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qcow2: Rename global functions
[qemu.git] / tcg / arm / tcg-target.c
blob8139da10c2ff83ca9214608efff6fb38d8510cee
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 #ifndef NDEBUG
26 static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
27 "%r0",
28 "%r1",
29 "%r2",
30 "%r3",
31 "%r4",
32 "%r5",
33 "%r6",
34 "%r7",
35 "%r8",
36 "%r9",
37 "%r10",
38 "%r11",
39 "%r12",
40 "%r13",
41 "%r14",
42 };
43 #endif
44
45 static const int tcg_target_reg_alloc_order[] = {
46 TCG_REG_R0,
47 TCG_REG_R1,
48 TCG_REG_R2,
49 TCG_REG_R3,
50 TCG_REG_R4,
51 TCG_REG_R5,
52 TCG_REG_R6,
53 TCG_REG_R7,
54 TCG_REG_R8,
55 TCG_REG_R9,
56 TCG_REG_R10,
57 TCG_REG_R11,
58 TCG_REG_R12,
59 TCG_REG_R13,
60 TCG_REG_R14,
61 };
62
63 static const int tcg_target_call_iarg_regs[4] = {
64 TCG_REG_R0, TCG_REG_R1, TCG_REG_R2, TCG_REG_R3
65 };
66 static const int tcg_target_call_oarg_regs[2] = {
67 TCG_REG_R0, TCG_REG_R1
68 };
69
70 static void patch_reloc(uint8_t *code_ptr, int type,
71 tcg_target_long value, tcg_target_long addend)
72 {
73 switch (type) {
74 case R_ARM_ABS32:
75 *(uint32_t *) code_ptr = value;
76 break;
77
78 case R_ARM_CALL:
79 case R_ARM_JUMP24:
80 default:
81 tcg_abort();
82
83 case R_ARM_PC24:
84 *(uint32_t *) code_ptr = ((*(uint32_t *) code_ptr) & 0xff000000) |
85 (((value - ((tcg_target_long) code_ptr + 8)) >> 2) & 0xffffff);
86 break;
87 }
88 }
89
90 /* maximum number of register used for input function arguments */
91 static inline int tcg_target_get_call_iarg_regs_count(int flags)
92 {
93 return 4;
94 }
95
96 /* parse target specific constraints */
97 static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
98 {
99 const char *ct_str;
100
101 ct_str = *pct_str;
102 switch (ct_str[0]) {
103 case 'r':
104 #ifndef CONFIG_SOFTMMU
105 case 'd':
106 case 'D':
107 case 'x':
108 case 'X':
109 #endif
110 ct->ct |= TCG_CT_REG;
111 tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
112 break;
113
114 #ifdef CONFIG_SOFTMMU
115 /* qemu_ld/st inputs (unless 'X', 'd' or 'D') */
116 case 'x':
117 ct->ct |= TCG_CT_REG;
118 tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
119 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
120 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
121 break;
122
123 /* qemu_ld64 data_reg */
124 case 'd':
125 ct->ct |= TCG_CT_REG;
126 tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
127 /* r1 is still needed to load data_reg2, so don't use it. */
128 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
129 break;
130
131 /* qemu_ld/st64 data_reg2 */
132 case 'D':
133 ct->ct |= TCG_CT_REG;
134 tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
135 /* r0, r1 and optionally r2 will be overwritten by the address
136 * and the low word of data, so don't use these. */
137 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
138 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
139 # if TARGET_LONG_BITS == 64
140 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2);
141 # endif
142 break;
143
144 # if TARGET_LONG_BITS == 64
145 /* qemu_ld/st addr_reg2 */
146 case 'X':
147 ct->ct |= TCG_CT_REG;
148 tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
149 /* r0 will be overwritten by the low word of base, so don't use it. */
150 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
151 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
152 break;
153 # endif
154 #endif
155
156 case '1':
157 ct->ct |= TCG_CT_REG;
158 tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
159 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
160 break;
161
162 case '2':
163 ct->ct |= TCG_CT_REG;
164 tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1);
165 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0);
166 tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1);
167 break;
168
169 default:
170 return -1;
171 }
172 ct_str++;
173 *pct_str = ct_str;
174
175 return 0;
176 }
177
178 /* Test if a constant matches the constraint.
179 * TODO: define constraints for:
180 *
181 * ldr/str offset: between -0xfff and 0xfff
182 * ldrh/strh offset: between -0xff and 0xff
183 * mov operand2: values represented with x << (2 * y), x < 0x100
184 * add, sub, eor...: ditto
185 */
186 static inline int tcg_target_const_match(tcg_target_long val,
187 const TCGArgConstraint *arg_ct)
188 {
189 int ct;
190 ct = arg_ct->ct;
191 if (ct & TCG_CT_CONST)
192 return 1;
193 else
194 return 0;
195 }
196
197 enum arm_data_opc_e {
198 ARITH_AND = 0x0,
199 ARITH_EOR = 0x1,
200 ARITH_SUB = 0x2,
201 ARITH_RSB = 0x3,
202 ARITH_ADD = 0x4,
203 ARITH_ADC = 0x5,
204 ARITH_SBC = 0x6,
205 ARITH_RSC = 0x7,
206 ARITH_TST = 0x8,
207 ARITH_CMP = 0xa,
208 ARITH_CMN = 0xb,
209 ARITH_ORR = 0xc,
210 ARITH_MOV = 0xd,
211 ARITH_BIC = 0xe,
212 ARITH_MVN = 0xf,
213 };
214
215 #define TO_CPSR(opc) \
216 ((opc == ARITH_CMP || opc == ARITH_CMN || opc == ARITH_TST) << 20)
217
218 #define SHIFT_IMM_LSL(im) (((im) << 7) | 0x00)
219 #define SHIFT_IMM_LSR(im) (((im) << 7) | 0x20)
220 #define SHIFT_IMM_ASR(im) (((im) << 7) | 0x40)
221 #define SHIFT_IMM_ROR(im) (((im) << 7) | 0x60)
222 #define SHIFT_REG_LSL(rs) (((rs) << 8) | 0x10)
223 #define SHIFT_REG_LSR(rs) (((rs) << 8) | 0x30)
224 #define SHIFT_REG_ASR(rs) (((rs) << 8) | 0x50)
225 #define SHIFT_REG_ROR(rs) (((rs) << 8) | 0x70)
226
227 enum arm_cond_code_e {
228 COND_EQ = 0x0,
229 COND_NE = 0x1,
230 COND_CS = 0x2, /* Unsigned greater or equal */
231 COND_CC = 0x3, /* Unsigned less than */
232 COND_MI = 0x4, /* Negative */
233 COND_PL = 0x5, /* Zero or greater */
234 COND_VS = 0x6, /* Overflow */
235 COND_VC = 0x7, /* No overflow */
236 COND_HI = 0x8, /* Unsigned greater than */
237 COND_LS = 0x9, /* Unsigned less or equal */
238 COND_GE = 0xa,
239 COND_LT = 0xb,
240 COND_GT = 0xc,
241 COND_LE = 0xd,
242 COND_AL = 0xe,
243 };
244
245 static const uint8_t tcg_cond_to_arm_cond[10] = {
246 [TCG_COND_EQ] = COND_EQ,
247 [TCG_COND_NE] = COND_NE,
248 [TCG_COND_LT] = COND_LT,
249 [TCG_COND_GE] = COND_GE,
250 [TCG_COND_LE] = COND_LE,
251 [TCG_COND_GT] = COND_GT,
252 /* unsigned */
253 [TCG_COND_LTU] = COND_CC,
254 [TCG_COND_GEU] = COND_CS,
255 [TCG_COND_LEU] = COND_LS,
256 [TCG_COND_GTU] = COND_HI,
257 };
258
259 static inline void tcg_out_bx(TCGContext *s, int cond, int rn)
260 {
261 tcg_out32(s, (cond << 28) | 0x012fff10 | rn);
262 }
263
264 static inline void tcg_out_b(TCGContext *s, int cond, int32_t offset)
265 {
266 tcg_out32(s, (cond << 28) | 0x0a000000 |
267 (((offset - 8) >> 2) & 0x00ffffff));
268 }
269
270 static inline void tcg_out_b_noaddr(TCGContext *s, int cond)
271 {
272 #ifdef WORDS_BIGENDIAN
273 tcg_out8(s, (cond << 4) | 0x0a);
274 s->code_ptr += 3;
275 #else
276 s->code_ptr += 3;
277 tcg_out8(s, (cond << 4) | 0x0a);
278 #endif
279 }
280
281 static inline void tcg_out_bl(TCGContext *s, int cond, int32_t offset)
282 {
283 tcg_out32(s, (cond << 28) | 0x0b000000 |
284 (((offset - 8) >> 2) & 0x00ffffff));
285 }
286
287 static inline void tcg_out_dat_reg(TCGContext *s,
288 int cond, int opc, int rd, int rn, int rm, int shift)
289 {
290 tcg_out32(s, (cond << 28) | (0 << 25) | (opc << 21) | TO_CPSR(opc) |
291 (rn << 16) | (rd << 12) | shift | rm);
292 }
293
294 static inline void tcg_out_dat_reg2(TCGContext *s,
295 int cond, int opc0, int opc1, int rd0, int rd1,
296 int rn0, int rn1, int rm0, int rm1, int shift)
297 {
298 if (rd0 == rn1 || rd0 == rm1) {
299 tcg_out32(s, (cond << 28) | (0 << 25) | (opc0 << 21) | (1 << 20) |
300 (rn0 << 16) | (8 << 12) | shift | rm0);
301 tcg_out32(s, (cond << 28) | (0 << 25) | (opc1 << 21) |
302 (rn1 << 16) | (rd1 << 12) | shift | rm1);
303 tcg_out_dat_reg(s, cond, ARITH_MOV,
304 rd0, 0, TCG_REG_R8, SHIFT_IMM_LSL(0));
305 } else {
306 tcg_out32(s, (cond << 28) | (0 << 25) | (opc0 << 21) | (1 << 20) |
307 (rn0 << 16) | (rd0 << 12) | shift | rm0);
308 tcg_out32(s, (cond << 28) | (0 << 25) | (opc1 << 21) |
309 (rn1 << 16) | (rd1 << 12) | shift | rm1);
310 }
311 }
312
313 static inline void tcg_out_dat_imm(TCGContext *s,
314 int cond, int opc, int rd, int rn, int im)
315 {
316 tcg_out32(s, (cond << 28) | (1 << 25) | (opc << 21) | TO_CPSR(opc) |
317 (rn << 16) | (rd << 12) | im);
318 }
319
320 static inline void tcg_out_movi32(TCGContext *s,
321 int cond, int rd, int32_t arg)
322 {
323 int offset = (uint32_t) arg - ((uint32_t) s->code_ptr + 8);
324
325 /* TODO: This is very suboptimal, we can easily have a constant
326 * pool somewhere after all the instructions. */
327
328 if (arg < 0 && arg > -0x100)
329 return tcg_out_dat_imm(s, cond, ARITH_MVN, rd, 0, (~arg) & 0xff);
330
331 if (offset < 0x100 && offset > -0x100)
332 return offset >= 0 ?
333 tcg_out_dat_imm(s, cond, ARITH_ADD, rd, 15, offset) :
334 tcg_out_dat_imm(s, cond, ARITH_SUB, rd, 15, -offset);
335
336 tcg_out_dat_imm(s, cond, ARITH_MOV, rd, 0, arg & 0xff);
337 if (arg & 0x0000ff00)
338 tcg_out_dat_imm(s, cond, ARITH_ORR, rd, rd,
339 ((arg >> 8) & 0xff) | 0xc00);
340 if (arg & 0x00ff0000)
341 tcg_out_dat_imm(s, cond, ARITH_ORR, rd, rd,
342 ((arg >> 16) & 0xff) | 0x800);
343 if (arg & 0xff000000)
344 tcg_out_dat_imm(s, cond, ARITH_ORR, rd, rd,
345 ((arg >> 24) & 0xff) | 0x400);
346 }
347
348 static inline void tcg_out_mul32(TCGContext *s,
349 int cond, int rd, int rs, int rm)
350 {
351 if (rd != rm)
352 tcg_out32(s, (cond << 28) | (rd << 16) | (0 << 12) |
353 (rs << 8) | 0x90 | rm);
354 else if (rd != rs)
355 tcg_out32(s, (cond << 28) | (rd << 16) | (0 << 12) |
356 (rm << 8) | 0x90 | rs);
357 else {
358 tcg_out32(s, (cond << 28) | ( 8 << 16) | (0 << 12) |
359 (rs << 8) | 0x90 | rm);
360 tcg_out_dat_reg(s, cond, ARITH_MOV,
361 rd, 0, 8, SHIFT_IMM_LSL(0));
362 }
363 }
364
365 static inline void tcg_out_umull32(TCGContext *s,
366 int cond, int rd0, int rd1, int rs, int rm)
367 {
368 if (rd0 != rm && rd1 != rm)
369 tcg_out32(s, (cond << 28) | 0x800090 |
370 (rd1 << 16) | (rd0 << 12) | (rs << 8) | rm);
371 else if (rd0 != rs && rd1 != rs)
372 tcg_out32(s, (cond << 28) | 0x800090 |
373 (rd1 << 16) | (rd0 << 12) | (rm << 8) | rs);
374 else {
375 tcg_out_dat_reg(s, cond, ARITH_MOV,
376 TCG_REG_R8, 0, rm, SHIFT_IMM_LSL(0));
377 tcg_out32(s, (cond << 28) | 0x800098 |
378 (rd1 << 16) | (rd0 << 12) | (rs << 8));
379 }
380 }
381
382 static inline void tcg_out_smull32(TCGContext *s,
383 int cond, int rd0, int rd1, int rs, int rm)
384 {
385 if (rd0 != rm && rd1 != rm)
386 tcg_out32(s, (cond << 28) | 0xc00090 |
387 (rd1 << 16) | (rd0 << 12) | (rs << 8) | rm);
388 else if (rd0 != rs && rd1 != rs)
389 tcg_out32(s, (cond << 28) | 0xc00090 |
390 (rd1 << 16) | (rd0 << 12) | (rm << 8) | rs);
391 else {
392 tcg_out_dat_reg(s, cond, ARITH_MOV,
393 TCG_REG_R8, 0, rm, SHIFT_IMM_LSL(0));
394 tcg_out32(s, (cond << 28) | 0xc00098 |
395 (rd1 << 16) | (rd0 << 12) | (rs << 8));
396 }
397 }
398
399 static inline void tcg_out_ld32_12(TCGContext *s, int cond,
400 int rd, int rn, tcg_target_long im)
401 {
402 if (im >= 0)
403 tcg_out32(s, (cond << 28) | 0x05900000 |
404 (rn << 16) | (rd << 12) | (im & 0xfff));
405 else
406 tcg_out32(s, (cond << 28) | 0x05100000 |
407 (rn << 16) | (rd << 12) | ((-im) & 0xfff));
408 }
409
410 static inline void tcg_out_st32_12(TCGContext *s, int cond,
411 int rd, int rn, tcg_target_long im)
412 {
413 if (im >= 0)
414 tcg_out32(s, (cond << 28) | 0x05800000 |
415 (rn << 16) | (rd << 12) | (im & 0xfff));
416 else
417 tcg_out32(s, (cond << 28) | 0x05000000 |
418 (rn << 16) | (rd << 12) | ((-im) & 0xfff));
419 }
420
421 static inline void tcg_out_ld32_r(TCGContext *s, int cond,
422 int rd, int rn, int rm)
423 {
424 tcg_out32(s, (cond << 28) | 0x07900000 |
425 (rn << 16) | (rd << 12) | rm);
426 }
427
428 static inline void tcg_out_st32_r(TCGContext *s, int cond,
429 int rd, int rn, int rm)
430 {
431 tcg_out32(s, (cond << 28) | 0x07800000 |
432 (rn << 16) | (rd << 12) | rm);
433 }
434
435 /* Register pre-increment with base writeback. */
436 static inline void tcg_out_ld32_rwb(TCGContext *s, int cond,
437 int rd, int rn, int rm)
438 {
439 tcg_out32(s, (cond << 28) | 0x07b00000 |
440 (rn << 16) | (rd << 12) | rm);
441 }
442
443 static inline void tcg_out_st32_rwb(TCGContext *s, int cond,
444 int rd, int rn, int rm)
445 {
446 tcg_out32(s, (cond << 28) | 0x07a00000 |
447 (rn << 16) | (rd << 12) | rm);
448 }
449
450 static inline void tcg_out_ld16u_8(TCGContext *s, int cond,
451 int rd, int rn, tcg_target_long im)
452 {
453 if (im >= 0)
454 tcg_out32(s, (cond << 28) | 0x01d000b0 |
455 (rn << 16) | (rd << 12) |
456 ((im & 0xf0) << 4) | (im & 0xf));
457 else
458 tcg_out32(s, (cond << 28) | 0x015000b0 |
459 (rn << 16) | (rd << 12) |
460 (((-im) & 0xf0) << 4) | ((-im) & 0xf));
461 }
462
463 static inline void tcg_out_st16u_8(TCGContext *s, int cond,
464 int rd, int rn, tcg_target_long im)
465 {
466 if (im >= 0)
467 tcg_out32(s, (cond << 28) | 0x01c000b0 |
468 (rn << 16) | (rd << 12) |
469 ((im & 0xf0) << 4) | (im & 0xf));
470 else
471 tcg_out32(s, (cond << 28) | 0x014000b0 |
472 (rn << 16) | (rd << 12) |
473 (((-im) & 0xf0) << 4) | ((-im) & 0xf));
474 }
475
476 static inline void tcg_out_ld16u_r(TCGContext *s, int cond,
477 int rd, int rn, int rm)
478 {
479 tcg_out32(s, (cond << 28) | 0x019000b0 |
480 (rn << 16) | (rd << 12) | rm);
481 }
482
483 static inline void tcg_out_st16u_r(TCGContext *s, int cond,
484 int rd, int rn, int rm)
485 {
486 tcg_out32(s, (cond << 28) | 0x018000b0 |
487 (rn << 16) | (rd << 12) | rm);
488 }
489
490 static inline void tcg_out_ld16s_8(TCGContext *s, int cond,
491 int rd, int rn, tcg_target_long im)
492 {
493 if (im >= 0)
494 tcg_out32(s, (cond << 28) | 0x01d000f0 |
495 (rn << 16) | (rd << 12) |
496 ((im & 0xf0) << 4) | (im & 0xf));
497 else
498 tcg_out32(s, (cond << 28) | 0x015000f0 |
499 (rn << 16) | (rd << 12) |
500 (((-im) & 0xf0) << 4) | ((-im) & 0xf));
501 }
502
503 static inline void tcg_out_st16s_8(TCGContext *s, int cond,
504 int rd, int rn, tcg_target_long im)
505 {
506 if (im >= 0)
507 tcg_out32(s, (cond << 28) | 0x01c000f0 |
508 (rn << 16) | (rd << 12) |
509 ((im & 0xf0) << 4) | (im & 0xf));
510 else
511 tcg_out32(s, (cond << 28) | 0x014000f0 |
512 (rn << 16) | (rd << 12) |
513 (((-im) & 0xf0) << 4) | ((-im) & 0xf));
514 }
515
516 static inline void tcg_out_ld16s_r(TCGContext *s, int cond,
517 int rd, int rn, int rm)
518 {
519 tcg_out32(s, (cond << 28) | 0x019000f0 |
520 (rn << 16) | (rd << 12) | rm);
521 }
522
523 static inline void tcg_out_st16s_r(TCGContext *s, int cond,
524 int rd, int rn, int rm)
525 {
526 tcg_out32(s, (cond << 28) | 0x018000f0 |
527 (rn << 16) | (rd << 12) | rm);
528 }
529
530 static inline void tcg_out_ld8_12(TCGContext *s, int cond,
531 int rd, int rn, tcg_target_long im)
532 {
533 if (im >= 0)
534 tcg_out32(s, (cond << 28) | 0x05d00000 |
535 (rn << 16) | (rd << 12) | (im & 0xfff));
536 else
537 tcg_out32(s, (cond << 28) | 0x05500000 |
538 (rn << 16) | (rd << 12) | ((-im) & 0xfff));
539 }
540
541 static inline void tcg_out_st8_12(TCGContext *s, int cond,
542 int rd, int rn, tcg_target_long im)
543 {
544 if (im >= 0)
545 tcg_out32(s, (cond << 28) | 0x05c00000 |
546 (rn << 16) | (rd << 12) | (im & 0xfff));
547 else
548 tcg_out32(s, (cond << 28) | 0x05400000 |
549 (rn << 16) | (rd << 12) | ((-im) & 0xfff));
550 }
551
552 static inline void tcg_out_ld8_r(TCGContext *s, int cond,
553 int rd, int rn, int rm)
554 {
555 tcg_out32(s, (cond << 28) | 0x07d00000 |
556 (rn << 16) | (rd << 12) | rm);
557 }
558
559 static inline void tcg_out_st8_r(TCGContext *s, int cond,
560 int rd, int rn, int rm)
561 {
562 tcg_out32(s, (cond << 28) | 0x07c00000 |
563 (rn << 16) | (rd << 12) | rm);
564 }
565
566 static inline void tcg_out_ld8s_8(TCGContext *s, int cond,
567 int rd, int rn, tcg_target_long im)
568 {
569 if (im >= 0)
570 tcg_out32(s, (cond << 28) | 0x01d000d0 |
571 (rn << 16) | (rd << 12) |
572 ((im & 0xf0) << 4) | (im & 0xf));
573 else
574 tcg_out32(s, (cond << 28) | 0x015000d0 |
575 (rn << 16) | (rd << 12) |
576 (((-im) & 0xf0) << 4) | ((-im) & 0xf));
577 }
578
579 static inline void tcg_out_st8s_8(TCGContext *s, int cond,
580 int rd, int rn, tcg_target_long im)
581 {
582 if (im >= 0)
583 tcg_out32(s, (cond << 28) | 0x01c000d0 |
584 (rn << 16) | (rd << 12) |
585 ((im & 0xf0) << 4) | (im & 0xf));
586 else
587 tcg_out32(s, (cond << 28) | 0x014000d0 |
588 (rn << 16) | (rd << 12) |
589 (((-im) & 0xf0) << 4) | ((-im) & 0xf));
590 }
591
592 static inline void tcg_out_ld8s_r(TCGContext *s, int cond,
593 int rd, int rn, int rm)
594 {
595 tcg_out32(s, (cond << 28) | 0x019000d0 |
596 (rn << 16) | (rd << 12) | rm);
597 }
598
599 static inline void tcg_out_st8s_r(TCGContext *s, int cond,
600 int rd, int rn, int rm)
601 {
602 tcg_out32(s, (cond << 28) | 0x018000d0 |
603 (rn << 16) | (rd << 12) | rm);
604 }
605
606 static inline void tcg_out_ld32u(TCGContext *s, int cond,
607 int rd, int rn, int32_t offset)
608 {
609 if (offset > 0xfff || offset < -0xfff) {
610 tcg_out_movi32(s, cond, TCG_REG_R8, offset);
611 tcg_out_ld32_r(s, cond, rd, rn, TCG_REG_R8);
612 } else
613 tcg_out_ld32_12(s, cond, rd, rn, offset);
614 }
615
616 static inline void tcg_out_st32(TCGContext *s, int cond,
617 int rd, int rn, int32_t offset)
618 {
619 if (offset > 0xfff || offset < -0xfff) {
620 tcg_out_movi32(s, cond, TCG_REG_R8, offset);
621 tcg_out_st32_r(s, cond, rd, rn, TCG_REG_R8);
622 } else
623 tcg_out_st32_12(s, cond, rd, rn, offset);
624 }
625
626 static inline void tcg_out_ld16u(TCGContext *s, int cond,
627 int rd, int rn, int32_t offset)
628 {
629 if (offset > 0xff || offset < -0xff) {
630 tcg_out_movi32(s, cond, TCG_REG_R8, offset);
631 tcg_out_ld16u_r(s, cond, rd, rn, TCG_REG_R8);
632 } else
633 tcg_out_ld16u_8(s, cond, rd, rn, offset);
634 }
635
636 static inline void tcg_out_ld16s(TCGContext *s, int cond,
637 int rd, int rn, int32_t offset)
638 {
639 if (offset > 0xff || offset < -0xff) {
640 tcg_out_movi32(s, cond, TCG_REG_R8, offset);
641 tcg_out_ld16s_r(s, cond, rd, rn, TCG_REG_R8);
642 } else
643 tcg_out_ld16s_8(s, cond, rd, rn, offset);
644 }
645
646 static inline void tcg_out_st16u(TCGContext *s, int cond,
647 int rd, int rn, int32_t offset)
648 {
649 if (offset > 0xff || offset < -0xff) {
650 tcg_out_movi32(s, cond, TCG_REG_R8, offset);
651 tcg_out_st16u_r(s, cond, rd, rn, TCG_REG_R8);
652 } else
653 tcg_out_st16u_8(s, cond, rd, rn, offset);
654 }
655
656 static inline void tcg_out_ld8u(TCGContext *s, int cond,
657 int rd, int rn, int32_t offset)
658 {
659 if (offset > 0xfff || offset < -0xfff) {
660 tcg_out_movi32(s, cond, TCG_REG_R8, offset);
661 tcg_out_ld8_r(s, cond, rd, rn, TCG_REG_R8);
662 } else
663 tcg_out_ld8_12(s, cond, rd, rn, offset);
664 }
665
666 static inline void tcg_out_ld8s(TCGContext *s, int cond,
667 int rd, int rn, int32_t offset)
668 {
669 if (offset > 0xff || offset < -0xff) {
670 tcg_out_movi32(s, cond, TCG_REG_R8, offset);
671 tcg_out_ld8s_r(s, cond, rd, rn, TCG_REG_R8);
672 } else
673 tcg_out_ld8s_8(s, cond, rd, rn, offset);
674 }
675
676 static inline void tcg_out_st8u(TCGContext *s, int cond,
677 int rd, int rn, int32_t offset)
678 {
679 if (offset > 0xfff || offset < -0xfff) {
680 tcg_out_movi32(s, cond, TCG_REG_R8, offset);
681 tcg_out_st8_r(s, cond, rd, rn, TCG_REG_R8);
682 } else
683 tcg_out_st8_12(s, cond, rd, rn, offset);
684 }
685
686 static inline void tcg_out_goto(TCGContext *s, int cond, uint32_t addr)
687 {
688 int32_t val;
689
690 val = addr - (tcg_target_long) s->code_ptr;
691 if (val - 8 < 0x01fffffd && val - 8 > -0x01fffffd)
692 tcg_out_b(s, cond, val);
693 else {
694 #if 1
695 tcg_abort();
696 #else
697 if (cond == COND_AL) {
698 tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
699 tcg_out32(s, addr); /* XXX: This is l->u.value, can we use it? */
700 } else {
701 tcg_out_movi32(s, cond, TCG_REG_R8, val - 8);
702 tcg_out_dat_reg(s, cond, ARITH_ADD,
703 15, 15, TCG_REG_R8, SHIFT_IMM_LSL(0));
704 }
705 #endif
706 }
707 }
708
709 static inline void tcg_out_call(TCGContext *s, int cond, uint32_t addr)
710 {
711 int32_t val;
712
713 #ifdef SAVE_LR
714 tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R8, 0, 14, SHIFT_IMM_LSL(0));
715 #endif
716
717 val = addr - (tcg_target_long) s->code_ptr;
718 if (val < 0x01fffffd && val > -0x01fffffd)
719 tcg_out_bl(s, cond, val);
720 else {
721 #if 1
722 tcg_abort();
723 #else
724 if (cond == COND_AL) {
725 tcg_out_dat_imm(s, cond, ARITH_ADD, 14, 15, 4);
726 tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
727 tcg_out32(s, addr); /* XXX: This is l->u.value, can we use it? */
728 } else {
729 tcg_out_movi32(s, cond, TCG_REG_R9, addr);
730 tcg_out_dat_imm(s, cond, ARITH_MOV, 14, 0, 15);
731 tcg_out_bx(s, cond, TCG_REG_R9);
732 }
733 #endif
734 }
735
736 #ifdef SAVE_LR
737 tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, TCG_REG_R8, SHIFT_IMM_LSL(0));
738 #endif
739 }
740
741 static inline void tcg_out_callr(TCGContext *s, int cond, int arg)
742 {
743 #ifdef SAVE_LR
744 tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R8, 0, 14, SHIFT_IMM_LSL(0));
745 #endif
746 /* TODO: on ARMv5 and ARMv6 replace with tcg_out_blx(s, cond, arg); */
747 tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 15, SHIFT_IMM_LSL(0));
748 tcg_out_bx(s, cond, arg);
749 #ifdef SAVE_LR
750 tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, TCG_REG_R8, SHIFT_IMM_LSL(0));
751 #endif
752 }
753
754 static inline void tcg_out_goto_label(TCGContext *s, int cond, int label_index)
755 {
756 TCGLabel *l = &s->labels[label_index];
757
758 if (l->has_value)
759 tcg_out_goto(s, cond, l->u.value);
760 else if (cond == COND_AL) {
761 tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
762 tcg_out_reloc(s, s->code_ptr, R_ARM_ABS32, label_index, 31337);
763 s->code_ptr += 4;
764 } else {
765 /* Probably this should be preferred even for COND_AL... */
766 tcg_out_reloc(s, s->code_ptr, R_ARM_PC24, label_index, 31337);
767 tcg_out_b_noaddr(s, cond);
768 }
769 }
770
771 static void tcg_out_div_helper(TCGContext *s, int cond, const TCGArg *args,
772 void *helper_div, void *helper_rem, int shift)
773 {
774 int div_reg = args[0];
775 int rem_reg = args[1];
776
777 /* stmdb sp!, { r0 - r3, ip, lr } */
778 /* (Note that we need an even number of registers as per EABI) */
779 tcg_out32(s, (cond << 28) | 0x092d500f);
780
781 tcg_out_dat_reg(s, cond, ARITH_MOV, 0, 0, args[2], SHIFT_IMM_LSL(0));
782 tcg_out_dat_reg(s, cond, ARITH_MOV, 1, 0, args[3], SHIFT_IMM_LSL(0));
783 tcg_out_dat_reg(s, cond, ARITH_MOV, 2, 0, args[4], SHIFT_IMM_LSL(0));
784 tcg_out_dat_reg(s, cond, ARITH_MOV, 3, 0, 2, shift);
785
786 tcg_out_call(s, cond, (uint32_t) helper_div);
787 tcg_out_dat_reg(s, cond, ARITH_MOV, 8, 0, 0, SHIFT_IMM_LSL(0));
788
789 /* ldmia sp, { r0 - r3, fp, lr } */
790 tcg_out32(s, (cond << 28) | 0x089d500f);
791
792 tcg_out_dat_reg(s, cond, ARITH_MOV, 0, 0, args[2], SHIFT_IMM_LSL(0));
793 tcg_out_dat_reg(s, cond, ARITH_MOV, 1, 0, args[3], SHIFT_IMM_LSL(0));
794 tcg_out_dat_reg(s, cond, ARITH_MOV, 2, 0, args[4], SHIFT_IMM_LSL(0));
795 tcg_out_dat_reg(s, cond, ARITH_MOV, 3, 0, 2, shift);
796
797 tcg_out_call(s, cond, (uint32_t) helper_rem);
798
799 tcg_out_dat_reg(s, cond, ARITH_MOV, rem_reg, 0, 0, SHIFT_IMM_LSL(0));
800 tcg_out_dat_reg(s, cond, ARITH_MOV, div_reg, 0, 8, SHIFT_IMM_LSL(0));
801
802 /* ldr r0, [sp], #4 */
803 if (rem_reg != 0 && div_reg != 0)
804 tcg_out32(s, (cond << 28) | 0x04bd0004);
805 /* ldr r1, [sp], #4 */
806 if (rem_reg != 1 && div_reg != 1)
807 tcg_out32(s, (cond << 28) | 0x04bd1004);
808 /* ldr r2, [sp], #4 */
809 if (rem_reg != 2 && div_reg != 2)
810 tcg_out32(s, (cond << 28) | 0x04bd2004);
811 /* ldr r3, [sp], #4 */
812 if (rem_reg != 3 && div_reg != 3)
813 tcg_out32(s, (cond << 28) | 0x04bd3004);
814 /* ldr ip, [sp], #4 */
815 if (rem_reg != 12 && div_reg != 12)
816 tcg_out32(s, (cond << 28) | 0x04bdc004);
817 /* ldr lr, [sp], #4 */
818 if (rem_reg != 14 && div_reg != 14)
819 tcg_out32(s, (cond << 28) | 0x04bde004);
820 }
821
822 #ifdef CONFIG_SOFTMMU
823
824 #include "../../softmmu_defs.h"
825
826 static void *qemu_ld_helpers[4] = {
827 __ldb_mmu,
828 __ldw_mmu,
829 __ldl_mmu,
830 __ldq_mmu,
831 };
832
833 static void *qemu_st_helpers[4] = {
834 __stb_mmu,
835 __stw_mmu,
836 __stl_mmu,
837 __stq_mmu,
838 };
839 #endif
840
841 #define TLB_SHIFT (CPU_TLB_ENTRY_BITS + CPU_TLB_BITS)
842
843 static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
844 const TCGArg *args, int opc)
845 {
846 int addr_reg, data_reg, data_reg2;
847 #ifdef CONFIG_SOFTMMU
848 int mem_index, s_bits;
849 # if TARGET_LONG_BITS == 64
850 int addr_reg2;
851 # endif
852 uint32_t *label_ptr;
853 #endif
854
855 data_reg = *args++;
856 if (opc == 3)
857 data_reg2 = *args++;
858 else
859 data_reg2 = 0; /* surpress warning */
860 addr_reg = *args++;
861 #ifdef CONFIG_SOFTMMU
862 # if TARGET_LONG_BITS == 64
863 addr_reg2 = *args++;
864 # endif
865 mem_index = *args;
866 s_bits = opc & 3;
867
868 /* Should generate something like the following:
869 * shr r8, addr_reg, #TARGET_PAGE_BITS
870 * and r0, r8, #(CPU_TLB_SIZE - 1) @ Assumption: CPU_TLB_BITS <= 8
871 * add r0, env, r0 lsl #CPU_TLB_ENTRY_BITS
872 */
873 # if CPU_TLB_BITS > 8
874 # error
875 # endif
876 tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
877 8, 0, addr_reg, SHIFT_IMM_LSR(TARGET_PAGE_BITS));
878 tcg_out_dat_imm(s, COND_AL, ARITH_AND,
879 0, 8, CPU_TLB_SIZE - 1);
880 tcg_out_dat_reg(s, COND_AL, ARITH_ADD,
881 0, TCG_AREG0, 0, SHIFT_IMM_LSL(CPU_TLB_ENTRY_BITS));
882 /* In the
883 * ldr r1 [r0, #(offsetof(CPUState, tlb_table[mem_index][0].addr_read))]
884 * below, the offset is likely to exceed 12 bits if mem_index != 0 and
885 * not exceed otherwise, so use an
886 * add r0, r0, #(mem_index * sizeof *CPUState.tlb_table)
887 * before.
888 */
889 if (mem_index)
890 tcg_out_dat_imm(s, COND_AL, ARITH_ADD, 0, 0,
891 (mem_index << (TLB_SHIFT & 1)) |
892 ((16 - (TLB_SHIFT >> 1)) << 8));
893 tcg_out_ld32_12(s, COND_AL, 1, 0,
894 offsetof(CPUState, tlb_table[0][0].addr_read));
895 tcg_out_dat_reg(s, COND_AL, ARITH_CMP,
896 0, 1, 8, SHIFT_IMM_LSL(TARGET_PAGE_BITS));
897 /* Check alignment. */
898 if (s_bits)
899 tcg_out_dat_imm(s, COND_EQ, ARITH_TST,
900 0, addr_reg, (1 << s_bits) - 1);
901 # if TARGET_LONG_BITS == 64
902 /* XXX: possibly we could use a block data load or writeback in
903 * the first access. */
904 tcg_out_ld32_12(s, COND_EQ, 1, 0,
905 offsetof(CPUState, tlb_table[0][0].addr_read) + 4);
906 tcg_out_dat_reg(s, COND_EQ, ARITH_CMP,
907 0, 1, addr_reg2, SHIFT_IMM_LSL(0));
908 # endif
909 tcg_out_ld32_12(s, COND_EQ, 1, 0,
910 offsetof(CPUState, tlb_table[0][0].addend));
911
912 switch (opc) {
913 case 0:
914 tcg_out_ld8_r(s, COND_EQ, data_reg, addr_reg, 1);
915 break;
916 case 0 | 4:
917 tcg_out_ld8s_r(s, COND_EQ, data_reg, addr_reg, 1);
918 break;
919 case 1:
920 tcg_out_ld16u_r(s, COND_EQ, data_reg, addr_reg, 1);
921 break;
922 case 1 | 4:
923 tcg_out_ld16s_r(s, COND_EQ, data_reg, addr_reg, 1);
924 break;
925 case 2:
926 default:
927 tcg_out_ld32_r(s, COND_EQ, data_reg, addr_reg, 1);
928 break;
929 case 3:
930 tcg_out_ld32_rwb(s, COND_EQ, data_reg, 1, addr_reg);
931 tcg_out_ld32_12(s, COND_EQ, data_reg2, 1, 4);
932 break;
933 }
934
935 label_ptr = (void *) s->code_ptr;
936 tcg_out_b(s, COND_EQ, 8);
937
938 # ifdef SAVE_LR
939 tcg_out_dat_reg(s, cond, ARITH_MOV, 8, 0, 14, SHIFT_IMM_LSL(0));
940 # endif
941
942 /* TODO: move this code to where the constants pool will be */
943 if (addr_reg)
944 tcg_out_dat_reg(s, cond, ARITH_MOV,
945 0, 0, addr_reg, SHIFT_IMM_LSL(0));
946 # if TARGET_LONG_BITS == 32
947 tcg_out_dat_imm(s, cond, ARITH_MOV, 1, 0, mem_index);
948 # else
949 if (addr_reg2 != 1)
950 tcg_out_dat_reg(s, cond, ARITH_MOV,
951 1, 0, addr_reg2, SHIFT_IMM_LSL(0));
952 tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
953 # endif
954 tcg_out_bl(s, cond, (tcg_target_long) qemu_ld_helpers[s_bits] -
955 (tcg_target_long) s->code_ptr);
956
957 switch (opc) {
958 case 0 | 4:
959 tcg_out_dat_reg(s, cond, ARITH_MOV,
960 0, 0, 0, SHIFT_IMM_LSL(24));
961 tcg_out_dat_reg(s, cond, ARITH_MOV,
962 data_reg, 0, 0, SHIFT_IMM_ASR(24));
963 break;
964 case 1 | 4:
965 tcg_out_dat_reg(s, cond, ARITH_MOV,
966 0, 0, 0, SHIFT_IMM_LSL(16));
967 tcg_out_dat_reg(s, cond, ARITH_MOV,
968 data_reg, 0, 0, SHIFT_IMM_ASR(16));
969 break;
970 case 0:
971 case 1:
972 case 2:
973 default:
974 if (data_reg)
975 tcg_out_dat_reg(s, cond, ARITH_MOV,
976 data_reg, 0, 0, SHIFT_IMM_LSL(0));
977 break;
978 case 3:
979 if (data_reg != 0)
980 tcg_out_dat_reg(s, cond, ARITH_MOV,
981 data_reg, 0, 0, SHIFT_IMM_LSL(0));
982 if (data_reg2 != 1)
983 tcg_out_dat_reg(s, cond, ARITH_MOV,
984 data_reg2, 0, 1, SHIFT_IMM_LSL(0));
985 break;
986 }
987
988 # ifdef SAVE_LR
989 tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 8, SHIFT_IMM_LSL(0));
990 # endif
991
992 *label_ptr += ((void *) s->code_ptr - (void *) label_ptr - 8) >> 2;
993 #else
994 switch (opc) {
995 case 0:
996 tcg_out_ld8_12(s, COND_AL, data_reg, addr_reg, 0);
997 break;
998 case 0 | 4:
999 tcg_out_ld8s_8(s, COND_AL, data_reg, addr_reg, 0);
1000 break;
1001 case 1:
1002 tcg_out_ld16u_8(s, COND_AL, data_reg, addr_reg, 0);
1003 break;
1004 case 1 | 4:
1005 tcg_out_ld16s_8(s, COND_AL, data_reg, addr_reg, 0);
1006 break;
1007 case 2:
1008 default:
1009 tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
1010 break;
1011 case 3:
1012 /* TODO: use block load -
1013 * check that data_reg2 > data_reg or the other way */
1014 if (data_reg == addr_reg) {
1015 tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, 4);
1016 tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
1017 } else {
1018 tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
1019 tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, 4);
1020 }
1021 break;
1022 }
1023 #endif
1024 }
1025
1026 static inline void tcg_out_qemu_st(TCGContext *s, int cond,
1027 const TCGArg *args, int opc)
1028 {
1029 int addr_reg, data_reg, data_reg2;
1030 #ifdef CONFIG_SOFTMMU
1031 int mem_index, s_bits;
1032 # if TARGET_LONG_BITS == 64
1033 int addr_reg2;
1034 # endif
1035 uint32_t *label_ptr;
1036 #endif
1037
1038 data_reg = *args++;
1039 if (opc == 3)
1040 data_reg2 = *args++;
1041 else
1042 data_reg2 = 0; /* surpress warning */
1043 addr_reg = *args++;
1044 #ifdef CONFIG_SOFTMMU
1045 # if TARGET_LONG_BITS == 64
1046 addr_reg2 = *args++;
1047 # endif
1048 mem_index = *args;
1049 s_bits = opc & 3;
1050
1051 /* Should generate something like the following:
1052 * shr r8, addr_reg, #TARGET_PAGE_BITS
1053 * and r0, r8, #(CPU_TLB_SIZE - 1) @ Assumption: CPU_TLB_BITS <= 8
1054 * add r0, env, r0 lsl #CPU_TLB_ENTRY_BITS
1055 */
1056 tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
1057 8, 0, addr_reg, SHIFT_IMM_LSR(TARGET_PAGE_BITS));
1058 tcg_out_dat_imm(s, COND_AL, ARITH_AND,
1059 0, 8, CPU_TLB_SIZE - 1);
1060 tcg_out_dat_reg(s, COND_AL, ARITH_ADD,
1061 0, TCG_AREG0, 0, SHIFT_IMM_LSL(CPU_TLB_ENTRY_BITS));
1062 /* In the
1063 * ldr r1 [r0, #(offsetof(CPUState, tlb_table[mem_index][0].addr_write))]
1064 * below, the offset is likely to exceed 12 bits if mem_index != 0 and
1065 * not exceed otherwise, so use an
1066 * add r0, r0, #(mem_index * sizeof *CPUState.tlb_table)
1067 * before.
1068 */
1069 if (mem_index)
1070 tcg_out_dat_imm(s, COND_AL, ARITH_ADD, 0, 0,
1071 (mem_index << (TLB_SHIFT & 1)) |
1072 ((16 - (TLB_SHIFT >> 1)) << 8));
1073 tcg_out_ld32_12(s, COND_AL, 1, 0,
1074 offsetof(CPUState, tlb_table[0][0].addr_write));
1075 tcg_out_dat_reg(s, COND_AL, ARITH_CMP,
1076 0, 1, 8, SHIFT_IMM_LSL(TARGET_PAGE_BITS));
1077 /* Check alignment. */
1078 if (s_bits)
1079 tcg_out_dat_imm(s, COND_EQ, ARITH_TST,
1080 0, addr_reg, (1 << s_bits) - 1);
1081 # if TARGET_LONG_BITS == 64
1082 /* XXX: possibly we could use a block data load or writeback in
1083 * the first access. */
1084 tcg_out_ld32_12(s, COND_EQ, 1, 0,
1085 offsetof(CPUState, tlb_table[0][0].addr_write)
1086 + 4);
1087 tcg_out_dat_reg(s, COND_EQ, ARITH_CMP,
1088 0, 1, addr_reg2, SHIFT_IMM_LSL(0));
1089 # endif
1090 tcg_out_ld32_12(s, COND_EQ, 1, 0,
1091 offsetof(CPUState, tlb_table[0][0].addend));
1092
1093 switch (opc) {
1094 case 0:
1095 tcg_out_st8_r(s, COND_EQ, data_reg, addr_reg, 1);
1096 break;
1097 case 0 | 4:
1098 tcg_out_st8s_r(s, COND_EQ, data_reg, addr_reg, 1);
1099 break;
1100 case 1:
1101 tcg_out_st16u_r(s, COND_EQ, data_reg, addr_reg, 1);
1102 break;
1103 case 1 | 4:
1104 tcg_out_st16s_r(s, COND_EQ, data_reg, addr_reg, 1);
1105 break;
1106 case 2:
1107 default:
1108 tcg_out_st32_r(s, COND_EQ, data_reg, addr_reg, 1);
1109 break;
1110 case 3:
1111 tcg_out_st32_rwb(s, COND_EQ, data_reg, 1, addr_reg);
1112 tcg_out_st32_12(s, COND_EQ, data_reg2, 1, 4);
1113 break;
1114 }
1115
1116 label_ptr = (void *) s->code_ptr;
1117 tcg_out_b(s, COND_EQ, 8);
1118
1119 /* TODO: move this code to where the constants pool will be */
1120 if (addr_reg)
1121 tcg_out_dat_reg(s, cond, ARITH_MOV,
1122 0, 0, addr_reg, SHIFT_IMM_LSL(0));
1123 # if TARGET_LONG_BITS == 32
1124 switch (opc) {
1125 case 0:
1126 tcg_out_dat_imm(s, cond, ARITH_AND, 1, data_reg, 0xff);
1127 tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
1128 break;
1129 case 1:
1130 tcg_out_dat_reg(s, cond, ARITH_MOV,
1131 1, 0, data_reg, SHIFT_IMM_LSL(16));
1132 tcg_out_dat_reg(s, cond, ARITH_MOV,
1133 1, 0, 1, SHIFT_IMM_LSR(16));
1134 tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
1135 break;
1136 case 2:
1137 if (data_reg != 1)
1138 tcg_out_dat_reg(s, cond, ARITH_MOV,
1139 1, 0, data_reg, SHIFT_IMM_LSL(0));
1140 tcg_out_dat_imm(s, cond, ARITH_MOV, 2, 0, mem_index);
1141 break;
1142 case 3:
1143 if (data_reg != 1)
1144 tcg_out_dat_reg(s, cond, ARITH_MOV,
1145 1, 0, data_reg, SHIFT_IMM_LSL(0));
1146 if (data_reg2 != 2)
1147 tcg_out_dat_reg(s, cond, ARITH_MOV,
1148 2, 0, data_reg2, SHIFT_IMM_LSL(0));
1149 tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
1150 break;
1151 }
1152 # else
1153 if (addr_reg2 != 1)
1154 tcg_out_dat_reg(s, cond, ARITH_MOV,
1155 1, 0, addr_reg2, SHIFT_IMM_LSL(0));
1156 switch (opc) {
1157 case 0:
1158 tcg_out_dat_imm(s, cond, ARITH_AND, 2, data_reg, 0xff);
1159 tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
1160 break;
1161 case 1:
1162 tcg_out_dat_reg(s, cond, ARITH_MOV,
1163 2, 0, data_reg, SHIFT_IMM_LSL(16));
1164 tcg_out_dat_reg(s, cond, ARITH_MOV,
1165 2, 0, 2, SHIFT_IMM_LSR(16));
1166 tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
1167 break;
1168 case 2:
1169 if (data_reg != 2)
1170 tcg_out_dat_reg(s, cond, ARITH_MOV,
1171 2, 0, data_reg, SHIFT_IMM_LSL(0));
1172 tcg_out_dat_imm(s, cond, ARITH_MOV, 3, 0, mem_index);
1173 break;
1174 case 3:
1175 tcg_out_dat_imm(s, cond, ARITH_MOV, 8, 0, mem_index);
1176 tcg_out32(s, (cond << 28) | 0x052d8010); /* str r8, [sp, #-0x10]! */
1177 if (data_reg != 2)
1178 tcg_out_dat_reg(s, cond, ARITH_MOV,
1179 2, 0, data_reg, SHIFT_IMM_LSL(0));
1180 if (data_reg2 != 3)
1181 tcg_out_dat_reg(s, cond, ARITH_MOV,
1182 3, 0, data_reg2, SHIFT_IMM_LSL(0));
1183 break;
1184 }
1185 # endif
1186
1187 # ifdef SAVE_LR
1188 tcg_out_dat_reg(s, cond, ARITH_MOV, 8, 0, 14, SHIFT_IMM_LSL(0));
1189 # endif
1190
1191 tcg_out_bl(s, cond, (tcg_target_long) qemu_st_helpers[s_bits] -
1192 (tcg_target_long) s->code_ptr);
1193 # if TARGET_LONG_BITS == 64
1194 if (opc == 3)
1195 tcg_out_dat_imm(s, cond, ARITH_ADD, 13, 13, 0x10);
1196 # endif
1197
1198 # ifdef SAVE_LR
1199 tcg_out_dat_reg(s, cond, ARITH_MOV, 14, 0, 8, SHIFT_IMM_LSL(0));
1200 # endif
1201
1202 *label_ptr += ((void *) s->code_ptr - (void *) label_ptr - 8) >> 2;
1203 #else
1204 switch (opc) {
1205 case 0:
1206 tcg_out_st8_12(s, COND_AL, data_reg, addr_reg, 0);
1207 break;
1208 case 0 | 4:
1209 tcg_out_st8s_8(s, COND_AL, data_reg, addr_reg, 0);
1210 break;
1211 case 1:
1212 tcg_out_st16u_8(s, COND_AL, data_reg, addr_reg, 0);
1213 break;
1214 case 1 | 4:
1215 tcg_out_st16s_8(s, COND_AL, data_reg, addr_reg, 0);
1216 break;
1217 case 2:
1218 default:
1219 tcg_out_st32_12(s, COND_AL, data_reg, addr_reg, 0);
1220 break;
1221 case 3:
1222 /* TODO: use block store -
1223 * check that data_reg2 > data_reg or the other way */
1224 tcg_out_st32_12(s, COND_AL, data_reg, addr_reg, 0);
1225 tcg_out_st32_12(s, COND_AL, data_reg2, addr_reg, 4);
1226 break;
1227 }
1228 #endif
1229 }
1230
1231 static uint8_t *tb_ret_addr;
1232
1233 static inline void tcg_out_op(TCGContext *s, int opc,
1234 const TCGArg *args, const int *const_args)
1235 {
1236 int c;
1237
1238 switch (opc) {
1239 case INDEX_op_exit_tb:
1240 #ifdef SAVE_LR
1241 if (args[0] >> 8)
1242 tcg_out_ld32_12(s, COND_AL, TCG_REG_R0, 15, 0);
1243 else
1244 tcg_out_dat_imm(s, COND_AL, ARITH_MOV, TCG_REG_R0, 0, args[0]);
1245 tcg_out_dat_reg(s, COND_AL, ARITH_MOV, 15, 0, 14, SHIFT_IMM_LSL(0));
1246 if (args[0] >> 8)
1247 tcg_out32(s, args[0]);
1248 #else
1249 {
1250 uint8_t *ld_ptr = s->code_ptr;
1251 if (args[0] >> 8)
1252 tcg_out_ld32_12(s, COND_AL, 0, 15, 0);
1253 else
1254 tcg_out_dat_imm(s, COND_AL, ARITH_MOV, 0, 0, args[0]);
1255 tcg_out_goto(s, COND_AL, (tcg_target_ulong) tb_ret_addr);
1256 if (args[0] >> 8) {
1257 *ld_ptr = (uint8_t) (s->code_ptr - ld_ptr) - 8;
1258 tcg_out32(s, args[0]);
1259 }
1260 }
1261 #endif
1262 break;
1263 case INDEX_op_goto_tb:
1264 if (s->tb_jmp_offset) {
1265 /* Direct jump method */
1266 #if defined(USE_DIRECT_JUMP)
1267 s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;
1268 tcg_out_b(s, COND_AL, 8);
1269 #else
1270 tcg_out_ld32_12(s, COND_AL, 15, 15, -4);
1271 s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;
1272 tcg_out32(s, 0);
1273 #endif
1274 } else {
1275 /* Indirect jump method */
1276 #if 1
1277 c = (int) (s->tb_next + args[0]) - ((int) s->code_ptr + 8);
1278 if (c > 0xfff || c < -0xfff) {
1279 tcg_out_movi32(s, COND_AL, TCG_REG_R0,
1280 (tcg_target_long) (s->tb_next + args[0]));
1281 tcg_out_ld32_12(s, COND_AL, 15, TCG_REG_R0, 0);
1282 } else
1283 tcg_out_ld32_12(s, COND_AL, 15, 15, c);
1284 #else
1285 tcg_out_ld32_12(s, COND_AL, TCG_REG_R0, 15, 0);
1286 tcg_out_ld32_12(s, COND_AL, 15, TCG_REG_R0, 0);
1287 tcg_out32(s, (tcg_target_long) (s->tb_next + args[0]));
1288 #endif
1289 }
1290 s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
1291 break;
1292 case INDEX_op_call:
1293 if (const_args[0])
1294 tcg_out_call(s, COND_AL, args[0]);
1295 else
1296 tcg_out_callr(s, COND_AL, args[0]);
1297 break;
1298 case INDEX_op_jmp:
1299 if (const_args[0])
1300 tcg_out_goto(s, COND_AL, args[0]);
1301 else
1302 tcg_out_bx(s, COND_AL, args[0]);
1303 break;
1304 case INDEX_op_br:
1305 tcg_out_goto_label(s, COND_AL, args[0]);
1306 break;
1307
1308 case INDEX_op_ld8u_i32:
1309 tcg_out_ld8u(s, COND_AL, args[0], args[1], args[2]);
1310 break;
1311 case INDEX_op_ld8s_i32:
1312 tcg_out_ld8s(s, COND_AL, args[0], args[1], args[2]);
1313 break;
1314 case INDEX_op_ld16u_i32:
1315 tcg_out_ld16u(s, COND_AL, args[0], args[1], args[2]);
1316 break;
1317 case INDEX_op_ld16s_i32:
1318 tcg_out_ld16s(s, COND_AL, args[0], args[1], args[2]);
1319 break;
1320 case INDEX_op_ld_i32:
1321 tcg_out_ld32u(s, COND_AL, args[0], args[1], args[2]);
1322 break;
1323 case INDEX_op_st8_i32:
1324 tcg_out_st8u(s, COND_AL, args[0], args[1], args[2]);
1325 break;
1326 case INDEX_op_st16_i32:
1327 tcg_out_st16u(s, COND_AL, args[0], args[1], args[2]);
1328 break;
1329 case INDEX_op_st_i32:
1330 tcg_out_st32(s, COND_AL, args[0], args[1], args[2]);
1331 break;
1332
1333 case INDEX_op_mov_i32:
1334 tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
1335 args[0], 0, args[1], SHIFT_IMM_LSL(0));
1336 break;
1337 case INDEX_op_movi_i32:
1338 tcg_out_movi32(s, COND_AL, args[0], args[1]);
1339 break;
1340 case INDEX_op_add_i32:
1341 c = ARITH_ADD;
1342 goto gen_arith;
1343 case INDEX_op_sub_i32:
1344 c = ARITH_SUB;
1345 goto gen_arith;
1346 case INDEX_op_and_i32:
1347 c = ARITH_AND;
1348 goto gen_arith;
1349 case INDEX_op_or_i32:
1350 c = ARITH_ORR;
1351 goto gen_arith;
1352 case INDEX_op_xor_i32:
1353 c = ARITH_EOR;
1354 /* Fall through. */
1355 gen_arith:
1356 tcg_out_dat_reg(s, COND_AL, c,
1357 args[0], args[1], args[2], SHIFT_IMM_LSL(0));
1358 break;
1359 case INDEX_op_add2_i32:
1360 tcg_out_dat_reg2(s, COND_AL, ARITH_ADD, ARITH_ADC,
1361 args[0], args[1], args[2], args[3],
1362 args[4], args[5], SHIFT_IMM_LSL(0));
1363 break;
1364 case INDEX_op_sub2_i32:
1365 tcg_out_dat_reg2(s, COND_AL, ARITH_SUB, ARITH_SBC,
1366 args[0], args[1], args[2], args[3],
1367 args[4], args[5], SHIFT_IMM_LSL(0));
1368 break;
1369 case INDEX_op_neg_i32:
1370 tcg_out_dat_imm(s, COND_AL, ARITH_RSB, args[0], args[1], 0);
1371 break;
1372 case INDEX_op_mul_i32:
1373 tcg_out_mul32(s, COND_AL, args[0], args[1], args[2]);
1374 break;
1375 case INDEX_op_mulu2_i32:
1376 tcg_out_umull32(s, COND_AL, args[0], args[1], args[2], args[3]);
1377 break;
1378 case INDEX_op_div2_i32:
1379 tcg_out_div_helper(s, COND_AL, args,
1380 tcg_helper_div_i64, tcg_helper_rem_i64,
1381 SHIFT_IMM_ASR(31));
1382 break;
1383 case INDEX_op_divu2_i32:
1384 tcg_out_div_helper(s, COND_AL, args,
1385 tcg_helper_divu_i64, tcg_helper_remu_i64,
1386 SHIFT_IMM_LSR(31));
1387 break;
1388 /* XXX: Perhaps args[2] & 0x1f is wrong */
1389 case INDEX_op_shl_i32:
1390 c = const_args[2] ?
1391 SHIFT_IMM_LSL(args[2] & 0x1f) : SHIFT_REG_LSL(args[2]);
1392 goto gen_shift32;
1393 case INDEX_op_shr_i32:
1394 c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_LSR(args[2] & 0x1f) :
1395 SHIFT_IMM_LSL(0) : SHIFT_REG_LSR(args[2]);
1396 goto gen_shift32;
1397 case INDEX_op_sar_i32:
1398 c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_ASR(args[2] & 0x1f) :
1399 SHIFT_IMM_LSL(0) : SHIFT_REG_ASR(args[2]);
1400 /* Fall through. */
1401 gen_shift32:
1402 tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], c);
1403 break;
1404
1405 case INDEX_op_brcond_i32:
1406 tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0,
1407 args[0], args[1], SHIFT_IMM_LSL(0));
1408 tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[2]], args[3]);
1409 break;
1410 case INDEX_op_brcond2_i32:
1411 /* The resulting conditions are:
1412 * TCG_COND_EQ --> a0 == a2 && a1 == a3,
1413 * TCG_COND_NE --> (a0 != a2 && a1 == a3) || a1 != a3,
1414 * TCG_COND_LT(U) --> (a0 < a2 && a1 == a3) || a1 < a3,
1415 * TCG_COND_GE(U) --> (a0 >= a2 && a1 == a3) || (a1 >= a3 && a1 != a3),
1416 * TCG_COND_LE(U) --> (a0 <= a2 && a1 == a3) || (a1 <= a3 && a1 != a3),
1417 * TCG_COND_GT(U) --> (a0 > a2 && a1 == a3) || a1 > a3,
1418 */
1419 tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0,
1420 args[1], args[3], SHIFT_IMM_LSL(0));
1421 tcg_out_dat_reg(s, COND_EQ, ARITH_CMP, 0,
1422 args[0], args[2], SHIFT_IMM_LSL(0));
1423 tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[4]], args[5]);
1424 break;
1425
1426 case INDEX_op_qemu_ld8u:
1427 tcg_out_qemu_ld(s, COND_AL, args, 0);
1428 break;
1429 case INDEX_op_qemu_ld8s:
1430 tcg_out_qemu_ld(s, COND_AL, args, 0 | 4);
1431 break;
1432 case INDEX_op_qemu_ld16u:
1433 tcg_out_qemu_ld(s, COND_AL, args, 1);
1434 break;
1435 case INDEX_op_qemu_ld16s:
1436 tcg_out_qemu_ld(s, COND_AL, args, 1 | 4);
1437 break;
1438 case INDEX_op_qemu_ld32u:
1439 tcg_out_qemu_ld(s, COND_AL, args, 2);
1440 break;
1441 case INDEX_op_qemu_ld64:
1442 tcg_out_qemu_ld(s, COND_AL, args, 3);
1443 break;
1444
1445 case INDEX_op_qemu_st8:
1446 tcg_out_qemu_st(s, COND_AL, args, 0);
1447 break;
1448 case INDEX_op_qemu_st16:
1449 tcg_out_qemu_st(s, COND_AL, args, 1);
1450 break;
1451 case INDEX_op_qemu_st32:
1452 tcg_out_qemu_st(s, COND_AL, args, 2);
1453 break;
1454 case INDEX_op_qemu_st64:
1455 tcg_out_qemu_st(s, COND_AL, args, 3);
1456 break;
1457
1458 case INDEX_op_ext8s_i32:
1459 tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
1460 args[0], 0, args[1], SHIFT_IMM_LSL(24));
1461 tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
1462 args[0], 0, args[0], SHIFT_IMM_ASR(24));
1463 break;
1464 case INDEX_op_ext16s_i32:
1465 tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
1466 args[0], 0, args[1], SHIFT_IMM_LSL(16));
1467 tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
1468 args[0], 0, args[0], SHIFT_IMM_ASR(16));
1469 break;
1470
1471 default:
1472 tcg_abort();
1473 }
1474 }
1475
1476 static const TCGTargetOpDef arm_op_defs[] = {
1477 { INDEX_op_exit_tb, { } },
1478 { INDEX_op_goto_tb, { } },
1479 { INDEX_op_call, { "ri" } },
1480 { INDEX_op_jmp, { "ri" } },
1481 { INDEX_op_br, { } },
1482
1483 { INDEX_op_mov_i32, { "r", "r" } },
1484 { INDEX_op_movi_i32, { "r" } },
1485
1486 { INDEX_op_ld8u_i32, { "r", "r" } },
1487 { INDEX_op_ld8s_i32, { "r", "r" } },
1488 { INDEX_op_ld16u_i32, { "r", "r" } },
1489 { INDEX_op_ld16s_i32, { "r", "r" } },
1490 { INDEX_op_ld_i32, { "r", "r" } },
1491 { INDEX_op_st8_i32, { "r", "r" } },
1492 { INDEX_op_st16_i32, { "r", "r" } },
1493 { INDEX_op_st_i32, { "r", "r" } },
1494
1495 /* TODO: "r", "r", "ri" */
1496 { INDEX_op_add_i32, { "r", "r", "r" } },
1497 { INDEX_op_sub_i32, { "r", "r", "r" } },
1498 { INDEX_op_mul_i32, { "r", "r", "r" } },
1499 { INDEX_op_mulu2_i32, { "r", "r", "r", "r" } },
1500 { INDEX_op_div2_i32, { "r", "r", "r", "1", "2" } },
1501 { INDEX_op_divu2_i32, { "r", "r", "r", "1", "2" } },
1502 { INDEX_op_and_i32, { "r", "r", "r" } },
1503 { INDEX_op_or_i32, { "r", "r", "r" } },
1504 { INDEX_op_xor_i32, { "r", "r", "r" } },
1505 { INDEX_op_neg_i32, { "r", "r" } },
1506
1507 { INDEX_op_shl_i32, { "r", "r", "ri" } },
1508 { INDEX_op_shr_i32, { "r", "r", "ri" } },
1509 { INDEX_op_sar_i32, { "r", "r", "ri" } },
1510
1511 { INDEX_op_brcond_i32, { "r", "r" } },
1512
1513 /* TODO: "r", "r", "r", "r", "ri", "ri" */
1514 { INDEX_op_add2_i32, { "r", "r", "r", "r", "r", "r" } },
1515 { INDEX_op_sub2_i32, { "r", "r", "r", "r", "r", "r" } },
1516 { INDEX_op_brcond2_i32, { "r", "r", "r", "r" } },
1517
1518 { INDEX_op_qemu_ld8u, { "r", "x", "X" } },
1519 { INDEX_op_qemu_ld8s, { "r", "x", "X" } },
1520 { INDEX_op_qemu_ld16u, { "r", "x", "X" } },
1521 { INDEX_op_qemu_ld16s, { "r", "x", "X" } },
1522 { INDEX_op_qemu_ld32u, { "r", "x", "X" } },
1523 { INDEX_op_qemu_ld64, { "d", "r", "x", "X" } },
1524
1525 { INDEX_op_qemu_st8, { "x", "x", "X" } },
1526 { INDEX_op_qemu_st16, { "x", "x", "X" } },
1527 { INDEX_op_qemu_st32, { "x", "x", "X" } },
1528 { INDEX_op_qemu_st64, { "x", "D", "x", "X" } },
1529
1530 { INDEX_op_ext8s_i32, { "r", "r" } },
1531 { INDEX_op_ext16s_i32, { "r", "r" } },
1532
1533 { -1 },
1534 };
1535
1536 void tcg_target_init(TCGContext *s)
1537 {
1538 /* fail safe */
1539 if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry))
1540 tcg_abort();
1541
1542 tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0,
1543 ((2 << TCG_REG_R14) - 1) & ~(1 << TCG_REG_R8));
1544 tcg_regset_set32(tcg_target_call_clobber_regs, 0,
1545 ((2 << TCG_REG_R3) - 1) |
1546 (1 << TCG_REG_R12) | (1 << TCG_REG_R14));
1547
1548 tcg_regset_clear(s->reserved_regs);
1549 #ifdef SAVE_LR
1550 tcg_regset_set_reg(s->reserved_regs, TCG_REG_R14);
1551 #endif
1552 tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
1553 tcg_regset_set_reg(s->reserved_regs, TCG_REG_R8);
1554
1555 tcg_add_target_add_op_defs(arm_op_defs);
1556 }
1557
1558 static inline void tcg_out_ld(TCGContext *s, TCGType type, int arg,
1559 int arg1, tcg_target_long arg2)
1560 {
1561 tcg_out_ld32u(s, COND_AL, arg, arg1, arg2);
1562 }
1563
1564 static inline void tcg_out_st(TCGContext *s, TCGType type, int arg,
1565 int arg1, tcg_target_long arg2)
1566 {
1567 tcg_out_st32(s, COND_AL, arg, arg1, arg2);
1568 }
1569
1570 void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
1571 {
1572 if (val > 0)
1573 if (val < 0x100)
1574 tcg_out_dat_imm(s, COND_AL, ARITH_ADD, reg, reg, val);
1575 else
1576 tcg_abort();
1577 else if (val < 0) {
1578 if (val > -0x100)
1579 tcg_out_dat_imm(s, COND_AL, ARITH_SUB, reg, reg, -val);
1580 else
1581 tcg_abort();
1582 }
1583 }
1584
1585 static inline void tcg_out_mov(TCGContext *s, int ret, int arg)
1586 {
1587 tcg_out_dat_reg(s, COND_AL, ARITH_MOV, ret, 0, arg, SHIFT_IMM_LSL(0));
1588 }
1589
1590 static inline void tcg_out_movi(TCGContext *s, TCGType type,
1591 int ret, tcg_target_long arg)
1592 {
1593 tcg_out_movi32(s, COND_AL, ret, arg);
1594 }
1595
1596 void tcg_target_qemu_prologue(TCGContext *s)
1597 {
1598 /* stmdb sp!, { r9 - r11, lr } */
1599 tcg_out32(s, (COND_AL << 28) | 0x092d4e00);
1600
1601 tcg_out_bx(s, COND_AL, TCG_REG_R0);
1602 tb_ret_addr = s->code_ptr;
1603
1604 /* ldmia sp!, { r9 - r11, pc } */
1605 tcg_out32(s, (COND_AL << 28) | 0x08bd8e00);
1606 }
QEmu