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Merge remote-tracking branch 'remotes/jasowang/tags/net-pull-request' into staging
[qemu/ar7.git] / tcg / riscv / tcg-target.inc.c
blob3e76bf5738f00a7e5e182ae06ed83d69fc7ebae5
1 /*
2 * Tiny Code Generator for QEMU
3 *
4 * Copyright (c) 2018 SiFive, Inc
5 * Copyright (c) 2008-2009 Arnaud Patard <arnaud.patard@rtp-net.org>
6 * Copyright (c) 2009 Aurelien Jarno <aurelien@aurel32.net>
7 * Copyright (c) 2008 Fabrice Bellard
8 *
9 * Based on i386/tcg-target.c and mips/tcg-target.c
10 *
11 * Permission is hereby granted, free of charge, to any person obtaining a copy
12 * of this software and associated documentation files (the "Software"), to deal
13 * in the Software without restriction, including without limitation the rights
14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
15 * copies of the Software, and to permit persons to whom the Software is
16 * furnished to do so, subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
24 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
26 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 * THE SOFTWARE.
28 */
29
30 #include "tcg-pool.inc.c"
31
32 #ifdef CONFIG_DEBUG_TCG
33 static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
34 "zero",
35 "ra",
36 "sp",
37 "gp",
38 "tp",
39 "t0",
40 "t1",
41 "t2",
42 "s0",
43 "s1",
44 "a0",
45 "a1",
46 "a2",
47 "a3",
48 "a4",
49 "a5",
50 "a6",
51 "a7",
52 "s2",
53 "s3",
54 "s4",
55 "s5",
56 "s6",
57 "s7",
58 "s8",
59 "s9",
60 "s10",
61 "s11",
62 "t3",
63 "t4",
64 "t5",
65 "t6"
66 };
67 #endif
68
69 static const int tcg_target_reg_alloc_order[] = {
70 /* Call saved registers */
71 /* TCG_REG_S0 reservered for TCG_AREG0 */
72 TCG_REG_S1,
73 TCG_REG_S2,
74 TCG_REG_S3,
75 TCG_REG_S4,
76 TCG_REG_S5,
77 TCG_REG_S6,
78 TCG_REG_S7,
79 TCG_REG_S8,
80 TCG_REG_S9,
81 TCG_REG_S10,
82 TCG_REG_S11,
83
84 /* Call clobbered registers */
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
93 /* Argument registers */
94 TCG_REG_A0,
95 TCG_REG_A1,
96 TCG_REG_A2,
97 TCG_REG_A3,
98 TCG_REG_A4,
99 TCG_REG_A5,
100 TCG_REG_A6,
101 TCG_REG_A7,
102 };
103
104 static const int tcg_target_call_iarg_regs[] = {
105 TCG_REG_A0,
106 TCG_REG_A1,
107 TCG_REG_A2,
108 TCG_REG_A3,
109 TCG_REG_A4,
110 TCG_REG_A5,
111 TCG_REG_A6,
112 TCG_REG_A7,
113 };
114
115 static const int tcg_target_call_oarg_regs[] = {
116 TCG_REG_A0,
117 TCG_REG_A1,
118 };
119
120 #define TCG_CT_CONST_ZERO 0x100
121 #define TCG_CT_CONST_S12 0x200
122 #define TCG_CT_CONST_N12 0x400
123 #define TCG_CT_CONST_M12 0x800
124
125 static inline tcg_target_long sextreg(tcg_target_long val, int pos, int len)
126 {
127 if (TCG_TARGET_REG_BITS == 32) {
128 return sextract32(val, pos, len);
129 } else {
130 return sextract64(val, pos, len);
131 }
132 }
133
134 /* parse target specific constraints */
135 static const char *target_parse_constraint(TCGArgConstraint *ct,
136 const char *ct_str, TCGType type)
137 {
138 switch (*ct_str++) {
139 case 'r':
140 ct->ct |= TCG_CT_REG;
141 ct->u.regs = 0xffffffff;
142 break;
143 case 'L':
144 /* qemu_ld/qemu_st constraint */
145 ct->ct |= TCG_CT_REG;
146 ct->u.regs = 0xffffffff;
147 /* qemu_ld/qemu_st uses TCG_REG_TMP0 */
148 #if defined(CONFIG_SOFTMMU)
149 tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[0]);
150 tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[1]);
151 tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[2]);
152 tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[3]);
153 tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[4]);
154 #endif
155 break;
156 case 'I':
157 ct->ct |= TCG_CT_CONST_S12;
158 break;
159 case 'N':
160 ct->ct |= TCG_CT_CONST_N12;
161 break;
162 case 'M':
163 ct->ct |= TCG_CT_CONST_M12;
164 break;
165 case 'Z':
166 /* we can use a zero immediate as a zero register argument. */
167 ct->ct |= TCG_CT_CONST_ZERO;
168 break;
169 default:
170 return NULL;
171 }
172 return ct_str;
173 }
174
175 /* test if a constant matches the constraint */
176 static int tcg_target_const_match(tcg_target_long val, TCGType type,
177 const TCGArgConstraint *arg_ct)
178 {
179 int ct = arg_ct->ct;
180 if (ct & TCG_CT_CONST) {
181 return 1;
182 }
183 if ((ct & TCG_CT_CONST_ZERO) && val == 0) {
184 return 1;
185 }
186 if ((ct & TCG_CT_CONST_S12) && val == sextreg(val, 0, 12)) {
187 return 1;
188 }
189 if ((ct & TCG_CT_CONST_N12) && -val == sextreg(-val, 0, 12)) {
190 return 1;
191 }
192 if ((ct & TCG_CT_CONST_M12) && val >= -0xfff && val <= 0xfff) {
193 return 1;
194 }
195 return 0;
196 }
197
198 /*
199 * RISC-V Base ISA opcodes (IM)
200 */
201
202 typedef enum {
203 OPC_ADD = 0x33,
204 OPC_ADDI = 0x13,
205 OPC_AND = 0x7033,
206 OPC_ANDI = 0x7013,
207 OPC_AUIPC = 0x17,
208 OPC_BEQ = 0x63,
209 OPC_BGE = 0x5063,
210 OPC_BGEU = 0x7063,
211 OPC_BLT = 0x4063,
212 OPC_BLTU = 0x6063,
213 OPC_BNE = 0x1063,
214 OPC_DIV = 0x2004033,
215 OPC_DIVU = 0x2005033,
216 OPC_JAL = 0x6f,
217 OPC_JALR = 0x67,
218 OPC_LB = 0x3,
219 OPC_LBU = 0x4003,
220 OPC_LD = 0x3003,
221 OPC_LH = 0x1003,
222 OPC_LHU = 0x5003,
223 OPC_LUI = 0x37,
224 OPC_LW = 0x2003,
225 OPC_LWU = 0x6003,
226 OPC_MUL = 0x2000033,
227 OPC_MULH = 0x2001033,
228 OPC_MULHSU = 0x2002033,
229 OPC_MULHU = 0x2003033,
230 OPC_OR = 0x6033,
231 OPC_ORI = 0x6013,
232 OPC_REM = 0x2006033,
233 OPC_REMU = 0x2007033,
234 OPC_SB = 0x23,
235 OPC_SD = 0x3023,
236 OPC_SH = 0x1023,
237 OPC_SLL = 0x1033,
238 OPC_SLLI = 0x1013,
239 OPC_SLT = 0x2033,
240 OPC_SLTI = 0x2013,
241 OPC_SLTIU = 0x3013,
242 OPC_SLTU = 0x3033,
243 OPC_SRA = 0x40005033,
244 OPC_SRAI = 0x40005013,
245 OPC_SRL = 0x5033,
246 OPC_SRLI = 0x5013,
247 OPC_SUB = 0x40000033,
248 OPC_SW = 0x2023,
249 OPC_XOR = 0x4033,
250 OPC_XORI = 0x4013,
251
252 #if TCG_TARGET_REG_BITS == 64
253 OPC_ADDIW = 0x1b,
254 OPC_ADDW = 0x3b,
255 OPC_DIVUW = 0x200503b,
256 OPC_DIVW = 0x200403b,
257 OPC_MULW = 0x200003b,
258 OPC_REMUW = 0x200703b,
259 OPC_REMW = 0x200603b,
260 OPC_SLLIW = 0x101b,
261 OPC_SLLW = 0x103b,
262 OPC_SRAIW = 0x4000501b,
263 OPC_SRAW = 0x4000503b,
264 OPC_SRLIW = 0x501b,
265 OPC_SRLW = 0x503b,
266 OPC_SUBW = 0x4000003b,
267 #else
268 /* Simplify code throughout by defining aliases for RV32. */
269 OPC_ADDIW = OPC_ADDI,
270 OPC_ADDW = OPC_ADD,
271 OPC_DIVUW = OPC_DIVU,
272 OPC_DIVW = OPC_DIV,
273 OPC_MULW = OPC_MUL,
274 OPC_REMUW = OPC_REMU,
275 OPC_REMW = OPC_REM,
276 OPC_SLLIW = OPC_SLLI,
277 OPC_SLLW = OPC_SLL,
278 OPC_SRAIW = OPC_SRAI,
279 OPC_SRAW = OPC_SRA,
280 OPC_SRLIW = OPC_SRLI,
281 OPC_SRLW = OPC_SRL,
282 OPC_SUBW = OPC_SUB,
283 #endif
284
285 OPC_FENCE = 0x0000000f,
286 } RISCVInsn;
287
288 /*
289 * RISC-V immediate and instruction encoders (excludes 16-bit RVC)
290 */
291
292 /* Type-R */
293
294 static int32_t encode_r(RISCVInsn opc, TCGReg rd, TCGReg rs1, TCGReg rs2)
295 {
296 return opc | (rd & 0x1f) << 7 | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20;
297 }
298
299 /* Type-I */
300
301 static int32_t encode_imm12(uint32_t imm)
302 {
303 return (imm & 0xfff) << 20;
304 }
305
306 static int32_t encode_i(RISCVInsn opc, TCGReg rd, TCGReg rs1, uint32_t imm)
307 {
308 return opc | (rd & 0x1f) << 7 | (rs1 & 0x1f) << 15 | encode_imm12(imm);
309 }
310
311 /* Type-S */
312
313 static int32_t encode_simm12(uint32_t imm)
314 {
315 int32_t ret = 0;
316
317 ret |= (imm & 0xFE0) << 20;
318 ret |= (imm & 0x1F) << 7;
319
320 return ret;
321 }
322
323 static int32_t encode_s(RISCVInsn opc, TCGReg rs1, TCGReg rs2, uint32_t imm)
324 {
325 return opc | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20 | encode_simm12(imm);
326 }
327
328 /* Type-SB */
329
330 static int32_t encode_sbimm12(uint32_t imm)
331 {
332 int32_t ret = 0;
333
334 ret |= (imm & 0x1000) << 19;
335 ret |= (imm & 0x7e0) << 20;
336 ret |= (imm & 0x1e) << 7;
337 ret |= (imm & 0x800) >> 4;
338
339 return ret;
340 }
341
342 static int32_t encode_sb(RISCVInsn opc, TCGReg rs1, TCGReg rs2, uint32_t imm)
343 {
344 return opc | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20 | encode_sbimm12(imm);
345 }
346
347 /* Type-U */
348
349 static int32_t encode_uimm20(uint32_t imm)
350 {
351 return imm & 0xfffff000;
352 }
353
354 static int32_t encode_u(RISCVInsn opc, TCGReg rd, uint32_t imm)
355 {
356 return opc | (rd & 0x1f) << 7 | encode_uimm20(imm);
357 }
358
359 /* Type-UJ */
360
361 static int32_t encode_ujimm20(uint32_t imm)
362 {
363 int32_t ret = 0;
364
365 ret |= (imm & 0x0007fe) << (21 - 1);
366 ret |= (imm & 0x000800) << (20 - 11);
367 ret |= (imm & 0x0ff000) << (12 - 12);
368 ret |= (imm & 0x100000) << (31 - 20);
369
370 return ret;
371 }
372
373 static int32_t encode_uj(RISCVInsn opc, TCGReg rd, uint32_t imm)
374 {
375 return opc | (rd & 0x1f) << 7 | encode_ujimm20(imm);
376 }
377
378 /*
379 * RISC-V instruction emitters
380 */
381
382 static void tcg_out_opc_reg(TCGContext *s, RISCVInsn opc,
383 TCGReg rd, TCGReg rs1, TCGReg rs2)
384 {
385 tcg_out32(s, encode_r(opc, rd, rs1, rs2));
386 }
387
388 static void tcg_out_opc_imm(TCGContext *s, RISCVInsn opc,
389 TCGReg rd, TCGReg rs1, TCGArg imm)
390 {
391 tcg_out32(s, encode_i(opc, rd, rs1, imm));
392 }
393
394 static void tcg_out_opc_store(TCGContext *s, RISCVInsn opc,
395 TCGReg rs1, TCGReg rs2, uint32_t imm)
396 {
397 tcg_out32(s, encode_s(opc, rs1, rs2, imm));
398 }
399
400 static void tcg_out_opc_branch(TCGContext *s, RISCVInsn opc,
401 TCGReg rs1, TCGReg rs2, uint32_t imm)
402 {
403 tcg_out32(s, encode_sb(opc, rs1, rs2, imm));
404 }
405
406 static void tcg_out_opc_upper(TCGContext *s, RISCVInsn opc,
407 TCGReg rd, uint32_t imm)
408 {
409 tcg_out32(s, encode_u(opc, rd, imm));
410 }
411
412 static void tcg_out_opc_jump(TCGContext *s, RISCVInsn opc,
413 TCGReg rd, uint32_t imm)
414 {
415 tcg_out32(s, encode_uj(opc, rd, imm));
416 }
417
418 static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
419 {
420 int i;
421 for (i = 0; i < count; ++i) {
422 p[i] = encode_i(OPC_ADDI, TCG_REG_ZERO, TCG_REG_ZERO, 0);
423 }
424 }
425
426 /*
427 * Relocations
428 */
429
430 static bool reloc_sbimm12(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
431 {
432 intptr_t offset = (intptr_t)target - (intptr_t)code_ptr;
433
434 if (offset == sextreg(offset, 1, 12) << 1) {
435 code_ptr[0] |= encode_sbimm12(offset);
436 return true;
437 }
438
439 return false;
440 }
441
442 static bool reloc_jimm20(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
443 {
444 intptr_t offset = (intptr_t)target - (intptr_t)code_ptr;
445
446 if (offset == sextreg(offset, 1, 20) << 1) {
447 code_ptr[0] |= encode_ujimm20(offset);
448 return true;
449 }
450
451 return false;
452 }
453
454 static bool reloc_call(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
455 {
456 intptr_t offset = (intptr_t)target - (intptr_t)code_ptr;
457 int32_t lo = sextreg(offset, 0, 12);
458 int32_t hi = offset - lo;
459
460 if (offset == hi + lo) {
461 code_ptr[0] |= encode_uimm20(hi);
462 code_ptr[1] |= encode_imm12(lo);
463 return true;
464 }
465
466 return false;
467 }
468
469 static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
470 intptr_t value, intptr_t addend)
471 {
472 uint32_t insn = *code_ptr;
473 intptr_t diff;
474 bool short_jmp;
475
476 tcg_debug_assert(addend == 0);
477
478 switch (type) {
479 case R_RISCV_BRANCH:
480 diff = value - (uintptr_t)code_ptr;
481 short_jmp = diff == sextreg(diff, 0, 12);
482 if (short_jmp) {
483 return reloc_sbimm12(code_ptr, (tcg_insn_unit *)value);
484 } else {
485 /* Invert the condition */
486 insn = insn ^ (1 << 12);
487 /* Clear the offset */
488 insn &= 0x01fff07f;
489 /* Set the offset to the PC + 8 */
490 insn |= encode_sbimm12(8);
491
492 /* Move forward */
493 code_ptr[0] = insn;
494
495 /* Overwrite the NOP with jal x0,value */
496 diff = value - (uintptr_t)(code_ptr + 1);
497 insn = encode_uj(OPC_JAL, TCG_REG_ZERO, diff);
498 code_ptr[1] = insn;
499
500 return true;
501 }
502 break;
503 case R_RISCV_JAL:
504 return reloc_jimm20(code_ptr, (tcg_insn_unit *)value);
505 break;
506 case R_RISCV_CALL:
507 return reloc_call(code_ptr, (tcg_insn_unit *)value);
508 break;
509 default:
510 tcg_abort();
511 }
512 }
513
514 /*
515 * TCG intrinsics
516 */
517
518 static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg)
519 {
520 if (ret == arg) {
521 return true;
522 }
523 switch (type) {
524 case TCG_TYPE_I32:
525 case TCG_TYPE_I64:
526 tcg_out_opc_imm(s, OPC_ADDI, ret, arg, 0);
527 break;
528 default:
529 g_assert_not_reached();
530 }
531 return true;
532 }
533
534 static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd,
535 tcg_target_long val)
536 {
537 tcg_target_long lo, hi, tmp;
538 int shift, ret;
539
540 if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) {
541 val = (int32_t)val;
542 }
543
544 lo = sextreg(val, 0, 12);
545 if (val == lo) {
546 tcg_out_opc_imm(s, OPC_ADDI, rd, TCG_REG_ZERO, lo);
547 return;
548 }
549
550 hi = val - lo;
551 if (TCG_TARGET_REG_BITS == 32 || val == (int32_t)val) {
552 tcg_out_opc_upper(s, OPC_LUI, rd, hi);
553 if (lo != 0) {
554 tcg_out_opc_imm(s, OPC_ADDIW, rd, rd, lo);
555 }
556 return;
557 }
558
559 /* We can only be here if TCG_TARGET_REG_BITS != 32 */
560 tmp = tcg_pcrel_diff(s, (void *)val);
561 if (tmp == (int32_t)tmp) {
562 tcg_out_opc_upper(s, OPC_AUIPC, rd, 0);
563 tcg_out_opc_imm(s, OPC_ADDI, rd, rd, 0);
564 ret = reloc_call(s->code_ptr - 2, (tcg_insn_unit *)val);
565 tcg_debug_assert(ret == true);
566 return;
567 }
568
569 /* Look for a single 20-bit section. */
570 shift = ctz64(val);
571 tmp = val >> shift;
572 if (tmp == sextreg(tmp, 0, 20)) {
573 tcg_out_opc_upper(s, OPC_LUI, rd, tmp << 12);
574 if (shift > 12) {
575 tcg_out_opc_imm(s, OPC_SLLI, rd, rd, shift - 12);
576 } else {
577 tcg_out_opc_imm(s, OPC_SRAI, rd, rd, 12 - shift);
578 }
579 return;
580 }
581
582 /* Look for a few high zero bits, with lots of bits set in the middle. */
583 shift = clz64(val);
584 tmp = val << shift;
585 if (tmp == sextreg(tmp, 12, 20) << 12) {
586 tcg_out_opc_upper(s, OPC_LUI, rd, tmp);
587 tcg_out_opc_imm(s, OPC_SRLI, rd, rd, shift);
588 return;
589 } else if (tmp == sextreg(tmp, 0, 12)) {
590 tcg_out_opc_imm(s, OPC_ADDI, rd, TCG_REG_ZERO, tmp);
591 tcg_out_opc_imm(s, OPC_SRLI, rd, rd, shift);
592 return;
593 }
594
595 /* Drop into the constant pool. */
596 new_pool_label(s, val, R_RISCV_CALL, s->code_ptr, 0);
597 tcg_out_opc_upper(s, OPC_AUIPC, rd, 0);
598 tcg_out_opc_imm(s, OPC_LD, rd, rd, 0);
599 }
600
601 static void tcg_out_ext8u(TCGContext *s, TCGReg ret, TCGReg arg)
602 {
603 tcg_out_opc_imm(s, OPC_ANDI, ret, arg, 0xff);
604 }
605
606 static void tcg_out_ext16u(TCGContext *s, TCGReg ret, TCGReg arg)
607 {
608 tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 16);
609 tcg_out_opc_imm(s, OPC_SRLIW, ret, ret, 16);
610 }
611
612 static void tcg_out_ext32u(TCGContext *s, TCGReg ret, TCGReg arg)
613 {
614 tcg_out_opc_imm(s, OPC_SLLI, ret, arg, 32);
615 tcg_out_opc_imm(s, OPC_SRLI, ret, ret, 32);
616 }
617
618 static void tcg_out_ext8s(TCGContext *s, TCGReg ret, TCGReg arg)
619 {
620 tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 24);
621 tcg_out_opc_imm(s, OPC_SRAIW, ret, ret, 24);
622 }
623
624 static void tcg_out_ext16s(TCGContext *s, TCGReg ret, TCGReg arg)
625 {
626 tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 16);
627 tcg_out_opc_imm(s, OPC_SRAIW, ret, ret, 16);
628 }
629
630 static void tcg_out_ext32s(TCGContext *s, TCGReg ret, TCGReg arg)
631 {
632 tcg_out_opc_imm(s, OPC_ADDIW, ret, arg, 0);
633 }
634
635 static void tcg_out_ldst(TCGContext *s, RISCVInsn opc, TCGReg data,
636 TCGReg addr, intptr_t offset)
637 {
638 intptr_t imm12 = sextreg(offset, 0, 12);
639
640 if (offset != imm12) {
641 intptr_t diff = offset - (uintptr_t)s->code_ptr;
642
643 if (addr == TCG_REG_ZERO && diff == (int32_t)diff) {
644 imm12 = sextreg(diff, 0, 12);
645 tcg_out_opc_upper(s, OPC_AUIPC, TCG_REG_TMP2, diff - imm12);
646 } else {
647 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP2, offset - imm12);
648 if (addr != TCG_REG_ZERO) {
649 tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP2, TCG_REG_TMP2, addr);
650 }
651 }
652 addr = TCG_REG_TMP2;
653 }
654
655 switch (opc) {
656 case OPC_SB:
657 case OPC_SH:
658 case OPC_SW:
659 case OPC_SD:
660 tcg_out_opc_store(s, opc, addr, data, imm12);
661 break;
662 case OPC_LB:
663 case OPC_LBU:
664 case OPC_LH:
665 case OPC_LHU:
666 case OPC_LW:
667 case OPC_LWU:
668 case OPC_LD:
669 tcg_out_opc_imm(s, opc, data, addr, imm12);
670 break;
671 default:
672 g_assert_not_reached();
673 }
674 }
675
676 static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg,
677 TCGReg arg1, intptr_t arg2)
678 {
679 bool is32bit = (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32);
680 tcg_out_ldst(s, is32bit ? OPC_LW : OPC_LD, arg, arg1, arg2);
681 }
682
683 static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg,
684 TCGReg arg1, intptr_t arg2)
685 {
686 bool is32bit = (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32);
687 tcg_out_ldst(s, is32bit ? OPC_SW : OPC_SD, arg, arg1, arg2);
688 }
689
690 static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val,
691 TCGReg base, intptr_t ofs)
692 {
693 if (val == 0) {
694 tcg_out_st(s, type, TCG_REG_ZERO, base, ofs);
695 return true;
696 }
697 return false;
698 }
699
700 static void tcg_out_addsub2(TCGContext *s,
701 TCGReg rl, TCGReg rh,
702 TCGReg al, TCGReg ah,
703 TCGArg bl, TCGArg bh,
704 bool cbl, bool cbh, bool is_sub, bool is32bit)
705 {
706 const RISCVInsn opc_add = is32bit ? OPC_ADDW : OPC_ADD;
707 const RISCVInsn opc_addi = is32bit ? OPC_ADDIW : OPC_ADDI;
708 const RISCVInsn opc_sub = is32bit ? OPC_SUBW : OPC_SUB;
709 TCGReg th = TCG_REG_TMP1;
710
711 /* If we have a negative constant such that negating it would
712 make the high part zero, we can (usually) eliminate one insn. */
713 if (cbl && cbh && bh == -1 && bl != 0) {
714 bl = -bl;
715 bh = 0;
716 is_sub = !is_sub;
717 }
718
719 /* By operating on the high part first, we get to use the final
720 carry operation to move back from the temporary. */
721 if (!cbh) {
722 tcg_out_opc_reg(s, (is_sub ? opc_sub : opc_add), th, ah, bh);
723 } else if (bh != 0 || ah == rl) {
724 tcg_out_opc_imm(s, opc_addi, th, ah, (is_sub ? -bh : bh));
725 } else {
726 th = ah;
727 }
728
729 /* Note that tcg optimization should eliminate the bl == 0 case. */
730 if (is_sub) {
731 if (cbl) {
732 tcg_out_opc_imm(s, OPC_SLTIU, TCG_REG_TMP0, al, bl);
733 tcg_out_opc_imm(s, opc_addi, rl, al, -bl);
734 } else {
735 tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_TMP0, al, bl);
736 tcg_out_opc_reg(s, opc_sub, rl, al, bl);
737 }
738 tcg_out_opc_reg(s, opc_sub, rh, th, TCG_REG_TMP0);
739 } else {
740 if (cbl) {
741 tcg_out_opc_imm(s, opc_addi, rl, al, bl);
742 tcg_out_opc_imm(s, OPC_SLTIU, TCG_REG_TMP0, rl, bl);
743 } else if (rl == al && rl == bl) {
744 tcg_out_opc_imm(s, OPC_SLTI, TCG_REG_TMP0, al, 0);
745 tcg_out_opc_reg(s, opc_addi, rl, al, bl);
746 } else {
747 tcg_out_opc_reg(s, opc_add, rl, al, bl);
748 tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_TMP0,
749 rl, (rl == bl ? al : bl));
750 }
751 tcg_out_opc_reg(s, opc_add, rh, th, TCG_REG_TMP0);
752 }
753 }
754
755 static const struct {
756 RISCVInsn op;
757 bool swap;
758 } tcg_brcond_to_riscv[] = {
759 [TCG_COND_EQ] = { OPC_BEQ, false },
760 [TCG_COND_NE] = { OPC_BNE, false },
761 [TCG_COND_LT] = { OPC_BLT, false },
762 [TCG_COND_GE] = { OPC_BGE, false },
763 [TCG_COND_LE] = { OPC_BGE, true },
764 [TCG_COND_GT] = { OPC_BLT, true },
765 [TCG_COND_LTU] = { OPC_BLTU, false },
766 [TCG_COND_GEU] = { OPC_BGEU, false },
767 [TCG_COND_LEU] = { OPC_BGEU, true },
768 [TCG_COND_GTU] = { OPC_BLTU, true }
769 };
770
771 static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1,
772 TCGReg arg2, TCGLabel *l)
773 {
774 RISCVInsn op = tcg_brcond_to_riscv[cond].op;
775
776 tcg_debug_assert(op != 0);
777
778 if (tcg_brcond_to_riscv[cond].swap) {
779 TCGReg t = arg1;
780 arg1 = arg2;
781 arg2 = t;
782 }
783
784 if (l->has_value) {
785 intptr_t diff = tcg_pcrel_diff(s, l->u.value_ptr);
786 if (diff == sextreg(diff, 0, 12)) {
787 tcg_out_opc_branch(s, op, arg1, arg2, diff);
788 } else {
789 /* Invert the conditional branch. */
790 tcg_out_opc_branch(s, op ^ (1 << 12), arg1, arg2, 8);
791 tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, diff - 4);
792 }
793 } else {
794 tcg_out_reloc(s, s->code_ptr, R_RISCV_BRANCH, l, 0);
795 tcg_out_opc_branch(s, op, arg1, arg2, 0);
796 /* NOP to allow patching later */
797 tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_ZERO, TCG_REG_ZERO, 0);
798 }
799 }
800
801 static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret,
802 TCGReg arg1, TCGReg arg2)
803 {
804 switch (cond) {
805 case TCG_COND_EQ:
806 tcg_out_opc_reg(s, OPC_SUB, ret, arg1, arg2);
807 tcg_out_opc_imm(s, OPC_SLTIU, ret, ret, 1);
808 break;
809 case TCG_COND_NE:
810 tcg_out_opc_reg(s, OPC_SUB, ret, arg1, arg2);
811 tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, ret);
812 break;
813 case TCG_COND_LT:
814 tcg_out_opc_reg(s, OPC_SLT, ret, arg1, arg2);
815 break;
816 case TCG_COND_GE:
817 tcg_out_opc_reg(s, OPC_SLT, ret, arg1, arg2);
818 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1);
819 break;
820 case TCG_COND_LE:
821 tcg_out_opc_reg(s, OPC_SLT, ret, arg2, arg1);
822 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1);
823 break;
824 case TCG_COND_GT:
825 tcg_out_opc_reg(s, OPC_SLT, ret, arg2, arg1);
826 break;
827 case TCG_COND_LTU:
828 tcg_out_opc_reg(s, OPC_SLTU, ret, arg1, arg2);
829 break;
830 case TCG_COND_GEU:
831 tcg_out_opc_reg(s, OPC_SLTU, ret, arg1, arg2);
832 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1);
833 break;
834 case TCG_COND_LEU:
835 tcg_out_opc_reg(s, OPC_SLTU, ret, arg2, arg1);
836 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1);
837 break;
838 case TCG_COND_GTU:
839 tcg_out_opc_reg(s, OPC_SLTU, ret, arg2, arg1);
840 break;
841 default:
842 g_assert_not_reached();
843 break;
844 }
845 }
846
847 static void tcg_out_brcond2(TCGContext *s, TCGCond cond, TCGReg al, TCGReg ah,
848 TCGReg bl, TCGReg bh, TCGLabel *l)
849 {
850 /* todo */
851 g_assert_not_reached();
852 }
853
854 static void tcg_out_setcond2(TCGContext *s, TCGCond cond, TCGReg ret,
855 TCGReg al, TCGReg ah, TCGReg bl, TCGReg bh)
856 {
857 /* todo */
858 g_assert_not_reached();
859 }
860
861 static inline void tcg_out_goto(TCGContext *s, tcg_insn_unit *target)
862 {
863 ptrdiff_t offset = tcg_pcrel_diff(s, target);
864 tcg_debug_assert(offset == sextreg(offset, 1, 20) << 1);
865 tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, offset);
866 }
867
868 static void tcg_out_call_int(TCGContext *s, tcg_insn_unit *arg, bool tail)
869 {
870 TCGReg link = tail ? TCG_REG_ZERO : TCG_REG_RA;
871 ptrdiff_t offset = tcg_pcrel_diff(s, arg);
872 int ret;
873
874 if (offset == sextreg(offset, 1, 20) << 1) {
875 /* short jump: -2097150 to 2097152 */
876 tcg_out_opc_jump(s, OPC_JAL, link, offset);
877 } else if (TCG_TARGET_REG_BITS == 32 ||
878 offset == sextreg(offset, 1, 31) << 1) {
879 /* long jump: -2147483646 to 2147483648 */
880 tcg_out_opc_upper(s, OPC_AUIPC, TCG_REG_TMP0, 0);
881 tcg_out_opc_imm(s, OPC_JALR, link, TCG_REG_TMP0, 0);
882 ret = reloc_call(s->code_ptr - 2, arg);\
883 tcg_debug_assert(ret == true);
884 } else if (TCG_TARGET_REG_BITS == 64) {
885 /* far jump: 64-bit */
886 tcg_target_long imm = sextreg((tcg_target_long)arg, 0, 12);
887 tcg_target_long base = (tcg_target_long)arg - imm;
888 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP0, base);
889 tcg_out_opc_imm(s, OPC_JALR, link, TCG_REG_TMP0, imm);
890 } else {
891 g_assert_not_reached();
892 }
893 }
894
895 static void tcg_out_call(TCGContext *s, tcg_insn_unit *arg)
896 {
897 tcg_out_call_int(s, arg, false);
898 }
899
900 static void tcg_out_mb(TCGContext *s, TCGArg a0)
901 {
902 tcg_insn_unit insn = OPC_FENCE;
903
904 if (a0 & TCG_MO_LD_LD) {
905 insn |= 0x02200000;
906 }
907 if (a0 & TCG_MO_ST_LD) {
908 insn |= 0x01200000;
909 }
910 if (a0 & TCG_MO_LD_ST) {
911 insn |= 0x02100000;
912 }
913 if (a0 & TCG_MO_ST_ST) {
914 insn |= 0x02200000;
915 }
916 tcg_out32(s, insn);
917 }
918
919 /*
920 * Load/store and TLB
921 */
922
923 #if defined(CONFIG_SOFTMMU)
924 #include "tcg-ldst.inc.c"
925
926 /* helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr,
927 * TCGMemOpIdx oi, uintptr_t ra)
928 */
929 static void * const qemu_ld_helpers[16] = {
930 [MO_UB] = helper_ret_ldub_mmu,
931 [MO_SB] = helper_ret_ldsb_mmu,
932 [MO_LEUW] = helper_le_lduw_mmu,
933 [MO_LESW] = helper_le_ldsw_mmu,
934 [MO_LEUL] = helper_le_ldul_mmu,
935 #if TCG_TARGET_REG_BITS == 64
936 [MO_LESL] = helper_le_ldsl_mmu,
937 #endif
938 [MO_LEQ] = helper_le_ldq_mmu,
939 [MO_BEUW] = helper_be_lduw_mmu,
940 [MO_BESW] = helper_be_ldsw_mmu,
941 [MO_BEUL] = helper_be_ldul_mmu,
942 #if TCG_TARGET_REG_BITS == 64
943 [MO_BESL] = helper_be_ldsl_mmu,
944 #endif
945 [MO_BEQ] = helper_be_ldq_mmu,
946 };
947
948 /* helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr,
949 * uintxx_t val, TCGMemOpIdx oi,
950 * uintptr_t ra)
951 */
952 static void * const qemu_st_helpers[16] = {
953 [MO_UB] = helper_ret_stb_mmu,
954 [MO_LEUW] = helper_le_stw_mmu,
955 [MO_LEUL] = helper_le_stl_mmu,
956 [MO_LEQ] = helper_le_stq_mmu,
957 [MO_BEUW] = helper_be_stw_mmu,
958 [MO_BEUL] = helper_be_stl_mmu,
959 [MO_BEQ] = helper_be_stq_mmu,
960 };
961
962 /* We don't support oversize guests */
963 QEMU_BUILD_BUG_ON(TCG_TARGET_REG_BITS < TARGET_LONG_BITS);
964
965 /* We expect to use a 12-bit negative offset from ENV. */
966 QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0);
967 QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -(1 << 11));
968
969 static void tcg_out_tlb_load(TCGContext *s, TCGReg addrl,
970 TCGReg addrh, TCGMemOpIdx oi,
971 tcg_insn_unit **label_ptr, bool is_load)
972 {
973 TCGMemOp opc = get_memop(oi);
974 unsigned s_bits = opc & MO_SIZE;
975 unsigned a_bits = get_alignment_bits(opc);
976 tcg_target_long compare_mask;
977 int mem_index = get_mmuidx(oi);
978 int fast_ofs = TLB_MASK_TABLE_OFS(mem_index);
979 int mask_ofs = fast_ofs + offsetof(CPUTLBDescFast, mask);
980 int table_ofs = fast_ofs + offsetof(CPUTLBDescFast, table);
981 TCGReg mask_base = TCG_AREG0, table_base = TCG_AREG0;
982
983 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, mask_base, mask_ofs);
984 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP1, table_base, table_ofs);
985
986 tcg_out_opc_imm(s, OPC_SRLI, TCG_REG_TMP2, addrl,
987 TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
988 tcg_out_opc_reg(s, OPC_AND, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP0);
989 tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP1);
990
991 /* Load the tlb comparator and the addend. */
992 tcg_out_ld(s, TCG_TYPE_TL, TCG_REG_TMP0, TCG_REG_TMP2,
993 is_load ? offsetof(CPUTLBEntry, addr_read)
994 : offsetof(CPUTLBEntry, addr_write));
995 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP2, TCG_REG_TMP2,
996 offsetof(CPUTLBEntry, addend));
997
998 /* We don't support unaligned accesses. */
999 if (a_bits < s_bits) {
1000 a_bits = s_bits;
1001 }
1002 /* Clear the non-page, non-alignment bits from the address. */
1003 compare_mask = (tcg_target_long)TARGET_PAGE_MASK | ((1 << a_bits) - 1);
1004 if (compare_mask == sextreg(compare_mask, 0, 12)) {
1005 tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_TMP1, addrl, compare_mask);
1006 } else {
1007 tcg_out_movi(s, TCG_TYPE_TL, TCG_REG_TMP1, compare_mask);
1008 tcg_out_opc_reg(s, OPC_AND, TCG_REG_TMP1, TCG_REG_TMP1, addrl);
1009 }
1010
1011 /* Compare masked address with the TLB entry. */
1012 label_ptr[0] = s->code_ptr;
1013 tcg_out_opc_branch(s, OPC_BNE, TCG_REG_TMP0, TCG_REG_TMP1, 0);
1014 /* NOP to allow patching later */
1015 tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_ZERO, TCG_REG_ZERO, 0);
1016
1017 /* TLB Hit - translate address using addend. */
1018 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
1019 tcg_out_ext32u(s, TCG_REG_TMP0, addrl);
1020 addrl = TCG_REG_TMP0;
1021 }
1022 tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP0, TCG_REG_TMP2, addrl);
1023 }
1024
1025 static void add_qemu_ldst_label(TCGContext *s, int is_ld, TCGMemOpIdx oi,
1026 TCGType ext,
1027 TCGReg datalo, TCGReg datahi,
1028 TCGReg addrlo, TCGReg addrhi,
1029 void *raddr, tcg_insn_unit **label_ptr)
1030 {
1031 TCGLabelQemuLdst *label = new_ldst_label(s);
1032
1033 label->is_ld = is_ld;
1034 label->oi = oi;
1035 label->type = ext;
1036 label->datalo_reg = datalo;
1037 label->datahi_reg = datahi;
1038 label->addrlo_reg = addrlo;
1039 label->addrhi_reg = addrhi;
1040 label->raddr = raddr;
1041 label->label_ptr[0] = label_ptr[0];
1042 }
1043
1044 static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
1045 {
1046 TCGMemOpIdx oi = l->oi;
1047 TCGMemOp opc = get_memop(oi);
1048 TCGReg a0 = tcg_target_call_iarg_regs[0];
1049 TCGReg a1 = tcg_target_call_iarg_regs[1];
1050 TCGReg a2 = tcg_target_call_iarg_regs[2];
1051 TCGReg a3 = tcg_target_call_iarg_regs[3];
1052
1053 /* We don't support oversize guests */
1054 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) {
1055 g_assert_not_reached();
1056 }
1057
1058 /* resolve label address */
1059 if (!patch_reloc(l->label_ptr[0], R_RISCV_BRANCH,
1060 (intptr_t) s->code_ptr, 0)) {
1061 return false;
1062 }
1063
1064 /* call load helper */
1065 tcg_out_mov(s, TCG_TYPE_PTR, a0, TCG_AREG0);
1066 tcg_out_mov(s, TCG_TYPE_PTR, a1, l->addrlo_reg);
1067 tcg_out_movi(s, TCG_TYPE_PTR, a2, oi);
1068 tcg_out_movi(s, TCG_TYPE_PTR, a3, (tcg_target_long)l->raddr);
1069
1070 tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)]);
1071 tcg_out_mov(s, (opc & MO_SIZE) == MO_64, l->datalo_reg, a0);
1072
1073 tcg_out_goto(s, l->raddr);
1074 return true;
1075 }
1076
1077 static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
1078 {
1079 TCGMemOpIdx oi = l->oi;
1080 TCGMemOp opc = get_memop(oi);
1081 TCGMemOp s_bits = opc & MO_SIZE;
1082 TCGReg a0 = tcg_target_call_iarg_regs[0];
1083 TCGReg a1 = tcg_target_call_iarg_regs[1];
1084 TCGReg a2 = tcg_target_call_iarg_regs[2];
1085 TCGReg a3 = tcg_target_call_iarg_regs[3];
1086 TCGReg a4 = tcg_target_call_iarg_regs[4];
1087
1088 /* We don't support oversize guests */
1089 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) {
1090 g_assert_not_reached();
1091 }
1092
1093 /* resolve label address */
1094 if (!patch_reloc(l->label_ptr[0], R_RISCV_BRANCH,
1095 (intptr_t) s->code_ptr, 0)) {
1096 return false;
1097 }
1098
1099 /* call store helper */
1100 tcg_out_mov(s, TCG_TYPE_PTR, a0, TCG_AREG0);
1101 tcg_out_mov(s, TCG_TYPE_PTR, a1, l->addrlo_reg);
1102 tcg_out_mov(s, TCG_TYPE_PTR, a2, l->datalo_reg);
1103 switch (s_bits) {
1104 case MO_8:
1105 tcg_out_ext8u(s, a2, a2);
1106 break;
1107 case MO_16:
1108 tcg_out_ext16u(s, a2, a2);
1109 break;
1110 default:
1111 break;
1112 }
1113 tcg_out_movi(s, TCG_TYPE_PTR, a3, oi);
1114 tcg_out_movi(s, TCG_TYPE_PTR, a4, (tcg_target_long)l->raddr);
1115
1116 tcg_out_call(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SSIZE)]);
1117
1118 tcg_out_goto(s, l->raddr);
1119 return true;
1120 }
1121 #endif /* CONFIG_SOFTMMU */
1122
1123 static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg lo, TCGReg hi,
1124 TCGReg base, TCGMemOp opc, bool is_64)
1125 {
1126 const TCGMemOp bswap = opc & MO_BSWAP;
1127
1128 /* We don't yet handle byteswapping, assert */
1129 g_assert(!bswap);
1130
1131 switch (opc & (MO_SSIZE)) {
1132 case MO_UB:
1133 tcg_out_opc_imm(s, OPC_LBU, lo, base, 0);
1134 break;
1135 case MO_SB:
1136 tcg_out_opc_imm(s, OPC_LB, lo, base, 0);
1137 break;
1138 case MO_UW:
1139 tcg_out_opc_imm(s, OPC_LHU, lo, base, 0);
1140 break;
1141 case MO_SW:
1142 tcg_out_opc_imm(s, OPC_LH, lo, base, 0);
1143 break;
1144 case MO_UL:
1145 if (TCG_TARGET_REG_BITS == 64 && is_64) {
1146 tcg_out_opc_imm(s, OPC_LWU, lo, base, 0);
1147 break;
1148 }
1149 /* FALLTHRU */
1150 case MO_SL:
1151 tcg_out_opc_imm(s, OPC_LW, lo, base, 0);
1152 break;
1153 case MO_Q:
1154 /* Prefer to load from offset 0 first, but allow for overlap. */
1155 if (TCG_TARGET_REG_BITS == 64) {
1156 tcg_out_opc_imm(s, OPC_LD, lo, base, 0);
1157 } else if (lo != base) {
1158 tcg_out_opc_imm(s, OPC_LW, lo, base, 0);
1159 tcg_out_opc_imm(s, OPC_LW, hi, base, 4);
1160 } else {
1161 tcg_out_opc_imm(s, OPC_LW, hi, base, 4);
1162 tcg_out_opc_imm(s, OPC_LW, lo, base, 0);
1163 }
1164 break;
1165 default:
1166 g_assert_not_reached();
1167 }
1168 }
1169
1170 static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is_64)
1171 {
1172 TCGReg addr_regl, addr_regh __attribute__((unused));
1173 TCGReg data_regl, data_regh;
1174 TCGMemOpIdx oi;
1175 TCGMemOp opc;
1176 #if defined(CONFIG_SOFTMMU)
1177 tcg_insn_unit *label_ptr[1];
1178 #endif
1179 TCGReg base = TCG_REG_TMP0;
1180
1181 data_regl = *args++;
1182 data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0);
1183 addr_regl = *args++;
1184 addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0);
1185 oi = *args++;
1186 opc = get_memop(oi);
1187
1188 #if defined(CONFIG_SOFTMMU)
1189 tcg_out_tlb_load(s, addr_regl, addr_regh, oi, label_ptr, 1);
1190 tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64);
1191 add_qemu_ldst_label(s, 1, oi,
1192 (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32),
1193 data_regl, data_regh, addr_regl, addr_regh,
1194 s->code_ptr, label_ptr);
1195 #else
1196 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
1197 tcg_out_ext32u(s, base, addr_regl);
1198 addr_regl = base;
1199 }
1200
1201 if (guest_base == 0) {
1202 tcg_out_opc_reg(s, OPC_ADD, base, addr_regl, TCG_REG_ZERO);
1203 } else {
1204 tcg_out_opc_reg(s, OPC_ADD, base, TCG_GUEST_BASE_REG, addr_regl);
1205 }
1206 tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64);
1207 #endif
1208 }
1209
1210 static void tcg_out_qemu_st_direct(TCGContext *s, TCGReg lo, TCGReg hi,
1211 TCGReg base, TCGMemOp opc)
1212 {
1213 const TCGMemOp bswap = opc & MO_BSWAP;
1214
1215 /* We don't yet handle byteswapping, assert */
1216 g_assert(!bswap);
1217
1218 switch (opc & (MO_SSIZE)) {
1219 case MO_8:
1220 tcg_out_opc_store(s, OPC_SB, base, lo, 0);
1221 break;
1222 case MO_16:
1223 tcg_out_opc_store(s, OPC_SH, base, lo, 0);
1224 break;
1225 case MO_32:
1226 tcg_out_opc_store(s, OPC_SW, base, lo, 0);
1227 break;
1228 case MO_64:
1229 if (TCG_TARGET_REG_BITS == 64) {
1230 tcg_out_opc_store(s, OPC_SD, base, lo, 0);
1231 } else {
1232 tcg_out_opc_store(s, OPC_SW, base, lo, 0);
1233 tcg_out_opc_store(s, OPC_SW, base, hi, 4);
1234 }
1235 break;
1236 default:
1237 g_assert_not_reached();
1238 }
1239 }
1240
1241 static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64)
1242 {
1243 TCGReg addr_regl, addr_regh __attribute__((unused));
1244 TCGReg data_regl, data_regh;
1245 TCGMemOpIdx oi;
1246 TCGMemOp opc;
1247 #if defined(CONFIG_SOFTMMU)
1248 tcg_insn_unit *label_ptr[1];
1249 #endif
1250 TCGReg base = TCG_REG_TMP0;
1251
1252 data_regl = *args++;
1253 data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0);
1254 addr_regl = *args++;
1255 addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0);
1256 oi = *args++;
1257 opc = get_memop(oi);
1258
1259 #if defined(CONFIG_SOFTMMU)
1260 tcg_out_tlb_load(s, addr_regl, addr_regh, oi, label_ptr, 0);
1261 tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc);
1262 add_qemu_ldst_label(s, 0, oi,
1263 (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32),
1264 data_regl, data_regh, addr_regl, addr_regh,
1265 s->code_ptr, label_ptr);
1266 #else
1267 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
1268 tcg_out_ext32u(s, base, addr_regl);
1269 addr_regl = base;
1270 }
1271
1272 if (guest_base == 0) {
1273 tcg_out_opc_reg(s, OPC_ADD, base, addr_regl, TCG_REG_ZERO);
1274 } else {
1275 tcg_out_opc_reg(s, OPC_ADD, base, TCG_GUEST_BASE_REG, addr_regl);
1276 }
1277 tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc);
1278 #endif
1279 }
1280
1281 static tcg_insn_unit *tb_ret_addr;
1282
1283 static void tcg_out_op(TCGContext *s, TCGOpcode opc,
1284 const TCGArg *args, const int *const_args)
1285 {
1286 TCGArg a0 = args[0];
1287 TCGArg a1 = args[1];
1288 TCGArg a2 = args[2];
1289 int c2 = const_args[2];
1290
1291 switch (opc) {
1292 case INDEX_op_exit_tb:
1293 /* Reuse the zeroing that exists for goto_ptr. */
1294 if (a0 == 0) {
1295 tcg_out_call_int(s, s->code_gen_epilogue, true);
1296 } else {
1297 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A0, a0);
1298 tcg_out_call_int(s, tb_ret_addr, true);
1299 }
1300 break;
1301
1302 case INDEX_op_goto_tb:
1303 assert(s->tb_jmp_insn_offset == 0);
1304 /* indirect jump method */
1305 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_REG_ZERO,
1306 (uintptr_t)(s->tb_jmp_target_addr + a0));
1307 tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_TMP0, 0);
1308 set_jmp_reset_offset(s, a0);
1309 break;
1310
1311 case INDEX_op_goto_ptr:
1312 tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, a0, 0);
1313 break;
1314
1315 case INDEX_op_br:
1316 tcg_out_reloc(s, s->code_ptr, R_RISCV_JAL, arg_label(a0), 0);
1317 tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, 0);
1318 break;
1319
1320 case INDEX_op_ld8u_i32:
1321 case INDEX_op_ld8u_i64:
1322 tcg_out_ldst(s, OPC_LBU, a0, a1, a2);
1323 break;
1324 case INDEX_op_ld8s_i32:
1325 case INDEX_op_ld8s_i64:
1326 tcg_out_ldst(s, OPC_LB, a0, a1, a2);
1327 break;
1328 case INDEX_op_ld16u_i32:
1329 case INDEX_op_ld16u_i64:
1330 tcg_out_ldst(s, OPC_LHU, a0, a1, a2);
1331 break;
1332 case INDEX_op_ld16s_i32:
1333 case INDEX_op_ld16s_i64:
1334 tcg_out_ldst(s, OPC_LH, a0, a1, a2);
1335 break;
1336 case INDEX_op_ld32u_i64:
1337 tcg_out_ldst(s, OPC_LWU, a0, a1, a2);
1338 break;
1339 case INDEX_op_ld_i32:
1340 case INDEX_op_ld32s_i64:
1341 tcg_out_ldst(s, OPC_LW, a0, a1, a2);
1342 break;
1343 case INDEX_op_ld_i64:
1344 tcg_out_ldst(s, OPC_LD, a0, a1, a2);
1345 break;
1346
1347 case INDEX_op_st8_i32:
1348 case INDEX_op_st8_i64:
1349 tcg_out_ldst(s, OPC_SB, a0, a1, a2);
1350 break;
1351 case INDEX_op_st16_i32:
1352 case INDEX_op_st16_i64:
1353 tcg_out_ldst(s, OPC_SH, a0, a1, a2);
1354 break;
1355 case INDEX_op_st_i32:
1356 case INDEX_op_st32_i64:
1357 tcg_out_ldst(s, OPC_SW, a0, a1, a2);
1358 break;
1359 case INDEX_op_st_i64:
1360 tcg_out_ldst(s, OPC_SD, a0, a1, a2);
1361 break;
1362
1363 case INDEX_op_add_i32:
1364 if (c2) {
1365 tcg_out_opc_imm(s, OPC_ADDIW, a0, a1, a2);
1366 } else {
1367 tcg_out_opc_reg(s, OPC_ADDW, a0, a1, a2);
1368 }
1369 break;
1370 case INDEX_op_add_i64:
1371 if (c2) {
1372 tcg_out_opc_imm(s, OPC_ADDI, a0, a1, a2);
1373 } else {
1374 tcg_out_opc_reg(s, OPC_ADD, a0, a1, a2);
1375 }
1376 break;
1377
1378 case INDEX_op_sub_i32:
1379 if (c2) {
1380 tcg_out_opc_imm(s, OPC_ADDIW, a0, a1, -a2);
1381 } else {
1382 tcg_out_opc_reg(s, OPC_SUBW, a0, a1, a2);
1383 }
1384 break;
1385 case INDEX_op_sub_i64:
1386 if (c2) {
1387 tcg_out_opc_imm(s, OPC_ADDI, a0, a1, -a2);
1388 } else {
1389 tcg_out_opc_reg(s, OPC_SUB, a0, a1, a2);
1390 }
1391 break;
1392
1393 case INDEX_op_and_i32:
1394 case INDEX_op_and_i64:
1395 if (c2) {
1396 tcg_out_opc_imm(s, OPC_ANDI, a0, a1, a2);
1397 } else {
1398 tcg_out_opc_reg(s, OPC_AND, a0, a1, a2);
1399 }
1400 break;
1401
1402 case INDEX_op_or_i32:
1403 case INDEX_op_or_i64:
1404 if (c2) {
1405 tcg_out_opc_imm(s, OPC_ORI, a0, a1, a2);
1406 } else {
1407 tcg_out_opc_reg(s, OPC_OR, a0, a1, a2);
1408 }
1409 break;
1410
1411 case INDEX_op_xor_i32:
1412 case INDEX_op_xor_i64:
1413 if (c2) {
1414 tcg_out_opc_imm(s, OPC_XORI, a0, a1, a2);
1415 } else {
1416 tcg_out_opc_reg(s, OPC_XOR, a0, a1, a2);
1417 }
1418 break;
1419
1420 case INDEX_op_not_i32:
1421 case INDEX_op_not_i64:
1422 tcg_out_opc_imm(s, OPC_XORI, a0, a1, -1);
1423 break;
1424
1425 case INDEX_op_neg_i32:
1426 tcg_out_opc_reg(s, OPC_SUBW, a0, TCG_REG_ZERO, a1);
1427 break;
1428 case INDEX_op_neg_i64:
1429 tcg_out_opc_reg(s, OPC_SUB, a0, TCG_REG_ZERO, a1);
1430 break;
1431
1432 case INDEX_op_mul_i32:
1433 tcg_out_opc_reg(s, OPC_MULW, a0, a1, a2);
1434 break;
1435 case INDEX_op_mul_i64:
1436 tcg_out_opc_reg(s, OPC_MUL, a0, a1, a2);
1437 break;
1438
1439 case INDEX_op_div_i32:
1440 tcg_out_opc_reg(s, OPC_DIVW, a0, a1, a2);
1441 break;
1442 case INDEX_op_div_i64:
1443 tcg_out_opc_reg(s, OPC_DIV, a0, a1, a2);
1444 break;
1445
1446 case INDEX_op_divu_i32:
1447 tcg_out_opc_reg(s, OPC_DIVUW, a0, a1, a2);
1448 break;
1449 case INDEX_op_divu_i64:
1450 tcg_out_opc_reg(s, OPC_DIVU, a0, a1, a2);
1451 break;
1452
1453 case INDEX_op_rem_i32:
1454 tcg_out_opc_reg(s, OPC_REMW, a0, a1, a2);
1455 break;
1456 case INDEX_op_rem_i64:
1457 tcg_out_opc_reg(s, OPC_REM, a0, a1, a2);
1458 break;
1459
1460 case INDEX_op_remu_i32:
1461 tcg_out_opc_reg(s, OPC_REMUW, a0, a1, a2);
1462 break;
1463 case INDEX_op_remu_i64:
1464 tcg_out_opc_reg(s, OPC_REMU, a0, a1, a2);
1465 break;
1466
1467 case INDEX_op_shl_i32:
1468 if (c2) {
1469 tcg_out_opc_imm(s, OPC_SLLIW, a0, a1, a2);
1470 } else {
1471 tcg_out_opc_reg(s, OPC_SLLW, a0, a1, a2);
1472 }
1473 break;
1474 case INDEX_op_shl_i64:
1475 if (c2) {
1476 tcg_out_opc_imm(s, OPC_SLLI, a0, a1, a2);
1477 } else {
1478 tcg_out_opc_reg(s, OPC_SLL, a0, a1, a2);
1479 }
1480 break;
1481
1482 case INDEX_op_shr_i32:
1483 if (c2) {
1484 tcg_out_opc_imm(s, OPC_SRLIW, a0, a1, a2);
1485 } else {
1486 tcg_out_opc_reg(s, OPC_SRLW, a0, a1, a2);
1487 }
1488 break;
1489 case INDEX_op_shr_i64:
1490 if (c2) {
1491 tcg_out_opc_imm(s, OPC_SRLI, a0, a1, a2);
1492 } else {
1493 tcg_out_opc_reg(s, OPC_SRL, a0, a1, a2);
1494 }
1495 break;
1496
1497 case INDEX_op_sar_i32:
1498 if (c2) {
1499 tcg_out_opc_imm(s, OPC_SRAIW, a0, a1, a2);
1500 } else {
1501 tcg_out_opc_reg(s, OPC_SRAW, a0, a1, a2);
1502 }
1503 break;
1504 case INDEX_op_sar_i64:
1505 if (c2) {
1506 tcg_out_opc_imm(s, OPC_SRAI, a0, a1, a2);
1507 } else {
1508 tcg_out_opc_reg(s, OPC_SRA, a0, a1, a2);
1509 }
1510 break;
1511
1512 case INDEX_op_add2_i32:
1513 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
1514 const_args[4], const_args[5], false, true);
1515 break;
1516 case INDEX_op_add2_i64:
1517 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
1518 const_args[4], const_args[5], false, false);
1519 break;
1520 case INDEX_op_sub2_i32:
1521 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
1522 const_args[4], const_args[5], true, true);
1523 break;
1524 case INDEX_op_sub2_i64:
1525 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
1526 const_args[4], const_args[5], true, false);
1527 break;
1528
1529 case INDEX_op_brcond_i32:
1530 case INDEX_op_brcond_i64:
1531 tcg_out_brcond(s, a2, a0, a1, arg_label(args[3]));
1532 break;
1533 case INDEX_op_brcond2_i32:
1534 tcg_out_brcond2(s, args[4], a0, a1, a2, args[3], arg_label(args[5]));
1535 break;
1536
1537 case INDEX_op_setcond_i32:
1538 case INDEX_op_setcond_i64:
1539 tcg_out_setcond(s, args[3], a0, a1, a2);
1540 break;
1541 case INDEX_op_setcond2_i32:
1542 tcg_out_setcond2(s, args[5], a0, a1, a2, args[3], args[4]);
1543 break;
1544
1545 case INDEX_op_qemu_ld_i32:
1546 tcg_out_qemu_ld(s, args, false);
1547 break;
1548 case INDEX_op_qemu_ld_i64:
1549 tcg_out_qemu_ld(s, args, true);
1550 break;
1551 case INDEX_op_qemu_st_i32:
1552 tcg_out_qemu_st(s, args, false);
1553 break;
1554 case INDEX_op_qemu_st_i64:
1555 tcg_out_qemu_st(s, args, true);
1556 break;
1557
1558 case INDEX_op_ext8u_i32:
1559 case INDEX_op_ext8u_i64:
1560 tcg_out_ext8u(s, a0, a1);
1561 break;
1562
1563 case INDEX_op_ext16u_i32:
1564 case INDEX_op_ext16u_i64:
1565 tcg_out_ext16u(s, a0, a1);
1566 break;
1567
1568 case INDEX_op_ext32u_i64:
1569 case INDEX_op_extu_i32_i64:
1570 tcg_out_ext32u(s, a0, a1);
1571 break;
1572
1573 case INDEX_op_ext8s_i32:
1574 case INDEX_op_ext8s_i64:
1575 tcg_out_ext8s(s, a0, a1);
1576 break;
1577
1578 case INDEX_op_ext16s_i32:
1579 case INDEX_op_ext16s_i64:
1580 tcg_out_ext16s(s, a0, a1);
1581 break;
1582
1583 case INDEX_op_ext32s_i64:
1584 case INDEX_op_extrl_i64_i32:
1585 case INDEX_op_ext_i32_i64:
1586 tcg_out_ext32s(s, a0, a1);
1587 break;
1588
1589 case INDEX_op_extrh_i64_i32:
1590 tcg_out_opc_imm(s, OPC_SRAI, a0, a1, 32);
1591 break;
1592
1593 case INDEX_op_mulsh_i32:
1594 case INDEX_op_mulsh_i64:
1595 tcg_out_opc_reg(s, OPC_MULH, a0, a1, a2);
1596 break;
1597
1598 case INDEX_op_muluh_i32:
1599 case INDEX_op_muluh_i64:
1600 tcg_out_opc_reg(s, OPC_MULHU, a0, a1, a2);
1601 break;
1602
1603 case INDEX_op_mb:
1604 tcg_out_mb(s, a0);
1605 break;
1606
1607 case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */
1608 case INDEX_op_mov_i64:
1609 case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */
1610 case INDEX_op_movi_i64:
1611 case INDEX_op_call: /* Always emitted via tcg_out_call. */
1612 default:
1613 g_assert_not_reached();
1614 }
1615 }
1616
1617 static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
1618 {
1619 static const TCGTargetOpDef r
1620 = { .args_ct_str = { "r" } };
1621 static const TCGTargetOpDef r_r
1622 = { .args_ct_str = { "r", "r" } };
1623 static const TCGTargetOpDef rZ_r
1624 = { .args_ct_str = { "rZ", "r" } };
1625 static const TCGTargetOpDef rZ_rZ
1626 = { .args_ct_str = { "rZ", "rZ" } };
1627 static const TCGTargetOpDef rZ_rZ_rZ_rZ
1628 = { .args_ct_str = { "rZ", "rZ", "rZ", "rZ" } };
1629 static const TCGTargetOpDef r_r_ri
1630 = { .args_ct_str = { "r", "r", "ri" } };
1631 static const TCGTargetOpDef r_r_rI
1632 = { .args_ct_str = { "r", "r", "rI" } };
1633 static const TCGTargetOpDef r_rZ_rN
1634 = { .args_ct_str = { "r", "rZ", "rN" } };
1635 static const TCGTargetOpDef r_rZ_rZ
1636 = { .args_ct_str = { "r", "rZ", "rZ" } };
1637 static const TCGTargetOpDef r_rZ_rZ_rZ_rZ
1638 = { .args_ct_str = { "r", "rZ", "rZ", "rZ", "rZ" } };
1639 static const TCGTargetOpDef r_L
1640 = { .args_ct_str = { "r", "L" } };
1641 static const TCGTargetOpDef r_r_L
1642 = { .args_ct_str = { "r", "r", "L" } };
1643 static const TCGTargetOpDef r_L_L
1644 = { .args_ct_str = { "r", "L", "L" } };
1645 static const TCGTargetOpDef r_r_L_L
1646 = { .args_ct_str = { "r", "r", "L", "L" } };
1647 static const TCGTargetOpDef LZ_L
1648 = { .args_ct_str = { "LZ", "L" } };
1649 static const TCGTargetOpDef LZ_L_L
1650 = { .args_ct_str = { "LZ", "L", "L" } };
1651 static const TCGTargetOpDef LZ_LZ_L
1652 = { .args_ct_str = { "LZ", "LZ", "L" } };
1653 static const TCGTargetOpDef LZ_LZ_L_L
1654 = { .args_ct_str = { "LZ", "LZ", "L", "L" } };
1655 static const TCGTargetOpDef r_r_rZ_rZ_rM_rM
1656 = { .args_ct_str = { "r", "r", "rZ", "rZ", "rM", "rM" } };
1657
1658 switch (op) {
1659 case INDEX_op_goto_ptr:
1660 return &r;
1661
1662 case INDEX_op_ld8u_i32:
1663 case INDEX_op_ld8s_i32:
1664 case INDEX_op_ld16u_i32:
1665 case INDEX_op_ld16s_i32:
1666 case INDEX_op_ld_i32:
1667 case INDEX_op_not_i32:
1668 case INDEX_op_neg_i32:
1669 case INDEX_op_ld8u_i64:
1670 case INDEX_op_ld8s_i64:
1671 case INDEX_op_ld16u_i64:
1672 case INDEX_op_ld16s_i64:
1673 case INDEX_op_ld32s_i64:
1674 case INDEX_op_ld32u_i64:
1675 case INDEX_op_ld_i64:
1676 case INDEX_op_not_i64:
1677 case INDEX_op_neg_i64:
1678 case INDEX_op_ext8u_i32:
1679 case INDEX_op_ext8u_i64:
1680 case INDEX_op_ext16u_i32:
1681 case INDEX_op_ext16u_i64:
1682 case INDEX_op_ext32u_i64:
1683 case INDEX_op_extu_i32_i64:
1684 case INDEX_op_ext8s_i32:
1685 case INDEX_op_ext8s_i64:
1686 case INDEX_op_ext16s_i32:
1687 case INDEX_op_ext16s_i64:
1688 case INDEX_op_ext32s_i64:
1689 case INDEX_op_extrl_i64_i32:
1690 case INDEX_op_extrh_i64_i32:
1691 case INDEX_op_ext_i32_i64:
1692 return &r_r;
1693
1694 case INDEX_op_st8_i32:
1695 case INDEX_op_st16_i32:
1696 case INDEX_op_st_i32:
1697 case INDEX_op_st8_i64:
1698 case INDEX_op_st16_i64:
1699 case INDEX_op_st32_i64:
1700 case INDEX_op_st_i64:
1701 return &rZ_r;
1702
1703 case INDEX_op_add_i32:
1704 case INDEX_op_and_i32:
1705 case INDEX_op_or_i32:
1706 case INDEX_op_xor_i32:
1707 case INDEX_op_add_i64:
1708 case INDEX_op_and_i64:
1709 case INDEX_op_or_i64:
1710 case INDEX_op_xor_i64:
1711 return &r_r_rI;
1712
1713 case INDEX_op_sub_i32:
1714 case INDEX_op_sub_i64:
1715 return &r_rZ_rN;
1716
1717 case INDEX_op_mul_i32:
1718 case INDEX_op_mulsh_i32:
1719 case INDEX_op_muluh_i32:
1720 case INDEX_op_div_i32:
1721 case INDEX_op_divu_i32:
1722 case INDEX_op_rem_i32:
1723 case INDEX_op_remu_i32:
1724 case INDEX_op_setcond_i32:
1725 case INDEX_op_mul_i64:
1726 case INDEX_op_mulsh_i64:
1727 case INDEX_op_muluh_i64:
1728 case INDEX_op_div_i64:
1729 case INDEX_op_divu_i64:
1730 case INDEX_op_rem_i64:
1731 case INDEX_op_remu_i64:
1732 case INDEX_op_setcond_i64:
1733 return &r_rZ_rZ;
1734
1735 case INDEX_op_shl_i32:
1736 case INDEX_op_shr_i32:
1737 case INDEX_op_sar_i32:
1738 case INDEX_op_shl_i64:
1739 case INDEX_op_shr_i64:
1740 case INDEX_op_sar_i64:
1741 return &r_r_ri;
1742
1743 case INDEX_op_brcond_i32:
1744 case INDEX_op_brcond_i64:
1745 return &rZ_rZ;
1746
1747 case INDEX_op_add2_i32:
1748 case INDEX_op_add2_i64:
1749 case INDEX_op_sub2_i32:
1750 case INDEX_op_sub2_i64:
1751 return &r_r_rZ_rZ_rM_rM;
1752
1753 case INDEX_op_brcond2_i32:
1754 return &rZ_rZ_rZ_rZ;
1755
1756 case INDEX_op_setcond2_i32:
1757 return &r_rZ_rZ_rZ_rZ;
1758
1759 case INDEX_op_qemu_ld_i32:
1760 return TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &r_L : &r_L_L;
1761 case INDEX_op_qemu_st_i32:
1762 return TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &LZ_L : &LZ_L_L;
1763 case INDEX_op_qemu_ld_i64:
1764 return TCG_TARGET_REG_BITS == 64 ? &r_L
1765 : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &r_r_L
1766 : &r_r_L_L;
1767 case INDEX_op_qemu_st_i64:
1768 return TCG_TARGET_REG_BITS == 64 ? &LZ_L
1769 : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &LZ_LZ_L
1770 : &LZ_LZ_L_L;
1771
1772 default:
1773 return NULL;
1774 }
1775 }
1776
1777 static const int tcg_target_callee_save_regs[] = {
1778 TCG_REG_S0, /* used for the global env (TCG_AREG0) */
1779 TCG_REG_S1,
1780 TCG_REG_S2,
1781 TCG_REG_S3,
1782 TCG_REG_S4,
1783 TCG_REG_S5,
1784 TCG_REG_S6,
1785 TCG_REG_S7,
1786 TCG_REG_S8,
1787 TCG_REG_S9,
1788 TCG_REG_S10,
1789 TCG_REG_S11,
1790 TCG_REG_RA, /* should be last for ABI compliance */
1791 };
1792
1793 /* Stack frame parameters. */
1794 #define REG_SIZE (TCG_TARGET_REG_BITS / 8)
1795 #define SAVE_SIZE ((int)ARRAY_SIZE(tcg_target_callee_save_regs) * REG_SIZE)
1796 #define TEMP_SIZE (CPU_TEMP_BUF_NLONGS * (int)sizeof(long))
1797 #define FRAME_SIZE ((TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE + SAVE_SIZE \
1798 + TCG_TARGET_STACK_ALIGN - 1) \
1799 & -TCG_TARGET_STACK_ALIGN)
1800 #define SAVE_OFS (TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE)
1801
1802 /* We're expecting to be able to use an immediate for frame allocation. */
1803 QEMU_BUILD_BUG_ON(FRAME_SIZE > 0x7ff);
1804
1805 /* Generate global QEMU prologue and epilogue code */
1806 static void tcg_target_qemu_prologue(TCGContext *s)
1807 {
1808 int i;
1809
1810 tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE, TEMP_SIZE);
1811
1812 /* TB prologue */
1813 tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_SP, TCG_REG_SP, -FRAME_SIZE);
1814 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
1815 tcg_out_st(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i],
1816 TCG_REG_SP, SAVE_OFS + i * REG_SIZE);
1817 }
1818
1819 #if !defined(CONFIG_SOFTMMU)
1820 tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base);
1821 tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
1822 #endif
1823
1824 /* Call generated code */
1825 tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
1826 tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, tcg_target_call_iarg_regs[1], 0);
1827
1828 /* Return path for goto_ptr. Set return value to 0 */
1829 s->code_gen_epilogue = s->code_ptr;
1830 tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_A0, TCG_REG_ZERO);
1831
1832 /* TB epilogue */
1833 tb_ret_addr = s->code_ptr;
1834 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
1835 tcg_out_ld(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i],
1836 TCG_REG_SP, SAVE_OFS + i * REG_SIZE);
1837 }
1838
1839 tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_SP, TCG_REG_SP, FRAME_SIZE);
1840 tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_RA, 0);
1841 }
1842
1843 static void tcg_target_init(TCGContext *s)
1844 {
1845 tcg_target_available_regs[TCG_TYPE_I32] = 0xffffffff;
1846 if (TCG_TARGET_REG_BITS == 64) {
1847 tcg_target_available_regs[TCG_TYPE_I64] = 0xffffffff;
1848 }
1849
1850 tcg_target_call_clobber_regs = -1u;
1851 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S0);
1852 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S1);
1853 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S2);
1854 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S3);
1855 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S4);
1856 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S5);
1857 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S6);
1858 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S7);
1859 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S8);
1860 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S9);
1861 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S10);
1862 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S11);
1863
1864 s->reserved_regs = 0;
1865 tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO);
1866 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP0);
1867 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP1);
1868 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP2);
1869 tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP);
1870 tcg_regset_set_reg(s->reserved_regs, TCG_REG_GP);
1871 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TP);
1872 }
1873
1874 typedef struct {
1875 DebugFrameHeader h;
1876 uint8_t fde_def_cfa[4];
1877 uint8_t fde_reg_ofs[ARRAY_SIZE(tcg_target_callee_save_regs) * 2];
1878 } DebugFrame;
1879
1880 #define ELF_HOST_MACHINE EM_RISCV
1881
1882 static const DebugFrame debug_frame = {
1883 .h.cie.len = sizeof(DebugFrameCIE) - 4, /* length after .len member */
1884 .h.cie.id = -1,
1885 .h.cie.version = 1,
1886 .h.cie.code_align = 1,
1887 .h.cie.data_align = -(TCG_TARGET_REG_BITS / 8) & 0x7f, /* sleb128 */
1888 .h.cie.return_column = TCG_REG_RA,
1889
1890 /* Total FDE size does not include the "len" member. */
1891 .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset),
1892
1893 .fde_def_cfa = {
1894 12, TCG_REG_SP, /* DW_CFA_def_cfa sp, ... */
1895 (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */
1896 (FRAME_SIZE >> 7)
1897 },
1898 .fde_reg_ofs = {
1899 0x80 + 9, 12, /* DW_CFA_offset, s1, -96 */
1900 0x80 + 18, 11, /* DW_CFA_offset, s2, -88 */
1901 0x80 + 19, 10, /* DW_CFA_offset, s3, -80 */
1902 0x80 + 20, 9, /* DW_CFA_offset, s4, -72 */
1903 0x80 + 21, 8, /* DW_CFA_offset, s5, -64 */
1904 0x80 + 22, 7, /* DW_CFA_offset, s6, -56 */
1905 0x80 + 23, 6, /* DW_CFA_offset, s7, -48 */
1906 0x80 + 24, 5, /* DW_CFA_offset, s8, -40 */
1907 0x80 + 25, 4, /* DW_CFA_offset, s9, -32 */
1908 0x80 + 26, 3, /* DW_CFA_offset, s10, -24 */
1909 0x80 + 27, 2, /* DW_CFA_offset, s11, -16 */
1910 0x80 + 1 , 1, /* DW_CFA_offset, ra, -8 */
1911 }
1912 };
1913
1914 void tcg_register_jit(void *buf, size_t buf_size)
1915 {
1916 tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));
1917 }
AR7 emulation for QEMU