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
sljit_get_platform_name(void)27 SLJIT_API_FUNC_ATTRIBUTE const char* sljit_get_platform_name(void)
28 {
29 return "ARM-64" SLJIT_CPUINFO;
30 }
31
32 /* Length of an instruction word */
33 typedef sljit_u32 sljit_ins;
34
35 #define TMP_ZERO (0)
36
37 #define TMP_REG1 (SLJIT_NUMBER_OF_REGISTERS + 2)
38 #define TMP_REG2 (SLJIT_NUMBER_OF_REGISTERS + 3)
39 #define TMP_LR (SLJIT_NUMBER_OF_REGISTERS + 4)
40 #define TMP_FP (SLJIT_NUMBER_OF_REGISTERS + 5)
41
42 #define TMP_FREG1 (SLJIT_NUMBER_OF_FLOAT_REGISTERS + 1)
43 #define TMP_FREG2 (SLJIT_NUMBER_OF_FLOAT_REGISTERS + 2)
44
45 /* r18 - platform register, currently not used */
46 static const sljit_u8 reg_map[SLJIT_NUMBER_OF_REGISTERS + 8] = {
47 31, 0, 1, 2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 15, 16, 17, 8, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 31, 9, 10, 30, 29
48 };
49
50 static const sljit_u8 freg_map[SLJIT_NUMBER_OF_FLOAT_REGISTERS + 3] = {
51 0, 0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 15, 14, 13, 12, 11, 10, 9, 8, 30, 31
52 };
53
54 #define W_OP ((sljit_ins)1 << 31)
55 #define RD(rd) ((sljit_ins)reg_map[rd])
56 #define RT(rt) ((sljit_ins)reg_map[rt])
57 #define RN(rn) ((sljit_ins)reg_map[rn] << 5)
58 #define RT2(rt2) ((sljit_ins)reg_map[rt2] << 10)
59 #define RM(rm) ((sljit_ins)reg_map[rm] << 16)
60 #define VD(vd) ((sljit_ins)freg_map[vd])
61 #define VT(vt) ((sljit_ins)freg_map[vt])
62 #define VT2(vt) ((sljit_ins)freg_map[vt] << 10)
63 #define VN(vn) ((sljit_ins)freg_map[vn] << 5)
64 #define VM(vm) ((sljit_ins)freg_map[vm] << 16)
65
66 /* --------------------------------------------------------------------- */
67 /* Instrucion forms */
68 /* --------------------------------------------------------------------- */
69
70 #define ADC 0x9a000000
71 #define ADD 0x8b000000
72 #define ADDE 0x8b200000
73 #define ADDI 0x91000000
74 #define AND 0x8a000000
75 #define ANDI 0x92000000
76 #define ASRV 0x9ac02800
77 #define B 0x14000000
78 #define B_CC 0x54000000
79 #define BL 0x94000000
80 #define BLR 0xd63f0000
81 #define BR 0xd61f0000
82 #define BRK 0xd4200000
83 #define CBZ 0xb4000000
84 #define CLZ 0xdac01000
85 #define CSEL 0x9a800000
86 #define CSINC 0x9a800400
87 #define EOR 0xca000000
88 #define EORI 0xd2000000
89 #define FABS 0x1e60c000
90 #define FADD 0x1e602800
91 #define FCMP 0x1e602000
92 #define FCVT 0x1e224000
93 #define FCVTZS 0x9e780000
94 #define FDIV 0x1e601800
95 #define FMOV 0x1e604000
96 #define FMUL 0x1e600800
97 #define FNEG 0x1e614000
98 #define FSUB 0x1e603800
99 #define LDRI 0xf9400000
100 #define LDRI_F64 0xfd400000
101 #define LDP 0xa9400000
102 #define LDP_F64 0x6d400000
103 #define LDP_POST 0xa8c00000
104 #define LDR_PRE 0xf8400c00
105 #define LSLV 0x9ac02000
106 #define LSRV 0x9ac02400
107 #define MADD 0x9b000000
108 #define MOVK 0xf2800000
109 #define MOVN 0x92800000
110 #define MOVZ 0xd2800000
111 #define NOP 0xd503201f
112 #define ORN 0xaa200000
113 #define ORR 0xaa000000
114 #define ORRI 0xb2000000
115 #define RET 0xd65f0000
116 #define SBC 0xda000000
117 #define SBFM 0x93000000
118 #define SCVTF 0x9e620000
119 #define SDIV 0x9ac00c00
120 #define SMADDL 0x9b200000
121 #define SMULH 0x9b403c00
122 #define STP 0xa9000000
123 #define STP_F64 0x6d000000
124 #define STP_PRE 0xa9800000
125 #define STRB 0x38206800
126 #define STRBI 0x39000000
127 #define STRI 0xf9000000
128 #define STRI_F64 0xfd000000
129 #define STR_FI 0x3d000000
130 #define STR_FR 0x3c206800
131 #define STUR_FI 0x3c000000
132 #define STURBI 0x38000000
133 #define SUB 0xcb000000
134 #define SUBI 0xd1000000
135 #define SUBS 0xeb000000
136 #define UBFM 0xd3000000
137 #define UDIV 0x9ac00800
138 #define UMULH 0x9bc03c00
139
140 /* dest_reg is the absolute name of the register
141 Useful for reordering instructions in the delay slot. */
push_inst(struct sljit_compiler * compiler,sljit_ins ins)142 static sljit_s32 push_inst(struct sljit_compiler *compiler, sljit_ins ins)
143 {
144 sljit_ins *ptr = (sljit_ins*)ensure_buf(compiler, sizeof(sljit_ins));
145 FAIL_IF(!ptr);
146 *ptr = ins;
147 compiler->size++;
148 return SLJIT_SUCCESS;
149 }
150
emit_imm64_const(struct sljit_compiler * compiler,sljit_s32 dst,sljit_uw imm)151 static SLJIT_INLINE sljit_s32 emit_imm64_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_uw imm)
152 {
153 FAIL_IF(push_inst(compiler, MOVZ | RD(dst) | ((sljit_ins)(imm & 0xffff) << 5)));
154 FAIL_IF(push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)(imm >> 16) & 0xffff) << 5) | (1 << 21)));
155 FAIL_IF(push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)(imm >> 32) & 0xffff) << 5) | (2 << 21)));
156 return push_inst(compiler, MOVK | RD(dst) | ((sljit_ins)(imm >> 48) << 5) | (3 << 21));
157 }
158
detect_jump_type(struct sljit_jump * jump,sljit_ins * code_ptr,sljit_ins * code,sljit_sw executable_offset)159 static SLJIT_INLINE sljit_sw detect_jump_type(struct sljit_jump *jump, sljit_ins *code_ptr, sljit_ins *code, sljit_sw executable_offset)
160 {
161 sljit_sw diff;
162 sljit_uw target_addr;
163
164 if (jump->flags & SLJIT_REWRITABLE_JUMP) {
165 jump->flags |= PATCH_ABS64;
166 return 0;
167 }
168
169 if (jump->flags & JUMP_ADDR)
170 target_addr = jump->u.target;
171 else {
172 SLJIT_ASSERT(jump->flags & JUMP_LABEL);
173 target_addr = (sljit_uw)(code + jump->u.label->size) + (sljit_uw)executable_offset;
174 }
175
176 diff = (sljit_sw)target_addr - (sljit_sw)(code_ptr + 4) - executable_offset;
177
178 if (jump->flags & IS_COND) {
179 diff += SSIZE_OF(ins);
180 if (diff <= 0xfffff && diff >= -0x100000) {
181 code_ptr[-5] ^= (jump->flags & IS_CBZ) ? (0x1 << 24) : 0x1;
182 jump->addr -= sizeof(sljit_ins);
183 jump->flags |= PATCH_COND;
184 return 5;
185 }
186 diff -= SSIZE_OF(ins);
187 }
188
189 if (diff <= 0x7ffffff && diff >= -0x8000000) {
190 jump->flags |= PATCH_B;
191 return 4;
192 }
193
194 if (target_addr < 0x100000000l) {
195 if (jump->flags & IS_COND)
196 code_ptr[-5] -= (2 << 5);
197 code_ptr[-2] = code_ptr[0];
198 return 2;
199 }
200
201 if (target_addr < 0x1000000000000l) {
202 if (jump->flags & IS_COND)
203 code_ptr[-5] -= (1 << 5);
204 jump->flags |= PATCH_ABS48;
205 code_ptr[-1] = code_ptr[0];
206 return 1;
207 }
208
209 jump->flags |= PATCH_ABS64;
210 return 0;
211 }
212
put_label_get_length(struct sljit_put_label * put_label,sljit_uw max_label)213 static SLJIT_INLINE sljit_sw put_label_get_length(struct sljit_put_label *put_label, sljit_uw max_label)
214 {
215 if (max_label < 0x100000000l) {
216 put_label->flags = 0;
217 return 2;
218 }
219
220 if (max_label < 0x1000000000000l) {
221 put_label->flags = 1;
222 return 1;
223 }
224
225 put_label->flags = 2;
226 return 0;
227 }
228
sljit_generate_code(struct sljit_compiler * compiler)229 SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler)
230 {
231 struct sljit_memory_fragment *buf;
232 sljit_ins *code;
233 sljit_ins *code_ptr;
234 sljit_ins *buf_ptr;
235 sljit_ins *buf_end;
236 sljit_uw word_count;
237 sljit_uw next_addr;
238 sljit_sw executable_offset;
239 sljit_sw addr;
240 sljit_u32 dst;
241
242 struct sljit_label *label;
243 struct sljit_jump *jump;
244 struct sljit_const *const_;
245 struct sljit_put_label *put_label;
246
247 CHECK_ERROR_PTR();
248 CHECK_PTR(check_sljit_generate_code(compiler));
249 reverse_buf(compiler);
250
251 code = (sljit_ins*)SLJIT_MALLOC_EXEC(compiler->size * sizeof(sljit_ins), compiler->exec_allocator_data);
252 PTR_FAIL_WITH_EXEC_IF(code);
253 buf = compiler->buf;
254
255 code_ptr = code;
256 word_count = 0;
257 next_addr = 0;
258 executable_offset = SLJIT_EXEC_OFFSET(code);
259
260 label = compiler->labels;
261 jump = compiler->jumps;
262 const_ = compiler->consts;
263 put_label = compiler->put_labels;
264
265 do {
266 buf_ptr = (sljit_ins*)buf->memory;
267 buf_end = buf_ptr + (buf->used_size >> 2);
268 do {
269 *code_ptr = *buf_ptr++;
270 if (next_addr == word_count) {
271 SLJIT_ASSERT(!label || label->size >= word_count);
272 SLJIT_ASSERT(!jump || jump->addr >= word_count);
273 SLJIT_ASSERT(!const_ || const_->addr >= word_count);
274 SLJIT_ASSERT(!put_label || put_label->addr >= word_count);
275
276 /* These structures are ordered by their address. */
277 if (label && label->size == word_count) {
278 label->addr = (sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
279 label->size = (sljit_uw)(code_ptr - code);
280 label = label->next;
281 }
282 if (jump && jump->addr == word_count) {
283 jump->addr = (sljit_uw)(code_ptr - 4);
284 code_ptr -= detect_jump_type(jump, code_ptr, code, executable_offset);
285 jump = jump->next;
286 }
287 if (const_ && const_->addr == word_count) {
288 const_->addr = (sljit_uw)code_ptr;
289 const_ = const_->next;
290 }
291 if (put_label && put_label->addr == word_count) {
292 SLJIT_ASSERT(put_label->label);
293 put_label->addr = (sljit_uw)(code_ptr - 3);
294 code_ptr -= put_label_get_length(put_label, (sljit_uw)(SLJIT_ADD_EXEC_OFFSET(code, executable_offset) + put_label->label->size));
295 put_label = put_label->next;
296 }
297 next_addr = compute_next_addr(label, jump, const_, put_label);
298 }
299 code_ptr ++;
300 word_count ++;
301 } while (buf_ptr < buf_end);
302
303 buf = buf->next;
304 } while (buf);
305
306 if (label && label->size == word_count) {
307 label->addr = (sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
308 label->size = (sljit_uw)(code_ptr - code);
309 label = label->next;
310 }
311
312 SLJIT_ASSERT(!label);
313 SLJIT_ASSERT(!jump);
314 SLJIT_ASSERT(!const_);
315 SLJIT_ASSERT(!put_label);
316 SLJIT_ASSERT(code_ptr - code <= (sljit_sw)compiler->size);
317
318 jump = compiler->jumps;
319 while (jump) {
320 do {
321 addr = (sljit_sw)((jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target);
322 buf_ptr = (sljit_ins *)jump->addr;
323
324 if (jump->flags & PATCH_B) {
325 addr = (addr - (sljit_sw)SLJIT_ADD_EXEC_OFFSET(buf_ptr, executable_offset)) >> 2;
326 SLJIT_ASSERT(addr <= 0x1ffffff && addr >= -0x2000000);
327 buf_ptr[0] = ((jump->flags & IS_BL) ? BL : B) | (sljit_ins)(addr & 0x3ffffff);
328 if (jump->flags & IS_COND)
329 buf_ptr[-1] -= (4 << 5);
330 break;
331 }
332 if (jump->flags & PATCH_COND) {
333 addr = (addr - (sljit_sw)SLJIT_ADD_EXEC_OFFSET(buf_ptr, executable_offset)) >> 2;
334 SLJIT_ASSERT(addr <= 0x3ffff && addr >= -0x40000);
335 buf_ptr[0] = (buf_ptr[0] & ~(sljit_ins)0xffffe0) | (sljit_ins)((addr & 0x7ffff) << 5);
336 break;
337 }
338
339 SLJIT_ASSERT((jump->flags & (PATCH_ABS48 | PATCH_ABS64)) || (sljit_uw)addr <= (sljit_uw)0xffffffff);
340 SLJIT_ASSERT((jump->flags & PATCH_ABS64) || (sljit_uw)addr <= (sljit_uw)0xffffffffffff);
341
342 dst = buf_ptr[0] & 0x1f;
343 buf_ptr[0] = MOVZ | dst | (((sljit_ins)addr & 0xffff) << 5);
344 buf_ptr[1] = MOVK | dst | (((sljit_ins)(addr >> 16) & 0xffff) << 5) | (1 << 21);
345 if (jump->flags & (PATCH_ABS48 | PATCH_ABS64))
346 buf_ptr[2] = MOVK | dst | (((sljit_ins)(addr >> 32) & 0xffff) << 5) | (2 << 21);
347 if (jump->flags & PATCH_ABS64)
348 buf_ptr[3] = MOVK | dst | ((sljit_ins)(addr >> 48) << 5) | (3 << 21);
349 } while (0);
350 jump = jump->next;
351 }
352
353 put_label = compiler->put_labels;
354 while (put_label) {
355 addr = (sljit_sw)put_label->label->addr;
356 buf_ptr = (sljit_ins*)put_label->addr;
357
358 buf_ptr[0] |= ((sljit_ins)addr & 0xffff) << 5;
359 buf_ptr[1] |= ((sljit_ins)(addr >> 16) & 0xffff) << 5;
360
361 if (put_label->flags >= 1)
362 buf_ptr[2] |= ((sljit_ins)(addr >> 32) & 0xffff) << 5;
363
364 if (put_label->flags >= 2)
365 buf_ptr[3] |= (sljit_ins)(addr >> 48) << 5;
366
367 put_label = put_label->next;
368 }
369
370 compiler->error = SLJIT_ERR_COMPILED;
371 compiler->executable_offset = executable_offset;
372 compiler->executable_size = (sljit_uw)(code_ptr - code) * sizeof(sljit_ins);
373
374 code = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(code, executable_offset);
375 code_ptr = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
376
377 SLJIT_CACHE_FLUSH(code, code_ptr);
378 SLJIT_UPDATE_WX_FLAGS(code, code_ptr, 1);
379 return code;
380 }
381
sljit_has_cpu_feature(sljit_s32 feature_type)382 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_has_cpu_feature(sljit_s32 feature_type)
383 {
384 switch (feature_type) {
385 case SLJIT_HAS_FPU:
386 #ifdef SLJIT_IS_FPU_AVAILABLE
387 return SLJIT_IS_FPU_AVAILABLE;
388 #else
389 /* Available by default. */
390 return 1;
391 #endif
392
393 case SLJIT_HAS_CLZ:
394 case SLJIT_HAS_CMOV:
395 case SLJIT_HAS_PREFETCH:
396 return 1;
397
398 default:
399 return 0;
400 }
401 }
402
403 /* --------------------------------------------------------------------- */
404 /* Core code generator functions. */
405 /* --------------------------------------------------------------------- */
406
407 #define COUNT_TRAILING_ZERO(value, result) \
408 result = 0; \
409 if (!(value & 0xffffffff)) { \
410 result += 32; \
411 value >>= 32; \
412 } \
413 if (!(value & 0xffff)) { \
414 result += 16; \
415 value >>= 16; \
416 } \
417 if (!(value & 0xff)) { \
418 result += 8; \
419 value >>= 8; \
420 } \
421 if (!(value & 0xf)) { \
422 result += 4; \
423 value >>= 4; \
424 } \
425 if (!(value & 0x3)) { \
426 result += 2; \
427 value >>= 2; \
428 } \
429 if (!(value & 0x1)) { \
430 result += 1; \
431 value >>= 1; \
432 }
433
434 #define LOGICAL_IMM_CHECK (sljit_ins)0x100
435
logical_imm(sljit_sw imm,sljit_u32 len)436 static sljit_ins logical_imm(sljit_sw imm, sljit_u32 len)
437 {
438 sljit_s32 negated;
439 sljit_u32 ones, right;
440 sljit_uw mask, uimm;
441 sljit_ins ins;
442
443 if (len & LOGICAL_IMM_CHECK) {
444 len &= ~LOGICAL_IMM_CHECK;
445 if (len == 32 && (imm == 0 || imm == -1))
446 return 0;
447 if (len == 16 && ((sljit_s32)imm == 0 || (sljit_s32)imm == -1))
448 return 0;
449 }
450
451 SLJIT_ASSERT((len == 32 && imm != 0 && imm != -1)
452 || (len == 16 && (sljit_s32)imm != 0 && (sljit_s32)imm != -1));
453
454 uimm = (sljit_uw)imm;
455 while (1) {
456 if (len <= 0) {
457 SLJIT_UNREACHABLE();
458 return 0;
459 }
460
461 mask = ((sljit_uw)1 << len) - 1;
462 if ((uimm & mask) != ((uimm >> len) & mask))
463 break;
464 len >>= 1;
465 }
466
467 len <<= 1;
468
469 negated = 0;
470 if (uimm & 0x1) {
471 negated = 1;
472 uimm = ~uimm;
473 }
474
475 if (len < 64)
476 uimm &= ((sljit_uw)1 << len) - 1;
477
478 /* Unsigned right shift. */
479 COUNT_TRAILING_ZERO(uimm, right);
480
481 /* Signed shift. We also know that the highest bit is set. */
482 imm = (sljit_sw)~uimm;
483 SLJIT_ASSERT(imm < 0);
484
485 COUNT_TRAILING_ZERO(imm, ones);
486
487 if (~imm)
488 return 0;
489
490 if (len == 64)
491 ins = 1 << 22;
492 else
493 ins = (0x3f - ((len << 1) - 1)) << 10;
494
495 if (negated)
496 return ins | ((len - ones - 1) << 10) | ((len - ones - right) << 16);
497
498 return ins | ((ones - 1) << 10) | ((len - right) << 16);
499 }
500
501 #undef COUNT_TRAILING_ZERO
502
load_immediate(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw simm)503 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw simm)
504 {
505 sljit_uw imm = (sljit_uw)simm;
506 sljit_u32 i, zeros, ones, first;
507 sljit_ins bitmask;
508
509 /* Handling simple immediates first. */
510 if (imm <= 0xffff)
511 return push_inst(compiler, MOVZ | RD(dst) | ((sljit_ins)imm << 5));
512
513 if (simm < 0 && simm >= -0x10000)
514 return push_inst(compiler, MOVN | RD(dst) | (((sljit_ins)~imm & 0xffff) << 5));
515
516 if (imm <= 0xffffffffl) {
517 if ((imm & 0xffff) == 0)
518 return push_inst(compiler, MOVZ | RD(dst) | ((sljit_ins)(imm >> 16) << 5) | (1 << 21));
519 if ((imm & 0xffff0000l) == 0xffff0000)
520 return push_inst(compiler, (MOVN ^ W_OP) | RD(dst) | (((sljit_ins)~imm & 0xffff) << 5));
521 if ((imm & 0xffff) == 0xffff)
522 return push_inst(compiler, (MOVN ^ W_OP) | RD(dst) | (((sljit_ins)~imm & 0xffff0000u) >> (16 - 5)) | (1 << 21));
523
524 bitmask = logical_imm(simm, 16);
525 if (bitmask != 0)
526 return push_inst(compiler, (ORRI ^ W_OP) | RD(dst) | RN(TMP_ZERO) | bitmask);
527
528 FAIL_IF(push_inst(compiler, MOVZ | RD(dst) | (((sljit_ins)imm & 0xffff) << 5)));
529 return push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)imm & 0xffff0000u) >> (16 - 5)) | (1 << 21));
530 }
531
532 bitmask = logical_imm(simm, 32);
533 if (bitmask != 0)
534 return push_inst(compiler, ORRI | RD(dst) | RN(TMP_ZERO) | bitmask);
535
536 if (simm < 0 && simm >= -0x100000000l) {
537 if ((imm & 0xffff) == 0xffff)
538 return push_inst(compiler, MOVN | RD(dst) | (((sljit_ins)~imm & 0xffff0000u) >> (16 - 5)) | (1 << 21));
539
540 FAIL_IF(push_inst(compiler, MOVN | RD(dst) | (((sljit_ins)~imm & 0xffff) << 5)));
541 return push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)imm & 0xffff0000u) >> (16 - 5)) | (1 << 21));
542 }
543
544 /* A large amount of number can be constructed from ORR and MOVx, but computing them is costly. */
545
546 zeros = 0;
547 ones = 0;
548 for (i = 4; i > 0; i--) {
549 if ((simm & 0xffff) == 0)
550 zeros++;
551 if ((simm & 0xffff) == 0xffff)
552 ones++;
553 simm >>= 16;
554 }
555
556 simm = (sljit_sw)imm;
557 first = 1;
558 if (ones > zeros) {
559 simm = ~simm;
560 for (i = 0; i < 4; i++) {
561 if (!(simm & 0xffff)) {
562 simm >>= 16;
563 continue;
564 }
565 if (first) {
566 first = 0;
567 FAIL_IF(push_inst(compiler, MOVN | RD(dst) | (((sljit_ins)simm & 0xffff) << 5) | (i << 21)));
568 }
569 else
570 FAIL_IF(push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)~simm & 0xffff) << 5) | (i << 21)));
571 simm >>= 16;
572 }
573 return SLJIT_SUCCESS;
574 }
575
576 for (i = 0; i < 4; i++) {
577 if (!(simm & 0xffff)) {
578 simm >>= 16;
579 continue;
580 }
581 if (first) {
582 first = 0;
583 FAIL_IF(push_inst(compiler, MOVZ | RD(dst) | (((sljit_ins)simm & 0xffff) << 5) | (i << 21)));
584 }
585 else
586 FAIL_IF(push_inst(compiler, MOVK | RD(dst) | (((sljit_ins)simm & 0xffff) << 5) | (i << 21)));
587 simm >>= 16;
588 }
589 return SLJIT_SUCCESS;
590 }
591
592 #define ARG1_IMM 0x0010000
593 #define ARG2_IMM 0x0020000
594 #define INT_OP 0x0040000
595 #define SET_FLAGS 0x0080000
596 #define UNUSED_RETURN 0x0100000
597
598 #define CHECK_FLAGS(flag_bits) \
599 if (flags & SET_FLAGS) { \
600 inv_bits |= flag_bits; \
601 if (flags & UNUSED_RETURN) \
602 dst = TMP_ZERO; \
603 }
604
emit_op_imm(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 dst,sljit_sw arg1,sljit_sw arg2)605 static sljit_s32 emit_op_imm(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 dst, sljit_sw arg1, sljit_sw arg2)
606 {
607 /* dst must be register, TMP_REG1
608 arg1 must be register, TMP_REG1, imm
609 arg2 must be register, TMP_REG2, imm */
610 sljit_ins inv_bits = (flags & INT_OP) ? W_OP : 0;
611 sljit_ins inst_bits;
612 sljit_s32 op = (flags & 0xffff);
613 sljit_s32 reg;
614 sljit_sw imm, nimm;
615
616 if (SLJIT_UNLIKELY((flags & (ARG1_IMM | ARG2_IMM)) == (ARG1_IMM | ARG2_IMM))) {
617 /* Both are immediates. */
618 flags &= ~ARG1_IMM;
619 if (arg1 == 0 && op != SLJIT_ADD && op != SLJIT_SUB)
620 arg1 = TMP_ZERO;
621 else {
622 FAIL_IF(load_immediate(compiler, TMP_REG1, arg1));
623 arg1 = TMP_REG1;
624 }
625 }
626
627 if (flags & (ARG1_IMM | ARG2_IMM)) {
628 reg = (sljit_s32)((flags & ARG2_IMM) ? arg1 : arg2);
629 imm = (flags & ARG2_IMM) ? arg2 : arg1;
630
631 switch (op) {
632 case SLJIT_MUL:
633 case SLJIT_CLZ:
634 case SLJIT_ADDC:
635 case SLJIT_SUBC:
636 /* No form with immediate operand (except imm 0, which
637 is represented by a ZERO register). */
638 break;
639 case SLJIT_MOV:
640 SLJIT_ASSERT(!(flags & SET_FLAGS) && (flags & ARG2_IMM) && arg1 == TMP_REG1);
641 return load_immediate(compiler, dst, imm);
642 case SLJIT_NOT:
643 SLJIT_ASSERT(flags & ARG2_IMM);
644 FAIL_IF(load_immediate(compiler, dst, (flags & INT_OP) ? (~imm & 0xffffffff) : ~imm));
645 goto set_flags;
646 case SLJIT_SUB:
647 compiler->status_flags_state = SLJIT_CURRENT_FLAGS_SUB;
648 if (flags & ARG1_IMM)
649 break;
650 imm = -imm;
651 /* Fall through. */
652 case SLJIT_ADD:
653 if (op != SLJIT_SUB)
654 compiler->status_flags_state = SLJIT_CURRENT_FLAGS_ADD;
655
656 if (imm == 0) {
657 CHECK_FLAGS(1 << 29);
658 return push_inst(compiler, ((op == SLJIT_ADD ? ADDI : SUBI) ^ inv_bits) | RD(dst) | RN(reg));
659 }
660 if (imm > 0 && imm <= 0xfff) {
661 CHECK_FLAGS(1 << 29);
662 return push_inst(compiler, (ADDI ^ inv_bits) | RD(dst) | RN(reg) | ((sljit_ins)imm << 10));
663 }
664 nimm = -imm;
665 if (nimm > 0 && nimm <= 0xfff) {
666 CHECK_FLAGS(1 << 29);
667 return push_inst(compiler, (SUBI ^ inv_bits) | RD(dst) | RN(reg) | ((sljit_ins)nimm << 10));
668 }
669 if (imm > 0 && imm <= 0xffffff && !(imm & 0xfff)) {
670 CHECK_FLAGS(1 << 29);
671 return push_inst(compiler, (ADDI ^ inv_bits) | RD(dst) | RN(reg) | (((sljit_ins)imm >> 12) << 10) | (1 << 22));
672 }
673 if (nimm > 0 && nimm <= 0xffffff && !(nimm & 0xfff)) {
674 CHECK_FLAGS(1 << 29);
675 return push_inst(compiler, (SUBI ^ inv_bits) | RD(dst) | RN(reg) | (((sljit_ins)nimm >> 12) << 10) | (1 << 22));
676 }
677 if (imm > 0 && imm <= 0xffffff && !(flags & SET_FLAGS)) {
678 FAIL_IF(push_inst(compiler, (ADDI ^ inv_bits) | RD(dst) | RN(reg) | (((sljit_ins)imm >> 12) << 10) | (1 << 22)));
679 return push_inst(compiler, (ADDI ^ inv_bits) | RD(dst) | RN(dst) | (((sljit_ins)imm & 0xfff) << 10));
680 }
681 if (nimm > 0 && nimm <= 0xffffff && !(flags & SET_FLAGS)) {
682 FAIL_IF(push_inst(compiler, (SUBI ^ inv_bits) | RD(dst) | RN(reg) | (((sljit_ins)nimm >> 12) << 10) | (1 << 22)));
683 return push_inst(compiler, (SUBI ^ inv_bits) | RD(dst) | RN(dst) | (((sljit_ins)nimm & 0xfff) << 10));
684 }
685 break;
686 case SLJIT_AND:
687 inst_bits = logical_imm(imm, LOGICAL_IMM_CHECK | ((flags & INT_OP) ? 16 : 32));
688 if (!inst_bits)
689 break;
690 CHECK_FLAGS(3 << 29);
691 return push_inst(compiler, (ANDI ^ inv_bits) | RD(dst) | RN(reg) | inst_bits);
692 case SLJIT_OR:
693 case SLJIT_XOR:
694 inst_bits = logical_imm(imm, LOGICAL_IMM_CHECK | ((flags & INT_OP) ? 16 : 32));
695 if (!inst_bits)
696 break;
697 if (op == SLJIT_OR)
698 inst_bits |= ORRI;
699 else
700 inst_bits |= EORI;
701 FAIL_IF(push_inst(compiler, (inst_bits ^ inv_bits) | RD(dst) | RN(reg)));
702 goto set_flags;
703 case SLJIT_SHL:
704 if (flags & ARG1_IMM)
705 break;
706 if (flags & INT_OP) {
707 imm &= 0x1f;
708 FAIL_IF(push_inst(compiler, (UBFM ^ inv_bits) | RD(dst) | RN(arg1)
709 | (((sljit_ins)-imm & 0x1f) << 16) | ((31 - (sljit_ins)imm) << 10)));
710 }
711 else {
712 imm &= 0x3f;
713 FAIL_IF(push_inst(compiler, (UBFM ^ inv_bits) | RD(dst) | RN(arg1) | (1 << 22)
714 | (((sljit_ins)-imm & 0x3f) << 16) | ((63 - (sljit_ins)imm) << 10)));
715 }
716 goto set_flags;
717 case SLJIT_LSHR:
718 case SLJIT_ASHR:
719 if (flags & ARG1_IMM)
720 break;
721 if (op == SLJIT_ASHR)
722 inv_bits |= 1 << 30;
723 if (flags & INT_OP) {
724 imm &= 0x1f;
725 FAIL_IF(push_inst(compiler, (UBFM ^ inv_bits) | RD(dst) | RN(arg1)
726 | ((sljit_ins)imm << 16) | (31 << 10)));
727 }
728 else {
729 imm &= 0x3f;
730 FAIL_IF(push_inst(compiler, (UBFM ^ inv_bits) | RD(dst) | RN(arg1)
731 | (1 << 22) | ((sljit_ins)imm << 16) | (63 << 10)));
732 }
733 goto set_flags;
734 default:
735 SLJIT_UNREACHABLE();
736 break;
737 }
738
739 if (flags & ARG2_IMM) {
740 if (arg2 == 0)
741 arg2 = TMP_ZERO;
742 else {
743 FAIL_IF(load_immediate(compiler, TMP_REG2, arg2));
744 arg2 = TMP_REG2;
745 }
746 }
747 else {
748 if (arg1 == 0)
749 arg1 = TMP_ZERO;
750 else {
751 FAIL_IF(load_immediate(compiler, TMP_REG1, arg1));
752 arg1 = TMP_REG1;
753 }
754 }
755 }
756
757 /* Both arguments are registers. */
758 switch (op) {
759 case SLJIT_MOV:
760 case SLJIT_MOV_P:
761 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
762 if (dst == arg2)
763 return SLJIT_SUCCESS;
764 return push_inst(compiler, ORR | RD(dst) | RN(TMP_ZERO) | RM(arg2));
765 case SLJIT_MOV_U8:
766 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
767 return push_inst(compiler, (UBFM ^ W_OP) | RD(dst) | RN(arg2) | (7 << 10));
768 case SLJIT_MOV_S8:
769 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
770 if (!(flags & INT_OP))
771 inv_bits |= 1 << 22;
772 return push_inst(compiler, (SBFM ^ inv_bits) | RD(dst) | RN(arg2) | (7 << 10));
773 case SLJIT_MOV_U16:
774 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
775 return push_inst(compiler, (UBFM ^ W_OP) | RD(dst) | RN(arg2) | (15 << 10));
776 case SLJIT_MOV_S16:
777 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
778 if (!(flags & INT_OP))
779 inv_bits |= 1 << 22;
780 return push_inst(compiler, (SBFM ^ inv_bits) | RD(dst) | RN(arg2) | (15 << 10));
781 case SLJIT_MOV32:
782 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
783 if (dst == arg2)
784 return SLJIT_SUCCESS;
785 /* fallthrough */
786 case SLJIT_MOV_U32:
787 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
788 return push_inst(compiler, (ORR ^ W_OP) | RD(dst) | RN(TMP_ZERO) | RM(arg2));
789 case SLJIT_MOV_S32:
790 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
791 return push_inst(compiler, SBFM | (1 << 22) | RD(dst) | RN(arg2) | (31 << 10));
792 case SLJIT_NOT:
793 SLJIT_ASSERT(arg1 == TMP_REG1);
794 FAIL_IF(push_inst(compiler, (ORN ^ inv_bits) | RD(dst) | RN(TMP_ZERO) | RM(arg2)));
795 break; /* Set flags. */
796 case SLJIT_CLZ:
797 SLJIT_ASSERT(arg1 == TMP_REG1);
798 return push_inst(compiler, (CLZ ^ inv_bits) | RD(dst) | RN(arg2));
799 case SLJIT_ADD:
800 compiler->status_flags_state = SLJIT_CURRENT_FLAGS_ADD;
801 CHECK_FLAGS(1 << 29);
802 return push_inst(compiler, (ADD ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2));
803 case SLJIT_ADDC:
804 compiler->status_flags_state = SLJIT_CURRENT_FLAGS_ADD;
805 CHECK_FLAGS(1 << 29);
806 return push_inst(compiler, (ADC ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2));
807 case SLJIT_SUB:
808 compiler->status_flags_state = SLJIT_CURRENT_FLAGS_SUB;
809 CHECK_FLAGS(1 << 29);
810 return push_inst(compiler, (SUB ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2));
811 case SLJIT_SUBC:
812 compiler->status_flags_state = SLJIT_CURRENT_FLAGS_SUB;
813 CHECK_FLAGS(1 << 29);
814 return push_inst(compiler, (SBC ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2));
815 case SLJIT_MUL:
816 compiler->status_flags_state = 0;
817 if (!(flags & SET_FLAGS))
818 return push_inst(compiler, (MADD ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2) | RT2(TMP_ZERO));
819 if (flags & INT_OP) {
820 FAIL_IF(push_inst(compiler, SMADDL | RD(dst) | RN(arg1) | RM(arg2) | (31 << 10)));
821 FAIL_IF(push_inst(compiler, ADD | RD(TMP_LR) | RN(TMP_ZERO) | RM(dst) | (2 << 22) | (31 << 10)));
822 return push_inst(compiler, SUBS | RD(TMP_ZERO) | RN(TMP_LR) | RM(dst) | (2 << 22) | (63 << 10));
823 }
824 FAIL_IF(push_inst(compiler, SMULH | RD(TMP_LR) | RN(arg1) | RM(arg2)));
825 FAIL_IF(push_inst(compiler, MADD | RD(dst) | RN(arg1) | RM(arg2) | RT2(TMP_ZERO)));
826 return push_inst(compiler, SUBS | RD(TMP_ZERO) | RN(TMP_LR) | RM(dst) | (2 << 22) | (63 << 10));
827 case SLJIT_AND:
828 CHECK_FLAGS(3 << 29);
829 return push_inst(compiler, (AND ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2));
830 case SLJIT_OR:
831 FAIL_IF(push_inst(compiler, (ORR ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2)));
832 break; /* Set flags. */
833 case SLJIT_XOR:
834 FAIL_IF(push_inst(compiler, (EOR ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2)));
835 break; /* Set flags. */
836 case SLJIT_SHL:
837 FAIL_IF(push_inst(compiler, (LSLV ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2)));
838 break; /* Set flags. */
839 case SLJIT_LSHR:
840 FAIL_IF(push_inst(compiler, (LSRV ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2)));
841 break; /* Set flags. */
842 case SLJIT_ASHR:
843 FAIL_IF(push_inst(compiler, (ASRV ^ inv_bits) | RD(dst) | RN(arg1) | RM(arg2)));
844 break; /* Set flags. */
845 default:
846 SLJIT_UNREACHABLE();
847 return SLJIT_SUCCESS;
848 }
849
850 set_flags:
851 if (flags & SET_FLAGS)
852 return push_inst(compiler, (SUBS ^ inv_bits) | RD(TMP_ZERO) | RN(dst) | RM(TMP_ZERO));
853 return SLJIT_SUCCESS;
854 }
855
856 #define STORE 0x10
857 #define SIGNED 0x20
858
859 #define BYTE_SIZE 0x0
860 #define HALF_SIZE 0x1
861 #define INT_SIZE 0x2
862 #define WORD_SIZE 0x3
863
864 #define MEM_SIZE_SHIFT(flags) ((sljit_ins)(flags) & 0x3)
865
emit_op_mem(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 reg,sljit_s32 arg,sljit_sw argw,sljit_s32 tmp_reg)866 static sljit_s32 emit_op_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg,
867 sljit_s32 arg, sljit_sw argw, sljit_s32 tmp_reg)
868 {
869 sljit_u32 shift = MEM_SIZE_SHIFT(flags);
870 sljit_u32 type = (shift << 30);
871
872 if (!(flags & STORE))
873 type |= (flags & SIGNED) ? 0x00800000 : 0x00400000;
874
875 SLJIT_ASSERT(arg & SLJIT_MEM);
876
877 if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
878 argw &= 0x3;
879
880 if (argw == 0 || argw == shift)
881 return push_inst(compiler, STRB | type | RT(reg)
882 | RN(arg & REG_MASK) | RM(OFFS_REG(arg)) | (argw ? (1 << 12) : 0));
883
884 FAIL_IF(push_inst(compiler, ADD | RD(tmp_reg) | RN(arg & REG_MASK) | RM(OFFS_REG(arg)) | ((sljit_ins)argw << 10)));
885 return push_inst(compiler, STRBI | type | RT(reg) | RN(tmp_reg));
886 }
887
888 arg &= REG_MASK;
889
890 if (!arg) {
891 FAIL_IF(load_immediate(compiler, tmp_reg, argw & ~(0xfff << shift)));
892
893 argw = (argw >> shift) & 0xfff;
894
895 return push_inst(compiler, STRBI | type | RT(reg) | RN(tmp_reg) | ((sljit_ins)argw << 10));
896 }
897
898 if (argw >= 0 && (argw & ((1 << shift) - 1)) == 0) {
899 if ((argw >> shift) <= 0xfff)
900 return push_inst(compiler, STRBI | type | RT(reg) | RN(arg) | ((sljit_ins)argw << (10 - shift)));
901
902 if (argw <= 0xffffff) {
903 FAIL_IF(push_inst(compiler, ADDI | (1 << 22) | RD(tmp_reg) | RN(arg) | (((sljit_ins)argw >> 12) << 10)));
904
905 argw = ((argw & 0xfff) >> shift);
906 return push_inst(compiler, STRBI | type | RT(reg) | RN(tmp_reg) | ((sljit_ins)argw << 10));
907 }
908 }
909
910 if (argw <= 255 && argw >= -256)
911 return push_inst(compiler, STURBI | type | RT(reg) | RN(arg) | (((sljit_ins)argw & 0x1ff) << 12));
912
913 FAIL_IF(load_immediate(compiler, tmp_reg, argw));
914
915 return push_inst(compiler, STRB | type | RT(reg) | RN(arg) | RM(tmp_reg));
916 }
917
918 /* --------------------------------------------------------------------- */
919 /* Entry, exit */
920 /* --------------------------------------------------------------------- */
921
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)922 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler,
923 sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
924 sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
925 {
926 sljit_s32 prev, fprev, saved_regs_size, i, tmp;
927 sljit_s32 word_arg_count = 0;
928 sljit_ins offs;
929
930 CHECK_ERROR();
931 CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
932 set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
933
934 saved_regs_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 2);
935 saved_regs_size += GET_SAVED_FLOAT_REGISTERS_SIZE(fscratches, fsaveds, SSIZE_OF(f64));
936
937 local_size = (local_size + saved_regs_size + 0xf) & ~0xf;
938 compiler->local_size = local_size;
939
940 if (local_size <= 512) {
941 FAIL_IF(push_inst(compiler, STP_PRE | RT(TMP_FP) | RT2(TMP_LR)
942 | RN(SLJIT_SP) | (sljit_ins)((-(local_size >> 3) & 0x7f) << 15)));
943 offs = (sljit_ins)(local_size - 2 * SSIZE_OF(sw)) << (15 - 3);
944 local_size = 0;
945 } else {
946 saved_regs_size = ((saved_regs_size - 2 * SSIZE_OF(sw)) + 0xf) & ~0xf;
947
948 FAIL_IF(push_inst(compiler, SUBI | RD(SLJIT_SP) | RN(SLJIT_SP) | ((sljit_ins)saved_regs_size << 10)));
949 offs = (sljit_ins)(saved_regs_size - 2 * SSIZE_OF(sw)) << (15 - 3);
950 local_size -= saved_regs_size;
951 SLJIT_ASSERT(local_size > 0);
952 }
953
954 prev = -1;
955
956 tmp = SLJIT_S0 - saveds;
957 for (i = SLJIT_S0; i > tmp; i--) {
958 if (prev == -1) {
959 prev = i;
960 continue;
961 }
962 FAIL_IF(push_inst(compiler, STP | RT(prev) | RT2(i) | RN(SLJIT_SP) | offs));
963 offs -= (sljit_ins)2 << 15;
964 prev = -1;
965 }
966
967 for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--) {
968 if (prev == -1) {
969 prev = i;
970 continue;
971 }
972 FAIL_IF(push_inst(compiler, STP | RT(prev) | RT2(i) | RN(SLJIT_SP) | offs));
973 offs -= (sljit_ins)2 << 15;
974 prev = -1;
975 }
976
977 fprev = -1;
978
979 tmp = SLJIT_FS0 - fsaveds;
980 for (i = SLJIT_FS0; i > tmp; i--) {
981 if (fprev == -1) {
982 fprev = i;
983 continue;
984 }
985 FAIL_IF(push_inst(compiler, STP_F64 | VT(fprev) | VT2(i) | RN(SLJIT_SP) | offs));
986 offs -= (sljit_ins)2 << 15;
987 fprev = -1;
988 }
989
990 for (i = fscratches; i >= SLJIT_FIRST_SAVED_FLOAT_REG; i--) {
991 if (fprev == -1) {
992 fprev = i;
993 continue;
994 }
995 FAIL_IF(push_inst(compiler, STP_F64 | VT(fprev) | VT2(i) | RN(SLJIT_SP) | offs));
996 offs -= (sljit_ins)2 << 15;
997 fprev = -1;
998 }
999
1000 if (fprev != -1)
1001 FAIL_IF(push_inst(compiler, STRI_F64 | VT(fprev) | RN(SLJIT_SP) | (offs >> 5) | (1 << 10)));
1002
1003 if (prev != -1)
1004 FAIL_IF(push_inst(compiler, STRI | RT(prev) | RN(SLJIT_SP) | (offs >> 5) | ((fprev == -1) ? (1 << 10) : 0)));
1005
1006 arg_types >>= SLJIT_ARG_SHIFT;
1007
1008 #ifdef _WIN32
1009 if (local_size > 4096)
1010 FAIL_IF(push_inst(compiler, SUBI | RD(SLJIT_SP) | RN(SLJIT_SP) | (1 << 10) | (1 << 22)));
1011 #endif /* _WIN32 */
1012
1013 tmp = 0;
1014 while (arg_types > 0) {
1015 if ((arg_types & SLJIT_ARG_MASK) < SLJIT_ARG_TYPE_F64) {
1016 if (!(arg_types & SLJIT_ARG_TYPE_SCRATCH_REG)) {
1017 FAIL_IF(push_inst(compiler, ORR | RD(SLJIT_S0 - tmp) | RN(TMP_ZERO) | RM(SLJIT_R0 + word_arg_count)));
1018 tmp++;
1019 }
1020 word_arg_count++;
1021 }
1022 arg_types >>= SLJIT_ARG_SHIFT;
1023 }
1024
1025 #ifdef _WIN32
1026 if (local_size > 4096) {
1027 if (local_size < 4 * 4096) {
1028 /* No need for a loop. */
1029
1030 if (local_size >= 2 * 4096) {
1031 if (local_size >= 3 * 4096) {
1032 FAIL_IF(push_inst(compiler, LDRI | RT(TMP_ZERO) | RN(SLJIT_SP)));
1033 FAIL_IF(push_inst(compiler, SUBI | RD(SLJIT_SP) | RN(SLJIT_SP) | (1 << 10) | (1 << 22)));
1034 }
1035
1036 FAIL_IF(push_inst(compiler, LDRI | RT(TMP_ZERO) | RN(SLJIT_SP)));
1037 FAIL_IF(push_inst(compiler, SUBI | RD(SLJIT_SP) | RN(SLJIT_SP) | (1 << 10) | (1 << 22)));
1038 }
1039 }
1040 else {
1041 FAIL_IF(push_inst(compiler, MOVZ | RD(TMP_REG1) | ((((sljit_ins)local_size >> 12) - 1) << 5)));
1042 FAIL_IF(push_inst(compiler, LDRI | RT(TMP_ZERO) | RN(SLJIT_SP)));
1043 FAIL_IF(push_inst(compiler, SUBI | RD(SLJIT_SP) | RN(SLJIT_SP) | (1 << 10) | (1 << 22)));
1044 FAIL_IF(push_inst(compiler, SUBI | (1 << 29) | RD(TMP_REG1) | RN(TMP_REG1) | (1 << 10)));
1045 FAIL_IF(push_inst(compiler, B_CC | ((((sljit_ins) -3) & 0x7ffff) << 5) | 0x1 /* not-equal */));
1046 }
1047
1048 local_size &= 0xfff;
1049
1050 if (local_size > 0)
1051 FAIL_IF(push_inst(compiler, LDRI | RT(TMP_ZERO) | RN(SLJIT_SP)));
1052 else
1053 FAIL_IF(push_inst(compiler, STP | RT(TMP_FP) | RT2(TMP_LR) | RN(SLJIT_SP)));
1054 }
1055
1056 if (local_size > 0) {
1057 if (local_size <= 512)
1058 FAIL_IF(push_inst(compiler, STP_PRE | RT(TMP_FP) | RT2(TMP_LR)
1059 | RN(SLJIT_SP) | (sljit_ins)((-(local_size >> 3) & 0x7f) << 15)));
1060 else {
1061 if (local_size >= 4096)
1062 local_size = (1 << (22 - 10));
1063
1064 FAIL_IF(push_inst(compiler, SUBI | RD(SLJIT_SP) | RN(SLJIT_SP) | ((sljit_ins)local_size << 10)));
1065 FAIL_IF(push_inst(compiler, STP | RT(TMP_FP) | RT2(TMP_LR) | RN(SLJIT_SP)));
1066 }
1067 }
1068
1069 #else /* !_WIN32 */
1070
1071 /* The local_size does not include saved registers size. */
1072 if (local_size != 0) {
1073 if (local_size > 0xfff) {
1074 FAIL_IF(push_inst(compiler, SUBI | RD(SLJIT_SP) | RN(SLJIT_SP) | (((sljit_ins)local_size >> 12) << 10) | (1 << 22)));
1075 local_size &= 0xfff;
1076 }
1077
1078 if (local_size > 512 || local_size == 0) {
1079 if (local_size != 0)
1080 FAIL_IF(push_inst(compiler, SUBI | RD(SLJIT_SP) | RN(SLJIT_SP) | ((sljit_ins)local_size << 10)));
1081
1082 FAIL_IF(push_inst(compiler, STP | RT(TMP_FP) | RT2(TMP_LR) | RN(SLJIT_SP)));
1083 } else
1084 FAIL_IF(push_inst(compiler, STP_PRE | RT(TMP_FP) | RT2(TMP_LR)
1085 | RN(SLJIT_SP) | (sljit_ins)((-(local_size >> 3) & 0x7f) << 15)));
1086 }
1087
1088 #endif /* _WIN32 */
1089
1090 return push_inst(compiler, ADDI | RD(TMP_FP) | RN(SLJIT_SP) | (0 << 10));
1091 }
1092
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)1093 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler,
1094 sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
1095 sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
1096 {
1097 sljit_s32 saved_regs_size;
1098
1099 CHECK_ERROR();
1100 CHECK(check_sljit_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
1101 set_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
1102
1103 saved_regs_size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 2);
1104 saved_regs_size += GET_SAVED_FLOAT_REGISTERS_SIZE(fscratches, fsaveds, SSIZE_OF(f64));
1105
1106 compiler->local_size = (local_size + saved_regs_size + 0xf) & ~0xf;
1107 return SLJIT_SUCCESS;
1108 }
1109
emit_stack_frame_release(struct sljit_compiler * compiler)1110 static sljit_s32 emit_stack_frame_release(struct sljit_compiler *compiler)
1111 {
1112 sljit_s32 local_size, prev, fprev, i, tmp;
1113 sljit_ins offs;
1114
1115 local_size = compiler->local_size;
1116
1117 if (local_size > 512 && local_size <= 512 + 496) {
1118 FAIL_IF(push_inst(compiler, LDP_POST | RT(TMP_FP) | RT2(TMP_LR)
1119 | RN(SLJIT_SP) | ((sljit_ins)(local_size - 512) << (15 - 3))));
1120 local_size = 512;
1121 } else
1122 FAIL_IF(push_inst(compiler, LDP | RT(TMP_FP) | RT2(TMP_LR) | RN(SLJIT_SP)));
1123
1124 if (local_size > 512) {
1125 local_size -= 512;
1126 if (local_size > 0xfff) {
1127 FAIL_IF(push_inst(compiler, ADDI | RD(SLJIT_SP) | RN(SLJIT_SP)
1128 | (((sljit_ins)local_size >> 12) << 10) | (1 << 22)));
1129 local_size &= 0xfff;
1130 }
1131
1132 FAIL_IF(push_inst(compiler, ADDI | RD(SLJIT_SP) | RN(SLJIT_SP) | ((sljit_ins)local_size << 10)));
1133 local_size = 512;
1134 }
1135
1136 offs = (sljit_ins)(local_size - 2 * SSIZE_OF(sw)) << (15 - 3);
1137 prev = -1;
1138
1139 tmp = SLJIT_S0 - compiler->saveds;
1140 for (i = SLJIT_S0; i > tmp; i--) {
1141 if (prev == -1) {
1142 prev = i;
1143 continue;
1144 }
1145 FAIL_IF(push_inst(compiler, LDP | RT(prev) | RT2(i) | RN(SLJIT_SP) | offs));
1146 offs -= (sljit_ins)2 << 15;
1147 prev = -1;
1148 }
1149
1150 for (i = compiler->scratches; i >= SLJIT_FIRST_SAVED_REG; i--) {
1151 if (prev == -1) {
1152 prev = i;
1153 continue;
1154 }
1155 FAIL_IF(push_inst(compiler, LDP | RT(prev) | RT2(i) | RN(SLJIT_SP) | offs));
1156 offs -= (sljit_ins)2 << 15;
1157 prev = -1;
1158 }
1159
1160 fprev = -1;
1161
1162 tmp = SLJIT_FS0 - compiler->fsaveds;
1163 for (i = SLJIT_FS0; i > tmp; i--) {
1164 if (fprev == -1) {
1165 fprev = i;
1166 continue;
1167 }
1168 FAIL_IF(push_inst(compiler, LDP_F64 | VT(fprev) | VT2(i) | RN(SLJIT_SP) | offs));
1169 offs -= (sljit_ins)2 << 15;
1170 fprev = -1;
1171 }
1172
1173 for (i = compiler->fscratches; i >= SLJIT_FIRST_SAVED_FLOAT_REG; i--) {
1174 if (fprev == -1) {
1175 fprev = i;
1176 continue;
1177 }
1178 FAIL_IF(push_inst(compiler, LDP_F64 | VT(fprev) | VT2(i) | RN(SLJIT_SP) | offs));
1179 offs -= (sljit_ins)2 << 15;
1180 fprev = -1;
1181 }
1182
1183 if (fprev != -1)
1184 FAIL_IF(push_inst(compiler, LDRI_F64 | VT(fprev) | RN(SLJIT_SP) | (offs >> 5) | (1 << 10)));
1185
1186 if (prev != -1)
1187 FAIL_IF(push_inst(compiler, LDRI | RT(prev) | RN(SLJIT_SP) | (offs >> 5) | ((fprev == -1) ? (1 << 10) : 0)));
1188
1189 /* This and the next call/jump instruction can be executed parallelly. */
1190 return push_inst(compiler, ADDI | RD(SLJIT_SP) | RN(SLJIT_SP) | (sljit_ins)(local_size << 10));
1191 }
1192
sljit_emit_return_void(struct sljit_compiler * compiler)1193 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return_void(struct sljit_compiler *compiler)
1194 {
1195 CHECK_ERROR();
1196 CHECK(check_sljit_emit_return_void(compiler));
1197
1198 FAIL_IF(emit_stack_frame_release(compiler));
1199
1200 return push_inst(compiler, RET | RN(TMP_LR));
1201 }
1202
1203 /* --------------------------------------------------------------------- */
1204 /* Operators */
1205 /* --------------------------------------------------------------------- */
1206
sljit_emit_op0(struct sljit_compiler * compiler,sljit_s32 op)1207 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op0(struct sljit_compiler *compiler, sljit_s32 op)
1208 {
1209 sljit_ins inv_bits = (op & SLJIT_32) ? W_OP : 0;
1210
1211 CHECK_ERROR();
1212 CHECK(check_sljit_emit_op0(compiler, op));
1213
1214 op = GET_OPCODE(op);
1215 switch (op) {
1216 case SLJIT_BREAKPOINT:
1217 return push_inst(compiler, BRK);
1218 case SLJIT_NOP:
1219 return push_inst(compiler, NOP);
1220 case SLJIT_LMUL_UW:
1221 case SLJIT_LMUL_SW:
1222 FAIL_IF(push_inst(compiler, ORR | RD(TMP_REG1) | RN(TMP_ZERO) | RM(SLJIT_R0)));
1223 FAIL_IF(push_inst(compiler, MADD | RD(SLJIT_R0) | RN(SLJIT_R0) | RM(SLJIT_R1) | RT2(TMP_ZERO)));
1224 return push_inst(compiler, (op == SLJIT_LMUL_UW ? UMULH : SMULH) | RD(SLJIT_R1) | RN(TMP_REG1) | RM(SLJIT_R1));
1225 case SLJIT_DIVMOD_UW:
1226 case SLJIT_DIVMOD_SW:
1227 FAIL_IF(push_inst(compiler, (ORR ^ inv_bits) | RD(TMP_REG1) | RN(TMP_ZERO) | RM(SLJIT_R0)));
1228 FAIL_IF(push_inst(compiler, ((op == SLJIT_DIVMOD_UW ? UDIV : SDIV) ^ inv_bits) | RD(SLJIT_R0) | RN(SLJIT_R0) | RM(SLJIT_R1)));
1229 FAIL_IF(push_inst(compiler, (MADD ^ inv_bits) | RD(SLJIT_R1) | RN(SLJIT_R0) | RM(SLJIT_R1) | RT2(TMP_ZERO)));
1230 return push_inst(compiler, (SUB ^ inv_bits) | RD(SLJIT_R1) | RN(TMP_REG1) | RM(SLJIT_R1));
1231 case SLJIT_DIV_UW:
1232 case SLJIT_DIV_SW:
1233 return push_inst(compiler, ((op == SLJIT_DIV_UW ? UDIV : SDIV) ^ inv_bits) | RD(SLJIT_R0) | RN(SLJIT_R0) | RM(SLJIT_R1));
1234 case SLJIT_ENDBR:
1235 case SLJIT_SKIP_FRAMES_BEFORE_RETURN:
1236 return SLJIT_SUCCESS;
1237 }
1238
1239 return SLJIT_SUCCESS;
1240 }
1241
sljit_emit_op1(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1242 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op1(struct sljit_compiler *compiler, sljit_s32 op,
1243 sljit_s32 dst, sljit_sw dstw,
1244 sljit_s32 src, sljit_sw srcw)
1245 {
1246 sljit_s32 dst_r, flags, mem_flags;
1247 sljit_s32 op_flags = GET_ALL_FLAGS(op);
1248
1249 CHECK_ERROR();
1250 CHECK(check_sljit_emit_op1(compiler, op, dst, dstw, src, srcw));
1251 ADJUST_LOCAL_OFFSET(dst, dstw);
1252 ADJUST_LOCAL_OFFSET(src, srcw);
1253
1254 dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
1255
1256 op = GET_OPCODE(op);
1257 if (op >= SLJIT_MOV && op <= SLJIT_MOV_P) {
1258 /* Both operands are registers. */
1259 if (dst_r != TMP_REG1 && FAST_IS_REG(src))
1260 return emit_op_imm(compiler, op | ((op_flags & SLJIT_32) ? INT_OP : 0), dst_r, TMP_REG1, src);
1261
1262 switch (op) {
1263 case SLJIT_MOV:
1264 case SLJIT_MOV_P:
1265 mem_flags = WORD_SIZE;
1266 break;
1267 case SLJIT_MOV_U8:
1268 mem_flags = BYTE_SIZE;
1269 if (src & SLJIT_IMM)
1270 srcw = (sljit_u8)srcw;
1271 break;
1272 case SLJIT_MOV_S8:
1273 mem_flags = BYTE_SIZE | SIGNED;
1274 if (src & SLJIT_IMM)
1275 srcw = (sljit_s8)srcw;
1276 break;
1277 case SLJIT_MOV_U16:
1278 mem_flags = HALF_SIZE;
1279 if (src & SLJIT_IMM)
1280 srcw = (sljit_u16)srcw;
1281 break;
1282 case SLJIT_MOV_S16:
1283 mem_flags = HALF_SIZE | SIGNED;
1284 if (src & SLJIT_IMM)
1285 srcw = (sljit_s16)srcw;
1286 break;
1287 case SLJIT_MOV_U32:
1288 mem_flags = INT_SIZE;
1289 if (src & SLJIT_IMM)
1290 srcw = (sljit_u32)srcw;
1291 break;
1292 case SLJIT_MOV_S32:
1293 case SLJIT_MOV32:
1294 mem_flags = INT_SIZE | SIGNED;
1295 if (src & SLJIT_IMM)
1296 srcw = (sljit_s32)srcw;
1297 break;
1298 default:
1299 SLJIT_UNREACHABLE();
1300 mem_flags = 0;
1301 break;
1302 }
1303
1304 if (src & SLJIT_IMM)
1305 FAIL_IF(emit_op_imm(compiler, SLJIT_MOV | ARG2_IMM, dst_r, TMP_REG1, srcw));
1306 else if (!(src & SLJIT_MEM))
1307 dst_r = src;
1308 else
1309 FAIL_IF(emit_op_mem(compiler, mem_flags, dst_r, src, srcw, TMP_REG1));
1310
1311 if (dst & SLJIT_MEM)
1312 return emit_op_mem(compiler, mem_flags | STORE, dst_r, dst, dstw, TMP_REG2);
1313 return SLJIT_SUCCESS;
1314 }
1315
1316 flags = HAS_FLAGS(op_flags) ? SET_FLAGS : 0;
1317 mem_flags = WORD_SIZE;
1318
1319 if (op_flags & SLJIT_32) {
1320 flags |= INT_OP;
1321 mem_flags = INT_SIZE;
1322 }
1323
1324 if (src & SLJIT_MEM) {
1325 FAIL_IF(emit_op_mem(compiler, mem_flags, TMP_REG2, src, srcw, TMP_REG2));
1326 src = TMP_REG2;
1327 }
1328
1329 emit_op_imm(compiler, flags | op, dst_r, TMP_REG1, src);
1330
1331 if (SLJIT_UNLIKELY(dst & SLJIT_MEM))
1332 return emit_op_mem(compiler, mem_flags | STORE, dst_r, dst, dstw, TMP_REG2);
1333 return SLJIT_SUCCESS;
1334 }
1335
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)1336 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op2(struct sljit_compiler *compiler, sljit_s32 op,
1337 sljit_s32 dst, sljit_sw dstw,
1338 sljit_s32 src1, sljit_sw src1w,
1339 sljit_s32 src2, sljit_sw src2w)
1340 {
1341 sljit_s32 dst_r, flags, mem_flags;
1342
1343 CHECK_ERROR();
1344 CHECK(check_sljit_emit_op2(compiler, op, 0, dst, dstw, src1, src1w, src2, src2w));
1345 ADJUST_LOCAL_OFFSET(dst, dstw);
1346 ADJUST_LOCAL_OFFSET(src1, src1w);
1347 ADJUST_LOCAL_OFFSET(src2, src2w);
1348
1349 dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
1350 flags = HAS_FLAGS(op) ? SET_FLAGS : 0;
1351 mem_flags = WORD_SIZE;
1352
1353 if (op & SLJIT_32) {
1354 flags |= INT_OP;
1355 mem_flags = INT_SIZE;
1356 }
1357
1358 if (dst == TMP_REG1)
1359 flags |= UNUSED_RETURN;
1360
1361 if (src1 & SLJIT_MEM) {
1362 FAIL_IF(emit_op_mem(compiler, mem_flags, TMP_REG1, src1, src1w, TMP_REG1));
1363 src1 = TMP_REG1;
1364 }
1365
1366 if (src2 & SLJIT_MEM) {
1367 FAIL_IF(emit_op_mem(compiler, mem_flags, TMP_REG2, src2, src2w, TMP_REG2));
1368 src2 = TMP_REG2;
1369 }
1370
1371 if (src1 & SLJIT_IMM)
1372 flags |= ARG1_IMM;
1373 else
1374 src1w = src1;
1375
1376 if (src2 & SLJIT_IMM)
1377 flags |= ARG2_IMM;
1378 else
1379 src2w = src2;
1380
1381 emit_op_imm(compiler, flags | GET_OPCODE(op), dst_r, src1w, src2w);
1382
1383 if (dst & SLJIT_MEM)
1384 return emit_op_mem(compiler, mem_flags | STORE, dst_r, dst, dstw, TMP_REG2);
1385 return SLJIT_SUCCESS;
1386 }
1387
sljit_emit_op2u(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src1,sljit_sw src1w,sljit_s32 src2,sljit_sw src2w)1388 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op2u(struct sljit_compiler *compiler, sljit_s32 op,
1389 sljit_s32 src1, sljit_sw src1w,
1390 sljit_s32 src2, sljit_sw src2w)
1391 {
1392 CHECK_ERROR();
1393 CHECK(check_sljit_emit_op2(compiler, op, 1, 0, 0, src1, src1w, src2, src2w));
1394
1395 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
1396 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
1397 compiler->skip_checks = 1;
1398 #endif
1399 return sljit_emit_op2(compiler, op, TMP_REG1, 0, src1, src1w, src2, src2w);
1400 }
1401
sljit_emit_op_src(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src,sljit_sw srcw)1402 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_src(struct sljit_compiler *compiler, sljit_s32 op,
1403 sljit_s32 src, sljit_sw srcw)
1404 {
1405 CHECK_ERROR();
1406 CHECK(check_sljit_emit_op_src(compiler, op, src, srcw));
1407 ADJUST_LOCAL_OFFSET(src, srcw);
1408
1409 switch (op) {
1410 case SLJIT_FAST_RETURN:
1411 if (FAST_IS_REG(src))
1412 FAIL_IF(push_inst(compiler, ORR | RD(TMP_LR) | RN(TMP_ZERO) | RM(src)));
1413 else
1414 FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_LR, src, srcw, TMP_REG1));
1415
1416 return push_inst(compiler, RET | RN(TMP_LR));
1417 case SLJIT_SKIP_FRAMES_BEFORE_FAST_RETURN:
1418 return SLJIT_SUCCESS;
1419 case SLJIT_PREFETCH_L1:
1420 case SLJIT_PREFETCH_L2:
1421 case SLJIT_PREFETCH_L3:
1422 case SLJIT_PREFETCH_ONCE:
1423 SLJIT_ASSERT(reg_map[1] == 0 && reg_map[3] == 2 && reg_map[5] == 4);
1424
1425 /* The reg_map[op] should provide the appropriate constant. */
1426 if (op == SLJIT_PREFETCH_L1)
1427 op = 1;
1428 else if (op == SLJIT_PREFETCH_L2)
1429 op = 3;
1430 else if (op == SLJIT_PREFETCH_L3)
1431 op = 5;
1432 else
1433 op = 2;
1434
1435 /* Signed word sized load is the prefetch instruction. */
1436 return emit_op_mem(compiler, WORD_SIZE | SIGNED, op, src, srcw, TMP_REG1);
1437 }
1438
1439 return SLJIT_SUCCESS;
1440 }
1441
sljit_get_register_index(sljit_s32 reg)1442 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_register_index(sljit_s32 reg)
1443 {
1444 CHECK_REG_INDEX(check_sljit_get_register_index(reg));
1445 return reg_map[reg];
1446 }
1447
sljit_get_float_register_index(sljit_s32 reg)1448 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_float_register_index(sljit_s32 reg)
1449 {
1450 CHECK_REG_INDEX(check_sljit_get_float_register_index(reg));
1451 return freg_map[reg];
1452 }
1453
sljit_emit_op_custom(struct sljit_compiler * compiler,void * instruction,sljit_u32 size)1454 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_custom(struct sljit_compiler *compiler,
1455 void *instruction, sljit_u32 size)
1456 {
1457 SLJIT_UNUSED_ARG(size);
1458 CHECK_ERROR();
1459 CHECK(check_sljit_emit_op_custom(compiler, instruction, size));
1460
1461 return push_inst(compiler, *(sljit_ins*)instruction);
1462 }
1463
1464 /* --------------------------------------------------------------------- */
1465 /* Floating point operators */
1466 /* --------------------------------------------------------------------- */
1467
emit_fop_mem(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 reg,sljit_s32 arg,sljit_sw argw)1468 static sljit_s32 emit_fop_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg, sljit_s32 arg, sljit_sw argw)
1469 {
1470 sljit_u32 shift = MEM_SIZE_SHIFT(flags);
1471 sljit_ins type = (shift << 30);
1472
1473 SLJIT_ASSERT(arg & SLJIT_MEM);
1474
1475 if (!(flags & STORE))
1476 type |= 0x00400000;
1477
1478 if (arg & OFFS_REG_MASK) {
1479 argw &= 3;
1480 if (argw == 0 || argw == shift)
1481 return push_inst(compiler, STR_FR | type | VT(reg)
1482 | RN(arg & REG_MASK) | RM(OFFS_REG(arg)) | (argw ? (1 << 12) : 0));
1483
1484 FAIL_IF(push_inst(compiler, ADD | RD(TMP_REG1) | RN(arg & REG_MASK) | RM(OFFS_REG(arg)) | ((sljit_ins)argw << 10)));
1485 return push_inst(compiler, STR_FI | type | VT(reg) | RN(TMP_REG1));
1486 }
1487
1488 arg &= REG_MASK;
1489
1490 if (!arg) {
1491 FAIL_IF(load_immediate(compiler, TMP_REG1, argw & ~(0xfff << shift)));
1492
1493 argw = (argw >> shift) & 0xfff;
1494
1495 return push_inst(compiler, STR_FI | type | VT(reg) | RN(TMP_REG1) | ((sljit_ins)argw << 10));
1496 }
1497
1498 if (argw >= 0 && (argw & ((1 << shift) - 1)) == 0) {
1499 if ((argw >> shift) <= 0xfff)
1500 return push_inst(compiler, STR_FI | type | VT(reg) | RN(arg) | ((sljit_ins)argw << (10 - shift)));
1501
1502 if (argw <= 0xffffff) {
1503 FAIL_IF(push_inst(compiler, ADDI | (1 << 22) | RD(TMP_REG1) | RN(arg) | (((sljit_ins)argw >> 12) << 10)));
1504
1505 argw = ((argw & 0xfff) >> shift);
1506 return push_inst(compiler, STR_FI | type | VT(reg) | RN(TMP_REG1) | ((sljit_ins)argw << 10));
1507 }
1508 }
1509
1510 if (argw <= 255 && argw >= -256)
1511 return push_inst(compiler, STUR_FI | type | VT(reg) | RN(arg) | (((sljit_ins)argw & 0x1ff) << 12));
1512
1513 FAIL_IF(load_immediate(compiler, TMP_REG1, argw));
1514 return push_inst(compiler, STR_FR | type | VT(reg) | RN(arg) | RM(TMP_REG1));
1515 }
1516
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)1517 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_sw_from_f64(struct sljit_compiler *compiler, sljit_s32 op,
1518 sljit_s32 dst, sljit_sw dstw,
1519 sljit_s32 src, sljit_sw srcw)
1520 {
1521 sljit_s32 dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
1522 sljit_ins inv_bits = (op & SLJIT_32) ? (1 << 22) : 0;
1523
1524 if (GET_OPCODE(op) == SLJIT_CONV_S32_FROM_F64)
1525 inv_bits |= W_OP;
1526
1527 if (src & SLJIT_MEM) {
1528 emit_fop_mem(compiler, (op & SLJIT_32) ? INT_SIZE : WORD_SIZE, TMP_FREG1, src, srcw);
1529 src = TMP_FREG1;
1530 }
1531
1532 FAIL_IF(push_inst(compiler, (FCVTZS ^ inv_bits) | RD(dst_r) | VN(src)));
1533
1534 if (dst & SLJIT_MEM)
1535 return emit_op_mem(compiler, ((GET_OPCODE(op) == SLJIT_CONV_S32_FROM_F64) ? INT_SIZE : WORD_SIZE) | STORE, TMP_REG1, dst, dstw, TMP_REG2);
1536 return SLJIT_SUCCESS;
1537 }
1538
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)1539 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_f64_from_sw(struct sljit_compiler *compiler, sljit_s32 op,
1540 sljit_s32 dst, sljit_sw dstw,
1541 sljit_s32 src, sljit_sw srcw)
1542 {
1543 sljit_s32 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1544 sljit_ins inv_bits = (op & SLJIT_32) ? (1 << 22) : 0;
1545
1546 if (GET_OPCODE(op) == SLJIT_CONV_F64_FROM_S32)
1547 inv_bits |= W_OP;
1548
1549 if (src & SLJIT_MEM) {
1550 emit_op_mem(compiler, ((GET_OPCODE(op) == SLJIT_CONV_F64_FROM_S32) ? INT_SIZE : WORD_SIZE), TMP_REG1, src, srcw, TMP_REG1);
1551 src = TMP_REG1;
1552 } else if (src & SLJIT_IMM) {
1553 #if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
1554 if (GET_OPCODE(op) == SLJIT_CONV_F64_FROM_S32)
1555 srcw = (sljit_s32)srcw;
1556 #endif
1557 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
1558 src = TMP_REG1;
1559 }
1560
1561 FAIL_IF(push_inst(compiler, (SCVTF ^ inv_bits) | VD(dst_r) | RN(src)));
1562
1563 if (dst & SLJIT_MEM)
1564 return emit_fop_mem(compiler, ((op & SLJIT_32) ? INT_SIZE : WORD_SIZE) | STORE, TMP_FREG1, dst, dstw);
1565 return SLJIT_SUCCESS;
1566 }
1567
sljit_emit_fop1_cmp(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src1,sljit_sw src1w,sljit_s32 src2,sljit_sw src2w)1568 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_cmp(struct sljit_compiler *compiler, sljit_s32 op,
1569 sljit_s32 src1, sljit_sw src1w,
1570 sljit_s32 src2, sljit_sw src2w)
1571 {
1572 sljit_s32 mem_flags = (op & SLJIT_32) ? INT_SIZE : WORD_SIZE;
1573 sljit_ins inv_bits = (op & SLJIT_32) ? (1 << 22) : 0;
1574
1575 if (src1 & SLJIT_MEM) {
1576 emit_fop_mem(compiler, mem_flags, TMP_FREG1, src1, src1w);
1577 src1 = TMP_FREG1;
1578 }
1579
1580 if (src2 & SLJIT_MEM) {
1581 emit_fop_mem(compiler, mem_flags, TMP_FREG2, src2, src2w);
1582 src2 = TMP_FREG2;
1583 }
1584
1585 return push_inst(compiler, (FCMP ^ inv_bits) | VN(src1) | VM(src2));
1586 }
1587
sljit_emit_fop1(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1588 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop1(struct sljit_compiler *compiler, sljit_s32 op,
1589 sljit_s32 dst, sljit_sw dstw,
1590 sljit_s32 src, sljit_sw srcw)
1591 {
1592 sljit_s32 dst_r, mem_flags = (op & SLJIT_32) ? INT_SIZE : WORD_SIZE;
1593 sljit_ins inv_bits;
1594
1595 CHECK_ERROR();
1596
1597 SLJIT_COMPILE_ASSERT((INT_SIZE ^ 0x1) == WORD_SIZE, must_be_one_bit_difference);
1598 SELECT_FOP1_OPERATION_WITH_CHECKS(compiler, op, dst, dstw, src, srcw);
1599
1600 inv_bits = (op & SLJIT_32) ? (1 << 22) : 0;
1601 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1602
1603 if (src & SLJIT_MEM) {
1604 emit_fop_mem(compiler, (GET_OPCODE(op) == SLJIT_CONV_F64_FROM_F32) ? (mem_flags ^ 0x1) : mem_flags, dst_r, src, srcw);
1605 src = dst_r;
1606 }
1607
1608 switch (GET_OPCODE(op)) {
1609 case SLJIT_MOV_F64:
1610 if (src != dst_r) {
1611 if (dst_r != TMP_FREG1)
1612 FAIL_IF(push_inst(compiler, (FMOV ^ inv_bits) | VD(dst_r) | VN(src)));
1613 else
1614 dst_r = src;
1615 }
1616 break;
1617 case SLJIT_NEG_F64:
1618 FAIL_IF(push_inst(compiler, (FNEG ^ inv_bits) | VD(dst_r) | VN(src)));
1619 break;
1620 case SLJIT_ABS_F64:
1621 FAIL_IF(push_inst(compiler, (FABS ^ inv_bits) | VD(dst_r) | VN(src)));
1622 break;
1623 case SLJIT_CONV_F64_FROM_F32:
1624 FAIL_IF(push_inst(compiler, FCVT | (sljit_ins)((op & SLJIT_32) ? (1 << 22) : (1 << 15)) | VD(dst_r) | VN(src)));
1625 break;
1626 }
1627
1628 if (dst & SLJIT_MEM)
1629 return emit_fop_mem(compiler, mem_flags | STORE, dst_r, dst, dstw);
1630 return SLJIT_SUCCESS;
1631 }
1632
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)1633 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop2(struct sljit_compiler *compiler, sljit_s32 op,
1634 sljit_s32 dst, sljit_sw dstw,
1635 sljit_s32 src1, sljit_sw src1w,
1636 sljit_s32 src2, sljit_sw src2w)
1637 {
1638 sljit_s32 dst_r, mem_flags = (op & SLJIT_32) ? INT_SIZE : WORD_SIZE;
1639 sljit_ins inv_bits = (op & SLJIT_32) ? (1 << 22) : 0;
1640
1641 CHECK_ERROR();
1642 CHECK(check_sljit_emit_fop2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1643 ADJUST_LOCAL_OFFSET(dst, dstw);
1644 ADJUST_LOCAL_OFFSET(src1, src1w);
1645 ADJUST_LOCAL_OFFSET(src2, src2w);
1646
1647 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1648 if (src1 & SLJIT_MEM) {
1649 emit_fop_mem(compiler, mem_flags, TMP_FREG1, src1, src1w);
1650 src1 = TMP_FREG1;
1651 }
1652 if (src2 & SLJIT_MEM) {
1653 emit_fop_mem(compiler, mem_flags, TMP_FREG2, src2, src2w);
1654 src2 = TMP_FREG2;
1655 }
1656
1657 switch (GET_OPCODE(op)) {
1658 case SLJIT_ADD_F64:
1659 FAIL_IF(push_inst(compiler, (FADD ^ inv_bits) | VD(dst_r) | VN(src1) | VM(src2)));
1660 break;
1661 case SLJIT_SUB_F64:
1662 FAIL_IF(push_inst(compiler, (FSUB ^ inv_bits) | VD(dst_r) | VN(src1) | VM(src2)));
1663 break;
1664 case SLJIT_MUL_F64:
1665 FAIL_IF(push_inst(compiler, (FMUL ^ inv_bits) | VD(dst_r) | VN(src1) | VM(src2)));
1666 break;
1667 case SLJIT_DIV_F64:
1668 FAIL_IF(push_inst(compiler, (FDIV ^ inv_bits) | VD(dst_r) | VN(src1) | VM(src2)));
1669 break;
1670 }
1671
1672 if (!(dst & SLJIT_MEM))
1673 return SLJIT_SUCCESS;
1674 return emit_fop_mem(compiler, mem_flags | STORE, TMP_FREG1, dst, dstw);
1675 }
1676
1677 /* --------------------------------------------------------------------- */
1678 /* Other instructions */
1679 /* --------------------------------------------------------------------- */
1680
sljit_emit_fast_enter(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw)1681 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
1682 {
1683 CHECK_ERROR();
1684 CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
1685 ADJUST_LOCAL_OFFSET(dst, dstw);
1686
1687 if (FAST_IS_REG(dst))
1688 return push_inst(compiler, ORR | RD(dst) | RN(TMP_ZERO) | RM(TMP_LR));
1689
1690 /* Memory. */
1691 return emit_op_mem(compiler, WORD_SIZE | STORE, TMP_LR, dst, dstw, TMP_REG1);
1692 }
1693
1694 /* --------------------------------------------------------------------- */
1695 /* Conditional instructions */
1696 /* --------------------------------------------------------------------- */
1697
get_cc(struct sljit_compiler * compiler,sljit_s32 type)1698 static sljit_ins get_cc(struct sljit_compiler *compiler, sljit_s32 type)
1699 {
1700 switch (type) {
1701 case SLJIT_EQUAL:
1702 case SLJIT_EQUAL_F64:
1703 return 0x1;
1704
1705 case SLJIT_NOT_EQUAL:
1706 case SLJIT_NOT_EQUAL_F64:
1707 return 0x0;
1708
1709 case SLJIT_CARRY:
1710 if (compiler->status_flags_state & SLJIT_CURRENT_FLAGS_ADD)
1711 return 0x3;
1712 /* fallthrough */
1713
1714 case SLJIT_LESS:
1715 case SLJIT_LESS_F64:
1716 return 0x2;
1717
1718 case SLJIT_NOT_CARRY:
1719 if (compiler->status_flags_state & SLJIT_CURRENT_FLAGS_ADD)
1720 return 0x2;
1721 /* fallthrough */
1722
1723 case SLJIT_GREATER_EQUAL:
1724 case SLJIT_GREATER_EQUAL_F64:
1725 return 0x3;
1726
1727 case SLJIT_GREATER:
1728 case SLJIT_GREATER_F64:
1729 return 0x9;
1730
1731 case SLJIT_LESS_EQUAL:
1732 case SLJIT_LESS_EQUAL_F64:
1733 return 0x8;
1734
1735 case SLJIT_SIG_LESS:
1736 return 0xa;
1737
1738 case SLJIT_SIG_GREATER_EQUAL:
1739 return 0xb;
1740
1741 case SLJIT_SIG_GREATER:
1742 return 0xd;
1743
1744 case SLJIT_SIG_LESS_EQUAL:
1745 return 0xc;
1746
1747 case SLJIT_OVERFLOW:
1748 if (!(compiler->status_flags_state & (SLJIT_CURRENT_FLAGS_ADD | SLJIT_CURRENT_FLAGS_SUB)))
1749 return 0x0;
1750 /* fallthrough */
1751
1752 case SLJIT_UNORDERED_F64:
1753 return 0x7;
1754
1755 case SLJIT_NOT_OVERFLOW:
1756 if (!(compiler->status_flags_state & (SLJIT_CURRENT_FLAGS_ADD | SLJIT_CURRENT_FLAGS_SUB)))
1757 return 0x1;
1758 /* fallthrough */
1759
1760 case SLJIT_ORDERED_F64:
1761 return 0x6;
1762
1763 default:
1764 SLJIT_UNREACHABLE();
1765 return 0xe;
1766 }
1767 }
1768
sljit_emit_label(struct sljit_compiler * compiler)1769 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler)
1770 {
1771 struct sljit_label *label;
1772
1773 CHECK_ERROR_PTR();
1774 CHECK_PTR(check_sljit_emit_label(compiler));
1775
1776 if (compiler->last_label && compiler->last_label->size == compiler->size)
1777 return compiler->last_label;
1778
1779 label = (struct sljit_label*)ensure_abuf(compiler, sizeof(struct sljit_label));
1780 PTR_FAIL_IF(!label);
1781 set_label(label, compiler);
1782 return label;
1783 }
1784
sljit_emit_jump(struct sljit_compiler * compiler,sljit_s32 type)1785 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, sljit_s32 type)
1786 {
1787 struct sljit_jump *jump;
1788
1789 CHECK_ERROR_PTR();
1790 CHECK_PTR(check_sljit_emit_jump(compiler, type));
1791
1792 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
1793 PTR_FAIL_IF(!jump);
1794 set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
1795 type &= 0xff;
1796
1797 if (type < SLJIT_JUMP) {
1798 jump->flags |= IS_COND;
1799 PTR_FAIL_IF(push_inst(compiler, B_CC | (6 << 5) | get_cc(compiler, type)));
1800 }
1801 else if (type >= SLJIT_FAST_CALL)
1802 jump->flags |= IS_BL;
1803
1804 PTR_FAIL_IF(emit_imm64_const(compiler, TMP_REG1, 0));
1805 jump->addr = compiler->size;
1806 PTR_FAIL_IF(push_inst(compiler, ((type >= SLJIT_FAST_CALL) ? BLR : BR) | RN(TMP_REG1)));
1807
1808 return jump;
1809 }
1810
sljit_emit_call(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types)1811 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
1812 sljit_s32 arg_types)
1813 {
1814 SLJIT_UNUSED_ARG(arg_types);
1815 CHECK_ERROR_PTR();
1816 CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
1817
1818 if (type & SLJIT_CALL_RETURN) {
1819 PTR_FAIL_IF(emit_stack_frame_release(compiler));
1820 type = SLJIT_JUMP | (type & SLJIT_REWRITABLE_JUMP);
1821 }
1822
1823 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
1824 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
1825 compiler->skip_checks = 1;
1826 #endif
1827
1828 return sljit_emit_jump(compiler, type);
1829 }
1830
emit_cmp_to0(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 src,sljit_sw srcw)1831 static SLJIT_INLINE struct sljit_jump* emit_cmp_to0(struct sljit_compiler *compiler, sljit_s32 type,
1832 sljit_s32 src, sljit_sw srcw)
1833 {
1834 struct sljit_jump *jump;
1835 sljit_ins inv_bits = (type & SLJIT_32) ? W_OP : 0;
1836
1837 SLJIT_ASSERT((type & 0xff) == SLJIT_EQUAL || (type & 0xff) == SLJIT_NOT_EQUAL);
1838 ADJUST_LOCAL_OFFSET(src, srcw);
1839
1840 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
1841 PTR_FAIL_IF(!jump);
1842 set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
1843 jump->flags |= IS_CBZ | IS_COND;
1844
1845 if (src & SLJIT_MEM) {
1846 PTR_FAIL_IF(emit_op_mem(compiler, inv_bits ? INT_SIZE : WORD_SIZE, TMP_REG1, src, srcw, TMP_REG1));
1847 src = TMP_REG1;
1848 }
1849 else if (src & SLJIT_IMM) {
1850 PTR_FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
1851 src = TMP_REG1;
1852 }
1853
1854 SLJIT_ASSERT(FAST_IS_REG(src));
1855
1856 if ((type & 0xff) == SLJIT_EQUAL)
1857 inv_bits |= 1 << 24;
1858
1859 PTR_FAIL_IF(push_inst(compiler, (CBZ ^ inv_bits) | (6 << 5) | RT(src)));
1860 PTR_FAIL_IF(emit_imm64_const(compiler, TMP_REG1, 0));
1861 jump->addr = compiler->size;
1862 PTR_FAIL_IF(push_inst(compiler, BR | RN(TMP_REG1)));
1863 return jump;
1864 }
1865
sljit_emit_ijump(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 src,sljit_sw srcw)1866 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_ijump(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 src, sljit_sw srcw)
1867 {
1868 struct sljit_jump *jump;
1869
1870 CHECK_ERROR();
1871 CHECK(check_sljit_emit_ijump(compiler, type, src, srcw));
1872 ADJUST_LOCAL_OFFSET(src, srcw);
1873
1874 if (!(src & SLJIT_IMM)) {
1875 if (src & SLJIT_MEM) {
1876 FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, src, srcw, TMP_REG1));
1877 src = TMP_REG1;
1878 }
1879 return push_inst(compiler, ((type >= SLJIT_FAST_CALL) ? BLR : BR) | RN(src));
1880 }
1881
1882 /* These jumps are converted to jump/call instructions when possible. */
1883 jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
1884 FAIL_IF(!jump);
1885 set_jump(jump, compiler, JUMP_ADDR | ((type >= SLJIT_FAST_CALL) ? IS_BL : 0));
1886 jump->u.target = (sljit_uw)srcw;
1887
1888 FAIL_IF(emit_imm64_const(compiler, TMP_REG1, 0));
1889 jump->addr = compiler->size;
1890 return push_inst(compiler, ((type >= SLJIT_FAST_CALL) ? BLR : BR) | RN(TMP_REG1));
1891 }
1892
sljit_emit_icall(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types,sljit_s32 src,sljit_sw srcw)1893 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
1894 sljit_s32 arg_types,
1895 sljit_s32 src, sljit_sw srcw)
1896 {
1897 SLJIT_UNUSED_ARG(arg_types);
1898 CHECK_ERROR();
1899 CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
1900 ADJUST_LOCAL_OFFSET(src, srcw);
1901
1902 if (src & SLJIT_MEM) {
1903 FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, src, srcw, TMP_REG1));
1904 src = TMP_REG1;
1905 }
1906
1907 if (type & SLJIT_CALL_RETURN) {
1908 if (src >= SLJIT_FIRST_SAVED_REG && src <= SLJIT_S0) {
1909 FAIL_IF(push_inst(compiler, ORR | RD(TMP_REG1) | RN(TMP_ZERO) | RM(src)));
1910 src = TMP_REG1;
1911 }
1912
1913 FAIL_IF(emit_stack_frame_release(compiler));
1914 type = SLJIT_JUMP;
1915 }
1916
1917 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
1918 || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
1919 compiler->skip_checks = 1;
1920 #endif
1921
1922 return sljit_emit_ijump(compiler, type, src, srcw);
1923 }
1924
sljit_emit_op_flags(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 type)1925 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_flags(struct sljit_compiler *compiler, sljit_s32 op,
1926 sljit_s32 dst, sljit_sw dstw,
1927 sljit_s32 type)
1928 {
1929 sljit_s32 dst_r, src_r, flags, mem_flags;
1930 sljit_ins cc;
1931
1932 CHECK_ERROR();
1933 CHECK(check_sljit_emit_op_flags(compiler, op, dst, dstw, type));
1934 ADJUST_LOCAL_OFFSET(dst, dstw);
1935
1936 cc = get_cc(compiler, type & 0xff);
1937 dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
1938
1939 if (GET_OPCODE(op) < SLJIT_ADD) {
1940 FAIL_IF(push_inst(compiler, CSINC | (cc << 12) | RD(dst_r) | RN(TMP_ZERO) | RM(TMP_ZERO)));
1941
1942 if (dst_r == TMP_REG1) {
1943 mem_flags = (GET_OPCODE(op) == SLJIT_MOV ? WORD_SIZE : INT_SIZE) | STORE;
1944 return emit_op_mem(compiler, mem_flags, TMP_REG1, dst, dstw, TMP_REG2);
1945 }
1946
1947 return SLJIT_SUCCESS;
1948 }
1949
1950 flags = HAS_FLAGS(op) ? SET_FLAGS : 0;
1951 mem_flags = WORD_SIZE;
1952
1953 if (op & SLJIT_32) {
1954 flags |= INT_OP;
1955 mem_flags = INT_SIZE;
1956 }
1957
1958 src_r = dst;
1959
1960 if (dst & SLJIT_MEM) {
1961 FAIL_IF(emit_op_mem(compiler, mem_flags, TMP_REG1, dst, dstw, TMP_REG1));
1962 src_r = TMP_REG1;
1963 }
1964
1965 FAIL_IF(push_inst(compiler, CSINC | (cc << 12) | RD(TMP_REG2) | RN(TMP_ZERO) | RM(TMP_ZERO)));
1966 emit_op_imm(compiler, flags | GET_OPCODE(op), dst_r, src_r, TMP_REG2);
1967
1968 if (dst & SLJIT_MEM)
1969 return emit_op_mem(compiler, mem_flags | STORE, TMP_REG1, dst, dstw, TMP_REG2);
1970 return SLJIT_SUCCESS;
1971 }
1972
sljit_emit_cmov(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 dst_reg,sljit_s32 src,sljit_sw srcw)1973 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_cmov(struct sljit_compiler *compiler, sljit_s32 type,
1974 sljit_s32 dst_reg,
1975 sljit_s32 src, sljit_sw srcw)
1976 {
1977 sljit_ins inv_bits = (dst_reg & SLJIT_32) ? W_OP : 0;
1978 sljit_ins cc;
1979
1980 CHECK_ERROR();
1981 CHECK(check_sljit_emit_cmov(compiler, type, dst_reg, src, srcw));
1982
1983 if (SLJIT_UNLIKELY(src & SLJIT_IMM)) {
1984 if (dst_reg & SLJIT_32)
1985 srcw = (sljit_s32)srcw;
1986 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
1987 src = TMP_REG1;
1988 srcw = 0;
1989 }
1990
1991 cc = get_cc(compiler, type & 0xff);
1992 dst_reg &= ~SLJIT_32;
1993
1994 return push_inst(compiler, (CSEL ^ inv_bits) | (cc << 12) | RD(dst_reg) | RN(dst_reg) | RM(src));
1995 }
1996
sljit_emit_mem(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 reg,sljit_s32 mem,sljit_sw memw)1997 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_mem(struct sljit_compiler *compiler, sljit_s32 type,
1998 sljit_s32 reg,
1999 sljit_s32 mem, sljit_sw memw)
2000 {
2001 sljit_u32 sign = 0, inst;
2002
2003 CHECK_ERROR();
2004 CHECK(check_sljit_emit_mem(compiler, type, reg, mem, memw));
2005
2006 if ((mem & OFFS_REG_MASK) || (memw > 255 || memw < -256))
2007 return SLJIT_ERR_UNSUPPORTED;
2008
2009 if (type & SLJIT_MEM_SUPP)
2010 return SLJIT_SUCCESS;
2011
2012 switch (type & 0xff) {
2013 case SLJIT_MOV:
2014 case SLJIT_MOV_P:
2015 inst = STURBI | (MEM_SIZE_SHIFT(WORD_SIZE) << 30) | 0x400;
2016 break;
2017 case SLJIT_MOV_S8:
2018 sign = 1;
2019 /* fallthrough */
2020 case SLJIT_MOV_U8:
2021 inst = STURBI | (MEM_SIZE_SHIFT(BYTE_SIZE) << 30) | 0x400;
2022 break;
2023 case SLJIT_MOV_S16:
2024 sign = 1;
2025 /* fallthrough */
2026 case SLJIT_MOV_U16:
2027 inst = STURBI | (MEM_SIZE_SHIFT(HALF_SIZE) << 30) | 0x400;
2028 break;
2029 case SLJIT_MOV_S32:
2030 sign = 1;
2031 /* fallthrough */
2032 case SLJIT_MOV_U32:
2033 case SLJIT_MOV32:
2034 inst = STURBI | (MEM_SIZE_SHIFT(INT_SIZE) << 30) | 0x400;
2035 break;
2036 default:
2037 SLJIT_UNREACHABLE();
2038 inst = STURBI | (MEM_SIZE_SHIFT(WORD_SIZE) << 30) | 0x400;
2039 break;
2040 }
2041
2042 if (!(type & SLJIT_MEM_STORE))
2043 inst |= sign ? 0x00800000 : 0x00400000;
2044
2045 if (type & SLJIT_MEM_PRE)
2046 inst |= 0x800;
2047
2048 return push_inst(compiler, inst | RT(reg) | RN(mem & REG_MASK) | (sljit_ins)((memw & 0x1ff) << 12));
2049 }
2050
sljit_emit_fmem(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 freg,sljit_s32 mem,sljit_sw memw)2051 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fmem(struct sljit_compiler *compiler, sljit_s32 type,
2052 sljit_s32 freg,
2053 sljit_s32 mem, sljit_sw memw)
2054 {
2055 sljit_u32 inst;
2056
2057 CHECK_ERROR();
2058 CHECK(check_sljit_emit_fmem(compiler, type, freg, mem, memw));
2059
2060 if ((mem & OFFS_REG_MASK) || (memw > 255 || memw < -256))
2061 return SLJIT_ERR_UNSUPPORTED;
2062
2063 if (type & SLJIT_MEM_SUPP)
2064 return SLJIT_SUCCESS;
2065
2066 inst = STUR_FI | 0x80000400;
2067
2068 if (!(type & SLJIT_32))
2069 inst |= 0x40000000;
2070
2071 if (!(type & SLJIT_MEM_STORE))
2072 inst |= 0x00400000;
2073
2074 if (type & SLJIT_MEM_PRE)
2075 inst |= 0x800;
2076
2077 return push_inst(compiler, inst | VT(freg) | RN(mem & REG_MASK) | (sljit_ins)((memw & 0x1ff) << 12));
2078 }
2079
sljit_get_local_base(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw,sljit_sw offset)2080 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_local_base(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw, sljit_sw offset)
2081 {
2082 sljit_s32 dst_reg;
2083 sljit_ins ins;
2084
2085 CHECK_ERROR();
2086 CHECK(check_sljit_get_local_base(compiler, dst, dstw, offset));
2087 ADJUST_LOCAL_OFFSET(SLJIT_MEM1(SLJIT_SP), offset);
2088
2089 dst_reg = FAST_IS_REG(dst) ? dst : TMP_REG1;
2090
2091 /* Not all instruction forms support accessing SP register. */
2092 if (offset <= 0xffffff && offset >= -0xffffff) {
2093 ins = ADDI;
2094 if (offset < 0) {
2095 offset = -offset;
2096 ins = SUBI;
2097 }
2098
2099 if (offset <= 0xfff)
2100 FAIL_IF(push_inst(compiler, ins | RD(dst_reg) | RN(SLJIT_SP) | (sljit_ins)(offset << 10)));
2101 else {
2102 FAIL_IF(push_inst(compiler, ins | RD(dst_reg) | RN(SLJIT_SP) | (sljit_ins)((offset & 0xfff000) >> (12 - 10)) | (1 << 22)));
2103
2104 offset &= 0xfff;
2105 if (offset != 0)
2106 FAIL_IF(push_inst(compiler, ins | RD(dst_reg) | RN(dst_reg) | (sljit_ins)(offset << 10)));
2107 }
2108 }
2109 else {
2110 FAIL_IF(load_immediate (compiler, dst_reg, offset));
2111 /* Add extended register form. */
2112 FAIL_IF(push_inst(compiler, ADDE | (0x3 << 13) | RD(dst_reg) | RN(SLJIT_SP) | RM(dst_reg)));
2113 }
2114
2115 if (SLJIT_UNLIKELY(dst & SLJIT_MEM))
2116 return emit_op_mem(compiler, WORD_SIZE | STORE, dst_reg, dst, dstw, TMP_REG1);
2117 return SLJIT_SUCCESS;
2118 }
2119
sljit_emit_const(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw,sljit_sw init_value)2120 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw, sljit_sw init_value)
2121 {
2122 struct sljit_const *const_;
2123 sljit_s32 dst_r;
2124
2125 CHECK_ERROR_PTR();
2126 CHECK_PTR(check_sljit_emit_const(compiler, dst, dstw, init_value));
2127 ADJUST_LOCAL_OFFSET(dst, dstw);
2128
2129 const_ = (struct sljit_const*)ensure_abuf(compiler, sizeof(struct sljit_const));
2130 PTR_FAIL_IF(!const_);
2131 set_const(const_, compiler);
2132
2133 dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
2134 PTR_FAIL_IF(emit_imm64_const(compiler, dst_r, (sljit_uw)init_value));
2135
2136 if (dst & SLJIT_MEM)
2137 PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE | STORE, dst_r, dst, dstw, TMP_REG2));
2138 return const_;
2139 }
2140
sljit_emit_put_label(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw)2141 SLJIT_API_FUNC_ATTRIBUTE struct sljit_put_label* sljit_emit_put_label(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
2142 {
2143 struct sljit_put_label *put_label;
2144 sljit_s32 dst_r;
2145
2146 CHECK_ERROR_PTR();
2147 CHECK_PTR(check_sljit_emit_put_label(compiler, dst, dstw));
2148 ADJUST_LOCAL_OFFSET(dst, dstw);
2149
2150 dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
2151 PTR_FAIL_IF(emit_imm64_const(compiler, dst_r, 0));
2152
2153 put_label = (struct sljit_put_label*)ensure_abuf(compiler, sizeof(struct sljit_put_label));
2154 PTR_FAIL_IF(!put_label);
2155 set_put_label(put_label, compiler, 1);
2156
2157 if (dst & SLJIT_MEM)
2158 PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE | STORE, dst_r, dst, dstw, TMP_REG2));
2159
2160 return put_label;
2161 }
2162
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_target,sljit_sw executable_offset)2163 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
2164 {
2165 sljit_ins* inst = (sljit_ins*)addr;
2166 sljit_u32 dst;
2167 SLJIT_UNUSED_ARG(executable_offset);
2168
2169 SLJIT_UPDATE_WX_FLAGS(inst, inst + 4, 0);
2170
2171 dst = inst[0] & 0x1f;
2172 SLJIT_ASSERT((inst[0] & 0xffe00000) == MOVZ && (inst[1] & 0xffe00000) == (MOVK | (1 << 21)));
2173 inst[0] = MOVZ | dst | (((sljit_u32)new_target & 0xffff) << 5);
2174 inst[1] = MOVK | dst | (((sljit_u32)(new_target >> 16) & 0xffff) << 5) | (1 << 21);
2175 inst[2] = MOVK | dst | (((sljit_u32)(new_target >> 32) & 0xffff) << 5) | (2 << 21);
2176 inst[3] = MOVK | dst | ((sljit_u32)(new_target >> 48) << 5) | (3 << 21);
2177
2178 SLJIT_UPDATE_WX_FLAGS(inst, inst + 4, 1);
2179 inst = (sljit_ins *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
2180 SLJIT_CACHE_FLUSH(inst, inst + 4);
2181 }
2182
sljit_set_const(sljit_uw addr,sljit_sw new_constant,sljit_sw executable_offset)2183 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
2184 {
2185 sljit_set_jump_addr(addr, (sljit_uw)new_constant, executable_offset);
2186 }
2187
