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replay: replay BH for IDE trim operation
[qemu/ar7.git] / tcg / arm / tcg-target.inc.c
blobe1fbf465cb1b6708b83943de1630b551a0dc2089
1 /*
2 * Tiny Code Generator for QEMU
3 *
4 * Copyright (c) 2008 Andrzej Zaborowski
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #include "elf.h"
26 #include "tcg-pool.inc.c"
27
28 int arm_arch = __ARM_ARCH;
29
30 #ifndef use_idiv_instructions
31 bool use_idiv_instructions;
32 #endif
33
34 /* ??? Ought to think about changing CONFIG_SOFTMMU to always defined. */
35 #ifdef CONFIG_SOFTMMU
36 # define USING_SOFTMMU 1
37 #else
38 # define USING_SOFTMMU 0
39 #endif
40
41 #ifdef CONFIG_DEBUG_TCG
42 static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
43 "%r0",
44 "%r1",
45 "%r2",
46 "%r3",
47 "%r4",
48 "%r5",
49 "%r6",
50 "%r7",
51 "%r8",
52 "%r9",
53 "%r10",
54 "%r11",
55 "%r12",
56 "%r13",
57 "%r14",
58 "%pc",
59 };
60 #endif
61
62 static const int tcg_target_reg_alloc_order[] = {
63 TCG_REG_R4,
64 TCG_REG_R5,
65 TCG_REG_R6,
66 TCG_REG_R7,
67 TCG_REG_R8,
68 TCG_REG_R9,
69 TCG_REG_R10,
70 TCG_REG_R11,
71 TCG_REG_R13,
72 TCG_REG_R0,
73 TCG_REG_R1,
74 TCG_REG_R2,
75 TCG_REG_R3,
76 TCG_REG_R12,
77 TCG_REG_R14,
78 };
79
80 static const int tcg_target_call_iarg_regs[4] = {
81 TCG_REG_R0, TCG_REG_R1, TCG_REG_R2, TCG_REG_R3
82 };
83 static const int tcg_target_call_oarg_regs[2] = {
84 TCG_REG_R0, TCG_REG_R1
85 };
86
87 #define TCG_REG_TMP TCG_REG_R12
88
89 enum arm_cond_code_e {
90 COND_EQ = 0x0,
91 COND_NE = 0x1,
92 COND_CS = 0x2, /* Unsigned greater or equal */
93 COND_CC = 0x3, /* Unsigned less than */
94 COND_MI = 0x4, /* Negative */
95 COND_PL = 0x5, /* Zero or greater */
96 COND_VS = 0x6, /* Overflow */
97 COND_VC = 0x7, /* No overflow */
98 COND_HI = 0x8, /* Unsigned greater than */
99 COND_LS = 0x9, /* Unsigned less or equal */
100 COND_GE = 0xa,
101 COND_LT = 0xb,
102 COND_GT = 0xc,
103 COND_LE = 0xd,
104 COND_AL = 0xe,
105 };
106
107 #define TO_CPSR (1 << 20)
108
109 #define SHIFT_IMM_LSL(im) (((im) << 7) | 0x00)
110 #define SHIFT_IMM_LSR(im) (((im) << 7) | 0x20)
111 #define SHIFT_IMM_ASR(im) (((im) << 7) | 0x40)
112 #define SHIFT_IMM_ROR(im) (((im) << 7) | 0x60)
113 #define SHIFT_REG_LSL(rs) (((rs) << 8) | 0x10)
114 #define SHIFT_REG_LSR(rs) (((rs) << 8) | 0x30)
115 #define SHIFT_REG_ASR(rs) (((rs) << 8) | 0x50)
116 #define SHIFT_REG_ROR(rs) (((rs) << 8) | 0x70)
117
118 typedef enum {
119 ARITH_AND = 0x0 << 21,
120 ARITH_EOR = 0x1 << 21,
121 ARITH_SUB = 0x2 << 21,
122 ARITH_RSB = 0x3 << 21,
123 ARITH_ADD = 0x4 << 21,
124 ARITH_ADC = 0x5 << 21,
125 ARITH_SBC = 0x6 << 21,
126 ARITH_RSC = 0x7 << 21,
127 ARITH_TST = 0x8 << 21 | TO_CPSR,
128 ARITH_CMP = 0xa << 21 | TO_CPSR,
129 ARITH_CMN = 0xb << 21 | TO_CPSR,
130 ARITH_ORR = 0xc << 21,
131 ARITH_MOV = 0xd << 21,
132 ARITH_BIC = 0xe << 21,
133 ARITH_MVN = 0xf << 21,
134
135 INSN_CLZ = 0x016f0f10,
136 INSN_RBIT = 0x06ff0f30,
137
138 INSN_LDR_IMM = 0x04100000,
139 INSN_LDR_REG = 0x06100000,
140 INSN_STR_IMM = 0x04000000,
141 INSN_STR_REG = 0x06000000,
142
143 INSN_LDRH_IMM = 0x005000b0,
144 INSN_LDRH_REG = 0x001000b0,
145 INSN_LDRSH_IMM = 0x005000f0,
146 INSN_LDRSH_REG = 0x001000f0,
147 INSN_STRH_IMM = 0x004000b0,
148 INSN_STRH_REG = 0x000000b0,
149
150 INSN_LDRB_IMM = 0x04500000,
151 INSN_LDRB_REG = 0x06500000,
152 INSN_LDRSB_IMM = 0x005000d0,
153 INSN_LDRSB_REG = 0x001000d0,
154 INSN_STRB_IMM = 0x04400000,
155 INSN_STRB_REG = 0x06400000,
156
157 INSN_LDRD_IMM = 0x004000d0,
158 INSN_LDRD_REG = 0x000000d0,
159 INSN_STRD_IMM = 0x004000f0,
160 INSN_STRD_REG = 0x000000f0,
161
162 INSN_DMB_ISH = 0xf57ff05b,
163 INSN_DMB_MCR = 0xee070fba,
164
165 /* Architected nop introduced in v6k. */
166 /* ??? This is an MSR (imm) 0,0,0 insn. Anyone know if this
167 also Just So Happened to do nothing on pre-v6k so that we
168 don't need to conditionalize it? */
169 INSN_NOP_v6k = 0xe320f000,
170 /* Otherwise the assembler uses mov r0,r0 */
171 INSN_NOP_v4 = (COND_AL << 28) | ARITH_MOV,
172 } ARMInsn;
173
174 #define INSN_NOP (use_armv7_instructions ? INSN_NOP_v6k : INSN_NOP_v4)
175
176 static const uint8_t tcg_cond_to_arm_cond[] = {
177 [TCG_COND_EQ] = COND_EQ,
178 [TCG_COND_NE] = COND_NE,
179 [TCG_COND_LT] = COND_LT,
180 [TCG_COND_GE] = COND_GE,
181 [TCG_COND_LE] = COND_LE,
182 [TCG_COND_GT] = COND_GT,
183 /* unsigned */
184 [TCG_COND_LTU] = COND_CC,
185 [TCG_COND_GEU] = COND_CS,
186 [TCG_COND_LEU] = COND_LS,
187 [TCG_COND_GTU] = COND_HI,
188 };
189
190 static inline void reloc_pc24(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
191 {
192 ptrdiff_t offset = (tcg_ptr_byte_diff(target, code_ptr) - 8) >> 2;
193 *code_ptr = (*code_ptr & ~0xffffff) | (offset & 0xffffff);
194 }
195
196 static inline void reloc_pc24_atomic(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
197 {
198 ptrdiff_t offset = (tcg_ptr_byte_diff(target, code_ptr) - 8) >> 2;
199 tcg_insn_unit insn = atomic_read(code_ptr);
200 tcg_debug_assert(offset == sextract32(offset, 0, 24));
201 atomic_set(code_ptr, deposit32(insn, 0, 24, offset));
202 }
203
204 static void patch_reloc(tcg_insn_unit *code_ptr, int type,
205 intptr_t value, intptr_t addend)
206 {
207 tcg_debug_assert(addend == 0);
208
209 if (type == R_ARM_PC24) {
210 reloc_pc24(code_ptr, (tcg_insn_unit *)value);
211 } else if (type == R_ARM_PC13) {
212 intptr_t diff = value - (uintptr_t)(code_ptr + 2);
213 tcg_insn_unit insn = *code_ptr;
214 bool u;
215
216 if (diff >= -0xfff && diff <= 0xfff) {
217 u = (diff >= 0);
218 if (!u) {
219 diff = -diff;
220 }
221 } else {
222 int rd = extract32(insn, 12, 4);
223 int rt = rd == TCG_REG_PC ? TCG_REG_TMP : rd;
224 assert(diff >= 0x1000 && diff < 0x100000);
225 /* add rt, pc, #high */
226 *code_ptr++ = ((insn & 0xf0000000) | (1 << 25) | ARITH_ADD
227 | (TCG_REG_PC << 16) | (rt << 12)
228 | (20 << 7) | (diff >> 12));
229 /* ldr rd, [rt, #low] */
230 insn = deposit32(insn, 12, 4, rt);
231 diff &= 0xfff;
232 u = 1;
233 }
234 insn = deposit32(insn, 23, 1, u);
235 insn = deposit32(insn, 0, 12, diff);
236 *code_ptr = insn;
237 } else {
238 g_assert_not_reached();
239 }
240 }
241
242 #define TCG_CT_CONST_ARM 0x100
243 #define TCG_CT_CONST_INV 0x200
244 #define TCG_CT_CONST_NEG 0x400
245 #define TCG_CT_CONST_ZERO 0x800
246
247 /* parse target specific constraints */
248 static const char *target_parse_constraint(TCGArgConstraint *ct,
249 const char *ct_str, TCGType type)
250 {
251 switch (*ct_str++) {
252 case 'I':
253 ct->ct |= TCG_CT_CONST_ARM;
254 break;
255 case 'K':
256 ct->ct |= TCG_CT_CONST_INV;
257 break;
258 case 'N': /* The gcc constraint letter is L, already used here. */
259 ct->ct |= TCG_CT_CONST_NEG;
260 break;
261 case 'Z':
262 ct->ct |= TCG_CT_CONST_ZERO;
263 break;
264
265 case 'r':
266 ct->ct |= TCG_CT_REG;
267 ct->u.regs = 0xffff;
268 break;
269
270 /* qemu_ld address */
271 case 'l':
272 ct->ct |= TCG_CT_REG;
273 ct->u.regs = 0xffff;
274 #ifdef CONFIG_SOFTMMU
275 /* r0-r2,lr will be overwritten when reading the tlb entry,
276 so don't use these. */
277 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
278 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
279 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2);
280 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R14);
281 #endif
282 break;
283
284 /* qemu_st address & data */
285 case 's':
286 ct->ct |= TCG_CT_REG;
287 ct->u.regs = 0xffff;
288 /* r0-r2 will be overwritten when reading the tlb entry (softmmu only)
289 and r0-r1 doing the byte swapping, so don't use these. */
290 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
291 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
292 #if defined(CONFIG_SOFTMMU)
293 /* Avoid clashes with registers being used for helper args */
294 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2);
295 #if TARGET_LONG_BITS == 64
296 /* Avoid clashes with registers being used for helper args */
297 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R3);
298 #endif
299 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R14);
300 #endif
301 break;
302
303 default:
304 return NULL;
305 }
306 return ct_str;
307 }
308
309 static inline uint32_t rotl(uint32_t val, int n)
310 {
311 return (val << n) | (val >> (32 - n));
312 }
313
314 /* ARM immediates for ALU instructions are made of an unsigned 8-bit
315 right-rotated by an even amount between 0 and 30. */
316 static inline int encode_imm(uint32_t imm)
317 {
318 int shift;
319
320 /* simple case, only lower bits */
321 if ((imm & ~0xff) == 0)
322 return 0;
323 /* then try a simple even shift */
324 shift = ctz32(imm) & ~1;
325 if (((imm >> shift) & ~0xff) == 0)
326 return 32 - shift;
327 /* now try harder with rotations */
328 if ((rotl(imm, 2) & ~0xff) == 0)
329 return 2;
330 if ((rotl(imm, 4) & ~0xff) == 0)
331 return 4;
332 if ((rotl(imm, 6) & ~0xff) == 0)
333 return 6;
334 /* imm can't be encoded */
335 return -1;
336 }
337
338 static inline int check_fit_imm(uint32_t imm)
339 {
340 return encode_imm(imm) >= 0;
341 }
342
343 /* Test if a constant matches the constraint.
344 * TODO: define constraints for:
345 *
346 * ldr/str offset: between -0xfff and 0xfff
347 * ldrh/strh offset: between -0xff and 0xff
348 * mov operand2: values represented with x << (2 * y), x < 0x100
349 * add, sub, eor...: ditto
350 */
351 static inline int tcg_target_const_match(tcg_target_long val, TCGType type,
352 const TCGArgConstraint *arg_ct)
353 {
354 int ct;
355 ct = arg_ct->ct;
356 if (ct & TCG_CT_CONST) {
357 return 1;
358 } else if ((ct & TCG_CT_CONST_ARM) && check_fit_imm(val)) {
359 return 1;
360 } else if ((ct & TCG_CT_CONST_INV) && check_fit_imm(~val)) {
361 return 1;
362 } else if ((ct & TCG_CT_CONST_NEG) && check_fit_imm(-val)) {
363 return 1;
364 } else if ((ct & TCG_CT_CONST_ZERO) && val == 0) {
365 return 1;
366 } else {
367 return 0;
368 }
369 }
370
371 static inline void tcg_out_b(TCGContext *s, int cond, int32_t offset)
372 {
373 tcg_out32(s, (cond << 28) | 0x0a000000 |
374 (((offset - 8) >> 2) & 0x00ffffff));
375 }
376
377 static inline void tcg_out_b_noaddr(TCGContext *s, int cond)
378 {
379 /* We pay attention here to not modify the branch target by masking
380 the corresponding bytes. This ensure that caches and memory are
381 kept coherent during retranslation. */
382 tcg_out32(s, deposit32(*s->code_ptr, 24, 8, (cond << 4) | 0x0a));
383 }
384
385 static inline void tcg_out_bl_noaddr(TCGContext *s, int cond)
386 {
387 /* We pay attention here to not modify the branch target by masking
388 the corresponding bytes. This ensure that caches and memory are
389 kept coherent during retranslation. */
390 tcg_out32(s, deposit32(*s->code_ptr, 24, 8, (cond << 4) | 0x0b));
391 }
392
393 static inline void tcg_out_bl(TCGContext *s, int cond, int32_t offset)
394 {
395 tcg_out32(s, (cond << 28) | 0x0b000000 |
396 (((offset - 8) >> 2) & 0x00ffffff));
397 }
398
399 static inline void tcg_out_blx(TCGContext *s, int cond, int rn)
400 {
401 tcg_out32(s, (cond << 28) | 0x012fff30 | rn);
402 }
403
404 static inline void tcg_out_blx_imm(TCGContext *s, int32_t offset)
405 {
406 tcg_out32(s, 0xfa000000 | ((offset & 2) << 23) |
407 (((offset - 8) >> 2) & 0x00ffffff));
408 }
409
410 static inline void tcg_out_dat_reg(TCGContext *s,
411 int cond, int opc, int rd, int rn, int rm, int shift)
412 {
413 tcg_out32(s, (cond << 28) | (0 << 25) | opc |
414 (rn << 16) | (rd << 12) | shift | rm);
415 }
416
417 static inline void tcg_out_nop(TCGContext *s)
418 {
419 tcg_out32(s, INSN_NOP);
420 }
421
422 static inline void tcg_out_mov_reg(TCGContext *s, int cond, int rd, int rm)
423 {
424 /* Simple reg-reg move, optimising out the 'do nothing' case */
425 if (rd != rm) {
426 tcg_out_dat_reg(s, cond, ARITH_MOV, rd, 0, rm, SHIFT_IMM_LSL(0));
427 }
428 }
429
430 static inline void tcg_out_bx(TCGContext *s, int cond, TCGReg rn)
431 {
432 /* Unless the C portion of QEMU is compiled as thumb, we don't
433 actually need true BX semantics; merely a branch to an address
434 held in a register. */
435 if (use_armv5t_instructions) {
436 tcg_out32(s, (cond << 28) | 0x012fff10 | rn);
437 } else {
438 tcg_out_mov_reg(s, cond, TCG_REG_PC, rn);
439 }
440 }
441
442 static inline void tcg_out_dat_imm(TCGContext *s,
443 int cond, int opc, int rd, int rn, int im)
444 {
445 tcg_out32(s, (cond << 28) | (1 << 25) | opc |
446 (rn << 16) | (rd << 12) | im);
447 }
448
449 /* Note that this routine is used for both LDR and LDRH formats, so we do
450 not wish to include an immediate shift at this point. */
451 static void tcg_out_memop_r(TCGContext *s, int cond, ARMInsn opc, TCGReg rt,
452 TCGReg rn, TCGReg rm, bool u, bool p, bool w)
453 {
454 tcg_out32(s, (cond << 28) | opc | (u << 23) | (p << 24)
455 | (w << 21) | (rn << 16) | (rt << 12) | rm);
456 }
457
458 static void tcg_out_memop_8(TCGContext *s, int cond, ARMInsn opc, TCGReg rt,
459 TCGReg rn, int imm8, bool p, bool w)
460 {
461 bool u = 1;
462 if (imm8 < 0) {
463 imm8 = -imm8;
464 u = 0;
465 }
466 tcg_out32(s, (cond << 28) | opc | (u << 23) | (p << 24) | (w << 21) |
467 (rn << 16) | (rt << 12) | ((imm8 & 0xf0) << 4) | (imm8 & 0xf));
468 }
469
470 static void tcg_out_memop_12(TCGContext *s, int cond, ARMInsn opc, TCGReg rt,
471 TCGReg rn, int imm12, bool p, bool w)
472 {
473 bool u = 1;
474 if (imm12 < 0) {
475 imm12 = -imm12;
476 u = 0;
477 }
478 tcg_out32(s, (cond << 28) | opc | (u << 23) | (p << 24) | (w << 21) |
479 (rn << 16) | (rt << 12) | imm12);
480 }
481
482 static inline void tcg_out_ld32_12(TCGContext *s, int cond, TCGReg rt,
483 TCGReg rn, int imm12)
484 {
485 tcg_out_memop_12(s, cond, INSN_LDR_IMM, rt, rn, imm12, 1, 0);
486 }
487
488 static inline void tcg_out_st32_12(TCGContext *s, int cond, TCGReg rt,
489 TCGReg rn, int imm12)
490 {
491 tcg_out_memop_12(s, cond, INSN_STR_IMM, rt, rn, imm12, 1, 0);
492 }
493
494 static inline void tcg_out_ld32_r(TCGContext *s, int cond, TCGReg rt,
495 TCGReg rn, TCGReg rm)
496 {
497 tcg_out_memop_r(s, cond, INSN_LDR_REG, rt, rn, rm, 1, 1, 0);
498 }
499
500 static inline void tcg_out_st32_r(TCGContext *s, int cond, TCGReg rt,
501 TCGReg rn, TCGReg rm)
502 {
503 tcg_out_memop_r(s, cond, INSN_STR_REG, rt, rn, rm, 1, 1, 0);
504 }
505
506 static inline void tcg_out_ldrd_8(TCGContext *s, int cond, TCGReg rt,
507 TCGReg rn, int imm8)
508 {
509 tcg_out_memop_8(s, cond, INSN_LDRD_IMM, rt, rn, imm8, 1, 0);
510 }
511
512 static inline void tcg_out_ldrd_r(TCGContext *s, int cond, TCGReg rt,
513 TCGReg rn, TCGReg rm)
514 {
515 tcg_out_memop_r(s, cond, INSN_LDRD_REG, rt, rn, rm, 1, 1, 0);
516 }
517
518 static inline void tcg_out_strd_8(TCGContext *s, int cond, TCGReg rt,
519 TCGReg rn, int imm8)
520 {
521 tcg_out_memop_8(s, cond, INSN_STRD_IMM, rt, rn, imm8, 1, 0);
522 }
523
524 static inline void tcg_out_strd_r(TCGContext *s, int cond, TCGReg rt,
525 TCGReg rn, TCGReg rm)
526 {
527 tcg_out_memop_r(s, cond, INSN_STRD_REG, rt, rn, rm, 1, 1, 0);
528 }
529
530 /* Register pre-increment with base writeback. */
531 static inline void tcg_out_ld32_rwb(TCGContext *s, int cond, TCGReg rt,
532 TCGReg rn, TCGReg rm)
533 {
534 tcg_out_memop_r(s, cond, INSN_LDR_REG, rt, rn, rm, 1, 1, 1);
535 }
536
537 static inline void tcg_out_st32_rwb(TCGContext *s, int cond, TCGReg rt,
538 TCGReg rn, TCGReg rm)
539 {
540 tcg_out_memop_r(s, cond, INSN_STR_REG, rt, rn, rm, 1, 1, 1);
541 }
542
543 static inline void tcg_out_ld16u_8(TCGContext *s, int cond, TCGReg rt,
544 TCGReg rn, int imm8)
545 {
546 tcg_out_memop_8(s, cond, INSN_LDRH_IMM, rt, rn, imm8, 1, 0);
547 }
548
549 static inline void tcg_out_st16_8(TCGContext *s, int cond, TCGReg rt,
550 TCGReg rn, int imm8)
551 {
552 tcg_out_memop_8(s, cond, INSN_STRH_IMM, rt, rn, imm8, 1, 0);
553 }
554
555 static inline void tcg_out_ld16u_r(TCGContext *s, int cond, TCGReg rt,
556 TCGReg rn, TCGReg rm)
557 {
558 tcg_out_memop_r(s, cond, INSN_LDRH_REG, rt, rn, rm, 1, 1, 0);
559 }
560
561 static inline void tcg_out_st16_r(TCGContext *s, int cond, TCGReg rt,
562 TCGReg rn, TCGReg rm)
563 {
564 tcg_out_memop_r(s, cond, INSN_STRH_REG, rt, rn, rm, 1, 1, 0);
565 }
566
567 static inline void tcg_out_ld16s_8(TCGContext *s, int cond, TCGReg rt,
568 TCGReg rn, int imm8)
569 {
570 tcg_out_memop_8(s, cond, INSN_LDRSH_IMM, rt, rn, imm8, 1, 0);
571 }
572
573 static inline void tcg_out_ld16s_r(TCGContext *s, int cond, TCGReg rt,
574 TCGReg rn, TCGReg rm)
575 {
576 tcg_out_memop_r(s, cond, INSN_LDRSH_REG, rt, rn, rm, 1, 1, 0);
577 }
578
579 static inline void tcg_out_ld8_12(TCGContext *s, int cond, TCGReg rt,
580 TCGReg rn, int imm12)
581 {
582 tcg_out_memop_12(s, cond, INSN_LDRB_IMM, rt, rn, imm12, 1, 0);
583 }
584
585 static inline void tcg_out_st8_12(TCGContext *s, int cond, TCGReg rt,
586 TCGReg rn, int imm12)
587 {
588 tcg_out_memop_12(s, cond, INSN_STRB_IMM, rt, rn, imm12, 1, 0);
589 }
590
591 static inline void tcg_out_ld8_r(TCGContext *s, int cond, TCGReg rt,
592 TCGReg rn, TCGReg rm)
593 {
594 tcg_out_memop_r(s, cond, INSN_LDRB_REG, rt, rn, rm, 1, 1, 0);
595 }
596
597 static inline void tcg_out_st8_r(TCGContext *s, int cond, TCGReg rt,
598 TCGReg rn, TCGReg rm)
599 {
600 tcg_out_memop_r(s, cond, INSN_STRB_REG, rt, rn, rm, 1, 1, 0);
601 }
602
603 static inline void tcg_out_ld8s_8(TCGContext *s, int cond, TCGReg rt,
604 TCGReg rn, int imm8)
605 {
606 tcg_out_memop_8(s, cond, INSN_LDRSB_IMM, rt, rn, imm8, 1, 0);
607 }
608
609 static inline void tcg_out_ld8s_r(TCGContext *s, int cond, TCGReg rt,
610 TCGReg rn, TCGReg rm)
611 {
612 tcg_out_memop_r(s, cond, INSN_LDRSB_REG, rt, rn, rm, 1, 1, 0);
613 }
614
615 static void tcg_out_movi_pool(TCGContext *s, int cond, int rd, uint32_t arg)
616 {
617 /* The 12-bit range on the ldr insn is sometimes a bit too small.
618 In order to get around that we require two insns, one of which
619 will usually be a nop, but may be replaced in patch_reloc. */
620 new_pool_label(s, arg, R_ARM_PC13, s->code_ptr, 0);
621 tcg_out_ld32_12(s, cond, rd, TCG_REG_PC, 0);
622 tcg_out_nop(s);
623 }
624
625 static void tcg_out_movi32(TCGContext *s, int cond, int rd, uint32_t arg)
626 {
627 int rot, diff, opc, sh1, sh2;
628 uint32_t tt0, tt1, tt2;
629
630 /* Check a single MOV/MVN before anything else. */
631 rot = encode_imm(arg);
632 if (rot >= 0) {
633 tcg_out_dat_imm(s, cond, ARITH_MOV, rd, 0,
634 rotl(arg, rot) | (rot << 7));
635 return;
636 }
637 rot = encode_imm(~arg);
638 if (rot >= 0) {
639 tcg_out_dat_imm(s, cond, ARITH_MVN, rd, 0,
640 rotl(~arg, rot) | (rot << 7));
641 return;
642 }
643
644 /* Check for a pc-relative address. This will usually be the TB,
645 or within the TB, which is immediately before the code block. */
646 diff = arg - ((intptr_t)s->code_ptr + 8);
647 if (diff >= 0) {
648 rot = encode_imm(diff);
649 if (rot >= 0) {
650 tcg_out_dat_imm(s, cond, ARITH_ADD, rd, TCG_REG_PC,
651 rotl(diff, rot) | (rot << 7));
652 return;
653 }
654 } else {
655 rot = encode_imm(-diff);
656 if (rot >= 0) {
657 tcg_out_dat_imm(s, cond, ARITH_SUB, rd, TCG_REG_PC,
658 rotl(-diff, rot) | (rot << 7));
659 return;
660 }
661 }
662
663 /* Use movw + movt. */
664 if (use_armv7_instructions) {
665 /* movw */
666 tcg_out32(s, (cond << 28) | 0x03000000 | (rd << 12)
667 | ((arg << 4) & 0x000f0000) | (arg & 0xfff));
668 if (arg & 0xffff0000) {
669 /* movt */
670 tcg_out32(s, (cond << 28) | 0x03400000 | (rd << 12)
671 | ((arg >> 12) & 0x000f0000) | ((arg >> 16) & 0xfff));
672 }
673 return;
674 }
675
676 /* Look for sequences of two insns. If we have lots of 1's, we can
677 shorten the sequence by beginning with mvn and then clearing
678 higher bits with eor. */
679 tt0 = arg;
680 opc = ARITH_MOV;
681 if (ctpop32(arg) > 16) {
682 tt0 = ~arg;
683 opc = ARITH_MVN;
684 }
685 sh1 = ctz32(tt0) & ~1;
686 tt1 = tt0 & ~(0xff << sh1);
687 sh2 = ctz32(tt1) & ~1;
688 tt2 = tt1 & ~(0xff << sh2);
689 if (tt2 == 0) {
690 rot = ((32 - sh1) << 7) & 0xf00;
691 tcg_out_dat_imm(s, cond, opc, rd, 0, ((tt0 >> sh1) & 0xff) | rot);
692 rot = ((32 - sh2) << 7) & 0xf00;
693 tcg_out_dat_imm(s, cond, ARITH_EOR, rd, rd,
694 ((tt0 >> sh2) & 0xff) | rot);
695 return;
696 }
697
698 /* Otherwise, drop it into the constant pool. */
699 tcg_out_movi_pool(s, cond, rd, arg);
700 }
701
702 static inline void tcg_out_dat_rI(TCGContext *s, int cond, int opc, TCGArg dst,
703 TCGArg lhs, TCGArg rhs, int rhs_is_const)
704 {
705 /* Emit either the reg,imm or reg,reg form of a data-processing insn.
706 * rhs must satisfy the "rI" constraint.
707 */
708 if (rhs_is_const) {
709 int rot = encode_imm(rhs);
710 tcg_debug_assert(rot >= 0);
711 tcg_out_dat_imm(s, cond, opc, dst, lhs, rotl(rhs, rot) | (rot << 7));
712 } else {
713 tcg_out_dat_reg(s, cond, opc, dst, lhs, rhs, SHIFT_IMM_LSL(0));
714 }
715 }
716
717 static void tcg_out_dat_rIK(TCGContext *s, int cond, int opc, int opinv,
718 TCGReg dst, TCGReg lhs, TCGArg rhs,
719 bool rhs_is_const)
720 {
721 /* Emit either the reg,imm or reg,reg form of a data-processing insn.
722 * rhs must satisfy the "rIK" constraint.
723 */
724 if (rhs_is_const) {
725 int rot = encode_imm(rhs);
726 if (rot < 0) {
727 rhs = ~rhs;
728 rot = encode_imm(rhs);
729 tcg_debug_assert(rot >= 0);
730 opc = opinv;
731 }
732 tcg_out_dat_imm(s, cond, opc, dst, lhs, rotl(rhs, rot) | (rot << 7));
733 } else {
734 tcg_out_dat_reg(s, cond, opc, dst, lhs, rhs, SHIFT_IMM_LSL(0));
735 }
736 }
737
738 static void tcg_out_dat_rIN(TCGContext *s, int cond, int opc, int opneg,
739 TCGArg dst, TCGArg lhs, TCGArg rhs,
740 bool rhs_is_const)
741 {
742 /* Emit either the reg,imm or reg,reg form of a data-processing insn.
743 * rhs must satisfy the "rIN" constraint.
744 */
745 if (rhs_is_const) {
746 int rot = encode_imm(rhs);
747 if (rot < 0) {
748 rhs = -rhs;
749 rot = encode_imm(rhs);
750 tcg_debug_assert(rot >= 0);
751 opc = opneg;
752 }
753 tcg_out_dat_imm(s, cond, opc, dst, lhs, rotl(rhs, rot) | (rot << 7));
754 } else {
755 tcg_out_dat_reg(s, cond, opc, dst, lhs, rhs, SHIFT_IMM_LSL(0));
756 }
757 }
758
759 static inline void tcg_out_mul32(TCGContext *s, int cond, TCGReg rd,
760 TCGReg rn, TCGReg rm)
761 {
762 /* if ArchVersion() < 6 && d == n then UNPREDICTABLE; */
763 if (!use_armv6_instructions && rd == rn) {
764 if (rd == rm) {
765 /* rd == rn == rm; copy an input to tmp first. */
766 tcg_out_mov_reg(s, cond, TCG_REG_TMP, rn);
767 rm = rn = TCG_REG_TMP;
768 } else {
769 rn = rm;
770 rm = rd;
771 }
772 }
773 /* mul */
774 tcg_out32(s, (cond << 28) | 0x90 | (rd << 16) | (rm << 8) | rn);
775 }
776
777 static inline void tcg_out_umull32(TCGContext *s, int cond, TCGReg rd0,
778 TCGReg rd1, TCGReg rn, TCGReg rm)
779 {
780 /* if ArchVersion() < 6 && (dHi == n || dLo == n) then UNPREDICTABLE; */
781 if (!use_armv6_instructions && (rd0 == rn || rd1 == rn)) {
782 if (rd0 == rm || rd1 == rm) {
783 tcg_out_mov_reg(s, cond, TCG_REG_TMP, rn);
784 rn = TCG_REG_TMP;
785 } else {
786 TCGReg t = rn;
787 rn = rm;
788 rm = t;
789 }
790 }
791 /* umull */
792 tcg_out32(s, (cond << 28) | 0x00800090 |
793 (rd1 << 16) | (rd0 << 12) | (rm << 8) | rn);
794 }
795
796 static inline void tcg_out_smull32(TCGContext *s, int cond, TCGReg rd0,
797 TCGReg rd1, TCGReg rn, TCGReg rm)
798 {
799 /* if ArchVersion() < 6 && (dHi == n || dLo == n) then UNPREDICTABLE; */
800 if (!use_armv6_instructions && (rd0 == rn || rd1 == rn)) {
801 if (rd0 == rm || rd1 == rm) {
802 tcg_out_mov_reg(s, cond, TCG_REG_TMP, rn);
803 rn = TCG_REG_TMP;
804 } else {
805 TCGReg t = rn;
806 rn = rm;
807 rm = t;
808 }
809 }
810 /* smull */
811 tcg_out32(s, (cond << 28) | 0x00c00090 |
812 (rd1 << 16) | (rd0 << 12) | (rm << 8) | rn);
813 }
814
815 static inline void tcg_out_sdiv(TCGContext *s, int cond, int rd, int rn, int rm)
816 {
817 tcg_out32(s, 0x0710f010 | (cond << 28) | (rd << 16) | rn | (rm << 8));
818 }
819
820 static inline void tcg_out_udiv(TCGContext *s, int cond, int rd, int rn, int rm)
821 {
822 tcg_out32(s, 0x0730f010 | (cond << 28) | (rd << 16) | rn | (rm << 8));
823 }
824
825 static inline void tcg_out_ext8s(TCGContext *s, int cond,
826 int rd, int rn)
827 {
828 if (use_armv6_instructions) {
829 /* sxtb */
830 tcg_out32(s, 0x06af0070 | (cond << 28) | (rd << 12) | rn);
831 } else {
832 tcg_out_dat_reg(s, cond, ARITH_MOV,
833 rd, 0, rn, SHIFT_IMM_LSL(24));
834 tcg_out_dat_reg(s, cond, ARITH_MOV,
835 rd, 0, rd, SHIFT_IMM_ASR(24));
836 }
837 }
838
839 static inline void tcg_out_ext8u(TCGContext *s, int cond,
840 int rd, int rn)
841 {
842 tcg_out_dat_imm(s, cond, ARITH_AND, rd, rn, 0xff);
843 }
844
845 static inline void tcg_out_ext16s(TCGContext *s, int cond,
846 int rd, int rn)
847 {
848 if (use_armv6_instructions) {
849 /* sxth */
850 tcg_out32(s, 0x06bf0070 | (cond << 28) | (rd << 12) | rn);
851 } else {
852 tcg_out_dat_reg(s, cond, ARITH_MOV,
853 rd, 0, rn, SHIFT_IMM_LSL(16));
854 tcg_out_dat_reg(s, cond, ARITH_MOV,
855 rd, 0, rd, SHIFT_IMM_ASR(16));
856 }
857 }
858
859 static inline void tcg_out_ext16u(TCGContext *s, int cond,
860 int rd, int rn)
861 {
862 if (use_armv6_instructions) {
863 /* uxth */
864 tcg_out32(s, 0x06ff0070 | (cond << 28) | (rd << 12) | rn);
865 } else {
866 tcg_out_dat_reg(s, cond, ARITH_MOV,
867 rd, 0, rn, SHIFT_IMM_LSL(16));
868 tcg_out_dat_reg(s, cond, ARITH_MOV,
869 rd, 0, rd, SHIFT_IMM_LSR(16));
870 }
871 }
872
873 static inline void tcg_out_bswap16s(TCGContext *s, int cond, int rd, int rn)
874 {
875 if (use_armv6_instructions) {
876 /* revsh */
877 tcg_out32(s, 0x06ff0fb0 | (cond << 28) | (rd << 12) | rn);
878 } else {
879 tcg_out_dat_reg(s, cond, ARITH_MOV,
880 TCG_REG_TMP, 0, rn, SHIFT_IMM_LSL(24));
881 tcg_out_dat_reg(s, cond, ARITH_MOV,
882 TCG_REG_TMP, 0, TCG_REG_TMP, SHIFT_IMM_ASR(16));
883 tcg_out_dat_reg(s, cond, ARITH_ORR,
884 rd, TCG_REG_TMP, rn, SHIFT_IMM_LSR(8));
885 }
886 }
887
888 static inline void tcg_out_bswap16(TCGContext *s, int cond, int rd, int rn)
889 {
890 if (use_armv6_instructions) {
891 /* rev16 */
892 tcg_out32(s, 0x06bf0fb0 | (cond << 28) | (rd << 12) | rn);
893 } else {
894 tcg_out_dat_reg(s, cond, ARITH_MOV,
895 TCG_REG_TMP, 0, rn, SHIFT_IMM_LSL(24));
896 tcg_out_dat_reg(s, cond, ARITH_MOV,
897 TCG_REG_TMP, 0, TCG_REG_TMP, SHIFT_IMM_LSR(16));
898 tcg_out_dat_reg(s, cond, ARITH_ORR,
899 rd, TCG_REG_TMP, rn, SHIFT_IMM_LSR(8));
900 }
901 }
902
903 /* swap the two low bytes assuming that the two high input bytes and the
904 two high output bit can hold any value. */
905 static inline void tcg_out_bswap16st(TCGContext *s, int cond, int rd, int rn)
906 {
907 if (use_armv6_instructions) {
908 /* rev16 */
909 tcg_out32(s, 0x06bf0fb0 | (cond << 28) | (rd << 12) | rn);
910 } else {
911 tcg_out_dat_reg(s, cond, ARITH_MOV,
912 TCG_REG_TMP, 0, rn, SHIFT_IMM_LSR(8));
913 tcg_out_dat_imm(s, cond, ARITH_AND, TCG_REG_TMP, TCG_REG_TMP, 0xff);
914 tcg_out_dat_reg(s, cond, ARITH_ORR,
915 rd, TCG_REG_TMP, rn, SHIFT_IMM_LSL(8));
916 }
917 }
918
919 static inline void tcg_out_bswap32(TCGContext *s, int cond, int rd, int rn)
920 {
921 if (use_armv6_instructions) {
922 /* rev */
923 tcg_out32(s, 0x06bf0f30 | (cond << 28) | (rd << 12) | rn);
924 } else {
925 tcg_out_dat_reg(s, cond, ARITH_EOR,
926 TCG_REG_TMP, rn, rn, SHIFT_IMM_ROR(16));
927 tcg_out_dat_imm(s, cond, ARITH_BIC,
928 TCG_REG_TMP, TCG_REG_TMP, 0xff | 0x800);
929 tcg_out_dat_reg(s, cond, ARITH_MOV,
930 rd, 0, rn, SHIFT_IMM_ROR(8));
931 tcg_out_dat_reg(s, cond, ARITH_EOR,
932 rd, rd, TCG_REG_TMP, SHIFT_IMM_LSR(8));
933 }
934 }
935
936 static inline void tcg_out_deposit(TCGContext *s, int cond, TCGReg rd,
937 TCGArg a1, int ofs, int len, bool const_a1)
938 {
939 if (const_a1) {
940 /* bfi becomes bfc with rn == 15. */
941 a1 = 15;
942 }
943 /* bfi/bfc */
944 tcg_out32(s, 0x07c00010 | (cond << 28) | (rd << 12) | a1
945 | (ofs << 7) | ((ofs + len - 1) << 16));
946 }
947
948 static inline void tcg_out_extract(TCGContext *s, int cond, TCGReg rd,
949 TCGArg a1, int ofs, int len)
950 {
951 /* ubfx */
952 tcg_out32(s, 0x07e00050 | (cond << 28) | (rd << 12) | a1
953 | (ofs << 7) | ((len - 1) << 16));
954 }
955
956 static inline void tcg_out_sextract(TCGContext *s, int cond, TCGReg rd,
957 TCGArg a1, int ofs, int len)
958 {
959 /* sbfx */
960 tcg_out32(s, 0x07a00050 | (cond << 28) | (rd << 12) | a1
961 | (ofs << 7) | ((len - 1) << 16));
962 }
963
964 static inline void tcg_out_ld32u(TCGContext *s, int cond,
965 int rd, int rn, int32_t offset)
966 {
967 if (offset > 0xfff || offset < -0xfff) {
968 tcg_out_movi32(s, cond, TCG_REG_TMP, offset);
969 tcg_out_ld32_r(s, cond, rd, rn, TCG_REG_TMP);
970 } else
971 tcg_out_ld32_12(s, cond, rd, rn, offset);
972 }
973
974 static inline void tcg_out_st32(TCGContext *s, int cond,
975 int rd, int rn, int32_t offset)
976 {
977 if (offset > 0xfff || offset < -0xfff) {
978 tcg_out_movi32(s, cond, TCG_REG_TMP, offset);
979 tcg_out_st32_r(s, cond, rd, rn, TCG_REG_TMP);
980 } else
981 tcg_out_st32_12(s, cond, rd, rn, offset);
982 }
983
984 static inline void tcg_out_ld16u(TCGContext *s, int cond,
985 int rd, int rn, int32_t offset)
986 {
987 if (offset > 0xff || offset < -0xff) {
988 tcg_out_movi32(s, cond, TCG_REG_TMP, offset);
989 tcg_out_ld16u_r(s, cond, rd, rn, TCG_REG_TMP);
990 } else
991 tcg_out_ld16u_8(s, cond, rd, rn, offset);
992 }
993
994 static inline void tcg_out_ld16s(TCGContext *s, int cond,
995 int rd, int rn, int32_t offset)
996 {
997 if (offset > 0xff || offset < -0xff) {
998 tcg_out_movi32(s, cond, TCG_REG_TMP, offset);
999 tcg_out_ld16s_r(s, cond, rd, rn, TCG_REG_TMP);
1000 } else
1001 tcg_out_ld16s_8(s, cond, rd, rn, offset);
1002 }
1003
1004 static inline void tcg_out_st16(TCGContext *s, int cond,
1005 int rd, int rn, int32_t offset)
1006 {
1007 if (offset > 0xff || offset < -0xff) {
1008 tcg_out_movi32(s, cond, TCG_REG_TMP, offset);
1009 tcg_out_st16_r(s, cond, rd, rn, TCG_REG_TMP);
1010 } else
1011 tcg_out_st16_8(s, cond, rd, rn, offset);
1012 }
1013
1014 static inline void tcg_out_ld8u(TCGContext *s, int cond,
1015 int rd, int rn, int32_t offset)
1016 {
1017 if (offset > 0xfff || offset < -0xfff) {
1018 tcg_out_movi32(s, cond, TCG_REG_TMP, offset);
1019 tcg_out_ld8_r(s, cond, rd, rn, TCG_REG_TMP);
1020 } else
1021 tcg_out_ld8_12(s, cond, rd, rn, offset);
1022 }
1023
1024 static inline void tcg_out_ld8s(TCGContext *s, int cond,
1025 int rd, int rn, int32_t offset)
1026 {
1027 if (offset > 0xff || offset < -0xff) {
1028 tcg_out_movi32(s, cond, TCG_REG_TMP, offset);
1029 tcg_out_ld8s_r(s, cond, rd, rn, TCG_REG_TMP);
1030 } else
1031 tcg_out_ld8s_8(s, cond, rd, rn, offset);
1032 }
1033
1034 static inline void tcg_out_st8(TCGContext *s, int cond,
1035 int rd, int rn, int32_t offset)
1036 {
1037 if (offset > 0xfff || offset < -0xfff) {
1038 tcg_out_movi32(s, cond, TCG_REG_TMP, offset);
1039 tcg_out_st8_r(s, cond, rd, rn, TCG_REG_TMP);
1040 } else
1041 tcg_out_st8_12(s, cond, rd, rn, offset);
1042 }
1043
1044 /* The _goto case is normally between TBs within the same code buffer, and
1045 * with the code buffer limited to 16MB we wouldn't need the long case.
1046 * But we also use it for the tail-call to the qemu_ld/st helpers, which does.
1047 */
1048 static void tcg_out_goto(TCGContext *s, int cond, tcg_insn_unit *addr)
1049 {
1050 intptr_t addri = (intptr_t)addr;
1051 ptrdiff_t disp = tcg_pcrel_diff(s, addr);
1052
1053 if ((addri & 1) == 0 && disp - 8 < 0x01fffffd && disp - 8 > -0x01fffffd) {
1054 tcg_out_b(s, cond, disp);
1055 return;
1056 }
1057 tcg_out_movi_pool(s, cond, TCG_REG_PC, addri);
1058 }
1059
1060 /* The call case is mostly used for helpers - so it's not unreasonable
1061 * for them to be beyond branch range */
1062 static void tcg_out_call(TCGContext *s, tcg_insn_unit *addr)
1063 {
1064 intptr_t addri = (intptr_t)addr;
1065 ptrdiff_t disp = tcg_pcrel_diff(s, addr);
1066
1067 if (disp - 8 < 0x02000000 && disp - 8 >= -0x02000000) {
1068 if (addri & 1) {
1069 /* Use BLX if the target is in Thumb mode */
1070 if (!use_armv5t_instructions) {
1071 tcg_abort();
1072 }
1073 tcg_out_blx_imm(s, disp);
1074 } else {
1075 tcg_out_bl(s, COND_AL, disp);
1076 }
1077 } else if (use_armv7_instructions) {
1078 tcg_out_movi32(s, COND_AL, TCG_REG_TMP, addri);
1079 tcg_out_blx(s, COND_AL, TCG_REG_TMP);
1080 } else {
1081 /* ??? Know that movi_pool emits exactly 2 insns. */
1082 tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R14, TCG_REG_PC, 4);
1083 tcg_out_movi_pool(s, COND_AL, TCG_REG_PC, addri);
1084 }
1085 }
1086
1087 static inline void tcg_out_goto_label(TCGContext *s, int cond, TCGLabel *l)
1088 {
1089 if (l->has_value) {
1090 tcg_out_goto(s, cond, l->u.value_ptr);
1091 } else {
1092 tcg_out_reloc(s, s->code_ptr, R_ARM_PC24, l, 0);
1093 tcg_out_b_noaddr(s, cond);
1094 }
1095 }
1096
1097 static inline void tcg_out_mb(TCGContext *s, TCGArg a0)
1098 {
1099 if (use_armv7_instructions) {
1100 tcg_out32(s, INSN_DMB_ISH);
1101 } else if (use_armv6_instructions) {
1102 tcg_out32(s, INSN_DMB_MCR);
1103 }
1104 }
1105
1106 static TCGCond tcg_out_cmp2(TCGContext *s, const TCGArg *args,
1107 const int *const_args)
1108 {
1109 TCGReg al = args[0];
1110 TCGReg ah = args[1];
1111 TCGArg bl = args[2];
1112 TCGArg bh = args[3];
1113 TCGCond cond = args[4];
1114 int const_bl = const_args[2];
1115 int const_bh = const_args[3];
1116
1117 switch (cond) {
1118 case TCG_COND_EQ:
1119 case TCG_COND_NE:
1120 case TCG_COND_LTU:
1121 case TCG_COND_LEU:
1122 case TCG_COND_GTU:
1123 case TCG_COND_GEU:
1124 /* We perform a conditional comparision. If the high half is
1125 equal, then overwrite the flags with the comparison of the
1126 low half. The resulting flags cover the whole. */
1127 tcg_out_dat_rI(s, COND_AL, ARITH_CMP, 0, ah, bh, const_bh);
1128 tcg_out_dat_rI(s, COND_EQ, ARITH_CMP, 0, al, bl, const_bl);
1129 return cond;
1130
1131 case TCG_COND_LT:
1132 case TCG_COND_GE:
1133 /* We perform a double-word subtraction and examine the result.
1134 We do not actually need the result of the subtract, so the
1135 low part "subtract" is a compare. For the high half we have
1136 no choice but to compute into a temporary. */
1137 tcg_out_dat_rI(s, COND_AL, ARITH_CMP, 0, al, bl, const_bl);
1138 tcg_out_dat_rI(s, COND_AL, ARITH_SBC | TO_CPSR,
1139 TCG_REG_TMP, ah, bh, const_bh);
1140 return cond;
1141
1142 case TCG_COND_LE:
1143 case TCG_COND_GT:
1144 /* Similar, but with swapped arguments, via reversed subtract. */
1145 tcg_out_dat_rI(s, COND_AL, ARITH_RSB | TO_CPSR,
1146 TCG_REG_TMP, al, bl, const_bl);
1147 tcg_out_dat_rI(s, COND_AL, ARITH_RSC | TO_CPSR,
1148 TCG_REG_TMP, ah, bh, const_bh);
1149 return tcg_swap_cond(cond);
1150
1151 default:
1152 g_assert_not_reached();
1153 }
1154 }
1155
1156 #ifdef CONFIG_SOFTMMU
1157 #include "tcg-ldst.inc.c"
1158
1159 /* helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr,
1160 * int mmu_idx, uintptr_t ra)
1161 */
1162 static void * const qemu_ld_helpers[16] = {
1163 [MO_UB] = helper_ret_ldub_mmu,
1164 [MO_SB] = helper_ret_ldsb_mmu,
1165
1166 [MO_LEUW] = helper_le_lduw_mmu,
1167 [MO_LEUL] = helper_le_ldul_mmu,
1168 [MO_LEQ] = helper_le_ldq_mmu,
1169 [MO_LESW] = helper_le_ldsw_mmu,
1170 [MO_LESL] = helper_le_ldul_mmu,
1171
1172 [MO_BEUW] = helper_be_lduw_mmu,
1173 [MO_BEUL] = helper_be_ldul_mmu,
1174 [MO_BEQ] = helper_be_ldq_mmu,
1175 [MO_BESW] = helper_be_ldsw_mmu,
1176 [MO_BESL] = helper_be_ldul_mmu,
1177 };
1178
1179 /* helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr,
1180 * uintxx_t val, int mmu_idx, uintptr_t ra)
1181 */
1182 static void * const qemu_st_helpers[16] = {
1183 [MO_UB] = helper_ret_stb_mmu,
1184 [MO_LEUW] = helper_le_stw_mmu,
1185 [MO_LEUL] = helper_le_stl_mmu,
1186 [MO_LEQ] = helper_le_stq_mmu,
1187 [MO_BEUW] = helper_be_stw_mmu,
1188 [MO_BEUL] = helper_be_stl_mmu,
1189 [MO_BEQ] = helper_be_stq_mmu,
1190 };
1191
1192 /* Helper routines for marshalling helper function arguments into
1193 * the correct registers and stack.
1194 * argreg is where we want to put this argument, arg is the argument itself.
1195 * Return value is the updated argreg ready for the next call.
1196 * Note that argreg 0..3 is real registers, 4+ on stack.
1197 *
1198 * We provide routines for arguments which are: immediate, 32 bit
1199 * value in register, 16 and 8 bit values in register (which must be zero
1200 * extended before use) and 64 bit value in a lo:hi register pair.
1201 */
1202 #define DEFINE_TCG_OUT_ARG(NAME, ARGTYPE, MOV_ARG, EXT_ARG) \
1203 static TCGReg NAME(TCGContext *s, TCGReg argreg, ARGTYPE arg) \
1204 { \
1205 if (argreg < 4) { \
1206 MOV_ARG(s, COND_AL, argreg, arg); \
1207 } else { \
1208 int ofs = (argreg - 4) * 4; \
1209 EXT_ARG; \
1210 tcg_debug_assert(ofs + 4 <= TCG_STATIC_CALL_ARGS_SIZE); \
1211 tcg_out_st32_12(s, COND_AL, arg, TCG_REG_CALL_STACK, ofs); \
1212 } \
1213 return argreg + 1; \
1214 }
1215
1216 DEFINE_TCG_OUT_ARG(tcg_out_arg_imm32, uint32_t, tcg_out_movi32,
1217 (tcg_out_movi32(s, COND_AL, TCG_REG_TMP, arg), arg = TCG_REG_TMP))
1218 DEFINE_TCG_OUT_ARG(tcg_out_arg_reg8, TCGReg, tcg_out_ext8u,
1219 (tcg_out_ext8u(s, COND_AL, TCG_REG_TMP, arg), arg = TCG_REG_TMP))
1220 DEFINE_TCG_OUT_ARG(tcg_out_arg_reg16, TCGReg, tcg_out_ext16u,
1221 (tcg_out_ext16u(s, COND_AL, TCG_REG_TMP, arg), arg = TCG_REG_TMP))
1222 DEFINE_TCG_OUT_ARG(tcg_out_arg_reg32, TCGReg, tcg_out_mov_reg, )
1223
1224 static TCGReg tcg_out_arg_reg64(TCGContext *s, TCGReg argreg,
1225 TCGReg arglo, TCGReg arghi)
1226 {
1227 /* 64 bit arguments must go in even/odd register pairs
1228 * and in 8-aligned stack slots.
1229 */
1230 if (argreg & 1) {
1231 argreg++;
1232 }
1233 if (use_armv6_instructions && argreg >= 4
1234 && (arglo & 1) == 0 && arghi == arglo + 1) {
1235 tcg_out_strd_8(s, COND_AL, arglo,
1236 TCG_REG_CALL_STACK, (argreg - 4) * 4);
1237 return argreg + 2;
1238 } else {
1239 argreg = tcg_out_arg_reg32(s, argreg, arglo);
1240 argreg = tcg_out_arg_reg32(s, argreg, arghi);
1241 return argreg;
1242 }
1243 }
1244
1245 #define TLB_SHIFT (CPU_TLB_ENTRY_BITS + CPU_TLB_BITS)
1246
1247 /* We're expecting to use an 8-bit immediate and to mask. */
1248 QEMU_BUILD_BUG_ON(CPU_TLB_BITS > 8);
1249
1250 /* Load and compare a TLB entry, leaving the flags set. Returns the register
1251 containing the addend of the tlb entry. Clobbers R0, R1, R2, TMP. */
1252
1253 static TCGReg tcg_out_tlb_read(TCGContext *s, TCGReg addrlo, TCGReg addrhi,
1254 TCGMemOp opc, int mem_index, bool is_load)
1255 {
1256 TCGReg base = TCG_AREG0;
1257 int cmp_off =
1258 (is_load
1259 ? offsetof(CPUArchState, tlb_table[mem_index][0].addr_read)
1260 : offsetof(CPUArchState, tlb_table[mem_index][0].addr_write));
1261 int add_off = offsetof(CPUArchState, tlb_table[mem_index][0].addend);
1262 int mask_off;
1263 unsigned s_bits = opc & MO_SIZE;
1264 unsigned a_bits = get_alignment_bits(opc);
1265
1266 /* V7 generates the following:
1267 * ubfx r0, addrlo, #TARGET_PAGE_BITS, #CPU_TLB_BITS
1268 * add r2, env, #high
1269 * add r2, r2, r0, lsl #CPU_TLB_ENTRY_BITS
1270 * ldr r0, [r2, #cmp]
1271 * ldr r2, [r2, #add]
1272 * movw tmp, #page_align_mask
1273 * bic tmp, addrlo, tmp
1274 * cmp r0, tmp
1275 *
1276 * Otherwise we generate:
1277 * shr tmp, addrlo, #TARGET_PAGE_BITS
1278 * add r2, env, #high
1279 * and r0, tmp, #(CPU_TLB_SIZE - 1)
1280 * add r2, r2, r0, lsl #CPU_TLB_ENTRY_BITS
1281 * ldr r0, [r2, #cmp]
1282 * ldr r2, [r2, #add]
1283 * tst addrlo, #s_mask
1284 * cmpeq r0, tmp, lsl #TARGET_PAGE_BITS
1285 */
1286 if (use_armv7_instructions) {
1287 tcg_out_extract(s, COND_AL, TCG_REG_R0, addrlo,
1288 TARGET_PAGE_BITS, CPU_TLB_BITS);
1289 } else {
1290 tcg_out_dat_reg(s, COND_AL, ARITH_MOV, TCG_REG_TMP,
1291 0, addrlo, SHIFT_IMM_LSR(TARGET_PAGE_BITS));
1292 }
1293
1294 /* Add portions of the offset until the memory access is in range.
1295 * If we plan on using ldrd, reduce to an 8-bit offset; otherwise
1296 * we can use a 12-bit offset. */
1297 if (use_armv6_instructions && TARGET_LONG_BITS == 64) {
1298 mask_off = 0xff;
1299 } else {
1300 mask_off = 0xfff;
1301 }
1302 while (cmp_off > mask_off) {
1303 int shift = ctz32(cmp_off & ~mask_off) & ~1;
1304 int rot = ((32 - shift) << 7) & 0xf00;
1305 int addend = cmp_off & (0xff << shift);
1306 tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R2, base,
1307 rot | ((cmp_off >> shift) & 0xff));
1308 base = TCG_REG_R2;
1309 add_off -= addend;
1310 cmp_off -= addend;
1311 }
1312
1313 if (!use_armv7_instructions) {
1314 tcg_out_dat_imm(s, COND_AL, ARITH_AND,
1315 TCG_REG_R0, TCG_REG_TMP, CPU_TLB_SIZE - 1);
1316 }
1317 tcg_out_dat_reg(s, COND_AL, ARITH_ADD, TCG_REG_R2, base,
1318 TCG_REG_R0, SHIFT_IMM_LSL(CPU_TLB_ENTRY_BITS));
1319
1320 /* Load the tlb comparator. Use ldrd if needed and available,
1321 but due to how the pointer needs setting up, ldm isn't useful.
1322 Base arm5 doesn't have ldrd, but armv5te does. */
1323 if (use_armv6_instructions && TARGET_LONG_BITS == 64) {
1324 tcg_out_ldrd_8(s, COND_AL, TCG_REG_R0, TCG_REG_R2, cmp_off);
1325 } else {
1326 tcg_out_ld32_12(s, COND_AL, TCG_REG_R0, TCG_REG_R2, cmp_off);
1327 if (TARGET_LONG_BITS == 64) {
1328 tcg_out_ld32_12(s, COND_AL, TCG_REG_R1, TCG_REG_R2, cmp_off + 4);
1329 }
1330 }
1331
1332 /* Load the tlb addend. */
1333 tcg_out_ld32_12(s, COND_AL, TCG_REG_R2, TCG_REG_R2, add_off);
1334
1335 /* Check alignment. We don't support inline unaligned acceses,
1336 but we can easily support overalignment checks. */
1337 if (a_bits < s_bits) {
1338 a_bits = s_bits;
1339 }
1340
1341 if (use_armv7_instructions) {
1342 tcg_target_ulong mask = ~(TARGET_PAGE_MASK | ((1 << a_bits) - 1));
1343 int rot = encode_imm(mask);
1344
1345 if (rot >= 0) {
1346 tcg_out_dat_imm(s, COND_AL, ARITH_BIC, TCG_REG_TMP, addrlo,
1347 rotl(mask, rot) | (rot << 7));
1348 } else {
1349 tcg_out_movi32(s, COND_AL, TCG_REG_TMP, mask);
1350 tcg_out_dat_reg(s, COND_AL, ARITH_BIC, TCG_REG_TMP,
1351 addrlo, TCG_REG_TMP, 0);
1352 }
1353 tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0, TCG_REG_R0, TCG_REG_TMP, 0);
1354 } else {
1355 if (a_bits) {
1356 tcg_out_dat_imm(s, COND_AL, ARITH_TST, 0, addrlo,
1357 (1 << a_bits) - 1);
1358 }
1359 tcg_out_dat_reg(s, (a_bits ? COND_EQ : COND_AL), ARITH_CMP,
1360 0, TCG_REG_R0, TCG_REG_TMP,
1361 SHIFT_IMM_LSL(TARGET_PAGE_BITS));
1362 }
1363
1364 if (TARGET_LONG_BITS == 64) {
1365 tcg_out_dat_reg(s, COND_EQ, ARITH_CMP, 0, TCG_REG_R1, addrhi, 0);
1366 }
1367
1368 return TCG_REG_R2;
1369 }
1370
1371 /* Record the context of a call to the out of line helper code for the slow
1372 path for a load or store, so that we can later generate the correct
1373 helper code. */
1374 static void add_qemu_ldst_label(TCGContext *s, bool is_ld, TCGMemOpIdx oi,
1375 TCGReg datalo, TCGReg datahi, TCGReg addrlo,
1376 TCGReg addrhi, tcg_insn_unit *raddr,
1377 tcg_insn_unit *label_ptr)
1378 {
1379 TCGLabelQemuLdst *label = new_ldst_label(s);
1380
1381 label->is_ld = is_ld;
1382 label->oi = oi;
1383 label->datalo_reg = datalo;
1384 label->datahi_reg = datahi;
1385 label->addrlo_reg = addrlo;
1386 label->addrhi_reg = addrhi;
1387 label->raddr = raddr;
1388 label->label_ptr[0] = label_ptr;
1389 }
1390
1391 static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
1392 {
1393 TCGReg argreg, datalo, datahi;
1394 TCGMemOpIdx oi = lb->oi;
1395 TCGMemOp opc = get_memop(oi);
1396 void *func;
1397
1398 reloc_pc24(lb->label_ptr[0], s->code_ptr);
1399
1400 argreg = tcg_out_arg_reg32(s, TCG_REG_R0, TCG_AREG0);
1401 if (TARGET_LONG_BITS == 64) {
1402 argreg = tcg_out_arg_reg64(s, argreg, lb->addrlo_reg, lb->addrhi_reg);
1403 } else {
1404 argreg = tcg_out_arg_reg32(s, argreg, lb->addrlo_reg);
1405 }
1406 argreg = tcg_out_arg_imm32(s, argreg, oi);
1407 argreg = tcg_out_arg_reg32(s, argreg, TCG_REG_R14);
1408
1409 /* For armv6 we can use the canonical unsigned helpers and minimize
1410 icache usage. For pre-armv6, use the signed helpers since we do
1411 not have a single insn sign-extend. */
1412 if (use_armv6_instructions) {
1413 func = qemu_ld_helpers[opc & (MO_BSWAP | MO_SIZE)];
1414 } else {
1415 func = qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)];
1416 if (opc & MO_SIGN) {
1417 opc = MO_UL;
1418 }
1419 }
1420 tcg_out_call(s, func);
1421
1422 datalo = lb->datalo_reg;
1423 datahi = lb->datahi_reg;
1424 switch (opc & MO_SSIZE) {
1425 case MO_SB:
1426 tcg_out_ext8s(s, COND_AL, datalo, TCG_REG_R0);
1427 break;
1428 case MO_SW:
1429 tcg_out_ext16s(s, COND_AL, datalo, TCG_REG_R0);
1430 break;
1431 default:
1432 tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_R0);
1433 break;
1434 case MO_Q:
1435 if (datalo != TCG_REG_R1) {
1436 tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_R0);
1437 tcg_out_mov_reg(s, COND_AL, datahi, TCG_REG_R1);
1438 } else if (datahi != TCG_REG_R0) {
1439 tcg_out_mov_reg(s, COND_AL, datahi, TCG_REG_R1);
1440 tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_R0);
1441 } else {
1442 tcg_out_mov_reg(s, COND_AL, TCG_REG_TMP, TCG_REG_R0);
1443 tcg_out_mov_reg(s, COND_AL, datahi, TCG_REG_R1);
1444 tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_TMP);
1445 }
1446 break;
1447 }
1448
1449 tcg_out_goto(s, COND_AL, lb->raddr);
1450 }
1451
1452 static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
1453 {
1454 TCGReg argreg, datalo, datahi;
1455 TCGMemOpIdx oi = lb->oi;
1456 TCGMemOp opc = get_memop(oi);
1457
1458 reloc_pc24(lb->label_ptr[0], s->code_ptr);
1459
1460 argreg = TCG_REG_R0;
1461 argreg = tcg_out_arg_reg32(s, argreg, TCG_AREG0);
1462 if (TARGET_LONG_BITS == 64) {
1463 argreg = tcg_out_arg_reg64(s, argreg, lb->addrlo_reg, lb->addrhi_reg);
1464 } else {
1465 argreg = tcg_out_arg_reg32(s, argreg, lb->addrlo_reg);
1466 }
1467
1468 datalo = lb->datalo_reg;
1469 datahi = lb->datahi_reg;
1470 switch (opc & MO_SIZE) {
1471 case MO_8:
1472 argreg = tcg_out_arg_reg8(s, argreg, datalo);
1473 break;
1474 case MO_16:
1475 argreg = tcg_out_arg_reg16(s, argreg, datalo);
1476 break;
1477 case MO_32:
1478 default:
1479 argreg = tcg_out_arg_reg32(s, argreg, datalo);
1480 break;
1481 case MO_64:
1482 argreg = tcg_out_arg_reg64(s, argreg, datalo, datahi);
1483 break;
1484 }
1485
1486 argreg = tcg_out_arg_imm32(s, argreg, oi);
1487 argreg = tcg_out_arg_reg32(s, argreg, TCG_REG_R14);
1488
1489 /* Tail-call to the helper, which will return to the fast path. */
1490 tcg_out_goto(s, COND_AL, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]);
1491 }
1492 #endif /* SOFTMMU */
1493
1494 static inline void tcg_out_qemu_ld_index(TCGContext *s, TCGMemOp opc,
1495 TCGReg datalo, TCGReg datahi,
1496 TCGReg addrlo, TCGReg addend)
1497 {
1498 TCGMemOp bswap = opc & MO_BSWAP;
1499
1500 switch (opc & MO_SSIZE) {
1501 case MO_UB:
1502 tcg_out_ld8_r(s, COND_AL, datalo, addrlo, addend);
1503 break;
1504 case MO_SB:
1505 tcg_out_ld8s_r(s, COND_AL, datalo, addrlo, addend);
1506 break;
1507 case MO_UW:
1508 tcg_out_ld16u_r(s, COND_AL, datalo, addrlo, addend);
1509 if (bswap) {
1510 tcg_out_bswap16(s, COND_AL, datalo, datalo);
1511 }
1512 break;
1513 case MO_SW:
1514 if (bswap) {
1515 tcg_out_ld16u_r(s, COND_AL, datalo, addrlo, addend);
1516 tcg_out_bswap16s(s, COND_AL, datalo, datalo);
1517 } else {
1518 tcg_out_ld16s_r(s, COND_AL, datalo, addrlo, addend);
1519 }
1520 break;
1521 case MO_UL:
1522 default:
1523 tcg_out_ld32_r(s, COND_AL, datalo, addrlo, addend);
1524 if (bswap) {
1525 tcg_out_bswap32(s, COND_AL, datalo, datalo);
1526 }
1527 break;
1528 case MO_Q:
1529 {
1530 TCGReg dl = (bswap ? datahi : datalo);
1531 TCGReg dh = (bswap ? datalo : datahi);
1532
1533 /* Avoid ldrd for user-only emulation, to handle unaligned. */
1534 if (USING_SOFTMMU && use_armv6_instructions
1535 && (dl & 1) == 0 && dh == dl + 1) {
1536 tcg_out_ldrd_r(s, COND_AL, dl, addrlo, addend);
1537 } else if (dl != addend) {
1538 tcg_out_ld32_rwb(s, COND_AL, dl, addend, addrlo);
1539 tcg_out_ld32_12(s, COND_AL, dh, addend, 4);
1540 } else {
1541 tcg_out_dat_reg(s, COND_AL, ARITH_ADD, TCG_REG_TMP,
1542 addend, addrlo, SHIFT_IMM_LSL(0));
1543 tcg_out_ld32_12(s, COND_AL, dl, TCG_REG_TMP, 0);
1544 tcg_out_ld32_12(s, COND_AL, dh, TCG_REG_TMP, 4);
1545 }
1546 if (bswap) {
1547 tcg_out_bswap32(s, COND_AL, dl, dl);
1548 tcg_out_bswap32(s, COND_AL, dh, dh);
1549 }
1550 }
1551 break;
1552 }
1553 }
1554
1555 static inline void tcg_out_qemu_ld_direct(TCGContext *s, TCGMemOp opc,
1556 TCGReg datalo, TCGReg datahi,
1557 TCGReg addrlo)
1558 {
1559 TCGMemOp bswap = opc & MO_BSWAP;
1560
1561 switch (opc & MO_SSIZE) {
1562 case MO_UB:
1563 tcg_out_ld8_12(s, COND_AL, datalo, addrlo, 0);
1564 break;
1565 case MO_SB:
1566 tcg_out_ld8s_8(s, COND_AL, datalo, addrlo, 0);
1567 break;
1568 case MO_UW:
1569 tcg_out_ld16u_8(s, COND_AL, datalo, addrlo, 0);
1570 if (bswap) {
1571 tcg_out_bswap16(s, COND_AL, datalo, datalo);
1572 }
1573 break;
1574 case MO_SW:
1575 if (bswap) {
1576 tcg_out_ld16u_8(s, COND_AL, datalo, addrlo, 0);
1577 tcg_out_bswap16s(s, COND_AL, datalo, datalo);
1578 } else {
1579 tcg_out_ld16s_8(s, COND_AL, datalo, addrlo, 0);
1580 }
1581 break;
1582 case MO_UL:
1583 default:
1584 tcg_out_ld32_12(s, COND_AL, datalo, addrlo, 0);
1585 if (bswap) {
1586 tcg_out_bswap32(s, COND_AL, datalo, datalo);
1587 }
1588 break;
1589 case MO_Q:
1590 {
1591 TCGReg dl = (bswap ? datahi : datalo);
1592 TCGReg dh = (bswap ? datalo : datahi);
1593
1594 /* Avoid ldrd for user-only emulation, to handle unaligned. */
1595 if (USING_SOFTMMU && use_armv6_instructions
1596 && (dl & 1) == 0 && dh == dl + 1) {
1597 tcg_out_ldrd_8(s, COND_AL, dl, addrlo, 0);
1598 } else if (dl == addrlo) {
1599 tcg_out_ld32_12(s, COND_AL, dh, addrlo, bswap ? 0 : 4);
1600 tcg_out_ld32_12(s, COND_AL, dl, addrlo, bswap ? 4 : 0);
1601 } else {
1602 tcg_out_ld32_12(s, COND_AL, dl, addrlo, bswap ? 4 : 0);
1603 tcg_out_ld32_12(s, COND_AL, dh, addrlo, bswap ? 0 : 4);
1604 }
1605 if (bswap) {
1606 tcg_out_bswap32(s, COND_AL, dl, dl);
1607 tcg_out_bswap32(s, COND_AL, dh, dh);
1608 }
1609 }
1610 break;
1611 }
1612 }
1613
1614 static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is64)
1615 {
1616 TCGReg addrlo, datalo, datahi, addrhi __attribute__((unused));
1617 TCGMemOpIdx oi;
1618 TCGMemOp opc;
1619 #ifdef CONFIG_SOFTMMU
1620 int mem_index;
1621 TCGReg addend;
1622 tcg_insn_unit *label_ptr;
1623 #endif
1624
1625 datalo = *args++;
1626 datahi = (is64 ? *args++ : 0);
1627 addrlo = *args++;
1628 addrhi = (TARGET_LONG_BITS == 64 ? *args++ : 0);
1629 oi = *args++;
1630 opc = get_memop(oi);
1631
1632 #ifdef CONFIG_SOFTMMU
1633 mem_index = get_mmuidx(oi);
1634 addend = tcg_out_tlb_read(s, addrlo, addrhi, opc, mem_index, 1);
1635
1636 /* This a conditional BL only to load a pointer within this opcode into LR
1637 for the slow path. We will not be using the value for a tail call. */
1638 label_ptr = s->code_ptr;
1639 tcg_out_bl_noaddr(s, COND_NE);
1640
1641 tcg_out_qemu_ld_index(s, opc, datalo, datahi, addrlo, addend);
1642
1643 add_qemu_ldst_label(s, true, oi, datalo, datahi, addrlo, addrhi,
1644 s->code_ptr, label_ptr);
1645 #else /* !CONFIG_SOFTMMU */
1646 if (guest_base) {
1647 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP, guest_base);
1648 tcg_out_qemu_ld_index(s, opc, datalo, datahi, addrlo, TCG_REG_TMP);
1649 } else {
1650 tcg_out_qemu_ld_direct(s, opc, datalo, datahi, addrlo);
1651 }
1652 #endif
1653 }
1654
1655 static inline void tcg_out_qemu_st_index(TCGContext *s, int cond, TCGMemOp opc,
1656 TCGReg datalo, TCGReg datahi,
1657 TCGReg addrlo, TCGReg addend)
1658 {
1659 TCGMemOp bswap = opc & MO_BSWAP;
1660
1661 switch (opc & MO_SIZE) {
1662 case MO_8:
1663 tcg_out_st8_r(s, cond, datalo, addrlo, addend);
1664 break;
1665 case MO_16:
1666 if (bswap) {
1667 tcg_out_bswap16st(s, cond, TCG_REG_R0, datalo);
1668 tcg_out_st16_r(s, cond, TCG_REG_R0, addrlo, addend);
1669 } else {
1670 tcg_out_st16_r(s, cond, datalo, addrlo, addend);
1671 }
1672 break;
1673 case MO_32:
1674 default:
1675 if (bswap) {
1676 tcg_out_bswap32(s, cond, TCG_REG_R0, datalo);
1677 tcg_out_st32_r(s, cond, TCG_REG_R0, addrlo, addend);
1678 } else {
1679 tcg_out_st32_r(s, cond, datalo, addrlo, addend);
1680 }
1681 break;
1682 case MO_64:
1683 /* Avoid strd for user-only emulation, to handle unaligned. */
1684 if (bswap) {
1685 tcg_out_bswap32(s, cond, TCG_REG_R0, datahi);
1686 tcg_out_st32_rwb(s, cond, TCG_REG_R0, addend, addrlo);
1687 tcg_out_bswap32(s, cond, TCG_REG_R0, datalo);
1688 tcg_out_st32_12(s, cond, TCG_REG_R0, addend, 4);
1689 } else if (USING_SOFTMMU && use_armv6_instructions
1690 && (datalo & 1) == 0 && datahi == datalo + 1) {
1691 tcg_out_strd_r(s, cond, datalo, addrlo, addend);
1692 } else {
1693 tcg_out_st32_rwb(s, cond, datalo, addend, addrlo);
1694 tcg_out_st32_12(s, cond, datahi, addend, 4);
1695 }
1696 break;
1697 }
1698 }
1699
1700 static inline void tcg_out_qemu_st_direct(TCGContext *s, TCGMemOp opc,
1701 TCGReg datalo, TCGReg datahi,
1702 TCGReg addrlo)
1703 {
1704 TCGMemOp bswap = opc & MO_BSWAP;
1705
1706 switch (opc & MO_SIZE) {
1707 case MO_8:
1708 tcg_out_st8_12(s, COND_AL, datalo, addrlo, 0);
1709 break;
1710 case MO_16:
1711 if (bswap) {
1712 tcg_out_bswap16st(s, COND_AL, TCG_REG_R0, datalo);
1713 tcg_out_st16_8(s, COND_AL, TCG_REG_R0, addrlo, 0);
1714 } else {
1715 tcg_out_st16_8(s, COND_AL, datalo, addrlo, 0);
1716 }
1717 break;
1718 case MO_32:
1719 default:
1720 if (bswap) {
1721 tcg_out_bswap32(s, COND_AL, TCG_REG_R0, datalo);
1722 tcg_out_st32_12(s, COND_AL, TCG_REG_R0, addrlo, 0);
1723 } else {
1724 tcg_out_st32_12(s, COND_AL, datalo, addrlo, 0);
1725 }
1726 break;
1727 case MO_64:
1728 /* Avoid strd for user-only emulation, to handle unaligned. */
1729 if (bswap) {
1730 tcg_out_bswap32(s, COND_AL, TCG_REG_R0, datahi);
1731 tcg_out_st32_12(s, COND_AL, TCG_REG_R0, addrlo, 0);
1732 tcg_out_bswap32(s, COND_AL, TCG_REG_R0, datalo);
1733 tcg_out_st32_12(s, COND_AL, TCG_REG_R0, addrlo, 4);
1734 } else if (USING_SOFTMMU && use_armv6_instructions
1735 && (datalo & 1) == 0 && datahi == datalo + 1) {
1736 tcg_out_strd_8(s, COND_AL, datalo, addrlo, 0);
1737 } else {
1738 tcg_out_st32_12(s, COND_AL, datalo, addrlo, 0);
1739 tcg_out_st32_12(s, COND_AL, datahi, addrlo, 4);
1740 }
1741 break;
1742 }
1743 }
1744
1745 static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64)
1746 {
1747 TCGReg addrlo, datalo, datahi, addrhi __attribute__((unused));
1748 TCGMemOpIdx oi;
1749 TCGMemOp opc;
1750 #ifdef CONFIG_SOFTMMU
1751 int mem_index;
1752 TCGReg addend;
1753 tcg_insn_unit *label_ptr;
1754 #endif
1755
1756 datalo = *args++;
1757 datahi = (is64 ? *args++ : 0);
1758 addrlo = *args++;
1759 addrhi = (TARGET_LONG_BITS == 64 ? *args++ : 0);
1760 oi = *args++;
1761 opc = get_memop(oi);
1762
1763 #ifdef CONFIG_SOFTMMU
1764 mem_index = get_mmuidx(oi);
1765 addend = tcg_out_tlb_read(s, addrlo, addrhi, opc, mem_index, 0);
1766
1767 tcg_out_qemu_st_index(s, COND_EQ, opc, datalo, datahi, addrlo, addend);
1768
1769 /* The conditional call must come last, as we're going to return here. */
1770 label_ptr = s->code_ptr;
1771 tcg_out_bl_noaddr(s, COND_NE);
1772
1773 add_qemu_ldst_label(s, false, oi, datalo, datahi, addrlo, addrhi,
1774 s->code_ptr, label_ptr);
1775 #else /* !CONFIG_SOFTMMU */
1776 if (guest_base) {
1777 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP, guest_base);
1778 tcg_out_qemu_st_index(s, COND_AL, opc, datalo,
1779 datahi, addrlo, TCG_REG_TMP);
1780 } else {
1781 tcg_out_qemu_st_direct(s, opc, datalo, datahi, addrlo);
1782 }
1783 #endif
1784 }
1785
1786 static tcg_insn_unit *tb_ret_addr;
1787
1788 static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
1789 const TCGArg *args, const int *const_args)
1790 {
1791 TCGArg a0, a1, a2, a3, a4, a5;
1792 int c;
1793
1794 switch (opc) {
1795 case INDEX_op_exit_tb:
1796 /* Reuse the zeroing that exists for goto_ptr. */
1797 a0 = args[0];
1798 if (a0 == 0) {
1799 tcg_out_goto(s, COND_AL, s->code_gen_epilogue);
1800 } else {
1801 tcg_out_movi32(s, COND_AL, TCG_REG_R0, args[0]);
1802 tcg_out_goto(s, COND_AL, tb_ret_addr);
1803 }
1804 break;
1805 case INDEX_op_goto_tb:
1806 {
1807 /* Indirect jump method */
1808 intptr_t ptr, dif, dil;
1809 TCGReg base = TCG_REG_PC;
1810
1811 tcg_debug_assert(s->tb_jmp_insn_offset == 0);
1812 ptr = (intptr_t)(s->tb_jmp_target_addr + args[0]);
1813 dif = ptr - ((intptr_t)s->code_ptr + 8);
1814 dil = sextract32(dif, 0, 12);
1815 if (dif != dil) {
1816 /* The TB is close, but outside the 12 bits addressable by
1817 the load. We can extend this to 20 bits with a sub of a
1818 shifted immediate from pc. In the vastly unlikely event
1819 the code requires more than 1MB, we'll use 2 insns and
1820 be no worse off. */
1821 base = TCG_REG_R0;
1822 tcg_out_movi32(s, COND_AL, base, ptr - dil);
1823 }
1824 tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, base, dil);
1825 set_jmp_reset_offset(s, args[0]);
1826 }
1827 break;
1828 case INDEX_op_goto_ptr:
1829 tcg_out_bx(s, COND_AL, args[0]);
1830 break;
1831 case INDEX_op_br:
1832 tcg_out_goto_label(s, COND_AL, arg_label(args[0]));
1833 break;
1834
1835 case INDEX_op_ld8u_i32:
1836 tcg_out_ld8u(s, COND_AL, args[0], args[1], args[2]);
1837 break;
1838 case INDEX_op_ld8s_i32:
1839 tcg_out_ld8s(s, COND_AL, args[0], args[1], args[2]);
1840 break;
1841 case INDEX_op_ld16u_i32:
1842 tcg_out_ld16u(s, COND_AL, args[0], args[1], args[2]);
1843 break;
1844 case INDEX_op_ld16s_i32:
1845 tcg_out_ld16s(s, COND_AL, args[0], args[1], args[2]);
1846 break;
1847 case INDEX_op_ld_i32:
1848 tcg_out_ld32u(s, COND_AL, args[0], args[1], args[2]);
1849 break;
1850 case INDEX_op_st8_i32:
1851 tcg_out_st8(s, COND_AL, args[0], args[1], args[2]);
1852 break;
1853 case INDEX_op_st16_i32:
1854 tcg_out_st16(s, COND_AL, args[0], args[1], args[2]);
1855 break;
1856 case INDEX_op_st_i32:
1857 tcg_out_st32(s, COND_AL, args[0], args[1], args[2]);
1858 break;
1859
1860 case INDEX_op_movcond_i32:
1861 /* Constraints mean that v2 is always in the same register as dest,
1862 * so we only need to do "if condition passed, move v1 to dest".
1863 */
1864 tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0,
1865 args[1], args[2], const_args[2]);
1866 tcg_out_dat_rIK(s, tcg_cond_to_arm_cond[args[5]], ARITH_MOV,
1867 ARITH_MVN, args[0], 0, args[3], const_args[3]);
1868 break;
1869 case INDEX_op_add_i32:
1870 tcg_out_dat_rIN(s, COND_AL, ARITH_ADD, ARITH_SUB,
1871 args[0], args[1], args[2], const_args[2]);
1872 break;
1873 case INDEX_op_sub_i32:
1874 if (const_args[1]) {
1875 if (const_args[2]) {
1876 tcg_out_movi32(s, COND_AL, args[0], args[1] - args[2]);
1877 } else {
1878 tcg_out_dat_rI(s, COND_AL, ARITH_RSB,
1879 args[0], args[2], args[1], 1);
1880 }
1881 } else {
1882 tcg_out_dat_rIN(s, COND_AL, ARITH_SUB, ARITH_ADD,
1883 args[0], args[1], args[2], const_args[2]);
1884 }
1885 break;
1886 case INDEX_op_and_i32:
1887 tcg_out_dat_rIK(s, COND_AL, ARITH_AND, ARITH_BIC,
1888 args[0], args[1], args[2], const_args[2]);
1889 break;
1890 case INDEX_op_andc_i32:
1891 tcg_out_dat_rIK(s, COND_AL, ARITH_BIC, ARITH_AND,
1892 args[0], args[1], args[2], const_args[2]);
1893 break;
1894 case INDEX_op_or_i32:
1895 c = ARITH_ORR;
1896 goto gen_arith;
1897 case INDEX_op_xor_i32:
1898 c = ARITH_EOR;
1899 /* Fall through. */
1900 gen_arith:
1901 tcg_out_dat_rI(s, COND_AL, c, args[0], args[1], args[2], const_args[2]);
1902 break;
1903 case INDEX_op_add2_i32:
1904 a0 = args[0], a1 = args[1], a2 = args[2];
1905 a3 = args[3], a4 = args[4], a5 = args[5];
1906 if (a0 == a3 || (a0 == a5 && !const_args[5])) {
1907 a0 = TCG_REG_TMP;
1908 }
1909 tcg_out_dat_rIN(s, COND_AL, ARITH_ADD | TO_CPSR, ARITH_SUB | TO_CPSR,
1910 a0, a2, a4, const_args[4]);
1911 tcg_out_dat_rIK(s, COND_AL, ARITH_ADC, ARITH_SBC,
1912 a1, a3, a5, const_args[5]);
1913 tcg_out_mov_reg(s, COND_AL, args[0], a0);
1914 break;
1915 case INDEX_op_sub2_i32:
1916 a0 = args[0], a1 = args[1], a2 = args[2];
1917 a3 = args[3], a4 = args[4], a5 = args[5];
1918 if ((a0 == a3 && !const_args[3]) || (a0 == a5 && !const_args[5])) {
1919 a0 = TCG_REG_TMP;
1920 }
1921 if (const_args[2]) {
1922 if (const_args[4]) {
1923 tcg_out_movi32(s, COND_AL, a0, a4);
1924 a4 = a0;
1925 }
1926 tcg_out_dat_rI(s, COND_AL, ARITH_RSB | TO_CPSR, a0, a4, a2, 1);
1927 } else {
1928 tcg_out_dat_rIN(s, COND_AL, ARITH_SUB | TO_CPSR,
1929 ARITH_ADD | TO_CPSR, a0, a2, a4, const_args[4]);
1930 }
1931 if (const_args[3]) {
1932 if (const_args[5]) {
1933 tcg_out_movi32(s, COND_AL, a1, a5);
1934 a5 = a1;
1935 }
1936 tcg_out_dat_rI(s, COND_AL, ARITH_RSC, a1, a5, a3, 1);
1937 } else {
1938 tcg_out_dat_rIK(s, COND_AL, ARITH_SBC, ARITH_ADC,
1939 a1, a3, a5, const_args[5]);
1940 }
1941 tcg_out_mov_reg(s, COND_AL, args[0], a0);
1942 break;
1943 case INDEX_op_neg_i32:
1944 tcg_out_dat_imm(s, COND_AL, ARITH_RSB, args[0], args[1], 0);
1945 break;
1946 case INDEX_op_not_i32:
1947 tcg_out_dat_reg(s, COND_AL,
1948 ARITH_MVN, args[0], 0, args[1], SHIFT_IMM_LSL(0));
1949 break;
1950 case INDEX_op_mul_i32:
1951 tcg_out_mul32(s, COND_AL, args[0], args[1], args[2]);
1952 break;
1953 case INDEX_op_mulu2_i32:
1954 tcg_out_umull32(s, COND_AL, args[0], args[1], args[2], args[3]);
1955 break;
1956 case INDEX_op_muls2_i32:
1957 tcg_out_smull32(s, COND_AL, args[0], args[1], args[2], args[3]);
1958 break;
1959 /* XXX: Perhaps args[2] & 0x1f is wrong */
1960 case INDEX_op_shl_i32:
1961 c = const_args[2] ?
1962 SHIFT_IMM_LSL(args[2] & 0x1f) : SHIFT_REG_LSL(args[2]);
1963 goto gen_shift32;
1964 case INDEX_op_shr_i32:
1965 c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_LSR(args[2] & 0x1f) :
1966 SHIFT_IMM_LSL(0) : SHIFT_REG_LSR(args[2]);
1967 goto gen_shift32;
1968 case INDEX_op_sar_i32:
1969 c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_ASR(args[2] & 0x1f) :
1970 SHIFT_IMM_LSL(0) : SHIFT_REG_ASR(args[2]);
1971 goto gen_shift32;
1972 case INDEX_op_rotr_i32:
1973 c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_ROR(args[2] & 0x1f) :
1974 SHIFT_IMM_LSL(0) : SHIFT_REG_ROR(args[2]);
1975 /* Fall through. */
1976 gen_shift32:
1977 tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], c);
1978 break;
1979
1980 case INDEX_op_rotl_i32:
1981 if (const_args[2]) {
1982 tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1],
1983 ((0x20 - args[2]) & 0x1f) ?
1984 SHIFT_IMM_ROR((0x20 - args[2]) & 0x1f) :
1985 SHIFT_IMM_LSL(0));
1986 } else {
1987 tcg_out_dat_imm(s, COND_AL, ARITH_RSB, TCG_REG_TMP, args[2], 0x20);
1988 tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1],
1989 SHIFT_REG_ROR(TCG_REG_TMP));
1990 }
1991 break;
1992
1993 case INDEX_op_ctz_i32:
1994 tcg_out_dat_reg(s, COND_AL, INSN_RBIT, TCG_REG_TMP, 0, args[1], 0);
1995 a1 = TCG_REG_TMP;
1996 goto do_clz;
1997
1998 case INDEX_op_clz_i32:
1999 a1 = args[1];
2000 do_clz:
2001 a0 = args[0];
2002 a2 = args[2];
2003 c = const_args[2];
2004 if (c && a2 == 32) {
2005 tcg_out_dat_reg(s, COND_AL, INSN_CLZ, a0, 0, a1, 0);
2006 break;
2007 }
2008 tcg_out_dat_imm(s, COND_AL, ARITH_CMP, 0, a1, 0);
2009 tcg_out_dat_reg(s, COND_NE, INSN_CLZ, a0, 0, a1, 0);
2010 if (c || a0 != a2) {
2011 tcg_out_dat_rIK(s, COND_EQ, ARITH_MOV, ARITH_MVN, a0, 0, a2, c);
2012 }
2013 break;
2014
2015 case INDEX_op_brcond_i32:
2016 tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0,
2017 args[0], args[1], const_args[1]);
2018 tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[2]],
2019 arg_label(args[3]));
2020 break;
2021 case INDEX_op_setcond_i32:
2022 tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0,
2023 args[1], args[2], const_args[2]);
2024 tcg_out_dat_imm(s, tcg_cond_to_arm_cond[args[3]],
2025 ARITH_MOV, args[0], 0, 1);
2026 tcg_out_dat_imm(s, tcg_cond_to_arm_cond[tcg_invert_cond(args[3])],
2027 ARITH_MOV, args[0], 0, 0);
2028 break;
2029
2030 case INDEX_op_brcond2_i32:
2031 c = tcg_out_cmp2(s, args, const_args);
2032 tcg_out_goto_label(s, tcg_cond_to_arm_cond[c], arg_label(args[5]));
2033 break;
2034 case INDEX_op_setcond2_i32:
2035 c = tcg_out_cmp2(s, args + 1, const_args + 1);
2036 tcg_out_dat_imm(s, tcg_cond_to_arm_cond[c], ARITH_MOV, args[0], 0, 1);
2037 tcg_out_dat_imm(s, tcg_cond_to_arm_cond[tcg_invert_cond(c)],
2038 ARITH_MOV, args[0], 0, 0);
2039 break;
2040
2041 case INDEX_op_qemu_ld_i32:
2042 tcg_out_qemu_ld(s, args, 0);
2043 break;
2044 case INDEX_op_qemu_ld_i64:
2045 tcg_out_qemu_ld(s, args, 1);
2046 break;
2047 case INDEX_op_qemu_st_i32:
2048 tcg_out_qemu_st(s, args, 0);
2049 break;
2050 case INDEX_op_qemu_st_i64:
2051 tcg_out_qemu_st(s, args, 1);
2052 break;
2053
2054 case INDEX_op_bswap16_i32:
2055 tcg_out_bswap16(s, COND_AL, args[0], args[1]);
2056 break;
2057 case INDEX_op_bswap32_i32:
2058 tcg_out_bswap32(s, COND_AL, args[0], args[1]);
2059 break;
2060
2061 case INDEX_op_ext8s_i32:
2062 tcg_out_ext8s(s, COND_AL, args[0], args[1]);
2063 break;
2064 case INDEX_op_ext16s_i32:
2065 tcg_out_ext16s(s, COND_AL, args[0], args[1]);
2066 break;
2067 case INDEX_op_ext16u_i32:
2068 tcg_out_ext16u(s, COND_AL, args[0], args[1]);
2069 break;
2070
2071 case INDEX_op_deposit_i32:
2072 tcg_out_deposit(s, COND_AL, args[0], args[2],
2073 args[3], args[4], const_args[2]);
2074 break;
2075 case INDEX_op_extract_i32:
2076 tcg_out_extract(s, COND_AL, args[0], args[1], args[2], args[3]);
2077 break;
2078 case INDEX_op_sextract_i32:
2079 tcg_out_sextract(s, COND_AL, args[0], args[1], args[2], args[3]);
2080 break;
2081
2082 case INDEX_op_div_i32:
2083 tcg_out_sdiv(s, COND_AL, args[0], args[1], args[2]);
2084 break;
2085 case INDEX_op_divu_i32:
2086 tcg_out_udiv(s, COND_AL, args[0], args[1], args[2]);
2087 break;
2088
2089 case INDEX_op_mb:
2090 tcg_out_mb(s, args[0]);
2091 break;
2092
2093 case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */
2094 case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */
2095 case INDEX_op_call: /* Always emitted via tcg_out_call. */
2096 default:
2097 tcg_abort();
2098 }
2099 }
2100
2101 static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
2102 {
2103 static const TCGTargetOpDef r = { .args_ct_str = { "r" } };
2104 static const TCGTargetOpDef r_r = { .args_ct_str = { "r", "r" } };
2105 static const TCGTargetOpDef s_s = { .args_ct_str = { "s", "s" } };
2106 static const TCGTargetOpDef r_l = { .args_ct_str = { "r", "l" } };
2107 static const TCGTargetOpDef r_r_r = { .args_ct_str = { "r", "r", "r" } };
2108 static const TCGTargetOpDef r_r_l = { .args_ct_str = { "r", "r", "l" } };
2109 static const TCGTargetOpDef r_l_l = { .args_ct_str = { "r", "l", "l" } };
2110 static const TCGTargetOpDef s_s_s = { .args_ct_str = { "s", "s", "s" } };
2111 static const TCGTargetOpDef r_r_ri = { .args_ct_str = { "r", "r", "ri" } };
2112 static const TCGTargetOpDef r_r_rI = { .args_ct_str = { "r", "r", "rI" } };
2113 static const TCGTargetOpDef r_r_rIN
2114 = { .args_ct_str = { "r", "r", "rIN" } };
2115 static const TCGTargetOpDef r_r_rIK
2116 = { .args_ct_str = { "r", "r", "rIK" } };
2117 static const TCGTargetOpDef r_r_r_r
2118 = { .args_ct_str = { "r", "r", "r", "r" } };
2119 static const TCGTargetOpDef r_r_l_l
2120 = { .args_ct_str = { "r", "r", "l", "l" } };
2121 static const TCGTargetOpDef s_s_s_s
2122 = { .args_ct_str = { "s", "s", "s", "s" } };
2123 static const TCGTargetOpDef br
2124 = { .args_ct_str = { "r", "rIN" } };
2125 static const TCGTargetOpDef dep
2126 = { .args_ct_str = { "r", "0", "rZ" } };
2127 static const TCGTargetOpDef movc
2128 = { .args_ct_str = { "r", "r", "rIN", "rIK", "0" } };
2129 static const TCGTargetOpDef add2
2130 = { .args_ct_str = { "r", "r", "r", "r", "rIN", "rIK" } };
2131 static const TCGTargetOpDef sub2
2132 = { .args_ct_str = { "r", "r", "rI", "rI", "rIN", "rIK" } };
2133 static const TCGTargetOpDef br2
2134 = { .args_ct_str = { "r", "r", "rI", "rI" } };
2135 static const TCGTargetOpDef setc2
2136 = { .args_ct_str = { "r", "r", "r", "rI", "rI" } };
2137
2138 switch (op) {
2139 case INDEX_op_goto_ptr:
2140 return &r;
2141
2142 case INDEX_op_ld8u_i32:
2143 case INDEX_op_ld8s_i32:
2144 case INDEX_op_ld16u_i32:
2145 case INDEX_op_ld16s_i32:
2146 case INDEX_op_ld_i32:
2147 case INDEX_op_st8_i32:
2148 case INDEX_op_st16_i32:
2149 case INDEX_op_st_i32:
2150 case INDEX_op_neg_i32:
2151 case INDEX_op_not_i32:
2152 case INDEX_op_bswap16_i32:
2153 case INDEX_op_bswap32_i32:
2154 case INDEX_op_ext8s_i32:
2155 case INDEX_op_ext16s_i32:
2156 case INDEX_op_ext16u_i32:
2157 case INDEX_op_extract_i32:
2158 case INDEX_op_sextract_i32:
2159 return &r_r;
2160
2161 case INDEX_op_add_i32:
2162 case INDEX_op_sub_i32:
2163 case INDEX_op_setcond_i32:
2164 return &r_r_rIN;
2165 case INDEX_op_and_i32:
2166 case INDEX_op_andc_i32:
2167 case INDEX_op_clz_i32:
2168 case INDEX_op_ctz_i32:
2169 return &r_r_rIK;
2170 case INDEX_op_mul_i32:
2171 case INDEX_op_div_i32:
2172 case INDEX_op_divu_i32:
2173 return &r_r_r;
2174 case INDEX_op_mulu2_i32:
2175 case INDEX_op_muls2_i32:
2176 return &r_r_r_r;
2177 case INDEX_op_or_i32:
2178 case INDEX_op_xor_i32:
2179 return &r_r_rI;
2180 case INDEX_op_shl_i32:
2181 case INDEX_op_shr_i32:
2182 case INDEX_op_sar_i32:
2183 case INDEX_op_rotl_i32:
2184 case INDEX_op_rotr_i32:
2185 return &r_r_ri;
2186
2187 case INDEX_op_brcond_i32:
2188 return &br;
2189 case INDEX_op_deposit_i32:
2190 return &dep;
2191 case INDEX_op_movcond_i32:
2192 return &movc;
2193 case INDEX_op_add2_i32:
2194 return &add2;
2195 case INDEX_op_sub2_i32:
2196 return &sub2;
2197 case INDEX_op_brcond2_i32:
2198 return &br2;
2199 case INDEX_op_setcond2_i32:
2200 return &setc2;
2201
2202 case INDEX_op_qemu_ld_i32:
2203 return TARGET_LONG_BITS == 32 ? &r_l : &r_l_l;
2204 case INDEX_op_qemu_ld_i64:
2205 return TARGET_LONG_BITS == 32 ? &r_r_l : &r_r_l_l;
2206 case INDEX_op_qemu_st_i32:
2207 return TARGET_LONG_BITS == 32 ? &s_s : &s_s_s;
2208 case INDEX_op_qemu_st_i64:
2209 return TARGET_LONG_BITS == 32 ? &s_s_s : &s_s_s_s;
2210
2211 default:
2212 return NULL;
2213 }
2214 }
2215
2216 static void tcg_target_init(TCGContext *s)
2217 {
2218 /* Only probe for the platform and capabilities if we havn't already
2219 determined maximum values at compile time. */
2220 #ifndef use_idiv_instructions
2221 {
2222 unsigned long hwcap = qemu_getauxval(AT_HWCAP);
2223 use_idiv_instructions = (hwcap & HWCAP_ARM_IDIVA) != 0;
2224 }
2225 #endif
2226 if (__ARM_ARCH < 7) {
2227 const char *pl = (const char *)qemu_getauxval(AT_PLATFORM);
2228 if (pl != NULL && pl[0] == 'v' && pl[1] >= '4' && pl[1] <= '9') {
2229 arm_arch = pl[1] - '0';
2230 }
2231 }
2232
2233 tcg_target_available_regs[TCG_TYPE_I32] = 0xffff;
2234
2235 tcg_target_call_clobber_regs = 0;
2236 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R0);
2237 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R1);
2238 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R2);
2239 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R3);
2240 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R12);
2241 tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R14);
2242
2243 s->reserved_regs = 0;
2244 tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
2245 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP);
2246 tcg_regset_set_reg(s->reserved_regs, TCG_REG_PC);
2247 }
2248
2249 static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg,
2250 TCGReg arg1, intptr_t arg2)
2251 {
2252 tcg_out_ld32u(s, COND_AL, arg, arg1, arg2);
2253 }
2254
2255 static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg,
2256 TCGReg arg1, intptr_t arg2)
2257 {
2258 tcg_out_st32(s, COND_AL, arg, arg1, arg2);
2259 }
2260
2261 static inline bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val,
2262 TCGReg base, intptr_t ofs)
2263 {
2264 return false;
2265 }
2266
2267 static inline void tcg_out_mov(TCGContext *s, TCGType type,
2268 TCGReg ret, TCGReg arg)
2269 {
2270 tcg_out_dat_reg(s, COND_AL, ARITH_MOV, ret, 0, arg, SHIFT_IMM_LSL(0));
2271 }
2272
2273 static inline void tcg_out_movi(TCGContext *s, TCGType type,
2274 TCGReg ret, tcg_target_long arg)
2275 {
2276 tcg_out_movi32(s, COND_AL, ret, arg);
2277 }
2278
2279 static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
2280 {
2281 int i;
2282 for (i = 0; i < count; ++i) {
2283 p[i] = INSN_NOP;
2284 }
2285 }
2286
2287 /* Compute frame size via macros, to share between tcg_target_qemu_prologue
2288 and tcg_register_jit. */
2289
2290 #define PUSH_SIZE ((11 - 4 + 1 + 1) * sizeof(tcg_target_long))
2291
2292 #define FRAME_SIZE \
2293 ((PUSH_SIZE \
2294 + TCG_STATIC_CALL_ARGS_SIZE \
2295 + CPU_TEMP_BUF_NLONGS * sizeof(long) \
2296 + TCG_TARGET_STACK_ALIGN - 1) \
2297 & -TCG_TARGET_STACK_ALIGN)
2298
2299 static void tcg_target_qemu_prologue(TCGContext *s)
2300 {
2301 int stack_addend;
2302
2303 /* Calling convention requires us to save r4-r11 and lr. */
2304 /* stmdb sp!, { r4 - r11, lr } */
2305 tcg_out32(s, (COND_AL << 28) | 0x092d4ff0);
2306
2307 /* Reserve callee argument and tcg temp space. */
2308 stack_addend = FRAME_SIZE - PUSH_SIZE;
2309
2310 tcg_out_dat_rI(s, COND_AL, ARITH_SUB, TCG_REG_CALL_STACK,
2311 TCG_REG_CALL_STACK, stack_addend, 1);
2312 tcg_set_frame(s, TCG_REG_CALL_STACK, TCG_STATIC_CALL_ARGS_SIZE,
2313 CPU_TEMP_BUF_NLONGS * sizeof(long));
2314
2315 tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
2316
2317 tcg_out_bx(s, COND_AL, tcg_target_call_iarg_regs[1]);
2318
2319 /*
2320 * Return path for goto_ptr. Set return value to 0, a-la exit_tb,
2321 * and fall through to the rest of the epilogue.
2322 */
2323 s->code_gen_epilogue = s->code_ptr;
2324 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, 0);
2325
2326 /* TB epilogue */
2327 tb_ret_addr = s->code_ptr;
2328 tcg_out_dat_rI(s, COND_AL, ARITH_ADD, TCG_REG_CALL_STACK,
2329 TCG_REG_CALL_STACK, stack_addend, 1);
2330
2331 /* ldmia sp!, { r4 - r11, pc } */
2332 tcg_out32(s, (COND_AL << 28) | 0x08bd8ff0);
2333 }
2334
2335 typedef struct {
2336 DebugFrameHeader h;
2337 uint8_t fde_def_cfa[4];
2338 uint8_t fde_reg_ofs[18];
2339 } DebugFrame;
2340
2341 #define ELF_HOST_MACHINE EM_ARM
2342
2343 /* We're expecting a 2 byte uleb128 encoded value. */
2344 QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14));
2345
2346 static const DebugFrame debug_frame = {
2347 .h.cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */
2348 .h.cie.id = -1,
2349 .h.cie.version = 1,
2350 .h.cie.code_align = 1,
2351 .h.cie.data_align = 0x7c, /* sleb128 -4 */
2352 .h.cie.return_column = 14,
2353
2354 /* Total FDE size does not include the "len" member. */
2355 .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset),
2356
2357 .fde_def_cfa = {
2358 12, 13, /* DW_CFA_def_cfa sp, ... */
2359 (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */
2360 (FRAME_SIZE >> 7)
2361 },
2362 .fde_reg_ofs = {
2363 /* The following must match the stmdb in the prologue. */
2364 0x8e, 1, /* DW_CFA_offset, lr, -4 */
2365 0x8b, 2, /* DW_CFA_offset, r11, -8 */
2366 0x8a, 3, /* DW_CFA_offset, r10, -12 */
2367 0x89, 4, /* DW_CFA_offset, r9, -16 */
2368 0x88, 5, /* DW_CFA_offset, r8, -20 */
2369 0x87, 6, /* DW_CFA_offset, r7, -24 */
2370 0x86, 7, /* DW_CFA_offset, r6, -28 */
2371 0x85, 8, /* DW_CFA_offset, r5, -32 */
2372 0x84, 9, /* DW_CFA_offset, r4, -36 */
2373 }
2374 };
2375
2376 void tcg_register_jit(void *buf, size_t buf_size)
2377 {
2378 tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));
2379 }
AR7 emulation for QEMU