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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 #ifdef __SOFTFP__
30 	return "ARM-Thumb2" SLJIT_CPUINFO " ABI:softfp";
31 #else
32 	return "ARM-Thumb2" SLJIT_CPUINFO " ABI:hardfp";
33 #endif
34 }
35 
36 /* Length of an instruction word. */
37 typedef sljit_u32 sljit_ins;
38 
39 /* Last register + 1. */
40 #define TMP_REG1	(SLJIT_NUMBER_OF_REGISTERS + 2)
41 #define TMP_REG2	(SLJIT_NUMBER_OF_REGISTERS + 3)
42 #define TMP_PC		(SLJIT_NUMBER_OF_REGISTERS + 4)
43 
44 #define TMP_FREG1	(SLJIT_NUMBER_OF_FLOAT_REGISTERS + 1)
45 #define TMP_FREG2	(SLJIT_NUMBER_OF_FLOAT_REGISTERS + 2)
46 
47 /* See sljit_emit_enter and sljit_emit_op0 if you want to change them. */
48 static const sljit_u8 reg_map[SLJIT_NUMBER_OF_REGISTERS + 5] = {
49 	0, 0, 1, 2, 3, 11, 10, 9, 8, 7, 6, 5, 4, 13, 12, 14, 15
50 };
51 
52 static const sljit_u8 freg_map[SLJIT_NUMBER_OF_FLOAT_REGISTERS + 3] = {
53 	0, 0, 1, 2, 3, 4, 5, 6, 7
54 };
55 
56 #define COPY_BITS(src, from, to, bits) \
57 	((from >= to ? (src >> (from - to)) : (src << (to - from))) & (((1 << bits) - 1) << to))
58 
59 /* Thumb16 encodings. */
60 #define RD3(rd) (reg_map[rd])
61 #define RN3(rn) (reg_map[rn] << 3)
62 #define RM3(rm) (reg_map[rm] << 6)
63 #define RDN3(rdn) (reg_map[rdn] << 8)
64 #define IMM3(imm) (imm << 6)
65 #define IMM8(imm) (imm)
66 
67 /* Thumb16 helpers. */
68 #define SET_REGS44(rd, rn) \
69 	((reg_map[rn] << 3) | (reg_map[rd] & 0x7) | ((reg_map[rd] & 0x8) << 4))
70 #define IS_2_LO_REGS(reg1, reg2) \
71 	(reg_map[reg1] <= 7 && reg_map[reg2] <= 7)
72 #define IS_3_LO_REGS(reg1, reg2, reg3) \
73 	(reg_map[reg1] <= 7 && reg_map[reg2] <= 7 && reg_map[reg3] <= 7)
74 
75 /* Thumb32 encodings. */
76 #define RD4(rd) (reg_map[rd] << 8)
77 #define RN4(rn) (reg_map[rn] << 16)
78 #define RM4(rm) (reg_map[rm])
79 #define RT4(rt) (reg_map[rt] << 12)
80 #define DD4(dd) (freg_map[dd] << 12)
81 #define DN4(dn) (freg_map[dn] << 16)
82 #define DM4(dm) (freg_map[dm])
83 #define IMM5(imm) \
84 	(COPY_BITS(imm, 2, 12, 3) | ((imm & 0x3) << 6))
85 #define IMM12(imm) \
86 	(COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff))
87 
88 /* --------------------------------------------------------------------- */
89 /*  Instrucion forms                                                     */
90 /* --------------------------------------------------------------------- */
91 
92 /* dot '.' changed to _
93    I immediate form (possibly followed by number of immediate bits). */
94 #define ADCI		0xf1400000
95 #define ADCS		0x4140
96 #define ADC_W		0xeb400000
97 #define ADD		0x4400
98 #define ADDS		0x1800
99 #define ADDSI3		0x1c00
100 #define ADDSI8		0x3000
101 #define ADD_W		0xeb000000
102 #define ADDWI		0xf2000000
103 #define ADD_SP		0xb000
104 #define ADD_W		0xeb000000
105 #define ADD_WI		0xf1000000
106 #define ANDI		0xf0000000
107 #define ANDS		0x4000
108 #define AND_W		0xea000000
109 #define ASRS		0x4100
110 #define ASRSI		0x1000
111 #define ASR_W		0xfa40f000
112 #define ASR_WI		0xea4f0020
113 #define BCC		0xd000
114 #define BICI		0xf0200000
115 #define BKPT		0xbe00
116 #define BLX		0x4780
117 #define BX		0x4700
118 #define CLZ		0xfab0f080
119 #define CMNI_W		0xf1100f00
120 #define CMP		0x4280
121 #define CMPI		0x2800
122 #define CMPI_W		0xf1b00f00
123 #define CMP_X		0x4500
124 #define CMP_W		0xebb00f00
125 #define EORI		0xf0800000
126 #define EORS		0x4040
127 #define EOR_W		0xea800000
128 #define IT		0xbf00
129 #define LDRI		0xf8500800
130 #define LSLS		0x4080
131 #define LSLSI		0x0000
132 #define LSL_W		0xfa00f000
133 #define LSL_WI		0xea4f0000
134 #define LSRS		0x40c0
135 #define LSRSI		0x0800
136 #define LSR_W		0xfa20f000
137 #define LSR_WI		0xea4f0010
138 #define MOV		0x4600
139 #define MOVS		0x0000
140 #define MOVSI		0x2000
141 #define MOVT		0xf2c00000
142 #define MOVW		0xf2400000
143 #define MOV_W		0xea4f0000
144 #define MOV_WI		0xf04f0000
145 #define MUL		0xfb00f000
146 #define MVNS		0x43c0
147 #define MVN_W		0xea6f0000
148 #define MVN_WI		0xf06f0000
149 #define NOP		0xbf00
150 #define ORNI		0xf0600000
151 #define ORRI		0xf0400000
152 #define ORRS		0x4300
153 #define ORR_W		0xea400000
154 #define POP		0xbc00
155 #define POP_W		0xe8bd0000
156 #define PUSH		0xb400
157 #define PUSH_W		0xe92d0000
158 #define RSB_WI		0xf1c00000
159 #define RSBSI		0x4240
160 #define SBCI		0xf1600000
161 #define SBCS		0x4180
162 #define SBC_W		0xeb600000
163 #define SDIV		0xfb90f0f0
164 #define SMULL		0xfb800000
165 #define STR_SP		0x9000
166 #define SUBS		0x1a00
167 #define SUBSI3		0x1e00
168 #define SUBSI8		0x3800
169 #define SUB_W		0xeba00000
170 #define SUBWI		0xf2a00000
171 #define SUB_SP		0xb080
172 #define SUB_WI		0xf1a00000
173 #define SXTB		0xb240
174 #define SXTB_W		0xfa4ff080
175 #define SXTH		0xb200
176 #define SXTH_W		0xfa0ff080
177 #define TST		0x4200
178 #define UDIV		0xfbb0f0f0
179 #define UMULL		0xfba00000
180 #define UXTB		0xb2c0
181 #define UXTB_W		0xfa5ff080
182 #define UXTH		0xb280
183 #define UXTH_W		0xfa1ff080
184 #define VABS_F32	0xeeb00ac0
185 #define VADD_F32	0xee300a00
186 #define VCMP_F32	0xeeb40a40
187 #define VCVT_F32_S32	0xeeb80ac0
188 #define VCVT_F64_F32	0xeeb70ac0
189 #define VCVT_S32_F32	0xeebd0ac0
190 #define VDIV_F32	0xee800a00
191 #define VMOV_F32	0xeeb00a40
192 #define VMOV		0xee000a10
193 #define VMOV2		0xec400a10
194 #define VMRS		0xeef1fa10
195 #define VMUL_F32	0xee200a00
196 #define VNEG_F32	0xeeb10a40
197 #define VSTR_F32	0xed000a00
198 #define VSUB_F32	0xee300a40
199 
push_inst16(struct sljit_compiler * compiler,sljit_ins inst)200 static sljit_s32 push_inst16(struct sljit_compiler *compiler, sljit_ins inst)
201 {
202 	sljit_u16 *ptr;
203 	SLJIT_ASSERT(!(inst & 0xffff0000));
204 
205 	ptr = (sljit_u16*)ensure_buf(compiler, sizeof(sljit_u16));
206 	FAIL_IF(!ptr);
207 	*ptr = inst;
208 	compiler->size++;
209 	return SLJIT_SUCCESS;
210 }
211 
push_inst32(struct sljit_compiler * compiler,sljit_ins inst)212 static sljit_s32 push_inst32(struct sljit_compiler *compiler, sljit_ins inst)
213 {
214 	sljit_u16 *ptr = (sljit_u16*)ensure_buf(compiler, sizeof(sljit_ins));
215 	FAIL_IF(!ptr);
216 	*ptr++ = inst >> 16;
217 	*ptr = inst;
218 	compiler->size += 2;
219 	return SLJIT_SUCCESS;
220 }
221 
emit_imm32_const(struct sljit_compiler * compiler,sljit_s32 dst,sljit_uw imm)222 static SLJIT_INLINE sljit_s32 emit_imm32_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_uw imm)
223 {
224 	FAIL_IF(push_inst32(compiler, MOVW | RD4(dst)
225 		| COPY_BITS(imm, 12, 16, 4) | COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff)));
226 	return push_inst32(compiler, MOVT | RD4(dst)
227 		| COPY_BITS(imm, 12 + 16, 16, 4) | COPY_BITS(imm, 11 + 16, 26, 1) | COPY_BITS(imm, 8 + 16, 12, 3) | ((imm & 0xff0000) >> 16));
228 }
229 
modify_imm32_const(sljit_u16 * inst,sljit_uw new_imm)230 static SLJIT_INLINE void modify_imm32_const(sljit_u16 *inst, sljit_uw new_imm)
231 {
232 	sljit_s32 dst = inst[1] & 0x0f00;
233 	SLJIT_ASSERT(((inst[0] & 0xfbf0) == (MOVW >> 16)) && ((inst[2] & 0xfbf0) == (MOVT >> 16)) && dst == (inst[3] & 0x0f00));
234 	inst[0] = (MOVW >> 16) | COPY_BITS(new_imm, 12, 0, 4) | COPY_BITS(new_imm, 11, 10, 1);
235 	inst[1] = dst | COPY_BITS(new_imm, 8, 12, 3) | (new_imm & 0xff);
236 	inst[2] = (MOVT >> 16) | COPY_BITS(new_imm, 12 + 16, 0, 4) | COPY_BITS(new_imm, 11 + 16, 10, 1);
237 	inst[3] = dst | COPY_BITS(new_imm, 8 + 16, 12, 3) | ((new_imm & 0xff0000) >> 16);
238 }
239 
detect_jump_type(struct sljit_jump * jump,sljit_u16 * code_ptr,sljit_u16 * code,sljit_sw executable_offset)240 static SLJIT_INLINE sljit_s32 detect_jump_type(struct sljit_jump *jump, sljit_u16 *code_ptr, sljit_u16 *code, sljit_sw executable_offset)
241 {
242 	sljit_sw diff;
243 
244 	if (jump->flags & SLJIT_REWRITABLE_JUMP)
245 		return 0;
246 
247 	if (jump->flags & JUMP_ADDR) {
248 		/* Branch to ARM code is not optimized yet. */
249 		if (!(jump->u.target & 0x1))
250 			return 0;
251 		diff = ((sljit_sw)jump->u.target - (sljit_sw)(code_ptr + 2) - executable_offset) >> 1;
252 	}
253 	else {
254 		SLJIT_ASSERT(jump->flags & JUMP_LABEL);
255 		diff = ((sljit_sw)(code + jump->u.label->size) - (sljit_sw)(code_ptr + 2)) >> 1;
256 	}
257 
258 	if (jump->flags & IS_COND) {
259 		SLJIT_ASSERT(!(jump->flags & IS_BL));
260 		if (diff <= 127 && diff >= -128) {
261 			jump->flags |= PATCH_TYPE1;
262 			return 5;
263 		}
264 		if (diff <= 524287 && diff >= -524288) {
265 			jump->flags |= PATCH_TYPE2;
266 			return 4;
267 		}
268 		/* +1 comes from the prefix IT instruction. */
269 		diff--;
270 		if (diff <= 8388607 && diff >= -8388608) {
271 			jump->flags |= PATCH_TYPE3;
272 			return 3;
273 		}
274 	}
275 	else if (jump->flags & IS_BL) {
276 		if (diff <= 8388607 && diff >= -8388608) {
277 			jump->flags |= PATCH_BL;
278 			return 3;
279 		}
280 	}
281 	else {
282 		if (diff <= 1023 && diff >= -1024) {
283 			jump->flags |= PATCH_TYPE4;
284 			return 4;
285 		}
286 		if (diff <= 8388607 && diff >= -8388608) {
287 			jump->flags |= PATCH_TYPE5;
288 			return 3;
289 		}
290 	}
291 
292 	return 0;
293 }
294 
set_jump_instruction(struct sljit_jump * jump,sljit_sw executable_offset)295 static SLJIT_INLINE void set_jump_instruction(struct sljit_jump *jump, sljit_sw executable_offset)
296 {
297 	sljit_s32 type = (jump->flags >> 4) & 0xf;
298 	sljit_sw diff;
299 	sljit_u16 *jump_inst;
300 	sljit_s32 s, j1, j2;
301 
302 	if (SLJIT_UNLIKELY(type == 0)) {
303 		modify_imm32_const((sljit_u16*)jump->addr, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target);
304 		return;
305 	}
306 
307 	if (jump->flags & JUMP_ADDR) {
308 		SLJIT_ASSERT(jump->u.target & 0x1);
309 		diff = ((sljit_sw)jump->u.target - (sljit_sw)(jump->addr + sizeof(sljit_u32)) - executable_offset) >> 1;
310 	}
311 	else {
312 		SLJIT_ASSERT(jump->u.label->addr & 0x1);
313 		diff = ((sljit_sw)(jump->u.label->addr) - (sljit_sw)(jump->addr + sizeof(sljit_u32)) - executable_offset) >> 1;
314 	}
315 	jump_inst = (sljit_u16*)jump->addr;
316 
317 	switch (type) {
318 	case 1:
319 		/* Encoding T1 of 'B' instruction */
320 		SLJIT_ASSERT(diff <= 127 && diff >= -128 && (jump->flags & IS_COND));
321 		jump_inst[0] = 0xd000 | (jump->flags & 0xf00) | (diff & 0xff);
322 		return;
323 	case 2:
324 		/* Encoding T3 of 'B' instruction */
325 		SLJIT_ASSERT(diff <= 524287 && diff >= -524288 && (jump->flags & IS_COND));
326 		jump_inst[0] = 0xf000 | COPY_BITS(jump->flags, 8, 6, 4) | COPY_BITS(diff, 11, 0, 6) | COPY_BITS(diff, 19, 10, 1);
327 		jump_inst[1] = 0x8000 | COPY_BITS(diff, 17, 13, 1) | COPY_BITS(diff, 18, 11, 1) | (diff & 0x7ff);
328 		return;
329 	case 3:
330 		SLJIT_ASSERT(jump->flags & IS_COND);
331 		*jump_inst++ = IT | ((jump->flags >> 4) & 0xf0) | 0x8;
332 		diff--;
333 		type = 5;
334 		break;
335 	case 4:
336 		/* Encoding T2 of 'B' instruction */
337 		SLJIT_ASSERT(diff <= 1023 && diff >= -1024 && !(jump->flags & IS_COND));
338 		jump_inst[0] = 0xe000 | (diff & 0x7ff);
339 		return;
340 	}
341 
342 	SLJIT_ASSERT(diff <= 8388607 && diff >= -8388608);
343 
344 	/* Really complex instruction form for branches. */
345 	s = (diff >> 23) & 0x1;
346 	j1 = (~(diff >> 22) ^ s) & 0x1;
347 	j2 = (~(diff >> 21) ^ s) & 0x1;
348 	jump_inst[0] = 0xf000 | (s << 10) | COPY_BITS(diff, 11, 0, 10);
349 	jump_inst[1] = (j1 << 13) | (j2 << 11) | (diff & 0x7ff);
350 
351 	/* The others have a common form. */
352 	if (type == 5) /* Encoding T4 of 'B' instruction */
353 		jump_inst[1] |= 0x9000;
354 	else if (type == 6) /* Encoding T1 of 'BL' instruction */
355 		jump_inst[1] |= 0xd000;
356 	else
357 		SLJIT_UNREACHABLE();
358 }
359 
sljit_generate_code(struct sljit_compiler * compiler)360 SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler)
361 {
362 	struct sljit_memory_fragment *buf;
363 	sljit_u16 *code;
364 	sljit_u16 *code_ptr;
365 	sljit_u16 *buf_ptr;
366 	sljit_u16 *buf_end;
367 	sljit_uw half_count;
368 	sljit_sw executable_offset;
369 
370 	struct sljit_label *label;
371 	struct sljit_jump *jump;
372 	struct sljit_const *const_;
373 
374 	CHECK_ERROR_PTR();
375 	CHECK_PTR(check_sljit_generate_code(compiler));
376 	reverse_buf(compiler);
377 
378 	code = (sljit_u16*)SLJIT_MALLOC_EXEC(compiler->size * sizeof(sljit_u16));
379 	PTR_FAIL_WITH_EXEC_IF(code);
380 	buf = compiler->buf;
381 
382 	code_ptr = code;
383 	half_count = 0;
384 	executable_offset = SLJIT_EXEC_OFFSET(code);
385 
386 	label = compiler->labels;
387 	jump = compiler->jumps;
388 	const_ = compiler->consts;
389 
390 	do {
391 		buf_ptr = (sljit_u16*)buf->memory;
392 		buf_end = buf_ptr + (buf->used_size >> 1);
393 		do {
394 			*code_ptr = *buf_ptr++;
395 			/* These structures are ordered by their address. */
396 			SLJIT_ASSERT(!label || label->size >= half_count);
397 			SLJIT_ASSERT(!jump || jump->addr >= half_count);
398 			SLJIT_ASSERT(!const_ || const_->addr >= half_count);
399 			if (label && label->size == half_count) {
400 				label->addr = ((sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset)) | 0x1;
401 				label->size = code_ptr - code;
402 				label = label->next;
403 			}
404 			if (jump && jump->addr == half_count) {
405 					jump->addr = (sljit_uw)code_ptr - ((jump->flags & IS_COND) ? 10 : 8);
406 					code_ptr -= detect_jump_type(jump, code_ptr, code, executable_offset);
407 					jump = jump->next;
408 			}
409 			if (const_ && const_->addr == half_count) {
410 				const_->addr = (sljit_uw)code_ptr;
411 				const_ = const_->next;
412 			}
413 			code_ptr ++;
414 			half_count ++;
415 		} while (buf_ptr < buf_end);
416 
417 		buf = buf->next;
418 	} while (buf);
419 
420 	if (label && label->size == half_count) {
421 		label->addr = ((sljit_uw)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset)) | 0x1;
422 		label->size = code_ptr - code;
423 		label = label->next;
424 	}
425 
426 	SLJIT_ASSERT(!label);
427 	SLJIT_ASSERT(!jump);
428 	SLJIT_ASSERT(!const_);
429 	SLJIT_ASSERT(code_ptr - code <= (sljit_sw)compiler->size);
430 
431 	jump = compiler->jumps;
432 	while (jump) {
433 		set_jump_instruction(jump, executable_offset);
434 		jump = jump->next;
435 	}
436 
437 	compiler->error = SLJIT_ERR_COMPILED;
438 	compiler->executable_offset = executable_offset;
439 	compiler->executable_size = (code_ptr - code) * sizeof(sljit_u16);
440 
441 	code = (sljit_u16 *)SLJIT_ADD_EXEC_OFFSET(code, executable_offset);
442 	code_ptr = (sljit_u16 *)SLJIT_ADD_EXEC_OFFSET(code_ptr, executable_offset);
443 
444 	SLJIT_CACHE_FLUSH(code, code_ptr);
445 	/* Set thumb mode flag. */
446 	return (void*)((sljit_uw)code | 0x1);
447 }
448 
sljit_has_cpu_feature(sljit_s32 feature_type)449 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_has_cpu_feature(sljit_s32 feature_type)
450 {
451 	switch (feature_type) {
452 	case SLJIT_HAS_FPU:
453 #ifdef SLJIT_IS_FPU_AVAILABLE
454 		return SLJIT_IS_FPU_AVAILABLE;
455 #else
456 		/* Available by default. */
457 		return 1;
458 #endif
459 
460 	case SLJIT_HAS_CLZ:
461 	case SLJIT_HAS_CMOV:
462 		return 1;
463 
464 	default:
465 		return 0;
466 	}
467 }
468 
469 /* --------------------------------------------------------------------- */
470 /*  Core code generator functions.                                       */
471 /* --------------------------------------------------------------------- */
472 
473 #define INVALID_IMM	0x80000000
get_imm(sljit_uw imm)474 static sljit_uw get_imm(sljit_uw imm)
475 {
476 	/* Thumb immediate form. */
477 	sljit_s32 counter;
478 
479 	if (imm <= 0xff)
480 		return imm;
481 
482 	if ((imm & 0xffff) == (imm >> 16)) {
483 		/* Some special cases. */
484 		if (!(imm & 0xff00))
485 			return (1 << 12) | (imm & 0xff);
486 		if (!(imm & 0xff))
487 			return (2 << 12) | ((imm >> 8) & 0xff);
488 		if ((imm & 0xff00) == ((imm & 0xff) << 8))
489 			return (3 << 12) | (imm & 0xff);
490 	}
491 
492 	/* Assembly optimization: count leading zeroes? */
493 	counter = 8;
494 	if (!(imm & 0xffff0000)) {
495 		counter += 16;
496 		imm <<= 16;
497 	}
498 	if (!(imm & 0xff000000)) {
499 		counter += 8;
500 		imm <<= 8;
501 	}
502 	if (!(imm & 0xf0000000)) {
503 		counter += 4;
504 		imm <<= 4;
505 	}
506 	if (!(imm & 0xc0000000)) {
507 		counter += 2;
508 		imm <<= 2;
509 	}
510 	if (!(imm & 0x80000000)) {
511 		counter += 1;
512 		imm <<= 1;
513 	}
514 	/* Since imm >= 128, this must be true. */
515 	SLJIT_ASSERT(counter <= 31);
516 
517 	if (imm & 0x00ffffff)
518 		return INVALID_IMM; /* Cannot be encoded. */
519 
520 	return ((imm >> 24) & 0x7f) | COPY_BITS(counter, 4, 26, 1) | COPY_BITS(counter, 1, 12, 3) | COPY_BITS(counter, 0, 7, 1);
521 }
522 
load_immediate(struct sljit_compiler * compiler,sljit_s32 dst,sljit_uw imm)523 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst, sljit_uw imm)
524 {
525 	sljit_uw tmp;
526 
527 	/* MOVS cannot be used since it destroy flags. */
528 
529 	if (imm >= 0x10000) {
530 		tmp = get_imm(imm);
531 		if (tmp != INVALID_IMM)
532 			return push_inst32(compiler, MOV_WI | RD4(dst) | tmp);
533 		tmp = get_imm(~imm);
534 		if (tmp != INVALID_IMM)
535 			return push_inst32(compiler, MVN_WI | RD4(dst) | tmp);
536 	}
537 
538 	/* set low 16 bits, set hi 16 bits to 0. */
539 	FAIL_IF(push_inst32(compiler, MOVW | RD4(dst)
540 		| COPY_BITS(imm, 12, 16, 4) | COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff)));
541 
542 	/* set hi 16 bit if needed. */
543 	if (imm >= 0x10000)
544 		return push_inst32(compiler, MOVT | RD4(dst)
545 			| COPY_BITS(imm, 12 + 16, 16, 4) | COPY_BITS(imm, 11 + 16, 26, 1) | COPY_BITS(imm, 8 + 16, 12, 3) | ((imm & 0xff0000) >> 16));
546 	return SLJIT_SUCCESS;
547 }
548 
549 #define ARG1_IMM	0x0010000
550 #define ARG2_IMM	0x0020000
551 /* SET_FLAGS must be 0x100000 as it is also the value of S bit (can be used for optimization). */
552 #define SET_FLAGS	0x0100000
553 #define UNUSED_RETURN	0x0200000
554 
emit_op_imm(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 dst,sljit_uw arg1,sljit_uw arg2)555 static sljit_s32 emit_op_imm(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 dst, sljit_uw arg1, sljit_uw arg2)
556 {
557 	/* dst must be register, TMP_REG1
558 	   arg1 must be register, imm
559 	   arg2 must be register, imm */
560 	sljit_s32 reg;
561 	sljit_uw imm, nimm;
562 
563 	if (SLJIT_UNLIKELY((flags & (ARG1_IMM | ARG2_IMM)) == (ARG1_IMM | ARG2_IMM))) {
564 		/* Both are immediates, no temporaries are used. */
565 		flags &= ~ARG1_IMM;
566 		FAIL_IF(load_immediate(compiler, TMP_REG1, arg1));
567 		arg1 = TMP_REG1;
568 	}
569 
570 	if (flags & (ARG1_IMM | ARG2_IMM)) {
571 		reg = (flags & ARG2_IMM) ? arg1 : arg2;
572 		imm = (flags & ARG2_IMM) ? arg2 : arg1;
573 
574 		switch (flags & 0xffff) {
575 		case SLJIT_CLZ:
576 		case SLJIT_MUL:
577 			/* No form with immediate operand. */
578 			break;
579 		case SLJIT_MOV:
580 			SLJIT_ASSERT(!(flags & SET_FLAGS) && (flags & ARG2_IMM) && arg1 == TMP_REG2);
581 			return load_immediate(compiler, dst, imm);
582 		case SLJIT_NOT:
583 			if (!(flags & SET_FLAGS))
584 				return load_immediate(compiler, dst, ~imm);
585 			/* Since the flags should be set, we just fallback to the register mode.
586 			   Although some clever things could be done here, "NOT IMM" does not worth the efforts. */
587 			break;
588 		case SLJIT_ADD:
589 			nimm = -imm;
590 			if (IS_2_LO_REGS(reg, dst)) {
591 				if (imm <= 0x7)
592 					return push_inst16(compiler, ADDSI3 | IMM3(imm) | RD3(dst) | RN3(reg));
593 				if (nimm <= 0x7)
594 					return push_inst16(compiler, SUBSI3 | IMM3(nimm) | RD3(dst) | RN3(reg));
595 				if (reg == dst) {
596 					if (imm <= 0xff)
597 						return push_inst16(compiler, ADDSI8 | IMM8(imm) | RDN3(dst));
598 					if (nimm <= 0xff)
599 						return push_inst16(compiler, SUBSI8 | IMM8(nimm) | RDN3(dst));
600 				}
601 			}
602 			if (!(flags & SET_FLAGS)) {
603 				if (imm <= 0xfff)
604 					return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(imm));
605 				if (nimm <= 0xfff)
606 					return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(nimm));
607 			}
608 			nimm = get_imm(imm);
609 			if (nimm != INVALID_IMM)
610 				return push_inst32(compiler, ADD_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
611 			nimm = get_imm(-imm);
612 			if (nimm != INVALID_IMM)
613 				return push_inst32(compiler, SUB_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
614 			break;
615 		case SLJIT_ADDC:
616 			imm = get_imm(imm);
617 			if (imm != INVALID_IMM)
618 				return push_inst32(compiler, ADCI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
619 			break;
620 		case SLJIT_SUB:
621 			/* SUB operation can be replaced by ADD because of the negative carry flag. */
622 			if (flags & ARG1_IMM) {
623 				if (imm == 0 && IS_2_LO_REGS(reg, dst))
624 					return push_inst16(compiler, RSBSI | RD3(dst) | RN3(reg));
625 				imm = get_imm(imm);
626 				if (imm != INVALID_IMM)
627 					return push_inst32(compiler, RSB_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
628 				break;
629 			}
630 			if (flags & UNUSED_RETURN) {
631 				if (imm <= 0xff && reg_map[reg] <= 7)
632 					return push_inst16(compiler, CMPI | IMM8(imm) | RDN3(reg));
633 				nimm = get_imm(imm);
634 				if (nimm != INVALID_IMM)
635 					return push_inst32(compiler, CMPI_W | RN4(reg) | nimm);
636 				nimm = get_imm(-imm);
637 				if (nimm != INVALID_IMM)
638 					return push_inst32(compiler, CMNI_W | RN4(reg) | nimm);
639 			}
640 			nimm = -imm;
641 			if (IS_2_LO_REGS(reg, dst)) {
642 				if (imm <= 0x7)
643 					return push_inst16(compiler, SUBSI3 | IMM3(imm) | RD3(dst) | RN3(reg));
644 				if (nimm <= 0x7)
645 					return push_inst16(compiler, ADDSI3 | IMM3(nimm) | RD3(dst) | RN3(reg));
646 				if (reg == dst) {
647 					if (imm <= 0xff)
648 						return push_inst16(compiler, SUBSI8 | IMM8(imm) | RDN3(dst));
649 					if (nimm <= 0xff)
650 						return push_inst16(compiler, ADDSI8 | IMM8(nimm) | RDN3(dst));
651 				}
652 			}
653 			if (!(flags & SET_FLAGS)) {
654 				if (imm <= 0xfff)
655 					return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(imm));
656 				if (nimm <= 0xfff)
657 					return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(nimm));
658 			}
659 			nimm = get_imm(imm);
660 			if (nimm != INVALID_IMM)
661 				return push_inst32(compiler, SUB_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
662 			nimm = get_imm(-imm);
663 			if (nimm != INVALID_IMM)
664 				return push_inst32(compiler, ADD_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
665 			break;
666 		case SLJIT_SUBC:
667 			if (flags & ARG1_IMM)
668 				break;
669 			imm = get_imm(imm);
670 			if (imm != INVALID_IMM)
671 				return push_inst32(compiler, SBCI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
672 			break;
673 		case SLJIT_AND:
674 			nimm = get_imm(imm);
675 			if (nimm != INVALID_IMM)
676 				return push_inst32(compiler, ANDI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
677 			imm = get_imm(imm);
678 			if (imm != INVALID_IMM)
679 				return push_inst32(compiler, BICI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
680 			break;
681 		case SLJIT_OR:
682 			nimm = get_imm(imm);
683 			if (nimm != INVALID_IMM)
684 				return push_inst32(compiler, ORRI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
685 			imm = get_imm(imm);
686 			if (imm != INVALID_IMM)
687 				return push_inst32(compiler, ORNI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
688 			break;
689 		case SLJIT_XOR:
690 			imm = get_imm(imm);
691 			if (imm != INVALID_IMM)
692 				return push_inst32(compiler, EORI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
693 			break;
694 		case SLJIT_SHL:
695 		case SLJIT_LSHR:
696 		case SLJIT_ASHR:
697 			if (flags & ARG1_IMM)
698 				break;
699 			imm &= 0x1f;
700 			if (imm == 0) {
701 				if (!(flags & SET_FLAGS))
702 					return push_inst16(compiler, MOV | SET_REGS44(dst, reg));
703 				if (IS_2_LO_REGS(dst, reg))
704 					return push_inst16(compiler, MOVS | RD3(dst) | RN3(reg));
705 				return push_inst32(compiler, MOV_W | SET_FLAGS | RD4(dst) | RM4(reg));
706 			}
707 			switch (flags & 0xffff) {
708 			case SLJIT_SHL:
709 				if (IS_2_LO_REGS(dst, reg))
710 					return push_inst16(compiler, LSLSI | RD3(dst) | RN3(reg) | (imm << 6));
711 				return push_inst32(compiler, LSL_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
712 			case SLJIT_LSHR:
713 				if (IS_2_LO_REGS(dst, reg))
714 					return push_inst16(compiler, LSRSI | RD3(dst) | RN3(reg) | (imm << 6));
715 				return push_inst32(compiler, LSR_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
716 			default: /* SLJIT_ASHR */
717 				if (IS_2_LO_REGS(dst, reg))
718 					return push_inst16(compiler, ASRSI | RD3(dst) | RN3(reg) | (imm << 6));
719 				return push_inst32(compiler, ASR_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
720 			}
721 		default:
722 			SLJIT_UNREACHABLE();
723 			break;
724 		}
725 
726 		if (flags & ARG2_IMM) {
727 			imm = arg2;
728 			arg2 = (arg1 == TMP_REG1) ? TMP_REG2 : TMP_REG1;
729 			FAIL_IF(load_immediate(compiler, arg2, imm));
730 		}
731 		else {
732 			imm = arg1;
733 			arg1 = (arg2 == TMP_REG1) ? TMP_REG2 : TMP_REG1;
734 			FAIL_IF(load_immediate(compiler, arg1, imm));
735 		}
736 
737 		SLJIT_ASSERT(arg1 != arg2);
738 	}
739 
740 	/* Both arguments are registers. */
741 	switch (flags & 0xffff) {
742 	case SLJIT_MOV:
743 	case SLJIT_MOV_U32:
744 	case SLJIT_MOV_S32:
745 	case SLJIT_MOV_P:
746 		SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG2);
747 		if (dst == arg2)
748 			return SLJIT_SUCCESS;
749 		return push_inst16(compiler, MOV | SET_REGS44(dst, arg2));
750 	case SLJIT_MOV_U8:
751 		SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG2);
752 		if (IS_2_LO_REGS(dst, arg2))
753 			return push_inst16(compiler, UXTB | RD3(dst) | RN3(arg2));
754 		return push_inst32(compiler, UXTB_W | RD4(dst) | RM4(arg2));
755 	case SLJIT_MOV_S8:
756 		SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG2);
757 		if (IS_2_LO_REGS(dst, arg2))
758 			return push_inst16(compiler, SXTB | RD3(dst) | RN3(arg2));
759 		return push_inst32(compiler, SXTB_W | RD4(dst) | RM4(arg2));
760 	case SLJIT_MOV_U16:
761 		SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG2);
762 		if (IS_2_LO_REGS(dst, arg2))
763 			return push_inst16(compiler, UXTH | RD3(dst) | RN3(arg2));
764 		return push_inst32(compiler, UXTH_W | RD4(dst) | RM4(arg2));
765 	case SLJIT_MOV_S16:
766 		SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG2);
767 		if (IS_2_LO_REGS(dst, arg2))
768 			return push_inst16(compiler, SXTH | RD3(dst) | RN3(arg2));
769 		return push_inst32(compiler, SXTH_W | RD4(dst) | RM4(arg2));
770 	case SLJIT_NOT:
771 		SLJIT_ASSERT(arg1 == TMP_REG2);
772 		if (IS_2_LO_REGS(dst, arg2))
773 			return push_inst16(compiler, MVNS | RD3(dst) | RN3(arg2));
774 		return push_inst32(compiler, MVN_W | (flags & SET_FLAGS) | RD4(dst) | RM4(arg2));
775 	case SLJIT_CLZ:
776 		SLJIT_ASSERT(arg1 == TMP_REG2);
777 		FAIL_IF(push_inst32(compiler, CLZ | RN4(arg2) | RD4(dst) | RM4(arg2)));
778 		return SLJIT_SUCCESS;
779 	case SLJIT_ADD:
780 		if (IS_3_LO_REGS(dst, arg1, arg2))
781 			return push_inst16(compiler, ADDS | RD3(dst) | RN3(arg1) | RM3(arg2));
782 		if (dst == arg1 && !(flags & SET_FLAGS))
783 			return push_inst16(compiler, ADD | SET_REGS44(dst, arg2));
784 		return push_inst32(compiler, ADD_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
785 	case SLJIT_ADDC:
786 		if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
787 			return push_inst16(compiler, ADCS | RD3(dst) | RN3(arg2));
788 		return push_inst32(compiler, ADC_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
789 	case SLJIT_SUB:
790 		if (flags & UNUSED_RETURN) {
791 			if (IS_2_LO_REGS(arg1, arg2))
792 				return push_inst16(compiler, CMP | RD3(arg1) | RN3(arg2));
793 			return push_inst16(compiler, CMP_X | SET_REGS44(arg1, arg2));
794 		}
795 		if (IS_3_LO_REGS(dst, arg1, arg2))
796 			return push_inst16(compiler, SUBS | RD3(dst) | RN3(arg1) | RM3(arg2));
797 		return push_inst32(compiler, SUB_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
798 	case SLJIT_SUBC:
799 		if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
800 			return push_inst16(compiler, SBCS | RD3(dst) | RN3(arg2));
801 		return push_inst32(compiler, SBC_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
802 	case SLJIT_MUL:
803 		if (!(flags & SET_FLAGS))
804 			return push_inst32(compiler, MUL | RD4(dst) | RN4(arg1) | RM4(arg2));
805 		SLJIT_ASSERT(dst != TMP_REG2);
806 		FAIL_IF(push_inst32(compiler, SMULL | RT4(dst) | RD4(TMP_REG2) | RN4(arg1) | RM4(arg2)));
807 		/* cmp TMP_REG2, dst asr #31. */
808 		return push_inst32(compiler, CMP_W | RN4(TMP_REG2) | 0x70e0 | RM4(dst));
809 	case SLJIT_AND:
810 		if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
811 			return push_inst16(compiler, ANDS | RD3(dst) | RN3(arg2));
812 		if ((flags & UNUSED_RETURN) && IS_2_LO_REGS(arg1, arg2))
813 			return push_inst16(compiler, TST | RD3(arg1) | RN3(arg2));
814 		return push_inst32(compiler, AND_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
815 	case SLJIT_OR:
816 		if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
817 			return push_inst16(compiler, ORRS | RD3(dst) | RN3(arg2));
818 		return push_inst32(compiler, ORR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
819 	case SLJIT_XOR:
820 		if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
821 			return push_inst16(compiler, EORS | RD3(dst) | RN3(arg2));
822 		return push_inst32(compiler, EOR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
823 	case SLJIT_SHL:
824 		if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
825 			return push_inst16(compiler, LSLS | RD3(dst) | RN3(arg2));
826 		return push_inst32(compiler, LSL_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
827 	case SLJIT_LSHR:
828 		if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
829 			return push_inst16(compiler, LSRS | RD3(dst) | RN3(arg2));
830 		return push_inst32(compiler, LSR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
831 	case SLJIT_ASHR:
832 		if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
833 			return push_inst16(compiler, ASRS | RD3(dst) | RN3(arg2));
834 		return push_inst32(compiler, ASR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
835 	}
836 
837 	SLJIT_UNREACHABLE();
838 	return SLJIT_SUCCESS;
839 }
840 
841 #define STORE		0x01
842 #define SIGNED		0x02
843 
844 #define WORD_SIZE	0x00
845 #define BYTE_SIZE	0x04
846 #define HALF_SIZE	0x08
847 #define PRELOAD		0x0c
848 
849 #define IS_WORD_SIZE(flags)		(!(flags & (BYTE_SIZE | HALF_SIZE)))
850 #define OFFSET_CHECK(imm, shift)	(!(argw & ~(imm << shift)))
851 
852 /*
853   1st letter:
854   w = word
855   b = byte
856   h = half
857 
858   2nd letter:
859   s = signed
860   u = unsigned
861 
862   3rd letter:
863   l = load
864   s = store
865 */
866 
867 static const sljit_ins sljit_mem16[12] = {
868 /* w u l */ 0x5800 /* ldr */,
869 /* w u s */ 0x5000 /* str */,
870 /* w s l */ 0x5800 /* ldr */,
871 /* w s s */ 0x5000 /* str */,
872 
873 /* b u l */ 0x5c00 /* ldrb */,
874 /* b u s */ 0x5400 /* strb */,
875 /* b s l */ 0x5600 /* ldrsb */,
876 /* b s s */ 0x5400 /* strb */,
877 
878 /* h u l */ 0x5a00 /* ldrh */,
879 /* h u s */ 0x5200 /* strh */,
880 /* h s l */ 0x5e00 /* ldrsh */,
881 /* h s s */ 0x5200 /* strh */,
882 };
883 
884 static const sljit_ins sljit_mem16_imm5[12] = {
885 /* w u l */ 0x6800 /* ldr imm5 */,
886 /* w u s */ 0x6000 /* str imm5 */,
887 /* w s l */ 0x6800 /* ldr imm5 */,
888 /* w s s */ 0x6000 /* str imm5 */,
889 
890 /* b u l */ 0x7800 /* ldrb imm5 */,
891 /* b u s */ 0x7000 /* strb imm5 */,
892 /* b s l */ 0x0000 /* not allowed */,
893 /* b s s */ 0x7000 /* strb imm5 */,
894 
895 /* h u l */ 0x8800 /* ldrh imm5 */,
896 /* h u s */ 0x8000 /* strh imm5 */,
897 /* h s l */ 0x0000 /* not allowed */,
898 /* h s s */ 0x8000 /* strh imm5 */,
899 };
900 
901 #define MEM_IMM8	0xc00
902 #define MEM_IMM12	0x800000
903 static const sljit_ins sljit_mem32[13] = {
904 /* w u l */ 0xf8500000 /* ldr.w */,
905 /* w u s */ 0xf8400000 /* str.w */,
906 /* w s l */ 0xf8500000 /* ldr.w */,
907 /* w s s */ 0xf8400000 /* str.w */,
908 
909 /* b u l */ 0xf8100000 /* ldrb.w */,
910 /* b u s */ 0xf8000000 /* strb.w */,
911 /* b s l */ 0xf9100000 /* ldrsb.w */,
912 /* b s s */ 0xf8000000 /* strb.w */,
913 
914 /* h u l */ 0xf8300000 /* ldrh.w */,
915 /* h u s */ 0xf8200000 /* strsh.w */,
916 /* h s l */ 0xf9300000 /* ldrsh.w */,
917 /* h s s */ 0xf8200000 /* strsh.w */,
918 
919 /* p u l */ 0xf8100000 /* pld */,
920 };
921 
922 /* Helper function. Dst should be reg + value, using at most 1 instruction, flags does not set. */
emit_set_delta(struct sljit_compiler * compiler,sljit_s32 dst,sljit_s32 reg,sljit_sw value)923 static sljit_s32 emit_set_delta(struct sljit_compiler *compiler, sljit_s32 dst, sljit_s32 reg, sljit_sw value)
924 {
925 	if (value >= 0) {
926 		if (value <= 0xfff)
927 			return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(value));
928 		value = get_imm(value);
929 		if (value != INVALID_IMM)
930 			return push_inst32(compiler, ADD_WI | RD4(dst) | RN4(reg) | value);
931 	}
932 	else {
933 		value = -value;
934 		if (value <= 0xfff)
935 			return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(value));
936 		value = get_imm(value);
937 		if (value != INVALID_IMM)
938 			return push_inst32(compiler, SUB_WI | RD4(dst) | RN4(reg) | value);
939 	}
940 	return SLJIT_ERR_UNSUPPORTED;
941 }
942 
emit_op_mem(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 reg,sljit_s32 arg,sljit_sw argw,sljit_s32 tmp_reg)943 static SLJIT_INLINE sljit_s32 emit_op_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg,
944 	sljit_s32 arg, sljit_sw argw, sljit_s32 tmp_reg)
945 {
946 	sljit_s32 other_r;
947 	sljit_uw tmp;
948 
949 	SLJIT_ASSERT(arg & SLJIT_MEM);
950 	SLJIT_ASSERT((arg & REG_MASK) != tmp_reg);
951 	arg &= ~SLJIT_MEM;
952 
953 	if (SLJIT_UNLIKELY(!(arg & REG_MASK))) {
954 		tmp = get_imm(argw & ~0xfff);
955 		if (tmp != INVALID_IMM) {
956 			FAIL_IF(push_inst32(compiler, MOV_WI | RD4(tmp_reg) | tmp));
957 			return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(tmp_reg) | (argw & 0xfff));
958 		}
959 
960 		FAIL_IF(load_immediate(compiler, tmp_reg, argw));
961 		if (IS_2_LO_REGS(reg, tmp_reg) && sljit_mem16_imm5[flags])
962 			return push_inst16(compiler, sljit_mem16_imm5[flags] | RD3(reg) | RN3(tmp_reg));
963 		return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(tmp_reg));
964 	}
965 
966 	if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
967 		argw &= 0x3;
968 		other_r = OFFS_REG(arg);
969 		arg &= 0xf;
970 
971 		if (!argw && IS_3_LO_REGS(reg, arg, other_r))
972 			return push_inst16(compiler, sljit_mem16[flags] | RD3(reg) | RN3(arg) | RM3(other_r));
973 		return push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(other_r) | (argw << 4));
974 	}
975 
976 	if (argw > 0xfff) {
977 		tmp = get_imm(argw & ~0xfff);
978 		if (tmp != INVALID_IMM) {
979 			push_inst32(compiler, ADD_WI | RD4(tmp_reg) | RN4(arg) | tmp);
980 			arg = tmp_reg;
981 			argw = argw & 0xfff;
982 		}
983 	}
984 	else if (argw < -0xff) {
985 		tmp = get_imm(-argw & ~0xff);
986 		if (tmp != INVALID_IMM) {
987 			push_inst32(compiler, SUB_WI | RD4(tmp_reg) | RN4(arg) | tmp);
988 			arg = tmp_reg;
989 			argw = -(-argw & 0xff);
990 		}
991 	}
992 
993 	if (IS_2_LO_REGS(reg, arg) && sljit_mem16_imm5[flags]) {
994 		tmp = 3;
995 		if (IS_WORD_SIZE(flags)) {
996 			if (OFFSET_CHECK(0x1f, 2))
997 				tmp = 2;
998 		}
999 		else if (flags & BYTE_SIZE)
1000 		{
1001 			if (OFFSET_CHECK(0x1f, 0))
1002 				tmp = 0;
1003 		}
1004 		else {
1005 			SLJIT_ASSERT(flags & HALF_SIZE);
1006 			if (OFFSET_CHECK(0x1f, 1))
1007 				tmp = 1;
1008 		}
1009 
1010 		if (tmp < 3)
1011 			return push_inst16(compiler, sljit_mem16_imm5[flags] | RD3(reg) | RN3(arg) | (argw << (6 - tmp)));
1012 	}
1013 	else if (SLJIT_UNLIKELY(arg == SLJIT_SP) && IS_WORD_SIZE(flags) && OFFSET_CHECK(0xff, 2) && reg_map[reg] <= 7) {
1014 		/* SP based immediate. */
1015 		return push_inst16(compiler, STR_SP | ((flags & STORE) ? 0 : 0x800) | RDN3(reg) | (argw >> 2));
1016 	}
1017 
1018 	if (argw >= 0 && argw <= 0xfff)
1019 		return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(arg) | argw);
1020 	else if (argw < 0 && argw >= -0xff)
1021 		return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM8 | RT4(reg) | RN4(arg) | -argw);
1022 
1023 	SLJIT_ASSERT(arg != tmp_reg);
1024 
1025 	FAIL_IF(load_immediate(compiler, tmp_reg, argw));
1026 	if (IS_3_LO_REGS(reg, arg, tmp_reg))
1027 		return push_inst16(compiler, sljit_mem16[flags] | RD3(reg) | RN3(arg) | RM3(tmp_reg));
1028 	return push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(tmp_reg));
1029 }
1030 
1031 /* --------------------------------------------------------------------- */
1032 /*  Entry, exit                                                          */
1033 /* --------------------------------------------------------------------- */
1034 
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)1035 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler,
1036 	sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
1037 	sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
1038 {
1039 	sljit_s32 args, size, i, tmp;
1040 	sljit_ins push = 0;
1041 #ifdef _WIN32
1042 	sljit_uw imm;
1043 #endif
1044 
1045 	CHECK_ERROR();
1046 	CHECK(check_sljit_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
1047 	set_emit_enter(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
1048 
1049 	tmp = saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - saveds) : SLJIT_FIRST_SAVED_REG;
1050 	for (i = SLJIT_S0; i >= tmp; i--)
1051 		push |= 1 << reg_map[i];
1052 
1053 	for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
1054 		push |= 1 << reg_map[i];
1055 
1056 	FAIL_IF((push & 0xff00)
1057 		? push_inst32(compiler, PUSH_W | (1 << 14) | push)
1058 		: push_inst16(compiler, PUSH | (1 << 8) | push));
1059 
1060 	/* Stack must be aligned to 8 bytes: (LR, R4) */
1061 	size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
1062 	local_size = ((size + local_size + 7) & ~7) - size;
1063 	compiler->local_size = local_size;
1064 
1065 #ifdef _WIN32
1066 	if (local_size >= 256) {
1067 		if (local_size > 4096)
1068 			imm = get_imm(4096);
1069 		else
1070 			imm = get_imm(local_size & ~0xff);
1071 
1072 		SLJIT_ASSERT(imm != INVALID_IMM);
1073 		FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(SLJIT_SP) | imm));
1074 	}
1075 #else
1076 	if (local_size > 0) {
1077 		if (local_size <= (127 << 2))
1078 			FAIL_IF(push_inst16(compiler, SUB_SP | (local_size >> 2)));
1079 		else
1080 			FAIL_IF(emit_op_imm(compiler, SLJIT_SUB | ARG2_IMM, SLJIT_SP, SLJIT_SP, local_size));
1081 	}
1082 #endif
1083 
1084 	args = get_arg_count(arg_types);
1085 
1086 	if (args >= 1)
1087 		FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_S0, SLJIT_R0)));
1088 	if (args >= 2)
1089 		FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_S1, SLJIT_R1)));
1090 	if (args >= 3)
1091 		FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_S2, SLJIT_R2)));
1092 
1093 #ifdef _WIN32
1094 	if (local_size >= 256) {
1095 		if (local_size > 4096) {
1096 			imm = get_imm(4096);
1097 			SLJIT_ASSERT(imm != INVALID_IMM);
1098 
1099 			if (local_size < 4 * 4096) {
1100 				if (local_size > 2 * 4096) {
1101 					FAIL_IF(push_inst32(compiler, LDRI | 0x400 | RT4(TMP_REG2) | RN4(TMP_REG1)));
1102 					FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(TMP_REG1) | imm));
1103 					local_size -= 4096;
1104 				}
1105 
1106 				if (local_size > 2 * 4096) {
1107 					FAIL_IF(push_inst32(compiler, LDRI | 0x400 | RT4(TMP_REG2) | RN4(TMP_REG1)));
1108 					FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(TMP_REG1) | imm));
1109 					local_size -= 4096;
1110 				}
1111 
1112 				FAIL_IF(push_inst32(compiler, LDRI | 0x400 | RT4(TMP_REG2) | RN4(TMP_REG1)));
1113 				local_size -= 4096;
1114 
1115 				SLJIT_ASSERT(local_size > 0);
1116 			}
1117 			else {
1118 				FAIL_IF(load_immediate(compiler, SLJIT_R3, (local_size >> 12) - 1));
1119 				FAIL_IF(push_inst32(compiler, LDRI | 0x400 | RT4(TMP_REG2) | RN4(TMP_REG1)));
1120 				FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(TMP_REG1) | imm));
1121 				SLJIT_ASSERT(reg_map[SLJIT_R3] < 7);
1122 				FAIL_IF(push_inst16(compiler, SUBSI8 | RDN3(SLJIT_R3) | 1));
1123 				FAIL_IF(push_inst16(compiler, BCC | (0x1 << 8) /* not-equal */ | (-7 & 0xff)));
1124 
1125 				local_size &= 0xfff;
1126 
1127 				if (local_size != 0)
1128 					FAIL_IF(push_inst32(compiler, LDRI | 0x400 | RT4(TMP_REG2) | RN4(TMP_REG1)));
1129 			}
1130 
1131 			if (local_size >= 256) {
1132 				imm = get_imm(local_size & ~0xff);
1133 				SLJIT_ASSERT(imm != INVALID_IMM);
1134 
1135 				FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(TMP_REG1) | imm));
1136 			}
1137 		}
1138 
1139 		local_size &= 0xff;
1140 		FAIL_IF(push_inst32(compiler, LDRI | 0x400 | (local_size > 0 ? 0x100 : 0) | RT4(TMP_REG2) | RN4(TMP_REG1) | local_size));
1141 
1142 		FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_SP, TMP_REG1)));
1143 	}
1144 	else if (local_size > 0)
1145 		FAIL_IF(push_inst32(compiler, LDRI | 0x500 | RT4(TMP_REG1) | RN4(SLJIT_SP) | local_size));
1146 #endif
1147 
1148 	return SLJIT_SUCCESS;
1149 }
1150 
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)1151 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler,
1152 	sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds,
1153 	sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
1154 {
1155 	sljit_s32 size;
1156 
1157 	CHECK_ERROR();
1158 	CHECK(check_sljit_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size));
1159 	set_set_context(compiler, options, arg_types, scratches, saveds, fscratches, fsaveds, local_size);
1160 
1161 	size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 1);
1162 	compiler->local_size = ((size + local_size + 7) & ~7) - size;
1163 	return SLJIT_SUCCESS;
1164 }
1165 
sljit_emit_return(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src,sljit_sw srcw)1166 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw)
1167 {
1168 	sljit_s32 i, tmp;
1169 	sljit_ins pop = 0;
1170 
1171 	CHECK_ERROR();
1172 	CHECK(check_sljit_emit_return(compiler, op, src, srcw));
1173 
1174 	FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
1175 
1176 	if (compiler->local_size > 0) {
1177 		if (compiler->local_size <= (127 << 2))
1178 			FAIL_IF(push_inst16(compiler, ADD_SP | (compiler->local_size >> 2)));
1179 		else
1180 			FAIL_IF(emit_op_imm(compiler, SLJIT_ADD | ARG2_IMM, SLJIT_SP, SLJIT_SP, compiler->local_size));
1181 	}
1182 
1183 	tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG;
1184 	for (i = SLJIT_S0; i >= tmp; i--)
1185 		pop |= 1 << reg_map[i];
1186 
1187 	for (i = compiler->scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
1188 		pop |= 1 << reg_map[i];
1189 
1190 	return (pop & 0xff00)
1191 		? push_inst32(compiler, POP_W | (1 << 15) | pop)
1192 		: push_inst16(compiler, POP | (1 << 8) | pop);
1193 }
1194 
1195 /* --------------------------------------------------------------------- */
1196 /*  Operators                                                            */
1197 /* --------------------------------------------------------------------- */
1198 
1199 #if !(defined __ARM_FEATURE_IDIV) && !(defined __ARM_ARCH_EXT_IDIV__)
1200 
1201 #ifdef __cplusplus
1202 extern "C" {
1203 #endif
1204 
1205 #ifdef _WIN32
1206 extern unsigned long long __rt_udiv(unsigned int denominator, unsigned int numerator);
1207 extern long long __rt_sdiv(int denominator, int numerator);
1208 #elif defined(__GNUC__)
1209 extern unsigned int __aeabi_uidivmod(unsigned int numerator, int unsigned denominator);
1210 extern int __aeabi_idivmod(int numerator, int denominator);
1211 #else
1212 #error "Software divmod functions are needed"
1213 #endif
1214 
1215 #ifdef __cplusplus
1216 }
1217 #endif
1218 
1219 #endif /* !__ARM_FEATURE_IDIV && !__ARM_ARCH_EXT_IDIV__ */
1220 
sljit_emit_op0(struct sljit_compiler * compiler,sljit_s32 op)1221 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op0(struct sljit_compiler *compiler, sljit_s32 op)
1222 {
1223 #if !(defined __ARM_FEATURE_IDIV) && !(defined __ARM_ARCH_EXT_IDIV__)
1224 	sljit_sw saved_reg_list[3];
1225 	sljit_sw saved_reg_count;
1226 #endif
1227 
1228 	CHECK_ERROR();
1229 	CHECK(check_sljit_emit_op0(compiler, op));
1230 
1231 	op = GET_OPCODE(op);
1232 	switch (op) {
1233 	case SLJIT_BREAKPOINT:
1234 		return push_inst16(compiler, BKPT);
1235 	case SLJIT_NOP:
1236 		return push_inst16(compiler, NOP);
1237 	case SLJIT_LMUL_UW:
1238 	case SLJIT_LMUL_SW:
1239 		return push_inst32(compiler, (op == SLJIT_LMUL_UW ? UMULL : SMULL)
1240 			| (reg_map[SLJIT_R1] << 8)
1241 			| (reg_map[SLJIT_R0] << 12)
1242 			| (reg_map[SLJIT_R0] << 16)
1243 			| reg_map[SLJIT_R1]);
1244 #if (defined __ARM_FEATURE_IDIV) || (defined __ARM_ARCH_EXT_IDIV__)
1245 	case SLJIT_DIVMOD_UW:
1246 	case SLJIT_DIVMOD_SW:
1247 		FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG1, SLJIT_R0)));
1248 		FAIL_IF(push_inst32(compiler, (op == SLJIT_DIVMOD_UW ? UDIV : SDIV) | RD4(SLJIT_R0) | RN4(SLJIT_R0) | RM4(SLJIT_R1)));
1249 		FAIL_IF(push_inst32(compiler, MUL | RD4(SLJIT_R1) | RN4(SLJIT_R0) | RM4(SLJIT_R1)));
1250 		return push_inst32(compiler, SUB_W | RD4(SLJIT_R1) | RN4(TMP_REG1) | RM4(SLJIT_R1));
1251 	case SLJIT_DIV_UW:
1252 	case SLJIT_DIV_SW:
1253 		return push_inst32(compiler, (op == SLJIT_DIV_UW ? UDIV : SDIV) | RD4(SLJIT_R0) | RN4(SLJIT_R0) | RM4(SLJIT_R1));
1254 #else /* !__ARM_FEATURE_IDIV && !__ARM_ARCH_EXT_IDIV__ */
1255 	case SLJIT_DIVMOD_UW:
1256 	case SLJIT_DIVMOD_SW:
1257 	case SLJIT_DIV_UW:
1258 	case SLJIT_DIV_SW:
1259 		SLJIT_COMPILE_ASSERT((SLJIT_DIVMOD_UW & 0x2) == 0 && SLJIT_DIV_UW - 0x2 == SLJIT_DIVMOD_UW, bad_div_opcode_assignments);
1260 		SLJIT_ASSERT(reg_map[2] == 1 && reg_map[3] == 2 && reg_map[4] == 3);
1261 
1262 		saved_reg_count = 0;
1263 		if (compiler->scratches >= 4)
1264 			saved_reg_list[saved_reg_count++] = 3;
1265 		if (compiler->scratches >= 3)
1266 			saved_reg_list[saved_reg_count++] = 2;
1267 		if (op >= SLJIT_DIV_UW)
1268 			saved_reg_list[saved_reg_count++] = 1;
1269 
1270 		if (saved_reg_count > 0) {
1271 			FAIL_IF(push_inst32(compiler, 0xf84d0d00 | (saved_reg_count >= 3 ? 16 : 8)
1272 						| (saved_reg_list[0] << 12) /* str rX, [sp, #-8/-16]! */));
1273 			if (saved_reg_count >= 2) {
1274 				SLJIT_ASSERT(saved_reg_list[1] < 8);
1275 				FAIL_IF(push_inst16(compiler, 0x9001 | (saved_reg_list[1] << 8) /* str rX, [sp, #4] */));
1276 			}
1277 			if (saved_reg_count >= 3) {
1278 				SLJIT_ASSERT(saved_reg_list[2] < 8);
1279 				FAIL_IF(push_inst16(compiler, 0x9002 | (saved_reg_list[2] << 8) /* str rX, [sp, #8] */));
1280 			}
1281 		}
1282 
1283 #ifdef _WIN32
1284 		FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG1, SLJIT_R0)));
1285 		FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_R0, SLJIT_R1)));
1286 		FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_R1, TMP_REG1)));
1287 		FAIL_IF(sljit_emit_ijump(compiler, SLJIT_FAST_CALL, SLJIT_IMM,
1288 			((op | 0x2) == SLJIT_DIV_UW ? SLJIT_FUNC_OFFSET(__rt_udiv) : SLJIT_FUNC_OFFSET(__rt_sdiv))));
1289 #elif defined(__GNUC__)
1290 		FAIL_IF(sljit_emit_ijump(compiler, SLJIT_FAST_CALL, SLJIT_IMM,
1291 			((op | 0x2) == SLJIT_DIV_UW ? SLJIT_FUNC_OFFSET(__aeabi_uidivmod) : SLJIT_FUNC_OFFSET(__aeabi_idivmod))));
1292 #else
1293 #error "Software divmod functions are needed"
1294 #endif
1295 
1296 		if (saved_reg_count > 0) {
1297 			if (saved_reg_count >= 3) {
1298 				SLJIT_ASSERT(saved_reg_list[2] < 8);
1299 				FAIL_IF(push_inst16(compiler, 0x9802 | (saved_reg_list[2] << 8) /* ldr rX, [sp, #8] */));
1300 			}
1301 			if (saved_reg_count >= 2) {
1302 				SLJIT_ASSERT(saved_reg_list[1] < 8);
1303 				FAIL_IF(push_inst16(compiler, 0x9801 | (saved_reg_list[1] << 8) /* ldr rX, [sp, #4] */));
1304 			}
1305 			return push_inst32(compiler, 0xf85d0b00 | (saved_reg_count >= 3 ? 16 : 8)
1306 						| (saved_reg_list[0] << 12) /* ldr rX, [sp], #8/16 */);
1307 		}
1308 		return SLJIT_SUCCESS;
1309 #endif /* __ARM_FEATURE_IDIV || __ARM_ARCH_EXT_IDIV__ */
1310 	}
1311 
1312 	return SLJIT_SUCCESS;
1313 }
1314 
sljit_emit_op1(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1315 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op1(struct sljit_compiler *compiler, sljit_s32 op,
1316 	sljit_s32 dst, sljit_sw dstw,
1317 	sljit_s32 src, sljit_sw srcw)
1318 {
1319 	sljit_s32 dst_r, flags;
1320 	sljit_s32 op_flags = GET_ALL_FLAGS(op);
1321 
1322 	CHECK_ERROR();
1323 	CHECK(check_sljit_emit_op1(compiler, op, dst, dstw, src, srcw));
1324 	ADJUST_LOCAL_OFFSET(dst, dstw);
1325 	ADJUST_LOCAL_OFFSET(src, srcw);
1326 
1327 	if (dst == SLJIT_UNUSED && !HAS_FLAGS(op)) {
1328 		/* Since TMP_PC has index 15, IS_2_LO_REGS and IS_3_LO_REGS checks always fail. */
1329 		if (op <= SLJIT_MOV_P && (src & SLJIT_MEM))
1330 			return emit_op_mem(compiler, PRELOAD, TMP_PC, src, srcw, TMP_REG1);
1331 		return SLJIT_SUCCESS;
1332 	}
1333 
1334 	dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG1;
1335 
1336 	op = GET_OPCODE(op);
1337 	if (op >= SLJIT_MOV && op <= SLJIT_MOV_P) {
1338 		switch (op) {
1339 		case SLJIT_MOV:
1340 		case SLJIT_MOV_U32:
1341 		case SLJIT_MOV_S32:
1342 		case SLJIT_MOV_P:
1343 			flags = WORD_SIZE;
1344 			break;
1345 		case SLJIT_MOV_U8:
1346 			flags = BYTE_SIZE;
1347 			if (src & SLJIT_IMM)
1348 				srcw = (sljit_u8)srcw;
1349 			break;
1350 		case SLJIT_MOV_S8:
1351 			flags = BYTE_SIZE | SIGNED;
1352 			if (src & SLJIT_IMM)
1353 				srcw = (sljit_s8)srcw;
1354 			break;
1355 		case SLJIT_MOV_U16:
1356 			flags = HALF_SIZE;
1357 			if (src & SLJIT_IMM)
1358 				srcw = (sljit_u16)srcw;
1359 			break;
1360 		case SLJIT_MOV_S16:
1361 			flags = HALF_SIZE | SIGNED;
1362 			if (src & SLJIT_IMM)
1363 				srcw = (sljit_s16)srcw;
1364 			break;
1365 		default:
1366 			SLJIT_UNREACHABLE();
1367 			flags = 0;
1368 			break;
1369 		}
1370 
1371 		if (src & SLJIT_IMM)
1372 			FAIL_IF(emit_op_imm(compiler, SLJIT_MOV | ARG2_IMM, dst_r, TMP_REG2, srcw));
1373 		else if (src & SLJIT_MEM) {
1374 			FAIL_IF(emit_op_mem(compiler, flags, dst_r, src, srcw, TMP_REG1));
1375 		} else {
1376 			if (dst_r != TMP_REG1)
1377 				return emit_op_imm(compiler, op, dst_r, TMP_REG2, src);
1378 			dst_r = src;
1379 		}
1380 
1381 		if (!(dst & SLJIT_MEM))
1382 			return SLJIT_SUCCESS;
1383 
1384 		return emit_op_mem(compiler, flags | STORE, dst_r, dst, dstw, TMP_REG2);
1385 	}
1386 
1387 	if (op == SLJIT_NEG) {
1388 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
1389 			|| (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
1390 		compiler->skip_checks = 1;
1391 #endif
1392 		return sljit_emit_op2(compiler, SLJIT_SUB | op_flags, dst, dstw, SLJIT_IMM, 0, src, srcw);
1393 	}
1394 
1395 	flags = HAS_FLAGS(op_flags) ? SET_FLAGS : 0;
1396 
1397 	if (src & SLJIT_MEM) {
1398 		FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, src, srcw, TMP_REG1));
1399 		src = TMP_REG1;
1400 	}
1401 
1402 	emit_op_imm(compiler, flags | op, dst_r, TMP_REG2, src);
1403 
1404 	if (SLJIT_UNLIKELY(dst & SLJIT_MEM))
1405 		return emit_op_mem(compiler, flags | STORE, dst_r, dst, dstw, TMP_REG2);
1406 	return SLJIT_SUCCESS;
1407 }
1408 
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)1409 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op2(struct sljit_compiler *compiler, sljit_s32 op,
1410 	sljit_s32 dst, sljit_sw dstw,
1411 	sljit_s32 src1, sljit_sw src1w,
1412 	sljit_s32 src2, sljit_sw src2w)
1413 {
1414 	sljit_s32 dst_reg, flags, src2_reg;
1415 
1416 	CHECK_ERROR();
1417 	CHECK(check_sljit_emit_op2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1418 	ADJUST_LOCAL_OFFSET(dst, dstw);
1419 	ADJUST_LOCAL_OFFSET(src1, src1w);
1420 	ADJUST_LOCAL_OFFSET(src2, src2w);
1421 
1422 	if (dst == SLJIT_UNUSED && !HAS_FLAGS(op))
1423 		return SLJIT_SUCCESS;
1424 
1425 	dst_reg = SLOW_IS_REG(dst) ? dst : TMP_REG1;
1426 	flags = HAS_FLAGS(op) ? SET_FLAGS : 0;
1427 
1428 	if (src1 & SLJIT_IMM)
1429 		flags |= ARG1_IMM;
1430 	else if (src1 & SLJIT_MEM) {
1431 		emit_op_mem(compiler, WORD_SIZE, TMP_REG1, src1, src1w, TMP_REG1);
1432 		src1w = TMP_REG1;
1433 	}
1434 	else
1435 		src1w = src1;
1436 
1437 	if (src2 & SLJIT_IMM)
1438 		flags |= ARG2_IMM;
1439 	else if (src2 & SLJIT_MEM) {
1440 		src2_reg = (!(flags & ARG1_IMM) && (src1w == TMP_REG1)) ? TMP_REG2 : TMP_REG1;
1441 		emit_op_mem(compiler, WORD_SIZE, src2_reg, src2, src2w, src2_reg);
1442 		src2w = src2_reg;
1443 	}
1444 	else
1445 		src2w = src2;
1446 
1447 	if (dst == SLJIT_UNUSED)
1448 		flags |= UNUSED_RETURN;
1449 
1450 	emit_op_imm(compiler, flags | GET_OPCODE(op), dst_reg, src1w, src2w);
1451 
1452 	if (!(dst & SLJIT_MEM))
1453 		return SLJIT_SUCCESS;
1454 	return emit_op_mem(compiler, WORD_SIZE | STORE, dst_reg, dst, dstw, TMP_REG2);
1455 }
1456 
sljit_get_register_index(sljit_s32 reg)1457 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_register_index(sljit_s32 reg)
1458 {
1459 	CHECK_REG_INDEX(check_sljit_get_register_index(reg));
1460 	return reg_map[reg];
1461 }
1462 
sljit_get_float_register_index(sljit_s32 reg)1463 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_float_register_index(sljit_s32 reg)
1464 {
1465 	CHECK_REG_INDEX(check_sljit_get_float_register_index(reg));
1466 	return (freg_map[reg] << 1);
1467 }
1468 
sljit_emit_op_custom(struct sljit_compiler * compiler,void * instruction,sljit_s32 size)1469 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_custom(struct sljit_compiler *compiler,
1470 	void *instruction, sljit_s32 size)
1471 {
1472 	CHECK_ERROR();
1473 	CHECK(check_sljit_emit_op_custom(compiler, instruction, size));
1474 
1475 	if (size == 2)
1476 		return push_inst16(compiler, *(sljit_u16*)instruction);
1477 	return push_inst32(compiler, *(sljit_ins*)instruction);
1478 }
1479 
1480 /* --------------------------------------------------------------------- */
1481 /*  Floating point operators                                             */
1482 /* --------------------------------------------------------------------- */
1483 
1484 #define FPU_LOAD (1 << 20)
1485 
emit_fop_mem(struct sljit_compiler * compiler,sljit_s32 flags,sljit_s32 reg,sljit_s32 arg,sljit_sw argw)1486 static sljit_s32 emit_fop_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg, sljit_s32 arg, sljit_sw argw)
1487 {
1488 	sljit_uw imm;
1489 	sljit_sw inst = VSTR_F32 | (flags & (SLJIT_F32_OP | FPU_LOAD));
1490 
1491 	SLJIT_ASSERT(arg & SLJIT_MEM);
1492 
1493 	/* Fast loads and stores. */
1494 	if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
1495 		FAIL_IF(push_inst32(compiler, ADD_W | RD4(TMP_REG1) | RN4(arg & REG_MASK) | RM4(OFFS_REG(arg)) | ((argw & 0x3) << 6)));
1496 		arg = SLJIT_MEM | TMP_REG1;
1497 		argw = 0;
1498 	}
1499 
1500 	if ((arg & REG_MASK) && (argw & 0x3) == 0) {
1501 		if (!(argw & ~0x3fc))
1502 			return push_inst32(compiler, inst | 0x800000 | RN4(arg & REG_MASK) | DD4(reg) | (argw >> 2));
1503 		if (!(-argw & ~0x3fc))
1504 			return push_inst32(compiler, inst | RN4(arg & REG_MASK) | DD4(reg) | (-argw >> 2));
1505 	}
1506 
1507 	if (arg & REG_MASK) {
1508 		if (emit_set_delta(compiler, TMP_REG1, arg & REG_MASK, argw) != SLJIT_ERR_UNSUPPORTED) {
1509 			FAIL_IF(compiler->error);
1510 			return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG1) | DD4(reg));
1511 		}
1512 		imm = get_imm(argw & ~0x3fc);
1513 		if (imm != INVALID_IMM) {
1514 			FAIL_IF(push_inst32(compiler, ADD_WI | RD4(TMP_REG1) | RN4(arg & REG_MASK) | imm));
1515 			return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG1) | DD4(reg) | ((argw & 0x3fc) >> 2));
1516 		}
1517 		imm = get_imm(-argw & ~0x3fc);
1518 		if (imm != INVALID_IMM) {
1519 			argw = -argw;
1520 			FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(arg & REG_MASK) | imm));
1521 			return push_inst32(compiler, inst | RN4(TMP_REG1) | DD4(reg) | ((argw & 0x3fc) >> 2));
1522 		}
1523 	}
1524 
1525 	FAIL_IF(load_immediate(compiler, TMP_REG1, argw));
1526 	if (arg & REG_MASK)
1527 		FAIL_IF(push_inst16(compiler, ADD | SET_REGS44(TMP_REG1, (arg & REG_MASK))));
1528 	return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG1) | DD4(reg));
1529 }
1530 
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)1531 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_sw_from_f64(struct sljit_compiler *compiler, sljit_s32 op,
1532 	sljit_s32 dst, sljit_sw dstw,
1533 	sljit_s32 src, sljit_sw srcw)
1534 {
1535 	op ^= SLJIT_F32_OP;
1536 
1537 	if (src & SLJIT_MEM) {
1538 		FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src, srcw));
1539 		src = TMP_FREG1;
1540 	}
1541 
1542 	FAIL_IF(push_inst32(compiler, VCVT_S32_F32 | (op & SLJIT_F32_OP) | DD4(TMP_FREG1) | DM4(src)));
1543 
1544 	if (FAST_IS_REG(dst))
1545 		return push_inst32(compiler, VMOV | (1 << 20) | RT4(dst) | DN4(TMP_FREG1));
1546 
1547 	/* Store the integer value from a VFP register. */
1548 	return emit_fop_mem(compiler, 0, TMP_FREG1, dst, dstw);
1549 }
1550 
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)1551 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_f64_from_sw(struct sljit_compiler *compiler, sljit_s32 op,
1552 	sljit_s32 dst, sljit_sw dstw,
1553 	sljit_s32 src, sljit_sw srcw)
1554 {
1555 	sljit_s32 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1556 
1557 	op ^= SLJIT_F32_OP;
1558 
1559 	if (FAST_IS_REG(src))
1560 		FAIL_IF(push_inst32(compiler, VMOV | RT4(src) | DN4(TMP_FREG1)));
1561 	else if (src & SLJIT_MEM) {
1562 		/* Load the integer value into a VFP register. */
1563 		FAIL_IF(emit_fop_mem(compiler, FPU_LOAD, TMP_FREG1, src, srcw));
1564 	}
1565 	else {
1566 		FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
1567 		FAIL_IF(push_inst32(compiler, VMOV | RT4(TMP_REG1) | DN4(TMP_FREG1)));
1568 	}
1569 
1570 	FAIL_IF(push_inst32(compiler, VCVT_F32_S32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(TMP_FREG1)));
1571 
1572 	if (dst & SLJIT_MEM)
1573 		return emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw);
1574 	return SLJIT_SUCCESS;
1575 }
1576 
sljit_emit_fop1_cmp(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 src1,sljit_sw src1w,sljit_s32 src2,sljit_sw src2w)1577 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_cmp(struct sljit_compiler *compiler, sljit_s32 op,
1578 	sljit_s32 src1, sljit_sw src1w,
1579 	sljit_s32 src2, sljit_sw src2w)
1580 {
1581 	op ^= SLJIT_F32_OP;
1582 
1583 	if (src1 & SLJIT_MEM) {
1584 		emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w);
1585 		src1 = TMP_FREG1;
1586 	}
1587 
1588 	if (src2 & SLJIT_MEM) {
1589 		emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w);
1590 		src2 = TMP_FREG2;
1591 	}
1592 
1593 	FAIL_IF(push_inst32(compiler, VCMP_F32 | (op & SLJIT_F32_OP) | DD4(src1) | DM4(src2)));
1594 	return push_inst32(compiler, VMRS);
1595 }
1596 
sljit_emit_fop1(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 src,sljit_sw srcw)1597 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop1(struct sljit_compiler *compiler, sljit_s32 op,
1598 	sljit_s32 dst, sljit_sw dstw,
1599 	sljit_s32 src, sljit_sw srcw)
1600 {
1601 	sljit_s32 dst_r;
1602 
1603 	CHECK_ERROR();
1604 
1605 	SLJIT_COMPILE_ASSERT((SLJIT_F32_OP == 0x100), float_transfer_bit_error);
1606 	SELECT_FOP1_OPERATION_WITH_CHECKS(compiler, op, dst, dstw, src, srcw);
1607 
1608 	dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1609 
1610 	if (GET_OPCODE(op) != SLJIT_CONV_F64_FROM_F32)
1611 		op ^= SLJIT_F32_OP;
1612 
1613 	if (src & SLJIT_MEM) {
1614 		emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, dst_r, src, srcw);
1615 		src = dst_r;
1616 	}
1617 
1618 	switch (GET_OPCODE(op)) {
1619 	case SLJIT_MOV_F64:
1620 		if (src != dst_r) {
1621 			if (dst_r != TMP_FREG1)
1622 				FAIL_IF(push_inst32(compiler, VMOV_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
1623 			else
1624 				dst_r = src;
1625 		}
1626 		break;
1627 	case SLJIT_NEG_F64:
1628 		FAIL_IF(push_inst32(compiler, VNEG_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
1629 		break;
1630 	case SLJIT_ABS_F64:
1631 		FAIL_IF(push_inst32(compiler, VABS_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
1632 		break;
1633 	case SLJIT_CONV_F64_FROM_F32:
1634 		FAIL_IF(push_inst32(compiler, VCVT_F64_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
1635 		op ^= SLJIT_F32_OP;
1636 		break;
1637 	}
1638 
1639 	if (dst & SLJIT_MEM)
1640 		return emit_fop_mem(compiler, (op & SLJIT_F32_OP), dst_r, dst, dstw);
1641 	return SLJIT_SUCCESS;
1642 }
1643 
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)1644 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop2(struct sljit_compiler *compiler, sljit_s32 op,
1645 	sljit_s32 dst, sljit_sw dstw,
1646 	sljit_s32 src1, sljit_sw src1w,
1647 	sljit_s32 src2, sljit_sw src2w)
1648 {
1649 	sljit_s32 dst_r;
1650 
1651 	CHECK_ERROR();
1652 	CHECK(check_sljit_emit_fop2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1653 	ADJUST_LOCAL_OFFSET(dst, dstw);
1654 	ADJUST_LOCAL_OFFSET(src1, src1w);
1655 	ADJUST_LOCAL_OFFSET(src2, src2w);
1656 
1657 	op ^= SLJIT_F32_OP;
1658 
1659 	dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1660 	if (src1 & SLJIT_MEM) {
1661 		emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w);
1662 		src1 = TMP_FREG1;
1663 	}
1664 	if (src2 & SLJIT_MEM) {
1665 		emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w);
1666 		src2 = TMP_FREG2;
1667 	}
1668 
1669 	switch (GET_OPCODE(op)) {
1670 	case SLJIT_ADD_F64:
1671 		FAIL_IF(push_inst32(compiler, VADD_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
1672 		break;
1673 	case SLJIT_SUB_F64:
1674 		FAIL_IF(push_inst32(compiler, VSUB_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
1675 		break;
1676 	case SLJIT_MUL_F64:
1677 		FAIL_IF(push_inst32(compiler, VMUL_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
1678 		break;
1679 	case SLJIT_DIV_F64:
1680 		FAIL_IF(push_inst32(compiler, VDIV_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
1681 		break;
1682 	}
1683 
1684 	if (!(dst & SLJIT_MEM))
1685 		return SLJIT_SUCCESS;
1686 	return emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw);
1687 }
1688 
1689 #undef FPU_LOAD
1690 
1691 /* --------------------------------------------------------------------- */
1692 /*  Other instructions                                                   */
1693 /* --------------------------------------------------------------------- */
1694 
sljit_emit_fast_enter(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw)1695 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
1696 {
1697 	CHECK_ERROR();
1698 	CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
1699 	ADJUST_LOCAL_OFFSET(dst, dstw);
1700 
1701 	SLJIT_ASSERT(reg_map[TMP_REG2] == 14);
1702 
1703 	if (FAST_IS_REG(dst))
1704 		return push_inst16(compiler, MOV | SET_REGS44(dst, TMP_REG2));
1705 
1706 	/* Memory. */
1707 	return emit_op_mem(compiler, WORD_SIZE | STORE, TMP_REG2, dst, dstw, TMP_REG1);
1708 }
1709 
sljit_emit_fast_return(struct sljit_compiler * compiler,sljit_s32 src,sljit_sw srcw)1710 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw)
1711 {
1712 	CHECK_ERROR();
1713 	CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
1714 	ADJUST_LOCAL_OFFSET(src, srcw);
1715 
1716 	SLJIT_ASSERT(reg_map[TMP_REG2] == 14);
1717 
1718 	if (FAST_IS_REG(src))
1719 		FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG2, src)));
1720 	else
1721 		FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG2, src, srcw, TMP_REG2));
1722 
1723 	return push_inst16(compiler, BX | RN3(TMP_REG2));
1724 }
1725 
1726 /* --------------------------------------------------------------------- */
1727 /*  Conditional instructions                                             */
1728 /* --------------------------------------------------------------------- */
1729 
get_cc(sljit_s32 type)1730 static sljit_uw get_cc(sljit_s32 type)
1731 {
1732 	switch (type) {
1733 	case SLJIT_EQUAL:
1734 	case SLJIT_MUL_NOT_OVERFLOW:
1735 	case SLJIT_EQUAL_F64:
1736 		return 0x0;
1737 
1738 	case SLJIT_NOT_EQUAL:
1739 	case SLJIT_MUL_OVERFLOW:
1740 	case SLJIT_NOT_EQUAL_F64:
1741 		return 0x1;
1742 
1743 	case SLJIT_LESS:
1744 	case SLJIT_LESS_F64:
1745 		return 0x3;
1746 
1747 	case SLJIT_GREATER_EQUAL:
1748 	case SLJIT_GREATER_EQUAL_F64:
1749 		return 0x2;
1750 
1751 	case SLJIT_GREATER:
1752 	case SLJIT_GREATER_F64:
1753 		return 0x8;
1754 
1755 	case SLJIT_LESS_EQUAL:
1756 	case SLJIT_LESS_EQUAL_F64:
1757 		return 0x9;
1758 
1759 	case SLJIT_SIG_LESS:
1760 		return 0xb;
1761 
1762 	case SLJIT_SIG_GREATER_EQUAL:
1763 		return 0xa;
1764 
1765 	case SLJIT_SIG_GREATER:
1766 		return 0xc;
1767 
1768 	case SLJIT_SIG_LESS_EQUAL:
1769 		return 0xd;
1770 
1771 	case SLJIT_OVERFLOW:
1772 	case SLJIT_UNORDERED_F64:
1773 		return 0x6;
1774 
1775 	case SLJIT_NOT_OVERFLOW:
1776 	case SLJIT_ORDERED_F64:
1777 		return 0x7;
1778 
1779 	default: /* SLJIT_JUMP */
1780 		SLJIT_UNREACHABLE();
1781 		return 0xe;
1782 	}
1783 }
1784 
sljit_emit_label(struct sljit_compiler * compiler)1785 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler)
1786 {
1787 	struct sljit_label *label;
1788 
1789 	CHECK_ERROR_PTR();
1790 	CHECK_PTR(check_sljit_emit_label(compiler));
1791 
1792 	if (compiler->last_label && compiler->last_label->size == compiler->size)
1793 		return compiler->last_label;
1794 
1795 	label = (struct sljit_label*)ensure_abuf(compiler, sizeof(struct sljit_label));
1796 	PTR_FAIL_IF(!label);
1797 	set_label(label, compiler);
1798 	return label;
1799 }
1800 
sljit_emit_jump(struct sljit_compiler * compiler,sljit_s32 type)1801 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, sljit_s32 type)
1802 {
1803 	struct sljit_jump *jump;
1804 	sljit_ins cc;
1805 
1806 	CHECK_ERROR_PTR();
1807 	CHECK_PTR(check_sljit_emit_jump(compiler, type));
1808 
1809 	jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
1810 	PTR_FAIL_IF(!jump);
1811 	set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
1812 	type &= 0xff;
1813 
1814 	PTR_FAIL_IF(emit_imm32_const(compiler, TMP_REG1, 0));
1815 	if (type < SLJIT_JUMP) {
1816 		jump->flags |= IS_COND;
1817 		cc = get_cc(type);
1818 		jump->flags |= cc << 8;
1819 		PTR_FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
1820 	}
1821 
1822 	jump->addr = compiler->size;
1823 	if (type <= SLJIT_JUMP)
1824 		PTR_FAIL_IF(push_inst16(compiler, BX | RN3(TMP_REG1)));
1825 	else {
1826 		jump->flags |= IS_BL;
1827 		PTR_FAIL_IF(push_inst16(compiler, BLX | RN3(TMP_REG1)));
1828 	}
1829 
1830 	return jump;
1831 }
1832 
1833 #ifdef __SOFTFP__
1834 
softfloat_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types,sljit_s32 * src)1835 static sljit_s32 softfloat_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types, sljit_s32 *src)
1836 {
1837 	sljit_s32 stack_offset = 0;
1838 	sljit_s32 arg_count = 0;
1839 	sljit_s32 word_arg_offset = 0;
1840 	sljit_s32 float_arg_count = 0;
1841 	sljit_s32 types = 0;
1842 	sljit_s32 src_offset = 4 * sizeof(sljit_sw);
1843 	sljit_u8 offsets[4];
1844 
1845 	if (src && FAST_IS_REG(*src))
1846 		src_offset = reg_map[*src] * sizeof(sljit_sw);
1847 
1848 	arg_types >>= SLJIT_DEF_SHIFT;
1849 
1850 	while (arg_types) {
1851 		types = (types << SLJIT_DEF_SHIFT) | (arg_types & SLJIT_DEF_MASK);
1852 
1853 		switch (arg_types & SLJIT_DEF_MASK) {
1854 		case SLJIT_ARG_TYPE_F32:
1855 			offsets[arg_count] = (sljit_u8)stack_offset;
1856 			stack_offset += sizeof(sljit_f32);
1857 			arg_count++;
1858 			float_arg_count++;
1859 			break;
1860 		case SLJIT_ARG_TYPE_F64:
1861 			if (stack_offset & 0x7)
1862 				stack_offset += sizeof(sljit_sw);
1863 			offsets[arg_count] = (sljit_u8)stack_offset;
1864 			stack_offset += sizeof(sljit_f64);
1865 			arg_count++;
1866 			float_arg_count++;
1867 			break;
1868 		default:
1869 			offsets[arg_count] = (sljit_u8)stack_offset;
1870 			stack_offset += sizeof(sljit_sw);
1871 			arg_count++;
1872 			word_arg_offset += sizeof(sljit_sw);
1873 			break;
1874 		}
1875 
1876 		arg_types >>= SLJIT_DEF_SHIFT;
1877 	}
1878 
1879 	if (stack_offset > 16)
1880 		FAIL_IF(push_inst16(compiler, SUB_SP | (((stack_offset - 16) + 0x7) & ~0x7) >> 2));
1881 
1882 	SLJIT_ASSERT(reg_map[TMP_REG1] == 12);
1883 
1884 	/* Process arguments in reversed direction. */
1885 	while (types) {
1886 		switch (types & SLJIT_DEF_MASK) {
1887 		case SLJIT_ARG_TYPE_F32:
1888 			arg_count--;
1889 			float_arg_count--;
1890 			stack_offset = offsets[arg_count];
1891 
1892 			if (stack_offset < 16) {
1893 				if (src_offset == stack_offset) {
1894 					FAIL_IF(push_inst16(compiler, MOV | (src_offset << 1) | 4 | (1 << 7)));
1895 					*src = TMP_REG1;
1896 				}
1897 				FAIL_IF(push_inst32(compiler, VMOV | 0x100000 | (float_arg_count << 16) | (stack_offset << 10)));
1898 			} else
1899 				FAIL_IF(push_inst32(compiler, VSTR_F32 | 0x800000 | RN4(SLJIT_SP) | (float_arg_count << 12) | ((stack_offset - 16) >> 2)));
1900 			break;
1901 		case SLJIT_ARG_TYPE_F64:
1902 			arg_count--;
1903 			float_arg_count--;
1904 			stack_offset = offsets[arg_count];
1905 
1906 			SLJIT_ASSERT((stack_offset & 0x7) == 0);
1907 
1908 			if (stack_offset < 16) {
1909 				if (src_offset == stack_offset || src_offset == stack_offset + sizeof(sljit_sw)) {
1910 					FAIL_IF(push_inst16(compiler, MOV | (src_offset << 1) | 4 | (1 << 7)));
1911 					*src = TMP_REG1;
1912 				}
1913 				FAIL_IF(push_inst32(compiler, VMOV2 | 0x100000 | (stack_offset << 10) | ((stack_offset + sizeof(sljit_sw)) << 14) | float_arg_count));
1914 			} else
1915 				FAIL_IF(push_inst32(compiler, VSTR_F32 | 0x800100 | RN4(SLJIT_SP) | (float_arg_count << 12) | ((stack_offset - 16) >> 2)));
1916 			break;
1917 		default:
1918 			arg_count--;
1919 			word_arg_offset -= sizeof(sljit_sw);
1920 			stack_offset = offsets[arg_count];
1921 
1922 			SLJIT_ASSERT(stack_offset >= word_arg_offset);
1923 
1924 			if (stack_offset != word_arg_offset) {
1925 				if (stack_offset < 16) {
1926 					if (src_offset == stack_offset) {
1927 						FAIL_IF(push_inst16(compiler, MOV | (src_offset << 1) | 4 | (1 << 7)));
1928 						*src = TMP_REG1;
1929 					}
1930 					else if (src_offset == word_arg_offset) {
1931 						*src = 1 + (stack_offset >> 2);
1932 						src_offset = stack_offset;
1933 					}
1934 					FAIL_IF(push_inst16(compiler, MOV | (stack_offset >> 2) | (word_arg_offset << 1)));
1935 				} else
1936 					FAIL_IF(push_inst16(compiler, STR_SP | (word_arg_offset << 6) | ((stack_offset - 16) >> 2)));
1937 			}
1938 			break;
1939 		}
1940 
1941 		types >>= SLJIT_DEF_SHIFT;
1942 	}
1943 
1944 	return SLJIT_SUCCESS;
1945 }
1946 
softfloat_post_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types)1947 static sljit_s32 softfloat_post_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
1948 {
1949 	sljit_s32 stack_size = 0;
1950 
1951 	if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32)
1952 		FAIL_IF(push_inst32(compiler, VMOV | (0 << 16) | (0 << 12)));
1953 	if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F64)
1954 		FAIL_IF(push_inst32(compiler, VMOV2 | (1 << 16) | (0 << 12) | 0));
1955 
1956 	arg_types >>= SLJIT_DEF_SHIFT;
1957 
1958 	while (arg_types) {
1959 		switch (arg_types & SLJIT_DEF_MASK) {
1960 		case SLJIT_ARG_TYPE_F32:
1961 			stack_size += sizeof(sljit_f32);
1962 			break;
1963 		case SLJIT_ARG_TYPE_F64:
1964 			if (stack_size & 0x7)
1965 				stack_size += sizeof(sljit_sw);
1966 			stack_size += sizeof(sljit_f64);
1967 			break;
1968 		default:
1969 			stack_size += sizeof(sljit_sw);
1970 			break;
1971 		}
1972 
1973 		arg_types >>= SLJIT_DEF_SHIFT;
1974 	}
1975 
1976 	if (stack_size <= 16)
1977 		return SLJIT_SUCCESS;
1978 
1979 	return push_inst16(compiler, ADD_SP | ((((stack_size - 16) + 0x7) & ~0x7) >> 2));
1980 }
1981 
1982 #else
1983 
hardfloat_call_with_args(struct sljit_compiler * compiler,sljit_s32 arg_types)1984 static sljit_s32 hardfloat_call_with_args(struct sljit_compiler *compiler, sljit_s32 arg_types)
1985 {
1986 	sljit_u32 remap = 0;
1987 	sljit_u32 offset = 0;
1988 	sljit_u32 new_offset, mask;
1989 
1990 	/* Remove return value. */
1991 	arg_types >>= SLJIT_DEF_SHIFT;
1992 
1993 	while (arg_types) {
1994 		if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F32) {
1995 			new_offset = 0;
1996 			mask = 1;
1997 
1998 			while (remap & mask) {
1999 				new_offset++;
2000 				mask <<= 1;
2001 			}
2002 			remap |= mask;
2003 
2004 			if (offset != new_offset)
2005 				FAIL_IF(push_inst32(compiler, VMOV_F32 | DD4((new_offset >> 1) + 1)
2006 					| ((new_offset & 0x1) ? 0x400000 : 0) | DM4((offset >> 1) + 1)));
2007 
2008 			offset += 2;
2009 		}
2010 		else if ((arg_types & SLJIT_DEF_MASK) == SLJIT_ARG_TYPE_F64) {
2011 			new_offset = 0;
2012 			mask = 3;
2013 
2014 			while (remap & mask) {
2015 				new_offset += 2;
2016 				mask <<= 2;
2017 			}
2018 			remap |= mask;
2019 
2020 			if (offset != new_offset)
2021 				FAIL_IF(push_inst32(compiler, VMOV_F32 | SLJIT_F32_OP | DD4((new_offset >> 1) + 1) | DM4((offset >> 1) + 1)));
2022 
2023 			offset += 2;
2024 		}
2025 		arg_types >>= SLJIT_DEF_SHIFT;
2026 	}
2027 
2028 	return SLJIT_SUCCESS;
2029 }
2030 
2031 #endif
2032 
sljit_emit_call(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types)2033 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_call(struct sljit_compiler *compiler, sljit_s32 type,
2034 	sljit_s32 arg_types)
2035 {
2036 #ifdef __SOFTFP__
2037 	struct sljit_jump *jump;
2038 #endif
2039 
2040 	CHECK_ERROR_PTR();
2041 	CHECK_PTR(check_sljit_emit_call(compiler, type, arg_types));
2042 
2043 #ifdef __SOFTFP__
2044 	PTR_FAIL_IF(softfloat_call_with_args(compiler, arg_types, NULL));
2045 
2046 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2047 		|| (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2048 	compiler->skip_checks = 1;
2049 #endif
2050 
2051 	jump = sljit_emit_jump(compiler, type);
2052 	PTR_FAIL_IF(jump == NULL);
2053 
2054 	PTR_FAIL_IF(softfloat_post_call_with_args(compiler, arg_types));
2055 	return jump;
2056 #else
2057 	PTR_FAIL_IF(hardfloat_call_with_args(compiler, arg_types));
2058 
2059 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2060 		|| (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2061 	compiler->skip_checks = 1;
2062 #endif
2063 
2064 	return sljit_emit_jump(compiler, type);
2065 #endif
2066 }
2067 
sljit_emit_ijump(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 src,sljit_sw srcw)2068 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_ijump(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 src, sljit_sw srcw)
2069 {
2070 	struct sljit_jump *jump;
2071 
2072 	CHECK_ERROR();
2073 	CHECK(check_sljit_emit_ijump(compiler, type, src, srcw));
2074 	ADJUST_LOCAL_OFFSET(src, srcw);
2075 
2076 	SLJIT_ASSERT(reg_map[TMP_REG1] != 14);
2077 
2078 	if (!(src & SLJIT_IMM)) {
2079 		if (FAST_IS_REG(src)) {
2080 			SLJIT_ASSERT(reg_map[src] != 14);
2081 			return push_inst16(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RN3(src));
2082 		}
2083 
2084 		FAIL_IF(emit_op_mem(compiler, WORD_SIZE, type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, src, srcw, TMP_REG1));
2085 		if (type >= SLJIT_FAST_CALL)
2086 			return push_inst16(compiler, BLX | RN3(TMP_REG1));
2087 	}
2088 
2089 	/* These jumps are converted to jump/call instructions when possible. */
2090 	jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
2091 	FAIL_IF(!jump);
2092 	set_jump(jump, compiler, JUMP_ADDR | ((type >= SLJIT_FAST_CALL) ? IS_BL : 0));
2093 	jump->u.target = srcw;
2094 
2095 	FAIL_IF(emit_imm32_const(compiler, TMP_REG1, 0));
2096 	jump->addr = compiler->size;
2097 	return push_inst16(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RN3(TMP_REG1));
2098 }
2099 
sljit_emit_icall(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 arg_types,sljit_s32 src,sljit_sw srcw)2100 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_icall(struct sljit_compiler *compiler, sljit_s32 type,
2101 	sljit_s32 arg_types,
2102 	sljit_s32 src, sljit_sw srcw)
2103 {
2104 	CHECK_ERROR();
2105 	CHECK(check_sljit_emit_icall(compiler, type, arg_types, src, srcw));
2106 
2107 #ifdef __SOFTFP__
2108 	if (src & SLJIT_MEM) {
2109 		FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, src, srcw, TMP_REG1));
2110 		src = TMP_REG1;
2111 	}
2112 
2113 	FAIL_IF(softfloat_call_with_args(compiler, arg_types, &src));
2114 
2115 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2116 		|| (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2117 	compiler->skip_checks = 1;
2118 #endif
2119 
2120 	FAIL_IF(sljit_emit_ijump(compiler, type, src, srcw));
2121 
2122 	return softfloat_post_call_with_args(compiler, arg_types);
2123 #else /* !__SOFTFP__ */
2124 	FAIL_IF(hardfloat_call_with_args(compiler, arg_types));
2125 
2126 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
2127 		|| (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
2128 	compiler->skip_checks = 1;
2129 #endif
2130 
2131 	return sljit_emit_ijump(compiler, type, src, srcw);
2132 #endif /* __SOFTFP__ */
2133 }
2134 
sljit_emit_op_flags(struct sljit_compiler * compiler,sljit_s32 op,sljit_s32 dst,sljit_sw dstw,sljit_s32 type)2135 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_flags(struct sljit_compiler *compiler, sljit_s32 op,
2136 	sljit_s32 dst, sljit_sw dstw,
2137 	sljit_s32 type)
2138 {
2139 	sljit_s32 dst_r, flags = GET_ALL_FLAGS(op);
2140 	sljit_ins cc;
2141 
2142 	CHECK_ERROR();
2143 	CHECK(check_sljit_emit_op_flags(compiler, op, dst, dstw, type));
2144 	ADJUST_LOCAL_OFFSET(dst, dstw);
2145 
2146 	op = GET_OPCODE(op);
2147 	cc = get_cc(type & 0xff);
2148 	dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
2149 
2150 	if (op < SLJIT_ADD) {
2151 		FAIL_IF(push_inst16(compiler, IT | (cc << 4) | (((cc & 0x1) ^ 0x1) << 3) | 0x4));
2152 		if (reg_map[dst_r] > 7) {
2153 			FAIL_IF(push_inst32(compiler, MOV_WI | RD4(dst_r) | 1));
2154 			FAIL_IF(push_inst32(compiler, MOV_WI | RD4(dst_r) | 0));
2155 		} else {
2156 			/* The movsi (immediate) instruction does not set flags in IT block. */
2157 			FAIL_IF(push_inst16(compiler, MOVSI | RDN3(dst_r) | 1));
2158 			FAIL_IF(push_inst16(compiler, MOVSI | RDN3(dst_r) | 0));
2159 		}
2160 		if (!(dst & SLJIT_MEM))
2161 			return SLJIT_SUCCESS;
2162 		return emit_op_mem(compiler, WORD_SIZE | STORE, TMP_REG1, dst, dstw, TMP_REG2);
2163 	}
2164 
2165 	if (dst & SLJIT_MEM)
2166 		FAIL_IF(emit_op_mem(compiler, WORD_SIZE, TMP_REG1, dst, dstw, TMP_REG2));
2167 
2168 	if (op == SLJIT_AND) {
2169 		FAIL_IF(push_inst16(compiler, IT | (cc << 4) | (((cc & 0x1) ^ 0x1) << 3) | 0x4));
2170 		FAIL_IF(push_inst32(compiler, ANDI | RN4(dst_r) | RD4(dst_r) | 1));
2171 		FAIL_IF(push_inst32(compiler, ANDI | RN4(dst_r) | RD4(dst_r) | 0));
2172 	}
2173 	else {
2174 		FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
2175 		FAIL_IF(push_inst32(compiler, ((op == SLJIT_OR) ? ORRI : EORI) | RN4(dst_r) | RD4(dst_r) | 1));
2176 	}
2177 
2178 	if (dst & SLJIT_MEM)
2179 		FAIL_IF(emit_op_mem(compiler, WORD_SIZE | STORE, TMP_REG1, dst, dstw, TMP_REG2));
2180 
2181 	if (!(flags & SLJIT_SET_Z))
2182 		return SLJIT_SUCCESS;
2183 
2184 	/* The condition must always be set, even if the ORR/EORI is not executed above. */
2185 	return push_inst32(compiler, MOV_W | SET_FLAGS | RD4(TMP_REG1) | RM4(dst_r));
2186 }
2187 
sljit_emit_cmov(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 dst_reg,sljit_s32 src,sljit_sw srcw)2188 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_cmov(struct sljit_compiler *compiler, sljit_s32 type,
2189 	sljit_s32 dst_reg,
2190 	sljit_s32 src, sljit_sw srcw)
2191 {
2192 	sljit_uw cc, tmp;
2193 
2194 	CHECK_ERROR();
2195 	CHECK(check_sljit_emit_cmov(compiler, type, dst_reg, src, srcw));
2196 
2197 	dst_reg &= ~SLJIT_I32_OP;
2198 
2199 	cc = get_cc(type & 0xff);
2200 
2201 	if (!(src & SLJIT_IMM)) {
2202 		FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
2203 		return push_inst16(compiler, MOV | SET_REGS44(dst_reg, src));
2204 	}
2205 
2206 	tmp = (sljit_uw) srcw;
2207 
2208 	if (tmp < 0x10000) {
2209 		/* set low 16 bits, set hi 16 bits to 0. */
2210 		FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
2211 		return push_inst32(compiler, MOVW | RD4(dst_reg)
2212 			| COPY_BITS(tmp, 12, 16, 4) | COPY_BITS(tmp, 11, 26, 1) | COPY_BITS(tmp, 8, 12, 3) | (tmp & 0xff));
2213 	}
2214 
2215 	tmp = get_imm(srcw);
2216 	if (tmp != INVALID_IMM) {
2217 		FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
2218 		return push_inst32(compiler, MOV_WI | RD4(dst_reg) | tmp);
2219 	}
2220 
2221 	tmp = get_imm(~srcw);
2222 	if (tmp != INVALID_IMM) {
2223 		FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
2224 		return push_inst32(compiler, MVN_WI | RD4(dst_reg) | tmp);
2225 	}
2226 
2227 	FAIL_IF(push_inst16(compiler, IT | (cc << 4) | ((cc & 0x1) << 3) | 0x4));
2228 
2229 	tmp = (sljit_uw) srcw;
2230 	FAIL_IF(push_inst32(compiler, MOVW | RD4(dst_reg)
2231 		| COPY_BITS(tmp, 12, 16, 4) | COPY_BITS(tmp, 11, 26, 1) | COPY_BITS(tmp, 8, 12, 3) | (tmp & 0xff)));
2232 	return push_inst32(compiler, MOVT | RD4(dst_reg)
2233 		| COPY_BITS(tmp, 12 + 16, 16, 4) | COPY_BITS(tmp, 11 + 16, 26, 1) | COPY_BITS(tmp, 8 + 16, 12, 3) | ((tmp & 0xff0000) >> 16));
2234 }
2235 
sljit_emit_mem(struct sljit_compiler * compiler,sljit_s32 type,sljit_s32 reg,sljit_s32 mem,sljit_sw memw)2236 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_mem(struct sljit_compiler *compiler, sljit_s32 type,
2237 	sljit_s32 reg,
2238 	sljit_s32 mem, sljit_sw memw)
2239 {
2240 	sljit_s32 flags;
2241 	sljit_ins inst;
2242 
2243 	CHECK_ERROR();
2244 	CHECK(check_sljit_emit_mem(compiler, type, reg, mem, memw));
2245 
2246 	if ((mem & OFFS_REG_MASK) || (memw > 255 && memw < -255))
2247 		return SLJIT_ERR_UNSUPPORTED;
2248 
2249 	if (type & SLJIT_MEM_SUPP)
2250 		return SLJIT_SUCCESS;
2251 
2252 	switch (type & 0xff) {
2253 	case SLJIT_MOV:
2254 	case SLJIT_MOV_U32:
2255 	case SLJIT_MOV_S32:
2256 	case SLJIT_MOV_P:
2257 		flags = WORD_SIZE;
2258 		break;
2259 	case SLJIT_MOV_U8:
2260 		flags = BYTE_SIZE;
2261 		break;
2262 	case SLJIT_MOV_S8:
2263 		flags = BYTE_SIZE | SIGNED;
2264 		break;
2265 	case SLJIT_MOV_U16:
2266 		flags = HALF_SIZE;
2267 		break;
2268 	case SLJIT_MOV_S16:
2269 		flags = HALF_SIZE | SIGNED;
2270 		break;
2271 	default:
2272 		SLJIT_UNREACHABLE();
2273 		flags = WORD_SIZE;
2274 		break;
2275 	}
2276 
2277 	if (type & SLJIT_MEM_STORE)
2278 		flags |= STORE;
2279 
2280 	inst = sljit_mem32[flags] | 0x900;
2281 
2282 	if (type & SLJIT_MEM_PRE)
2283 		inst |= 0x400;
2284 
2285 	if (memw >= 0)
2286 		inst |= 0x200;
2287 	else
2288 		memw = -memw;
2289 
2290 	return push_inst32(compiler, inst | RT4(reg) | RN4(mem & REG_MASK) | memw);
2291 }
2292 
sljit_emit_const(struct sljit_compiler * compiler,sljit_s32 dst,sljit_sw dstw,sljit_sw init_value)2293 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw, sljit_sw init_value)
2294 {
2295 	struct sljit_const *const_;
2296 	sljit_s32 dst_r;
2297 
2298 	CHECK_ERROR_PTR();
2299 	CHECK_PTR(check_sljit_emit_const(compiler, dst, dstw, init_value));
2300 	ADJUST_LOCAL_OFFSET(dst, dstw);
2301 
2302 	const_ = (struct sljit_const*)ensure_abuf(compiler, sizeof(struct sljit_const));
2303 	PTR_FAIL_IF(!const_);
2304 	set_const(const_, compiler);
2305 
2306 	dst_r = FAST_IS_REG(dst) ? dst : TMP_REG1;
2307 	PTR_FAIL_IF(emit_imm32_const(compiler, dst_r, init_value));
2308 
2309 	if (dst & SLJIT_MEM)
2310 		PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE | STORE, dst_r, dst, dstw, TMP_REG2));
2311 	return const_;
2312 }
2313 
sljit_set_jump_addr(sljit_uw addr,sljit_uw new_target,sljit_sw executable_offset)2314 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_target, sljit_sw executable_offset)
2315 {
2316 	sljit_u16 *inst = (sljit_u16*)addr;
2317 	modify_imm32_const(inst, new_target);
2318 	inst = (sljit_u16 *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
2319 	SLJIT_CACHE_FLUSH(inst, inst + 4);
2320 }
2321 
sljit_set_const(sljit_uw addr,sljit_sw new_constant,sljit_sw executable_offset)2322 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant, sljit_sw executable_offset)
2323 {
2324 	sljit_u16 *inst = (sljit_u16*)addr;
2325 	modify_imm32_const(inst, new_constant);
2326 	inst = (sljit_u16 *)SLJIT_ADD_EXEC_OFFSET(inst, executable_offset);
2327 	SLJIT_CACHE_FLUSH(inst, inst + 4);
2328 }
2329