| blob | a3debf6da793645b874c5f3a2eda0026bc3a8901 |
1 /*
2 * Tiny Code Generator for QEMU
3 *
4 * Copyright (c) 2021 WANG Xuerui <git@xen0n.name>
5 *
6 * Based on tcg/riscv/tcg-target.c.inc
7 *
8 * Copyright (c) 2018 SiFive, Inc
9 * Copyright (c) 2008-2009 Arnaud Patard <arnaud.patard@rtp-net.org>
10 * Copyright (c) 2009 Aurelien Jarno <aurelien@aurel32.net>
11 * Copyright (c) 2008 Fabrice Bellard
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining a copy
14 * of this software and associated documentation files (the "Software"), to deal
15 * in the Software without restriction, including without limitation the rights
16 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
17 * copies of the Software, and to permit persons to whom the Software is
18 * furnished to do so, subject to the following conditions:
19 *
20 * The above copyright notice and this permission notice shall be included in
21 * all copies or substantial portions of the Software.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
26 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
27 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
28 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
29 * THE SOFTWARE.
30 */
32 #include "../tcg-ldst.c.inc"
34 #ifdef CONFIG_DEBUG_TCG
35 static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
36 "zero",
37 "ra",
38 "tp",
39 "sp",
40 "a0",
41 "a1",
42 "a2",
43 "a3",
44 "a4",
45 "a5",
46 "a6",
47 "a7",
48 "t0",
49 "t1",
50 "t2",
51 "t3",
52 "t4",
53 "t5",
54 "t6",
55 "t7",
56 "t8",
57 "r21", /* reserved in the LP64* ABI, hence no ABI name */
58 "s9",
59 "s0",
60 "s1",
61 "s2",
62 "s3",
63 "s4",
64 "s5",
65 "s6",
66 "s7",
67 "s8"
68 };
69 #endif
71 static const int tcg_target_reg_alloc_order[] = {
72 /* Registers preserved across calls */
73 /* TCG_REG_S0 reserved for TCG_AREG0 */
74 TCG_REG_S1,
75 TCG_REG_S2,
76 TCG_REG_S3,
77 TCG_REG_S4,
78 TCG_REG_S5,
79 TCG_REG_S6,
80 TCG_REG_S7,
81 TCG_REG_S8,
82 TCG_REG_S9,
84 /* Registers (potentially) clobbered across calls */
85 TCG_REG_T0,
86 TCG_REG_T1,
87 TCG_REG_T2,
88 TCG_REG_T3,
89 TCG_REG_T4,
90 TCG_REG_T5,
91 TCG_REG_T6,
92 TCG_REG_T7,
93 TCG_REG_T8,
95 /* Argument registers, opposite order of allocation. */
96 TCG_REG_A7,
97 TCG_REG_A6,
98 TCG_REG_A5,
99 TCG_REG_A4,
100 TCG_REG_A3,
101 TCG_REG_A2,
102 TCG_REG_A1,
103 TCG_REG_A0,
104 };
106 static const int tcg_target_call_iarg_regs[] = {
107 TCG_REG_A0,
108 TCG_REG_A1,
109 TCG_REG_A2,
110 TCG_REG_A3,
111 TCG_REG_A4,
112 TCG_REG_A5,
113 TCG_REG_A6,
114 TCG_REG_A7,
115 };
117 static const int tcg_target_call_oarg_regs[] = {
118 TCG_REG_A0,
119 TCG_REG_A1,
120 };
122 #ifndef CONFIG_SOFTMMU
123 #define USE_GUEST_BASE (guest_base != 0)
124 #define TCG_GUEST_BASE_REG TCG_REG_S1
125 #endif
127 #define TCG_CT_CONST_ZERO 0x100
128 #define TCG_CT_CONST_S12 0x200
129 #define TCG_CT_CONST_N12 0x400
130 #define TCG_CT_CONST_U12 0x800
131 #define TCG_CT_CONST_C12 0x1000
132 #define TCG_CT_CONST_WSZ 0x2000
134 #define ALL_GENERAL_REGS MAKE_64BIT_MASK(0, 32)
135 /*
136 * For softmmu, we need to avoid conflicts with the first 5
137 * argument registers to call the helper. Some of these are
138 * also used for the tlb lookup.
139 */
140 #ifdef CONFIG_SOFTMMU
141 #define SOFTMMU_RESERVE_REGS MAKE_64BIT_MASK(TCG_REG_A0, 5)
142 #else
143 #define SOFTMMU_RESERVE_REGS 0
144 #endif
147 static inline tcg_target_long sextreg(tcg_target_long val, int pos, int len)
148 {
149 return sextract64(val, pos, len);
150 }
152 /* test if a constant matches the constraint */
153 static bool tcg_target_const_match(int64_t val, TCGType type, int ct)
154 {
155 if (ct & TCG_CT_CONST) {
156 return true;
157 }
158 if ((ct & TCG_CT_CONST_ZERO) && val == 0) {
159 return true;
160 }
161 if ((ct & TCG_CT_CONST_S12) && val == sextreg(val, 0, 12)) {
162 return true;
163 }
164 if ((ct & TCG_CT_CONST_N12) && -val == sextreg(-val, 0, 12)) {
165 return true;
166 }
167 if ((ct & TCG_CT_CONST_U12) && val >= 0 && val <= 0xfff) {
168 return true;
169 }
170 if ((ct & TCG_CT_CONST_C12) && ~val >= 0 && ~val <= 0xfff) {
171 return true;
172 }
173 if ((ct & TCG_CT_CONST_WSZ) && val == (type == TCG_TYPE_I32 ? 32 : 64)) {
174 return true;
175 }
176 return false;
177 }
179 /*
180 * Relocations
181 */
183 /*
184 * Relocation records defined in LoongArch ELF psABI v1.00 is way too
185 * complicated; a whopping stack machine is needed to stuff the fields, at
186 * the very least one SOP_PUSH and one SOP_POP (of the correct format) are
187 * needed.
188 *
189 * Hence, define our own simpler relocation types. Numbers are chosen as to
190 * not collide with potential future additions to the true ELF relocation
191 * type enum.
192 */
194 /* Field Sk16, shifted right by 2; suitable for conditional jumps */
195 #define R_LOONGARCH_BR_SK16 256
196 /* Field Sd10k16, shifted right by 2; suitable for B and BL */
197 #define R_LOONGARCH_BR_SD10K16 257
199 static bool reloc_br_sk16(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
200 {
201 const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
202 intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
204 tcg_debug_assert((offset & 3) == 0);
205 offset >>= 2;
206 if (offset == sextreg(offset, 0, 16)) {
207 *src_rw = deposit64(*src_rw, 10, 16, offset);
208 return true;
209 }
211 return false;
212 }
214 static bool reloc_br_sd10k16(tcg_insn_unit *src_rw,
215 const tcg_insn_unit *target)
216 {
217 const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
218 intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
220 tcg_debug_assert((offset & 3) == 0);
221 offset >>= 2;
222 if (offset == sextreg(offset, 0, 26)) {
223 *src_rw = deposit64(*src_rw, 0, 10, offset >> 16); /* slot d10 */
224 *src_rw = deposit64(*src_rw, 10, 16, offset); /* slot k16 */
225 return true;
226 }
228 return false;
229 }
231 static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
232 intptr_t value, intptr_t addend)
233 {
234 tcg_debug_assert(addend == 0);
235 switch (type) {
236 case R_LOONGARCH_BR_SK16:
237 return reloc_br_sk16(code_ptr, (tcg_insn_unit *)value);
238 case R_LOONGARCH_BR_SD10K16:
239 return reloc_br_sd10k16(code_ptr, (tcg_insn_unit *)value);
240 default:
241 g_assert_not_reached();
242 }
243 }
245 #include "tcg-insn-defs.c.inc"
247 /*
248 * TCG intrinsics
249 */
251 static void tcg_out_mb(TCGContext *s, TCGArg a0)
252 {
253 /* Baseline LoongArch only has the full barrier, unfortunately. */
254 tcg_out_opc_dbar(s, 0);
255 }
257 static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg)
258 {
259 if (ret == arg) {
260 return true;
261 }
262 switch (type) {
263 case TCG_TYPE_I32:
264 case TCG_TYPE_I64:
265 /*
266 * Conventional register-register move used in LoongArch is
267 * `or dst, src, zero`.
268 */
269 tcg_out_opc_or(s, ret, arg, TCG_REG_ZERO);
270 break;
271 default:
272 g_assert_not_reached();
273 }
274 return true;
275 }
277 static bool imm_part_needs_loading(bool high_bits_are_ones,
278 tcg_target_long part)
279 {
280 if (high_bits_are_ones) {
281 return part != -1;
282 } else {
283 return part != 0;
284 }
285 }
287 /* Loads a 32-bit immediate into rd, sign-extended. */
288 static void tcg_out_movi_i32(TCGContext *s, TCGReg rd, int32_t val)
289 {
290 tcg_target_long lo = sextreg(val, 0, 12);
291 tcg_target_long hi12 = sextreg(val, 12, 20);
293 /* Single-instruction cases. */
294 if (lo == val) {
295 /* val fits in simm12: addi.w rd, zero, val */
296 tcg_out_opc_addi_w(s, rd, TCG_REG_ZERO, val);
297 return;
298 }
299 if (0x800 <= val && val <= 0xfff) {
300 /* val fits in uimm12: ori rd, zero, val */
301 tcg_out_opc_ori(s, rd, TCG_REG_ZERO, val);
302 return;
303 }
305 /* High bits must be set; load with lu12i.w + optional ori. */
306 tcg_out_opc_lu12i_w(s, rd, hi12);
307 if (lo != 0) {
308 tcg_out_opc_ori(s, rd, rd, lo & 0xfff);
309 }
310 }
312 static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd,
313 tcg_target_long val)
314 {
315 /*
316 * LoongArch conventionally loads 64-bit immediates in at most 4 steps,
317 * with dedicated instructions for filling the respective bitfields
318 * below:
319 *
320 * 6 5 4 3
321 * 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2
322 * +-----------------------+---------------------------------------+...
323 * | hi52 | hi32 |
324 * +-----------------------+---------------------------------------+...
325 * 3 2 1
326 * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
327 * ...+-------------------------------------+-------------------------+
328 * | hi12 | lo |
329 * ...+-------------------------------------+-------------------------+
330 *
331 * Check if val belong to one of the several fast cases, before falling
332 * back to the slow path.
333 */
335 intptr_t pc_offset;
336 tcg_target_long val_lo, val_hi, pc_hi, offset_hi;
337 tcg_target_long hi32, hi52;
338 bool rd_high_bits_are_ones;
340 /* Value fits in signed i32. */
341 if (type == TCG_TYPE_I32 || val == (int32_t)val) {
342 tcg_out_movi_i32(s, rd, val);
343 return;
344 }
346 /* PC-relative cases. */
347 pc_offset = tcg_pcrel_diff(s, (void *)val);
348 if (pc_offset == sextreg(pc_offset, 0, 22) && (pc_offset & 3) == 0) {
349 /* Single pcaddu2i. */
350 tcg_out_opc_pcaddu2i(s, rd, pc_offset >> 2);
351 return;
352 }
354 if (pc_offset == (int32_t)pc_offset) {
355 /* Offset within 32 bits; load with pcalau12i + ori. */
356 val_lo = sextreg(val, 0, 12);
357 val_hi = val >> 12;
358 pc_hi = (val - pc_offset) >> 12;
359 offset_hi = val_hi - pc_hi;
361 tcg_debug_assert(offset_hi == sextreg(offset_hi, 0, 20));
362 tcg_out_opc_pcalau12i(s, rd, offset_hi);
363 if (val_lo != 0) {
364 tcg_out_opc_ori(s, rd, rd, val_lo & 0xfff);
365 }
366 return;
367 }
369 hi32 = sextreg(val, 32, 20);
370 hi52 = sextreg(val, 52, 12);
372 /* Single cu52i.d case. */
373 if (ctz64(val) >= 52) {
374 tcg_out_opc_cu52i_d(s, rd, TCG_REG_ZERO, hi52);
375 return;
376 }
378 /* Slow path. Initialize the low 32 bits, then concat high bits. */
379 tcg_out_movi_i32(s, rd, val);
380 rd_high_bits_are_ones = (int32_t)val < 0;
382 if (imm_part_needs_loading(rd_high_bits_are_ones, hi32)) {
383 tcg_out_opc_cu32i_d(s, rd, hi32);
384 rd_high_bits_are_ones = hi32 < 0;
385 }
387 if (imm_part_needs_loading(rd_high_bits_are_ones, hi52)) {
388 tcg_out_opc_cu52i_d(s, rd, rd, hi52);
389 }
390 }
392 static void tcg_out_ext8u(TCGContext *s, TCGReg ret, TCGReg arg)
393 {
394 tcg_out_opc_andi(s, ret, arg, 0xff);
395 }
397 static void tcg_out_ext16u(TCGContext *s, TCGReg ret, TCGReg arg)
398 {
399 tcg_out_opc_bstrpick_w(s, ret, arg, 0, 15);
400 }
402 static void tcg_out_ext32u(TCGContext *s, TCGReg ret, TCGReg arg)
403 {
404 tcg_out_opc_bstrpick_d(s, ret, arg, 0, 31);
405 }
407 static void tcg_out_ext8s(TCGContext *s, TCGReg ret, TCGReg arg)
408 {
409 tcg_out_opc_sext_b(s, ret, arg);
410 }
412 static void tcg_out_ext16s(TCGContext *s, TCGReg ret, TCGReg arg)
413 {
414 tcg_out_opc_sext_h(s, ret, arg);
415 }
417 static void tcg_out_ext32s(TCGContext *s, TCGReg ret, TCGReg arg)
418 {
419 tcg_out_opc_addi_w(s, ret, arg, 0);
420 }
422 static void tcg_out_clzctz(TCGContext *s, LoongArchInsn opc,
423 TCGReg a0, TCGReg a1, TCGReg a2,
424 bool c2, bool is_32bit)
425 {
426 if (c2) {
427 /*
428 * Fast path: semantics already satisfied due to constraint and
429 * insn behavior, single instruction is enough.
430 */
431 tcg_debug_assert(a2 == (is_32bit ? 32 : 64));
432 /* all clz/ctz insns belong to DJ-format */
433 tcg_out32(s, encode_dj_insn(opc, a0, a1));
434 return;
435 }
437 tcg_out32(s, encode_dj_insn(opc, TCG_REG_TMP0, a1));
438 /* a0 = a1 ? REG_TMP0 : a2 */
439 tcg_out_opc_maskeqz(s, TCG_REG_TMP0, TCG_REG_TMP0, a1);
440 tcg_out_opc_masknez(s, a0, a2, a1);
441 tcg_out_opc_or(s, a0, TCG_REG_TMP0, a0);
442 }
444 static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret,
445 TCGReg arg1, TCGReg arg2, bool c2)
446 {
447 TCGReg tmp;
449 if (c2) {
450 tcg_debug_assert(arg2 == 0);
451 }
453 switch (cond) {
454 case TCG_COND_EQ:
455 if (c2) {
456 tmp = arg1;
457 } else {
458 tcg_out_opc_sub_d(s, ret, arg1, arg2);
459 tmp = ret;
460 }
461 tcg_out_opc_sltui(s, ret, tmp, 1);
462 break;
463 case TCG_COND_NE:
464 if (c2) {
465 tmp = arg1;
466 } else {
467 tcg_out_opc_sub_d(s, ret, arg1, arg2);
468 tmp = ret;
469 }
470 tcg_out_opc_sltu(s, ret, TCG_REG_ZERO, tmp);
471 break;
472 case TCG_COND_LT:
473 tcg_out_opc_slt(s, ret, arg1, arg2);
474 break;
475 case TCG_COND_GE:
476 tcg_out_opc_slt(s, ret, arg1, arg2);
477 tcg_out_opc_xori(s, ret, ret, 1);
478 break;
479 case TCG_COND_LE:
480 tcg_out_setcond(s, TCG_COND_GE, ret, arg2, arg1, false);
481 break;
482 case TCG_COND_GT:
483 tcg_out_setcond(s, TCG_COND_LT, ret, arg2, arg1, false);
484 break;
485 case TCG_COND_LTU:
486 tcg_out_opc_sltu(s, ret, arg1, arg2);
487 break;
488 case TCG_COND_GEU:
489 tcg_out_opc_sltu(s, ret, arg1, arg2);
490 tcg_out_opc_xori(s, ret, ret, 1);
491 break;
492 case TCG_COND_LEU:
493 tcg_out_setcond(s, TCG_COND_GEU, ret, arg2, arg1, false);
494 break;
495 case TCG_COND_GTU:
496 tcg_out_setcond(s, TCG_COND_LTU, ret, arg2, arg1, false);
497 break;
498 default:
499 g_assert_not_reached();
500 break;
501 }
502 }
504 /*
505 * Branch helpers
506 */
508 static const struct {
509 LoongArchInsn op;
510 bool swap;
511 } tcg_brcond_to_loongarch[] = {
512 [TCG_COND_EQ] = { OPC_BEQ, false },
513 [TCG_COND_NE] = { OPC_BNE, false },
514 [TCG_COND_LT] = { OPC_BGT, true },
515 [TCG_COND_GE] = { OPC_BLE, true },
516 [TCG_COND_LE] = { OPC_BLE, false },
517 [TCG_COND_GT] = { OPC_BGT, false },
518 [TCG_COND_LTU] = { OPC_BGTU, true },
519 [TCG_COND_GEU] = { OPC_BLEU, true },
520 [TCG_COND_LEU] = { OPC_BLEU, false },
521 [TCG_COND_GTU] = { OPC_BGTU, false }
522 };
524 static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1,
525 TCGReg arg2, TCGLabel *l)
526 {
527 LoongArchInsn op = tcg_brcond_to_loongarch[cond].op;
529 tcg_debug_assert(op != 0);
531 if (tcg_brcond_to_loongarch[cond].swap) {
532 TCGReg t = arg1;
533 arg1 = arg2;
534 arg2 = t;
535 }
537 /* all conditional branch insns belong to DJSk16-format */
538 tcg_out_reloc(s, s->code_ptr, R_LOONGARCH_BR_SK16, l, 0);
539 tcg_out32(s, encode_djsk16_insn(op, arg1, arg2, 0));
540 }
542 static void tcg_out_call_int(TCGContext *s, const tcg_insn_unit *arg, bool tail)
543 {
544 TCGReg link = tail ? TCG_REG_ZERO : TCG_REG_RA;
545 ptrdiff_t offset = tcg_pcrel_diff(s, arg);
547 tcg_debug_assert((offset & 3) == 0);
548 if (offset == sextreg(offset, 0, 28)) {
549 /* short jump: +/- 256MiB */
550 if (tail) {
551 tcg_out_opc_b(s, offset >> 2);
552 } else {
553 tcg_out_opc_bl(s, offset >> 2);
554 }
555 } else if (offset == sextreg(offset, 0, 38)) {
556 /* long jump: +/- 256GiB */
557 tcg_target_long lo = sextreg(offset, 0, 18);
558 tcg_target_long hi = offset - lo;
559 tcg_out_opc_pcaddu18i(s, TCG_REG_TMP0, hi >> 18);
560 tcg_out_opc_jirl(s, link, TCG_REG_TMP0, lo >> 2);
561 } else {
562 /* far jump: 64-bit */
563 tcg_target_long lo = sextreg((tcg_target_long)arg, 0, 18);
564 tcg_target_long hi = (tcg_target_long)arg - lo;
565 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP0, hi);
566 tcg_out_opc_jirl(s, link, TCG_REG_TMP0, lo >> 2);
567 }
568 }
570 static void tcg_out_call(TCGContext *s, const tcg_insn_unit *arg)
571 {
572 tcg_out_call_int(s, arg, false);
573 }
575 /*
576 * Load/store helpers
577 */
579 static void tcg_out_ldst(TCGContext *s, LoongArchInsn opc, TCGReg data,
580 TCGReg addr, intptr_t offset)
581 {
582 intptr_t imm12 = sextreg(offset, 0, 12);
584 if (offset != imm12) {
585 intptr_t diff = offset - (uintptr_t)s->code_ptr;
587 if (addr == TCG_REG_ZERO && diff == (int32_t)diff) {
588 imm12 = sextreg(diff, 0, 12);
589 tcg_out_opc_pcaddu12i(s, TCG_REG_TMP2, (diff - imm12) >> 12);
590 } else {
591 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP2, offset - imm12);
592 if (addr != TCG_REG_ZERO) {
593 tcg_out_opc_add_d(s, TCG_REG_TMP2, TCG_REG_TMP2, addr);
594 }
595 }
596 addr = TCG_REG_TMP2;
597 }
599 switch (opc) {
600 case OPC_LD_B:
601 case OPC_LD_BU:
602 case OPC_LD_H:
603 case OPC_LD_HU:
604 case OPC_LD_W:
605 case OPC_LD_WU:
606 case OPC_LD_D:
607 case OPC_ST_B:
608 case OPC_ST_H:
609 case OPC_ST_W:
610 case OPC_ST_D:
611 tcg_out32(s, encode_djsk12_insn(opc, data, addr, imm12));
612 break;
613 default:
614 g_assert_not_reached();
615 }
616 }
618 static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg,
619 TCGReg arg1, intptr_t arg2)
620 {
621 bool is_32bit = type == TCG_TYPE_I32;
622 tcg_out_ldst(s, is_32bit ? OPC_LD_W : OPC_LD_D, arg, arg1, arg2);
623 }
625 static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg,
626 TCGReg arg1, intptr_t arg2)
627 {
628 bool is_32bit = type == TCG_TYPE_I32;
629 tcg_out_ldst(s, is_32bit ? OPC_ST_W : OPC_ST_D, arg, arg1, arg2);
630 }
632 static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val,
633 TCGReg base, intptr_t ofs)
634 {
635 if (val == 0) {
636 tcg_out_st(s, type, TCG_REG_ZERO, base, ofs);
637 return true;
638 }
639 return false;
640 }
642 /*
643 * Load/store helpers for SoftMMU, and qemu_ld/st implementations
644 */
646 #if defined(CONFIG_SOFTMMU)
647 /*
648 * helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr,
649 * MemOpIdx oi, uintptr_t ra)
650 */
651 static void * const qemu_ld_helpers[4] = {
652 [MO_8] = helper_ret_ldub_mmu,
653 [MO_16] = helper_le_lduw_mmu,
654 [MO_32] = helper_le_ldul_mmu,
655 [MO_64] = helper_le_ldq_mmu,
656 };
658 /*
659 * helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr,
660 * uintxx_t val, MemOpIdx oi,
661 * uintptr_t ra)
662 */
663 static void * const qemu_st_helpers[4] = {
664 [MO_8] = helper_ret_stb_mmu,
665 [MO_16] = helper_le_stw_mmu,
666 [MO_32] = helper_le_stl_mmu,
667 [MO_64] = helper_le_stq_mmu,
668 };
670 /* We expect to use a 12-bit negative offset from ENV. */
671 QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0);
672 QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -(1 << 11));
674 static bool tcg_out_goto(TCGContext *s, const tcg_insn_unit *target)
675 {
676 tcg_out_opc_b(s, 0);
677 return reloc_br_sd10k16(s->code_ptr - 1, target);
678 }
680 /*
681 * Emits common code for TLB addend lookup, that eventually loads the
682 * addend in TCG_REG_TMP2.
683 */
684 static void tcg_out_tlb_load(TCGContext *s, TCGReg addrl, MemOpIdx oi,
685 tcg_insn_unit **label_ptr, bool is_load)
686 {
687 MemOp opc = get_memop(oi);
688 unsigned s_bits = opc & MO_SIZE;
689 unsigned a_bits = get_alignment_bits(opc);
690 tcg_target_long compare_mask;
691 int mem_index = get_mmuidx(oi);
692 int fast_ofs = TLB_MASK_TABLE_OFS(mem_index);
693 int mask_ofs = fast_ofs + offsetof(CPUTLBDescFast, mask);
694 int table_ofs = fast_ofs + offsetof(CPUTLBDescFast, table);
696 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_AREG0, mask_ofs);
697 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP1, TCG_AREG0, table_ofs);
699 tcg_out_opc_srli_d(s, TCG_REG_TMP2, addrl,
700 TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
701 tcg_out_opc_and(s, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP0);
702 tcg_out_opc_add_d(s, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP1);
704 /* Load the tlb comparator and the addend. */
705 tcg_out_ld(s, TCG_TYPE_TL, TCG_REG_TMP0, TCG_REG_TMP2,
706 is_load ? offsetof(CPUTLBEntry, addr_read)
707 : offsetof(CPUTLBEntry, addr_write));
708 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP2, TCG_REG_TMP2,
709 offsetof(CPUTLBEntry, addend));
711 /* We don't support unaligned accesses. */
712 if (a_bits < s_bits) {
713 a_bits = s_bits;
714 }
715 /* Clear the non-page, non-alignment bits from the address. */
716 compare_mask = (tcg_target_long)TARGET_PAGE_MASK | ((1 << a_bits) - 1);
717 tcg_out_movi(s, TCG_TYPE_TL, TCG_REG_TMP1, compare_mask);
718 tcg_out_opc_and(s, TCG_REG_TMP1, TCG_REG_TMP1, addrl);
720 /* Compare masked address with the TLB entry. */
721 label_ptr[0] = s->code_ptr;
722 tcg_out_opc_bne(s, TCG_REG_TMP0, TCG_REG_TMP1, 0);
724 /* TLB Hit - addend in TCG_REG_TMP2, ready for use. */
725 }
727 static void add_qemu_ldst_label(TCGContext *s, int is_ld, MemOpIdx oi,
728 TCGType type,
729 TCGReg datalo, TCGReg addrlo,
730 void *raddr, tcg_insn_unit **label_ptr)
731 {
732 TCGLabelQemuLdst *label = new_ldst_label(s);
734 label->is_ld = is_ld;
735 label->oi = oi;
736 label->type = type;
737 label->datalo_reg = datalo;
738 label->datahi_reg = 0; /* unused */
739 label->addrlo_reg = addrlo;
740 label->addrhi_reg = 0; /* unused */
741 label->raddr = tcg_splitwx_to_rx(raddr);
742 label->label_ptr[0] = label_ptr[0];
743 }
745 static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
746 {
747 MemOpIdx oi = l->oi;
748 MemOp opc = get_memop(oi);
749 MemOp size = opc & MO_SIZE;
750 TCGType type = l->type;
752 /* resolve label address */
753 if (!reloc_br_sk16(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
754 return false;
755 }
757 /* call load helper */
758 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A0, TCG_AREG0);
759 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A1, l->addrlo_reg);
760 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A2, oi);
761 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A3, (tcg_target_long)l->raddr);
763 tcg_out_call(s, qemu_ld_helpers[size]);
765 switch (opc & MO_SSIZE) {
766 case MO_SB:
767 tcg_out_ext8s(s, l->datalo_reg, TCG_REG_A0);
768 break;
769 case MO_SW:
770 tcg_out_ext16s(s, l->datalo_reg, TCG_REG_A0);
771 break;
772 case MO_SL:
773 tcg_out_ext32s(s, l->datalo_reg, TCG_REG_A0);
774 break;
775 case MO_UL:
776 if (type == TCG_TYPE_I32) {
777 /* MO_UL loads of i32 should be sign-extended too */
778 tcg_out_ext32s(s, l->datalo_reg, TCG_REG_A0);
779 break;
780 }
781 /* fallthrough */
782 default:
783 tcg_out_mov(s, type, l->datalo_reg, TCG_REG_A0);
784 break;
785 }
787 return tcg_out_goto(s, l->raddr);
788 }
790 static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
791 {
792 MemOpIdx oi = l->oi;
793 MemOp opc = get_memop(oi);
794 MemOp size = opc & MO_SIZE;
796 /* resolve label address */
797 if (!reloc_br_sk16(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
798 return false;
799 }
801 /* call store helper */
802 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A0, TCG_AREG0);
803 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A1, l->addrlo_reg);
804 switch (size) {
805 case MO_8:
806 tcg_out_ext8u(s, TCG_REG_A2, l->datalo_reg);
807 break;
808 case MO_16:
809 tcg_out_ext16u(s, TCG_REG_A2, l->datalo_reg);
810 break;
811 case MO_32:
812 tcg_out_ext32u(s, TCG_REG_A2, l->datalo_reg);
813 break;
814 case MO_64:
815 tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_A2, l->datalo_reg);
816 break;
817 default:
818 g_assert_not_reached();
819 break;
820 }
821 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A3, oi);
822 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A4, (tcg_target_long)l->raddr);
824 tcg_out_call(s, qemu_st_helpers[size]);
826 return tcg_out_goto(s, l->raddr);
827 }
828 #else
830 /*
831 * Alignment helpers for user-mode emulation
832 */
834 static void tcg_out_test_alignment(TCGContext *s, bool is_ld, TCGReg addr_reg,
835 unsigned a_bits)
836 {
837 TCGLabelQemuLdst *l = new_ldst_label(s);
839 l->is_ld = is_ld;
840 l->addrlo_reg = addr_reg;
842 /*
843 * Without micro-architecture details, we don't know which of bstrpick or
844 * andi is faster, so use bstrpick as it's not constrained by imm field
845 * width. (Not to say alignments >= 2^12 are going to happen any time
846 * soon, though)
847 */
848 tcg_out_opc_bstrpick_d(s, TCG_REG_TMP1, addr_reg, 0, a_bits - 1);
850 l->label_ptr[0] = s->code_ptr;
851 tcg_out_opc_bne(s, TCG_REG_TMP1, TCG_REG_ZERO, 0);
853 l->raddr = tcg_splitwx_to_rx(s->code_ptr);
854 }
856 static bool tcg_out_fail_alignment(TCGContext *s, TCGLabelQemuLdst *l)
857 {
858 /* resolve label address */
859 if (!reloc_br_sk16(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
860 return false;
861 }
863 tcg_out_mov(s, TCG_TYPE_TL, TCG_REG_A1, l->addrlo_reg);
864 tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A0, TCG_AREG0);
866 /* tail call, with the return address back inline. */
867 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_RA, (uintptr_t)l->raddr);
868 tcg_out_call_int(s, (const void *)(l->is_ld ? helper_unaligned_ld
869 : helper_unaligned_st), true);
870 return true;
871 }
873 static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
874 {
875 return tcg_out_fail_alignment(s, l);
876 }
878 static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
879 {
880 return tcg_out_fail_alignment(s, l);
881 }
883 #endif /* CONFIG_SOFTMMU */
885 /*
886 * `ext32u` the address register into the temp register given,
887 * if target is 32-bit, no-op otherwise.
888 *
889 * Returns the address register ready for use with TLB addend.
890 */
891 static TCGReg tcg_out_zext_addr_if_32_bit(TCGContext *s,
892 TCGReg addr, TCGReg tmp)
893 {
894 if (TARGET_LONG_BITS == 32) {
895 tcg_out_ext32u(s, tmp, addr);
896 return tmp;
897 }
898 return addr;
899 }
901 static void tcg_out_qemu_ld_indexed(TCGContext *s, TCGReg rd, TCGReg rj,
902 TCGReg rk, MemOp opc, TCGType type)
903 {
904 /* Byte swapping is left to middle-end expansion. */
905 tcg_debug_assert((opc & MO_BSWAP) == 0);
907 switch (opc & MO_SSIZE) {
908 case MO_UB:
909 tcg_out_opc_ldx_bu(s, rd, rj, rk);
910 break;
911 case MO_SB:
912 tcg_out_opc_ldx_b(s, rd, rj, rk);
913 break;
914 case MO_UW:
915 tcg_out_opc_ldx_hu(s, rd, rj, rk);
916 break;
917 case MO_SW:
918 tcg_out_opc_ldx_h(s, rd, rj, rk);
919 break;
920 case MO_UL:
921 if (type == TCG_TYPE_I64) {
922 tcg_out_opc_ldx_wu(s, rd, rj, rk);
923 break;
924 }
925 /* fallthrough */
926 case MO_SL:
927 tcg_out_opc_ldx_w(s, rd, rj, rk);
928 break;
929 case MO_UQ:
930 tcg_out_opc_ldx_d(s, rd, rj, rk);
931 break;
932 default:
933 g_assert_not_reached();
934 }
935 }
937 static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, TCGType type)
938 {
939 TCGReg addr_regl;
940 TCGReg data_regl;
941 MemOpIdx oi;
942 MemOp opc;
943 #if defined(CONFIG_SOFTMMU)
944 tcg_insn_unit *label_ptr[1];
945 #else
946 unsigned a_bits;
947 #endif
948 TCGReg base;
950 data_regl = *args++;
951 addr_regl = *args++;
952 oi = *args++;
953 opc = get_memop(oi);
955 #if defined(CONFIG_SOFTMMU)
956 tcg_out_tlb_load(s, addr_regl, oi, label_ptr, 1);
957 base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0);
958 tcg_out_qemu_ld_indexed(s, data_regl, base, TCG_REG_TMP2, opc, type);
959 add_qemu_ldst_label(s, 1, oi, type,
960 data_regl, addr_regl,
961 s->code_ptr, label_ptr);
962 #else
963 a_bits = get_alignment_bits(opc);
964 if (a_bits) {
965 tcg_out_test_alignment(s, true, addr_regl, a_bits);
966 }
967 base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0);
968 TCGReg guest_base_reg = USE_GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_ZERO;
969 tcg_out_qemu_ld_indexed(s, data_regl, base, guest_base_reg, opc, type);
970 #endif
971 }
973 static void tcg_out_qemu_st_indexed(TCGContext *s, TCGReg data,
974 TCGReg rj, TCGReg rk, MemOp opc)
975 {
976 /* Byte swapping is left to middle-end expansion. */
977 tcg_debug_assert((opc & MO_BSWAP) == 0);
979 switch (opc & MO_SIZE) {
980 case MO_8:
981 tcg_out_opc_stx_b(s, data, rj, rk);
982 break;
983 case MO_16:
984 tcg_out_opc_stx_h(s, data, rj, rk);
985 break;
986 case MO_32:
987 tcg_out_opc_stx_w(s, data, rj, rk);
988 break;
989 case MO_64:
990 tcg_out_opc_stx_d(s, data, rj, rk);
991 break;
992 default:
993 g_assert_not_reached();
994 }
995 }
997 static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args)
998 {
999 TCGReg addr_regl;
1000 TCGReg data_regl;
1001 MemOpIdx oi;
1002 MemOp opc;
1003 #if defined(CONFIG_SOFTMMU)
1004 tcg_insn_unit *label_ptr[1];
1005 #else
1006 unsigned a_bits;
1007 #endif
1008 TCGReg base;
1010 data_regl = *args++;
1011 addr_regl = *args++;
1012 oi = *args++;
1013 opc = get_memop(oi);
1015 #if defined(CONFIG_SOFTMMU)
1016 tcg_out_tlb_load(s, addr_regl, oi, label_ptr, 0);
1017 base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0);
1018 tcg_out_qemu_st_indexed(s, data_regl, base, TCG_REG_TMP2, opc);
1019 add_qemu_ldst_label(s, 0, oi,
1020 0, /* type param is unused for stores */
1021 data_regl, addr_regl,
1022 s->code_ptr, label_ptr);
1023 #else
1024 a_bits = get_alignment_bits(opc);
1025 if (a_bits) {
1026 tcg_out_test_alignment(s, false, addr_regl, a_bits);
1027 }
1028 base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0);
1029 TCGReg guest_base_reg = USE_GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_ZERO;
1030 tcg_out_qemu_st_indexed(s, data_regl, base, guest_base_reg, opc);
1031 #endif
1032 }
1034 /*
1035 * Entry-points
1036 */
1038 static const tcg_insn_unit *tb_ret_addr;
1040 static void tcg_out_op(TCGContext *s, TCGOpcode opc,
1041 const TCGArg args[TCG_MAX_OP_ARGS],
1042 const int const_args[TCG_MAX_OP_ARGS])
1043 {
1044 TCGArg a0 = args[0];
1045 TCGArg a1 = args[1];
1046 TCGArg a2 = args[2];
1047 int c2 = const_args[2];
1049 switch (opc) {
1050 case INDEX_op_exit_tb:
1051 /* Reuse the zeroing that exists for goto_ptr. */
1052 if (a0 == 0) {
1053 tcg_out_call_int(s, tcg_code_gen_epilogue, true);
1054 } else {
1055 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A0, a0);
1056 tcg_out_call_int(s, tb_ret_addr, true);
1057 }
1058 break;
1060 case INDEX_op_goto_tb:
1061 assert(s->tb_jmp_insn_offset == 0);
1062 /* indirect jump method */
1063 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_REG_ZERO,
1064 (uintptr_t)(s->tb_jmp_target_addr + a0));
1065 tcg_out_opc_jirl(s, TCG_REG_ZERO, TCG_REG_TMP0, 0);
1066 set_jmp_reset_offset(s, a0);
1067 break;
1069 case INDEX_op_mb:
1070 tcg_out_mb(s, a0);
1071 break;
1073 case INDEX_op_goto_ptr:
1074 tcg_out_opc_jirl(s, TCG_REG_ZERO, a0, 0);
1075 break;
1077 case INDEX_op_br:
1078 tcg_out_reloc(s, s->code_ptr, R_LOONGARCH_BR_SD10K16, arg_label(a0),
1079 0);
1080 tcg_out_opc_b(s, 0);
1081 break;
1083 case INDEX_op_brcond_i32:
1084 case INDEX_op_brcond_i64:
1085 tcg_out_brcond(s, a2, a0, a1, arg_label(args[3]));
1086 break;
1088 case INDEX_op_ext8s_i32:
1089 case INDEX_op_ext8s_i64:
1090 tcg_out_ext8s(s, a0, a1);
1091 break;
1093 case INDEX_op_ext8u_i32:
1094 case INDEX_op_ext8u_i64:
1095 tcg_out_ext8u(s, a0, a1);
1096 break;
1098 case INDEX_op_ext16s_i32:
1099 case INDEX_op_ext16s_i64:
1100 tcg_out_ext16s(s, a0, a1);
1101 break;
1103 case INDEX_op_ext16u_i32:
1104 case INDEX_op_ext16u_i64:
1105 tcg_out_ext16u(s, a0, a1);
1106 break;
1108 case INDEX_op_ext32u_i64:
1109 case INDEX_op_extu_i32_i64:
1110 tcg_out_ext32u(s, a0, a1);
1111 break;
1113 case INDEX_op_ext32s_i64:
1114 case INDEX_op_extrl_i64_i32:
1115 case INDEX_op_ext_i32_i64:
1116 tcg_out_ext32s(s, a0, a1);
1117 break;
1119 case INDEX_op_extrh_i64_i32:
1120 tcg_out_opc_srai_d(s, a0, a1, 32);
1121 break;
1123 case INDEX_op_not_i32:
1124 case INDEX_op_not_i64:
1125 tcg_out_opc_nor(s, a0, a1, TCG_REG_ZERO);
1126 break;
1128 case INDEX_op_nor_i32:
1129 case INDEX_op_nor_i64:
1130 if (c2) {
1131 tcg_out_opc_ori(s, a0, a1, a2);
1132 tcg_out_opc_nor(s, a0, a0, TCG_REG_ZERO);
1133 } else {
1134 tcg_out_opc_nor(s, a0, a1, a2);
1135 }
1136 break;
1138 case INDEX_op_andc_i32:
1139 case INDEX_op_andc_i64:
1140 if (c2) {
1141 /* guaranteed to fit due to constraint */
1142 tcg_out_opc_andi(s, a0, a1, ~a2);
1143 } else {
1144 tcg_out_opc_andn(s, a0, a1, a2);
1145 }
1146 break;
1148 case INDEX_op_orc_i32:
1149 case INDEX_op_orc_i64:
1150 if (c2) {
1151 /* guaranteed to fit due to constraint */
1152 tcg_out_opc_ori(s, a0, a1, ~a2);
1153 } else {
1154 tcg_out_opc_orn(s, a0, a1, a2);
1155 }
1156 break;
1158 case INDEX_op_and_i32:
1159 case INDEX_op_and_i64:
1160 if (c2) {
1161 tcg_out_opc_andi(s, a0, a1, a2);
1162 } else {
1163 tcg_out_opc_and(s, a0, a1, a2);
1164 }
1165 break;
1167 case INDEX_op_or_i32:
1168 case INDEX_op_or_i64:
1169 if (c2) {
1170 tcg_out_opc_ori(s, a0, a1, a2);
1171 } else {
1172 tcg_out_opc_or(s, a0, a1, a2);
1173 }
1174 break;
1176 case INDEX_op_xor_i32:
1177 case INDEX_op_xor_i64:
1178 if (c2) {
1179 tcg_out_opc_xori(s, a0, a1, a2);
1180 } else {
1181 tcg_out_opc_xor(s, a0, a1, a2);
1182 }
1183 break;
1185 case INDEX_op_extract_i32:
1186 tcg_out_opc_bstrpick_w(s, a0, a1, a2, a2 + args[3] - 1);
1187 break;
1188 case INDEX_op_extract_i64:
1189 tcg_out_opc_bstrpick_d(s, a0, a1, a2, a2 + args[3] - 1);
1190 break;
1192 case INDEX_op_deposit_i32:
1193 tcg_out_opc_bstrins_w(s, a0, a2, args[3], args[3] + args[4] - 1);
1194 break;
1195 case INDEX_op_deposit_i64:
1196 tcg_out_opc_bstrins_d(s, a0, a2, args[3], args[3] + args[4] - 1);
1197 break;
1199 case INDEX_op_bswap16_i32:
1200 case INDEX_op_bswap16_i64:
1201 tcg_out_opc_revb_2h(s, a0, a1);
1202 if (a2 & TCG_BSWAP_OS) {
1203 tcg_out_ext16s(s, a0, a0);
1204 } else if ((a2 & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) {
1205 tcg_out_ext16u(s, a0, a0);
1206 }
1207 break;
1209 case INDEX_op_bswap32_i32:
1210 /* All 32-bit values are computed sign-extended in the register. */
1211 a2 = TCG_BSWAP_OS;
1212 /* fallthrough */
1213 case INDEX_op_bswap32_i64:
1214 tcg_out_opc_revb_2w(s, a0, a1);
1215 if (a2 & TCG_BSWAP_OS) {
1216 tcg_out_ext32s(s, a0, a0);
1217 } else if ((a2 & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) {
1218 tcg_out_ext32u(s, a0, a0);
1219 }
1220 break;
1222 case INDEX_op_bswap64_i64:
1223 tcg_out_opc_revb_d(s, a0, a1);
1224 break;
1226 case INDEX_op_clz_i32:
1227 tcg_out_clzctz(s, OPC_CLZ_W, a0, a1, a2, c2, true);
1228 break;
1229 case INDEX_op_clz_i64:
1230 tcg_out_clzctz(s, OPC_CLZ_D, a0, a1, a2, c2, false);
1231 break;
1233 case INDEX_op_ctz_i32:
1234 tcg_out_clzctz(s, OPC_CTZ_W, a0, a1, a2, c2, true);
1235 break;
1236 case INDEX_op_ctz_i64:
1237 tcg_out_clzctz(s, OPC_CTZ_D, a0, a1, a2, c2, false);
1238 break;
1240 case INDEX_op_shl_i32:
1241 if (c2) {
1242 tcg_out_opc_slli_w(s, a0, a1, a2 & 0x1f);
1243 } else {
1244 tcg_out_opc_sll_w(s, a0, a1, a2);
1245 }
1246 break;
1247 case INDEX_op_shl_i64:
1248 if (c2) {
1249 tcg_out_opc_slli_d(s, a0, a1, a2 & 0x3f);
1250 } else {
1251 tcg_out_opc_sll_d(s, a0, a1, a2);
1252 }
1253 break;
1255 case INDEX_op_shr_i32:
1256 if (c2) {
1257 tcg_out_opc_srli_w(s, a0, a1, a2 & 0x1f);
1258 } else {
1259 tcg_out_opc_srl_w(s, a0, a1, a2);
1260 }
1261 break;
1262 case INDEX_op_shr_i64:
1263 if (c2) {
1264 tcg_out_opc_srli_d(s, a0, a1, a2 & 0x3f);
1265 } else {
1266 tcg_out_opc_srl_d(s, a0, a1, a2);
1267 }
1268 break;
1270 case INDEX_op_sar_i32:
1271 if (c2) {
1272 tcg_out_opc_srai_w(s, a0, a1, a2 & 0x1f);
1273 } else {
1274 tcg_out_opc_sra_w(s, a0, a1, a2);
1275 }
1276 break;
1277 case INDEX_op_sar_i64:
1278 if (c2) {
1279 tcg_out_opc_srai_d(s, a0, a1, a2 & 0x3f);
1280 } else {
1281 tcg_out_opc_sra_d(s, a0, a1, a2);
1282 }
1283 break;
1285 case INDEX_op_rotl_i32:
1286 /* transform into equivalent rotr/rotri */
1287 if (c2) {
1288 tcg_out_opc_rotri_w(s, a0, a1, (32 - a2) & 0x1f);
1289 } else {
1290 tcg_out_opc_sub_w(s, TCG_REG_TMP0, TCG_REG_ZERO, a2);
1291 tcg_out_opc_rotr_w(s, a0, a1, TCG_REG_TMP0);
1292 }
1293 break;
1294 case INDEX_op_rotl_i64:
1295 /* transform into equivalent rotr/rotri */
1296 if (c2) {
1297 tcg_out_opc_rotri_d(s, a0, a1, (64 - a2) & 0x3f);
1298 } else {
1299 tcg_out_opc_sub_w(s, TCG_REG_TMP0, TCG_REG_ZERO, a2);
1300 tcg_out_opc_rotr_d(s, a0, a1, TCG_REG_TMP0);
1301 }
1302 break;
1304 case INDEX_op_rotr_i32:
1305 if (c2) {
1306 tcg_out_opc_rotri_w(s, a0, a1, a2 & 0x1f);
1307 } else {
1308 tcg_out_opc_rotr_w(s, a0, a1, a2);
1309 }
1310 break;
1311 case INDEX_op_rotr_i64:
1312 if (c2) {
1313 tcg_out_opc_rotri_d(s, a0, a1, a2 & 0x3f);
1314 } else {
1315 tcg_out_opc_rotr_d(s, a0, a1, a2);
1316 }
1317 break;
1319 case INDEX_op_add_i32:
1320 if (c2) {
1321 tcg_out_opc_addi_w(s, a0, a1, a2);
1322 } else {
1323 tcg_out_opc_add_w(s, a0, a1, a2);
1324 }
1325 break;
1326 case INDEX_op_add_i64:
1327 if (c2) {
1328 tcg_out_opc_addi_d(s, a0, a1, a2);
1329 } else {
1330 tcg_out_opc_add_d(s, a0, a1, a2);
1331 }
1332 break;
1334 case INDEX_op_sub_i32:
1335 if (c2) {
1336 tcg_out_opc_addi_w(s, a0, a1, -a2);
1337 } else {
1338 tcg_out_opc_sub_w(s, a0, a1, a2);
1339 }
1340 break;
1341 case INDEX_op_sub_i64:
1342 if (c2) {
1343 tcg_out_opc_addi_d(s, a0, a1, -a2);
1344 } else {
1345 tcg_out_opc_sub_d(s, a0, a1, a2);
1346 }
1347 break;
1349 case INDEX_op_mul_i32:
1350 tcg_out_opc_mul_w(s, a0, a1, a2);
1351 break;
1352 case INDEX_op_mul_i64:
1353 tcg_out_opc_mul_d(s, a0, a1, a2);
1354 break;
1356 case INDEX_op_mulsh_i32:
1357 tcg_out_opc_mulh_w(s, a0, a1, a2);
1358 break;
1359 case INDEX_op_mulsh_i64:
1360 tcg_out_opc_mulh_d(s, a0, a1, a2);
1361 break;
1363 case INDEX_op_muluh_i32:
1364 tcg_out_opc_mulh_wu(s, a0, a1, a2);
1365 break;
1366 case INDEX_op_muluh_i64:
1367 tcg_out_opc_mulh_du(s, a0, a1, a2);
1368 break;
1370 case INDEX_op_div_i32:
1371 tcg_out_opc_div_w(s, a0, a1, a2);
1372 break;
1373 case INDEX_op_div_i64:
1374 tcg_out_opc_div_d(s, a0, a1, a2);
1375 break;
1377 case INDEX_op_divu_i32:
1378 tcg_out_opc_div_wu(s, a0, a1, a2);
1379 break;
1380 case INDEX_op_divu_i64:
1381 tcg_out_opc_div_du(s, a0, a1, a2);
1382 break;
1384 case INDEX_op_rem_i32:
1385 tcg_out_opc_mod_w(s, a0, a1, a2);
1386 break;
1387 case INDEX_op_rem_i64:
1388 tcg_out_opc_mod_d(s, a0, a1, a2);
1389 break;
1391 case INDEX_op_remu_i32:
1392 tcg_out_opc_mod_wu(s, a0, a1, a2);
1393 break;
1394 case INDEX_op_remu_i64:
1395 tcg_out_opc_mod_du(s, a0, a1, a2);
1396 break;
1398 case INDEX_op_setcond_i32:
1399 case INDEX_op_setcond_i64:
1400 tcg_out_setcond(s, args[3], a0, a1, a2, c2);
1401 break;
1403 case INDEX_op_ld8s_i32:
1404 case INDEX_op_ld8s_i64:
1405 tcg_out_ldst(s, OPC_LD_B, a0, a1, a2);
1406 break;
1407 case INDEX_op_ld8u_i32:
1408 case INDEX_op_ld8u_i64:
1409 tcg_out_ldst(s, OPC_LD_BU, a0, a1, a2);
1410 break;
1411 case INDEX_op_ld16s_i32:
1412 case INDEX_op_ld16s_i64:
1413 tcg_out_ldst(s, OPC_LD_H, a0, a1, a2);
1414 break;
1415 case INDEX_op_ld16u_i32:
1416 case INDEX_op_ld16u_i64:
1417 tcg_out_ldst(s, OPC_LD_HU, a0, a1, a2);
1418 break;
1419 case INDEX_op_ld_i32:
1420 case INDEX_op_ld32s_i64:
1421 tcg_out_ldst(s, OPC_LD_W, a0, a1, a2);
1422 break;
1423 case INDEX_op_ld32u_i64:
1424 tcg_out_ldst(s, OPC_LD_WU, a0, a1, a2);
1425 break;
1426 case INDEX_op_ld_i64:
1427 tcg_out_ldst(s, OPC_LD_D, a0, a1, a2);
1428 break;
1430 case INDEX_op_st8_i32:
1431 case INDEX_op_st8_i64:
1432 tcg_out_ldst(s, OPC_ST_B, a0, a1, a2);
1433 break;
1434 case INDEX_op_st16_i32:
1435 case INDEX_op_st16_i64:
1436 tcg_out_ldst(s, OPC_ST_H, a0, a1, a2);
1437 break;
1438 case INDEX_op_st_i32:
1439 case INDEX_op_st32_i64:
1440 tcg_out_ldst(s, OPC_ST_W, a0, a1, a2);
1441 break;
1442 case INDEX_op_st_i64:
1443 tcg_out_ldst(s, OPC_ST_D, a0, a1, a2);
1444 break;
1446 case INDEX_op_qemu_ld_i32:
1447 tcg_out_qemu_ld(s, args, TCG_TYPE_I32);
1448 break;
1449 case INDEX_op_qemu_ld_i64:
1450 tcg_out_qemu_ld(s, args, TCG_TYPE_I64);
1451 break;
1452 case INDEX_op_qemu_st_i32:
1453 tcg_out_qemu_st(s, args);
1454 break;
1455 case INDEX_op_qemu_st_i64:
1456 tcg_out_qemu_st(s, args);
1457 break;
1459 case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */
1460 case INDEX_op_mov_i64:
1461 case INDEX_op_call: /* Always emitted via tcg_out_call. */
1462 default:
1463 g_assert_not_reached();
1464 }
1465 }
1467 static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op)
1468 {
1469 switch (op) {
1470 case INDEX_op_goto_ptr:
1471 return C_O0_I1(r);
1473 case INDEX_op_st8_i32:
1474 case INDEX_op_st8_i64:
1475 case INDEX_op_st16_i32:
1476 case INDEX_op_st16_i64:
1477 case INDEX_op_st32_i64:
1478 case INDEX_op_st_i32:
1479 case INDEX_op_st_i64:
1480 return C_O0_I2(rZ, r);
1482 case INDEX_op_brcond_i32:
1483 case INDEX_op_brcond_i64:
1484 return C_O0_I2(rZ, rZ);
1486 case INDEX_op_qemu_st_i32:
1487 case INDEX_op_qemu_st_i64:
1488 return C_O0_I2(LZ, L);
1490 case INDEX_op_ext8s_i32:
1491 case INDEX_op_ext8s_i64:
1492 case INDEX_op_ext8u_i32:
1493 case INDEX_op_ext8u_i64:
1494 case INDEX_op_ext16s_i32:
1495 case INDEX_op_ext16s_i64:
1496 case INDEX_op_ext16u_i32:
1497 case INDEX_op_ext16u_i64:
1498 case INDEX_op_ext32s_i64:
1499 case INDEX_op_ext32u_i64:
1500 case INDEX_op_extu_i32_i64:
1501 case INDEX_op_extrl_i64_i32:
1502 case INDEX_op_extrh_i64_i32:
1503 case INDEX_op_ext_i32_i64:
1504 case INDEX_op_not_i32:
1505 case INDEX_op_not_i64:
1506 case INDEX_op_extract_i32:
1507 case INDEX_op_extract_i64:
1508 case INDEX_op_bswap16_i32:
1509 case INDEX_op_bswap16_i64:
1510 case INDEX_op_bswap32_i32:
1511 case INDEX_op_bswap32_i64:
1512 case INDEX_op_bswap64_i64:
1513 case INDEX_op_ld8s_i32:
1514 case INDEX_op_ld8s_i64:
1515 case INDEX_op_ld8u_i32:
1516 case INDEX_op_ld8u_i64:
1517 case INDEX_op_ld16s_i32:
1518 case INDEX_op_ld16s_i64:
1519 case INDEX_op_ld16u_i32:
1520 case INDEX_op_ld16u_i64:
1521 case INDEX_op_ld32s_i64:
1522 case INDEX_op_ld32u_i64:
1523 case INDEX_op_ld_i32:
1524 case INDEX_op_ld_i64:
1525 return C_O1_I1(r, r);
1527 case INDEX_op_qemu_ld_i32:
1528 case INDEX_op_qemu_ld_i64:
1529 return C_O1_I1(r, L);
1531 case INDEX_op_andc_i32:
1532 case INDEX_op_andc_i64:
1533 case INDEX_op_orc_i32:
1534 case INDEX_op_orc_i64:
1535 /*
1536 * LoongArch insns for these ops don't have reg-imm forms, but we
1537 * can express using andi/ori if ~constant satisfies
1538 * TCG_CT_CONST_U12.
1539 */
1540 return C_O1_I2(r, r, rC);
1542 case INDEX_op_shl_i32:
1543 case INDEX_op_shl_i64:
1544 case INDEX_op_shr_i32:
1545 case INDEX_op_shr_i64:
1546 case INDEX_op_sar_i32:
1547 case INDEX_op_sar_i64:
1548 case INDEX_op_rotl_i32:
1549 case INDEX_op_rotl_i64:
1550 case INDEX_op_rotr_i32:
1551 case INDEX_op_rotr_i64:
1552 return C_O1_I2(r, r, ri);
1554 case INDEX_op_add_i32:
1555 case INDEX_op_add_i64:
1556 return C_O1_I2(r, r, rI);
1558 case INDEX_op_and_i32:
1559 case INDEX_op_and_i64:
1560 case INDEX_op_nor_i32:
1561 case INDEX_op_nor_i64:
1562 case INDEX_op_or_i32:
1563 case INDEX_op_or_i64:
1564 case INDEX_op_xor_i32:
1565 case INDEX_op_xor_i64:
1566 /* LoongArch reg-imm bitops have their imms ZERO-extended */
1567 return C_O1_I2(r, r, rU);
1569 case INDEX_op_clz_i32:
1570 case INDEX_op_clz_i64:
1571 case INDEX_op_ctz_i32:
1572 case INDEX_op_ctz_i64:
1573 return C_O1_I2(r, r, rW);
1575 case INDEX_op_setcond_i32:
1576 case INDEX_op_setcond_i64:
1577 return C_O1_I2(r, r, rZ);
1579 case INDEX_op_deposit_i32:
1580 case INDEX_op_deposit_i64:
1581 /* Must deposit into the same register as input */
1582 return C_O1_I2(r, 0, rZ);
1584 case INDEX_op_sub_i32:
1585 case INDEX_op_sub_i64:
1586 return C_O1_I2(r, rZ, rN);
1588 case INDEX_op_mul_i32:
1589 case INDEX_op_mul_i64:
1590 case INDEX_op_mulsh_i32:
1591 case INDEX_op_mulsh_i64:
1592 case INDEX_op_muluh_i32:
1593 case INDEX_op_muluh_i64:
1594 case INDEX_op_div_i32:
1595 case INDEX_op_div_i64:
1596 case INDEX_op_divu_i32:
1597 case INDEX_op_divu_i64:
1598 case INDEX_op_rem_i32:
1599 case INDEX_op_rem_i64:
1600 case INDEX_op_remu_i32:
1601 case INDEX_op_remu_i64:
1602 return C_O1_I2(r, rZ, rZ);
1604 default:
1605 g_assert_not_reached();
1606 }
1607 }
1609 static const int tcg_target_callee_save_regs[] = {
1610 TCG_REG_S0, /* used for the global env (TCG_AREG0) */
1611 TCG_REG_S1,
1612 TCG_REG_S2,
1613 TCG_REG_S3,
1614 TCG_REG_S4,
1615 TCG_REG_S5,
1616 TCG_REG_S6,
1617 TCG_REG_S7,
1618 TCG_REG_S8,
1619 TCG_REG_S9,
1620 TCG_REG_RA, /* should be last for ABI compliance */
1621 };
1623 /* Stack frame parameters. */
1624 #define REG_SIZE (TCG_TARGET_REG_BITS / 8)
1625 #define SAVE_SIZE ((int)ARRAY_SIZE(tcg_target_callee_save_regs) * REG_SIZE)
1626 #define TEMP_SIZE (CPU_TEMP_BUF_NLONGS * (int)sizeof(long))
1627 #define FRAME_SIZE ((TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE + SAVE_SIZE \
1628 + TCG_TARGET_STACK_ALIGN - 1) \
1629 & -TCG_TARGET_STACK_ALIGN)
1630 #define SAVE_OFS (TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE)
1632 /* We're expecting to be able to use an immediate for frame allocation. */
1633 QEMU_BUILD_BUG_ON(FRAME_SIZE > 0x7ff);
1635 /* Generate global QEMU prologue and epilogue code */
1636 static void tcg_target_qemu_prologue(TCGContext *s)
1637 {
1638 int i;
1640 tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE, TEMP_SIZE);
1642 /* TB prologue */
1643 tcg_out_opc_addi_d(s, TCG_REG_SP, TCG_REG_SP, -FRAME_SIZE);
1644 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
1645 tcg_out_st(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i],
1646 TCG_REG_SP, SAVE_OFS + i * REG_SIZE);
1647 }
1649 #if !defined(CONFIG_SOFTMMU)
1650 if (USE_GUEST_BASE) {
1651 tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base);
1652 tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
1653 }
1654 #endif
1656 /* Call generated code */
1657 tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
1658 tcg_out_opc_jirl(s, TCG_REG_ZERO, tcg_target_call_iarg_regs[1], 0);
1660 /* Return path for goto_ptr. Set return value to 0 */
1661 tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
1662 tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_A0, TCG_REG_ZERO);
1664 /* TB epilogue */
1665 tb_ret_addr = tcg_splitwx_to_rx(s->code_ptr);
1666 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
1667 tcg_out_ld(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i],
1668 TCG_REG_SP, SAVE_OFS + i * REG_SIZE);
1669 }
1671 tcg_out_opc_addi_d(s, TCG_REG_SP, TCG_REG_SP, FRAME_SIZE);
1672 tcg_out_opc_jirl(s, TCG_REG_ZERO, TCG_REG_RA, 0);
1673 }
1675 static void tcg_target_init(TCGContext *s)
1676 {
1677 tcg_target_available_regs[TCG_TYPE_I32] = ALL_GENERAL_REGS;
1678 tcg_target_available_regs[TCG_TYPE_I64] = ALL_GENERAL_REGS;
1680 tcg_target_call_clobber_regs = ALL_GENERAL_REGS;
1681 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S0);
1682 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S1);
1683 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S2);
1684 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S3);
1685 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S4);
1686 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S5);
1687 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S6);
1688 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S7);
1689 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S8);
1690 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S9);
1692 s->reserved_regs = 0;
1693 tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO);
1694 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP0);
1695 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP1);
1696 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP2);
1697 tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP);
1698 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TP);
1699 tcg_regset_set_reg(s->reserved_regs, TCG_REG_RESERVED);
1700 }
1702 typedef struct {
1703 DebugFrameHeader h;
1704 uint8_t fde_def_cfa[4];
1705 uint8_t fde_reg_ofs[ARRAY_SIZE(tcg_target_callee_save_regs) * 2];
1706 } DebugFrame;
1708 #define ELF_HOST_MACHINE EM_LOONGARCH
1710 static const DebugFrame debug_frame = {
1711 .h.cie.len = sizeof(DebugFrameCIE) - 4, /* length after .len member */
1712 .h.cie.id = -1,
1713 .h.cie.version = 1,
1714 .h.cie.code_align = 1,
1715 .h.cie.data_align = -(TCG_TARGET_REG_BITS / 8) & 0x7f, /* sleb128 */
1716 .h.cie.return_column = TCG_REG_RA,
1718 /* Total FDE size does not include the "len" member. */
1719 .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset),
1721 .fde_def_cfa = {
1722 12, TCG_REG_SP, /* DW_CFA_def_cfa sp, ... */
1723 (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */
1724 (FRAME_SIZE >> 7)
1725 },
1726 .fde_reg_ofs = {
1727 0x80 + 23, 11, /* DW_CFA_offset, s0, -88 */
1728 0x80 + 24, 10, /* DW_CFA_offset, s1, -80 */
1729 0x80 + 25, 9, /* DW_CFA_offset, s2, -72 */
1730 0x80 + 26, 8, /* DW_CFA_offset, s3, -64 */
1731 0x80 + 27, 7, /* DW_CFA_offset, s4, -56 */
1732 0x80 + 28, 6, /* DW_CFA_offset, s5, -48 */
1733 0x80 + 29, 5, /* DW_CFA_offset, s6, -40 */
1734 0x80 + 30, 4, /* DW_CFA_offset, s7, -32 */
1735 0x80 + 31, 3, /* DW_CFA_offset, s8, -24 */
1736 0x80 + 22, 2, /* DW_CFA_offset, s9, -16 */
1737 0x80 + 1 , 1, /* DW_CFA_offset, ra, -8 */
1738 }
1739 };
1741 void tcg_register_jit(const void *buf, size_t buf_size)
1742 {
1743 tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));
1744 }