1 /*
2 * Tiny Code Generator for QEMU
3 *
4 * Copyright (c) 2008 Fabrice Bellard
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 "%rax",
28 "%rcx",
29 "%rdx",
30 "%rbx",
31 "%rsp",
32 "%rbp",
33 "%rsi",
34 "%rdi",
35 "%r8",
36 "%r9",
37 "%r10",
38 "%r11",
39 "%r12",
40 "%r13",
41 "%r14",
42 "%r15",
43 };
44 #endif
45
46 static const int tcg_target_reg_alloc_order[] = {
47 TCG_REG_RBP,
48 TCG_REG_RBX,
49 TCG_REG_R12,
50 TCG_REG_R13,
51 TCG_REG_R14,
52 TCG_REG_R15,
53 TCG_REG_R10,
54 TCG_REG_R11,
55 TCG_REG_R9,
56 TCG_REG_R8,
57 TCG_REG_RCX,
58 TCG_REG_RDX,
59 TCG_REG_RSI,
60 TCG_REG_RDI,
61 TCG_REG_RAX,
62 };
63
64 static const int tcg_target_call_iarg_regs[6] = {
65 TCG_REG_RDI,
66 TCG_REG_RSI,
67 TCG_REG_RDX,
68 TCG_REG_RCX,
69 TCG_REG_R8,
70 TCG_REG_R9,
71 };
72
73 static const int tcg_target_call_oarg_regs[2] = {
74 TCG_REG_RAX,
75 TCG_REG_RDX
76 };
77
78 static uint8_t *tb_ret_addr;
79
patch_reloc(uint8_t * code_ptr,int type,tcg_target_long value,tcg_target_long addend)80 static void patch_reloc(uint8_t *code_ptr, int type,
81 tcg_target_long value, tcg_target_long addend)
82 {
83 value += addend;
84 switch(type) {
85 case R_X86_64_32:
86 if (value != (uint32_t)value)
87 tcg_abort();
88 *(uint32_t *)code_ptr = value;
89 break;
90 case R_X86_64_32S:
91 if (value != (int32_t)value)
92 tcg_abort();
93 *(uint32_t *)code_ptr = value;
94 break;
95 case R_386_PC32:
96 value -= (long)code_ptr;
97 if (value != (int32_t)value)
98 tcg_abort();
99 *(uint32_t *)code_ptr = value;
100 break;
101 default:
102 tcg_abort();
103 }
104 }
105
106 /* maximum number of register used for input function arguments */
tcg_target_get_call_iarg_regs_count(int flags)107 static inline int tcg_target_get_call_iarg_regs_count(int flags)
108 {
109 return 6;
110 }
111
112 /* parse target specific constraints */
target_parse_constraint(TCGArgConstraint * ct,const char ** pct_str)113 static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)
114 {
115 const char *ct_str;
116
117 ct_str = *pct_str;
118 switch(ct_str[0]) {
119 case 'a':
120 ct->ct |= TCG_CT_REG;
121 tcg_regset_set_reg(ct->u.regs, TCG_REG_RAX);
122 break;
123 case 'b':
124 ct->ct |= TCG_CT_REG;
125 tcg_regset_set_reg(ct->u.regs, TCG_REG_RBX);
126 break;
127 case 'c':
128 ct->ct |= TCG_CT_REG;
129 tcg_regset_set_reg(ct->u.regs, TCG_REG_RCX);
130 break;
131 case 'd':
132 ct->ct |= TCG_CT_REG;
133 tcg_regset_set_reg(ct->u.regs, TCG_REG_RDX);
134 break;
135 case 'S':
136 ct->ct |= TCG_CT_REG;
137 tcg_regset_set_reg(ct->u.regs, TCG_REG_RSI);
138 break;
139 case 'D':
140 ct->ct |= TCG_CT_REG;
141 tcg_regset_set_reg(ct->u.regs, TCG_REG_RDI);
142 break;
143 case 'q':
144 ct->ct |= TCG_CT_REG;
145 tcg_regset_set32(ct->u.regs, 0, 0xf);
146 break;
147 case 'r':
148 ct->ct |= TCG_CT_REG;
149 tcg_regset_set32(ct->u.regs, 0, 0xffff);
150 break;
151 case 'L': /* qemu_ld/st constraint */
152 ct->ct |= TCG_CT_REG;
153 tcg_regset_set32(ct->u.regs, 0, 0xffff);
154 tcg_regset_reset_reg(ct->u.regs, TCG_REG_RSI);
155 tcg_regset_reset_reg(ct->u.regs, TCG_REG_RDI);
156 break;
157 case 'e':
158 ct->ct |= TCG_CT_CONST_S32;
159 break;
160 case 'Z':
161 ct->ct |= TCG_CT_CONST_U32;
162 break;
163 default:
164 return -1;
165 }
166 ct_str++;
167 *pct_str = ct_str;
168 return 0;
169 }
170
171 /* test if a constant matches the constraint */
tcg_target_const_match(tcg_target_long val,const TCGArgConstraint * arg_ct)172 static inline int tcg_target_const_match(tcg_target_long val,
173 const TCGArgConstraint *arg_ct)
174 {
175 int ct;
176 ct = arg_ct->ct;
177 if (ct & TCG_CT_CONST)
178 return 1;
179 else if ((ct & TCG_CT_CONST_S32) && val == (int32_t)val)
180 return 1;
181 else if ((ct & TCG_CT_CONST_U32) && val == (uint32_t)val)
182 return 1;
183 else
184 return 0;
185 }
186
187 #define ARITH_ADD 0
188 #define ARITH_OR 1
189 #define ARITH_ADC 2
190 #define ARITH_SBB 3
191 #define ARITH_AND 4
192 #define ARITH_SUB 5
193 #define ARITH_XOR 6
194 #define ARITH_CMP 7
195
196 #define SHIFT_ROL 0
197 #define SHIFT_ROR 1
198 #define SHIFT_SHL 4
199 #define SHIFT_SHR 5
200 #define SHIFT_SAR 7
201
202 #define JCC_JMP (-1)
203 #define JCC_JO 0x0
204 #define JCC_JNO 0x1
205 #define JCC_JB 0x2
206 #define JCC_JAE 0x3
207 #define JCC_JE 0x4
208 #define JCC_JNE 0x5
209 #define JCC_JBE 0x6
210 #define JCC_JA 0x7
211 #define JCC_JS 0x8
212 #define JCC_JNS 0x9
213 #define JCC_JP 0xa
214 #define JCC_JNP 0xb
215 #define JCC_JL 0xc
216 #define JCC_JGE 0xd
217 #define JCC_JLE 0xe
218 #define JCC_JG 0xf
219
220 #define P_EXT 0x100 /* 0x0f opcode prefix */
221 #define P_REXW 0x200 /* set rex.w = 1 */
222 #define P_REXB_R 0x400 /* REG field as byte register */
223 #define P_REXB_RM 0x800 /* R/M field as byte register */
224
225 static const uint8_t tcg_cond_to_jcc[10] = {
226 [TCG_COND_EQ] = JCC_JE,
227 [TCG_COND_NE] = JCC_JNE,
228 [TCG_COND_LT] = JCC_JL,
229 [TCG_COND_GE] = JCC_JGE,
230 [TCG_COND_LE] = JCC_JLE,
231 [TCG_COND_GT] = JCC_JG,
232 [TCG_COND_LTU] = JCC_JB,
233 [TCG_COND_GEU] = JCC_JAE,
234 [TCG_COND_LEU] = JCC_JBE,
235 [TCG_COND_GTU] = JCC_JA,
236 };
237
tcg_out_opc(TCGContext * s,int opc,int r,int rm,int x)238 static void tcg_out_opc(TCGContext *s, int opc, int r, int rm, int x)
239 {
240 int rex = 0;
241
242 rex |= (opc & P_REXW) >> 6; /* REX.W */
243 rex |= (r & 8) >> 1; /* REX.R */
244 rex |= (x & 8) >> 2; /* REX.X */
245 rex |= (rm & 8) >> 3; /* REX.B */
246
247 /* P_REXB_{R,RM} indicates that the given register is the low byte.
248 For %[abcd]l we need no REX prefix, but for %{si,di,bp,sp}l we do,
249 as otherwise the encoding indicates %[abcd]h. Note that the values
250 that are ORed in merely indicate that the REX byte must be present;
251 those bits get discarded in output. */
252 rex |= opc & (r >= 4 ? P_REXB_R : 0);
253 rex |= opc & (rm >= 4 ? P_REXB_RM : 0);
254
255 if (rex) {
256 tcg_out8(s, (uint8_t)(rex | 0x40));
257 }
258 if (opc & P_EXT) {
259 tcg_out8(s, 0x0f);
260 }
261 tcg_out8(s, opc & 0xff);
262 }
263
tcg_out_modrm(TCGContext * s,int opc,int r,int rm)264 static inline void tcg_out_modrm(TCGContext *s, int opc, int r, int rm)
265 {
266 tcg_out_opc(s, opc, r, rm, 0);
267 tcg_out8(s, 0xc0 | ((r & 7) << 3) | (rm & 7));
268 }
269
270 /* rm < 0 means no register index plus (-rm - 1 immediate bytes) */
tcg_out_modrm_offset(TCGContext * s,int opc,int r,int rm,tcg_target_long offset)271 static inline void tcg_out_modrm_offset(TCGContext *s, int opc, int r, int rm,
272 tcg_target_long offset)
273 {
274 if (rm < 0) {
275 tcg_target_long val;
276 tcg_out_opc(s, opc, r, 0, 0);
277 val = offset - ((tcg_target_long)s->code_ptr + 5 + (-rm - 1));
278 if (val == (int32_t)val) {
279 /* eip relative */
280 tcg_out8(s, 0x05 | ((r & 7) << 3));
281 tcg_out32(s, val);
282 } else if (offset == (int32_t)offset) {
283 tcg_out8(s, 0x04 | ((r & 7) << 3));
284 tcg_out8(s, 0x25); /* sib */
285 tcg_out32(s, offset);
286 } else {
287 tcg_abort();
288 }
289 } else if (offset == 0 && (rm & 7) != TCG_REG_RBP) {
290 tcg_out_opc(s, opc, r, rm, 0);
291 if ((rm & 7) == TCG_REG_RSP) {
292 tcg_out8(s, 0x04 | ((r & 7) << 3));
293 tcg_out8(s, 0x24);
294 } else {
295 tcg_out8(s, 0x00 | ((r & 7) << 3) | (rm & 7));
296 }
297 } else if ((int8_t)offset == offset) {
298 tcg_out_opc(s, opc, r, rm, 0);
299 if ((rm & 7) == TCG_REG_RSP) {
300 tcg_out8(s, 0x44 | ((r & 7) << 3));
301 tcg_out8(s, 0x24);
302 } else {
303 tcg_out8(s, 0x40 | ((r & 7) << 3) | (rm & 7));
304 }
305 tcg_out8(s, offset);
306 } else {
307 tcg_out_opc(s, opc, r, rm, 0);
308 if ((rm & 7) == TCG_REG_RSP) {
309 tcg_out8(s, 0x84 | ((r & 7) << 3));
310 tcg_out8(s, 0x24);
311 } else {
312 tcg_out8(s, 0x80 | ((r & 7) << 3) | (rm & 7));
313 }
314 tcg_out32(s, offset);
315 }
316 }
317
318 #if defined(CONFIG_SOFTMMU)
319 /* XXX: incomplete. index must be different from ESP */
tcg_out_modrm_offset2(TCGContext * s,int opc,int r,int rm,int index,int shift,tcg_target_long offset)320 static void tcg_out_modrm_offset2(TCGContext *s, int opc, int r, int rm,
321 int index, int shift,
322 tcg_target_long offset)
323 {
324 int mod;
325 if (rm == -1)
326 tcg_abort();
327 if (offset == 0 && (rm & 7) != TCG_REG_RBP) {
328 mod = 0;
329 } else if (offset == (int8_t)offset) {
330 mod = 0x40;
331 } else if (offset == (int32_t)offset) {
332 mod = 0x80;
333 } else {
334 tcg_abort();
335 }
336 if (index == -1) {
337 tcg_out_opc(s, opc, r, rm, 0);
338 if ((rm & 7) == TCG_REG_RSP) {
339 tcg_out8(s, mod | ((r & 7) << 3) | 0x04);
340 tcg_out8(s, 0x04 | (rm & 7));
341 } else {
342 tcg_out8(s, mod | ((r & 7) << 3) | (rm & 7));
343 }
344 } else {
345 tcg_out_opc(s, opc, r, rm, index);
346 tcg_out8(s, mod | ((r & 7) << 3) | 0x04);
347 tcg_out8(s, (shift << 6) | ((index & 7) << 3) | (rm & 7));
348 }
349 if (mod == 0x40) {
350 tcg_out8(s, offset);
351 } else if (mod == 0x80) {
352 tcg_out32(s, offset);
353 }
354 }
355 #endif
356
tcg_out_mov(TCGContext * s,int ret,int arg)357 static inline void tcg_out_mov(TCGContext *s, int ret, int arg)
358 {
359 tcg_out_modrm(s, 0x8b | P_REXW, ret, arg);
360 }
361
tcg_out_movi(TCGContext * s,TCGType type,int ret,tcg_target_long arg)362 static inline void tcg_out_movi(TCGContext *s, TCGType type,
363 int ret, tcg_target_long arg)
364 {
365 if (arg == 0) {
366 tcg_out_modrm(s, 0x01 | (ARITH_XOR << 3), ret, ret); /* xor r0,r0 */
367 } else if (arg == (uint32_t)arg || type == TCG_TYPE_I32) {
368 tcg_out_opc(s, 0xb8 + (ret & 7), 0, ret, 0);
369 tcg_out32(s, arg);
370 } else if (arg == (int32_t)arg) {
371 tcg_out_modrm(s, 0xc7 | P_REXW, 0, ret);
372 tcg_out32(s, arg);
373 } else {
374 tcg_out_opc(s, (0xb8 + (ret & 7)) | P_REXW, 0, ret, 0);
375 tcg_out32(s, arg);
376 tcg_out32(s, arg >> 32);
377 }
378 }
379
tcg_out_goto(TCGContext * s,int call,uint8_t * target)380 static void tcg_out_goto(TCGContext *s, int call, uint8_t *target)
381 {
382 int32_t disp;
383
384 disp = target - s->code_ptr - 5;
385 if (disp == (target - s->code_ptr - 5)) {
386 tcg_out8(s, call ? 0xe8 : 0xe9);
387 tcg_out32(s, disp);
388 } else {
389 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R10, (tcg_target_long) target);
390 tcg_out_modrm(s, 0xff, call ? 2 : 4, TCG_REG_R10);
391 }
392 }
393
tcg_out_ld(TCGContext * s,TCGType type,int ret,int arg1,tcg_target_long arg2)394 static inline void tcg_out_ld(TCGContext *s, TCGType type, int ret,
395 int arg1, tcg_target_long arg2)
396 {
397 if (type == TCG_TYPE_I32)
398 tcg_out_modrm_offset(s, 0x8b, ret, arg1, arg2); /* movl */
399 else
400 tcg_out_modrm_offset(s, 0x8b | P_REXW, ret, arg1, arg2); /* movq */
401 }
402
tcg_out_st(TCGContext * s,TCGType type,int arg,int arg1,tcg_target_long arg2)403 static inline void tcg_out_st(TCGContext *s, TCGType type, int arg,
404 int arg1, tcg_target_long arg2)
405 {
406 if (type == TCG_TYPE_I32)
407 tcg_out_modrm_offset(s, 0x89, arg, arg1, arg2); /* movl */
408 else
409 tcg_out_modrm_offset(s, 0x89 | P_REXW, arg, arg1, arg2); /* movq */
410 }
411
tgen_arithi32(TCGContext * s,int c,int r0,int32_t val)412 static inline void tgen_arithi32(TCGContext *s, int c, int r0, int32_t val)
413 {
414 if ((c == ARITH_ADD && val == 1) || (c == ARITH_SUB && val == -1)) {
415 /* inc */
416 tcg_out_modrm(s, 0xff, 0, r0);
417 } else if ((c == ARITH_ADD && val == -1) || (c == ARITH_SUB && val == 1)) {
418 /* dec */
419 tcg_out_modrm(s, 0xff, 1, r0);
420 } else if (val == (int8_t)val) {
421 tcg_out_modrm(s, 0x83, c, r0);
422 tcg_out8(s, val);
423 } else if (c == ARITH_AND && val == 0xffu) {
424 /* movzbl */
425 tcg_out_modrm(s, 0xb6 | P_EXT | P_REXB_RM, r0, r0);
426 } else if (c == ARITH_AND && val == 0xffffu) {
427 /* movzwl */
428 tcg_out_modrm(s, 0xb7 | P_EXT, r0, r0);
429 } else {
430 tcg_out_modrm(s, 0x81, c, r0);
431 tcg_out32(s, val);
432 }
433 }
434
tgen_arithi64(TCGContext * s,int c,int r0,int64_t val)435 static inline void tgen_arithi64(TCGContext *s, int c, int r0, int64_t val)
436 {
437 if ((c == ARITH_ADD && val == 1) || (c == ARITH_SUB && val == -1)) {
438 /* inc */
439 tcg_out_modrm(s, 0xff | P_REXW, 0, r0);
440 } else if ((c == ARITH_ADD && val == -1) || (c == ARITH_SUB && val == 1)) {
441 /* dec */
442 tcg_out_modrm(s, 0xff | P_REXW, 1, r0);
443 } else if (c == ARITH_AND && val == 0xffffffffu) {
444 /* 32-bit mov zero extends */
445 tcg_out_modrm(s, 0x8b, r0, r0);
446 } else if (c == ARITH_AND && val == (uint32_t)val) {
447 /* AND with no high bits set can use a 32-bit operation. */
448 tgen_arithi32(s, c, r0, (uint32_t)val);
449 } else if (val == (int8_t)val) {
450 tcg_out_modrm(s, 0x83 | P_REXW, c, r0);
451 tcg_out8(s, val);
452 } else if (val == (int32_t)val) {
453 tcg_out_modrm(s, 0x81 | P_REXW, c, r0);
454 tcg_out32(s, val);
455 } else {
456 tcg_abort();
457 }
458 }
459
tcg_out_addi(TCGContext * s,int reg,tcg_target_long val)460 static void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)
461 {
462 if (val != 0)
463 tgen_arithi64(s, ARITH_ADD, reg, val);
464 }
465
tcg_out_jxx(TCGContext * s,int opc,int label_index)466 static void tcg_out_jxx(TCGContext *s, int opc, int label_index)
467 {
468 int32_t val, val1;
469 TCGLabel *l = &s->labels[label_index];
470
471 if (l->has_value) {
472 val = l->u.value - (tcg_target_long)s->code_ptr;
473 val1 = val - 2;
474 if ((int8_t)val1 == val1) {
475 if (opc == -1)
476 tcg_out8(s, 0xeb);
477 else
478 tcg_out8(s, 0x70 + opc);
479 tcg_out8(s, val1);
480 } else {
481 if (opc == -1) {
482 tcg_out8(s, 0xe9);
483 tcg_out32(s, val - 5);
484 } else {
485 tcg_out8(s, 0x0f);
486 tcg_out8(s, 0x80 + opc);
487 tcg_out32(s, val - 6);
488 }
489 }
490 } else {
491 if (opc == -1) {
492 tcg_out8(s, 0xe9);
493 } else {
494 tcg_out8(s, 0x0f);
495 tcg_out8(s, 0x80 + opc);
496 }
497 tcg_out_reloc(s, s->code_ptr, R_386_PC32, label_index, -4);
498 s->code_ptr += 4;
499 }
500 }
501
tcg_out_cmp(TCGContext * s,TCGArg arg1,TCGArg arg2,int const_arg2,int rexw)502 static void tcg_out_cmp(TCGContext *s, TCGArg arg1, TCGArg arg2,
503 int const_arg2, int rexw)
504 {
505 if (const_arg2) {
506 if (arg2 == 0) {
507 /* test r, r */
508 tcg_out_modrm(s, 0x85 | rexw, arg1, arg1);
509 } else {
510 if (rexw) {
511 tgen_arithi64(s, ARITH_CMP, arg1, arg2);
512 } else {
513 tgen_arithi32(s, ARITH_CMP, arg1, arg2);
514 }
515 }
516 } else {
517 tcg_out_modrm(s, 0x01 | (ARITH_CMP << 3) | rexw, arg2, arg1);
518 }
519 }
520
tcg_out_brcond(TCGContext * s,int cond,TCGArg arg1,TCGArg arg2,int const_arg2,int label_index,int rexw)521 static void tcg_out_brcond(TCGContext *s, int cond,
522 TCGArg arg1, TCGArg arg2, int const_arg2,
523 int label_index, int rexw)
524 {
525 tcg_out_cmp(s, arg1, arg2, const_arg2, rexw);
526 tcg_out_jxx(s, tcg_cond_to_jcc[cond], label_index);
527 }
528
tcg_out_setcond(TCGContext * s,int cond,TCGArg dest,TCGArg arg1,TCGArg arg2,int const_arg2,int rexw)529 static void tcg_out_setcond(TCGContext *s, int cond, TCGArg dest,
530 TCGArg arg1, TCGArg arg2, int const_arg2, int rexw)
531 {
532 tcg_out_cmp(s, arg1, arg2, const_arg2, rexw);
533 /* setcc */
534 tcg_out_modrm(s, 0x90 | tcg_cond_to_jcc[cond] | P_EXT | P_REXB_RM, 0, dest);
535 tgen_arithi32(s, ARITH_AND, dest, 0xff);
536 }
537
538 #if defined(CONFIG_SOFTMMU)
539
540 #include "../../softmmu_defs.h"
541
542 static void *qemu_ld_helpers[4] = {
543 __ldb_mmu,
544 __ldw_mmu,
545 __ldl_mmu,
546 __ldq_mmu,
547 };
548
549 static void *qemu_st_helpers[4] = {
550 __stb_mmu,
551 __stw_mmu,
552 __stl_mmu,
553 __stq_mmu,
554 };
555 #endif
556
tcg_out_qemu_ld(TCGContext * s,const TCGArg * args,int opc)557 static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args,
558 int opc)
559 {
560 int addr_reg, data_reg, r0, r1, mem_index, s_bits, bswap, rexw;
561 int32_t offset;
562 #if defined(CONFIG_SOFTMMU)
563 uint8_t *label1_ptr, *label2_ptr;
564 #endif
565
566 data_reg = *args++;
567 addr_reg = *args++;
568 mem_index = *args;
569 s_bits = opc & 3;
570
571 r0 = TCG_REG_RDI;
572 r1 = TCG_REG_RSI;
573
574 #if TARGET_LONG_BITS == 32
575 rexw = 0;
576 #else
577 rexw = P_REXW;
578 #endif
579 #if defined(CONFIG_SOFTMMU)
580 /* mov */
581 tcg_out_modrm(s, 0x8b | rexw, r1, addr_reg);
582
583 /* mov */
584 tcg_out_modrm(s, 0x8b | rexw, r0, addr_reg);
585
586 tcg_out_modrm(s, 0xc1 | rexw, 5, r1); /* shr $x, r1 */
587 tcg_out8(s, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
588
589 tcg_out_modrm(s, 0x81 | rexw, 4, r0); /* andl $x, r0 */
590 tcg_out32(s, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
591
592 tcg_out_modrm(s, 0x81, 4, r1); /* andl $x, r1 */
593 tcg_out32(s, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS);
594
595 /* lea offset(r1, env), r1 */
596 tcg_out_modrm_offset2(s, 0x8d | P_REXW, r1, r1, TCG_AREG0, 0,
597 offsetof(CPUState, tlb_table[mem_index][0].addr_read));
598
599 /* cmp 0(r1), r0 */
600 tcg_out_modrm_offset(s, 0x3b | rexw, r0, r1, 0);
601
602 /* mov */
603 tcg_out_modrm(s, 0x8b | rexw, r0, addr_reg);
604
605 /* je label1 */
606 tcg_out8(s, 0x70 + JCC_JE);
607 label1_ptr = s->code_ptr;
608 s->code_ptr++;
609
610 /* XXX: move that code at the end of the TB */
611 tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_RSI, mem_index);
612 tcg_out_goto(s, 1, qemu_ld_helpers[s_bits]);
613
614 switch(opc) {
615 case 0 | 4:
616 /* movsbq */
617 tcg_out_modrm(s, 0xbe | P_EXT | P_REXW, data_reg, TCG_REG_RAX);
618 break;
619 case 1 | 4:
620 /* movswq */
621 tcg_out_modrm(s, 0xbf | P_EXT | P_REXW, data_reg, TCG_REG_RAX);
622 break;
623 case 2 | 4:
624 /* movslq */
625 tcg_out_modrm(s, 0x63 | P_REXW, data_reg, TCG_REG_RAX);
626 break;
627 case 0:
628 /* movzbq */
629 tcg_out_modrm(s, 0xb6 | P_EXT | P_REXW, data_reg, TCG_REG_RAX);
630 break;
631 case 1:
632 /* movzwq */
633 tcg_out_modrm(s, 0xb7 | P_EXT | P_REXW, data_reg, TCG_REG_RAX);
634 break;
635 case 2:
636 default:
637 /* movl */
638 tcg_out_modrm(s, 0x8b, data_reg, TCG_REG_RAX);
639 break;
640 case 3:
641 tcg_out_mov(s, data_reg, TCG_REG_RAX);
642 break;
643 }
644
645 /* jmp label2 */
646 tcg_out8(s, 0xeb);
647 label2_ptr = s->code_ptr;
648 s->code_ptr++;
649
650 /* label1: */
651 *label1_ptr = s->code_ptr - label1_ptr - 1;
652
653 /* add x(r1), r0 */
654 tcg_out_modrm_offset(s, 0x03 | P_REXW, r0, r1, offsetof(CPUTLBEntry, addend) -
655 offsetof(CPUTLBEntry, addr_read));
656 offset = 0;
657 #else
658 if (GUEST_BASE == (int32_t)GUEST_BASE) {
659 r0 = addr_reg;
660 offset = GUEST_BASE;
661 } else {
662 offset = 0;
663 /* movq $GUEST_BASE, r0 */
664 tcg_out_opc(s, (0xb8 + (r0 & 7)) | P_REXW, 0, r0, 0);
665 tcg_out32(s, GUEST_BASE);
666 tcg_out32(s, GUEST_BASE >> 32);
667 /* addq addr_reg, r0 */
668 tcg_out_modrm(s, 0x01 | P_REXW, addr_reg, r0);
669 }
670 #endif
671
672 #ifdef TARGET_WORDS_BIGENDIAN
673 bswap = 1;
674 #else
675 bswap = 0;
676 #endif
677 switch(opc) {
678 case 0:
679 /* movzbl */
680 tcg_out_modrm_offset(s, 0xb6 | P_EXT, data_reg, r0, offset);
681 break;
682 case 0 | 4:
683 /* movsbX */
684 tcg_out_modrm_offset(s, 0xbe | P_EXT | rexw, data_reg, r0, offset);
685 break;
686 case 1:
687 /* movzwl */
688 tcg_out_modrm_offset(s, 0xb7 | P_EXT, data_reg, r0, offset);
689 if (bswap) {
690 /* rolw $8, data_reg */
691 tcg_out8(s, 0x66);
692 tcg_out_modrm(s, 0xc1, 0, data_reg);
693 tcg_out8(s, 8);
694 }
695 break;
696 case 1 | 4:
697 if (bswap) {
698 /* movzwl */
699 tcg_out_modrm_offset(s, 0xb7 | P_EXT, data_reg, r0, offset);
700 /* rolw $8, data_reg */
701 tcg_out8(s, 0x66);
702 tcg_out_modrm(s, 0xc1, 0, data_reg);
703 tcg_out8(s, 8);
704
705 /* movswX data_reg, data_reg */
706 tcg_out_modrm(s, 0xbf | P_EXT | rexw, data_reg, data_reg);
707 } else {
708 /* movswX */
709 tcg_out_modrm_offset(s, 0xbf | P_EXT | rexw, data_reg, r0, offset);
710 }
711 break;
712 case 2:
713 /* movl (r0), data_reg */
714 tcg_out_modrm_offset(s, 0x8b, data_reg, r0, offset);
715 if (bswap) {
716 /* bswap */
717 tcg_out_opc(s, (0xc8 + (data_reg & 7)) | P_EXT, 0, data_reg, 0);
718 }
719 break;
720 case 2 | 4:
721 if (bswap) {
722 /* movl (r0), data_reg */
723 tcg_out_modrm_offset(s, 0x8b, data_reg, r0, offset);
724 /* bswap */
725 tcg_out_opc(s, (0xc8 + (data_reg & 7)) | P_EXT, 0, data_reg, 0);
726 /* movslq */
727 tcg_out_modrm(s, 0x63 | P_REXW, data_reg, data_reg);
728 } else {
729 /* movslq */
730 tcg_out_modrm_offset(s, 0x63 | P_REXW, data_reg, r0, offset);
731 }
732 break;
733 case 3:
734 /* movq (r0), data_reg */
735 tcg_out_modrm_offset(s, 0x8b | P_REXW, data_reg, r0, offset);
736 if (bswap) {
737 /* bswap */
738 tcg_out_opc(s, (0xc8 + (data_reg & 7)) | P_EXT | P_REXW, 0, data_reg, 0);
739 }
740 break;
741 default:
742 tcg_abort();
743 }
744
745 #if defined(CONFIG_SOFTMMU)
746 /* label2: */
747 *label2_ptr = s->code_ptr - label2_ptr - 1;
748 #endif
749 }
750
tcg_out_qemu_st(TCGContext * s,const TCGArg * args,int opc)751 static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,
752 int opc)
753 {
754 int addr_reg, data_reg, r0, r1, mem_index, s_bits, bswap, rexw;
755 int32_t offset;
756 #if defined(CONFIG_SOFTMMU)
757 uint8_t *label1_ptr, *label2_ptr;
758 #endif
759
760 data_reg = *args++;
761 addr_reg = *args++;
762 mem_index = *args;
763
764 s_bits = opc;
765
766 r0 = TCG_REG_RDI;
767 r1 = TCG_REG_RSI;
768
769 #if TARGET_LONG_BITS == 32
770 rexw = 0;
771 #else
772 rexw = P_REXW;
773 #endif
774 #if defined(CONFIG_SOFTMMU)
775 /* mov */
776 tcg_out_modrm(s, 0x8b | rexw, r1, addr_reg);
777
778 /* mov */
779 tcg_out_modrm(s, 0x8b | rexw, r0, addr_reg);
780
781 tcg_out_modrm(s, 0xc1 | rexw, 5, r1); /* shr $x, r1 */
782 tcg_out8(s, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
783
784 tcg_out_modrm(s, 0x81 | rexw, 4, r0); /* andl $x, r0 */
785 tcg_out32(s, TARGET_PAGE_MASK | ((1 << s_bits) - 1));
786
787 tcg_out_modrm(s, 0x81, 4, r1); /* andl $x, r1 */
788 tcg_out32(s, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS);
789
790 /* lea offset(r1, env), r1 */
791 tcg_out_modrm_offset2(s, 0x8d | P_REXW, r1, r1, TCG_AREG0, 0,
792 offsetof(CPUState, tlb_table[mem_index][0].addr_write));
793
794 /* cmp 0(r1), r0 */
795 tcg_out_modrm_offset(s, 0x3b | rexw, r0, r1, 0);
796
797 /* mov */
798 tcg_out_modrm(s, 0x8b | rexw, r0, addr_reg);
799
800 /* je label1 */
801 tcg_out8(s, 0x70 + JCC_JE);
802 label1_ptr = s->code_ptr;
803 s->code_ptr++;
804
805 /* XXX: move that code at the end of the TB */
806 switch(opc) {
807 case 0:
808 /* movzbl */
809 tcg_out_modrm(s, 0xb6 | P_EXT | P_REXB_RM, TCG_REG_RSI, data_reg);
810 break;
811 case 1:
812 /* movzwl */
813 tcg_out_modrm(s, 0xb7 | P_EXT, TCG_REG_RSI, data_reg);
814 break;
815 case 2:
816 /* movl */
817 tcg_out_modrm(s, 0x8b, TCG_REG_RSI, data_reg);
818 break;
819 default:
820 case 3:
821 tcg_out_mov(s, TCG_REG_RSI, data_reg);
822 break;
823 }
824 tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_RDX, mem_index);
825 tcg_out_goto(s, 1, qemu_st_helpers[s_bits]);
826
827 /* jmp label2 */
828 tcg_out8(s, 0xeb);
829 label2_ptr = s->code_ptr;
830 s->code_ptr++;
831
832 /* label1: */
833 *label1_ptr = s->code_ptr - label1_ptr - 1;
834
835 /* add x(r1), r0 */
836 tcg_out_modrm_offset(s, 0x03 | P_REXW, r0, r1, offsetof(CPUTLBEntry, addend) -
837 offsetof(CPUTLBEntry, addr_write));
838 offset = 0;
839 #else
840 if (GUEST_BASE == (int32_t)GUEST_BASE) {
841 r0 = addr_reg;
842 offset = GUEST_BASE;
843 } else {
844 offset = 0;
845 /* movq $GUEST_BASE, r0 */
846 tcg_out_opc(s, (0xb8 + (r0 & 7)) | P_REXW, 0, r0, 0);
847 tcg_out32(s, GUEST_BASE);
848 tcg_out32(s, GUEST_BASE >> 32);
849 /* addq addr_reg, r0 */
850 tcg_out_modrm(s, 0x01 | P_REXW, addr_reg, r0);
851 }
852 #endif
853
854 #ifdef TARGET_WORDS_BIGENDIAN
855 bswap = 1;
856 #else
857 bswap = 0;
858 #endif
859 switch(opc) {
860 case 0:
861 /* movb */
862 tcg_out_modrm_offset(s, 0x88 | P_REXB_R, data_reg, r0, offset);
863 break;
864 case 1:
865 if (bswap) {
866 tcg_out_modrm(s, 0x8b, r1, data_reg); /* movl */
867 tcg_out8(s, 0x66); /* rolw $8, %ecx */
868 tcg_out_modrm(s, 0xc1, 0, r1);
869 tcg_out8(s, 8);
870 data_reg = r1;
871 }
872 /* movw */
873 tcg_out8(s, 0x66);
874 tcg_out_modrm_offset(s, 0x89, data_reg, r0, offset);
875 break;
876 case 2:
877 if (bswap) {
878 tcg_out_modrm(s, 0x8b, r1, data_reg); /* movl */
879 /* bswap data_reg */
880 tcg_out_opc(s, (0xc8 + r1) | P_EXT, 0, r1, 0);
881 data_reg = r1;
882 }
883 /* movl */
884 tcg_out_modrm_offset(s, 0x89, data_reg, r0, offset);
885 break;
886 case 3:
887 if (bswap) {
888 tcg_out_mov(s, r1, data_reg);
889 /* bswap data_reg */
890 tcg_out_opc(s, (0xc8 + r1) | P_EXT | P_REXW, 0, r1, 0);
891 data_reg = r1;
892 }
893 /* movq */
894 tcg_out_modrm_offset(s, 0x89 | P_REXW, data_reg, r0, offset);
895 break;
896 default:
897 tcg_abort();
898 }
899
900 #if defined(CONFIG_SOFTMMU)
901 /* label2: */
902 *label2_ptr = s->code_ptr - label2_ptr - 1;
903 #endif
904 }
905
tcg_out_op(TCGContext * s,int opc,const TCGArg * args,const int * const_args)906 static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,
907 const int *const_args)
908 {
909 int c;
910
911 switch(opc) {
912 case INDEX_op_exit_tb:
913 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_RAX, args[0]);
914 tcg_out_goto(s, 0, tb_ret_addr);
915 break;
916 case INDEX_op_goto_tb:
917 if (s->tb_jmp_offset) {
918 /* direct jump method */
919 tcg_out8(s, 0xe9); /* jmp im */
920 s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;
921 tcg_out32(s, 0);
922 } else {
923 /* indirect jump method */
924 /* jmp Ev */
925 tcg_out_modrm_offset(s, 0xff, 4, -1,
926 (tcg_target_long)(s->tb_next +
927 args[0]));
928 }
929 s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
930 break;
931 case INDEX_op_call:
932 if (const_args[0]) {
933 tcg_out_goto(s, 1, (void *) args[0]);
934 } else {
935 tcg_out_modrm(s, 0xff, 2, args[0]);
936 }
937 break;
938 case INDEX_op_jmp:
939 if (const_args[0]) {
940 tcg_out_goto(s, 0, (void *) args[0]);
941 } else {
942 tcg_out_modrm(s, 0xff, 4, args[0]);
943 }
944 break;
945 case INDEX_op_br:
946 tcg_out_jxx(s, JCC_JMP, args[0]);
947 break;
948 case INDEX_op_movi_i32:
949 tcg_out_movi(s, TCG_TYPE_I32, args[0], (uint32_t)args[1]);
950 break;
951 case INDEX_op_movi_i64:
952 tcg_out_movi(s, TCG_TYPE_I64, args[0], args[1]);
953 break;
954 case INDEX_op_ld8u_i32:
955 case INDEX_op_ld8u_i64:
956 /* movzbl */
957 tcg_out_modrm_offset(s, 0xb6 | P_EXT, args[0], args[1], args[2]);
958 break;
959 case INDEX_op_ld8s_i32:
960 /* movsbl */
961 tcg_out_modrm_offset(s, 0xbe | P_EXT, args[0], args[1], args[2]);
962 break;
963 case INDEX_op_ld8s_i64:
964 /* movsbq */
965 tcg_out_modrm_offset(s, 0xbe | P_EXT | P_REXW, args[0], args[1], args[2]);
966 break;
967 case INDEX_op_ld16u_i32:
968 case INDEX_op_ld16u_i64:
969 /* movzwl */
970 tcg_out_modrm_offset(s, 0xb7 | P_EXT, args[0], args[1], args[2]);
971 break;
972 case INDEX_op_ld16s_i32:
973 /* movswl */
974 tcg_out_modrm_offset(s, 0xbf | P_EXT, args[0], args[1], args[2]);
975 break;
976 case INDEX_op_ld16s_i64:
977 /* movswq */
978 tcg_out_modrm_offset(s, 0xbf | P_EXT | P_REXW, args[0], args[1], args[2]);
979 break;
980 case INDEX_op_ld_i32:
981 case INDEX_op_ld32u_i64:
982 /* movl */
983 tcg_out_modrm_offset(s, 0x8b, args[0], args[1], args[2]);
984 break;
985 case INDEX_op_ld32s_i64:
986 /* movslq */
987 tcg_out_modrm_offset(s, 0x63 | P_REXW, args[0], args[1], args[2]);
988 break;
989 case INDEX_op_ld_i64:
990 /* movq */
991 tcg_out_modrm_offset(s, 0x8b | P_REXW, args[0], args[1], args[2]);
992 break;
993
994 case INDEX_op_st8_i32:
995 case INDEX_op_st8_i64:
996 /* movb */
997 tcg_out_modrm_offset(s, 0x88 | P_REXB_R, args[0], args[1], args[2]);
998 break;
999 case INDEX_op_st16_i32:
1000 case INDEX_op_st16_i64:
1001 /* movw */
1002 tcg_out8(s, 0x66);
1003 tcg_out_modrm_offset(s, 0x89, args[0], args[1], args[2]);
1004 break;
1005 case INDEX_op_st_i32:
1006 case INDEX_op_st32_i64:
1007 /* movl */
1008 tcg_out_modrm_offset(s, 0x89, args[0], args[1], args[2]);
1009 break;
1010 case INDEX_op_st_i64:
1011 /* movq */
1012 tcg_out_modrm_offset(s, 0x89 | P_REXW, args[0], args[1], args[2]);
1013 break;
1014
1015 case INDEX_op_sub_i32:
1016 c = ARITH_SUB;
1017 goto gen_arith32;
1018 case INDEX_op_and_i32:
1019 c = ARITH_AND;
1020 goto gen_arith32;
1021 case INDEX_op_or_i32:
1022 c = ARITH_OR;
1023 goto gen_arith32;
1024 case INDEX_op_xor_i32:
1025 c = ARITH_XOR;
1026 goto gen_arith32;
1027 case INDEX_op_add_i32:
1028 c = ARITH_ADD;
1029 gen_arith32:
1030 if (const_args[2]) {
1031 tgen_arithi32(s, c, args[0], args[2]);
1032 } else {
1033 tcg_out_modrm(s, 0x01 | (c << 3), args[2], args[0]);
1034 }
1035 break;
1036
1037 case INDEX_op_sub_i64:
1038 c = ARITH_SUB;
1039 goto gen_arith64;
1040 case INDEX_op_and_i64:
1041 c = ARITH_AND;
1042 goto gen_arith64;
1043 case INDEX_op_or_i64:
1044 c = ARITH_OR;
1045 goto gen_arith64;
1046 case INDEX_op_xor_i64:
1047 c = ARITH_XOR;
1048 goto gen_arith64;
1049 case INDEX_op_add_i64:
1050 c = ARITH_ADD;
1051 gen_arith64:
1052 if (const_args[2]) {
1053 tgen_arithi64(s, c, args[0], args[2]);
1054 } else {
1055 tcg_out_modrm(s, 0x01 | (c << 3) | P_REXW, args[2], args[0]);
1056 }
1057 break;
1058
1059 case INDEX_op_mul_i32:
1060 if (const_args[2]) {
1061 int32_t val;
1062 val = args[2];
1063 if (val == (int8_t)val) {
1064 tcg_out_modrm(s, 0x6b, args[0], args[0]);
1065 tcg_out8(s, val);
1066 } else {
1067 tcg_out_modrm(s, 0x69, args[0], args[0]);
1068 tcg_out32(s, val);
1069 }
1070 } else {
1071 tcg_out_modrm(s, 0xaf | P_EXT, args[0], args[2]);
1072 }
1073 break;
1074 case INDEX_op_mul_i64:
1075 if (const_args[2]) {
1076 int32_t val;
1077 val = args[2];
1078 if (val == (int8_t)val) {
1079 tcg_out_modrm(s, 0x6b | P_REXW, args[0], args[0]);
1080 tcg_out8(s, val);
1081 } else {
1082 tcg_out_modrm(s, 0x69 | P_REXW, args[0], args[0]);
1083 tcg_out32(s, val);
1084 }
1085 } else {
1086 tcg_out_modrm(s, 0xaf | P_EXT | P_REXW, args[0], args[2]);
1087 }
1088 break;
1089 case INDEX_op_div2_i32:
1090 tcg_out_modrm(s, 0xf7, 7, args[4]);
1091 break;
1092 case INDEX_op_divu2_i32:
1093 tcg_out_modrm(s, 0xf7, 6, args[4]);
1094 break;
1095 case INDEX_op_div2_i64:
1096 tcg_out_modrm(s, 0xf7 | P_REXW, 7, args[4]);
1097 break;
1098 case INDEX_op_divu2_i64:
1099 tcg_out_modrm(s, 0xf7 | P_REXW, 6, args[4]);
1100 break;
1101
1102 case INDEX_op_shl_i32:
1103 c = SHIFT_SHL;
1104 gen_shift32:
1105 if (const_args[2]) {
1106 if (args[2] == 1) {
1107 tcg_out_modrm(s, 0xd1, c, args[0]);
1108 } else {
1109 tcg_out_modrm(s, 0xc1, c, args[0]);
1110 tcg_out8(s, args[2]);
1111 }
1112 } else {
1113 tcg_out_modrm(s, 0xd3, c, args[0]);
1114 }
1115 break;
1116 case INDEX_op_shr_i32:
1117 c = SHIFT_SHR;
1118 goto gen_shift32;
1119 case INDEX_op_sar_i32:
1120 c = SHIFT_SAR;
1121 goto gen_shift32;
1122 case INDEX_op_rotl_i32:
1123 c = SHIFT_ROL;
1124 goto gen_shift32;
1125 case INDEX_op_rotr_i32:
1126 c = SHIFT_ROR;
1127 goto gen_shift32;
1128
1129 case INDEX_op_shl_i64:
1130 c = SHIFT_SHL;
1131 gen_shift64:
1132 if (const_args[2]) {
1133 if (args[2] == 1) {
1134 tcg_out_modrm(s, 0xd1 | P_REXW, c, args[0]);
1135 } else {
1136 tcg_out_modrm(s, 0xc1 | P_REXW, c, args[0]);
1137 tcg_out8(s, args[2]);
1138 }
1139 } else {
1140 tcg_out_modrm(s, 0xd3 | P_REXW, c, args[0]);
1141 }
1142 break;
1143 case INDEX_op_shr_i64:
1144 c = SHIFT_SHR;
1145 goto gen_shift64;
1146 case INDEX_op_sar_i64:
1147 c = SHIFT_SAR;
1148 goto gen_shift64;
1149 case INDEX_op_rotl_i64:
1150 c = SHIFT_ROL;
1151 goto gen_shift64;
1152 case INDEX_op_rotr_i64:
1153 c = SHIFT_ROR;
1154 goto gen_shift64;
1155
1156 case INDEX_op_brcond_i32:
1157 tcg_out_brcond(s, args[2], args[0], args[1], const_args[1],
1158 args[3], 0);
1159 break;
1160 case INDEX_op_brcond_i64:
1161 tcg_out_brcond(s, args[2], args[0], args[1], const_args[1],
1162 args[3], P_REXW);
1163 break;
1164
1165 case INDEX_op_bswap16_i32:
1166 case INDEX_op_bswap16_i64:
1167 tcg_out8(s, 0x66);
1168 tcg_out_modrm(s, 0xc1, SHIFT_ROL, args[0]);
1169 tcg_out8(s, 8);
1170 break;
1171 case INDEX_op_bswap32_i32:
1172 case INDEX_op_bswap32_i64:
1173 tcg_out_opc(s, (0xc8 + (args[0] & 7)) | P_EXT, 0, args[0], 0);
1174 break;
1175 case INDEX_op_bswap64_i64:
1176 tcg_out_opc(s, (0xc8 + (args[0] & 7)) | P_EXT | P_REXW, 0, args[0], 0);
1177 break;
1178
1179 case INDEX_op_neg_i32:
1180 tcg_out_modrm(s, 0xf7, 3, args[0]);
1181 break;
1182 case INDEX_op_neg_i64:
1183 tcg_out_modrm(s, 0xf7 | P_REXW, 3, args[0]);
1184 break;
1185
1186 case INDEX_op_not_i32:
1187 tcg_out_modrm(s, 0xf7, 2, args[0]);
1188 break;
1189 case INDEX_op_not_i64:
1190 tcg_out_modrm(s, 0xf7 | P_REXW, 2, args[0]);
1191 break;
1192
1193 case INDEX_op_ext8s_i32:
1194 tcg_out_modrm(s, 0xbe | P_EXT | P_REXB_RM, args[0], args[1]);
1195 break;
1196 case INDEX_op_ext16s_i32:
1197 tcg_out_modrm(s, 0xbf | P_EXT, args[0], args[1]);
1198 break;
1199 case INDEX_op_ext8s_i64:
1200 tcg_out_modrm(s, 0xbe | P_EXT | P_REXW, args[0], args[1]);
1201 break;
1202 case INDEX_op_ext16s_i64:
1203 tcg_out_modrm(s, 0xbf | P_EXT | P_REXW, args[0], args[1]);
1204 break;
1205 case INDEX_op_ext32s_i64:
1206 tcg_out_modrm(s, 0x63 | P_REXW, args[0], args[1]);
1207 break;
1208 case INDEX_op_ext8u_i32:
1209 case INDEX_op_ext8u_i64:
1210 tcg_out_modrm(s, 0xb6 | P_EXT | P_REXB_RM, args[0], args[1]);
1211 break;
1212 case INDEX_op_ext16u_i32:
1213 case INDEX_op_ext16u_i64:
1214 tcg_out_modrm(s, 0xb7 | P_EXT, args[0], args[1]);
1215 break;
1216 case INDEX_op_ext32u_i64:
1217 tcg_out_modrm(s, 0x8b, args[0], args[1]);
1218 break;
1219
1220 case INDEX_op_setcond_i32:
1221 tcg_out_setcond(s, args[3], args[0], args[1], args[2],
1222 const_args[2], 0);
1223 break;
1224 case INDEX_op_setcond_i64:
1225 tcg_out_setcond(s, args[3], args[0], args[1], args[2],
1226 const_args[2], P_REXW);
1227 break;
1228
1229 case INDEX_op_qemu_ld8u:
1230 tcg_out_qemu_ld(s, args, 0);
1231 break;
1232 case INDEX_op_qemu_ld8s:
1233 tcg_out_qemu_ld(s, args, 0 | 4);
1234 break;
1235 case INDEX_op_qemu_ld16u:
1236 tcg_out_qemu_ld(s, args, 1);
1237 break;
1238 case INDEX_op_qemu_ld16s:
1239 tcg_out_qemu_ld(s, args, 1 | 4);
1240 break;
1241 case INDEX_op_qemu_ld32u:
1242 tcg_out_qemu_ld(s, args, 2);
1243 break;
1244 case INDEX_op_qemu_ld32s:
1245 tcg_out_qemu_ld(s, args, 2 | 4);
1246 break;
1247 case INDEX_op_qemu_ld64:
1248 tcg_out_qemu_ld(s, args, 3);
1249 break;
1250
1251 case INDEX_op_qemu_st8:
1252 tcg_out_qemu_st(s, args, 0);
1253 break;
1254 case INDEX_op_qemu_st16:
1255 tcg_out_qemu_st(s, args, 1);
1256 break;
1257 case INDEX_op_qemu_st32:
1258 tcg_out_qemu_st(s, args, 2);
1259 break;
1260 case INDEX_op_qemu_st64:
1261 tcg_out_qemu_st(s, args, 3);
1262 break;
1263
1264 default:
1265 tcg_abort();
1266 }
1267 }
1268
1269 static int tcg_target_callee_save_regs[] = {
1270 TCG_REG_RBP,
1271 TCG_REG_RBX,
1272 TCG_REG_R12,
1273 TCG_REG_R13,
1274 /* TCG_REG_R14, */ /* currently used for the global env, so no
1275 need to save */
1276 TCG_REG_R15,
1277 };
1278
tcg_out_push(TCGContext * s,int reg)1279 static inline void tcg_out_push(TCGContext *s, int reg)
1280 {
1281 tcg_out_opc(s, (0x50 + (reg & 7)), 0, reg, 0);
1282 }
1283
tcg_out_pop(TCGContext * s,int reg)1284 static inline void tcg_out_pop(TCGContext *s, int reg)
1285 {
1286 tcg_out_opc(s, (0x58 + (reg & 7)), 0, reg, 0);
1287 }
1288
1289 /* Generate global QEMU prologue and epilogue code */
tcg_target_qemu_prologue(TCGContext * s)1290 void tcg_target_qemu_prologue(TCGContext *s)
1291 {
1292 int i, frame_size, push_size, stack_addend;
1293
1294 /* TB prologue */
1295 /* save all callee saved registers */
1296 for(i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
1297 tcg_out_push(s, tcg_target_callee_save_regs[i]);
1298
1299 }
1300 /* reserve some stack space */
1301 push_size = 8 + ARRAY_SIZE(tcg_target_callee_save_regs) * 8;
1302 frame_size = push_size + TCG_STATIC_CALL_ARGS_SIZE;
1303 frame_size = (frame_size + TCG_TARGET_STACK_ALIGN - 1) &
1304 ~(TCG_TARGET_STACK_ALIGN - 1);
1305 stack_addend = frame_size - push_size;
1306 tcg_out_addi(s, TCG_REG_RSP, -stack_addend);
1307
1308 tcg_out_modrm(s, 0xff, 4, TCG_REG_RDI); /* jmp *%rdi */
1309
1310 /* TB epilogue */
1311 tb_ret_addr = s->code_ptr;
1312 tcg_out_addi(s, TCG_REG_RSP, stack_addend);
1313 for(i = ARRAY_SIZE(tcg_target_callee_save_regs) - 1; i >= 0; i--) {
1314 tcg_out_pop(s, tcg_target_callee_save_regs[i]);
1315 }
1316 tcg_out8(s, 0xc3); /* ret */
1317 }
1318
1319 static const TCGTargetOpDef x86_64_op_defs[] = {
1320 { INDEX_op_exit_tb, { } },
1321 { INDEX_op_goto_tb, { } },
1322 { INDEX_op_call, { "ri" } }, /* XXX: might need a specific constant constraint */
1323 { INDEX_op_jmp, { "ri" } }, /* XXX: might need a specific constant constraint */
1324 { INDEX_op_br, { } },
1325
1326 { INDEX_op_mov_i32, { "r", "r" } },
1327 { INDEX_op_movi_i32, { "r" } },
1328 { INDEX_op_ld8u_i32, { "r", "r" } },
1329 { INDEX_op_ld8s_i32, { "r", "r" } },
1330 { INDEX_op_ld16u_i32, { "r", "r" } },
1331 { INDEX_op_ld16s_i32, { "r", "r" } },
1332 { INDEX_op_ld_i32, { "r", "r" } },
1333 { INDEX_op_st8_i32, { "r", "r" } },
1334 { INDEX_op_st16_i32, { "r", "r" } },
1335 { INDEX_op_st_i32, { "r", "r" } },
1336
1337 { INDEX_op_add_i32, { "r", "0", "ri" } },
1338 { INDEX_op_mul_i32, { "r", "0", "ri" } },
1339 { INDEX_op_div2_i32, { "a", "d", "0", "1", "r" } },
1340 { INDEX_op_divu2_i32, { "a", "d", "0", "1", "r" } },
1341 { INDEX_op_sub_i32, { "r", "0", "ri" } },
1342 { INDEX_op_and_i32, { "r", "0", "ri" } },
1343 { INDEX_op_or_i32, { "r", "0", "ri" } },
1344 { INDEX_op_xor_i32, { "r", "0", "ri" } },
1345
1346 { INDEX_op_shl_i32, { "r", "0", "ci" } },
1347 { INDEX_op_shr_i32, { "r", "0", "ci" } },
1348 { INDEX_op_sar_i32, { "r", "0", "ci" } },
1349 { INDEX_op_rotl_i32, { "r", "0", "ci" } },
1350 { INDEX_op_rotr_i32, { "r", "0", "ci" } },
1351
1352 { INDEX_op_brcond_i32, { "r", "ri" } },
1353
1354 { INDEX_op_mov_i64, { "r", "r" } },
1355 { INDEX_op_movi_i64, { "r" } },
1356 { INDEX_op_ld8u_i64, { "r", "r" } },
1357 { INDEX_op_ld8s_i64, { "r", "r" } },
1358 { INDEX_op_ld16u_i64, { "r", "r" } },
1359 { INDEX_op_ld16s_i64, { "r", "r" } },
1360 { INDEX_op_ld32u_i64, { "r", "r" } },
1361 { INDEX_op_ld32s_i64, { "r", "r" } },
1362 { INDEX_op_ld_i64, { "r", "r" } },
1363 { INDEX_op_st8_i64, { "r", "r" } },
1364 { INDEX_op_st16_i64, { "r", "r" } },
1365 { INDEX_op_st32_i64, { "r", "r" } },
1366 { INDEX_op_st_i64, { "r", "r" } },
1367
1368 { INDEX_op_add_i64, { "r", "0", "re" } },
1369 { INDEX_op_mul_i64, { "r", "0", "re" } },
1370 { INDEX_op_div2_i64, { "a", "d", "0", "1", "r" } },
1371 { INDEX_op_divu2_i64, { "a", "d", "0", "1", "r" } },
1372 { INDEX_op_sub_i64, { "r", "0", "re" } },
1373 { INDEX_op_and_i64, { "r", "0", "reZ" } },
1374 { INDEX_op_or_i64, { "r", "0", "re" } },
1375 { INDEX_op_xor_i64, { "r", "0", "re" } },
1376
1377 { INDEX_op_shl_i64, { "r", "0", "ci" } },
1378 { INDEX_op_shr_i64, { "r", "0", "ci" } },
1379 { INDEX_op_sar_i64, { "r", "0", "ci" } },
1380 { INDEX_op_rotl_i64, { "r", "0", "ci" } },
1381 { INDEX_op_rotr_i64, { "r", "0", "ci" } },
1382
1383 { INDEX_op_brcond_i64, { "r", "re" } },
1384
1385 { INDEX_op_bswap16_i32, { "r", "0" } },
1386 { INDEX_op_bswap16_i64, { "r", "0" } },
1387 { INDEX_op_bswap32_i32, { "r", "0" } },
1388 { INDEX_op_bswap32_i64, { "r", "0" } },
1389 { INDEX_op_bswap64_i64, { "r", "0" } },
1390
1391 { INDEX_op_neg_i32, { "r", "0" } },
1392 { INDEX_op_neg_i64, { "r", "0" } },
1393
1394 { INDEX_op_not_i32, { "r", "0" } },
1395 { INDEX_op_not_i64, { "r", "0" } },
1396
1397 { INDEX_op_ext8s_i32, { "r", "r"} },
1398 { INDEX_op_ext16s_i32, { "r", "r"} },
1399 { INDEX_op_ext8s_i64, { "r", "r"} },
1400 { INDEX_op_ext16s_i64, { "r", "r"} },
1401 { INDEX_op_ext32s_i64, { "r", "r"} },
1402 { INDEX_op_ext8u_i32, { "r", "r"} },
1403 { INDEX_op_ext16u_i32, { "r", "r"} },
1404 { INDEX_op_ext8u_i64, { "r", "r"} },
1405 { INDEX_op_ext16u_i64, { "r", "r"} },
1406 { INDEX_op_ext32u_i64, { "r", "r"} },
1407
1408 { INDEX_op_setcond_i32, { "r", "r", "ri" } },
1409 { INDEX_op_setcond_i64, { "r", "r", "re" } },
1410
1411 { INDEX_op_qemu_ld8u, { "r", "L" } },
1412 { INDEX_op_qemu_ld8s, { "r", "L" } },
1413 { INDEX_op_qemu_ld16u, { "r", "L" } },
1414 { INDEX_op_qemu_ld16s, { "r", "L" } },
1415 { INDEX_op_qemu_ld32u, { "r", "L" } },
1416 { INDEX_op_qemu_ld32s, { "r", "L" } },
1417 { INDEX_op_qemu_ld64, { "r", "L" } },
1418
1419 { INDEX_op_qemu_st8, { "L", "L" } },
1420 { INDEX_op_qemu_st16, { "L", "L" } },
1421 { INDEX_op_qemu_st32, { "L", "L" } },
1422 { INDEX_op_qemu_st64, { "L", "L" } },
1423
1424 { -1 },
1425 };
1426
tcg_target_init(TCGContext * s)1427 void tcg_target_init(TCGContext *s)
1428 {
1429 /* fail safe */
1430 if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry))
1431 tcg_abort();
1432
1433 tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffff);
1434 tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffff);
1435 tcg_regset_set32(tcg_target_call_clobber_regs, 0,
1436 (1 << TCG_REG_RDI) |
1437 (1 << TCG_REG_RSI) |
1438 (1 << TCG_REG_RDX) |
1439 (1 << TCG_REG_RCX) |
1440 (1 << TCG_REG_R8) |
1441 (1 << TCG_REG_R9) |
1442 (1 << TCG_REG_RAX) |
1443 (1 << TCG_REG_R10) |
1444 (1 << TCG_REG_R11));
1445
1446 tcg_regset_clear(s->reserved_regs);
1447 tcg_regset_set_reg(s->reserved_regs, TCG_REG_RSP);
1448
1449 tcg_add_target_add_op_defs(x86_64_op_defs);
1450 }
1451