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 }
671 }
672 }
673 else if ((*buf_ptr & 0xff000000) != PUSH_POOL) {
674 #endif
675 *code_ptr = *buf_ptr++;
676 if (next_addr == word_count) {
677 SLJIT_ASSERT(!label || label->size >= word_count);
678 SLJIT_ASSERT(!jump || jump->addr >= word_count);
679 SLJIT_ASSERT(!const_ || const_->addr >= word_count);
680 SLJIT_ASSERT(!put_label || put_label->addr >= word_count);
681
682 /* These structures are ordered by their address. */
683 if (jump && jump->addr == word_count) {
684 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
685 if (detect_jump_type(jump, code_ptr, code, executable_offset))
686 code_ptr--;
687 jump->addr = (sljit_uw)code_ptr;
688 #else
689 jump->addr = (sljit_uw)(code_ptr - 2);
690 if (detect_jump_type(jump, code_ptr, code, executable_offset))
691 code_ptr -= 2;
692 #endif
693 jump = jump->next;
694 }
695 if (label && label->size == word_count) {
696 /* code_ptr can be affected above. */
697 label->addr = (sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr + 1, executable_offset);
698 label->size = (code_ptr + 1) - code;
699 label = label->next;
700 }
701 if (const_ && const_->addr == word_count) {
702 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
703 const_->addr = (sljit_uw)code_ptr;
704 #else
705 const_->addr = (sljit_uw)(code_ptr - 1);
706 #endif
707 const_ = const_->next;
708 }
709 if (put_label && put_label->addr == word_count) {
710 SLJIT_ASSERT(put_label->label);
711 put_label->addr = (sljit_uw)code_ptr;
712 put_label = put_label->next;
713 }
714 next_addr = compute_next_addr(label, jump, const_, put_label);
715 }
716 code_ptr++;
717 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
718 }
719 else {
720 /* Fortunately, no need to shift. */
721 cpool_size = *buf_ptr++ & ~PUSH_POOL;
722 SLJIT_ASSERT(cpool_size > 0);
723 cpool_start_address = ALIGN_INSTRUCTION(code_ptr + 1);
724 cpool_current_index = patch_pc_relative_loads(last_pc_patch, code_ptr, cpool_start_address, cpool_size);
725 if (cpool_current_index > 0) {
726 /* Unconditional branch. */
727 *code_ptr = B | (((cpool_start_address - code_ptr) + cpool_current_index - 2) & ~PUSH_POOL);
728 code_ptr = cpool_start_address + cpool_current_index;
729 }
730 cpool_skip_alignment = CONST_POOL_ALIGNMENT - 1;
731 cpool_current_index = 0;
732 last_pc_patch = code_ptr;
733 }
734 #endif
735 } while (buf_ptr < buf_end);
736 buf = buf->next;
737 } while (buf);
738
739 SLJIT_ASSERT(!label);
740 SLJIT_ASSERT(!jump);
741 SLJIT_ASSERT(!const_);
742 SLJIT_ASSERT(!put_label);
743
744 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
745 SLJIT_ASSERT(cpool_size == 0);
746 if (compiler->cpool_fill > 0) {
747 cpool_start_address = ALIGN_INSTRUCTION(code_ptr);
748 cpool_current_index = patch_pc_relative_loads(last_pc_patch, code_ptr, cpool_start_address, compiler->cpool_fill);
749 if (cpool_current_index > 0)
750 code_ptr = cpool_start_address + cpool_current_index;
751
752 buf_ptr = compiler->cpool;
753 buf_end = buf_ptr + compiler->cpool_fill;
754 cpool_current_index = 0;
755 while (buf_ptr < buf_end) {
756 if (SLJIT_UNLIKELY(resolve_const_pool_index(compiler, &first_patch, cpool_current_index, cpool_start_address, buf_ptr))) {
757 SLJIT_FREE_EXEC(code);
758 compiler->error = SLJIT_ERR_ALLOC_FAILED;
759 return NULL;
760 }
761 buf_ptr++;
762 cpool_current_index++;
763 }
764 SLJIT_ASSERT(!first_patch);
765 }
766 #endif
767
768 jump = compiler->jumps;
769 while (jump) {
770 buf_ptr = (sljit_uw *)jump->addr;
771
772 if (jump->flags & PATCH_B) {
773 addr = (sljit_sw)SLJIT_ADD_EXEC_OFFSET(buf_ptr + 2, executable_offset);
774 if (!(jump->flags & JUMP_ADDR)) {
775 SLJIT_ASSERT(jump->flags & JUMP_LABEL);
776 SLJIT_ASSERT(((sljit_sw)jump->u.label->addr - addr) <= 0x01ffffff && ((sljit_sw)jump->u.label->addr - addr) >= -0x02000000);
777 *buf_ptr |= (((sljit_sw)jump->u.label->addr - addr) >> 2) & 0x00ffffff;
778 }
779 else {
780 SLJIT_ASSERT(((sljit_sw)jump->u.target - addr) <= 0x01ffffff && ((sljit_sw)jump->u.target - addr) >= -0x02000000);
781 *buf_ptr |= (((sljit_sw)jump->u.target - addr) >> 2) & 0x00ffffff;
782 }
783 }
784 else if (jump->flags & SLJIT_REWRITABLE_JUMP) {
785 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
786 jump->addr = (sljit_uw)code_ptr;
787 code_ptr[0] = (sljit_uw)buf_ptr;
788 code_ptr[1] = *buf_ptr;
789 inline_set_jump_addr((sljit_uw)code_ptr, executable_offset, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
790 code_ptr += 2;
791 #else
792 inline_set_jump_addr((sljit_uw)buf_ptr, executable_offset, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
793 #endif
794 }
795 else {
796 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
797 if (jump->flags & IS_BL)
798 buf_ptr--;
799 if (*buf_ptr & (1 << 23))
800 buf_ptr += ((*buf_ptr & 0xfff) >> 2) + 2;
801 else
802 buf_ptr += 1;
803 *buf_ptr = (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target;
804 #else
805 inline_set_jump_addr((sljit_uw)buf_ptr, executable_offset, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target, 0);
806 #endif
807 }
808 jump = jump->next;
809 }
810
811 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
812 const_ = compiler->consts;
813 while (const_) {
814 buf_ptr = (sljit_uw*)const_->addr;
815 const_->addr = (sljit_uw)code_ptr;
816
817 code_ptr[0] = (sljit_uw)buf_ptr;
818 code_ptr[1] = *buf_ptr;
819 if (*buf_ptr & (1 << 23))
820 buf_ptr += ((*buf_ptr & 0xfff) >> 2) + 2;
821 else
822 buf_ptr += 1;
823 /* Set the value again (can be a simple constant). */
824 inline_set_const((sljit_uw)code_ptr, executable_offset, *buf_ptr, 0);
825 code_ptr += 2;
826
827 const_ = const_->next;
828 }
829 #endif
830
831 put_label = compiler->put_labels;
832 while (put_label) {
833 addr = put_label->label->addr;
834 buf_ptr = (sljit_uw*)put_label->addr;
835
836 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
837 SLJIT_ASSERT((buf_ptr[0] & 0xffff0000) == 0xe59f0000);
838 buf_ptr[((buf_ptr[0] & 0xfff) >> 2) + 2] = addr;
839 #else
840 SLJIT_ASSERT((buf_ptr[-1] & 0xfff00000) == MOVW && (buf_ptr[0] & 0xfff00000) == MOVT);
841 buf_ptr[-1] |= ((addr << 4) & 0xf0000) | (addr & 0xfff);
842 buf_ptr[0] |= ((addr >> 12) & 0xf0000) | ((addr >> 16) & 0xfff);
843 #endif
844 put_label = put_label->next;
845 }
846
847 SLJIT_ASSERT(code_ptr - code <= (sljit_s32)size);
848
849 compiler->error = SLJIT_ERR_COMPILED;
850 compiler->executable_offset = executable_offset;
851 compiler->executable_size = (code_ptr - code) * sizeof(sljit_uw);
852
853 code = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(code, executable_offset);
854 code_ptr = (sljit_uw *)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
855
856 SLJIT_CACHE_FLUSH(code, code_ptr);
857 return code;
858 }
859
sljit_has_cpu_feature(sljit_s32 feature_type)860 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_has_cpu_feature(sljit_s32 feature_type)
861 {
862 switch (feature_type) {
863 case SLJIT_HAS_FPU:
864 #ifdef SLJIT_IS_FPU_AVAILABLE
865 return SLJIT_IS_FPU_AVAILABLE;
866 #else
867 /* Available by default. */
868 return 1;
869 #endif
870
871 case SLJIT_HAS_CLZ:
872 case SLJIT_HAS_CMOV:
873 return 1;
874
875 default:
876 return 0;
877 }
878 }
879
880 /* --------------------------------------------------------------------- */
881 /* Entry, exit */
882 /* --------------------------------------------------------------------- */
883
884 /* Creates an index in data_transfer_insts array. */
885 #define WORD_SIZE 0x00
886 #define BYTE_SIZE 0x01
887 #define HALF_SIZE 0x02
888 #define PRELOAD 0x03
889 #define SIGNED 0x04
890 #define LOAD_DATA 0x08
891
892 /* Flag bits for emit_op. */
893 #define ALLOW_IMM 0x10
894 #define ALLOW_INV_IMM 0x20
895 #define ALLOW_ANY_IMM (ALLOW_IMM | ALLOW_INV_IMM)
896
897 /* s/l - store/load (1 bit)
898 u/s - signed/unsigned (1 bit)
899 w/b/h/N - word/byte/half/NOT allowed (2 bit)
900 Storing signed and unsigned values are the same operations. */
901
902 static const sljit_uw data_transfer_insts[16] = {
903 /* s u w */ 0xe5000000 /* str */,
904 /* s u b */ 0xe5400000 /* strb */,
905 /* s u h */ 0xe10000b0 /* strh */,
906 /* s u N */ 0x00000000 /* not allowed */,
907 /* s s w */ 0xe5000000 /* str */,
908 /* s s b */ 0xe5400000 /* strb */,
909 /* s s h */ 0xe10000b0 /* strh */,
910 /* s s N */ 0x00000000 /* not allowed */,
911
912 /* l u w */ 0xe5100000 /* ldr */,
913 /* l u b */ 0xe5500000 /* ldrb */,
914 /* l u h */ 0xe11000b0 /* ldrh */,
915 /* l u p */ 0xf5500000 /* preload */,
916 /* l s w */ 0xe5100000 /* ldr */,
917 /* l s b */ 0xe11000d0 /* ldrsb */,
918 /* l s h */ 0xe11000f0 /* ldrsh */,
919 /* l s N */ 0x00000000 /* not allowed */,
920 };
921
922 #define EMIT_DATA_TRANSFER(type, add, target_reg, base_reg, arg) \
923 (data_transfer_insts[(type) & 0xf] | ((add) << 23) | RD(target_reg) | RN(base_reg) | (arg))
924
925 /* Normal ldr/str instruction.
926 Type2: ldrsb, ldrh, ldrsh */
927 #define IS_TYPE1_TRANSFER(type) \
928 (data_transfer_insts[(type) & 0xf] & 0x04000000)
929 #define TYPE2_TRANSFER_IMM(imm) \
930 (((imm) & 0xf) | (((imm) & 0xf0) << 4) | (1 << 22))
931
932 static sljit_s32 emit_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 inp_flags,
933 sljit_s32 dst, sljit_sw dstw,
934 sljit_s32 src1, sljit_sw src1w,
935 sljit_s32 src2, sljit_sw src2w);
936
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)937 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler,
938 sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
939 sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
940 {
941 sljit_s32 args, size, i, tmp;
942 sljit_uw push;
943
944 CHECK_ERROR();
945 CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
946 set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
947
948 /* Push saved registers, temporary registers
949 stmdb sp!, {..., lr} */
950 push = PUSH | (1 << 14);
951
952 tmp = saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - saveds) : SLJIT_FIRST_SAVED_REG;
953 for (i = SLJIT_S0; i >= tmp; i--)
954 push |= 1 << reg_map[i];
955
956 for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
957 push |= 1 << reg_map[i];
958
959 FAIL_IF(push_inst(compiler, push));
960
961 /* Stack must be aligned to 8 bytes: */
962 size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
963 local_size = ((size + local_size + 7) & ~7) - size;
964 compiler->local_size = local_size;
965 if (local_size > 0)
966 FAIL_IF(emit_op(compiler, SLJIT_SUB, ALLOW_IMM, SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, local_size));
967
968 args = get_arg_count(arg_types);
969
970 if (args >= 1)
971 FAIL_IF(push_inst(compiler, MOV | RD(SLJIT_S0) | RM(SLJIT_R0)));
972 if (args >= 2)
973 FAIL_IF(push_inst(compiler, MOV | RD(SLJIT_S1) | RM(SLJIT_R1)));
974 if (args >= 3)
975 FAIL_IF(push_inst(compiler, MOV | RD(SLJIT_S2) | RM(SLJIT_R2)));
976
977 return SLJIT_SUCCESS;
978 }
979
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)980 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler,
981 sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
982 sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
983 {
984 sljit_s32 size;
985
986 CHECK_ERROR();
987 CHECK(check_sljit_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
988 set_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
989
990 size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
991 compiler->local_size = ((size + local_size + 7) & ~7) - size;
992 return SLJIT_SUCCESS;
993 }
994
sljit_emit_return(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src,sljit_sw srcw)995 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw)
996 {
997 sljit_s32 i, tmp;
998 sljit_uw pop;
999
1000 CHECK_ERROR();
1001 CHECK(check_sljit_emit_return(compiler, op, src, srcw));
1002
1003 FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
1004
1005 if (compiler->local_size > 0)
1006 FAIL_IF(emit_op(compiler, SLJIT_ADD, ALLOW_IMM, SLJIT_SP, 0, SLJIT_SP, 0, SLJIT_IMM, compiler->local_size));
1007
1008 /* Push saved registers, temporary registers
1009 ldmia sp!, {..., pc} */
1010 pop = POP | (1 << 15);
1011
1012 tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG;
1013 for (i = SLJIT_S0; i >= tmp; i--)
1014 pop |= 1 << reg_map[i];
1015
1016 for (i = compiler->scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
1017 pop |= 1 << reg_map[i];
1018
1019 return push_inst(compiler, pop);
1020 }
1021
1022 /* --------------------------------------------------------------------- */
1023 /* Operators */
1024 /* --------------------------------------------------------------------- */
1025
1026 /* flags: */
1027 /* Arguments are swapped. */
1028 #define ARGS_SWAPPED 0x01
1029 /* Inverted immediate. */
1030 #define INV_IMM 0x02
1031 /* Source and destination is register. */
1032 #define MOVE_REG_CONV 0x04
1033 /* Unused return value. */
1034 #define UNUSED_RETURN 0x08
1035 /* SET_FLAGS must be (1 << 20) as it is also the value of S bit (can be used for optimization). */
1036 #define SET_FLAGS (1 << 20)
1037 /* dst: reg
1038 src1: reg
1039 src2: reg or imm (if allowed)
1040 SRC2_IMM must be (1 << 25) as it is also the value of I bit (can be used for optimization). */
1041 #define SRC2_IMM (1 << 25)
1042
1043 #define EMIT_SHIFT_INS_AND_RETURN(opcode) \
1044 SLJIT_ASSERT(!(flags & INV_IMM) && !(src2 & SRC2_IMM)); \
1045 if (compiler->shift_imm != 0x20) { \
1046 SLJIT_ASSERT(src1 == TMP_REG1); \
1047 SLJIT_ASSERT(!(flags & ARGS_SWAPPED)); \
1048 \
1049 if (compiler->shift_imm != 0) \
1050 return push_inst(compiler, MOV | (flags & SET_FLAGS) | \
1051 RD(dst) | (compiler->shift_imm << 7) | (opcode << 5) | RM(src2)); \
1052 return push_inst(compiler, MOV | (flags & SET_FLAGS) | RD(dst) | RM(src2)); \
1053 } \
1054 return push_inst(compiler, MOV | (flags & SET_FLAGS) | RD(dst) | \
1055 (reg_map[(flags & ARGS_SWAPPED) ? src1 : src2] << 8) | (opcode << 5) | 0x10 | RM((flags & ARGS_SWAPPED) ? src2 : src1));
1056
emit_single_op(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 flags,sljit_s32 dst,sljit_s32 src1,sljit_s32 src2)1057 static SLJIT_INLINE sljit_s32 emit_single_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 flags,
1058 sljit_s32 dst, sljit_s32 src1, sljit_s32 src2)
1059 {
1060 switch (GET_OPCODE(op)) {
1061 case SLJIT_MOV:
1062 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1063 if (dst != src2) {
1064 if (src2 & SRC2_IMM) {
1065 return push_inst(compiler, ((flags & INV_IMM) ? MVN : MOV) | RD(dst) | src2);
1066 }
1067 return push_inst(compiler, MOV | RD(dst) | RM(src2));
1068 }
1069 return SLJIT_SUCCESS;
1070
1071 case SLJIT_MOV_U8:
1072 case SLJIT_MOV_S8:
1073 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1074 if (flags & MOVE_REG_CONV) {
1075 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1076 if (op == SLJIT_MOV_U8)
1077 return push_inst(compiler, AND | RD(dst) | RN(src2) | SRC2_IMM | 0xff);
1078 FAIL_IF(push_inst(compiler, MOV | RD(dst) | (24 << 7) | RM(src2)));
1079 return push_inst(compiler, MOV | RD(dst) | (24 << 7) | (op == SLJIT_MOV_U8 ? 0x20 : 0x40) | RM(dst));
1080 #else
1081 return push_inst(compiler, (op == SLJIT_MOV_U8 ? UXTB : SXTB) | RD(dst) | RM(src2));
1082 #endif
1083 }
1084 else if (dst != src2) {
1085 SLJIT_ASSERT(src2 & SRC2_IMM);
1086 return push_inst(compiler, ((flags & INV_IMM) ? MVN : MOV) | RD(dst) | src2);
1087 }
1088 return SLJIT_SUCCESS;
1089
1090 case SLJIT_MOV_U16:
1091 case SLJIT_MOV_S16:
1092 SLJIT_ASSERT(src1 == TMP_REG1 && !(flags & ARGS_SWAPPED));
1093 if (flags & MOVE_REG_CONV) {
1094 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1095 FAIL_IF(push_inst(compiler, MOV | RD(dst) | (16 << 7) | RM(src2)));
1096 return push_inst(compiler, MOV | RD(dst) | (16 << 7) | (op == SLJIT_MOV_U16 ? 0x20 : 0x40) | RM(dst));
1097 #else
1098 return push_inst(compiler, (op == SLJIT_MOV_U16 ? UXTH : SXTH) | RD(dst) | RM(src2));
1099 #endif
1100 }
1101 else if (dst != src2) {
1102 SLJIT_ASSERT(src2 & SRC2_IMM);
1103 return push_inst(compiler, ((flags & INV_IMM) ? MVN : MOV) | RD(dst) | src2);
1104 }
1105 return SLJIT_SUCCESS;
1106
1107 case SLJIT_NOT:
1108 if (src2 & SRC2_IMM) {
1109 return push_inst(compiler, ((flags & INV_IMM) ? MOV : MVN) | (flags & SET_FLAGS) | RD(dst) | src2);
1110 }
1111 return push_inst(compiler, MVN | (flags & SET_FLAGS) | RD(dst) | RM(src2));
1112
1113 case SLJIT_CLZ:
1114 SLJIT_ASSERT(!(flags & INV_IMM));
1115 SLJIT_ASSERT(!(src2 & SRC2_IMM));
1116 FAIL_IF(push_inst(compiler, CLZ | RD(dst) | RM(src2)));
1117 return SLJIT_SUCCESS;
1118
1119 case SLJIT_ADD:
1120 SLJIT_ASSERT(!(flags & INV_IMM));
1121 if ((flags & (UNUSED_RETURN | SET_FLAGS)) == (UNUSED_RETURN | SET_FLAGS) && !(flags & ARGS_SWAPPED))
1122 return push_inst(compiler, CMN | SET_FLAGS | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1123 return push_inst(compiler, ADD | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1124
1125 case SLJIT_ADDC:
1126 SLJIT_ASSERT(!(flags & INV_IMM));
1127 return push_inst(compiler, ADC | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1128
1129 case SLJIT_SUB:
1130 SLJIT_ASSERT(!(flags & INV_IMM));
1131 if ((flags & (UNUSED_RETURN | SET_FLAGS)) == (UNUSED_RETURN | SET_FLAGS) && !(flags & ARGS_SWAPPED))
1132 return push_inst(compiler, CMP | SET_FLAGS | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1133 return push_inst(compiler, (!(flags & ARGS_SWAPPED) ? SUB : RSB) | (flags & SET_FLAGS)
1134 | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1135
1136 case SLJIT_SUBC:
1137 SLJIT_ASSERT(!(flags & INV_IMM));
1138 return push_inst(compiler, (!(flags & ARGS_SWAPPED) ? SBC : RSC) | (flags & SET_FLAGS)
1139 | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1140
1141 case SLJIT_MUL:
1142 SLJIT_ASSERT(!(flags & INV_IMM));
1143 SLJIT_ASSERT(!(src2 & SRC2_IMM));
1144
1145 if (!HAS_FLAGS(op))
1146 return push_inst(compiler, MUL | (reg_map[dst] << 16) | (reg_map[src2] << 8) | reg_map[src1]);
1147
1148 FAIL_IF(push_inst(compiler, SMULL | (reg_map[TMP_REG1] << 16) | (reg_map[dst] << 12) | (reg_map[src2] << 8) | reg_map[src1]));
1149
1150 /* cmp TMP_REG1, dst asr #31. */
1151 return push_inst(compiler, CMP | SET_FLAGS | RN(TMP_REG1) | RM(dst) | 0xfc0);
1152
1153 case SLJIT_AND:
1154 return push_inst(compiler, (!(flags & INV_IMM) ? AND : BIC) | (flags & SET_FLAGS)
1155 | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1156
1157 case SLJIT_OR:
1158 SLJIT_ASSERT(!(flags & INV_IMM));
1159 return push_inst(compiler, ORR | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1160
1161 case SLJIT_XOR:
1162 SLJIT_ASSERT(!(flags & INV_IMM));
1163 return push_inst(compiler, EOR | (flags & SET_FLAGS) | RD(dst) | RN(src1) | ((src2 & SRC2_IMM) ? src2 : RM(src2)));
1164
1165 case SLJIT_SHL:
1166 EMIT_SHIFT_INS_AND_RETURN(0);
1167
1168 case SLJIT_LSHR:
1169 EMIT_SHIFT_INS_AND_RETURN(1);
1170
1171 case SLJIT_ASHR:
1172 EMIT_SHIFT_INS_AND_RETURN(2);
1173 }
1174
1175 SLJIT_UNREACHABLE();
1176 return SLJIT_SUCCESS;
1177 }
1178
1179 #undef EMIT_SHIFT_INS_AND_RETURN
1180
1181 /* Tests whether the immediate can be stored in the 12 bit imm field.
1182 Returns with 0 if not possible. */
get_imm(sljit_uw imm)1183 static sljit_uw get_imm(sljit_uw imm)
1184 {
1185 sljit_s32 rol;
1186
1187 if (imm <= 0xff)
1188 return SRC2_IMM | imm;
1189
1190 if (!(imm & 0xff000000)) {
1191 imm <<= 8;
1192 rol = 8;
1193 }
1194 else {
1195 imm = (imm << 24) | (imm >> 8);
1196 rol = 0;
1197 }
1198
1199 if (!(imm & 0xff000000)) {
1200 imm <<= 8;
1201 rol += 4;
1202 }
1203
1204 if (!(imm & 0xf0000000)) {
1205 imm <<= 4;
1206 rol += 2;
1207 }
1208
1209 if (!(imm & 0xc0000000)) {
1210 imm <<= 2;
1211 rol += 1;
1212 }
1213
1214 if (!(imm & 0x00ffffff))
1215 return SRC2_IMM | (imm >> 24) | (rol << 8);
1216 else
1217 return 0;
1218 }
1219
1220 #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)1221 static sljit_s32 generate_int(struct sljit_compiler *compiler, sljit_s32 reg, sljit_uw imm, sljit_s32 positive)
1222 {
1223 sljit_uw mask;
1224 sljit_uw imm1;
1225 sljit_uw imm2;
1226 sljit_s32 rol;
1227
1228 /* Step1: Search a zero byte (8 continous zero bit). */
1229 mask = 0xff000000;
1230 rol = 8;
1231 while(1) {
1232 if (!(imm & mask)) {
1233 /* Rol imm by rol. */
1234 imm = (imm << rol) | (imm >> (32 - rol));
1235 /* Calculate arm rol. */
1236 rol = 4 + (rol >> 1);
1237 break;
1238 }
1239 rol += 2;
1240 mask >>= 2;
1241 if (mask & 0x3) {
1242 /* rol by 8. */
1243 imm = (imm << 8) | (imm >> 24);
1244 mask = 0xff00;
1245 rol = 24;
1246 while (1) {
1247 if (!(imm & mask)) {
1248 /* Rol imm by rol. */
1249 imm = (imm << rol) | (imm >> (32 - rol));
1250 /* Calculate arm rol. */
1251 rol = (rol >> 1) - 8;
1252 break;
1253 }
1254 rol += 2;
1255 mask >>= 2;
1256 if (mask & 0x3)
1257 return 0;
1258 }
1259 break;
1260 }
1261 }
1262
1263 /* The low 8 bit must be zero. */
1264 SLJIT_ASSERT(!(imm & 0xff));
1265
1266 if (!(imm & 0xff000000)) {
1267 imm1 = SRC2_IMM | ((imm >> 16) & 0xff) | (((rol + 4) & 0xf) << 8);
1268 imm2 = SRC2_IMM | ((imm >> 8) & 0xff) | (((rol + 8) & 0xf) << 8);
1269 }
1270 else if (imm & 0xc0000000) {
1271 imm1 = SRC2_IMM | ((imm >> 24) & 0xff) | ((rol & 0xf) << 8);
1272 imm <<= 8;
1273 rol += 4;
1274
1275 if (!(imm & 0xff000000)) {
1276 imm <<= 8;
1277 rol += 4;
1278 }
1279
1280 if (!(imm & 0xf0000000)) {
1281 imm <<= 4;
1282 rol += 2;
1283 }
1284
1285 if (!(imm & 0xc0000000)) {
1286 imm <<= 2;
1287 rol += 1;
1288 }
1289
1290 if (!(imm & 0x00ffffff))
1291 imm2 = SRC2_IMM | (imm >> 24) | ((rol & 0xf) << 8);
1292 else
1293 return 0;
1294 }
1295 else {
1296 if (!(imm & 0xf0000000)) {
1297 imm <<= 4;
1298 rol += 2;
1299 }
1300
1301 if (!(imm & 0xc0000000)) {
1302 imm <<= 2;
1303 rol += 1;
1304 }
1305
1306 imm1 = SRC2_IMM | ((imm >> 24) & 0xff) | ((rol & 0xf) << 8);
1307 imm <<= 8;
1308 rol += 4;
1309
1310 if (!(imm & 0xf0000000)) {
1311 imm <<= 4;
1312 rol += 2;
1313 }
1314
1315 if (!(imm & 0xc0000000)) {
1316 imm <<= 2;
1317 rol += 1;
1318 }
1319
1320 if (!(imm & 0x00ffffff))
1321 imm2 = SRC2_IMM | (imm >> 24) | ((rol & 0xf) << 8);
1322 else
1323 return 0;
1324 }
1325
1326 FAIL_IF(push_inst(compiler, (positive ? MOV : MVN) | RD(reg) | imm1));
1327 FAIL_IF(push_inst(compiler, (positive ? ORR : BIC) | RD(reg) | RN(reg) | imm2));
1328 return 1;
1329 }
1330 #endif
1331
load_immediate(struct sljit_compiler * compiler,sljit_s32 reg,sljit_uw imm)1332 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 reg, sljit_uw imm)
1333 {
1334 sljit_uw tmp;
1335
1336 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
1337 if (!(imm & ~0xffff))
1338 return push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff));
1339 #endif
1340
1341 /* Create imm by 1 inst. */
1342 tmp = get_imm(imm);
1343 if (tmp)
1344 return push_inst(compiler, MOV | RD(reg) | tmp);
1345
1346 tmp = get_imm(~imm);
1347 if (tmp)
1348 return push_inst(compiler, MVN | RD(reg) | tmp);
1349
1350 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
1351 /* Create imm by 2 inst. */
1352 FAIL_IF(generate_int(compiler, reg, imm, 1));
1353 FAIL_IF(generate_int(compiler, reg, ~imm, 0));
1354
1355 /* Load integer. */
1356 return push_inst_with_literal(compiler, EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1, reg, TMP_PC, 0), imm);
1357 #else
1358 FAIL_IF(push_inst(compiler, MOVW | RD(reg) | ((imm << 4) & 0xf0000) | (imm & 0xfff)));
1359 if (imm <= 0xffff)
1360 return SLJIT_SUCCESS;
1361 return push_inst(compiler, MOVT | RD(reg) | ((imm >> 12) & 0xf0000) | ((imm >> 16) & 0xfff));
1362 #endif
1363 }
1364
emit_op_mem(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 reg,sljit_s32 arg,sljit_sw argw,sljit_s32 tmp_reg)1365 static SLJIT_INLINE sljit_s32 emit_op_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg,
1366 sljit_s32 arg, sljit_sw argw, sljit_s32 tmp_reg)
1367 {
1368 sljit_uw imm, offset_reg;
1369 sljit_uw is_type1_transfer = IS_TYPE1_TRANSFER(flags);
1370
1371 SLJIT_ASSERT (arg & SLJIT_MEM);
1372 SLJIT_ASSERT((arg & REG_MASK) != tmp_reg);
1373
1374 if ((arg & REG_MASK) == SLJIT_UNUSED) {
1375 if (is_type1_transfer) {
1376 FAIL_IF(load_immediate(compiler, tmp_reg, argw & ~0xfff));
1377 argw &= 0xfff;
1378 }
1379 else {
1380 FAIL_IF(load_immediate(compiler, tmp_reg, argw & ~0xff));
1381 argw &= 0xff;
1382 }
1383
1384 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, tmp_reg,
1385 is_type1_transfer ? argw : TYPE2_TRANSFER_IMM(argw)));
1386 }
1387
1388 if (arg & OFFS_REG_MASK) {
1389 offset_reg = OFFS_REG(arg);
1390 arg &= REG_MASK;
1391 argw &= 0x3;
1392
1393 if (argw != 0 && !is_type1_transfer) {
1394 FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg) | RM(offset_reg) | (argw << 7)));
1395 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, tmp_reg, TYPE2_TRANSFER_IMM(0)));
1396 }
1397
1398 /* Bit 25: RM is offset. */
1399 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg,
1400 RM(offset_reg) | (is_type1_transfer ? (1 << 25) : 0) | (argw << 7)));
1401 }
1402
1403 arg &= REG_MASK;
1404
1405 if (is_type1_transfer) {
1406 if (argw > 0xfff) {
1407 imm = get_imm(argw & ~0xfff);
1408 if (imm) {
1409 FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg) | imm));
1410 argw = argw & 0xfff;
1411 arg = tmp_reg;
1412 }
1413 }
1414 else if (argw < -0xfff) {
1415 imm = get_imm(-argw & ~0xfff);
1416 if (imm) {
1417 FAIL_IF(push_inst(compiler, SUB | RD(tmp_reg) | RN(arg) | imm));
1418 argw = -(-argw & 0xfff);
1419 arg = tmp_reg;
1420 }
1421 }
1422
1423 if (argw >= 0 && argw <= 0xfff)
1424 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg, argw));
1425
1426 if (argw < 0 && argw >= -0xfff)
1427 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 0, reg, arg, -argw));
1428 }
1429 else {
1430 if (argw > 0xff) {
1431 imm = get_imm(argw & ~0xff);
1432 if (imm) {
1433 FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg) | imm));
1434 argw = argw & 0xff;
1435 arg = tmp_reg;
1436 }
1437 }
1438 else if (argw < -0xff) {
1439 imm = get_imm(-argw & ~0xff);
1440 if (imm) {
1441 FAIL_IF(push_inst(compiler, SUB | RD(tmp_reg) | RN(arg) | imm));
1442 argw = -(-argw & 0xff);
1443 arg = tmp_reg;
1444 }
1445 }
1446
1447 if (argw >= 0 && argw <= 0xff)
1448 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg, TYPE2_TRANSFER_IMM(argw)));
1449
1450 if (argw < 0 && argw >= -0xff) {
1451 argw = -argw;
1452 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 0, reg, arg, TYPE2_TRANSFER_IMM(argw)));
1453 }
1454 }
1455
1456 FAIL_IF(load_immediate(compiler, tmp_reg, argw));
1457 return push_inst(compiler, EMIT_DATA_TRANSFER(flags, 1, reg, arg,
1458 RM(tmp_reg) | (is_type1_transfer ? (1 << 25) : 0)));
1459 }
1460
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)1461 static sljit_s32 emit_op(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 inp_flags,
1462 sljit_s32 dst, sljit_sw dstw,
1463 sljit_s32 src1, sljit_sw src1w,
1464 sljit_s32 src2, sljit_sw src2w)
1465 {
1466 /* src1 is reg or TMP_REG1
1467 src2 is reg, TMP_REG2, or imm
1468 result goes to TMP_REG2, so put result can use TMP_REG1. */
1469
1470 /* We prefers register and simple consts. */
1471 sljit_s32 dst_reg;
1472 sljit_s32 src1_reg;
1473 sljit_s32 src2_reg;
1474 sljit_s32 flags = HAS_FLAGS(op) ? SET_FLAGS : 0;
1475
1476 /* Destination check. */
1477 if (SLJIT_UNLIKELY(dst == SLJIT_UNUSED))
1478 flags |= UNUSED_RETURN;
1479
1480 SLJIT_ASSERT(!(inp_flags & ALLOW_INV_IMM) || (inp_flags & ALLOW_IMM));
1481
1482 src2_reg = 0;
1483
1484 do {
1485 if (!(inp_flags & ALLOW_IMM))
1486 break;
1487
1488 if (src2 & SLJIT_IMM) {
1489 src2_reg = get_imm(src2w);
1490 if (src2_reg)
1491 break;
1492 if (inp_flags & ALLOW_INV_IMM) {
1493 src2_reg = get_imm(~src2w);
1494 if (src2_reg) {
1495 flags |= INV_IMM;
1496 break;
1497 }
1498 }
1499 if (GET_OPCODE(op) == SLJIT_ADD) {
1500 src2_reg = get_imm(-src2w);
1501 if (src2_reg) {
1502 op = SLJIT_SUB | GET_ALL_FLAGS(op);
1503 break;
1504 }
1505 }
1506 if (GET_OPCODE(op) == SLJIT_SUB) {
1507 src2_reg = get_imm(-src2w);
1508 if (src2_reg) {
1509 op = SLJIT_ADD | GET_ALL_FLAGS(op);
1510 break;
1511 }
1512 }
1513 }
1514
1515 if (src1 & SLJIT_IMM) {
1516 src2_reg = get_imm(src1w);
1517 if (src2_reg) {
1518 flags |= ARGS_SWAPPED;
1519 src1 = src2;
1520 src1w = src2w;
1521 break;
1522 }
1523 if (inp_flags & ALLOW_INV_IMM) {
1524 src2_reg = get_imm(~src1w);
1525 if (src2_reg) {
1526 flags |= ARGS_SWAPPED | INV_IMM;
1527 src1 = src2;
1528 src1w = src2w;
1529 break;
1530 }
1531 }
1532 if (GET_OPCODE(op) == SLJIT_ADD) {
1533 src2_reg = get_imm(-src1w);
1534 if (src2_reg) {
1535 /* Note: add is commutative operation. */
1536 src1 = src2;
1537 src1w = src2w;
1538 op = SLJIT_SUB | GET_ALL_FLAGS(op);
1539 break;
1540 }
1541 }
1542 }
1543 } while(0);
1544
1545 /* Source 1. */
1546 if (FAST_IS_REG(src1))
1547 src1_reg = src1;
1548 else if (src1 & SLJIT_MEM) {
1549 FAIL_IF(emit_op_mem(compiler, inp_flags | LOAD_DATA, TMP_REG1, src1, src1w, TMP_REG1));
1550 src1_reg = TMP_REG1;
1551 }
1552 else {
1553 FAIL_IF(load_immediate(compiler, TMP_REG1, src1w));
1554 src1_reg = TMP_REG1;
1555 }
1556
1557 /* Destination. */
1558 dst_reg = SLOW_IS_REG(dst) ? dst : TMP_REG2;
1559
1560 if (op <= SLJIT_MOV_P) {
1561 if (dst & SLJIT_MEM) {
1562 if (inp_flags & BYTE_SIZE)
1563 inp_flags &= ~SIGNED;
1564
1565 if (FAST_IS_REG(src2))
1566 return emit_op_mem(compiler, inp_flags, src2, dst, dstw, TMP_REG2);
1567 }
1568
1569 if (FAST_IS_REG(src2) && dst_reg != TMP_REG2)
1570 flags |= MOVE_REG_CONV;
1571 }
1572
1573 /* Source 2. */
1574 if (src2_reg == 0) {
1575 src2_reg = (op <= SLJIT_MOV_P) ? dst_reg : TMP_REG2;
1576
1577 if (FAST_IS_REG(src2))
1578 src2_reg = src2;
1579 else if (src2 & SLJIT_MEM)
1580 FAIL_IF(emit_op_mem(compiler, inp_flags | LOAD_DATA, src2_reg, src2, src2w, TMP_REG2));
1581 else
1582 FAIL_IF(load_immediate(compiler, src2_reg, src2w));
1583 }
1584
1585 FAIL_IF(emit_single_op(compiler, op, flags, dst_reg, src1_reg, src2_reg));
1586
1587 if (!(dst & SLJIT_MEM))
1588 return SLJIT_SUCCESS;
1589
1590 return emit_op_mem(compiler, inp_flags, dst_reg, dst, dstw, TMP_REG1);
1591 }
1592
1593 #ifdef __cplusplus
1594 extern "C" {
1595 #endif
1596
1597 #if defined(__GNUC__)
1598 extern unsigned int __aeabi_uidivmod(unsigned int numerator, unsigned int denominator);
1599 extern int __aeabi_idivmod(int numerator, int denominator);
1600 #else
1601 #error "Software divmod functions are needed"
1602 #endif
1603
1604 #ifdef __cplusplus
1605 }
1606 #endif
1607
sljit_emit_op0(struct sljit_compiler * compiler,sljit_s32 op)1608 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op0(struct sljit_compiler *compiler, sljit_s32 op)
1609 {
1610 sljit_sw saved_reg_list[3];
1611 sljit_sw saved_reg_count;
1612
1613 CHECK_ERROR();
1614 CHECK(check_sljit_emit_op0(compiler, op));
1615
1616 op = GET_OPCODE(op);
1617 switch (op) {
1618 case SLJIT_BREAKPOINT:
1619 FAIL_IF(push_inst(compiler, BKPT));
1620 break;
1621 case SLJIT_NOP:
1622 FAIL_IF(push_inst(compiler, NOP));
1623 break;
1624 case SLJIT_LMUL_UW:
1625 case SLJIT_LMUL_SW:
1626 return push_inst(compiler, (op == SLJIT_LMUL_UW ? UMULL : SMULL)
1627 | (reg_map[SLJIT_R1] << 16)
1628 | (reg_map[SLJIT_R0] << 12)
1629 | (reg_map[SLJIT_R0] << 8)
1630 | reg_map[SLJIT_R1]);
1631 case SLJIT_DIVMOD_UW:
1632 case SLJIT_DIVMOD_SW:
1633 case SLJIT_DIV_UW:
1634 case SLJIT_DIV_SW:
1635 SLJIT_COMPILE_ASSERT((SLJIT_DIVMOD_UW & 0x2) == 0 && SLJIT_DIV_UW - 0x2 == SLJIT_DIVMOD_UW, bad_div_opcode_assignments);
1636 SLJIT_ASSERT(reg_map[2] == 1 && reg_map[3] == 2 && reg_map[4] == 3);
1637
1638 saved_reg_count = 0;
1639 if (compiler->scratches >= 4)
1640 saved_reg_list[saved_reg_count++] = 3;
1641 if (compiler->scratches >= 3)
1642 saved_reg_list[saved_reg_count++] = 2;
1643 if (op >= SLJIT_DIV_UW)
1644 saved_reg_list[saved_reg_count++] = 1;
1645
1646 if (saved_reg_count > 0) {
1647 FAIL_IF(push_inst(compiler, 0xe52d0000 | (saved_reg_count >= 3 ? 16 : 8)
1648 | (saved_reg_list[0] << 12) /* str rX, [sp, #-8/-16]! */));
1649 if (saved_reg_count >= 2) {
1650 SLJIT_ASSERT(saved_reg_list[1] < 8);
1651 FAIL_IF(push_inst(compiler, 0xe58d0004 | (saved_reg_list[1] << 12) /* str rX, [sp, #4] */));
1652 }
1653 if (saved_reg_count >= 3) {
1654 SLJIT_ASSERT(saved_reg_list[2] < 8);
1655 FAIL_IF(push_inst(compiler, 0xe58d0008 | (saved_reg_list[2] << 12) /* str rX, [sp, #8] */));
1656 }
1657 }
1658
1659 #if defined(__GNUC__)
1660 FAIL_IF(sljit_emit_ijump(compiler, SLJIT_FAST_CALL, SLJIT_IMM,
1661 ((op | 0x2) == SLJIT_DIV_UW ? SLJIT_FUNC_OFFSET(__aeabi_uidivmod) : SLJIT_FUNC_OFFSET(__aeabi_idivmod))));
1662 #else
1663 #error "Software divmod functions are needed"
1664 #endif
1665
1666 if (saved_reg_count > 0) {
1667 if (saved_reg_count >= 3) {
1668 SLJIT_ASSERT(saved_reg_list[2] < 8);
1669 FAIL_IF(push_inst(compiler, 0xe59d0008 | (saved_reg_list[2] << 12) /* ldr rX, [sp, #8] */));
1670 }
1671 if (saved_reg_count >= 2) {
1672 SLJIT_ASSERT(saved_reg_list[1] < 8);
1673 FAIL_IF(push_inst(compiler, 0xe59d0004 | (saved_reg_list[1] << 12) /* ldr rX, [sp, #4] */));
1674 }
1675 return push_inst(compiler, 0xe49d0000 | (saved_reg_count >= 3 ? 16 : 8)
1676 | (saved_reg_list[0] << 12) /* ldr rX, [sp], #8/16 */);
1677 }
1678 return SLJIT_SUCCESS;
1679 }
1680
1681 return SLJIT_SUCCESS;
1682 }
1683
sljit_emit_op1(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1684 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op1(struct sljit_compiler *compiler, sljit_s32 op,
1685 sljit_s32 dst, sljit_sw dstw,
1686 sljit_s32 src, sljit_sw srcw)
1687 {
1688 CHECK_ERROR();
1689 CHECK(check_sljit_emit_op1(compiler, op, dst, dstw, src, srcw));
1690 ADJUST_LOCAL_OFFSET(dst, dstw);
1691 ADJUST_LOCAL_OFFSET(src, srcw);
1692
1693 if (dst == SLJIT_UNUSED && !HAS_FLAGS(op)) {
1694 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
1695 if (op <= SLJIT_MOV_P && (src & SLJIT_MEM))
1696 return emit_op_mem(compiler, PRELOAD | LOAD_DATA, TMP_PC, src, srcw, TMP_REG1);
1697 #endif
1698 return SLJIT_SUCCESS;
1699 }
1700
1701 switch (GET_OPCODE(op)) {
1702 case SLJIT_MOV:
1703 case SLJIT_MOV_U32:
1704 case SLJIT_MOV_S32:
1705 case SLJIT_MOV_P:
1706 return emit_op(compiler, SLJIT_MOV, ALLOW_ANY_IMM, dst, dstw, TMP_REG1, 0, src, srcw);
1707
1708 case SLJIT_MOV_U8:
1709 return emit_op(compiler, SLJIT_MOV_U8, ALLOW_ANY_IMM | BYTE_SIZE, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_u8)srcw : srcw);
1710
1711 case SLJIT_MOV_S8:
1712 return emit_op(compiler, SLJIT_MOV_S8, ALLOW_ANY_IMM | SIGNED | BYTE_SIZE, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_s8)srcw : srcw);
1713
1714 case SLJIT_MOV_U16:
1715 return emit_op(compiler, SLJIT_MOV_U16, ALLOW_ANY_IMM | HALF_SIZE, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_u16)srcw : srcw);
1716
1717 case SLJIT_MOV_S16:
1718 return emit_op(compiler, SLJIT_MOV_S16, ALLOW_ANY_IMM | SIGNED | HALF_SIZE, dst, dstw, TMP_REG1, 0, src, (src & SLJIT_IMM) ? (sljit_s16)srcw : srcw);
1719
1720 case SLJIT_NOT:
1721 return emit_op(compiler, op, ALLOW_ANY_IMM, dst, dstw, TMP_REG1, 0, src, srcw);
1722
1723 case SLJIT_NEG:
1724 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
1725 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
1726 compiler->skip_checks = 1;
1727 #endif
1728 return sljit_emit_op2(compiler, SLJIT_SUB | GET_ALL_FLAGS(op), dst, dstw, SLJIT_IMM, 0, src, srcw);
1729
1730 case SLJIT_CLZ:
1731 return emit_op(compiler, op, 0, dst, dstw, TMP_REG1, 0, src, srcw);
1732 }
1733
1734 return SLJIT_SUCCESS;
1735 }
1736
sljit_emit_op2(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src1,sljit_sw src1w,sljit_s32 src2,sljit_sw src2w)1737 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op2(struct sljit_compiler *compiler, sljit_s32 op,
1738 sljit_s32 dst, sljit_sw dstw,
1739 sljit_s32 src1, sljit_sw src1w,
1740 sljit_s32 src2, sljit_sw src2w)
1741 {
1742 CHECK_ERROR();
1743 CHECK(check_sljit_emit_op2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1744 ADJUST_LOCAL_OFFSET(dst, dstw);
1745 ADJUST_LOCAL_OFFSET(src1, src1w);
1746 ADJUST_LOCAL_OFFSET(src2, src2w);
1747
1748 if (dst == SLJIT_UNUSED && !HAS_FLAGS(op))
1749 return SLJIT_SUCCESS;
1750
1751 switch (GET_OPCODE(op)) {
1752 case SLJIT_ADD:
1753 case SLJIT_ADDC:
1754 case SLJIT_SUB:
1755 case SLJIT_SUBC:
1756 case SLJIT_OR:
1757 case SLJIT_XOR:
1758 return emit_op(compiler, op, ALLOW_IMM, dst, dstw, src1, src1w, src2, src2w);
1759
1760 case SLJIT_MUL:
1761 return emit_op(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w);
1762
1763 case SLJIT_AND:
1764 return emit_op(compiler, op, ALLOW_ANY_IMM, dst, dstw, src1, src1w, src2, src2w);
1765
1766 case SLJIT_SHL:
1767 case SLJIT_LSHR:
1768 case SLJIT_ASHR:
1769 if (src2 & SLJIT_IMM) {
1770 compiler->shift_imm = src2w & 0x1f;
1771 return emit_op(compiler, op, 0, dst, dstw, TMP_REG1, 0, src1, src1w);
1772 }
1773 else {
1774 compiler->shift_imm = 0x20;
1775 return emit_op(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w);
1776 }
1777 }
1778
1779 return SLJIT_SUCCESS;
1780 }
1781
sljit_get_register_index(sljit_s32 reg)1782 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_register_index(sljit_s32 reg)
1783 {
1784 CHECK_REG_INDEX(check_sljit_get_register_index(reg));
1785 return reg_map[reg];
1786 }
1787
sljit_get_float_register_index(sljit_s32 reg)1788 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_float_register_index(sljit_s32 reg)
1789 {
1790 CHECK_REG_INDEX(check_sljit_get_float_register_index(reg));
1791 return (freg_map[reg] << 1);
1792 }
1793
sljit_emit_op_custom(struct sljit_compiler * compiler,void * instruction,sljit_s32 size)1794 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_custom(struct sljit_compiler *compiler,
1795 void *instruction, sljit_s32 size)
1796 {
1797 CHECK_ERROR();
1798 CHECK(check_sljit_emit_op_custom(compiler, instruction, size));
1799
1800 return push_inst(compiler, *(sljit_uw*)instruction);
1801 }
1802
1803 /* --------------------------------------------------------------------- */
1804 /* Floating point operators */
1805 /* --------------------------------------------------------------------- */
1806
1807
1808 #define FPU_LOAD (1 << 20)
1809 #define EMIT_FPU_DATA_TRANSFER(inst, add, base, freg, offs) \
1810 ((inst) | ((add) << 23) | (reg_map[base] << 16) | (freg_map[freg] << 12) | (offs))
1811 #define EMIT_FPU_OPERATION(opcode, mode, dst, src1, src2) \
1812 ((opcode) | (mode) | (freg_map[dst] << 12) | freg_map[src1] | (freg_map[src2] << 16))
1813
emit_fop_mem(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 reg,sljit_s32 arg,sljit_sw argw)1814 static sljit_s32 emit_fop_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg, sljit_s32 arg, sljit_sw argw)
1815 {
1816 sljit_uw imm;
1817 sljit_sw inst = VSTR_F32 | (flags & (SLJIT_F32_OP | FPU_LOAD));
1818
1819 SLJIT_ASSERT(arg & SLJIT_MEM);
1820 arg &= ~SLJIT_MEM;
1821
1822 if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
1823 FAIL_IF(push_inst(compiler, ADD | RD(TMP_REG2) | RN(arg & REG_MASK) | RM(OFFS_REG(arg)) | ((argw & 0x3) << 7)));
1824 arg = TMP_REG2;
1825 argw = 0;
1826 }
1827
1828 /* Fast loads and stores. */
1829 if (arg) {
1830 if (!(argw & ~0x3fc))
1831 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, arg & REG_MASK, reg, argw >> 2));
1832 if (!(-argw & ~0x3fc))
1833 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, arg & REG_MASK, reg, (-argw) >> 2));
1834
1835 imm = get_imm(argw & ~0x3fc);
1836 if (imm) {
1837 FAIL_IF(push_inst(compiler, ADD | RD(TMP_REG2) | RN(arg & REG_MASK) | imm));
1838 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG2, reg, (argw & 0x3fc) >> 2));
1839 }
1840 imm = get_imm(-argw & ~0x3fc);
1841 if (imm) {
1842 argw = -argw;
1843 FAIL_IF(push_inst(compiler, SUB | RD(TMP_REG2) | RN(arg & REG_MASK) | imm));
1844 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 0, TMP_REG2, reg, (argw & 0x3fc) >> 2));
1845 }
1846 }
1847
1848 if (arg) {
1849 FAIL_IF(load_immediate(compiler, TMP_REG2, argw));
1850 FAIL_IF(push_inst(compiler, ADD | RD(TMP_REG2) | RN(arg & REG_MASK) | RM(TMP_REG2)));
1851 }
1852 else
1853 FAIL_IF(load_immediate(compiler, TMP_REG2, argw));
1854
1855 return push_inst(compiler, EMIT_FPU_DATA_TRANSFER(inst, 1, TMP_REG2, reg, 0));
1856 }
1857
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)1858 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_sw_from_f64(struct sljit_compiler *compiler, sljit_s32 op,
1859 sljit_s32 dst, sljit_sw dstw,
1860 sljit_s32 src, sljit_sw srcw)
1861 {
1862 op ^= SLJIT_F32_OP;
1863
1864 if (src & SLJIT_MEM) {
1865 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src, srcw));
1866 src = TMP_FREG1;
1867 }
1868
1869 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_S32_F32, op & SLJIT_F32_OP, TMP_FREG1, src, 0)));
1870
1871 if (FAST_IS_REG(dst))
1872 return push_inst(compiler, VMOV | (1 << 20) | RD(dst) | (freg_map[TMP_FREG1] << 16));
1873
1874 /* Store the integer value from a VFP register. */
1875 return emit_fop_mem(compiler, 0, TMP_FREG1, dst, dstw);
1876 }
1877
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)1878 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_f64_from_sw(struct sljit_compiler *compiler, sljit_s32 op,
1879 sljit_s32 dst, sljit_sw dstw,
1880 sljit_s32 src, sljit_sw srcw)
1881 {
1882 sljit_s32 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1883
1884 op ^= SLJIT_F32_OP;
1885
1886 if (FAST_IS_REG(src))
1887 FAIL_IF(push_inst(compiler, VMOV | RD(src) | (freg_map[TMP_FREG1] << 16)));
1888 else if (src & SLJIT_MEM) {
1889 /* Load the integer value into a VFP register. */
1890 FAIL_IF(emit_fop_mem(compiler, FPU_LOAD, TMP_FREG1, src, srcw));
1891 }
1892 else {
1893 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
1894 FAIL_IF(push_inst(compiler, VMOV | RD(TMP_REG1) | (freg_map[TMP_FREG1] << 16)));
1895 }
1896
1897 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_F32_S32, op & SLJIT_F32_OP, dst_r, TMP_FREG1, 0)));
1898
1899 if (dst & SLJIT_MEM)
1900 return emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw);
1901 return SLJIT_SUCCESS;
1902 }
1903
sljit_emit_fop1_cmp(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src1,sljit_sw src1w,sljit_s32 src2,sljit_sw src2w)1904 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_cmp(struct sljit_compiler *compiler, sljit_s32 op,
1905 sljit_s32 src1, sljit_sw src1w,
1906 sljit_s32 src2, sljit_sw src2w)
1907 {
1908 op ^= SLJIT_F32_OP;
1909
1910 if (src1 & SLJIT_MEM) {
1911 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w));
1912 src1 = TMP_FREG1;
1913 }
1914
1915 if (src2 & SLJIT_MEM) {
1916 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w));
1917 src2 = TMP_FREG2;
1918 }
1919
1920 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCMP_F32, op & SLJIT_F32_OP, src1, src2, 0)));
1921 return push_inst(compiler, VMRS);
1922 }
1923
sljit_emit_fop1(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1924 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop1(struct sljit_compiler *compiler, sljit_s32 op,
1925 sljit_s32 dst, sljit_sw dstw,
1926 sljit_s32 src, sljit_sw srcw)
1927 {
1928 sljit_s32 dst_r;
1929
1930 CHECK_ERROR();
1931
1932 SLJIT_COMPILE_ASSERT((SLJIT_F32_OP == 0x100), float_transfer_bit_error);
1933 SELECT_FOP1_OPERATION_WITH_CHECKS(compiler, op, dst, dstw, src, srcw);
1934
1935 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1936
1937 if (GET_OPCODE(op) != SLJIT_CONV_F64_FROM_F32)
1938 op ^= SLJIT_F32_OP;
1939
1940 if (src & SLJIT_MEM) {
1941 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, dst_r, src, srcw));
1942 src = dst_r;
1943 }
1944
1945 switch (GET_OPCODE(op)) {
1946 case SLJIT_MOV_F64:
1947 if (src != dst_r) {
1948 if (dst_r != TMP_FREG1)
1949 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMOV_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1950 else
1951 dst_r = src;
1952 }
1953 break;
1954 case SLJIT_NEG_F64:
1955 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VNEG_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1956 break;
1957 case SLJIT_ABS_F64:
1958 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VABS_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1959 break;
1960 case SLJIT_CONV_F64_FROM_F32:
1961 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VCVT_F64_F32, op & SLJIT_F32_OP, dst_r, src, 0)));
1962 op ^= SLJIT_F32_OP;
1963 break;
1964 }
1965
1966 if (dst & SLJIT_MEM)
1967 return emit_fop_mem(compiler, (op & SLJIT_F32_OP), dst_r, dst, dstw);
1968 return SLJIT_SUCCESS;
1969 }
1970
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)1971 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop2(struct sljit_compiler *compiler, sljit_s32 op,
1972 sljit_s32 dst, sljit_sw dstw,
1973 sljit_s32 src1, sljit_sw src1w,
1974 sljit_s32 src2, sljit_sw src2w)
1975 {
1976 sljit_s32 dst_r;
1977
1978 CHECK_ERROR();
1979 CHECK(check_sljit_emit_fop2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1980 ADJUST_LOCAL_OFFSET(dst, dstw);
1981 ADJUST_LOCAL_OFFSET(src1, src1w);
1982 ADJUST_LOCAL_OFFSET(src2, src2w);
1983
1984 op ^= SLJIT_F32_OP;
1985
1986 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1987
1988 if (src2 & SLJIT_MEM) {
1989 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w));
1990 src2 = TMP_FREG2;
1991 }
1992
1993 if (src1 & SLJIT_MEM) {
1994 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w));
1995 src1 = TMP_FREG1;
1996 }
1997
1998 switch (GET_OPCODE(op)) {
1999 case SLJIT_ADD_F64:
2000 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VADD_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2001 break;
2002
2003 case SLJIT_SUB_F64:
2004 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VSUB_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2005 break;
2006
2007 case SLJIT_MUL_F64:
2008 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMUL_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2009 break;
2010
2011 case SLJIT_DIV_F64:
2012 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VDIV_F32, op & SLJIT_F32_OP, dst_r, src2, src1)));
2013 break;
2014 }
2015
2016 if (dst_r == TMP_FREG1)
2017 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw));
2018
2019 return SLJIT_SUCCESS;
2020 }
2021
2022 #undef FPU_LOAD
2023 #undef EMIT_FPU_DATA_TRANSFER
2024
2025 /* --------------------------------------------------------------------- */
2026 /* Other instructions */
2027 /* --------------------------------------------------------------------- */
2028
sljit_emit_fast_enter(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw)2029 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
2030 {
2031 CHECK_ERROR();
2032 CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
2033 ADJUST_LOCAL_OFFSET(dst, dstw);
2034
2035 SLJIT_ASSERT(reg_map[TMP_REG2] == 14);
2036
2037 if (FAST_IS_REG(dst))
2038 return push_inst(compiler, MOV | RD(dst) | RM(TMP_REG2));
2039
2040 /* Memory. */
2041 return emit_op_mem(compiler, WORD_SIZE, TMP_REG2, dst, dstw, TMP_REG1);
2042 }
2043
sljit_emit_fast_return(struct sljit_compiler * compiler,sljit_s32 src,sljit_sw srcw)2044 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw)
2045 {
2046 CHECK_ERROR();
2047 CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
2048 ADJUST_LOCAL_OFFSET(src, srcw);
2049
2050 SLJIT_ASSERT(reg_map[TMP_REG2] == 14);
2051
2052 if (FAST_IS_REG(src))
2053 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG2) | RM(src)));
2054 else
2055 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG2, src, srcw, TMP_REG1));
2056
2057 return push_inst(compiler, BX | RM(TMP_REG2));
2058 }
2059
2060 /* --------------------------------------------------------------------- */
2061 /* Conditional instructions */
2062 /* --------------------------------------------------------------------- */
2063
get_cc(sljit_s32 type)2064 static sljit_uw get_cc(sljit_s32 type)
2065 {
2066 switch (type) {
2067 case SLJIT_EQUAL:
2068 case SLJIT_MUL_NOT_OVERFLOW:
2069 case SLJIT_EQUAL_F64:
2070 return 0x00000000;
2071
2072 case SLJIT_NOT_EQUAL:
2073 case SLJIT_MUL_OVERFLOW:
2074 case SLJIT_NOT_EQUAL_F64:
2075 return 0x10000000;
2076
2077 case SLJIT_LESS:
2078 case SLJIT_LESS_F64:
2079 return 0x30000000;
2080
2081 case SLJIT_GREATER_EQUAL:
2082 case SLJIT_GREATER_EQUAL_F64:
2083 return 0x20000000;
2084
2085 case SLJIT_GREATER:
2086 case SLJIT_GREATER_F64:
2087 return 0x80000000;
2088
2089 case SLJIT_LESS_EQUAL:
2090 case SLJIT_LESS_EQUAL_F64:
2091 return 0x90000000;
2092
2093 case SLJIT_SIG_LESS:
2094 return 0xb0000000;
2095
2096 case SLJIT_SIG_GREATER_EQUAL:
2097 return 0xa0000000;
2098
2099 case SLJIT_SIG_GREATER:
2100 return 0xc0000000;
2101
2102 case SLJIT_SIG_LESS_EQUAL:
2103 return 0xd0000000;
2104
2105 case SLJIT_OVERFLOW:
2106 case SLJIT_UNORDERED_F64:
2107 return 0x60000000;
2108
2109 case SLJIT_NOT_OVERFLOW:
2110 case SLJIT_ORDERED_F64:
2111 return 0x70000000;
2112
2113 default:
2114 SLJIT_ASSERT(type >= SLJIT_JUMP && type <= SLJIT_CALL_CDECL);
2115 return 0xe0000000;
2116 }
2117 }
2118
sljit_emit_label(struct sljit_compiler * compiler)2119 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler)
2120 {
2121 struct sljit_label *label;
2122
2123 CHECK_ERROR_PTR();
2124 CHECK_PTR(check_sljit_emit_label(compiler));
2125
2126 if (compiler->last_label && compiler->last_label->size == compiler->size)
2127 return compiler->last_label;
2128
2129 label = (struct sljit_label*)ensure_abuf(compiler, sizeof(struct sljit_label));
2130 PTR_FAIL_IF(!label);
2131 set_label(label, compiler);
2132 return label;
2133 }
2134
sljit_emit_jump(struct sljit_compiler * compiler,sljit_s32 type)2135 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, sljit_s32 type)
2136 {
2137 struct sljit_jump *jump;
2138
2139 CHECK_ERROR_PTR();
2140 CHECK_PTR(check_sljit_emit_jump(compiler, type));
2141
2142 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
2143 PTR_FAIL_IF(!jump);
2144 set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
2145 type &= 0xff;
2146
2147 SLJIT_ASSERT(reg_map[TMP_REG1] != 14);
2148
2149 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2150 if (type >= SLJIT_FAST_CALL)
2151 PTR_FAIL_IF(prepare_blx(compiler));
2152 PTR_FAIL_IF(push_inst_with_unique_literal(compiler, ((EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1,
2153 type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, TMP_PC, 0)) & ~COND_MASK) | get_cc(type), 0));
2154
2155 if (jump->flags & SLJIT_REWRITABLE_JUMP) {
2156 jump->addr = compiler->size;
2157 compiler->patches++;
2158 }
2159
2160 if (type >= SLJIT_FAST_CALL) {
2161 jump->flags |= IS_BL;
2162 PTR_FAIL_IF(emit_blx(compiler));
2163 }
2164
2165 if (!(jump->flags & SLJIT_REWRITABLE_JUMP))
2166 jump->addr = compiler->size;
2167 #else
2168 if (type >= SLJIT_FAST_CALL)
2169 jump->flags |= IS_BL;
2170 PTR_FAIL_IF(emit_imm(compiler, TMP_REG1, 0));
2171 PTR_FAIL_IF(push_inst(compiler, (((type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1)) & ~COND_MASK) | get_cc(type)));
2172 jump->addr = compiler->size;
2173 #endif
2174 return jump;
2175 }
2176
2177 #ifdef __SOFTFP__
2178
softfloat_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types,sljit_s32 * src)2179 static sljit_s32 softfloat_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src)
2180 {
2181 sljit_s32 stack_offset = 0;
2182 sljit_s32 arg_count = 0;
2183 sljit_s32 word_arg_offset = 0;
2184 sljit_s32 float_arg_count = 0;
2185 sljit_s32 types = 0;
2186 sljit_s32 src_offset = 4 * sizeof(sljit_sw);
2187 sljit_u8 offsets[4];
2188
2189 if (src && FAST_IS_REG(*src))
2190 src_offset = reg_map[*src] * sizeof(sljit_sw);
2191
2192 arg_types >>= SLJIT_DEF_SHIFT;
2193
2194 while (arg_types) {
2195 types = (types << SLJIT_DEF_SHIFT) | (arg_types & SLJIT_DEF_MASK);
2196
2197 switch (arg_types & SLJIT_DEF_MASK) {
2198 case SLJIT_ARG_TYPE_F32:
2199 offsets[arg_count] = (sljit_u8)stack_offset;
2200 stack_offset += sizeof(sljit_f32);
2201 arg_count++;
2202 float_arg_count++;
2203 break;
2204 case SLJIT_ARG_TYPE_F64:
2205 if (stack_offset & 0x7)
2206 stack_offset += sizeof(sljit_sw);
2207 offsets[arg_count] = (sljit_u8)stack_offset;
2208 stack_offset += sizeof(sljit_f64);
2209 arg_count++;
2210 float_arg_count++;
2211 break;
2212 default:
2213 offsets[arg_count] = (sljit_u8)stack_offset;
2214 stack_offset += sizeof(sljit_sw);
2215 arg_count++;
2216 word_arg_offset += sizeof(sljit_sw);
2217 break;
2218 }
2219
2220 arg_types >>= SLJIT_DEF_SHIFT;
2221 }
2222
2223 if (stack_offset > 16)
2224 FAIL_IF(push_inst(compiler, SUB | RD(SLJIT_SP) | RN(SLJIT_SP) | SRC2_IMM | (((stack_offset - 16) + 0x7) & ~0x7)));
2225
2226 /* Process arguments in reversed direction. */
2227 while (types) {
2228 switch (types & SLJIT_DEF_MASK) {
2229 case SLJIT_ARG_TYPE_F32:
2230 arg_count--;
2231 float_arg_count--;
2232 stack_offset = offsets[arg_count];
2233
2234 if (stack_offset < 16) {
2235 if (src_offset == stack_offset) {
2236 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG1) | (src_offset >> 2)));
2237 *src = TMP_REG1;
2238 }
2239 FAIL_IF(push_inst(compiler, VMOV | 0x100000 | (float_arg_count << 16) | (stack_offset << 10)));
2240 } else
2241 FAIL_IF(push_inst(compiler, VSTR_F32 | 0x800000 | RN(SLJIT_SP) | (float_arg_count << 12) | ((stack_offset - 16) >> 2)));
2242 break;
2243 case SLJIT_ARG_TYPE_F64:
2244 arg_count--;
2245 float_arg_count--;
2246 stack_offset = offsets[arg_count];
2247
2248 SLJIT_ASSERT((stack_offset & 0x7) == 0);
2249
2250 if (stack_offset < 16) {
2251 if (src_offset == stack_offset || src_offset == stack_offset + sizeof(sljit_sw)) {
2252 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG1) | (src_offset >> 2)));
2253 *src = TMP_REG1;
2254 }
2255 FAIL_IF(push_inst(compiler, VMOV2 | 0x100000 | (stack_offset << 10) | ((stack_offset + sizeof(sljit_sw)) << 14) | float_arg_count));
2256 } else
2257 FAIL_IF(push_inst(compiler, VSTR_F32 | 0x800100 | RN(SLJIT_SP) | (float_arg_count << 12) | ((stack_offset - 16) >> 2)));
2258 break;
2259 default:
2260 arg_count--;
2261 word_arg_offset -= sizeof(sljit_sw);
2262 stack_offset = offsets[arg_count];
2263
2264 SLJIT_ASSERT(stack_offset >= word_arg_offset);
2265
2266 if (stack_offset != word_arg_offset) {
2267 if (stack_offset < 16) {
2268 if (src_offset == stack_offset) {
2269 FAIL_IF(push_inst(compiler, MOV | RD(TMP_REG1) | (src_offset >> 2)));
2270 *src = TMP_REG1;
2271 }
2272 else if (src_offset == word_arg_offset) {
2273 *src = 1 + (stack_offset >> 2);
2274 src_offset = stack_offset;
2275 }
2276 FAIL_IF(push_inst(compiler, MOV | (stack_offset << 10) | (word_arg_offset >> 2)));
2277 } else
2278 FAIL_IF(push_inst(compiler, data_transfer_insts[WORD_SIZE] | 0x800000 | RN(SLJIT_SP) | (word_arg_offset << 10) | (stack_offset - 16)));
2279 }
2280 break;
2281 }
2282
2283 types >>= SLJIT_DEF_SHIFT;
2284 }
2285
2286 return SLJIT_SUCCESS;
2287 }
2288
softfloat_post_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types)2289 static sljit_s32 softfloat_post_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
2290 {
2291 sljit_s32 stack_size = 0;
2292
2293 if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32)
2294 FAIL_IF(push_inst(compiler, VMOV | (0 << 16) | (0 << 12)));
2295 if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F64)
2296 FAIL_IF(push_inst(compiler, VMOV2 | (1 << 16) | (0 << 12) | 0));
2297
2298 arg_types >>= SLJIT_DEF_SHIFT;
2299
2300 while (arg_types) {
2301 switch (arg_types & SLJIT_DEF_MASK) {
2302 case SLJIT_ARG_TYPE_F32:
2303 stack_size += sizeof(sljit_f32);
2304 break;
2305 case SLJIT_ARG_TYPE_F64:
2306 if (stack_size & 0x7)
2307 stack_size += sizeof(sljit_sw);
2308 stack_size += sizeof(sljit_f64);
2309 break;
2310 default:
2311 stack_size += sizeof(sljit_sw);
2312 break;
2313 }
2314
2315 arg_types >>= SLJIT_DEF_SHIFT;
2316 }
2317
2318 if (stack_size <= 16)
2319 return SLJIT_SUCCESS;
2320
2321 return push_inst(compiler, ADD | RD(SLJIT_SP) | RN(SLJIT_SP) | SRC2_IMM | (((stack_size - 16) + 0x7) & ~0x7));
2322 }
2323
2324 #else /* !__SOFTFP__ */
2325
hardfloat_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types)2326 static sljit_s32 hardfloat_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
2327 {
2328 sljit_u32 remap = 0;
2329 sljit_u32 offset = 0;
2330 sljit_u32 new_offset, mask;
2331
2332 /* Remove return value. */
2333 arg_types >>= SLJIT_DEF_SHIFT;
2334
2335 while (arg_types) {
2336 if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32) {
2337 new_offset = 0;
2338 mask = 1;
2339
2340 while (remap & mask) {
2341 new_offset++;
2342 mask <<= 1;
2343 }
2344 remap |= mask;
2345
2346 if (offset != new_offset)
2347 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMOV_F32,
2348 0, (new_offset >> 1) + 1, (offset >> 1) + 1, 0) | ((new_offset & 0x1) ? 0x400000 : 0)));
2349
2350 offset += 2;
2351 }
2352 else if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F64) {
2353 new_offset = 0;
2354 mask = 3;
2355
2356 while (remap & mask) {
2357 new_offset += 2;
2358 mask <<= 2;
2359 }
2360 remap |= mask;
2361
2362 if (offset != new_offset)
2363 FAIL_IF(push_inst(compiler, EMIT_FPU_OPERATION(VMOV_F32, SLJIT_F32_OP, (new_offset >> 1) + 1, (offset >> 1) + 1, 0)));
2364
2365 offset += 2;
2366 }
2367 arg_types >>= SLJIT_DEF_SHIFT;
2368 }
2369
2370 return SLJIT_SUCCESS;
2371 }
2372
2373 #endif /* __SOFTFP__ */
2374
2375 #undef EMIT_FPU_OPERATION
2376
sljit_emit_call(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types)2377 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
2378 sljit_s32 arg_types)
2379 {
2380 #ifdef __SOFTFP__
2381 struct sljit_jump *jump;
2382 #endif
2383
2384 CHECK_ERROR_PTR();
2385 CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
2386
2387 #ifdef __SOFTFP__
2388 PTR_FAIL_IF(softfloat_call_with_args(compiler, arg_types, NULL));
2389
2390 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2391 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2392 compiler->skip_checks = 1;
2393 #endif
2394
2395 jump = sljit_emit_jump(compiler, type);
2396 PTR_FAIL_IF(jump == NULL);
2397
2398 PTR_FAIL_IF(softfloat_post_call_with_args(compiler, arg_types));
2399 return jump;
2400 #else /* !__SOFTFP__ */
2401 PTR_FAIL_IF(hardfloat_call_with_args(compiler, arg_types));
2402
2403 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2404 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2405 compiler->skip_checks = 1;
2406 #endif
2407
2408 return sljit_emit_jump(compiler, type);
2409 #endif /* __SOFTFP__ */
2410 }
2411
sljit_emit_ijump(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 src,sljit_sw srcw)2412 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_ijump(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 src, sljit_sw srcw)
2413 {
2414 struct sljit_jump *jump;
2415
2416 CHECK_ERROR();
2417 CHECK(check_sljit_emit_ijump(compiler, type, src, srcw));
2418 ADJUST_LOCAL_OFFSET(src, srcw);
2419
2420 SLJIT_ASSERT(reg_map[TMP_REG1] != 14);
2421
2422 if (!(src & SLJIT_IMM)) {
2423 if (FAST_IS_REG(src)) {
2424 SLJIT_ASSERT(reg_map[src] != 14);
2425 return push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(src));
2426 }
2427
2428 SLJIT_ASSERT(src & SLJIT_MEM);
2429 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG1, src, srcw, TMP_REG1));
2430 return push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1));
2431 }
2432
2433 /* These jumps are converted to jump/call instructions when possible. */
2434 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
2435 FAIL_IF(!jump);
2436 set_jump(jump, compiler, JUMP_ADDR | ((type >= SLJIT_FAST_CALL) ? IS_BL : 0));
2437 jump->u.target = srcw;
2438
2439 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2440 if (type >= SLJIT_FAST_CALL)
2441 FAIL_IF(prepare_blx(compiler));
2442 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));
2443 if (type >= SLJIT_FAST_CALL)
2444 FAIL_IF(emit_blx(compiler));
2445 #else
2446 FAIL_IF(emit_imm(compiler, TMP_REG1, 0));
2447 FAIL_IF(push_inst(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RM(TMP_REG1)));
2448 #endif
2449 jump->addr = compiler->size;
2450 return SLJIT_SUCCESS;
2451 }
2452
sljit_emit_icall(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types,sljit_s32 src,sljit_sw srcw)2453 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
2454 sljit_s32 arg_types,
2455 sljit_s32 src, sljit_sw srcw)
2456 {
2457 CHECK_ERROR();
2458 CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
2459
2460 #ifdef __SOFTFP__
2461 if (src & SLJIT_MEM) {
2462 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG1, src, srcw, TMP_REG1));
2463 src = TMP_REG1;
2464 }
2465
2466 FAIL_IF(softfloat_call_with_args(compiler, arg_types, &src));
2467
2468 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2469 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2470 compiler->skip_checks = 1;
2471 #endif
2472
2473 FAIL_IF(sljit_emit_ijump(compiler, type, src, srcw));
2474
2475 return softfloat_post_call_with_args(compiler, arg_types);
2476 #else /* !__SOFTFP__ */
2477 FAIL_IF(hardfloat_call_with_args(compiler, arg_types));
2478
2479 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2480 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2481 compiler->skip_checks = 1;
2482 #endif
2483
2484 return sljit_emit_ijump(compiler, type, src, srcw);
2485 #endif /* __SOFTFP__ */
2486 }
2487
sljit_emit_op_flags(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 type)2488 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_flags(struct sljit_compiler *compiler, sljit_s32 op,
2489 sljit_s32 dst, sljit_sw dstw,
2490 sljit_s32 type)
2491 {
2492 sljit_s32 dst_reg, flags = GET_ALL_FLAGS(op);
2493 sljit_uw cc, ins;
2494
2495 CHECK_ERROR();
2496 CHECK(check_sljit_emit_op_flags(compiler, op, dst, dstw, type));
2497 ADJUST_LOCAL_OFFSET(dst, dstw);
2498
2499 op = GET_OPCODE(op);
2500 cc = get_cc(type & 0xff);
2501 dst_reg = FAST_IS_REG(dst) ? dst : TMP_REG1;
2502
2503 if (op < SLJIT_ADD) {
2504 FAIL_IF(push_inst(compiler, MOV | RD(dst_reg) | SRC2_IMM | 0));
2505 FAIL_IF(push_inst(compiler, ((MOV | RD(dst_reg) | SRC2_IMM | 1) & ~COND_MASK) | cc));
2506 if (dst & SLJIT_MEM)
2507 return emit_op_mem(compiler, WORD_SIZE, TMP_REG1, dst, dstw, TMP_REG2);
2508 return SLJIT_SUCCESS;
2509 }
2510
2511 ins = (op == SLJIT_AND ? AND : (op == SLJIT_OR ? ORR : EOR));
2512
2513 if (dst & SLJIT_MEM)
2514 FAIL_IF(emit_op_mem(compiler, WORD_SIZE | LOAD_DATA, TMP_REG1, dst, dstw, TMP_REG2));
2515
2516 FAIL_IF(push_inst(compiler, ((ins | RD(dst_reg) | RN(dst_reg) | SRC2_IMM | 1) & ~COND_MASK) | cc));
2517
2518 if (op == SLJIT_AND)
2519 FAIL_IF(push_inst(compiler, ((ins | RD(dst_reg) | RN(dst_reg) | SRC2_IMM | 0) & ~COND_MASK) | (cc ^ 0x10000000)));
2520
2521 if (dst & SLJIT_MEM)
2522 FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, dst, dstw, TMP_REG2));
2523
2524 if (flags & SLJIT_SET_Z)
2525 return push_inst(compiler, MOV | SET_FLAGS | RD(TMP_REG2) | RM(dst_reg));
2526 return SLJIT_SUCCESS;
2527 }
2528
sljit_emit_cmov(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 dst_reg,sljit_s32 src,sljit_sw srcw)2529 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_cmov(struct sljit_compiler *compiler, sljit_s32 type,
2530 sljit_s32 dst_reg,
2531 sljit_s32 src, sljit_sw srcw)
2532 {
2533 sljit_uw cc, tmp;
2534
2535 CHECK_ERROR();
2536 CHECK(check_sljit_emit_cmov(compiler, type, dst_reg, src, srcw));
2537
2538 dst_reg &= ~SLJIT_I32_OP;
2539
2540 cc = get_cc(type & 0xff);
2541
2542 if (SLJIT_UNLIKELY(src & SLJIT_IMM)) {
2543 tmp = get_imm(srcw);
2544 if (tmp)
2545 return push_inst(compiler, ((MOV | RD(dst_reg) | tmp) & ~COND_MASK) | cc);
2546
2547 tmp = get_imm(~srcw);
2548 if (tmp)
2549 return push_inst(compiler, ((MVN | RD(dst_reg) | tmp) & ~COND_MASK) | cc);
2550
2551 #if (defined SLJIT_CONFIG_ARM_V7 && SLJIT_CONFIG_ARM_V7)
2552 tmp = (sljit_uw) srcw;
2553 FAIL_IF(push_inst(compiler, (MOVW & ~COND_MASK) | cc | RD(dst_reg) | ((tmp << 4) & 0xf0000) | (tmp & 0xfff)));
2554 if (tmp <= 0xffff)
2555 return SLJIT_SUCCESS;
2556 return push_inst(compiler, (MOVT & ~COND_MASK) | cc | RD(dst_reg) | ((tmp >> 12) & 0xf0000) | ((tmp >> 16) & 0xfff));
2557 #else
2558 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
2559 src = TMP_REG1;
2560 #endif
2561 }
2562
2563 return push_inst(compiler, ((MOV | RD(dst_reg) | RM(src)) & ~COND_MASK) | cc);
2564 }
2565
sljit_emit_mem(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 reg,sljit_s32 mem,sljit_sw memw)2566 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_mem(struct sljit_compiler *compiler, sljit_s32 type,
2567 sljit_s32 reg,
2568 sljit_s32 mem, sljit_sw memw)
2569 {
2570 sljit_s32 flags;
2571 sljit_uw is_type1_transfer, inst;
2572
2573 CHECK_ERROR();
2574 CHECK(check_sljit_emit_mem(compiler, type, reg, mem, memw));
2575
2576 is_type1_transfer = 1;
2577
2578 switch (type & 0xff) {
2579 case SLJIT_MOV:
2580 case SLJIT_MOV_U32:
2581 case SLJIT_MOV_S32:
2582 case SLJIT_MOV_P:
2583 flags = WORD_SIZE;
2584 break;
2585 case SLJIT_MOV_U8:
2586 flags = BYTE_SIZE;
2587 break;
2588 case SLJIT_MOV_S8:
2589 if (!(type & SLJIT_MEM_STORE))
2590 is_type1_transfer = 0;
2591 flags = BYTE_SIZE | SIGNED;
2592 break;
2593 case SLJIT_MOV_U16:
2594 is_type1_transfer = 0;
2595 flags = HALF_SIZE;
2596 break;
2597 case SLJIT_MOV_S16:
2598 is_type1_transfer = 0;
2599 flags = HALF_SIZE | SIGNED;
2600 break;
2601 default:
2602 SLJIT_UNREACHABLE();
2603 flags = WORD_SIZE;
2604 break;
2605 }
2606
2607 if (!(type & SLJIT_MEM_STORE))
2608 flags |= LOAD_DATA;
2609
2610 SLJIT_ASSERT(is_type1_transfer == !!IS_TYPE1_TRANSFER(flags));
2611
2612 if (SLJIT_UNLIKELY(mem & OFFS_REG_MASK)) {
2613 if (!is_type1_transfer && memw != 0)
2614 return SLJIT_ERR_UNSUPPORTED;
2615 }
2616 else {
2617 if (is_type1_transfer) {
2618 if (memw > 4095 && memw < -4095)
2619 return SLJIT_ERR_UNSUPPORTED;
2620 }
2621 else {
2622 if (memw > 255 && memw < -255)
2623 return SLJIT_ERR_UNSUPPORTED;
2624 }
2625 }
2626
2627 if (type & SLJIT_MEM_SUPP)
2628 return SLJIT_SUCCESS;
2629
2630 if (SLJIT_UNLIKELY(mem & OFFS_REG_MASK)) {
2631 memw &= 0x3;
2632
2633 inst = EMIT_DATA_TRANSFER(flags, 1, reg, mem & REG_MASK, RM(OFFS_REG(mem)) | (memw << 7));
2634
2635 if (is_type1_transfer)
2636 inst |= (1 << 25);
2637
2638 if (type & SLJIT_MEM_PRE)
2639 inst |= (1 << 21);
2640 else
2641 inst ^= (1 << 24);
2642
2643 return push_inst(compiler, inst);
2644 }
2645
2646 inst = EMIT_DATA_TRANSFER(flags, 0, reg, mem & REG_MASK, 0);
2647
2648 if (type & SLJIT_MEM_PRE)
2649 inst |= (1 << 21);
2650 else
2651 inst ^= (1 << 24);
2652
2653 if (is_type1_transfer) {
2654 if (memw >= 0)
2655 inst |= (1 << 23);
2656 else
2657 memw = -memw;
2658
2659 return push_inst(compiler, inst | memw);
2660 }
2661
2662 if (memw >= 0)
2663 inst |= (1 << 23);
2664 else
2665 memw = -memw;
2666
2667 return push_inst(compiler, inst | TYPE2_TRANSFER_IMM(memw));
2668 }
2669
sljit_emit_const(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw,sljit_sw init_value)2670 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw, sljit_sw init_value)
2671 {
2672 struct sljit_const *const_;
2673 sljit_s32 dst_r;
2674
2675 CHECK_ERROR_PTR();
2676 CHECK_PTR(check_sljit_emit_const(compiler, dst, dstw, init_value));
2677 ADJUST_LOCAL_OFFSET(dst, dstw);
2678
2679 dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG2;
2680
2681 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2682 PTR_FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1, dst_r, TMP_PC, 0), init_value));
2683 compiler->patches++;
2684 #else
2685 PTR_FAIL_IF(emit_imm(compiler, dst_r, init_value));
2686 #endif
2687
2688 const_ = (struct sljit_const*)ensure_abuf(compiler, sizeof(struct sljit_const));
2689 PTR_FAIL_IF(!const_);
2690 set_const(const_, compiler);
2691
2692 if (dst & SLJIT_MEM)
2693 PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG2, dst, dstw, TMP_REG1));
2694 return const_;
2695 }
2696
sljit_emit_put_label(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw)2697 SLJIT_API_FUNC_ATTRIBUTE struct sljit_put_label* sljit_emit_put_label(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
2698 {
2699 struct sljit_put_label *put_label;
2700 sljit_s32 dst_r;
2701
2702 CHECK_ERROR_PTR();
2703 CHECK_PTR(check_sljit_emit_put_label(compiler, dst, dstw));
2704 ADJUST_LOCAL_OFFSET(dst, dstw);
2705
2706 dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG2;
2707
2708 #if (defined SLJIT_CONFIG_ARM_V5 && SLJIT_CONFIG_ARM_V5)
2709 PTR_FAIL_IF(push_inst_with_unique_literal(compiler, EMIT_DATA_TRANSFER(WORD_SIZE | LOAD_DATA, 1, dst_r, TMP_PC, 0), 0));
2710 compiler->patches++;
2711 #else
2712 PTR_FAIL_IF(emit_imm(compiler, dst_r, 0));
2713 #endif
2714
2715 put_label = (struct sljit_put_label*)ensure_abuf(compiler, sizeof(struct sljit_put_label));
2716 PTR_FAIL_IF(!put_label);
2717 set_put_label(put_label, compiler, 0);
2718
2719 if (dst & SLJIT_MEM)
2720 PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG2, dst, dstw, TMP_REG1));
2721 return put_label;
2722 }
2723
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_target,sljit_sw executable_offset)2724 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
2725 {
2726 inline_set_jump_addr(addr, executable_offset, new_target, 1);
2727 }
2728
sljit_set_const(sljit_uw addr,sljit_sw new_constant,sljit_sw executable_offset)2729 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
2730 {
2731 inline_set_const(addr, executable_offset, new_constant, 1);
2732 }
2733