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Commit upstream pcre-8.39.tar.bz2
[pcre3.git] / sljit / sljitNativeARM_T2_32.c
1 /*
2  *    Stack-less Just-In-Time compiler
3  *
4  *    Copyright 2009-2012 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without modification, are
7  * permitted provided that the following conditions are met:
8  *
9  *   1. Redistributions of source code must retain the above copyright notice, this list of
10  *      conditions and the following disclaimer.
11  *
12  *   2. Redistributions in binary form must reproduce the above copyright notice, this list
13  *      of conditions and the following disclaimer in the documentation and/or other materials
14  *      provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19  * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
21  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26
27 SLJIT_API_FUNC_ATTRIBUTE const char* sljit_get_platform_name(void)
28 {
29         return "ARM-Thumb2" SLJIT_CPUINFO;
30 }
31
32 /* Length of an instruction word. */
33 typedef sljit_u32 sljit_ins;
34
35 /* Last register + 1. */
36 #define TMP_REG1        (SLJIT_NUMBER_OF_REGISTERS + 2)
37 #define TMP_REG2        (SLJIT_NUMBER_OF_REGISTERS + 3)
38 #define TMP_REG3        (SLJIT_NUMBER_OF_REGISTERS + 4)
39 #define TMP_PC          (SLJIT_NUMBER_OF_REGISTERS + 5)
40
41 #define TMP_FREG1       (0)
42 #define TMP_FREG2       (SLJIT_NUMBER_OF_FLOAT_REGISTERS + 1)
43
44 /* See sljit_emit_enter and sljit_emit_op0 if you want to change them. */
45 static const sljit_u8 reg_map[SLJIT_NUMBER_OF_REGISTERS + 6] = {
46         0, 0, 1, 2, 12, 11, 10, 9, 8, 7, 6, 5, 13, 3, 4, 14, 15
47 };
48
49 #define COPY_BITS(src, from, to, bits) \
50         ((from >= to ? (src >> (from - to)) : (src << (to - from))) & (((1 << bits) - 1) << to))
51
52 /* Thumb16 encodings. */
53 #define RD3(rd) (reg_map[rd])
54 #define RN3(rn) (reg_map[rn] << 3)
55 #define RM3(rm) (reg_map[rm] << 6)
56 #define RDN3(rdn) (reg_map[rdn] << 8)
57 #define IMM3(imm) (imm << 6)
58 #define IMM8(imm) (imm)
59
60 /* Thumb16 helpers. */
61 #define SET_REGS44(rd, rn) \
62         ((reg_map[rn] << 3) | (reg_map[rd] & 0x7) | ((reg_map[rd] & 0x8) << 4))
63 #define IS_2_LO_REGS(reg1, reg2) \
64         (reg_map[reg1] <= 7 && reg_map[reg2] <= 7)
65 #define IS_3_LO_REGS(reg1, reg2, reg3) \
66         (reg_map[reg1] <= 7 && reg_map[reg2] <= 7 && reg_map[reg3] <= 7)
67
68 /* Thumb32 encodings. */
69 #define RD4(rd) (reg_map[rd] << 8)
70 #define RN4(rn) (reg_map[rn] << 16)
71 #define RM4(rm) (reg_map[rm])
72 #define RT4(rt) (reg_map[rt] << 12)
73 #define DD4(dd) ((dd) << 12)
74 #define DN4(dn) ((dn) << 16)
75 #define DM4(dm) (dm)
76 #define IMM5(imm) \
77         (COPY_BITS(imm, 2, 12, 3) | ((imm & 0x3) << 6))
78 #define IMM12(imm) \
79         (COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff))
80
81 /* --------------------------------------------------------------------- */
82 /*  Instrucion forms                                                     */
83 /* --------------------------------------------------------------------- */
84
85 /* dot '.' changed to _
86    I immediate form (possibly followed by number of immediate bits). */
87 #define ADCI            0xf1400000
88 #define ADCS            0x4140
89 #define ADC_W           0xeb400000
90 #define ADD             0x4400
91 #define ADDS            0x1800
92 #define ADDSI3          0x1c00
93 #define ADDSI8          0x3000
94 #define ADD_W           0xeb000000
95 #define ADDWI           0xf2000000
96 #define ADD_SP          0xb000
97 #define ADD_W           0xeb000000
98 #define ADD_WI          0xf1000000
99 #define ANDI            0xf0000000
100 #define ANDS            0x4000
101 #define AND_W           0xea000000
102 #define ASRS            0x4100
103 #define ASRSI           0x1000
104 #define ASR_W           0xfa40f000
105 #define ASR_WI          0xea4f0020
106 #define BICI            0xf0200000
107 #define BKPT            0xbe00
108 #define BLX             0x4780
109 #define BX              0x4700
110 #define CLZ             0xfab0f080
111 #define CMPI            0x2800
112 #define CMP_W           0xebb00f00
113 #define EORI            0xf0800000
114 #define EORS            0x4040
115 #define EOR_W           0xea800000
116 #define IT              0xbf00
117 #define LSLS            0x4080
118 #define LSLSI           0x0000
119 #define LSL_W           0xfa00f000
120 #define LSL_WI          0xea4f0000
121 #define LSRS            0x40c0
122 #define LSRSI           0x0800
123 #define LSR_W           0xfa20f000
124 #define LSR_WI          0xea4f0010
125 #define MOV             0x4600
126 #define MOVS            0x0000
127 #define MOVSI           0x2000
128 #define MOVT            0xf2c00000
129 #define MOVW            0xf2400000
130 #define MOV_W           0xea4f0000
131 #define MOV_WI          0xf04f0000
132 #define MUL             0xfb00f000
133 #define MVNS            0x43c0
134 #define MVN_W           0xea6f0000
135 #define MVN_WI          0xf06f0000
136 #define NOP             0xbf00
137 #define ORNI            0xf0600000
138 #define ORRI            0xf0400000
139 #define ORRS            0x4300
140 #define ORR_W           0xea400000
141 #define POP             0xbc00
142 #define POP_W           0xe8bd0000
143 #define PUSH            0xb400
144 #define PUSH_W          0xe92d0000
145 #define RSB_WI          0xf1c00000
146 #define RSBSI           0x4240
147 #define SBCI            0xf1600000
148 #define SBCS            0x4180
149 #define SBC_W           0xeb600000
150 #define SMULL           0xfb800000
151 #define STR_SP          0x9000
152 #define SUBS            0x1a00
153 #define SUBSI3          0x1e00
154 #define SUBSI8          0x3800
155 #define SUB_W           0xeba00000
156 #define SUBWI           0xf2a00000
157 #define SUB_SP          0xb080
158 #define SUB_WI          0xf1a00000
159 #define SXTB            0xb240
160 #define SXTB_W          0xfa4ff080
161 #define SXTH            0xb200
162 #define SXTH_W          0xfa0ff080
163 #define TST             0x4200
164 #define UMULL           0xfba00000
165 #define UXTB            0xb2c0
166 #define UXTB_W          0xfa5ff080
167 #define UXTH            0xb280
168 #define UXTH_W          0xfa1ff080
169 #define VABS_F32        0xeeb00ac0
170 #define VADD_F32        0xee300a00
171 #define VCMP_F32        0xeeb40a40
172 #define VCVT_F32_S32    0xeeb80ac0
173 #define VCVT_F64_F32    0xeeb70ac0
174 #define VCVT_S32_F32    0xeebd0ac0
175 #define VDIV_F32        0xee800a00
176 #define VMOV_F32        0xeeb00a40
177 #define VMOV            0xee000a10
178 #define VMRS            0xeef1fa10
179 #define VMUL_F32        0xee200a00
180 #define VNEG_F32        0xeeb10a40
181 #define VSTR_F32        0xed000a00
182 #define VSUB_F32        0xee300a40
183
184 static sljit_s32 push_inst16(struct sljit_compiler *compiler, sljit_ins inst)
185 {
186         sljit_u16 *ptr;
187         SLJIT_ASSERT(!(inst & 0xffff0000));
188
189         ptr = (sljit_u16*)ensure_buf(compiler, sizeof(sljit_u16));
190         FAIL_IF(!ptr);
191         *ptr = inst;
192         compiler->size++;
193         return SLJIT_SUCCESS;
194 }
195
196 static sljit_s32 push_inst32(struct sljit_compiler *compiler, sljit_ins inst)
197 {
198         sljit_u16 *ptr = (sljit_u16*)ensure_buf(compiler, sizeof(sljit_ins));
199         FAIL_IF(!ptr);
200         *ptr++ = inst >> 16;
201         *ptr = inst;
202         compiler->size += 2;
203         return SLJIT_SUCCESS;
204 }
205
206 static SLJIT_INLINE sljit_s32 emit_imm32_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_uw imm)
207 {
208         FAIL_IF(push_inst32(compiler, MOVW | RD4(dst) |
209                 COPY_BITS(imm, 12, 16, 4) | COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff)));
210         return push_inst32(compiler, MOVT | RD4(dst) |
211                 COPY_BITS(imm, 12 + 16, 16, 4) | COPY_BITS(imm, 11 + 16, 26, 1) | COPY_BITS(imm, 8 + 16, 12, 3) | ((imm & 0xff0000) >> 16));
212 }
213
214 static SLJIT_INLINE void modify_imm32_const(sljit_u16 *inst, sljit_uw new_imm)
215 {
216         sljit_s32 dst = inst[1] & 0x0f00;
217         SLJIT_ASSERT(((inst[0] & 0xfbf0) == (MOVW >> 16)) && ((inst[2] & 0xfbf0) == (MOVT >> 16)) && dst == (inst[3] & 0x0f00));
218         inst[0] = (MOVW >> 16) | COPY_BITS(new_imm, 12, 0, 4) | COPY_BITS(new_imm, 11, 10, 1);
219         inst[1] = dst | COPY_BITS(new_imm, 8, 12, 3) | (new_imm & 0xff);
220         inst[2] = (MOVT >> 16) | COPY_BITS(new_imm, 12 + 16, 0, 4) | COPY_BITS(new_imm, 11 + 16, 10, 1);
221         inst[3] = dst | COPY_BITS(new_imm, 8 + 16, 12, 3) | ((new_imm & 0xff0000) >> 16);
222 }
223
224 static SLJIT_INLINE sljit_s32 detect_jump_type(struct sljit_jump *jump, sljit_u16 *code_ptr, sljit_u16 *code)
225 {
226         sljit_sw diff;
227
228         if (jump->flags & SLJIT_REWRITABLE_JUMP)
229                 return 0;
230
231         if (jump->flags & JUMP_ADDR) {
232                 /* Branch to ARM code is not optimized yet. */
233                 if (!(jump->u.target & 0x1))
234                         return 0;
235                 diff = ((sljit_sw)jump->u.target - (sljit_sw)(code_ptr + 2)) >> 1;
236         }
237         else {
238                 SLJIT_ASSERT(jump->flags & JUMP_LABEL);
239                 diff = ((sljit_sw)(code + jump->u.label->size) - (sljit_sw)(code_ptr + 2)) >> 1;
240         }
241
242         if (jump->flags & IS_COND) {
243                 SLJIT_ASSERT(!(jump->flags & IS_BL));
244                 if (diff <= 127 && diff >= -128) {
245                         jump->flags |= PATCH_TYPE1;
246                         return 5;
247                 }
248                 if (diff <= 524287 && diff >= -524288) {
249                         jump->flags |= PATCH_TYPE2;
250                         return 4;
251                 }
252                 /* +1 comes from the prefix IT instruction. */
253                 diff--;
254                 if (diff <= 8388607 && diff >= -8388608) {
255                         jump->flags |= PATCH_TYPE3;
256                         return 3;
257                 }
258         }
259         else if (jump->flags & IS_BL) {
260                 if (diff <= 8388607 && diff >= -8388608) {
261                         jump->flags |= PATCH_BL;
262                         return 3;
263                 }
264         }
265         else {
266                 if (diff <= 1023 && diff >= -1024) {
267                         jump->flags |= PATCH_TYPE4;
268                         return 4;
269                 }
270                 if (diff <= 8388607 && diff >= -8388608) {
271                         jump->flags |= PATCH_TYPE5;
272                         return 3;
273                 }
274         }
275
276         return 0;
277 }
278
279 static SLJIT_INLINE void set_jump_instruction(struct sljit_jump *jump)
280 {
281         sljit_s32 type = (jump->flags >> 4) & 0xf;
282         sljit_sw diff;
283         sljit_u16 *jump_inst;
284         sljit_s32 s, j1, j2;
285
286         if (SLJIT_UNLIKELY(type == 0)) {
287                 modify_imm32_const((sljit_u16*)jump->addr, (jump->flags & JUMP_LABEL) ? jump->u.label->addr : jump->u.target);
288                 return;
289         }
290
291         if (jump->flags & JUMP_ADDR) {
292                 SLJIT_ASSERT(jump->u.target & 0x1);
293                 diff = ((sljit_sw)jump->u.target - (sljit_sw)(jump->addr + 4)) >> 1;
294         }
295         else
296                 diff = ((sljit_sw)(jump->u.label->addr) - (sljit_sw)(jump->addr + 4)) >> 1;
297         jump_inst = (sljit_u16*)jump->addr;
298
299         switch (type) {
300         case 1:
301                 /* Encoding T1 of 'B' instruction */
302                 SLJIT_ASSERT(diff <= 127 && diff >= -128 && (jump->flags & IS_COND));
303                 jump_inst[0] = 0xd000 | (jump->flags & 0xf00) | (diff & 0xff);
304                 return;
305         case 2:
306                 /* Encoding T3 of 'B' instruction */
307                 SLJIT_ASSERT(diff <= 524287 && diff >= -524288 && (jump->flags & IS_COND));
308                 jump_inst[0] = 0xf000 | COPY_BITS(jump->flags, 8, 6, 4) | COPY_BITS(diff, 11, 0, 6) | COPY_BITS(diff, 19, 10, 1);
309                 jump_inst[1] = 0x8000 | COPY_BITS(diff, 17, 13, 1) | COPY_BITS(diff, 18, 11, 1) | (diff & 0x7ff);
310                 return;
311         case 3:
312                 SLJIT_ASSERT(jump->flags & IS_COND);
313                 *jump_inst++ = IT | ((jump->flags >> 4) & 0xf0) | 0x8;
314                 diff--;
315                 type = 5;
316                 break;
317         case 4:
318                 /* Encoding T2 of 'B' instruction */
319                 SLJIT_ASSERT(diff <= 1023 && diff >= -1024 && !(jump->flags & IS_COND));
320                 jump_inst[0] = 0xe000 | (diff & 0x7ff);
321                 return;
322         }
323
324         SLJIT_ASSERT(diff <= 8388607 && diff >= -8388608);
325
326         /* Really complex instruction form for branches. */
327         s = (diff >> 23) & 0x1;
328         j1 = (~(diff >> 21) ^ s) & 0x1;
329         j2 = (~(diff >> 22) ^ s) & 0x1;
330         jump_inst[0] = 0xf000 | (s << 10) | COPY_BITS(diff, 11, 0, 10);
331         jump_inst[1] = (j1 << 13) | (j2 << 11) | (diff & 0x7ff);
332
333         /* The others have a common form. */
334         if (type == 5) /* Encoding T4 of 'B' instruction */
335                 jump_inst[1] |= 0x9000;
336         else if (type == 6) /* Encoding T1 of 'BL' instruction */
337                 jump_inst[1] |= 0xd000;
338         else
339                 SLJIT_ASSERT_STOP();
340 }
341
342 SLJIT_API_FUNC_ATTRIBUTE void* sljit_generate_code(struct sljit_compiler *compiler)
343 {
344         struct sljit_memory_fragment *buf;
345         sljit_u16 *code;
346         sljit_u16 *code_ptr;
347         sljit_u16 *buf_ptr;
348         sljit_u16 *buf_end;
349         sljit_uw half_count;
350
351         struct sljit_label *label;
352         struct sljit_jump *jump;
353         struct sljit_const *const_;
354
355         CHECK_ERROR_PTR();
356         CHECK_PTR(check_sljit_generate_code(compiler));
357         reverse_buf(compiler);
358
359         code = (sljit_u16*)SLJIT_MALLOC_EXEC(compiler->size * sizeof(sljit_u16));
360         PTR_FAIL_WITH_EXEC_IF(code);
361         buf = compiler->buf;
362
363         code_ptr = code;
364         half_count = 0;
365         label = compiler->labels;
366         jump = compiler->jumps;
367         const_ = compiler->consts;
368
369         do {
370                 buf_ptr = (sljit_u16*)buf->memory;
371                 buf_end = buf_ptr + (buf->used_size >> 1);
372                 do {
373                         *code_ptr = *buf_ptr++;
374                         /* These structures are ordered by their address. */
375                         SLJIT_ASSERT(!label || label->size >= half_count);
376                         SLJIT_ASSERT(!jump || jump->addr >= half_count);
377                         SLJIT_ASSERT(!const_ || const_->addr >= half_count);
378                         if (label && label->size == half_count) {
379                                 label->addr = ((sljit_uw)code_ptr) | 0x1;
380                                 label->size = code_ptr - code;
381                                 label = label->next;
382                         }
383                         if (jump && jump->addr == half_count) {
384                                         jump->addr = (sljit_uw)code_ptr - ((jump->flags & IS_COND) ? 10 : 8);
385                                         code_ptr -= detect_jump_type(jump, code_ptr, code);
386                                         jump = jump->next;
387                         }
388                         if (const_ && const_->addr == half_count) {
389                                 const_->addr = (sljit_uw)code_ptr;
390                                 const_ = const_->next;
391                         }
392                         code_ptr ++;
393                         half_count ++;
394                 } while (buf_ptr < buf_end);
395
396                 buf = buf->next;
397         } while (buf);
398
399         if (label && label->size == half_count) {
400                 label->addr = ((sljit_uw)code_ptr) | 0x1;
401                 label->size = code_ptr - code;
402                 label = label->next;
403         }
404
405         SLJIT_ASSERT(!label);
406         SLJIT_ASSERT(!jump);
407         SLJIT_ASSERT(!const_);
408         SLJIT_ASSERT(code_ptr - code <= (sljit_sw)compiler->size);
409
410         jump = compiler->jumps;
411         while (jump) {
412                 set_jump_instruction(jump);
413                 jump = jump->next;
414         }
415
416         compiler->error = SLJIT_ERR_COMPILED;
417         compiler->executable_size = (code_ptr - code) * sizeof(sljit_u16);
418         SLJIT_CACHE_FLUSH(code, code_ptr);
419         /* Set thumb mode flag. */
420         return (void*)((sljit_uw)code | 0x1);
421 }
422
423 /* --------------------------------------------------------------------- */
424 /*  Core code generator functions.                                       */
425 /* --------------------------------------------------------------------- */
426
427 #define INVALID_IMM     0x80000000
428 static sljit_uw get_imm(sljit_uw imm)
429 {
430         /* Thumb immediate form. */
431         sljit_s32 counter;
432
433         if (imm <= 0xff)
434                 return imm;
435
436         if ((imm & 0xffff) == (imm >> 16)) {
437                 /* Some special cases. */
438                 if (!(imm & 0xff00))
439                         return (1 << 12) | (imm & 0xff);
440                 if (!(imm & 0xff))
441                         return (2 << 12) | ((imm >> 8) & 0xff);
442                 if ((imm & 0xff00) == ((imm & 0xff) << 8))
443                         return (3 << 12) | (imm & 0xff);
444         }
445
446         /* Assembly optimization: count leading zeroes? */
447         counter = 8;
448         if (!(imm & 0xffff0000)) {
449                 counter += 16;
450                 imm <<= 16;
451         }
452         if (!(imm & 0xff000000)) {
453                 counter += 8;
454                 imm <<= 8;
455         }
456         if (!(imm & 0xf0000000)) {
457                 counter += 4;
458                 imm <<= 4;
459         }
460         if (!(imm & 0xc0000000)) {
461                 counter += 2;
462                 imm <<= 2;
463         }
464         if (!(imm & 0x80000000)) {
465                 counter += 1;
466                 imm <<= 1;
467         }
468         /* Since imm >= 128, this must be true. */
469         SLJIT_ASSERT(counter <= 31);
470
471         if (imm & 0x00ffffff)
472                 return INVALID_IMM; /* Cannot be encoded. */
473
474         return ((imm >> 24) & 0x7f) | COPY_BITS(counter, 4, 26, 1) | COPY_BITS(counter, 1, 12, 3) | COPY_BITS(counter, 0, 7, 1);
475 }
476
477 static sljit_s32 load_immediate(struct sljit_compiler *compiler, sljit_s32 dst, sljit_uw imm)
478 {
479         sljit_uw tmp;
480
481         if (imm >= 0x10000) {
482                 tmp = get_imm(imm);
483                 if (tmp != INVALID_IMM)
484                         return push_inst32(compiler, MOV_WI | RD4(dst) | tmp);
485                 tmp = get_imm(~imm);
486                 if (tmp != INVALID_IMM)
487                         return push_inst32(compiler, MVN_WI | RD4(dst) | tmp);
488         }
489
490         /* set low 16 bits, set hi 16 bits to 0. */
491         FAIL_IF(push_inst32(compiler, MOVW | RD4(dst) |
492                 COPY_BITS(imm, 12, 16, 4) | COPY_BITS(imm, 11, 26, 1) | COPY_BITS(imm, 8, 12, 3) | (imm & 0xff)));
493
494         /* set hi 16 bit if needed. */
495         if (imm >= 0x10000)
496                 return push_inst32(compiler, MOVT | RD4(dst) |
497                         COPY_BITS(imm, 12 + 16, 16, 4) | COPY_BITS(imm, 11 + 16, 26, 1) | COPY_BITS(imm, 8 + 16, 12, 3) | ((imm & 0xff0000) >> 16));
498         return SLJIT_SUCCESS;
499 }
500
501 #define ARG1_IMM        0x0010000
502 #define ARG2_IMM        0x0020000
503 #define KEEP_FLAGS      0x0040000
504 /* SET_FLAGS must be 0x100000 as it is also the value of S bit (can be used for optimization). */
505 #define SET_FLAGS       0x0100000
506 #define UNUSED_RETURN   0x0200000
507 #define SLOW_DEST       0x0400000
508 #define SLOW_SRC1       0x0800000
509 #define SLOW_SRC2       0x1000000
510
511 static sljit_s32 emit_op_imm(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 dst, sljit_uw arg1, sljit_uw arg2)
512 {
513         /* dst must be register, TMP_REG1
514            arg1 must be register, TMP_REG1, imm
515            arg2 must be register, TMP_REG2, imm */
516         sljit_s32 reg;
517         sljit_uw imm, nimm;
518
519         if (SLJIT_UNLIKELY((flags & (ARG1_IMM | ARG2_IMM)) == (ARG1_IMM | ARG2_IMM))) {
520                 /* Both are immediates. */
521                 flags &= ~ARG1_IMM;
522                 FAIL_IF(load_immediate(compiler, TMP_REG1, arg1));
523                 arg1 = TMP_REG1;
524         }
525
526         if (flags & (ARG1_IMM | ARG2_IMM)) {
527                 reg = (flags & ARG2_IMM) ? arg1 : arg2;
528                 imm = (flags & ARG2_IMM) ? arg2 : arg1;
529
530                 switch (flags & 0xffff) {
531                 case SLJIT_CLZ:
532                 case SLJIT_MUL:
533                         /* No form with immediate operand. */
534                         break;
535                 case SLJIT_MOV:
536                         SLJIT_ASSERT(!(flags & SET_FLAGS) && (flags & ARG2_IMM) && arg1 == TMP_REG1);
537                         return load_immediate(compiler, dst, imm);
538                 case SLJIT_NOT:
539                         if (!(flags & SET_FLAGS))
540                                 return load_immediate(compiler, dst, ~imm);
541                         /* Since the flags should be set, we just fallback to the register mode.
542                            Although some clever things could be done here, "NOT IMM" does not worth the efforts. */
543                         break;
544                 case SLJIT_ADD:
545                         nimm = -imm;
546                         if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(reg, dst)) {
547                                 if (imm <= 0x7)
548                                         return push_inst16(compiler, ADDSI3 | IMM3(imm) | RD3(dst) | RN3(reg));
549                                 if (nimm <= 0x7)
550                                         return push_inst16(compiler, SUBSI3 | IMM3(nimm) | RD3(dst) | RN3(reg));
551                                 if (reg == dst) {
552                                         if (imm <= 0xff)
553                                                 return push_inst16(compiler, ADDSI8 | IMM8(imm) | RDN3(dst));
554                                         if (nimm <= 0xff)
555                                                 return push_inst16(compiler, SUBSI8 | IMM8(nimm) | RDN3(dst));
556                                 }
557                         }
558                         if (!(flags & SET_FLAGS)) {
559                                 if (imm <= 0xfff)
560                                         return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(imm));
561                                 if (nimm <= 0xfff)
562                                         return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(nimm));
563                         }
564                         imm = get_imm(imm);
565                         if (imm != INVALID_IMM)
566                                 return push_inst32(compiler, ADD_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
567                         break;
568                 case SLJIT_ADDC:
569                         imm = get_imm(imm);
570                         if (imm != INVALID_IMM)
571                                 return push_inst32(compiler, ADCI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
572                         break;
573                 case SLJIT_SUB:
574                         if (flags & ARG1_IMM) {
575                                 if (!(flags & KEEP_FLAGS) && imm == 0 && IS_2_LO_REGS(reg, dst))
576                                         return push_inst16(compiler, RSBSI | RD3(dst) | RN3(reg));
577                                 imm = get_imm(imm);
578                                 if (imm != INVALID_IMM)
579                                         return push_inst32(compiler, RSB_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
580                                 break;
581                         }
582                         nimm = -imm;
583                         if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(reg, dst)) {
584                                 if (imm <= 0x7)
585                                         return push_inst16(compiler, SUBSI3 | IMM3(imm) | RD3(dst) | RN3(reg));
586                                 if (nimm <= 0x7)
587                                         return push_inst16(compiler, ADDSI3 | IMM3(nimm) | RD3(dst) | RN3(reg));
588                                 if (reg == dst) {
589                                         if (imm <= 0xff)
590                                                 return push_inst16(compiler, SUBSI8 | IMM8(imm) | RDN3(dst));
591                                         if (nimm <= 0xff)
592                                                 return push_inst16(compiler, ADDSI8 | IMM8(nimm) | RDN3(dst));
593                                 }
594                                 if (imm <= 0xff && (flags & UNUSED_RETURN))
595                                         return push_inst16(compiler, CMPI | IMM8(imm) | RDN3(reg));
596                         }
597                         if (!(flags & SET_FLAGS)) {
598                                 if (imm <= 0xfff)
599                                         return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(imm));
600                                 if (nimm <= 0xfff)
601                                         return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(nimm));
602                         }
603                         imm = get_imm(imm);
604                         if (imm != INVALID_IMM)
605                                 return push_inst32(compiler, SUB_WI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
606                         break;
607                 case SLJIT_SUBC:
608                         if (flags & ARG1_IMM)
609                                 break;
610                         imm = get_imm(imm);
611                         if (imm != INVALID_IMM)
612                                 return push_inst32(compiler, SBCI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
613                         break;
614                 case SLJIT_AND:
615                         nimm = get_imm(imm);
616                         if (nimm != INVALID_IMM)
617                                 return push_inst32(compiler, ANDI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
618                         imm = get_imm(imm);
619                         if (imm != INVALID_IMM)
620                                 return push_inst32(compiler, BICI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
621                         break;
622                 case SLJIT_OR:
623                         nimm = get_imm(imm);
624                         if (nimm != INVALID_IMM)
625                                 return push_inst32(compiler, ORRI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | nimm);
626                         imm = get_imm(imm);
627                         if (imm != INVALID_IMM)
628                                 return push_inst32(compiler, ORNI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
629                         break;
630                 case SLJIT_XOR:
631                         imm = get_imm(imm);
632                         if (imm != INVALID_IMM)
633                                 return push_inst32(compiler, EORI | (flags & SET_FLAGS) | RD4(dst) | RN4(reg) | imm);
634                         break;
635                 case SLJIT_SHL:
636                 case SLJIT_LSHR:
637                 case SLJIT_ASHR:
638                         if (flags & ARG1_IMM)
639                                 break;
640                         imm &= 0x1f;
641                         if (imm == 0) {
642                                 if (!(flags & SET_FLAGS))
643                                         return push_inst16(compiler, MOV | SET_REGS44(dst, reg));
644                                 if (IS_2_LO_REGS(dst, reg))
645                                         return push_inst16(compiler, MOVS | RD3(dst) | RN3(reg));
646                                 return push_inst32(compiler, MOV_W | SET_FLAGS | RD4(dst) | RM4(reg));
647                         }
648                         switch (flags & 0xffff) {
649                         case SLJIT_SHL:
650                                 if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, reg))
651                                         return push_inst16(compiler, LSLSI | RD3(dst) | RN3(reg) | (imm << 6));
652                                 return push_inst32(compiler, LSL_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
653                         case SLJIT_LSHR:
654                                 if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, reg))
655                                         return push_inst16(compiler, LSRSI | RD3(dst) | RN3(reg) | (imm << 6));
656                                 return push_inst32(compiler, LSR_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
657                         default: /* SLJIT_ASHR */
658                                 if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, reg))
659                                         return push_inst16(compiler, ASRSI | RD3(dst) | RN3(reg) | (imm << 6));
660                                 return push_inst32(compiler, ASR_WI | (flags & SET_FLAGS) | RD4(dst) | RM4(reg) | IMM5(imm));
661                         }
662                 default:
663                         SLJIT_ASSERT_STOP();
664                         break;
665                 }
666
667                 if (flags & ARG2_IMM) {
668                         FAIL_IF(load_immediate(compiler, TMP_REG2, arg2));
669                         arg2 = TMP_REG2;
670                 }
671                 else {
672                         FAIL_IF(load_immediate(compiler, TMP_REG1, arg1));
673                         arg1 = TMP_REG1;
674                 }
675         }
676
677         /* Both arguments are registers. */
678         switch (flags & 0xffff) {
679         case SLJIT_MOV:
680         case SLJIT_MOV_U32:
681         case SLJIT_MOV_S32:
682         case SLJIT_MOV_P:
683         case SLJIT_MOVU:
684         case SLJIT_MOVU_U32:
685         case SLJIT_MOVU_S32:
686         case SLJIT_MOVU_P:
687                 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
688                 if (dst == arg2)
689                         return SLJIT_SUCCESS;
690                 return push_inst16(compiler, MOV | SET_REGS44(dst, arg2));
691         case SLJIT_MOV_U8:
692         case SLJIT_MOVU_U8:
693                 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
694                 if (IS_2_LO_REGS(dst, arg2))
695                         return push_inst16(compiler, UXTB | RD3(dst) | RN3(arg2));
696                 return push_inst32(compiler, UXTB_W | RD4(dst) | RM4(arg2));
697         case SLJIT_MOV_S8:
698         case SLJIT_MOVU_S8:
699                 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
700                 if (IS_2_LO_REGS(dst, arg2))
701                         return push_inst16(compiler, SXTB | RD3(dst) | RN3(arg2));
702                 return push_inst32(compiler, SXTB_W | RD4(dst) | RM4(arg2));
703         case SLJIT_MOV_U16:
704         case SLJIT_MOVU_U16:
705                 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
706                 if (IS_2_LO_REGS(dst, arg2))
707                         return push_inst16(compiler, UXTH | RD3(dst) | RN3(arg2));
708                 return push_inst32(compiler, UXTH_W | RD4(dst) | RM4(arg2));
709         case SLJIT_MOV_S16:
710         case SLJIT_MOVU_S16:
711                 SLJIT_ASSERT(!(flags & SET_FLAGS) && arg1 == TMP_REG1);
712                 if (IS_2_LO_REGS(dst, arg2))
713                         return push_inst16(compiler, SXTH | RD3(dst) | RN3(arg2));
714                 return push_inst32(compiler, SXTH_W | RD4(dst) | RM4(arg2));
715         case SLJIT_NOT:
716                 SLJIT_ASSERT(arg1 == TMP_REG1);
717                 if (!(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
718                         return push_inst16(compiler, MVNS | RD3(dst) | RN3(arg2));
719                 return push_inst32(compiler, MVN_W | (flags & SET_FLAGS) | RD4(dst) | RM4(arg2));
720         case SLJIT_CLZ:
721                 SLJIT_ASSERT(arg1 == TMP_REG1);
722                 FAIL_IF(push_inst32(compiler, CLZ | RN4(arg2) | RD4(dst) | RM4(arg2)));
723                 if (flags & SET_FLAGS) {
724                         if (reg_map[dst] <= 7)
725                                 return push_inst16(compiler, CMPI | RDN3(dst));
726                         return push_inst32(compiler, ADD_WI | SET_FLAGS | RN4(dst) | RD4(dst));
727                 }
728                 return SLJIT_SUCCESS;
729         case SLJIT_ADD:
730                 if (!(flags & KEEP_FLAGS) && IS_3_LO_REGS(dst, arg1, arg2))
731                         return push_inst16(compiler, ADDS | RD3(dst) | RN3(arg1) | RM3(arg2));
732                 if (dst == arg1 && !(flags & SET_FLAGS))
733                         return push_inst16(compiler, ADD | SET_REGS44(dst, arg2));
734                 return push_inst32(compiler, ADD_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
735         case SLJIT_ADDC:
736                 if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
737                         return push_inst16(compiler, ADCS | RD3(dst) | RN3(arg2));
738                 return push_inst32(compiler, ADC_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
739         case SLJIT_SUB:
740                 if (!(flags & KEEP_FLAGS) && IS_3_LO_REGS(dst, arg1, arg2))
741                         return push_inst16(compiler, SUBS | RD3(dst) | RN3(arg1) | RM3(arg2));
742                 return push_inst32(compiler, SUB_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
743         case SLJIT_SUBC:
744                 if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
745                         return push_inst16(compiler, SBCS | RD3(dst) | RN3(arg2));
746                 return push_inst32(compiler, SBC_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
747         case SLJIT_MUL:
748                 if (!(flags & SET_FLAGS))
749                         return push_inst32(compiler, MUL | RD4(dst) | RN4(arg1) | RM4(arg2));
750                 SLJIT_ASSERT(reg_map[TMP_REG2] <= 7 && dst != TMP_REG2);
751                 FAIL_IF(push_inst32(compiler, SMULL | RT4(dst) | RD4(TMP_REG2) | RN4(arg1) | RM4(arg2)));
752                 /* cmp TMP_REG2, dst asr #31. */
753                 return push_inst32(compiler, CMP_W | RN4(TMP_REG2) | 0x70e0 | RM4(dst));
754         case SLJIT_AND:
755                 if (!(flags & KEEP_FLAGS)) {
756                         if (dst == arg1 && IS_2_LO_REGS(dst, arg2))
757                                 return push_inst16(compiler, ANDS | RD3(dst) | RN3(arg2));
758                         if ((flags & UNUSED_RETURN) && IS_2_LO_REGS(arg1, arg2))
759                                 return push_inst16(compiler, TST | RD3(arg1) | RN3(arg2));
760                 }
761                 return push_inst32(compiler, AND_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
762         case SLJIT_OR:
763                 if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
764                         return push_inst16(compiler, ORRS | RD3(dst) | RN3(arg2));
765                 return push_inst32(compiler, ORR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
766         case SLJIT_XOR:
767                 if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
768                         return push_inst16(compiler, EORS | RD3(dst) | RN3(arg2));
769                 return push_inst32(compiler, EOR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
770         case SLJIT_SHL:
771                 if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
772                         return push_inst16(compiler, LSLS | RD3(dst) | RN3(arg2));
773                 return push_inst32(compiler, LSL_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
774         case SLJIT_LSHR:
775                 if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
776                         return push_inst16(compiler, LSRS | RD3(dst) | RN3(arg2));
777                 return push_inst32(compiler, LSR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
778         case SLJIT_ASHR:
779                 if (dst == arg1 && !(flags & KEEP_FLAGS) && IS_2_LO_REGS(dst, arg2))
780                         return push_inst16(compiler, ASRS | RD3(dst) | RN3(arg2));
781                 return push_inst32(compiler, ASR_W | (flags & SET_FLAGS) | RD4(dst) | RN4(arg1) | RM4(arg2));
782         }
783
784         SLJIT_ASSERT_STOP();
785         return SLJIT_SUCCESS;
786 }
787
788 #define STORE           0x01
789 #define SIGNED          0x02
790
791 #define WORD_SIZE       0x00
792 #define BYTE_SIZE       0x04
793 #define HALF_SIZE       0x08
794
795 #define UPDATE          0x10
796 #define ARG_TEST        0x20
797
798 #define IS_WORD_SIZE(flags)             (!(flags & (BYTE_SIZE | HALF_SIZE)))
799 #define OFFSET_CHECK(imm, shift)        (!(argw & ~(imm << shift)))
800
801 /*
802   1st letter:
803   w = word
804   b = byte
805   h = half
806
807   2nd letter:
808   s = signed
809   u = unsigned
810
811   3rd letter:
812   l = load
813   s = store
814 */
815
816 static const sljit_ins sljit_mem16[12] = {
817 /* w u l */ 0x5800 /* ldr */,
818 /* w u s */ 0x5000 /* str */,
819 /* w s l */ 0x5800 /* ldr */,
820 /* w s s */ 0x5000 /* str */,
821
822 /* b u l */ 0x5c00 /* ldrb */,
823 /* b u s */ 0x5400 /* strb */,
824 /* b s l */ 0x5600 /* ldrsb */,
825 /* b s s */ 0x5400 /* strb */,
826
827 /* h u l */ 0x5a00 /* ldrh */,
828 /* h u s */ 0x5200 /* strh */,
829 /* h s l */ 0x5e00 /* ldrsh */,
830 /* h s s */ 0x5200 /* strh */,
831 };
832
833 static const sljit_ins sljit_mem16_imm5[12] = {
834 /* w u l */ 0x6800 /* ldr imm5 */,
835 /* w u s */ 0x6000 /* str imm5 */,
836 /* w s l */ 0x6800 /* ldr imm5 */,
837 /* w s s */ 0x6000 /* str imm5 */,
838
839 /* b u l */ 0x7800 /* ldrb imm5 */,
840 /* b u s */ 0x7000 /* strb imm5 */,
841 /* b s l */ 0x0000 /* not allowed */,
842 /* b s s */ 0x7000 /* strb imm5 */,
843
844 /* h u l */ 0x8800 /* ldrh imm5 */,
845 /* h u s */ 0x8000 /* strh imm5 */,
846 /* h s l */ 0x0000 /* not allowed */,
847 /* h s s */ 0x8000 /* strh imm5 */,
848 };
849
850 #define MEM_IMM8        0xc00
851 #define MEM_IMM12       0x800000
852 static const sljit_ins sljit_mem32[12] = {
853 /* w u l */ 0xf8500000 /* ldr.w */,
854 /* w u s */ 0xf8400000 /* str.w */,
855 /* w s l */ 0xf8500000 /* ldr.w */,
856 /* w s s */ 0xf8400000 /* str.w */,
857
858 /* b u l */ 0xf8100000 /* ldrb.w */,
859 /* b u s */ 0xf8000000 /* strb.w */,
860 /* b s l */ 0xf9100000 /* ldrsb.w */,
861 /* b s s */ 0xf8000000 /* strb.w */,
862
863 /* h u l */ 0xf8300000 /* ldrh.w */,
864 /* h u s */ 0xf8200000 /* strsh.w */,
865 /* h s l */ 0xf9300000 /* ldrsh.w */,
866 /* h s s */ 0xf8200000 /* strsh.w */,
867 };
868
869 /* Helper function. Dst should be reg + value, using at most 1 instruction, flags does not set. */
870 static sljit_s32 emit_set_delta(struct sljit_compiler *compiler, sljit_s32 dst, sljit_s32 reg, sljit_sw value)
871 {
872         if (value >= 0) {
873                 if (value <= 0xfff)
874                         return push_inst32(compiler, ADDWI | RD4(dst) | RN4(reg) | IMM12(value));
875                 value = get_imm(value);
876                 if (value != INVALID_IMM)
877                         return push_inst32(compiler, ADD_WI | RD4(dst) | RN4(reg) | value);
878         }
879         else {
880                 value = -value;
881                 if (value <= 0xfff)
882                         return push_inst32(compiler, SUBWI | RD4(dst) | RN4(reg) | IMM12(value));
883                 value = get_imm(value);
884                 if (value != INVALID_IMM)
885                         return push_inst32(compiler, SUB_WI | RD4(dst) | RN4(reg) | value);
886         }
887         return SLJIT_ERR_UNSUPPORTED;
888 }
889
890 /* Can perform an operation using at most 1 instruction. */
891 static sljit_s32 getput_arg_fast(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg, sljit_s32 arg, sljit_sw argw)
892 {
893         sljit_s32 other_r, shift;
894
895         SLJIT_ASSERT(arg & SLJIT_MEM);
896
897         if (SLJIT_UNLIKELY(flags & UPDATE)) {
898                 if ((arg & REG_MASK) && !(arg & OFFS_REG_MASK) && argw <= 0xff && argw >= -0xff) {
899                         if (SLJIT_UNLIKELY(flags & ARG_TEST))
900                                 return 1;
901
902                         flags &= ~UPDATE;
903                         arg &= 0xf;
904                         if (argw >= 0)
905                                 argw |= 0x200;
906                         else {
907                                 argw = -argw;
908                         }
909
910                         SLJIT_ASSERT(argw >= 0 && (argw & 0xff) <= 0xff);
911                         FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | MEM_IMM8 | RT4(reg) | RN4(arg) | 0x100 | argw));
912                         return -1;
913                 }
914                 return 0;
915         }
916
917         if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
918                 if (SLJIT_UNLIKELY(flags & ARG_TEST))
919                         return 1;
920
921                 argw &= 0x3;
922                 other_r = OFFS_REG(arg);
923                 arg &= 0xf;
924
925                 if (!argw && IS_3_LO_REGS(reg, arg, other_r))
926                         FAIL_IF(push_inst16(compiler, sljit_mem16[flags] | RD3(reg) | RN3(arg) | RM3(other_r)));
927                 else
928                         FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(other_r) | (argw << 4)));
929                 return -1;
930         }
931
932         if (!(arg & REG_MASK) || argw > 0xfff || argw < -0xff)
933                 return 0;
934
935         if (SLJIT_UNLIKELY(flags & ARG_TEST))
936                 return 1;
937
938         arg &= 0xf;
939         if (IS_2_LO_REGS(reg, arg) && sljit_mem16_imm5[flags]) {
940                 shift = 3;
941                 if (IS_WORD_SIZE(flags)) {
942                         if (OFFSET_CHECK(0x1f, 2))
943                                 shift = 2;
944                 }
945                 else if (flags & BYTE_SIZE)
946                 {
947                         if (OFFSET_CHECK(0x1f, 0))
948                                 shift = 0;
949                 }
950                 else {
951                         SLJIT_ASSERT(flags & HALF_SIZE);
952                         if (OFFSET_CHECK(0x1f, 1))
953                                 shift = 1;
954                 }
955
956                 if (shift != 3) {
957                         FAIL_IF(push_inst16(compiler, sljit_mem16_imm5[flags] | RD3(reg) | RN3(arg) | (argw << (6 - shift))));
958                         return -1;
959                 }
960         }
961
962         /* SP based immediate. */
963         if (SLJIT_UNLIKELY(arg == SLJIT_SP) && OFFSET_CHECK(0xff, 2) && IS_WORD_SIZE(flags) && reg_map[reg] <= 7) {
964                 FAIL_IF(push_inst16(compiler, STR_SP | ((flags & STORE) ? 0 : 0x800) | RDN3(reg) | (argw >> 2)));
965                 return -1;
966         }
967
968         if (argw >= 0)
969                 FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(arg) | argw));
970         else
971                 FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | MEM_IMM8 | RT4(reg) | RN4(arg) | -argw));
972         return -1;
973 }
974
975 /* see getput_arg below.
976    Note: can_cache is called only for binary operators. Those
977    operators always uses word arguments without write back. */
978 static sljit_s32 can_cache(sljit_s32 arg, sljit_sw argw, sljit_s32 next_arg, sljit_sw next_argw)
979 {
980         sljit_sw diff;
981         if ((arg & OFFS_REG_MASK) || !(next_arg & SLJIT_MEM))
982                 return 0;
983
984         if (!(arg & REG_MASK)) {
985                 diff = argw - next_argw;
986                 if (diff <= 0xfff && diff >= -0xfff)
987                         return 1;
988                 return 0;
989         }
990
991         if (argw == next_argw)
992                 return 1;
993
994         diff = argw - next_argw;
995         if (arg == next_arg && diff <= 0xfff && diff >= -0xfff)
996                 return 1;
997
998         return 0;
999 }
1000
1001 /* Emit the necessary instructions. See can_cache above. */
1002 static sljit_s32 getput_arg(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg,
1003         sljit_s32 arg, sljit_sw argw, sljit_s32 next_arg, sljit_sw next_argw)
1004 {
1005         sljit_s32 tmp_r, other_r;
1006         sljit_sw diff;
1007
1008         SLJIT_ASSERT(arg & SLJIT_MEM);
1009         if (!(next_arg & SLJIT_MEM)) {
1010                 next_arg = 0;
1011                 next_argw = 0;
1012         }
1013
1014         tmp_r = (flags & STORE) ? TMP_REG3 : reg;
1015
1016         if (SLJIT_UNLIKELY((flags & UPDATE) && (arg & REG_MASK))) {
1017                 /* Update only applies if a base register exists. */
1018                 /* There is no caching here. */
1019                 other_r = OFFS_REG(arg);
1020                 arg &= 0xf;
1021                 flags &= ~UPDATE;
1022
1023                 if (!other_r) {
1024                         if (!(argw & ~0xfff)) {
1025                                 FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(arg) | argw));
1026                                 return push_inst32(compiler, ADDWI | RD4(arg) | RN4(arg) | IMM12(argw));
1027                         }
1028
1029                         if (compiler->cache_arg == SLJIT_MEM) {
1030                                 if (argw == compiler->cache_argw) {
1031                                         other_r = TMP_REG3;
1032                                         argw = 0;
1033                                 }
1034                                 else if (emit_set_delta(compiler, TMP_REG3, TMP_REG3, argw - compiler->cache_argw) != SLJIT_ERR_UNSUPPORTED) {
1035                                         FAIL_IF(compiler->error);
1036                                         compiler->cache_argw = argw;
1037                                         other_r = TMP_REG3;
1038                                         argw = 0;
1039                                 }
1040                         }
1041
1042                         if (argw) {
1043                                 FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
1044                                 compiler->cache_arg = SLJIT_MEM;
1045                                 compiler->cache_argw = argw;
1046                                 other_r = TMP_REG3;
1047                                 argw = 0;
1048                         }
1049                 }
1050
1051                 argw &= 0x3;
1052                 if (!argw && IS_3_LO_REGS(reg, arg, other_r)) {
1053                         FAIL_IF(push_inst16(compiler, sljit_mem16[flags] | RD3(reg) | RN3(arg) | RM3(other_r)));
1054                         return push_inst16(compiler, ADD | SET_REGS44(arg, other_r));
1055                 }
1056                 FAIL_IF(push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(other_r) | (argw << 4)));
1057                 return push_inst32(compiler, ADD_W | RD4(arg) | RN4(arg) | RM4(other_r) | (argw << 6));
1058         }
1059         flags &= ~UPDATE;
1060
1061         SLJIT_ASSERT(!(arg & OFFS_REG_MASK));
1062
1063         if (compiler->cache_arg == arg) {
1064                 diff = argw - compiler->cache_argw;
1065                 if (!(diff & ~0xfff))
1066                         return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(TMP_REG3) | diff);
1067                 if (!((compiler->cache_argw - argw) & ~0xff))
1068                         return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM8 | RT4(reg) | RN4(TMP_REG3) | (compiler->cache_argw - argw));
1069                 if (emit_set_delta(compiler, TMP_REG3, TMP_REG3, diff) != SLJIT_ERR_UNSUPPORTED) {
1070                         FAIL_IF(compiler->error);
1071                         return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(TMP_REG3) | 0);
1072                 }
1073         }
1074
1075         next_arg = (arg & REG_MASK) && (arg == next_arg) && (argw != next_argw);
1076         arg &= 0xf;
1077         if (arg && compiler->cache_arg == SLJIT_MEM) {
1078                 if (compiler->cache_argw == argw)
1079                         return push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(TMP_REG3));
1080                 if (emit_set_delta(compiler, TMP_REG3, TMP_REG3, argw - compiler->cache_argw) != SLJIT_ERR_UNSUPPORTED) {
1081                         FAIL_IF(compiler->error);
1082                         compiler->cache_argw = argw;
1083                         return push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(TMP_REG3));
1084                 }
1085         }
1086
1087         compiler->cache_argw = argw;
1088         if (next_arg && emit_set_delta(compiler, TMP_REG3, arg, argw) != SLJIT_ERR_UNSUPPORTED) {
1089                 FAIL_IF(compiler->error);
1090                 compiler->cache_arg = SLJIT_MEM | arg;
1091                 arg = 0;
1092         }
1093         else {
1094                 FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
1095                 compiler->cache_arg = SLJIT_MEM;
1096
1097                 diff = argw - next_argw;
1098                 if (next_arg && diff <= 0xfff && diff >= -0xfff) {
1099                         FAIL_IF(push_inst16(compiler, ADD | SET_REGS44(TMP_REG3, arg)));
1100                         compiler->cache_arg = SLJIT_MEM | arg;
1101                         arg = 0;
1102                 }
1103         }
1104
1105         if (arg)
1106                 return push_inst32(compiler, sljit_mem32[flags] | RT4(reg) | RN4(arg) | RM4(TMP_REG3));
1107         return push_inst32(compiler, sljit_mem32[flags] | MEM_IMM12 | RT4(reg) | RN4(TMP_REG3) | 0);
1108 }
1109
1110 static SLJIT_INLINE sljit_s32 emit_op_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg, sljit_s32 arg, sljit_sw argw)
1111 {
1112         if (getput_arg_fast(compiler, flags, reg, arg, argw))
1113                 return compiler->error;
1114         compiler->cache_arg = 0;
1115         compiler->cache_argw = 0;
1116         return getput_arg(compiler, flags, reg, arg, argw, 0, 0);
1117 }
1118
1119 static SLJIT_INLINE sljit_s32 emit_op_mem2(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg, sljit_s32 arg1, sljit_sw arg1w, sljit_s32 arg2, sljit_sw arg2w)
1120 {
1121         if (getput_arg_fast(compiler, flags, reg, arg1, arg1w))
1122                 return compiler->error;
1123         return getput_arg(compiler, flags, reg, arg1, arg1w, arg2, arg2w);
1124 }
1125
1126 /* --------------------------------------------------------------------- */
1127 /*  Entry, exit                                                          */
1128 /* --------------------------------------------------------------------- */
1129
1130 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler,
1131         sljit_s32 options, sljit_s32 args, sljit_s32 scratches, sljit_s32 saveds,
1132         sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
1133 {
1134         sljit_s32 size, i, tmp;
1135         sljit_ins push;
1136
1137         CHECK_ERROR();
1138         CHECK(check_sljit_emit_enter(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size));
1139         set_emit_enter(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size);
1140
1141         push = (1 << 4);
1142
1143         tmp = saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - saveds) : SLJIT_FIRST_SAVED_REG;
1144         for (i = SLJIT_S0; i >= tmp; i--)
1145                 push |= 1 << reg_map[i];
1146
1147         for (i = scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
1148                 push |= 1 << reg_map[i];
1149
1150         FAIL_IF((push & 0xff00)
1151                 ? push_inst32(compiler, PUSH_W | (1 << 14) | push)
1152                 : push_inst16(compiler, PUSH | (1 << 8) | push));
1153
1154         /* Stack must be aligned to 8 bytes: (LR, R4) */
1155         size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 2);
1156         local_size = ((size + local_size + 7) & ~7) - size;
1157         compiler->local_size = local_size;
1158         if (local_size > 0) {
1159                 if (local_size <= (127 << 2))
1160                         FAIL_IF(push_inst16(compiler, SUB_SP | (local_size >> 2)));
1161                 else
1162                         FAIL_IF(emit_op_imm(compiler, SLJIT_SUB | ARG2_IMM, SLJIT_SP, SLJIT_SP, local_size));
1163         }
1164
1165         if (args >= 1)
1166                 FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_S0, SLJIT_R0)));
1167         if (args >= 2)
1168                 FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_S1, SLJIT_R1)));
1169         if (args >= 3)
1170                 FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(SLJIT_S2, SLJIT_R2)));
1171
1172         return SLJIT_SUCCESS;
1173 }
1174
1175 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_set_context(struct sljit_compiler *compiler,
1176         sljit_s32 options, sljit_s32 args, sljit_s32 scratches, sljit_s32 saveds,
1177         sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size)
1178 {
1179         sljit_s32 size;
1180
1181         CHECK_ERROR();
1182         CHECK(check_sljit_set_context(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size));
1183         set_set_context(compiler, options, args, scratches, saveds, fscratches, fsaveds, local_size);
1184
1185         size = GET_SAVED_REGISTERS_SIZE(scratches, saveds, 2);
1186         compiler->local_size = ((size + local_size + 7) & ~7) - size;
1187         return SLJIT_SUCCESS;
1188 }
1189
1190 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_return(struct sljit_compiler *compiler, sljit_s32 op, sljit_s32 src, sljit_sw srcw)
1191 {
1192         sljit_s32 i, tmp;
1193         sljit_ins pop;
1194
1195         CHECK_ERROR();
1196         CHECK(check_sljit_emit_return(compiler, op, src, srcw));
1197
1198         FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
1199
1200         if (compiler->local_size > 0) {
1201                 if (compiler->local_size <= (127 << 2))
1202                         FAIL_IF(push_inst16(compiler, ADD_SP | (compiler->local_size >> 2)));
1203                 else
1204                         FAIL_IF(emit_op_imm(compiler, SLJIT_ADD | ARG2_IMM, SLJIT_SP, SLJIT_SP, compiler->local_size));
1205         }
1206
1207         pop = (1 << 4);
1208
1209         tmp = compiler->saveds < SLJIT_NUMBER_OF_SAVED_REGISTERS ? (SLJIT_S0 + 1 - compiler->saveds) : SLJIT_FIRST_SAVED_REG;
1210         for (i = SLJIT_S0; i >= tmp; i--)
1211                 pop |= 1 << reg_map[i];
1212
1213         for (i = compiler->scratches; i >= SLJIT_FIRST_SAVED_REG; i--)
1214                 pop |= 1 << reg_map[i];
1215
1216         return (pop & 0xff00)
1217                 ? push_inst32(compiler, POP_W | (1 << 15) | pop)
1218                 : push_inst16(compiler, POP | (1 << 8) | pop);
1219 }
1220
1221 /* --------------------------------------------------------------------- */
1222 /*  Operators                                                            */
1223 /* --------------------------------------------------------------------- */
1224
1225 #ifdef __cplusplus
1226 extern "C" {
1227 #endif
1228
1229 #if defined(__GNUC__)
1230 extern unsigned int __aeabi_uidivmod(unsigned int numerator, int unsigned denominator);
1231 extern int __aeabi_idivmod(int numerator, int denominator);
1232 #else
1233 #error "Software divmod functions are needed"
1234 #endif
1235
1236 #ifdef __cplusplus
1237 }
1238 #endif
1239
1240 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op0(struct sljit_compiler *compiler, sljit_s32 op)
1241 {
1242         sljit_sw saved_reg_list[3];
1243         sljit_sw saved_reg_count;
1244
1245         CHECK_ERROR();
1246         CHECK(check_sljit_emit_op0(compiler, op));
1247
1248         op = GET_OPCODE(op);
1249         switch (op) {
1250         case SLJIT_BREAKPOINT:
1251                 return push_inst16(compiler, BKPT);
1252         case SLJIT_NOP:
1253                 return push_inst16(compiler, NOP);
1254         case SLJIT_LMUL_UW:
1255         case SLJIT_LMUL_SW:
1256                 return push_inst32(compiler, (op == SLJIT_LMUL_UW ? UMULL : SMULL)
1257                         | (reg_map[SLJIT_R1] << 8)
1258                         | (reg_map[SLJIT_R0] << 12)
1259                         | (reg_map[SLJIT_R0] << 16)
1260                         | reg_map[SLJIT_R1]);
1261         case SLJIT_DIVMOD_UW:
1262         case SLJIT_DIVMOD_SW:
1263         case SLJIT_DIV_UW:
1264         case SLJIT_DIV_SW:
1265                 SLJIT_COMPILE_ASSERT((SLJIT_DIVMOD_UW & 0x2) == 0 && SLJIT_DIV_UW - 0x2 == SLJIT_DIVMOD_UW, bad_div_opcode_assignments);
1266                 SLJIT_COMPILE_ASSERT(reg_map[2] == 1 && reg_map[3] == 2 && reg_map[4] == 12, bad_register_mapping);
1267
1268                 saved_reg_count = 0;
1269                 if (compiler->scratches >= 4)
1270                         saved_reg_list[saved_reg_count++] = 12;
1271                 if (compiler->scratches >= 3)
1272                         saved_reg_list[saved_reg_count++] = 2;
1273                 if (op >= SLJIT_DIV_UW)
1274                         saved_reg_list[saved_reg_count++] = 1;
1275
1276                 if (saved_reg_count > 0) {
1277                         FAIL_IF(push_inst32(compiler, 0xf84d0d00 | (saved_reg_count >= 3 ? 16 : 8)
1278                                                 | (saved_reg_list[0] << 12) /* str rX, [sp, #-8/-16]! */));
1279                         if (saved_reg_count >= 2) {
1280                                 SLJIT_ASSERT(saved_reg_list[1] < 8);
1281                                 FAIL_IF(push_inst16(compiler, 0x9001 | (saved_reg_list[1] << 8) /* str rX, [sp, #4] */));
1282                         }
1283                         if (saved_reg_count >= 3) {
1284                                 SLJIT_ASSERT(saved_reg_list[2] < 8);
1285                                 FAIL_IF(push_inst16(compiler, 0x9002 | (saved_reg_list[2] << 8) /* str rX, [sp, #8] */));
1286                         }
1287                 }
1288
1289 #if 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         }
1310
1311         return SLJIT_SUCCESS;
1312 }
1313
1314 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op1(struct sljit_compiler *compiler, sljit_s32 op,
1315         sljit_s32 dst, sljit_sw dstw,
1316         sljit_s32 src, sljit_sw srcw)
1317 {
1318         sljit_s32 dst_r, flags;
1319         sljit_s32 op_flags = GET_ALL_FLAGS(op);
1320
1321         CHECK_ERROR();
1322         CHECK(check_sljit_emit_op1(compiler, op, dst, dstw, src, srcw));
1323         ADJUST_LOCAL_OFFSET(dst, dstw);
1324         ADJUST_LOCAL_OFFSET(src, srcw);
1325
1326         compiler->cache_arg = 0;
1327         compiler->cache_argw = 0;
1328
1329         dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG1;
1330
1331         op = GET_OPCODE(op);
1332         if (op >= SLJIT_MOV && op <= SLJIT_MOVU_P) {
1333                 switch (op) {
1334                 case SLJIT_MOV:
1335                 case SLJIT_MOV_U32:
1336                 case SLJIT_MOV_S32:
1337                 case SLJIT_MOV_P:
1338                         flags = WORD_SIZE;
1339                         break;
1340                 case SLJIT_MOV_U8:
1341                         flags = BYTE_SIZE;
1342                         if (src & SLJIT_IMM)
1343                                 srcw = (sljit_u8)srcw;
1344                         break;
1345                 case SLJIT_MOV_S8:
1346                         flags = BYTE_SIZE | SIGNED;
1347                         if (src & SLJIT_IMM)
1348                                 srcw = (sljit_s8)srcw;
1349                         break;
1350                 case SLJIT_MOV_U16:
1351                         flags = HALF_SIZE;
1352                         if (src & SLJIT_IMM)
1353                                 srcw = (sljit_u16)srcw;
1354                         break;
1355                 case SLJIT_MOV_S16:
1356                         flags = HALF_SIZE | SIGNED;
1357                         if (src & SLJIT_IMM)
1358                                 srcw = (sljit_s16)srcw;
1359                         break;
1360                 case SLJIT_MOVU:
1361                 case SLJIT_MOVU_U32:
1362                 case SLJIT_MOVU_S32:
1363                 case SLJIT_MOVU_P:
1364                         flags = WORD_SIZE | UPDATE;
1365                         break;
1366                 case SLJIT_MOVU_U8:
1367                         flags = BYTE_SIZE | UPDATE;
1368                         if (src & SLJIT_IMM)
1369                                 srcw = (sljit_u8)srcw;
1370                         break;
1371                 case SLJIT_MOVU_S8:
1372                         flags = BYTE_SIZE | SIGNED | UPDATE;
1373                         if (src & SLJIT_IMM)
1374                                 srcw = (sljit_s8)srcw;
1375                         break;
1376                 case SLJIT_MOVU_U16:
1377                         flags = HALF_SIZE | UPDATE;
1378                         if (src & SLJIT_IMM)
1379                                 srcw = (sljit_u16)srcw;
1380                         break;
1381                 case SLJIT_MOVU_S16:
1382                         flags = HALF_SIZE | SIGNED | UPDATE;
1383                         if (src & SLJIT_IMM)
1384                                 srcw = (sljit_s16)srcw;
1385                         break;
1386                 default:
1387                         SLJIT_ASSERT_STOP();
1388                         flags = 0;
1389                         break;
1390                 }
1391
1392                 if (src & SLJIT_IMM)
1393                         FAIL_IF(emit_op_imm(compiler, SLJIT_MOV | ARG2_IMM, dst_r, TMP_REG1, srcw));
1394                 else if (src & SLJIT_MEM) {
1395                         if (getput_arg_fast(compiler, flags, dst_r, src, srcw))
1396                                 FAIL_IF(compiler->error);
1397                         else
1398                                 FAIL_IF(getput_arg(compiler, flags, dst_r, src, srcw, dst, dstw));
1399                 } else {
1400                         if (dst_r != TMP_REG1)
1401                                 return emit_op_imm(compiler, op, dst_r, TMP_REG1, src);
1402                         dst_r = src;
1403                 }
1404
1405                 if (dst & SLJIT_MEM) {
1406                         if (getput_arg_fast(compiler, flags | STORE, dst_r, dst, dstw))
1407                                 return compiler->error;
1408                         else
1409                                 return getput_arg(compiler, flags | STORE, dst_r, dst, dstw, 0, 0);
1410                 }
1411                 return SLJIT_SUCCESS;
1412         }
1413
1414         if (op == SLJIT_NEG) {
1415 #if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) \
1416                         || (defined SLJIT_ARGUMENT_CHECKS && SLJIT_ARGUMENT_CHECKS)
1417                 compiler->skip_checks = 1;
1418 #endif
1419                 return sljit_emit_op2(compiler, SLJIT_SUB | op_flags, dst, dstw, SLJIT_IMM, 0, src, srcw);
1420         }
1421
1422         flags = (GET_FLAGS(op_flags) ? SET_FLAGS : 0) | ((op_flags & SLJIT_KEEP_FLAGS) ? KEEP_FLAGS : 0);
1423         if (src & SLJIT_MEM) {
1424                 if (getput_arg_fast(compiler, WORD_SIZE, TMP_REG2, src, srcw))
1425                         FAIL_IF(compiler->error);
1426                 else
1427                         FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG2, src, srcw, dst, dstw));
1428                 src = TMP_REG2;
1429         }
1430
1431         if (src & SLJIT_IMM)
1432                 flags |= ARG2_IMM;
1433         else
1434                 srcw = src;
1435
1436         emit_op_imm(compiler, flags | op, dst_r, TMP_REG1, srcw);
1437
1438         if (dst & SLJIT_MEM) {
1439                 if (getput_arg_fast(compiler, flags | STORE, dst_r, dst, dstw))
1440                         return compiler->error;
1441                 else
1442                         return getput_arg(compiler, flags | STORE, dst_r, dst, dstw, 0, 0);
1443         }
1444         return SLJIT_SUCCESS;
1445 }
1446
1447 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op2(struct sljit_compiler *compiler, sljit_s32 op,
1448         sljit_s32 dst, sljit_sw dstw,
1449         sljit_s32 src1, sljit_sw src1w,
1450         sljit_s32 src2, sljit_sw src2w)
1451 {
1452         sljit_s32 dst_r, flags;
1453
1454         CHECK_ERROR();
1455         CHECK(check_sljit_emit_op2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1456         ADJUST_LOCAL_OFFSET(dst, dstw);
1457         ADJUST_LOCAL_OFFSET(src1, src1w);
1458         ADJUST_LOCAL_OFFSET(src2, src2w);
1459
1460         compiler->cache_arg = 0;
1461         compiler->cache_argw = 0;
1462
1463         dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG1;
1464         flags = (GET_FLAGS(op) ? SET_FLAGS : 0) | ((op & SLJIT_KEEP_FLAGS) ? KEEP_FLAGS : 0);
1465
1466         if ((dst & SLJIT_MEM) && !getput_arg_fast(compiler, WORD_SIZE | STORE | ARG_TEST, TMP_REG1, dst, dstw))
1467                 flags |= SLOW_DEST;
1468
1469         if (src1 & SLJIT_MEM) {
1470                 if (getput_arg_fast(compiler, WORD_SIZE, TMP_REG1, src1, src1w))
1471                         FAIL_IF(compiler->error);
1472                 else
1473                         flags |= SLOW_SRC1;
1474         }
1475         if (src2 & SLJIT_MEM) {
1476                 if (getput_arg_fast(compiler, WORD_SIZE, TMP_REG2, src2, src2w))
1477                         FAIL_IF(compiler->error);
1478                 else
1479                         flags |= SLOW_SRC2;
1480         }
1481
1482         if ((flags & (SLOW_SRC1 | SLOW_SRC2)) == (SLOW_SRC1 | SLOW_SRC2)) {
1483                 if (!can_cache(src1, src1w, src2, src2w) && can_cache(src1, src1w, dst, dstw)) {
1484                         FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG2, src2, src2w, src1, src1w));
1485                         FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG1, src1, src1w, dst, dstw));
1486                 }
1487                 else {
1488                         FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG1, src1, src1w, src2, src2w));
1489                         FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG2, src2, src2w, dst, dstw));
1490                 }
1491         }
1492         else if (flags & SLOW_SRC1)
1493                 FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG1, src1, src1w, dst, dstw));
1494         else if (flags & SLOW_SRC2)
1495                 FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG2, src2, src2w, dst, dstw));
1496
1497         if (src1 & SLJIT_MEM)
1498                 src1 = TMP_REG1;
1499         if (src2 & SLJIT_MEM)
1500                 src2 = TMP_REG2;
1501
1502         if (src1 & SLJIT_IMM)
1503                 flags |= ARG1_IMM;
1504         else
1505                 src1w = src1;
1506         if (src2 & SLJIT_IMM)
1507                 flags |= ARG2_IMM;
1508         else
1509                 src2w = src2;
1510
1511         if (dst == SLJIT_UNUSED)
1512                 flags |= UNUSED_RETURN;
1513
1514         emit_op_imm(compiler, flags | GET_OPCODE(op), dst_r, src1w, src2w);
1515
1516         if (dst & SLJIT_MEM) {
1517                 if (!(flags & SLOW_DEST)) {
1518                         getput_arg_fast(compiler, WORD_SIZE | STORE, dst_r, dst, dstw);
1519                         return compiler->error;
1520                 }
1521                 return getput_arg(compiler, WORD_SIZE | STORE, TMP_REG1, dst, dstw, 0, 0);
1522         }
1523         return SLJIT_SUCCESS;
1524 }
1525
1526 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_register_index(sljit_s32 reg)
1527 {
1528         CHECK_REG_INDEX(check_sljit_get_register_index(reg));
1529         return reg_map[reg];
1530 }
1531
1532 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_get_float_register_index(sljit_s32 reg)
1533 {
1534         CHECK_REG_INDEX(check_sljit_get_float_register_index(reg));
1535         return reg << 1;
1536 }
1537
1538 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_custom(struct sljit_compiler *compiler,
1539         void *instruction, sljit_s32 size)
1540 {
1541         CHECK_ERROR();
1542         CHECK(check_sljit_emit_op_custom(compiler, instruction, size));
1543
1544         if (size == 2)
1545                 return push_inst16(compiler, *(sljit_u16*)instruction);
1546         return push_inst32(compiler, *(sljit_ins*)instruction);
1547 }
1548
1549 /* --------------------------------------------------------------------- */
1550 /*  Floating point operators                                             */
1551 /* --------------------------------------------------------------------- */
1552
1553 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_is_fpu_available(void)
1554 {
1555 #ifdef SLJIT_IS_FPU_AVAILABLE
1556         return SLJIT_IS_FPU_AVAILABLE;
1557 #else
1558         /* Available by default. */
1559         return 1;
1560 #endif
1561 }
1562
1563 #define FPU_LOAD (1 << 20)
1564
1565 static sljit_s32 emit_fop_mem(struct sljit_compiler *compiler, sljit_s32 flags, sljit_s32 reg, sljit_s32 arg, sljit_sw argw)
1566 {
1567         sljit_sw tmp;
1568         sljit_uw imm;
1569         sljit_sw inst = VSTR_F32 | (flags & (SLJIT_F32_OP | FPU_LOAD));
1570
1571         SLJIT_ASSERT(arg & SLJIT_MEM);
1572
1573         /* Fast loads and stores. */
1574         if (SLJIT_UNLIKELY(arg & OFFS_REG_MASK)) {
1575                 FAIL_IF(push_inst32(compiler, ADD_W | RD4(TMP_REG2) | RN4(arg & REG_MASK) | RM4(OFFS_REG(arg)) | ((argw & 0x3) << 6)));
1576                 arg = SLJIT_MEM | TMP_REG2;
1577                 argw = 0;
1578         }
1579
1580         if ((arg & REG_MASK) && (argw & 0x3) == 0) {
1581                 if (!(argw & ~0x3fc))
1582                         return push_inst32(compiler, inst | 0x800000 | RN4(arg & REG_MASK) | DD4(reg) | (argw >> 2));
1583                 if (!(-argw & ~0x3fc))
1584                         return push_inst32(compiler, inst | RN4(arg & REG_MASK) | DD4(reg) | (-argw >> 2));
1585         }
1586
1587         /* Slow cases */
1588         SLJIT_ASSERT(!(arg & OFFS_REG_MASK));
1589         if (compiler->cache_arg == arg) {
1590                 tmp = argw - compiler->cache_argw;
1591                 if (!(tmp & ~0x3fc))
1592                         return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG3) | DD4(reg) | (tmp >> 2));
1593                 if (!(-tmp & ~0x3fc))
1594                         return push_inst32(compiler, inst | RN4(TMP_REG3) | DD4(reg) | (-tmp >> 2));
1595                 if (emit_set_delta(compiler, TMP_REG3, TMP_REG3, tmp) != SLJIT_ERR_UNSUPPORTED) {
1596                         FAIL_IF(compiler->error);
1597                         compiler->cache_argw = argw;
1598                         return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG3) | DD4(reg));
1599                 }
1600         }
1601
1602         if (arg & REG_MASK) {
1603                 if (emit_set_delta(compiler, TMP_REG1, arg & REG_MASK, argw) != SLJIT_ERR_UNSUPPORTED) {
1604                         FAIL_IF(compiler->error);
1605                         return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG1) | DD4(reg));
1606                 }
1607                 imm = get_imm(argw & ~0x3fc);
1608                 if (imm != INVALID_IMM) {
1609                         FAIL_IF(push_inst32(compiler, ADD_WI | RD4(TMP_REG1) | RN4(arg & REG_MASK) | imm));
1610                         return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG1) | DD4(reg) | ((argw & 0x3fc) >> 2));
1611                 }
1612                 imm = get_imm(-argw & ~0x3fc);
1613                 if (imm != INVALID_IMM) {
1614                         argw = -argw;
1615                         FAIL_IF(push_inst32(compiler, SUB_WI | RD4(TMP_REG1) | RN4(arg & REG_MASK) | imm));
1616                         return push_inst32(compiler, inst | RN4(TMP_REG1) | DD4(reg) | ((argw & 0x3fc) >> 2));
1617                 }
1618         }
1619
1620         compiler->cache_arg = arg;
1621         compiler->cache_argw = argw;
1622
1623         FAIL_IF(load_immediate(compiler, TMP_REG3, argw));
1624         if (arg & REG_MASK)
1625                 FAIL_IF(push_inst16(compiler, ADD | SET_REGS44(TMP_REG3, (arg & REG_MASK))));
1626         return push_inst32(compiler, inst | 0x800000 | RN4(TMP_REG3) | DD4(reg));
1627 }
1628
1629 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_sw_from_f64(struct sljit_compiler *compiler, sljit_s32 op,
1630         sljit_s32 dst, sljit_sw dstw,
1631         sljit_s32 src, sljit_sw srcw)
1632 {
1633         if (src & SLJIT_MEM) {
1634                 FAIL_IF(emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src, srcw));
1635                 src = TMP_FREG1;
1636         }
1637
1638         FAIL_IF(push_inst32(compiler, VCVT_S32_F32 | (op & SLJIT_F32_OP) | DD4(TMP_FREG1) | DM4(src)));
1639
1640         if (dst == SLJIT_UNUSED)
1641                 return SLJIT_SUCCESS;
1642
1643         if (FAST_IS_REG(dst))
1644                 return push_inst32(compiler, VMOV | (1 << 20) | RT4(dst) | DN4(TMP_FREG1));
1645
1646         /* Store the integer value from a VFP register. */
1647         return emit_fop_mem(compiler, 0, TMP_FREG1, dst, dstw);
1648 }
1649
1650 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_conv_f64_from_sw(struct sljit_compiler *compiler, sljit_s32 op,
1651         sljit_s32 dst, sljit_sw dstw,
1652         sljit_s32 src, sljit_sw srcw)
1653 {
1654         sljit_s32 dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1655
1656         if (FAST_IS_REG(src))
1657                 FAIL_IF(push_inst32(compiler, VMOV | RT4(src) | DN4(TMP_FREG1)));
1658         else if (src & SLJIT_MEM) {
1659                 /* Load the integer value into a VFP register. */
1660                 FAIL_IF(emit_fop_mem(compiler, FPU_LOAD, TMP_FREG1, src, srcw));
1661         }
1662         else {
1663                 FAIL_IF(load_immediate(compiler, TMP_REG1, srcw));
1664                 FAIL_IF(push_inst32(compiler, VMOV | RT4(TMP_REG1) | DN4(TMP_FREG1)));
1665         }
1666
1667         FAIL_IF(push_inst32(compiler, VCVT_F32_S32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(TMP_FREG1)));
1668
1669         if (dst & SLJIT_MEM)
1670                 return emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw);
1671         return SLJIT_SUCCESS;
1672 }
1673
1674 static SLJIT_INLINE sljit_s32 sljit_emit_fop1_cmp(struct sljit_compiler *compiler, sljit_s32 op,
1675         sljit_s32 src1, sljit_sw src1w,
1676         sljit_s32 src2, sljit_sw src2w)
1677 {
1678         if (src1 & SLJIT_MEM) {
1679                 emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w);
1680                 src1 = TMP_FREG1;
1681         }
1682
1683         if (src2 & SLJIT_MEM) {
1684                 emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w);
1685                 src2 = TMP_FREG2;
1686         }
1687
1688         FAIL_IF(push_inst32(compiler, VCMP_F32 | (op & SLJIT_F32_OP) | DD4(src1) | DM4(src2)));
1689         return push_inst32(compiler, VMRS);
1690 }
1691
1692 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop1(struct sljit_compiler *compiler, sljit_s32 op,
1693         sljit_s32 dst, sljit_sw dstw,
1694         sljit_s32 src, sljit_sw srcw)
1695 {
1696         sljit_s32 dst_r;
1697
1698         CHECK_ERROR();
1699         compiler->cache_arg = 0;
1700         compiler->cache_argw = 0;
1701         if (GET_OPCODE(op) != SLJIT_CONV_F64_FROM_F32)
1702                 op ^= SLJIT_F32_OP;
1703
1704         SLJIT_COMPILE_ASSERT((SLJIT_F32_OP == 0x100), float_transfer_bit_error);
1705         SELECT_FOP1_OPERATION_WITH_CHECKS(compiler, op, dst, dstw, src, srcw);
1706
1707         dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1708
1709         if (src & SLJIT_MEM) {
1710                 emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, dst_r, src, srcw);
1711                 src = dst_r;
1712         }
1713
1714         switch (GET_OPCODE(op)) {
1715         case SLJIT_MOV_F64:
1716                 if (src != dst_r) {
1717                         if (dst_r != TMP_FREG1)
1718                                 FAIL_IF(push_inst32(compiler, VMOV_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
1719                         else
1720                                 dst_r = src;
1721                 }
1722                 break;
1723         case SLJIT_NEG_F64:
1724                 FAIL_IF(push_inst32(compiler, VNEG_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
1725                 break;
1726         case SLJIT_ABS_F64:
1727                 FAIL_IF(push_inst32(compiler, VABS_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
1728                 break;
1729         case SLJIT_CONV_F64_FROM_F32:
1730                 FAIL_IF(push_inst32(compiler, VCVT_F64_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DM4(src)));
1731                 op ^= SLJIT_F32_OP;
1732                 break;
1733         }
1734
1735         if (dst & SLJIT_MEM)
1736                 return emit_fop_mem(compiler, (op & SLJIT_F32_OP), dst_r, dst, dstw);
1737         return SLJIT_SUCCESS;
1738 }
1739
1740 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fop2(struct sljit_compiler *compiler, sljit_s32 op,
1741         sljit_s32 dst, sljit_sw dstw,
1742         sljit_s32 src1, sljit_sw src1w,
1743         sljit_s32 src2, sljit_sw src2w)
1744 {
1745         sljit_s32 dst_r;
1746
1747         CHECK_ERROR();
1748         CHECK(check_sljit_emit_fop2(compiler, op, dst, dstw, src1, src1w, src2, src2w));
1749         ADJUST_LOCAL_OFFSET(dst, dstw);
1750         ADJUST_LOCAL_OFFSET(src1, src1w);
1751         ADJUST_LOCAL_OFFSET(src2, src2w);
1752
1753         compiler->cache_arg = 0;
1754         compiler->cache_argw = 0;
1755         op ^= SLJIT_F32_OP;
1756
1757         dst_r = FAST_IS_REG(dst) ? dst : TMP_FREG1;
1758         if (src1 & SLJIT_MEM) {
1759                 emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG1, src1, src1w);
1760                 src1 = TMP_FREG1;
1761         }
1762         if (src2 & SLJIT_MEM) {
1763                 emit_fop_mem(compiler, (op & SLJIT_F32_OP) | FPU_LOAD, TMP_FREG2, src2, src2w);
1764                 src2 = TMP_FREG2;
1765         }
1766
1767         switch (GET_OPCODE(op)) {
1768         case SLJIT_ADD_F64:
1769                 FAIL_IF(push_inst32(compiler, VADD_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
1770                 break;
1771         case SLJIT_SUB_F64:
1772                 FAIL_IF(push_inst32(compiler, VSUB_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
1773                 break;
1774         case SLJIT_MUL_F64:
1775                 FAIL_IF(push_inst32(compiler, VMUL_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
1776                 break;
1777         case SLJIT_DIV_F64:
1778                 FAIL_IF(push_inst32(compiler, VDIV_F32 | (op & SLJIT_F32_OP) | DD4(dst_r) | DN4(src1) | DM4(src2)));
1779                 break;
1780         }
1781
1782         if (!(dst & SLJIT_MEM))
1783                 return SLJIT_SUCCESS;
1784         return emit_fop_mem(compiler, (op & SLJIT_F32_OP), TMP_FREG1, dst, dstw);
1785 }
1786
1787 #undef FPU_LOAD
1788
1789 /* --------------------------------------------------------------------- */
1790 /*  Other instructions                                                   */
1791 /* --------------------------------------------------------------------- */
1792
1793 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw)
1794 {
1795         CHECK_ERROR();
1796         CHECK(check_sljit_emit_fast_enter(compiler, dst, dstw));
1797         ADJUST_LOCAL_OFFSET(dst, dstw);
1798
1799         /* For UNUSED dst. Uncommon, but possible. */
1800         if (dst == SLJIT_UNUSED)
1801                 return SLJIT_SUCCESS;
1802
1803         if (FAST_IS_REG(dst))
1804                 return push_inst16(compiler, MOV | SET_REGS44(dst, TMP_REG3));
1805
1806         /* Memory. */
1807         if (getput_arg_fast(compiler, WORD_SIZE | STORE, TMP_REG3, dst, dstw))
1808                 return compiler->error;
1809         /* TMP_REG3 is used for caching. */
1810         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG2, TMP_REG3)));
1811         compiler->cache_arg = 0;
1812         compiler->cache_argw = 0;
1813         return getput_arg(compiler, WORD_SIZE | STORE, TMP_REG2, dst, dstw, 0, 0);
1814 }
1815
1816 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_s32 src, sljit_sw srcw)
1817 {
1818         CHECK_ERROR();
1819         CHECK(check_sljit_emit_fast_return(compiler, src, srcw));
1820         ADJUST_LOCAL_OFFSET(src, srcw);
1821
1822         if (FAST_IS_REG(src))
1823                 FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG3, src)));
1824         else if (src & SLJIT_MEM) {
1825                 if (getput_arg_fast(compiler, WORD_SIZE, TMP_REG3, src, srcw))
1826                         FAIL_IF(compiler->error);
1827                 else {
1828                         compiler->cache_arg = 0;
1829                         compiler->cache_argw = 0;
1830                         FAIL_IF(getput_arg(compiler, WORD_SIZE, TMP_REG2, src, srcw, 0, 0));
1831                         FAIL_IF(push_inst16(compiler, MOV | SET_REGS44(TMP_REG3, TMP_REG2)));
1832                 }
1833         }
1834         else if (src & SLJIT_IMM)
1835                 FAIL_IF(load_immediate(compiler, TMP_REG3, srcw));
1836         return push_inst16(compiler, BLX | RN3(TMP_REG3));
1837 }
1838
1839 /* --------------------------------------------------------------------- */
1840 /*  Conditional instructions                                             */
1841 /* --------------------------------------------------------------------- */
1842
1843 static sljit_uw get_cc(sljit_s32 type)
1844 {
1845         switch (type) {
1846         case SLJIT_EQUAL:
1847         case SLJIT_MUL_NOT_OVERFLOW:
1848         case SLJIT_EQUAL_F64:
1849                 return 0x0;
1850
1851         case SLJIT_NOT_EQUAL:
1852         case SLJIT_MUL_OVERFLOW:
1853         case SLJIT_NOT_EQUAL_F64:
1854                 return 0x1;
1855
1856         case SLJIT_LESS:
1857         case SLJIT_LESS_F64:
1858                 return 0x3;
1859
1860         case SLJIT_GREATER_EQUAL:
1861         case SLJIT_GREATER_EQUAL_F64:
1862                 return 0x2;
1863
1864         case SLJIT_GREATER:
1865         case SLJIT_GREATER_F64:
1866                 return 0x8;
1867
1868         case SLJIT_LESS_EQUAL:
1869         case SLJIT_LESS_EQUAL_F64:
1870                 return 0x9;
1871
1872         case SLJIT_SIG_LESS:
1873                 return 0xb;
1874
1875         case SLJIT_SIG_GREATER_EQUAL:
1876                 return 0xa;
1877
1878         case SLJIT_SIG_GREATER:
1879                 return 0xc;
1880
1881         case SLJIT_SIG_LESS_EQUAL:
1882                 return 0xd;
1883
1884         case SLJIT_OVERFLOW:
1885         case SLJIT_UNORDERED_F64:
1886                 return 0x6;
1887
1888         case SLJIT_NOT_OVERFLOW:
1889         case SLJIT_ORDERED_F64:
1890                 return 0x7;
1891
1892         default: /* SLJIT_JUMP */
1893                 SLJIT_ASSERT_STOP();
1894                 return 0xe;
1895         }
1896 }
1897
1898 SLJIT_API_FUNC_ATTRIBUTE struct sljit_label* sljit_emit_label(struct sljit_compiler *compiler)
1899 {
1900         struct sljit_label *label;
1901
1902         CHECK_ERROR_PTR();
1903         CHECK_PTR(check_sljit_emit_label(compiler));
1904
1905         if (compiler->last_label && compiler->last_label->size == compiler->size)
1906                 return compiler->last_label;
1907
1908         label = (struct sljit_label*)ensure_abuf(compiler, sizeof(struct sljit_label));
1909         PTR_FAIL_IF(!label);
1910         set_label(label, compiler);
1911         return label;
1912 }
1913
1914 SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_jump(struct sljit_compiler *compiler, sljit_s32 type)
1915 {
1916         struct sljit_jump *jump;
1917         sljit_ins cc;
1918
1919         CHECK_ERROR_PTR();
1920         CHECK_PTR(check_sljit_emit_jump(compiler, type));
1921
1922         jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
1923         PTR_FAIL_IF(!jump);
1924         set_jump(jump, compiler, type & SLJIT_REWRITABLE_JUMP);
1925         type &= 0xff;
1926
1927         /* In ARM, we don't need to touch the arguments. */
1928         PTR_FAIL_IF(emit_imm32_const(compiler, TMP_REG1, 0));
1929         if (type < SLJIT_JUMP) {
1930                 jump->flags |= IS_COND;
1931                 cc = get_cc(type);
1932                 jump->flags |= cc << 8;
1933                 PTR_FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
1934         }
1935
1936         jump->addr = compiler->size;
1937         if (type <= SLJIT_JUMP)
1938                 PTR_FAIL_IF(push_inst16(compiler, BX | RN3(TMP_REG1)));
1939         else {
1940                 jump->flags |= IS_BL;
1941                 PTR_FAIL_IF(push_inst16(compiler, BLX | RN3(TMP_REG1)));
1942         }
1943
1944         return jump;
1945 }
1946
1947 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_ijump(struct sljit_compiler *compiler, sljit_s32 type, sljit_s32 src, sljit_sw srcw)
1948 {
1949         struct sljit_jump *jump;
1950
1951         CHECK_ERROR();
1952         CHECK(check_sljit_emit_ijump(compiler, type, src, srcw));
1953         ADJUST_LOCAL_OFFSET(src, srcw);
1954
1955         /* In ARM, we don't need to touch the arguments. */
1956         if (!(src & SLJIT_IMM)) {
1957                 if (FAST_IS_REG(src))
1958                         return push_inst16(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RN3(src));
1959
1960                 FAIL_IF(emit_op_mem(compiler, WORD_SIZE, type <= SLJIT_JUMP ? TMP_PC : TMP_REG1, src, srcw));
1961                 if (type >= SLJIT_FAST_CALL)
1962                         return push_inst16(compiler, BLX | RN3(TMP_REG1));
1963         }
1964
1965         jump = (struct sljit_jump*)ensure_abuf(compiler, sizeof(struct sljit_jump));
1966         FAIL_IF(!jump);
1967         set_jump(jump, compiler, JUMP_ADDR | ((type >= SLJIT_FAST_CALL) ? IS_BL : 0));
1968         jump->u.target = srcw;
1969
1970         FAIL_IF(emit_imm32_const(compiler, TMP_REG1, 0));
1971         jump->addr = compiler->size;
1972         return push_inst16(compiler, (type <= SLJIT_JUMP ? BX : BLX) | RN3(TMP_REG1));
1973 }
1974
1975 SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_op_flags(struct sljit_compiler *compiler, sljit_s32 op,
1976         sljit_s32 dst, sljit_sw dstw,
1977         sljit_s32 src, sljit_sw srcw,
1978         sljit_s32 type)
1979 {
1980         sljit_s32 dst_r, flags = GET_ALL_FLAGS(op);
1981         sljit_ins cc, ins;
1982
1983         CHECK_ERROR();
1984         CHECK(check_sljit_emit_op_flags(compiler, op, dst, dstw, src, srcw, type));
1985         ADJUST_LOCAL_OFFSET(dst, dstw);
1986         ADJUST_LOCAL_OFFSET(src, srcw);
1987
1988         if (dst == SLJIT_UNUSED)
1989                 return SLJIT_SUCCESS;
1990
1991         op = GET_OPCODE(op);
1992         cc = get_cc(type & 0xff);
1993         dst_r = FAST_IS_REG(dst) ? dst : TMP_REG2;
1994
1995         if (op < SLJIT_ADD) {
1996                 FAIL_IF(push_inst16(compiler, IT | (cc << 4) | (((cc & 0x1) ^ 0x1) << 3) | 0x4));
1997                 if (reg_map[dst_r] > 7) {
1998                         FAIL_IF(push_inst32(compiler, MOV_WI | RD4(dst_r) | 1));
1999                         FAIL_IF(push_inst32(compiler, MOV_WI | RD4(dst_r) | 0));
2000                 } else {
2001                         FAIL_IF(push_inst16(compiler, MOVSI | RDN3(dst_r) | 1));
2002                         FAIL_IF(push_inst16(compiler, MOVSI | RDN3(dst_r) | 0));
2003                 }
2004                 if (dst_r != TMP_REG2)
2005                         return SLJIT_SUCCESS;
2006                 return emit_op_mem(compiler, WORD_SIZE | STORE, TMP_REG2, dst, dstw);
2007         }
2008
2009         ins = (op == SLJIT_AND ? ANDI : (op == SLJIT_OR ? ORRI : EORI));
2010         if ((op == SLJIT_OR || op == SLJIT_XOR) && FAST_IS_REG(dst) && dst == src) {
2011                 /* Does not change the other bits. */
2012                 FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
2013                 FAIL_IF(push_inst32(compiler, ins | RN4(src) | RD4(dst) | 1));
2014                 if (flags & SLJIT_SET_E) {
2015                         /* The condition must always be set, even if the ORRI/EORI is not executed above. */
2016                         if (reg_map[dst] <= 7)
2017                                 return push_inst16(compiler, MOVS | RD3(TMP_REG1) | RN3(dst));
2018                         return push_inst32(compiler, MOV_W | SET_FLAGS | RD4(TMP_REG1) | RM4(dst));
2019                 }
2020                 return SLJIT_SUCCESS;
2021         }
2022
2023         compiler->cache_arg = 0;
2024         compiler->cache_argw = 0;
2025         if (src & SLJIT_MEM) {
2026                 FAIL_IF(emit_op_mem2(compiler, WORD_SIZE, TMP_REG2, src, srcw, dst, dstw));
2027                 src = TMP_REG2;
2028                 srcw = 0;
2029         } else if (src & SLJIT_IMM) {
2030                 FAIL_IF(load_immediate(compiler, TMP_REG2, srcw));
2031                 src = TMP_REG2;
2032                 srcw = 0;
2033         }
2034
2035         if (op == SLJIT_AND || src != dst_r) {
2036                 FAIL_IF(push_inst16(compiler, IT | (cc << 4) | (((cc & 0x1) ^ 0x1) << 3) | 0x4));
2037                 FAIL_IF(push_inst32(compiler, ins | RN4(src) | RD4(dst_r) | 1));
2038                 FAIL_IF(push_inst32(compiler, ins | RN4(src) | RD4(dst_r) | 0));
2039         }
2040         else {
2041                 FAIL_IF(push_inst16(compiler, IT | (cc << 4) | 0x8));
2042                 FAIL_IF(push_inst32(compiler, ins | RN4(src) | RD4(dst_r) | 1));
2043         }
2044
2045         if (dst_r == TMP_REG2)
2046                 FAIL_IF(emit_op_mem2(compiler, WORD_SIZE | STORE, TMP_REG2, dst, dstw, 0, 0));
2047
2048         if (flags & SLJIT_SET_E) {
2049                 /* The condition must always be set, even if the ORR/EORI is not executed above. */
2050                 if (reg_map[dst_r] <= 7)
2051                         return push_inst16(compiler, MOVS | RD3(TMP_REG1) | RN3(dst_r));
2052                 return push_inst32(compiler, MOV_W | SET_FLAGS | RD4(TMP_REG1) | RM4(dst_r));
2053         }
2054         return SLJIT_SUCCESS;
2055 }
2056
2057 SLJIT_API_FUNC_ATTRIBUTE struct sljit_const* sljit_emit_const(struct sljit_compiler *compiler, sljit_s32 dst, sljit_sw dstw, sljit_sw init_value)
2058 {
2059         struct sljit_const *const_;
2060         sljit_s32 dst_r;
2061
2062         CHECK_ERROR_PTR();
2063         CHECK_PTR(check_sljit_emit_const(compiler, dst, dstw, init_value));
2064         ADJUST_LOCAL_OFFSET(dst, dstw);
2065
2066         const_ = (struct sljit_const*)ensure_abuf(compiler, sizeof(struct sljit_const));
2067         PTR_FAIL_IF(!const_);
2068         set_const(const_, compiler);
2069
2070         dst_r = SLOW_IS_REG(dst) ? dst : TMP_REG1;
2071         PTR_FAIL_IF(emit_imm32_const(compiler, dst_r, init_value));
2072
2073         if (dst & SLJIT_MEM)
2074                 PTR_FAIL_IF(emit_op_mem(compiler, WORD_SIZE | STORE, dst_r, dst, dstw));
2075         return const_;
2076 }
2077
2078 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_jump_addr(sljit_uw addr, sljit_uw new_addr)
2079 {
2080         sljit_u16 *inst = (sljit_u16*)addr;
2081         modify_imm32_const(inst, new_addr);
2082         SLJIT_CACHE_FLUSH(inst, inst + 4);
2083 }
2084
2085 SLJIT_API_FUNC_ATTRIBUTE void sljit_set_const(sljit_uw addr, sljit_sw new_constant)
2086 {
2087         sljit_u16 *inst = (sljit_u16*)addr;
2088         modify_imm32_const(inst, new_constant);
2089         SLJIT_CACHE_FLUSH(inst, inst + 4);
2090 }