1091
1092 case SLJIT_MOV_U16:
1093 case SLJIT_MOV_S16:
1094 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1095 if (flags & MOVE_REG_CONV) {
1096 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1097 FAIL_IF(push_inst(compiler, MOV | RD(dst) | (16 << 7) | RM(src2)));
1098 return push_inst(compiler, MOV | RD(dst) | (16 << 7) | (op == SLJIT_MOV_U16 ? 0x20 : 0x40) | RM(dst));
1099 #else
1100 return push_inst(compiler, (op == SLJIT_MOV_U16 ? UXTH : SXTH) | RD(dst) | RM(src2));
1101 #endif
1102 }
1103 else if (dst != src2) {
1104 SLJIT_ASSERT(src2 & SRC2_IMM);
1105 return push_inst(compiler, ((flags & INV_IMM) ? MVN : MOV) | RD(dst) | src2);
1106 }
1107 return SLJIT_SUCCESS;
1108
1109 case SLJIT_NOT:
1110 if (src2 & SRC2_IMM) {
1111 return push_inst(compiler, ((flags & INV_IMM) ? MOV : MVN) | (flags & SET_FLAGS) | RD(dst) | src2);
1112 }
1113 return push_inst(compiler, MVN | (flags & SET_FLAGS) | RD(dst) | RM(src2));
1114
1115 case SLJIT_CLZ:
1116 SLJIT_ASSERT(!(flags & INV_IMM));
1117 SLJIT_ASSERT(!(src2 & SRC2_IMM));
1118 FAIL_IF(push_inst(compiler, CLZ | RD(dst) | RM(src2)));
1119 return SLJIT_SUCCESS;
1120
1121 case SLJIT_ADD:
1122 SLJIT_ASSERT(!(flags & INV_IMM));
1123 if ((flags & (UNUSED_RETURN | SET_FLAGS)) == (UNUSED_RETURN | SET_FLAGS) && !(flags & ARGS_SWAPPED))
1124 return push_inst(compiler, CMN | SET_FLAGS | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1125 return push_inst(compiler, ADD | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1126
1127 case SLJIT_ADDC:
1128 SLJIT_ASSERT(!(flags & INV_IMM));
1129 return push_inst(compiler, ADC | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1130
1131 case SLJIT_SUB:
1132 SLJIT_ASSERT(!(flags & INV_IMM));
1133 if ((flags & (UNUSED_RETURN | SET_FLAGS)) == (UNUSED_RETURN | SET_FLAGS) && !(flags & ARGS_SWAPPED))
1134 return push_inst(compiler, CMP | SET_FLAGS | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1135 return push_inst(compiler, (!(flags & ARGS_SWAPPED) ? SUB : RSB) | (flags & SET_FLAGS)
1136 | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1137
1138 case SLJIT_SUBC:
1139 SLJIT_ASSERT(!(flags & INV_IMM));
1140 return push_inst(compiler, (!(flags & ARGS_SWAPPED) ? SBC : RSC) | (flags & SET_FLAGS)
1141 | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1142
1143 case SLJIT_MUL:
1144 SLJIT_ASSERT(!(flags & INV_IMM));
1145 SLJIT_ASSERT(!(src2 & SRC2_IMM));
1146
1147 if (!HAS_FLAGS(op))
1148 return push_inst(compiler, MUL | (reg_map[dst] << 16) | (reg_map[src2] << 8) | reg_map[src1]);
1149
1150 FAIL_IF(push_inst(compiler, SMULL | (reg_map[TMP_REG1] << 16) | (reg_map[dst] << 12) | (reg_map[src2] << 8) | reg_map[src1]));
1151
1152 /* cmp TMP_REG1, dst asr #31. */
1153 return push_inst(compiler, CMP | SET_FLAGS | RN(TMP_REG1) | RM(dst) | 0xfc0);
1154
1155 case SLJIT_AND:
1156 return push_inst(compiler, (!(flags & INV_IMM) ? AND : BIC) | (flags & SET_FLAGS)
1157 | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1158
1159 case SLJIT_OR:
1160 SLJIT_ASSERT(!(flags & INV_IMM));
1161 return push_inst(compiler, ORR | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1162
1163 case SLJIT_XOR:
1164 SLJIT_ASSERT(!(flags & INV_IMM));
1165 return push_inst(compiler, EOR | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1166
1167 case SLJIT_SHL:
1168 EMIT_SHIFT_INS_AND_RETURN(0);
1169
1170 case SLJIT_LSHR:
1171 EMIT_SHIFT_INS_AND_RETURN(1);
1172
1173 case SLJIT_ASHR:
1174 EMIT_SHIFT_INS_AND_RETURN(2);
1175 }
1176
1177 SLJIT_UNREACHABLE();
1178 return SLJIT_SUCCESS;
1179 }
1180
1181 #undef EMIT_SHIFT_INS_AND_RETURN
1182
1183 /* Tests whether the immediate can be stored in the 12 bit imm field.
1184 Returns with 0 if not possible. */
get_imm(sljit_uw imm)1185 static sljit_uw get_imm(sljit_uw imm)
1186 {
1187 sljit_s32 rol;
1188
1189 if (imm <= 0xff)
1190 return SRC2_IMM | imm;
1191
1192 if (!(imm & 0xff000000)) {
1193 imm <<= 8;
1194 rol = 8;
1195 }
1196 else {
1197 imm = (imm << 24) | (imm >> 8);
1198 rol = 0;
1199 }
1200
1201 if (!(imm & 0xff000000)) {
1202 imm <<= 8;
1203 rol += 4;
1204 }
1205
1206 if (!(imm & 0xf0000000)) {
1207 imm <<= 4;
1208 rol += 2;
1209 }
1210
1211 if (!(imm & 0xc0000000)) {
1212 imm <<= 2;
1213 rol += 1;
1214 }
1215
1216 if (!(imm & 0x00ffffff))
1217 return SRC2_IMM | (imm >> 24) | (rol << 8);
1218 else
1219 return 0;
1220 }
1221
1222 #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)1223 static sljit_s32 generate_int(struct sljit_compiler *compiler, sljit_s32 reg, sljit_uw imm, sljit_s32 positive)
1224 {
1225 sljit_uw mask;
1226 sljit_uw imm1;
1227 sljit_uw imm2;
1228 sljit_s32 rol;
1229
1230 /* Step1: Search a zero byte (8 continous zero bit). */
1231 mask = 0xff000000;
1232 rol = 8;
1233 while(1) {
1234 if (!(imm & mask)) {
1235 /* Rol imm by rol. */
1236 imm = (imm << rol) | (imm >> (32 - rol));
1237 /* Calculate arm rol. */
1238 rol = 4 + (rol >> 1);
1239 break;
1240 }
1241 rol += 2;
1242 mask >>= 2;
1243 if (mask & 0x3) {
1244 /* rol by 8. */
1245 imm = (imm << 8) | (imm >> 24);
1246 mask = 0xff00;
1247 rol = 24;
1248 while (1) {
1249 if (!(imm & mask)) {
1250 /* Rol imm by rol. */
1251 imm = (imm << rol) | (imm >> (32 - rol));
1252 /* Calculate arm rol. */
1253 rol = (rol >> 1) - 8;
1254 break;
1255 }
1256 rol += 2;
1257 mask >>= 2;
1258 if (mask & 0x3)
1259 return 0;
1260 }
1261 break;
1262 }
1263 }
1264
1265 /* The low 8 bit must be zero. */
1266 SLJIT_ASSERT(!(imm & 0xff));
1267
1268 if (!(imm & 0xff000000)) {
1269 imm1 = SRC2_IMM | ((imm >> 16) & 0xff) | (((rol + 4) & 0xf) << 8);
1270 imm2 = SRC2_IMM | ((imm >> 8) & 0xff) | (((rol + 8) & 0xf) << 8);
1271 }
1272 else if (imm & 0xc0000000) {
1273 imm1 = SRC2_IMM | ((imm >> 24) & 0xff) | ((rol & 0xf) << 8);
1274 imm <<= 8;
1275 rol += 4;
1276
1277 if (!(imm & 0xff000000)) {
1278 imm <<= 8;
1279 rol += 4;
1280 }
1281
1282 if (!(imm & 0xf0000000)) {
1283 imm <<= 4;
1284 rol += 2;
1285 }
1286
1287 if (!(imm & 0xc0000000)) {
1288 imm <<= 2;
1289 rol += 1;
1290 }
1291
1292 if (!(imm & 0x00ffffff))
1293 imm2 = SRC2_IMM | (imm >> 24) | ((rol & 0xf) << 8);
1294 else
1295 return 0;
1296 }
1297 else {
1298 if (!(imm & 0xf0000000)) {
1299 imm <<= 4;
1300 rol += 2;
1301 }
1302
1303 if (!(imm & 0xc0000000)) {
1304 imm <<= 2;
1305 rol += 1;
1306 }
1307
1308 imm1 = SRC2_IMM | ((imm >> 24) & 0xff) | ((rol & 0xf) << 8);
1309 imm <<= 8;
1310 rol += 4;
1311
1312 if (!(imm & 0xf0000000)) {
1313 imm <<= 4;
1314 rol += 2;
1315 }
1316
1317 if (!(imm & 0xc0000000)) {
1318 imm <<= 2;
1319 rol += 1;
1320 }
1321
1322 if (!(imm & 0x00ffffff))
1323 imm2 = SRC2_IMM | (imm >> 24) | ((rol & 0xf) << 8);
1324 else
1325 return 0;
1326 }
1327
1328 FAIL_IF(push_inst(compiler, (positive ? MOV : MVN) | RD(reg) | imm1));
1329 FAIL_IF(push_inst(compiler, (positive ? ORR : BIC) | RD(reg) | RN(reg) | imm2));
1330 return 1;
1331 }
1332 #endif
1333
load_immediate(struct sljit_compiler * compiler,sljit_s32 reg,sljit_uw imm)1334 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 reg, sljit_uw imm)
1335 {
1336 sljit_uw tmp;
1337
1338 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
1339 if (!(imm & ~0xffff))
1340 return push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff));
1341 #endif
1342
1343 /* Create imm by 1 inst. */
1344 tmp = get_imm(imm);
1345 if (tmp)
1346 return push_inst(compiler, MOV | RD(reg) | tmp);
1347
1348 tmp = get_imm(~imm);
1349 if (tmp)
1350 return push_inst(compiler, MVN | RD(reg) | tmp);
1351
1352 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1353 /* Create imm by 2 inst. */
1354 FAIL_IF(generate_int(compiler, reg, imm, 1));
1355 FAIL_IF(generate_int(compiler, reg, ~imm, 0));
1356
1357 /* Load integer. */
1358 return push_inst_with_literal(compiler, EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1, reg, TMP_PC, 0), imm);
1359 #else
1360 FAIL_IF(push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff)));
1361 if (imm <= 0xffff)
1362 return SLJIT_SUCCESS;
1363 return push_inst(compiler, MOVT | RD(reg) | ((imm >> 12) & 0xf0000) | ((imm >> 16) & 0xfff));
1364 #endif
1365 }
1366
emit_op_mem(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 reg,sljit_s32 arg,sljit_sw argw,sljit_s32 tmp_reg)1367 static SLJIT_INLINE sljit_s32 emit_op_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg,
1368 sljit_s32 arg, sljit_sw argw, sljit_s32 tmp_reg)
1369 {
1370 sljit_uw imm, offset_reg;
1371 sljit_uw is_type1_transfer = IS_TYPE1_TRANSFER(flags);
1372
1373 SLJIT_ASSERT (arg & SLJIT_MEM);
1374 SLJIT_ASSERT((arg & REG_MASK) != tmp_reg);
1375
1376 if ((arg & REG_MASK) == SLJIT_UNUSED) {
1377 if (is_type1_transfer) {
1378 FAIL_IF(load_immediate(compiler, tmp_reg, argw & ~0xfff));
1379 argw &= 0xfff;
1380 }
1381 else {
1382 FAIL_IF(load_immediate(compiler, tmp_reg, argw & ~0xff));
1383 argw &= 0xff;
1384 }
1385
1386 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, tmp_reg,
1387 is_type1_transfer ? argw : TYPE2_TRANSFER_IMM(argw)));
1388 }
1389
1390 if (arg & OFFS_REG_MASK) {
1391 offset_reg = OFFS_REG(arg);
1392 arg &= REG_MASK;
1393 argw &= 0x3;
1394
1395 if (argw != 0 && !is_type1_transfer) {
1396 FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg) | RM(offset_reg) | (argw << 7)));
1397 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, tmp_reg, TYPE2_TRANSFER_IMM(0)));
1398 }
1399
1400 /* Bit 25: RM is offset. */
1401 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg,
1402 RM(offset_reg) | (is_type1_transfer ? (1 << 25) : 0) | (argw << 7)));
1403 }
1404
1405 arg &= REG_MASK;
1406
1407 if (is_type1_transfer) {
1408 if (argw > 0xfff) {
1409 imm = get_imm(argw & ~0xfff);
1410 if (imm) {
1411 FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg) | imm));
1412 argw = argw & 0xfff;
1413 arg = tmp_reg;
1414 }
1415 }
1416 else if (argw < -0xfff) {
1417 imm = get_imm(-argw & ~0xfff);
1418 if (imm) {
1419 FAIL_IF(push_inst(compiler, SUB | RD(tmp_reg) | RN(arg) | imm));
1420 argw = -(-argw & 0xfff);
1421 arg = tmp_reg;
1422 }
1423 }
1424
1425 if (argw >= 0 && argw <= 0xfff)
1426 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg, argw));
1427
1428 if (argw < 0 && argw >= -0xfff)
1429 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 0, reg, arg, -argw));
1430 }
1431 else {
1432 if (argw > 0xff) {
1433 imm = get_imm(argw & ~0xff);
1434 if (imm) {
1435 FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg) | imm));
1436 argw = argw & 0xff;
1437 arg = tmp_reg;
1438 }
1439 }
1440 else if (argw < -0xff) {
1441 imm = get_imm(-argw & ~0xff);
1442 if (imm) {
1443 FAIL_IF(push_inst(compiler, SUB | RD(tmp_reg) | RN(arg) | imm));
1444 argw = -(-argw & 0xff);
1445 arg = tmp_reg;
1446 }
1447 }
1448
1449 if (argw >= 0 && argw <= 0xff)
1450 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg, TYPE2_TRANSFER_IMM(argw)));
1451
1452 if (argw < 0 && argw >= -0xff) {
1453 argw = -argw;
1454 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 0, reg, arg, TYPE2_TRANSFER_IMM(argw)));
1455 }
1456 }
1457
1458 FAIL_IF(load_immediate(compiler, tmp_reg, argw));
1459 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg,
1460 RM(tmp_reg) | (is_type1_transfer ? (1 << 25) : 0)));
1461 }
1462
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)1463 static sljit_s32 emit_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 inp_flags,
1464 sljit_s32 dst, sljit_sw dstw,
1465 sljit_s32 src1, sljit_sw src1w,
1466 sljit_s32 src2, sljit_sw src2w)
1467 {
1468 /* src1 is reg or TMP_REG1
1469 src2 is reg, TMP_REG2, or imm
1470 result goes to TMP_REG2, so put result can use TMP_REG1. */
1471
1472 /* We prefers register and simple consts. */
1473 sljit_s32 dst_reg;
1474 sljit_s32 src1_reg;
1475 sljit_s32 src2_reg;
1476 sljit_s32 flags = HAS_FLAGS(op) ? SET_FLAGS : 0;
1477
1478 /* Destination check. */
1479 if (SLJIT_UNLIKELY(dst == SLJIT_UNUSED))
1480 flags |= UNUSED_RETURN;
1481
1482 SLJIT_ASSERT(!(inp_flags & ALLOW_INV_IMM) || (inp_flags & ALLOW_IMM));
1483
1484 src2_reg = 0;
1485
1486 do {
1487 if (!(inp_flags & ALLOW_IMM))
1488 break;
1489
1490 if (src2 & SLJIT_IMM) {
1491 src2_reg = get_imm(src2w);
1492 if (src2_reg)
1493 break;
1494 if (inp_flags & ALLOW_INV_IMM) {
1495 src2_reg = get_imm(~src2w);
1496 if (src2_reg) {
1497 flags |= INV_IMM;
1498 break;
1499 }
1500 }
1501 if (GET_OPCODE(op) == SLJIT_ADD) {
1502 src2_reg = get_imm(-src2w);
1503 if (src2_reg) {
1504 op = SLJIT_SUB | GET_ALL_FLAGS(op);
1505 break;
1506 }
1507 }
1508 if (GET_OPCODE(op) == SLJIT_SUB) {
1509 src2_reg = get_imm(-src2w);
1510 if (src2_reg) {
1511 op = SLJIT_ADD | GET_ALL_FLAGS(op);
1512 break;
1513 }
1514 }
1515 }
1516
1517 if (src1 & SLJIT_IMM) {
1518 src2_reg = get_imm(src1w);
1519 if (src2_reg) {
1520 flags |= ARGS_SWAPPED;
1521 src1 = src2;
1522 src1w = src2w;
1523 break;
1524 }
1525 if (inp_flags & ALLOW_INV_IMM) {
1526 src2_reg = get_imm(~src1w);
1527 if (src2_reg) {
1528 flags |= ARGS_SWAPPED | INV_IMM;
1529 src1 = src2;
1530 src1w = src2w;
1531 break;
1532 }
1533 }
1534 if (GET_OPCODE(op) == SLJIT_ADD) {
1535 src2_reg = get_imm(-src1w);
1536 if (src2_reg) {
1537 /* Note: add is commutative operation. */
1538 src1 = src2;
1539 src1w = src2w;
1540 op = SLJIT_SUB | GET_ALL_FLAGS(op);
1541 break;
1542 }
1543 }
1544 }
1545 } while(0);
1546
1547 /* Source 1. */
1548 if (FAST_IS_REG(src1))
1549 src1_reg = src1;
1550 else if (src1 & SLJIT_MEM) {
1551 FAIL_IF(emit_op_mem(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, TMP_REG1));
1552 src1_reg = TMP_REG1;
1553 }
1554 else {
1555 FAIL_IF(load_immediate(compiler, TMP_REG1, src1w));
1556 src1_reg = TMP_REG1;
1557 }
1558
1559 /* Destination. */
1560 dst_reg = SLOW_IS_REG(dst) ? dst : TMP_REG2;
1561
1562 if (op <= SLJIT_MOV_P) {
1563 if (dst & SLJIT_MEM) {
1564 if (inp_flags & BYTE_SIZE)
1565 inp_flags &= ~SIGNED;
1566
1567 if (FAST_IS_REG(src2))
1568 return emit_op_mem(compiler, inp_flags, src2, dst, dstw, TMP_REG2);
1569 }
1570
1571 if (FAST_IS_REG(src2) && dst_reg != TMP_REG2)
1572 flags |= MOVE_REG_CONV;
1573 }
1574
1575 /* Source 2. */
1576 if (src2_reg == 0) {
1577 src2_reg = (op <= SLJIT_MOV_P) ? dst_reg : TMP_REG2;
1578
1579 if (FAST_IS_REG(src2))
1580 src2_reg = src2;
1581 else if (src2 & SLJIT_MEM)
1582 FAIL_IF(emit_op_mem(compiler, inp_flags | LOAD_DATA, src2_reg, src2, src2w, TMP_REG2));
1583 else
1584 FAIL_IF(load_immediate(compiler, src2_reg, src2w));
1585 }
1586
1587 FAIL_IF(emit_single_op(compiler, op, flags, dst_reg, src1_reg, src2_reg));
1588
1589 if (!(dst & SLJIT_MEM))
1590 return SLJIT_SUCCESS;
1591
1592 return emit_op_mem(compiler, inp_flags, dst_reg, dst, dstw, TMP_REG1);
1593 }
1594
1595 #ifdef __cplusplus
1596 extern "C" {
1597 #endif
1598
1599 #if defined(__GNUC__)
1600 extern unsigned int __aeabi_uidivmod(unsigned int numerator, unsigned int denominator);
1601 extern int __aeabi_idivmod(int numerator, int denominator);
1602 #else
1603 #error "Software divmod functions are needed"
1604 #endif
1605
1606 #ifdef __cplusplus
1607 }
1608 #endif
1609
sljit_emit_op0(struct sljit_compiler * compiler,sljit_s32 op)1610 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op0(struct sljit_compiler *compiler, sljit_s32 op)
1611 {
1612 sljit_sw saved_reg_list[3];
1613 sljit_sw saved_reg_count;
1614
1615 CHECK_ERROR();
1616 CHECK(check_sljit_emit_op0(compiler, op));
1617
1618 op = GET_OPCODE(op);
1619 switch (op) {
1620 case SLJIT_BREAKPOINT:
1621 FAIL_IF(push_inst(compiler, BKPT));
1622 break;
1623 case SLJIT_NOP:
1624 FAIL_IF(push_inst(compiler, NOP));
1625 break;
1626 case SLJIT_LMUL_UW:
1627 case SLJIT_LMUL_SW:
1628 return push_inst(compiler, (op == SLJIT_LMUL_UW ? UMULL : SMULL)
1629 | (reg_map[SLJIT_R1] << 16)
1630 | (reg_map[SLJIT_R0] << 12)
1631 | (reg_map[SLJIT_R0] << 8)
1632 | reg_map[SLJIT_R1]);
1633 case SLJIT_DIVMOD_UW:
1634 case SLJIT_DIVMOD_SW:
1635 case SLJIT_DIV_UW:
1636 case SLJIT_DIV_SW:
1637 SLJIT_COMPILE_ASSERT((SLJIT_DIVMOD_UW & 0x2) == 0 && SLJIT_DIV_UW - 0x2 == SLJIT_DIVMOD_UW, bad_div_opcode_assignments);
1638 SLJIT_ASSERT(reg_map[2] == 1 && reg_map[3] == 2 && reg_map[4] == 3);
1639
1640 saved_reg_count = 0;
1641 if (compiler->scratches >= 4)
1642 saved_reg_list[saved_reg_count++] = 3;
1643 if (compiler->scratches >= 3)
1644 saved_reg_list[saved_reg_count++] = 2;
1645 if (op >= SLJIT_DIV_UW)
1646 saved_reg_list[saved_reg_count++] = 1;
1647
1648 if (saved_reg_count > 0) {
1649 FAIL_IF(push_inst(compiler, 0xe52d0000 | (saved_reg_count >= 3 ? 16 : 8)
1650 | (saved_reg_list[0] << 12) /* str rX, [sp, #-8/-16]! */));
1651 if (saved_reg_count >= 2) {
1652 SLJIT_ASSERT(saved_reg_list[1] < 8);
1653 FAIL_IF(push_inst(compiler, 0xe58d0004 | (saved_reg_list[1] << 12) /* str rX, [sp, #4] */));
1654 }
1655 if (saved_reg_count >= 3) {
1656 SLJIT_ASSERT(saved_reg_list[2] < 8);
1657 FAIL_IF(push_inst(compiler, 0xe58d0008 | (saved_reg_list[2] << 12) /* str rX, [sp, #8] */));
1658 }
1659 }
1660
1661 #if defined(__GNUC__)
1662 FAIL_IF(sljit_emit_ijump(compiler, SLJIT_FAST_CALL, SLJIT_IMM,
1663 ((op | 0x2) == SLJIT_DIV_UW ? SLJIT_FUNC_OFFSET(__aeabi_uidivmod) : SLJIT_FUNC_OFFSET(__aeabi_idivmod))));
1664 #else
1665 #error "Software divmod functions are needed"
1666 #endif
1667
1668 if (saved_reg_count > 0) {
1669 if (saved_reg_count >= 3) {
1670 SLJIT_ASSERT(saved_reg_list[2] < 8);
1671 FAIL_IF(push_inst(compiler, 0xe59d0008 | (saved_reg_list[2] << 12) /* ldr rX, [sp, #8] */));
1672 }
1673 if (saved_reg_count >= 2) {
1674 SLJIT_ASSERT(saved_reg_list[1] < 8);
1675 FAIL_IF(push_inst(compiler, 0xe59d0004 | (saved_reg_list[1] << 12) /* ldr rX, [sp, #4] */));
1676 }
1677 return push_inst(compiler, 0xe49d0000 | (saved_reg_count >= 3 ? 16 : 8)
1678 | (saved_reg_list[0] << 12) /* ldr rX, [sp], #8/16 */);
1679 }
1680 return SLJIT_SUCCESS;
1681 }
1682
1683 return SLJIT_SUCCESS;
1684 }
1685
sljit_emit_op1(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1686 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op1(struct sljit_compiler *compiler, sljit_s32 op,
1687 sljit_s32 dst, sljit_sw dstw,
1688 sljit_s32 src, sljit_sw srcw)
1689 {
1690 CHECK_ERROR();
1691 CHECK(check_sljit_emit_op1(compiler, op, dst, dstw, src, srcw));
1692 ADJUST_LOCAL_OFFSET(dst, dstw);
1693 ADJUST_LOCAL_OFFSET(src, srcw);
1694
1695 if (dst == SLJIT_UNUSED && !HAS_FLAGS(op)) {
1696 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
1697 if (op <= SLJIT_MOV_P && (src & SLJIT_MEM))
1698 return emit_op_mem(compiler, PRELOAD | LOAD_DATA, TMP_PC, src, srcw, TMP_REG1);
1699 #endif
1700 return SLJIT_SUCCESS;
1701 }
1702
1703 switch (GET_OPCODE(op)) {
1704 case SLJIT_MOV:
1705 case SLJIT_MOV_U32:
1706 case SLJIT_MOV_S32:
1707 case SLJIT_MOV_P:
1708 return emit_op(compiler, SLJIT_MOV, ALLOW_ANY_IMM, dst, dstw, TMP_REG1, 0, src, srcw);
1709
1710 case SLJIT_MOV_U8:
1711 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);
1712
1713 case SLJIT_MOV_S8:
1714 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);
1715
1716 case SLJIT_MOV_U16:
1717 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);
1718
1719 case SLJIT_MOV_S16:
1720 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);
1721
1722 case SLJIT_NOT:
1723 return emit_op(compiler, op, ALLOW_ANY_IMM, dst, dstw, TMP_REG1, 0, src, srcw);
1724
1725 case SLJIT_NEG:
1726 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
1727 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
1728 compiler->skip_checks = 1;
1729 #endif
1730 return sljit_emit_op2(compiler, SLJIT_SUB | GET_ALL_FLAGS(op), dst, dstw, SLJIT_IMM, 0, src, srcw);
1731
1732 case SLJIT_CLZ:
1733 return emit_op(compiler, op, 0, dst, dstw, TMP_REG1, 0, src, srcw);
1734 }
1735
1736 return SLJIT_SUCCESS;
1737 }
1738
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)1739 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op2(struct sljit_compiler *compiler, sljit_s32 op,
1740 sljit_s32 dst, sljit_sw dstw,
1741 sljit_s32 src1, sljit_sw src1w,
1742 sljit_s32 src2, sljit_sw src2w)
1743 {
1744 CHECK_ERROR();
1745 CHECK(check_sljit_emit_op2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1746 ADJUST_LOCAL_OFFSET(dst, dstw);
1747 ADJUST_LOCAL_OFFSET(src1, src1w);
1748 ADJUST_LOCAL_OFFSET(src2, src2w);
1749
1750 if (dst == SLJIT_UNUSED && !HAS_FLAGS(op))
1751 return SLJIT_SUCCESS;
1752
1753 switch (GET_OPCODE(op)) {
1754 case SLJIT_ADD:
1755 case SLJIT_ADDC:
1756 case SLJIT_SUB:
1757 case SLJIT_SUBC:
1758 case SLJIT_OR:
1759 case SLJIT_XOR:
1760 return emit_op(compiler, op, ALLOW_IMM, dst, dstw, src1, src1w, src2, src2w);
1761
1762 case SLJIT_MUL:
1763 return emit_op(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w);
1764
1765 case SLJIT_AND:
1766 return emit_op(compiler, op, ALLOW_ANY_IMM, dst, dstw, src1, src1w, src2, src2w);
1767
1768 case SLJIT_SHL:
1769 case SLJIT_LSHR:
1770 case SLJIT_ASHR:
1771 if (src2 & SLJIT_IMM) {
1772 compiler->shift_imm = src2w & 0x1f;
1773 return emit_op(compiler, op, 0, dst, dstw, TMP_REG1, 0, src1, src1w);
1774 }
1775 else {
1776 compiler->shift_imm = 0x20;
1777 return emit_op(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w);
1778 }
1779 }
1780
1781 return SLJIT_SUCCESS;
1782 }
1783
sljit_get_register_index(sljit_s32 reg)1784 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_register_index(sljit_s32 reg)
1785 {
1786 CHECK_REG_INDEX(check_sljit_get_register_index(reg));
1787 return reg_map[reg];
1788 }
1789
sljit_get_float_register_index(sljit_s32 reg)1790 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_float_register_index(sljit_s32 reg)
1791 {
1792 CHECK_REG_INDEX(check_sljit_get_float_register_index(reg));
1793 return (freg_map[reg] << 1);
1794 }
1795
sljit_emit_op_custom(struct sljit_compiler * compiler,void * instruction,sljit_s32 size)1796 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_custom(struct sljit_compiler *compiler,
1797 void *instruction, sljit_s32 size)
1798 {
1799 CHECK_ERROR();
1800 CHECK(check_sljit_emit_op_custom(compiler, instruction, size));
1801
1802 return push_inst(compiler, *(sljit_uw*)instruction);
1803 }
1804
1805 /* --------------------------------------------------------------------- */
1806 /* Floating point operators */
1807 /* --------------------------------------------------------------------- */
1808
1809
1810 #define FPU_LOAD (1 << 20)
1811 #define EMIT_FPU_DATA_TRANSFER(inst, add, base, freg, offs) \
1812 ((inst) | ((add) << 23) | (reg_map[base] << 16) | (freg_map[freg] << 12) | (offs))
1813 #define EMIT_FPU_OPERATION(opcode, mode, dst, src1, src2) \
1814 ((opcode) | (mode) | (freg_map[dst] << 12) | freg_map[src1] | (freg_map[src2] << 16))
1815
emit_fop_mem(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 reg,sljit_s32 arg,sljit_sw argw)1816 static sljit_s32 emit_fop_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg, sljit_s32 arg, sljit_sw argw)
1817 {
1818 sljit_uw imm;
1819 sljit_sw inst = VSTR_F32 | (flags & (SLJIT_F32_OP | FPU_LOAD));
1820
1821 SLJIT_ASSERT(arg & SLJIT_MEM);
1822 arg &= ~SLJIT_MEM;
1823
1824 if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
1825 FAIL_IF(push_inst(compiler, ADD | RD(TMP_REG2) | RN(arg & REG_MASK) | RM(OFFS_REG(arg)) | ((argw & 0x3) << 7)));
1826 arg = TMP_REG2;
1827 argw = 0;
1828 }
1829
1830 /* Fast loads and stores. */
1831 if (arg) {
1832 if (!(argw & ~0x3fc))
1833 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, arg & REG_MASK, reg, argw >> 2));
1834 if (!(-argw & ~0x3fc))
1835 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, arg & REG_MASK, reg, (-argw) >> 2));
1836
1837 imm = get_imm(argw & ~0x3fc);
1838 if (imm) {
1839 FAIL_IF(push_inst(compiler, ADD | RD(TMP_REG2) | RN(arg & REG_MASK) | imm));
1840 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG2, reg, (argw & 0x3fc) >> 2));
1841 }
1842 imm = get_imm(-argw & ~0x3fc);
1843 if (imm) {
1844 argw = -argw;
1845 FAIL_IF(push_inst(compiler, SUB | RD(TMP_REG2) | RN(arg & REG_MASK) | imm));
1846 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, TMP_REG2, reg, (argw & 0x3fc) >> 2));
1847 }
1848 }
1849
1850 if (arg) {
1851 FAIL_IF(load_immediate(compiler, TMP_REG2, argw));
1852 FAIL_IF(push_inst(compiler, ADD | RD(TMP_REG2) | RN(arg & REG_MASK) | RM(TMP_REG2)));
1853 }
1854 else
1855 FAIL_IF(load_immediate(compiler, TMP_REG2, argw));
1856
1857 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG2, reg, 0));
1858 }
1859
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)1860 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_sw_from_f64(struct sljit_compiler *compiler, sljit_s32 op,
1861 sljit_s32 dst, sljit_sw dstw,
1862 sljit_s32 src, sljit_sw srcw)
1863 {
1864 op ^= SLJIT_F32_OP;
1865
1866 if (src & SLJIT_MEM) {
1867 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src, srcw));
1868 src = TMP_FREG1;
1869 }
1870
1871 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_S32_F32, op & SLJIT_F32_OP, TMP_FREG1, src, 0)));
1872
1873 if (FAST_IS_REG(dst))
1874 return push_inst(compiler, VMOV | (1 << 20) | RD(dst) | (freg_map[TMP_FREG1] << 16));
1875
1876 /* Store the integer value from a VFP register. */
1877 return emit_fop_mem(compiler, 0, TMP_FREG1, dst, dstw);
1878 }
1879
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)1880 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_f64_from_sw(struct sljit_compiler *compiler, sljit_s32 op,
1881 sljit_s32 dst, sljit_sw dstw,
1882 sljit_s32 src, sljit_sw srcw)
1883 {
1884 sljit_s32 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1885
1886 op ^= SLJIT_F32_OP;
1887
1888 if (FAST_IS_REG(src))
1889 FAIL_IF(push_inst(compiler, VMOV | RD(src) | (freg_map[TMP_FREG1] << 16)));
1890 else if (src & SLJIT_MEM) {
1891 /* Load the integer value into a VFP register. */
1892 FAIL_IF(emit_fop_mem(compiler, FPU_LOAD, TMP_FREG1, src, srcw));
1893 }
1894 else {
1895 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
1896 FAIL_IF(push_inst(compiler, VMOV | RD(TMP_REG1) | (freg_map[TMP_FREG1] << 16)));
1897 }
1898
1899 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_F32_S32, op & SLJIT_F32_OP, dst_r, TMP_FREG1, 0)));
1900
1901 if (dst & SLJIT_MEM)
1902 return emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw);
1903 return SLJIT_SUCCESS;
1904 }
1905
sljit_emit_fop1_cmp(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src1,sljit_sw src1w,sljit_s32 src2,sljit_sw src2w)1906 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_cmp(struct sljit_compiler *compiler, sljit_s32 op,
1907 sljit_s32 src1, sljit_sw src1w,
1908 sljit_s32 src2, sljit_sw src2w)
1909 {
1910 op ^= SLJIT_F32_OP;
1911
1912 if (src1 & SLJIT_MEM) {
1913 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w));
1914 src1 = TMP_FREG1;
1915 }
1916
1917 if (src2 & SLJIT_MEM) {
1918 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w));
1919 src2 = TMP_FREG2;
1920 }
1921
1922 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCMP_F32, op & SLJIT_F32_OP, src1, src2, 0)));
1923 return push_inst(compiler, VMRS);
1924 }
1925
sljit_emit_fop1(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1926 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop1(struct sljit_compiler *compiler, sljit_s32 op,
1927 sljit_s32 dst, sljit_sw dstw,
1928 sljit_s32 src, sljit_sw srcw)
1929 {
1930 sljit_s32 dst_r;
1931
1932 CHECK_ERROR();
1933
1934 SLJIT_COMPILE_ASSERT((SLJIT_F32_OP == 0x100), float_transfer_bit_error);
1935 SELECT_FOP1_OPERATION_WITH_CHECKS(compiler, op, dst, dstw, src, srcw);
1936
1937 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1938
1939 if (GET_OPCODE(op) != SLJIT_CONV_F64_FROM_F32)
1940 op ^= SLJIT_F32_OP;
1941
1942 if (src & SLJIT_MEM) {
1943 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, dst_r, src, srcw));
1944 src = dst_r;
1945 }
1946
1947 switch (GET_OPCODE(op)) {
1948 case SLJIT_MOV_F64:
1949 if (src != dst_r) {
1950 if (dst_r != TMP_FREG1)
1951 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMOV_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1952 else
1953 dst_r = src;
1954 }
1955 break;
1956 case SLJIT_NEG_F64:
1957 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VNEG_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1958 break;
1959 case SLJIT_ABS_F64:
1960 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VABS_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1961 break;
1962 case SLJIT_CONV_F64_FROM_F32:
1963 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_F64_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1964 op ^= SLJIT_F32_OP;
1965 break;
1966 }
1967
1968 if (dst & SLJIT_MEM)
1969 return emit_fop_mem(compiler, (op & SLJIT_F32_OP), dst_r, dst, dstw);
1970 return SLJIT_SUCCESS;
1971 }
1972
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)1973 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop2(struct sljit_compiler *compiler, sljit_s32 op,
1974 sljit_s32 dst, sljit_sw dstw,
1975 sljit_s32 src1, sljit_sw src1w,
1976 sljit_s32 src2, sljit_sw src2w)
1977 {
1978 sljit_s32 dst_r;
1979
1980 CHECK_ERROR();
1981 CHECK(check_sljit_emit_fop2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1982 ADJUST_LOCAL_OFFSET(dst, dstw);
1983 ADJUST_LOCAL_OFFSET(src1, src1w);
1984 ADJUST_LOCAL_OFFSET(src2, src2w);
1985
1986 op ^= SLJIT_F32_OP;
1987
1988 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1989
1990 if (src2 & SLJIT_MEM) {
1991 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w));
1992 src2 = TMP_FREG2;
1993 }
1994
1995 if (src1 & SLJIT_MEM) {
1996 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w));
1997 src1 = TMP_FREG1;
1998 }
1999
2000 switch (GET_OPCODE(op)) {
2001 case SLJIT_ADD_F64:
2002 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VADD_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2003 break;
2004
2005 case SLJIT_SUB_F64:
2006 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VSUB_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2007 break;
2008
2009 case SLJIT_MUL_F64:
2010 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMUL_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2011 break;
2012
2013 case SLJIT_DIV_F64:
2014 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VDIV_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2015 break;
2016 }
2017
2018 if (dst_r == TMP_FREG1)
2019 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw));
2020
2021 return SLJIT_SUCCESS;
2022 }
2023
2024 #undef FPU_LOAD
2025 #undef EMIT_FPU_DATA_TRANSFER
2026
2027 /* --------------------------------------------------------------------- */
2028 /* Other instructions */
2029 /* --------------------------------------------------------------------- */
2030
sljit_emit_fast_enter(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw)2031 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
2032 {
2033 CHECK_ERROR();
2034 CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
2035 ADJUST_LOCAL_OFFSET(dst, dstw);
2036
2037 SLJIT_ASSERT(reg_map[TMP_REG2] == 14);
2038
2039 if (FAST_IS_REG(dst))
2040 return push_inst(compiler, MOV | RD(dst) | RM(TMP_REG2));
2041
2042 /* Memory. */
2043 return emit_op_mem(compiler, WORD_SIZE, TMP_REG2, dst, dstw, TMP_REG1);
2044 }
2045
sljit_emit_fast_return(struct sljit_compiler * compiler,sljit_s32 src,sljit_sw srcw)2046 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw)
2047 {
2048 CHECK_ERROR();
2049 CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
2050 ADJUST_LOCAL_OFFSET(src, srcw);
2051
2052 SLJIT_ASSERT(reg_map[TMP_REG2] == 14);
2053
2054 if (FAST_IS_REG(src))
2055 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG2) | RM(src)));
2056 else
2057 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG2, src, srcw, TMP_REG1));
2058
2059 return push_inst(compiler, BX | RM(TMP_REG2));
2060 }
2061
2062 /* --------------------------------------------------------------------- */
2063 /* Conditional instructions */
2064 /* --------------------------------------------------------------------- */
2065
get_cc(sljit_s32 type)2066 static sljit_uw get_cc(sljit_s32 type)
2067 {
2068 switch (type) {
2069 case SLJIT_EQUAL:
2070 case SLJIT_MUL_NOT_OVERFLOW:
2071 case SLJIT_EQUAL_F64:
2072 return 0x00000000;
2073
2074 case SLJIT_NOT_EQUAL:
2075 case SLJIT_MUL_OVERFLOW:
2076 case SLJIT_NOT_EQUAL_F64:
2077 return 0x10000000;
2078
2079 case SLJIT_LESS:
2080 case SLJIT_LESS_F64:
2081 return 0x30000000;
2082
2083 case SLJIT_GREATER_EQUAL:
2084 case SLJIT_GREATER_EQUAL_F64:
2085 return 0x20000000;
2086
2087 case SLJIT_GREATER:
2088 case SLJIT_GREATER_F64:
2089 return 0x80000000;
2090
2091 case SLJIT_LESS_EQUAL:
2092 case SLJIT_LESS_EQUAL_F64:
2093 return 0x90000000;
2094
2095 case SLJIT_SIG_LESS:
2096 return 0xb0000000;
2097
2098 case SLJIT_SIG_GREATER_EQUAL:
2099 return 0xa0000000;
2100
2101 case SLJIT_SIG_GREATER:
2102 return 0xc0000000;
2103
2104 case SLJIT_SIG_LESS_EQUAL:
2105 return 0xd0000000;
2106
2107 case SLJIT_OVERFLOW:
2108 case SLJIT_UNORDERED_F64:
2109 return 0x60000000;
2110
2111 case SLJIT_NOT_OVERFLOW:
2112 case SLJIT_ORDERED_F64:
2113 return 0x70000000;
2114
2115 default:
2116 SLJIT_ASSERT(type >= SLJIT_JUMP && type <= SLJIT_CALL_CDECL);
2117 return 0xe0000000;
2118 }
2119 }
2120
sljit_emit_label(struct sljit_compiler * compiler)2121 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler)
2122 {
2123 struct sljit_label *label;
2124
2125 CHECK_ERROR_PTR();
2126 CHECK_PTR(check_sljit_emit_label(compiler));
2127
2128 if (compiler->last_label && compiler->last_label->size == compiler->size)
2129 return compiler->last_label;
2130
2131 label = (struct sljit_label*)ensure_abuf(compiler, sizeof(struct sljit_label));
2132 PTR_FAIL_IF(!label);
2133 set_label(label, compiler);
2134 return label;
2135 }
2136
sljit_emit_jump(struct sljit_compiler * compiler,sljit_s32 type)2137 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, sljit_s32 type)
2138 {
2139 struct sljit_jump *jump;
2140
2141 CHECK_ERROR_PTR();
2142 CHECK_PTR(check_sljit_emit_jump(compiler, type));
2143
2144 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
2145 PTR_FAIL_IF(!jump);
2146 set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
2147 type &= 0xff;
2148
2149 SLJIT_ASSERT(reg_map[TMP_REG1] != 14);
2150
2151 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2152 if (type >= SLJIT_FAST_CALL)
2153 PTR_FAIL_IF(prepare_blx(compiler));
2154 PTR_FAIL_IF(push_inst_with_unique_literal(compiler, ((EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1,
2155 type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, TMP_PC, 0)) & ~COND_MASK) | get_cc(type), 0));
2156
2157 if (jump->flags & SLJIT_REWRITABLE_JUMP) {
2158 jump->addr = compiler->size;
2159 compiler->patches++;
2160 }
2161
2162 if (type >= SLJIT_FAST_CALL) {
2163 jump->flags |= IS_BL;
2164 PTR_FAIL_IF(emit_blx(compiler));
2165 }
2166
2167 if (!(jump->flags & SLJIT_REWRITABLE_JUMP))
2168 jump->addr = compiler->size;
2169 #else
2170 if (type >= SLJIT_FAST_CALL)
2171 jump->flags |= IS_BL;
2172 PTR_FAIL_IF(emit_imm(compiler, TMP_REG1, 0));
2173 PTR_FAIL_IF(push_inst(compiler, (((type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1)) & ~COND_MASK) | get_cc(type)));
2174 jump->addr = compiler->size;
2175 #endif
2176 return jump;
2177 }
2178
2179 #ifdef __SOFTFP__
2180
softfloat_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types,sljit_s32 * src)2181 static sljit_s32 softfloat_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src)
2182 {
2183 sljit_s32 stack_offset = 0;
2184 sljit_s32 arg_count = 0;
2185 sljit_s32 word_arg_offset = 0;
2186 sljit_s32 float_arg_count = 0;
2187 sljit_s32 types = 0;
2188 sljit_s32 src_offset = 4 * sizeof(sljit_sw);
2189 sljit_u8 offsets[4];
2190
2191 if (src && FAST_IS_REG(*src))
2192 src_offset = reg_map[*src] * sizeof(sljit_sw);
2193
2194 arg_types >>= SLJIT_DEF_SHIFT;
2195
2196 while (arg_types) {
2197 types = (types << SLJIT_DEF_SHIFT) | (arg_types & SLJIT_DEF_MASK);
2198
2199 switch (arg_types & SLJIT_DEF_MASK) {
2200 case SLJIT_ARG_TYPE_F32:
2201 offsets[arg_count] = (sljit_u8)stack_offset;
2202 stack_offset += sizeof(sljit_f32);
2203 arg_count++;
2204 float_arg_count++;
2205 break;
2206 case SLJIT_ARG_TYPE_F64:
2207 if (stack_offset & 0x7)
2208 stack_offset += sizeof(sljit_sw);
2209 offsets[arg_count] = (sljit_u8)stack_offset;
2210 stack_offset += sizeof(sljit_f64);
2211 arg_count++;
2212 float_arg_count++;
2213 break;
2214 default:
2215 offsets[arg_count] = (sljit_u8)stack_offset;
2216 stack_offset += sizeof(sljit_sw);
2217 arg_count++;
2218 word_arg_offset += sizeof(sljit_sw);
2219 break;
2220 }
2221
2222 arg_types >>= SLJIT_DEF_SHIFT;
2223 }
2224
2225 if (stack_offset > 16)
2226 FAIL_IF(push_inst(compiler, SUB | RD(SLJIT_SP) | RN(SLJIT_SP) | SRC2_IMM | (((stack_offset - 16) + 0x7) & ~0x7)));
2227
2228 /* Process arguments in reversed direction. */
2229 while (types) {
2230 switch (types & SLJIT_DEF_MASK) {
2231 case SLJIT_ARG_TYPE_F32:
2232 arg_count--;
2233 float_arg_count--;
2234 stack_offset = offsets[arg_count];
2235
2236 if (stack_offset < 16) {
2237 if (src_offset == stack_offset) {
2238 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG1) | (src_offset >> 2)));
2239 *src = TMP_REG1;
2240 }
2241 FAIL_IF(push_inst(compiler, VMOV | 0x100000 | (float_arg_count << 16) | (stack_offset << 10)));
2242 } else
2243 FAIL_IF(push_inst(compiler, VSTR_F32 | 0x800000 | RN(SLJIT_SP) | (float_arg_count << 12) | ((stack_offset - 16) >> 2)));
2244 break;
2245 case SLJIT_ARG_TYPE_F64:
2246 arg_count--;
2247 float_arg_count--;
2248 stack_offset = offsets[arg_count];
2249
2250 SLJIT_ASSERT((stack_offset & 0x7) == 0);
2251
2252 if (stack_offset < 16) {
2253 if (src_offset == stack_offset || src_offset == stack_offset + sizeof(sljit_sw)) {
2254 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG1) | (src_offset >> 2)));
2255 *src = TMP_REG1;
2256 }
2257 FAIL_IF(push_inst(compiler, VMOV2 | 0x100000 | (stack_offset << 10) | ((stack_offset + sizeof(sljit_sw)) << 14) | float_arg_count));
2258 } else
2259 FAIL_IF(push_inst(compiler, VSTR_F32 | 0x800100 | RN(SLJIT_SP) | (float_arg_count << 12) | ((stack_offset - 16) >> 2)));
2260 break;
2261 default:
2262 arg_count--;
2263 word_arg_offset -= sizeof(sljit_sw);
2264 stack_offset = offsets[arg_count];
2265
2266 SLJIT_ASSERT(stack_offset >= word_arg_offset);
2267
2268 if (stack_offset != word_arg_offset) {
2269 if (stack_offset < 16) {
2270 if (src_offset == stack_offset) {
2271 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG1) | (src_offset >> 2)));
2272 *src = TMP_REG1;
2273 }
2274 else if (src_offset == word_arg_offset) {
2275 *src = 1 + (stack_offset >> 2);
2276 src_offset = stack_offset;
2277 }
2278 FAIL_IF(push_inst(compiler, MOV | (stack_offset << 10) | (word_arg_offset >> 2)));
2279 } else
2280 FAIL_IF(push_inst(compiler, data_transfer_insts[WORD_SIZE] | 0x800000 | RN(SLJIT_SP) | (word_arg_offset << 10) | (stack_offset - 16)));
2281 }
2282 break;
2283 }
2284
2285 types >>= SLJIT_DEF_SHIFT;
2286 }
2287
2288 return SLJIT_SUCCESS;
2289 }
2290
softfloat_post_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types)2291 static sljit_s32 softfloat_post_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
2292 {
2293 sljit_s32 stack_size = 0;
2294
2295 if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32)
2296 FAIL_IF(push_inst(compiler, VMOV | (0 << 16) | (0 << 12)));
2297 if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F64)
2298 FAIL_IF(push_inst(compiler, VMOV2 | (1 << 16) | (0 << 12) | 0));
2299
2300 arg_types >>= SLJIT_DEF_SHIFT;
2301
2302 while (arg_types) {
2303 switch (arg_types & SLJIT_DEF_MASK) {
2304 case SLJIT_ARG_TYPE_F32:
2305 stack_size += sizeof(sljit_f32);
2306 break;
2307 case SLJIT_ARG_TYPE_F64:
2308 if (stack_size & 0x7)
2309 stack_size += sizeof(sljit_sw);
2310 stack_size += sizeof(sljit_f64);
2311 break;
2312 default:
2313 stack_size += sizeof(sljit_sw);
2314 break;
2315 }
2316
2317 arg_types >>= SLJIT_DEF_SHIFT;
2318 }
2319
2320 if (stack_size <= 16)
2321 return SLJIT_SUCCESS;
2322
2323 return push_inst(compiler, ADD | RD(SLJIT_SP) | RN(SLJIT_SP) | SRC2_IMM | (((stack_size - 16) + 0x7) & ~0x7));
2324 }
2325
2326 #else /* !__SOFTFP__ */
2327
hardfloat_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types)2328 static sljit_s32 hardfloat_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
2329 {
2330 sljit_u32 remap = 0;
2331 sljit_u32 offset = 0;
2332 sljit_u32 new_offset, mask;
2333
2334 /* Remove return value. */
2335 arg_types >>= SLJIT_DEF_SHIFT;
2336
2337 while (arg_types) {
2338 if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32) {
2339 new_offset = 0;
2340 mask = 1;
2341
2342 while (remap & mask) {
2343 new_offset++;
2344 mask <<= 1;
2345 }
2346 remap |= mask;
2347
2348 if (offset != new_offset)
2349 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMOV_F32,
2350 0, (new_offset >> 1) + 1, (offset >> 1) + 1, 0) | ((new_offset & 0x1) ? 0x400000 : 0)));
2351
2352 offset += 2;
2353 }
2354 else if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F64) {
2355 new_offset = 0;
2356 mask = 3;
2357
2358 while (remap & mask) {
2359 new_offset += 2;
2360 mask <<= 2;
2361 }
2362 remap |= mask;
2363
2364 if (offset != new_offset)
2365 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMOV_F32, SLJIT_F32_OP, (new_offset >> 1) + 1, (offset >> 1) + 1, 0)));
2366
2367 offset += 2;
2368 }
2369 arg_types >>= SLJIT_DEF_SHIFT;
2370 }
2371
2372 return SLJIT_SUCCESS;
2373 }
2374
2375 #endif /* __SOFTFP__ */
2376
2377 #undef EMIT_FPU_OPERATION
2378
sljit_emit_call(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types)2379 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
2380 sljit_s32 arg_types)
2381 {
2382 #ifdef __SOFTFP__
2383 struct sljit_jump *jump;
2384 #endif
2385
2386 CHECK_ERROR_PTR();
2387 CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
2388
2389 #ifdef __SOFTFP__
2390 PTR_FAIL_IF(softfloat_call_with_args(compiler, arg_types, NULL));
2391
2392 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2393 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2394 compiler->skip_checks = 1;
2395 #endif
2396
2397 jump = sljit_emit_jump(compiler, type);
2398 PTR_FAIL_IF(jump == NULL);
2399
2400 PTR_FAIL_IF(softfloat_post_call_with_args(compiler, arg_types));
2401 return jump;
2402 #else /* !__SOFTFP__ */
2403 PTR_FAIL_IF(hardfloat_call_with_args(compiler, arg_types));
2404
2405 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2406 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2407 compiler->skip_checks = 1;
2408 #endif
2409
2410 return sljit_emit_jump(compiler, type);
2411 #endif /* __SOFTFP__ */
2412 }
2413
sljit_emit_ijump(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 src,sljit_sw srcw)2414 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_ijump(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 src, sljit_sw srcw)
2415 {
2416 struct sljit_jump *jump;
2417
2418 CHECK_ERROR();
2419 CHECK(check_sljit_emit_ijump(compiler, type, src, srcw));
2420 ADJUST_LOCAL_OFFSET(src, srcw);
2421
2422 SLJIT_ASSERT(reg_map[TMP_REG1] != 14);
2423
2424 if (!(src & SLJIT_IMM)) {
2425 if (FAST_IS_REG(src)) {
2426 SLJIT_ASSERT(reg_map[src] != 14);
2427 return push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(src));
2428 }
2429
2430 SLJIT_ASSERT(src & SLJIT_MEM);
2431 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG1, src, srcw, TMP_REG1));
2432 return push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1));
2433 }
2434
2435 /* These jumps are converted to jump/call instructions when possible. */
2436 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
2437 FAIL_IF(!jump);
2438 set_jump(jump, compiler, JUMP_ADDR | ((type >= SLJIT_FAST_CALL) ? IS_BL : 0));
2439 jump->u.target = srcw;
2440
2441 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2442 if (type >= SLJIT_FAST_CALL)
2443 FAIL_IF(prepare_blx(compiler));
2444 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));
2445 if (type >= SLJIT_FAST_CALL)
2446 FAIL_IF(emit_blx(compiler));
2447 #else
2448 FAIL_IF(emit_imm(compiler, TMP_REG1, 0));
2449 FAIL_IF(push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1)));
2450 #endif
2451 jump->addr = compiler->size;
2452 return SLJIT_SUCCESS;
2453 }
2454
sljit_emit_icall(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types,sljit_s32 src,sljit_sw srcw)2455 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
2456 sljit_s32 arg_types,
2457 sljit_s32 src, sljit_sw srcw)
2458 {
2459 CHECK_ERROR();
2460 CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
2461
2462 #ifdef __SOFTFP__
2463 if (src & SLJIT_MEM) {
2464 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG1, src, srcw, TMP_REG1));
2465 src = TMP_REG1;
2466 }
2467
2468 FAIL_IF(softfloat_call_with_args(compiler, arg_types, &src));
2469
2470 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2471 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2472 compiler->skip_checks = 1;
2473 #endif
2474
2475 FAIL_IF(sljit_emit_ijump(compiler, type, src, srcw));
2476
2477 return softfloat_post_call_with_args(compiler, arg_types);
2478 #else /* !__SOFTFP__ */
2479 FAIL_IF(hardfloat_call_with_args(compiler, arg_types));
2480
2481 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2482 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2483 compiler->skip_checks = 1;
2484 #endif
2485
2486 return sljit_emit_ijump(compiler, type, src, srcw);
2487 #endif /* __SOFTFP__ */
2488 }
2489
sljit_emit_op_flags(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 type)2490 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_flags(struct sljit_compiler *compiler, sljit_s32 op,
2491 sljit_s32 dst, sljit_sw dstw,
2492 sljit_s32 type)
2493 {
2494 sljit_s32 dst_reg, flags = GET_ALL_FLAGS(op);
2495 sljit_uw cc, ins;
2496
2497 CHECK_ERROR();
2498 CHECK(check_sljit_emit_op_flags(compiler, op, dst, dstw, type));
2499 ADJUST_LOCAL_OFFSET(dst, dstw);
2500
2501 op = GET_OPCODE(op);
2502 cc = get_cc(type & 0xff);
2503 dst_reg = FAST_IS_REG(dst) ? dst : TMP_REG1;
2504
2505 if (op < SLJIT_ADD) {
2506 FAIL_IF(push_inst(compiler, MOV | RD(dst_reg) | SRC2_IMM | 0));
2507 FAIL_IF(push_inst(compiler, ((MOV | RD(dst_reg) | SRC2_IMM | 1) & ~COND_MASK) | cc));
2508 if (dst & SLJIT_MEM)
2509 return emit_op_mem(compiler, WORD_SIZE, TMP_REG1, dst, dstw, TMP_REG2);
2510 return SLJIT_SUCCESS;
2511 }
2512
2513 ins = (op == SLJIT_AND ? AND : (op == SLJIT_OR ? ORR : EOR));
2514
2515 if (dst & SLJIT_MEM)
2516 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG1, dst, dstw, TMP_REG2));
2517
2518 FAIL_IF(push_inst(compiler, ((ins | RD(dst_reg) | RN(dst_reg) | SRC2_IMM | 1) & ~COND_MASK) | cc));
2519
2520 if (op == SLJIT_AND)
2521 FAIL_IF(push_inst(compiler, ((ins | RD(dst_reg) | RN(dst_reg) | SRC2_IMM | 0) & ~COND_MASK) | (cc ^ 0x10000000)));
2522
2523 if (dst & SLJIT_MEM)
2524 FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, dst, dstw, TMP_REG2));
2525
2526 if (flags & SLJIT_SET_Z)
2527 return push_inst(compiler, MOV | SET_FLAGS | RD(TMP_REG2) | RM(dst_reg));
2528 return SLJIT_SUCCESS;
2529 }
2530
sljit_emit_cmov(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 dst_reg,sljit_s32 src,sljit_sw srcw)2531 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_cmov(struct sljit_compiler *compiler, sljit_s32 type,
2532 sljit_s32 dst_reg,
2533 sljit_s32 src, sljit_sw srcw)
2534 {
2535 sljit_uw cc, tmp;
2536
2537 CHECK_ERROR();
2538 CHECK(check_sljit_emit_cmov(compiler, type, dst_reg, src, srcw));
2539
2540 dst_reg &= ~SLJIT_I32_OP;
2541
2542 cc = get_cc(type & 0xff);
2543
2544 if (SLJIT_UNLIKELY(src & SLJIT_IMM)) {
2545 tmp = get_imm(srcw);
2546 if (tmp)
2547 return push_inst(compiler, ((MOV | RD(dst_reg) | tmp) & ~COND_MASK) | cc);
2548
2549 tmp = get_imm(~srcw);
2550 if (tmp)
2551 return push_inst(compiler, ((MVN | RD(dst_reg) | tmp) & ~COND_MASK) | cc);
2552
2553 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
2554 tmp = (sljit_uw) srcw;
2555 FAIL_IF(push_inst(compiler, (MOVW & ~COND_MASK) | cc | RD(dst_reg) | ((tmp << 4) & 0xf0000) | (tmp & 0xfff)));
2556 if (tmp <= 0xffff)
2557 return SLJIT_SUCCESS;
2558 return push_inst(compiler, (MOVT & ~COND_MASK) | cc | RD(dst_reg) | ((tmp >> 12) & 0xf0000) | ((tmp >> 16) & 0xfff));
2559 #else
2560 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
2561 src = TMP_REG1;
2562 #endif
2563 }
2564
2565 return push_inst(compiler, ((MOV | RD(dst_reg) | RM(src)) & ~COND_MASK) | cc);
2566 }
2567
sljit_emit_mem(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 reg,sljit_s32 mem,sljit_sw memw)2568 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_mem(struct sljit_compiler *compiler, sljit_s32 type,
2569 sljit_s32 reg,
2570 sljit_s32 mem, sljit_sw memw)
2571 {
2572 sljit_s32 flags;
2573 sljit_uw is_type1_transfer, inst;
2574
2575 CHECK_ERROR();
2576 CHECK(check_sljit_emit_mem(compiler, type, reg, mem, memw));
2577
2578 is_type1_transfer = 1;
2579
2580 switch (type & 0xff) {
2581 case SLJIT_MOV:
2582 case SLJIT_MOV_U32:
2583 case SLJIT_MOV_S32:
2584 case SLJIT_MOV_P:
2585 flags = WORD_SIZE;
2586 break;
2587 case SLJIT_MOV_U8:
2588 flags = BYTE_SIZE;
2589 break;
2590 case SLJIT_MOV_S8:
2591 if (!(type & SLJIT_MEM_STORE))
2592 is_type1_transfer = 0;
2593 flags = BYTE_SIZE | SIGNED;
2594 break;
2595 case SLJIT_MOV_U16:
2596 is_type1_transfer = 0;
2597 flags = HALF_SIZE;
2598 break;
2599 case SLJIT_MOV_S16:
2600 is_type1_transfer = 0;
2601 flags = HALF_SIZE | SIGNED;
2602 break;
2603 default:
2604 SLJIT_UNREACHABLE();
2605 flags = WORD_SIZE;
2606 break;
2607 }
2608
2609 if (!(type & SLJIT_MEM_STORE))
2610 flags |= LOAD_DATA;
2611
2612 SLJIT_ASSERT(is_type1_transfer == !!IS_TYPE1_TRANSFER(flags));
2613
2614 if (SLJIT_UNLIKELY(mem & OFFS_REG_MASK)) {
2615 if (!is_type1_transfer && memw != 0)
2616 return SLJIT_ERR_UNSUPPORTED;
2617 }
2618 else {
2619 if (is_type1_transfer) {
2620 if (memw > 4095 && memw < -4095)
2621 return SLJIT_ERR_UNSUPPORTED;
2622 }
2623 else {
2624 if (memw > 255 && memw < -255)
2625 return SLJIT_ERR_UNSUPPORTED;
2626 }
2627 }
2628
2629 if (type & SLJIT_MEM_SUPP)
2630 return SLJIT_SUCCESS;
2631
2632 if (SLJIT_UNLIKELY(mem & OFFS_REG_MASK)) {
2633 memw &= 0x3;
2634
2635 inst = EMIT_DATA_TRANSFER(flags, 1, reg, mem & REG_MASK, RM(OFFS_REG(mem)) | (memw << 7));
2636
2637 if (is_type1_transfer)
2638 inst |= (1 << 25);
2639
2640 if (type & SLJIT_MEM_PRE)
2641 inst |= (1 << 21);
2642 else
2643 inst ^= (1 << 24);
2644
2645 return push_inst(compiler, inst);
2646 }
2647
2648 inst = EMIT_DATA_TRANSFER(flags, 0, reg, mem & REG_MASK, 0);
2649
2650 if (type & SLJIT_MEM_PRE)
2651 inst |= (1 << 21);
2652 else
2653 inst ^= (1 << 24);
2654
2655 if (is_type1_transfer) {
2656 if (memw >= 0)
2657 inst |= (1 << 23);
2658 else
2659 memw = -memw;
2660
2661 return push_inst(compiler, inst | memw);
2662 }
2663
2664 if (memw >= 0)
2665 inst |= (1 << 23);
2666 else
2667 memw = -memw;
2668
2669 return push_inst(compiler, inst | TYPE2_TRANSFER_IMM(memw));
2670 }
2671
sljit_emit_const(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw,sljit_sw init_value)2672 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw, sljit_sw init_value)
2673 {
2674 struct sljit_const *const_;
2675 sljit_s32 dst_r;
2676
2677 CHECK_ERROR_PTR();
2678 CHECK_PTR(check_sljit_emit_const(compiler, dst, dstw, init_value));
2679 ADJUST_LOCAL_OFFSET(dst, dstw);
2680
2681 dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG2;
2682
2683 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2684 PTR_FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1, dst_r, TMP_PC, 0), init_value));
2685 compiler->patches++;
2686 #else
2687 PTR_FAIL_IF(emit_imm(compiler, dst_r, init_value));
2688 #endif
2689
2690 const_ = (struct sljit_const*)ensure_abuf(compiler, sizeof(struct sljit_const));
2691 PTR_FAIL_IF(!const_);
2692 set_const(const_, compiler);
2693
2694 if (dst & SLJIT_MEM)
2695 PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG2, dst, dstw, TMP_REG1));
2696 return const_;
2697 }
2698
sljit_emit_put_label(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw)2699 SLJIT_API_FUNC_ATTRIBUTE struct sljit_put_label* sljit_emit_put_label(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
2700 {
2701 struct sljit_put_label *put_label;
2702 sljit_s32 dst_r;
2703
2704 CHECK_ERROR_PTR();
2705 CHECK_PTR(check_sljit_emit_put_label(compiler, dst, dstw));
2706 ADJUST_LOCAL_OFFSET(dst, dstw);
2707
2708 dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG2;
2709
2710 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2711 PTR_FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1, dst_r, TMP_PC, 0), 0));
2712 compiler->patches++;
2713 #else
2714 PTR_FAIL_IF(emit_imm(compiler, dst_r, 0));
2715 #endif
2716
2717 put_label = (struct sljit_put_label*)ensure_abuf(compiler, sizeof(struct sljit_put_label));
2718 PTR_FAIL_IF(!put_label);
2719 set_put_label(put_label, compiler, 0);
2720
2721 if (dst & SLJIT_MEM)
2722 PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG2, dst, dstw, TMP_REG1));
2723 return put_label;
2724 }
2725
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_target,sljit_sw executable_offset)2726 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
2727 {
2728 inline_set_jump_addr(addr, executable_offset, new_target, 1);
2729 }
2730
sljit_set_const(sljit_uw addr,sljit_sw new_constant,sljit_sw executable_offset)2731 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
2732 {
2733 inline_set_const(addr, executable_offset, new_constant, 1);
2734 }
2735