| blob | dc8d8f1de233244697b7ea8fad49982edbab9b43 |
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 */
30 #include "../tcg-pool.c.inc"
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
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,
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,
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 };
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 };
115 static const int tcg_target_call_oarg_regs[] = {
116 TCG_REG_A0,
117 TCG_REG_A1,
118 };
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
125 #define ALL_GENERAL_REGS MAKE_64BIT_MASK(0, 32)
126 /*
127 * For softmmu, we need to avoid conflicts with the first 5
128 * argument registers to call the helper. Some of these are
129 * also used for the tlb lookup.
130 */
131 #ifdef CONFIG_SOFTMMU
132 #define SOFTMMU_RESERVE_REGS MAKE_64BIT_MASK(TCG_REG_A0, 5)
133 #else
134 #define SOFTMMU_RESERVE_REGS 0
135 #endif
138 static inline tcg_target_long sextreg(tcg_target_long val, int pos, int len)
139 {
140 if (TCG_TARGET_REG_BITS == 32) {
141 return sextract32(val, pos, len);
142 } else {
143 return sextract64(val, pos, len);
144 }
145 }
147 /* test if a constant matches the constraint */
148 static bool tcg_target_const_match(int64_t val, TCGType type, int ct)
149 {
150 if (ct & TCG_CT_CONST) {
151 return 1;
152 }
153 if ((ct & TCG_CT_CONST_ZERO) && val == 0) {
154 return 1;
155 }
156 if ((ct & TCG_CT_CONST_S12) && val == sextreg(val, 0, 12)) {
157 return 1;
158 }
159 if ((ct & TCG_CT_CONST_N12) && -val == sextreg(-val, 0, 12)) {
160 return 1;
161 }
162 if ((ct & TCG_CT_CONST_M12) && val >= -0xfff && val <= 0xfff) {
163 return 1;
164 }
165 return 0;
166 }
168 /*
169 * RISC-V Base ISA opcodes (IM)
170 */
172 typedef enum {
173 OPC_ADD = 0x33,
174 OPC_ADDI = 0x13,
175 OPC_AND = 0x7033,
176 OPC_ANDI = 0x7013,
177 OPC_AUIPC = 0x17,
178 OPC_BEQ = 0x63,
179 OPC_BGE = 0x5063,
180 OPC_BGEU = 0x7063,
181 OPC_BLT = 0x4063,
182 OPC_BLTU = 0x6063,
183 OPC_BNE = 0x1063,
184 OPC_DIV = 0x2004033,
185 OPC_DIVU = 0x2005033,
186 OPC_JAL = 0x6f,
187 OPC_JALR = 0x67,
188 OPC_LB = 0x3,
189 OPC_LBU = 0x4003,
190 OPC_LD = 0x3003,
191 OPC_LH = 0x1003,
192 OPC_LHU = 0x5003,
193 OPC_LUI = 0x37,
194 OPC_LW = 0x2003,
195 OPC_LWU = 0x6003,
196 OPC_MUL = 0x2000033,
197 OPC_MULH = 0x2001033,
198 OPC_MULHSU = 0x2002033,
199 OPC_MULHU = 0x2003033,
200 OPC_OR = 0x6033,
201 OPC_ORI = 0x6013,
202 OPC_REM = 0x2006033,
203 OPC_REMU = 0x2007033,
204 OPC_SB = 0x23,
205 OPC_SD = 0x3023,
206 OPC_SH = 0x1023,
207 OPC_SLL = 0x1033,
208 OPC_SLLI = 0x1013,
209 OPC_SLT = 0x2033,
210 OPC_SLTI = 0x2013,
211 OPC_SLTIU = 0x3013,
212 OPC_SLTU = 0x3033,
213 OPC_SRA = 0x40005033,
214 OPC_SRAI = 0x40005013,
215 OPC_SRL = 0x5033,
216 OPC_SRLI = 0x5013,
217 OPC_SUB = 0x40000033,
218 OPC_SW = 0x2023,
219 OPC_XOR = 0x4033,
220 OPC_XORI = 0x4013,
222 #if TCG_TARGET_REG_BITS == 64
223 OPC_ADDIW = 0x1b,
224 OPC_ADDW = 0x3b,
225 OPC_DIVUW = 0x200503b,
226 OPC_DIVW = 0x200403b,
227 OPC_MULW = 0x200003b,
228 OPC_REMUW = 0x200703b,
229 OPC_REMW = 0x200603b,
230 OPC_SLLIW = 0x101b,
231 OPC_SLLW = 0x103b,
232 OPC_SRAIW = 0x4000501b,
233 OPC_SRAW = 0x4000503b,
234 OPC_SRLIW = 0x501b,
235 OPC_SRLW = 0x503b,
236 OPC_SUBW = 0x4000003b,
237 #else
238 /* Simplify code throughout by defining aliases for RV32. */
239 OPC_ADDIW = OPC_ADDI,
240 OPC_ADDW = OPC_ADD,
241 OPC_DIVUW = OPC_DIVU,
242 OPC_DIVW = OPC_DIV,
243 OPC_MULW = OPC_MUL,
244 OPC_REMUW = OPC_REMU,
245 OPC_REMW = OPC_REM,
246 OPC_SLLIW = OPC_SLLI,
247 OPC_SLLW = OPC_SLL,
248 OPC_SRAIW = OPC_SRAI,
249 OPC_SRAW = OPC_SRA,
250 OPC_SRLIW = OPC_SRLI,
251 OPC_SRLW = OPC_SRL,
252 OPC_SUBW = OPC_SUB,
253 #endif
255 OPC_FENCE = 0x0000000f,
256 } RISCVInsn;
258 /*
259 * RISC-V immediate and instruction encoders (excludes 16-bit RVC)
260 */
262 /* Type-R */
264 static int32_t encode_r(RISCVInsn opc, TCGReg rd, TCGReg rs1, TCGReg rs2)
265 {
266 return opc | (rd & 0x1f) << 7 | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20;
267 }
269 /* Type-I */
271 static int32_t encode_imm12(uint32_t imm)
272 {
273 return (imm & 0xfff) << 20;
274 }
276 static int32_t encode_i(RISCVInsn opc, TCGReg rd, TCGReg rs1, uint32_t imm)
277 {
278 return opc | (rd & 0x1f) << 7 | (rs1 & 0x1f) << 15 | encode_imm12(imm);
279 }
281 /* Type-S */
283 static int32_t encode_simm12(uint32_t imm)
284 {
285 int32_t ret = 0;
287 ret |= (imm & 0xFE0) << 20;
288 ret |= (imm & 0x1F) << 7;
290 return ret;
291 }
293 static int32_t encode_s(RISCVInsn opc, TCGReg rs1, TCGReg rs2, uint32_t imm)
294 {
295 return opc | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20 | encode_simm12(imm);
296 }
298 /* Type-SB */
300 static int32_t encode_sbimm12(uint32_t imm)
301 {
302 int32_t ret = 0;
304 ret |= (imm & 0x1000) << 19;
305 ret |= (imm & 0x7e0) << 20;
306 ret |= (imm & 0x1e) << 7;
307 ret |= (imm & 0x800) >> 4;
309 return ret;
310 }
312 static int32_t encode_sb(RISCVInsn opc, TCGReg rs1, TCGReg rs2, uint32_t imm)
313 {
314 return opc | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20 | encode_sbimm12(imm);
315 }
317 /* Type-U */
319 static int32_t encode_uimm20(uint32_t imm)
320 {
321 return imm & 0xfffff000;
322 }
324 static int32_t encode_u(RISCVInsn opc, TCGReg rd, uint32_t imm)
325 {
326 return opc | (rd & 0x1f) << 7 | encode_uimm20(imm);
327 }
329 /* Type-UJ */
331 static int32_t encode_ujimm20(uint32_t imm)
332 {
333 int32_t ret = 0;
335 ret |= (imm & 0x0007fe) << (21 - 1);
336 ret |= (imm & 0x000800) << (20 - 11);
337 ret |= (imm & 0x0ff000) << (12 - 12);
338 ret |= (imm & 0x100000) << (31 - 20);
340 return ret;
341 }
343 static int32_t encode_uj(RISCVInsn opc, TCGReg rd, uint32_t imm)
344 {
345 return opc | (rd & 0x1f) << 7 | encode_ujimm20(imm);
346 }
348 /*
349 * RISC-V instruction emitters
350 */
352 static void tcg_out_opc_reg(TCGContext *s, RISCVInsn opc,
353 TCGReg rd, TCGReg rs1, TCGReg rs2)
354 {
355 tcg_out32(s, encode_r(opc, rd, rs1, rs2));
356 }
358 static void tcg_out_opc_imm(TCGContext *s, RISCVInsn opc,
359 TCGReg rd, TCGReg rs1, TCGArg imm)
360 {
361 tcg_out32(s, encode_i(opc, rd, rs1, imm));
362 }
364 static void tcg_out_opc_store(TCGContext *s, RISCVInsn opc,
365 TCGReg rs1, TCGReg rs2, uint32_t imm)
366 {
367 tcg_out32(s, encode_s(opc, rs1, rs2, imm));
368 }
370 static void tcg_out_opc_branch(TCGContext *s, RISCVInsn opc,
371 TCGReg rs1, TCGReg rs2, uint32_t imm)
372 {
373 tcg_out32(s, encode_sb(opc, rs1, rs2, imm));
374 }
376 static void tcg_out_opc_upper(TCGContext *s, RISCVInsn opc,
377 TCGReg rd, uint32_t imm)
378 {
379 tcg_out32(s, encode_u(opc, rd, imm));
380 }
382 static void tcg_out_opc_jump(TCGContext *s, RISCVInsn opc,
383 TCGReg rd, uint32_t imm)
384 {
385 tcg_out32(s, encode_uj(opc, rd, imm));
386 }
388 static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
389 {
390 int i;
391 for (i = 0; i < count; ++i) {
392 p[i] = encode_i(OPC_ADDI, TCG_REG_ZERO, TCG_REG_ZERO, 0);
393 }
394 }
396 /*
397 * Relocations
398 */
400 static bool reloc_sbimm12(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
401 {
402 const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
403 intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
405 tcg_debug_assert((offset & 1) == 0);
406 if (offset == sextreg(offset, 0, 12)) {
407 *src_rw |= encode_sbimm12(offset);
408 return true;
409 }
411 return false;
412 }
414 static bool reloc_jimm20(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
415 {
416 const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
417 intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
419 tcg_debug_assert((offset & 1) == 0);
420 if (offset == sextreg(offset, 0, 20)) {
421 *src_rw |= encode_ujimm20(offset);
422 return true;
423 }
425 return false;
426 }
428 static bool reloc_call(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
429 {
430 const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
431 intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
432 int32_t lo = sextreg(offset, 0, 12);
433 int32_t hi = offset - lo;
435 if (offset == hi + lo) {
436 src_rw[0] |= encode_uimm20(hi);
437 src_rw[1] |= encode_imm12(lo);
438 return true;
439 }
441 return false;
442 }
444 static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
445 intptr_t value, intptr_t addend)
446 {
447 tcg_debug_assert(addend == 0);
448 switch (type) {
449 case R_RISCV_BRANCH:
450 return reloc_sbimm12(code_ptr, (tcg_insn_unit *)value);
451 case R_RISCV_JAL:
452 return reloc_jimm20(code_ptr, (tcg_insn_unit *)value);
453 case R_RISCV_CALL:
454 return reloc_call(code_ptr, (tcg_insn_unit *)value);
455 default:
456 g_assert_not_reached();
457 }
458 }
460 /*
461 * TCG intrinsics
462 */
464 static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg)
465 {
466 if (ret == arg) {
467 return true;
468 }
469 switch (type) {
470 case TCG_TYPE_I32:
471 case TCG_TYPE_I64:
472 tcg_out_opc_imm(s, OPC_ADDI, ret, arg, 0);
473 break;
474 default:
475 g_assert_not_reached();
476 }
477 return true;
478 }
480 static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd,
481 tcg_target_long val)
482 {
483 tcg_target_long lo, hi, tmp;
484 int shift, ret;
486 if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) {
487 val = (int32_t)val;
488 }
490 lo = sextreg(val, 0, 12);
491 if (val == lo) {
492 tcg_out_opc_imm(s, OPC_ADDI, rd, TCG_REG_ZERO, lo);
493 return;
494 }
496 hi = val - lo;
497 if (TCG_TARGET_REG_BITS == 32 || val == (int32_t)val) {
498 tcg_out_opc_upper(s, OPC_LUI, rd, hi);
499 if (lo != 0) {
500 tcg_out_opc_imm(s, OPC_ADDIW, rd, rd, lo);
501 }
502 return;
503 }
505 /* We can only be here if TCG_TARGET_REG_BITS != 32 */
506 tmp = tcg_pcrel_diff(s, (void *)val);
507 if (tmp == (int32_t)tmp) {
508 tcg_out_opc_upper(s, OPC_AUIPC, rd, 0);
509 tcg_out_opc_imm(s, OPC_ADDI, rd, rd, 0);
510 ret = reloc_call(s->code_ptr - 2, (const tcg_insn_unit *)val);
511 tcg_debug_assert(ret == true);
512 return;
513 }
515 /* Look for a single 20-bit section. */
516 shift = ctz64(val);
517 tmp = val >> shift;
518 if (tmp == sextreg(tmp, 0, 20)) {
519 tcg_out_opc_upper(s, OPC_LUI, rd, tmp << 12);
520 if (shift > 12) {
521 tcg_out_opc_imm(s, OPC_SLLI, rd, rd, shift - 12);
522 } else {
523 tcg_out_opc_imm(s, OPC_SRAI, rd, rd, 12 - shift);
524 }
525 return;
526 }
528 /* Look for a few high zero bits, with lots of bits set in the middle. */
529 shift = clz64(val);
530 tmp = val << shift;
531 if (tmp == sextreg(tmp, 12, 20) << 12) {
532 tcg_out_opc_upper(s, OPC_LUI, rd, tmp);
533 tcg_out_opc_imm(s, OPC_SRLI, rd, rd, shift);
534 return;
535 } else if (tmp == sextreg(tmp, 0, 12)) {
536 tcg_out_opc_imm(s, OPC_ADDI, rd, TCG_REG_ZERO, tmp);
537 tcg_out_opc_imm(s, OPC_SRLI, rd, rd, shift);
538 return;
539 }
541 /* Drop into the constant pool. */
542 new_pool_label(s, val, R_RISCV_CALL, s->code_ptr, 0);
543 tcg_out_opc_upper(s, OPC_AUIPC, rd, 0);
544 tcg_out_opc_imm(s, OPC_LD, rd, rd, 0);
545 }
547 static void tcg_out_ext8u(TCGContext *s, TCGReg ret, TCGReg arg)
548 {
549 tcg_out_opc_imm(s, OPC_ANDI, ret, arg, 0xff);
550 }
552 static void tcg_out_ext16u(TCGContext *s, TCGReg ret, TCGReg arg)
553 {
554 tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 16);
555 tcg_out_opc_imm(s, OPC_SRLIW, ret, ret, 16);
556 }
558 static void tcg_out_ext32u(TCGContext *s, TCGReg ret, TCGReg arg)
559 {
560 tcg_out_opc_imm(s, OPC_SLLI, ret, arg, 32);
561 tcg_out_opc_imm(s, OPC_SRLI, ret, ret, 32);
562 }
564 static void tcg_out_ext8s(TCGContext *s, TCGReg ret, TCGReg arg)
565 {
566 tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 24);
567 tcg_out_opc_imm(s, OPC_SRAIW, ret, ret, 24);
568 }
570 static void tcg_out_ext16s(TCGContext *s, TCGReg ret, TCGReg arg)
571 {
572 tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 16);
573 tcg_out_opc_imm(s, OPC_SRAIW, ret, ret, 16);
574 }
576 static void tcg_out_ext32s(TCGContext *s, TCGReg ret, TCGReg arg)
577 {
578 tcg_out_opc_imm(s, OPC_ADDIW, ret, arg, 0);
579 }
581 static void tcg_out_ldst(TCGContext *s, RISCVInsn opc, TCGReg data,
582 TCGReg addr, intptr_t offset)
583 {
584 intptr_t imm12 = sextreg(offset, 0, 12);
586 if (offset != imm12) {
587 intptr_t diff = offset - (uintptr_t)s->code_ptr;
589 if (addr == TCG_REG_ZERO && diff == (int32_t)diff) {
590 imm12 = sextreg(diff, 0, 12);
591 tcg_out_opc_upper(s, OPC_AUIPC, TCG_REG_TMP2, diff - imm12);
592 } else {
593 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP2, offset - imm12);
594 if (addr != TCG_REG_ZERO) {
595 tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP2, TCG_REG_TMP2, addr);
596 }
597 }
598 addr = TCG_REG_TMP2;
599 }
601 switch (opc) {
602 case OPC_SB:
603 case OPC_SH:
604 case OPC_SW:
605 case OPC_SD:
606 tcg_out_opc_store(s, opc, addr, data, imm12);
607 break;
608 case OPC_LB:
609 case OPC_LBU:
610 case OPC_LH:
611 case OPC_LHU:
612 case OPC_LW:
613 case OPC_LWU:
614 case OPC_LD:
615 tcg_out_opc_imm(s, opc, data, addr, imm12);
616 break;
617 default:
618 g_assert_not_reached();
619 }
620 }
622 static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg,
623 TCGReg arg1, intptr_t arg2)
624 {
625 bool is32bit = (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32);
626 tcg_out_ldst(s, is32bit ? OPC_LW : OPC_LD, arg, arg1, arg2);
627 }
629 static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg,
630 TCGReg arg1, intptr_t arg2)
631 {
632 bool is32bit = (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32);
633 tcg_out_ldst(s, is32bit ? OPC_SW : OPC_SD, arg, arg1, arg2);
634 }
636 static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val,
637 TCGReg base, intptr_t ofs)
638 {
639 if (val == 0) {
640 tcg_out_st(s, type, TCG_REG_ZERO, base, ofs);
641 return true;
642 }
643 return false;
644 }
646 static void tcg_out_addsub2(TCGContext *s,
647 TCGReg rl, TCGReg rh,
648 TCGReg al, TCGReg ah,
649 TCGArg bl, TCGArg bh,
650 bool cbl, bool cbh, bool is_sub, bool is32bit)
651 {
652 const RISCVInsn opc_add = is32bit ? OPC_ADDW : OPC_ADD;
653 const RISCVInsn opc_addi = is32bit ? OPC_ADDIW : OPC_ADDI;
654 const RISCVInsn opc_sub = is32bit ? OPC_SUBW : OPC_SUB;
655 TCGReg th = TCG_REG_TMP1;
657 /* If we have a negative constant such that negating it would
658 make the high part zero, we can (usually) eliminate one insn. */
659 if (cbl && cbh && bh == -1 && bl != 0) {
660 bl = -bl;
661 bh = 0;
662 is_sub = !is_sub;
663 }
665 /* By operating on the high part first, we get to use the final
666 carry operation to move back from the temporary. */
667 if (!cbh) {
668 tcg_out_opc_reg(s, (is_sub ? opc_sub : opc_add), th, ah, bh);
669 } else if (bh != 0 || ah == rl) {
670 tcg_out_opc_imm(s, opc_addi, th, ah, (is_sub ? -bh : bh));
671 } else {
672 th = ah;
673 }
675 /* Note that tcg optimization should eliminate the bl == 0 case. */
676 if (is_sub) {
677 if (cbl) {
678 tcg_out_opc_imm(s, OPC_SLTIU, TCG_REG_TMP0, al, bl);
679 tcg_out_opc_imm(s, opc_addi, rl, al, -bl);
680 } else {
681 tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_TMP0, al, bl);
682 tcg_out_opc_reg(s, opc_sub, rl, al, bl);
683 }
684 tcg_out_opc_reg(s, opc_sub, rh, th, TCG_REG_TMP0);
685 } else {
686 if (cbl) {
687 tcg_out_opc_imm(s, opc_addi, rl, al, bl);
688 tcg_out_opc_imm(s, OPC_SLTIU, TCG_REG_TMP0, rl, bl);
689 } else if (rl == al && rl == bl) {
690 tcg_out_opc_imm(s, OPC_SLTI, TCG_REG_TMP0, al, 0);
691 tcg_out_opc_reg(s, opc_addi, rl, al, bl);
692 } else {
693 tcg_out_opc_reg(s, opc_add, rl, al, bl);
694 tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_TMP0,
695 rl, (rl == bl ? al : bl));
696 }
697 tcg_out_opc_reg(s, opc_add, rh, th, TCG_REG_TMP0);
698 }
699 }
701 static const struct {
702 RISCVInsn op;
703 bool swap;
704 } tcg_brcond_to_riscv[] = {
705 [TCG_COND_EQ] = { OPC_BEQ, false },
706 [TCG_COND_NE] = { OPC_BNE, false },
707 [TCG_COND_LT] = { OPC_BLT, false },
708 [TCG_COND_GE] = { OPC_BGE, false },
709 [TCG_COND_LE] = { OPC_BGE, true },
710 [TCG_COND_GT] = { OPC_BLT, true },
711 [TCG_COND_LTU] = { OPC_BLTU, false },
712 [TCG_COND_GEU] = { OPC_BGEU, false },
713 [TCG_COND_LEU] = { OPC_BGEU, true },
714 [TCG_COND_GTU] = { OPC_BLTU, true }
715 };
717 static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1,
718 TCGReg arg2, TCGLabel *l)
719 {
720 RISCVInsn op = tcg_brcond_to_riscv[cond].op;
722 tcg_debug_assert(op != 0);
724 if (tcg_brcond_to_riscv[cond].swap) {
725 TCGReg t = arg1;
726 arg1 = arg2;
727 arg2 = t;
728 }
730 tcg_out_reloc(s, s->code_ptr, R_RISCV_BRANCH, l, 0);
731 tcg_out_opc_branch(s, op, arg1, arg2, 0);
732 }
734 static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret,
735 TCGReg arg1, TCGReg arg2)
736 {
737 switch (cond) {
738 case TCG_COND_EQ:
739 tcg_out_opc_reg(s, OPC_SUB, ret, arg1, arg2);
740 tcg_out_opc_imm(s, OPC_SLTIU, ret, ret, 1);
741 break;
742 case TCG_COND_NE:
743 tcg_out_opc_reg(s, OPC_SUB, ret, arg1, arg2);
744 tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, ret);
745 break;
746 case TCG_COND_LT:
747 tcg_out_opc_reg(s, OPC_SLT, ret, arg1, arg2);
748 break;
749 case TCG_COND_GE:
750 tcg_out_opc_reg(s, OPC_SLT, ret, arg1, arg2);
751 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1);
752 break;
753 case TCG_COND_LE:
754 tcg_out_opc_reg(s, OPC_SLT, ret, arg2, arg1);
755 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1);
756 break;
757 case TCG_COND_GT:
758 tcg_out_opc_reg(s, OPC_SLT, ret, arg2, arg1);
759 break;
760 case TCG_COND_LTU:
761 tcg_out_opc_reg(s, OPC_SLTU, ret, arg1, arg2);
762 break;
763 case TCG_COND_GEU:
764 tcg_out_opc_reg(s, OPC_SLTU, ret, arg1, arg2);
765 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1);
766 break;
767 case TCG_COND_LEU:
768 tcg_out_opc_reg(s, OPC_SLTU, ret, arg2, arg1);
769 tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1);
770 break;
771 case TCG_COND_GTU:
772 tcg_out_opc_reg(s, OPC_SLTU, ret, arg2, arg1);
773 break;
774 default:
775 g_assert_not_reached();
776 break;
777 }
778 }
780 static void tcg_out_brcond2(TCGContext *s, TCGCond cond, TCGReg al, TCGReg ah,
781 TCGReg bl, TCGReg bh, TCGLabel *l)
782 {
783 /* todo */
784 g_assert_not_reached();
785 }
787 static void tcg_out_setcond2(TCGContext *s, TCGCond cond, TCGReg ret,
788 TCGReg al, TCGReg ah, TCGReg bl, TCGReg bh)
789 {
790 /* todo */
791 g_assert_not_reached();
792 }
794 static void tcg_out_call_int(TCGContext *s, const tcg_insn_unit *arg, bool tail)
795 {
796 TCGReg link = tail ? TCG_REG_ZERO : TCG_REG_RA;
797 ptrdiff_t offset = tcg_pcrel_diff(s, arg);
798 int ret;
800 tcg_debug_assert((offset & 1) == 0);
801 if (offset == sextreg(offset, 0, 20)) {
802 /* short jump: -2097150 to 2097152 */
803 tcg_out_opc_jump(s, OPC_JAL, link, offset);
804 } else if (TCG_TARGET_REG_BITS == 32 || offset == (int32_t)offset) {
805 /* long jump: -2147483646 to 2147483648 */
806 tcg_out_opc_upper(s, OPC_AUIPC, TCG_REG_TMP0, 0);
807 tcg_out_opc_imm(s, OPC_JALR, link, TCG_REG_TMP0, 0);
808 ret = reloc_call(s->code_ptr - 2, arg);
809 tcg_debug_assert(ret == true);
810 } else if (TCG_TARGET_REG_BITS == 64) {
811 /* far jump: 64-bit */
812 tcg_target_long imm = sextreg((tcg_target_long)arg, 0, 12);
813 tcg_target_long base = (tcg_target_long)arg - imm;
814 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP0, base);
815 tcg_out_opc_imm(s, OPC_JALR, link, TCG_REG_TMP0, imm);
816 } else {
817 g_assert_not_reached();
818 }
819 }
821 static void tcg_out_call(TCGContext *s, const tcg_insn_unit *arg)
822 {
823 tcg_out_call_int(s, arg, false);
824 }
826 static void tcg_out_mb(TCGContext *s, TCGArg a0)
827 {
828 tcg_insn_unit insn = OPC_FENCE;
830 if (a0 & TCG_MO_LD_LD) {
831 insn |= 0x02200000;
832 }
833 if (a0 & TCG_MO_ST_LD) {
834 insn |= 0x01200000;
835 }
836 if (a0 & TCG_MO_LD_ST) {
837 insn |= 0x02100000;
838 }
839 if (a0 & TCG_MO_ST_ST) {
840 insn |= 0x02200000;
841 }
842 tcg_out32(s, insn);
843 }
845 /*
846 * Load/store and TLB
847 */
849 #if defined(CONFIG_SOFTMMU)
850 #include "../tcg-ldst.c.inc"
852 /* helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr,
853 * TCGMemOpIdx oi, uintptr_t ra)
854 */
855 static void * const qemu_ld_helpers[8] = {
856 [MO_UB] = helper_ret_ldub_mmu,
857 [MO_SB] = helper_ret_ldsb_mmu,
858 #ifdef HOST_WORDS_BIGENDIAN
859 [MO_UW] = helper_be_lduw_mmu,
860 [MO_SW] = helper_be_ldsw_mmu,
861 [MO_UL] = helper_be_ldul_mmu,
862 #if TCG_TARGET_REG_BITS == 64
863 [MO_SL] = helper_be_ldsl_mmu,
864 #endif
865 [MO_Q] = helper_be_ldq_mmu,
866 #else
867 [MO_UW] = helper_le_lduw_mmu,
868 [MO_SW] = helper_le_ldsw_mmu,
869 [MO_UL] = helper_le_ldul_mmu,
870 #if TCG_TARGET_REG_BITS == 64
871 [MO_SL] = helper_le_ldsl_mmu,
872 #endif
873 [MO_Q] = helper_le_ldq_mmu,
874 #endif
875 };
877 /* helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr,
878 * uintxx_t val, TCGMemOpIdx oi,
879 * uintptr_t ra)
880 */
881 static void * const qemu_st_helpers[4] = {
882 [MO_8] = helper_ret_stb_mmu,
883 #ifdef HOST_WORDS_BIGENDIAN
884 [MO_16] = helper_be_stw_mmu,
885 [MO_32] = helper_be_stl_mmu,
886 [MO_64] = helper_be_stq_mmu,
887 #else
888 [MO_16] = helper_le_stw_mmu,
889 [MO_32] = helper_le_stl_mmu,
890 [MO_64] = helper_le_stq_mmu,
891 #endif
892 };
894 /* We don't support oversize guests */
895 QEMU_BUILD_BUG_ON(TCG_TARGET_REG_BITS < TARGET_LONG_BITS);
897 /* We expect to use a 12-bit negative offset from ENV. */
898 QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0);
899 QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -(1 << 11));
901 static void tcg_out_goto(TCGContext *s, const tcg_insn_unit *target)
902 {
903 tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, 0);
904 bool ok = reloc_jimm20(s->code_ptr - 1, target);
905 tcg_debug_assert(ok);
906 }
908 static void tcg_out_tlb_load(TCGContext *s, TCGReg addrl,
909 TCGReg addrh, TCGMemOpIdx oi,
910 tcg_insn_unit **label_ptr, bool is_load)
911 {
912 MemOp opc = get_memop(oi);
913 unsigned s_bits = opc & MO_SIZE;
914 unsigned a_bits = get_alignment_bits(opc);
915 tcg_target_long compare_mask;
916 int mem_index = get_mmuidx(oi);
917 int fast_ofs = TLB_MASK_TABLE_OFS(mem_index);
918 int mask_ofs = fast_ofs + offsetof(CPUTLBDescFast, mask);
919 int table_ofs = fast_ofs + offsetof(CPUTLBDescFast, table);
920 TCGReg mask_base = TCG_AREG0, table_base = TCG_AREG0;
922 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, mask_base, mask_ofs);
923 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP1, table_base, table_ofs);
925 tcg_out_opc_imm(s, OPC_SRLI, TCG_REG_TMP2, addrl,
926 TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS);
927 tcg_out_opc_reg(s, OPC_AND, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP0);
928 tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP1);
930 /* Load the tlb comparator and the addend. */
931 tcg_out_ld(s, TCG_TYPE_TL, TCG_REG_TMP0, TCG_REG_TMP2,
932 is_load ? offsetof(CPUTLBEntry, addr_read)
933 : offsetof(CPUTLBEntry, addr_write));
934 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP2, TCG_REG_TMP2,
935 offsetof(CPUTLBEntry, addend));
937 /* We don't support unaligned accesses. */
938 if (a_bits < s_bits) {
939 a_bits = s_bits;
940 }
941 /* Clear the non-page, non-alignment bits from the address. */
942 compare_mask = (tcg_target_long)TARGET_PAGE_MASK | ((1 << a_bits) - 1);
943 if (compare_mask == sextreg(compare_mask, 0, 12)) {
944 tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_TMP1, addrl, compare_mask);
945 } else {
946 tcg_out_movi(s, TCG_TYPE_TL, TCG_REG_TMP1, compare_mask);
947 tcg_out_opc_reg(s, OPC_AND, TCG_REG_TMP1, TCG_REG_TMP1, addrl);
948 }
950 /* Compare masked address with the TLB entry. */
951 label_ptr[0] = s->code_ptr;
952 tcg_out_opc_branch(s, OPC_BNE, TCG_REG_TMP0, TCG_REG_TMP1, 0);
954 /* TLB Hit - translate address using addend. */
955 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
956 tcg_out_ext32u(s, TCG_REG_TMP0, addrl);
957 addrl = TCG_REG_TMP0;
958 }
959 tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP0, TCG_REG_TMP2, addrl);
960 }
962 static void add_qemu_ldst_label(TCGContext *s, int is_ld, TCGMemOpIdx oi,
963 TCGType ext,
964 TCGReg datalo, TCGReg datahi,
965 TCGReg addrlo, TCGReg addrhi,
966 void *raddr, tcg_insn_unit **label_ptr)
967 {
968 TCGLabelQemuLdst *label = new_ldst_label(s);
970 label->is_ld = is_ld;
971 label->oi = oi;
972 label->type = ext;
973 label->datalo_reg = datalo;
974 label->datahi_reg = datahi;
975 label->addrlo_reg = addrlo;
976 label->addrhi_reg = addrhi;
977 label->raddr = tcg_splitwx_to_rx(raddr);
978 label->label_ptr[0] = label_ptr[0];
979 }
981 static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
982 {
983 TCGMemOpIdx oi = l->oi;
984 MemOp opc = get_memop(oi);
985 TCGReg a0 = tcg_target_call_iarg_regs[0];
986 TCGReg a1 = tcg_target_call_iarg_regs[1];
987 TCGReg a2 = tcg_target_call_iarg_regs[2];
988 TCGReg a3 = tcg_target_call_iarg_regs[3];
990 /* We don't support oversize guests */
991 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) {
992 g_assert_not_reached();
993 }
995 /* resolve label address */
996 if (!reloc_sbimm12(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
997 return false;
998 }
1000 /* call load helper */
1001 tcg_out_mov(s, TCG_TYPE_PTR, a0, TCG_AREG0);
1002 tcg_out_mov(s, TCG_TYPE_PTR, a1, l->addrlo_reg);
1003 tcg_out_movi(s, TCG_TYPE_PTR, a2, oi);
1004 tcg_out_movi(s, TCG_TYPE_PTR, a3, (tcg_target_long)l->raddr);
1006 tcg_out_call(s, qemu_ld_helpers[opc & MO_SSIZE]);
1007 tcg_out_mov(s, (opc & MO_SIZE) == MO_64, l->datalo_reg, a0);
1009 tcg_out_goto(s, l->raddr);
1010 return true;
1011 }
1013 static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
1014 {
1015 TCGMemOpIdx oi = l->oi;
1016 MemOp opc = get_memop(oi);
1017 MemOp s_bits = opc & MO_SIZE;
1018 TCGReg a0 = tcg_target_call_iarg_regs[0];
1019 TCGReg a1 = tcg_target_call_iarg_regs[1];
1020 TCGReg a2 = tcg_target_call_iarg_regs[2];
1021 TCGReg a3 = tcg_target_call_iarg_regs[3];
1022 TCGReg a4 = tcg_target_call_iarg_regs[4];
1024 /* We don't support oversize guests */
1025 if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) {
1026 g_assert_not_reached();
1027 }
1029 /* resolve label address */
1030 if (!reloc_sbimm12(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
1031 return false;
1032 }
1034 /* call store helper */
1035 tcg_out_mov(s, TCG_TYPE_PTR, a0, TCG_AREG0);
1036 tcg_out_mov(s, TCG_TYPE_PTR, a1, l->addrlo_reg);
1037 tcg_out_mov(s, TCG_TYPE_PTR, a2, l->datalo_reg);
1038 switch (s_bits) {
1039 case MO_8:
1040 tcg_out_ext8u(s, a2, a2);
1041 break;
1042 case MO_16:
1043 tcg_out_ext16u(s, a2, a2);
1044 break;
1045 default:
1046 break;
1047 }
1048 tcg_out_movi(s, TCG_TYPE_PTR, a3, oi);
1049 tcg_out_movi(s, TCG_TYPE_PTR, a4, (tcg_target_long)l->raddr);
1051 tcg_out_call(s, qemu_st_helpers[opc & MO_SIZE]);
1053 tcg_out_goto(s, l->raddr);
1054 return true;
1055 }
1056 #endif /* CONFIG_SOFTMMU */
1058 static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg lo, TCGReg hi,
1059 TCGReg base, MemOp opc, bool is_64)
1060 {
1061 /* Byte swapping is left to middle-end expansion. */
1062 tcg_debug_assert((opc & MO_BSWAP) == 0);
1064 switch (opc & (MO_SSIZE)) {
1065 case MO_UB:
1066 tcg_out_opc_imm(s, OPC_LBU, lo, base, 0);
1067 break;
1068 case MO_SB:
1069 tcg_out_opc_imm(s, OPC_LB, lo, base, 0);
1070 break;
1071 case MO_UW:
1072 tcg_out_opc_imm(s, OPC_LHU, lo, base, 0);
1073 break;
1074 case MO_SW:
1075 tcg_out_opc_imm(s, OPC_LH, lo, base, 0);
1076 break;
1077 case MO_UL:
1078 if (TCG_TARGET_REG_BITS == 64 && is_64) {
1079 tcg_out_opc_imm(s, OPC_LWU, lo, base, 0);
1080 break;
1081 }
1082 /* FALLTHRU */
1083 case MO_SL:
1084 tcg_out_opc_imm(s, OPC_LW, lo, base, 0);
1085 break;
1086 case MO_Q:
1087 /* Prefer to load from offset 0 first, but allow for overlap. */
1088 if (TCG_TARGET_REG_BITS == 64) {
1089 tcg_out_opc_imm(s, OPC_LD, lo, base, 0);
1090 } else if (lo != base) {
1091 tcg_out_opc_imm(s, OPC_LW, lo, base, 0);
1092 tcg_out_opc_imm(s, OPC_LW, hi, base, 4);
1093 } else {
1094 tcg_out_opc_imm(s, OPC_LW, hi, base, 4);
1095 tcg_out_opc_imm(s, OPC_LW, lo, base, 0);
1096 }
1097 break;
1098 default:
1099 g_assert_not_reached();
1100 }
1101 }
1103 static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is_64)
1104 {
1105 TCGReg addr_regl, addr_regh __attribute__((unused));
1106 TCGReg data_regl, data_regh;
1107 TCGMemOpIdx oi;
1108 MemOp opc;
1109 #if defined(CONFIG_SOFTMMU)
1110 tcg_insn_unit *label_ptr[1];
1111 #endif
1112 TCGReg base = TCG_REG_TMP0;
1114 data_regl = *args++;
1115 data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0);
1116 addr_regl = *args++;
1117 addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0);
1118 oi = *args++;
1119 opc = get_memop(oi);
1121 #if defined(CONFIG_SOFTMMU)
1122 tcg_out_tlb_load(s, addr_regl, addr_regh, oi, label_ptr, 1);
1123 tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64);
1124 add_qemu_ldst_label(s, 1, oi,
1125 (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32),
1126 data_regl, data_regh, addr_regl, addr_regh,
1127 s->code_ptr, label_ptr);
1128 #else
1129 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
1130 tcg_out_ext32u(s, base, addr_regl);
1131 addr_regl = base;
1132 }
1133 if (guest_base != 0) {
1134 tcg_out_opc_reg(s, OPC_ADD, base, TCG_GUEST_BASE_REG, addr_regl);
1135 }
1136 tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64);
1137 #endif
1138 }
1140 static void tcg_out_qemu_st_direct(TCGContext *s, TCGReg lo, TCGReg hi,
1141 TCGReg base, MemOp opc)
1142 {
1143 /* Byte swapping is left to middle-end expansion. */
1144 tcg_debug_assert((opc & MO_BSWAP) == 0);
1146 switch (opc & (MO_SSIZE)) {
1147 case MO_8:
1148 tcg_out_opc_store(s, OPC_SB, base, lo, 0);
1149 break;
1150 case MO_16:
1151 tcg_out_opc_store(s, OPC_SH, base, lo, 0);
1152 break;
1153 case MO_32:
1154 tcg_out_opc_store(s, OPC_SW, base, lo, 0);
1155 break;
1156 case MO_64:
1157 if (TCG_TARGET_REG_BITS == 64) {
1158 tcg_out_opc_store(s, OPC_SD, base, lo, 0);
1159 } else {
1160 tcg_out_opc_store(s, OPC_SW, base, lo, 0);
1161 tcg_out_opc_store(s, OPC_SW, base, hi, 4);
1162 }
1163 break;
1164 default:
1165 g_assert_not_reached();
1166 }
1167 }
1169 static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64)
1170 {
1171 TCGReg addr_regl, addr_regh __attribute__((unused));
1172 TCGReg data_regl, data_regh;
1173 TCGMemOpIdx oi;
1174 MemOp opc;
1175 #if defined(CONFIG_SOFTMMU)
1176 tcg_insn_unit *label_ptr[1];
1177 #endif
1178 TCGReg base = TCG_REG_TMP0;
1180 data_regl = *args++;
1181 data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0);
1182 addr_regl = *args++;
1183 addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0);
1184 oi = *args++;
1185 opc = get_memop(oi);
1187 #if defined(CONFIG_SOFTMMU)
1188 tcg_out_tlb_load(s, addr_regl, addr_regh, oi, label_ptr, 0);
1189 tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc);
1190 add_qemu_ldst_label(s, 0, oi,
1191 (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32),
1192 data_regl, data_regh, addr_regl, addr_regh,
1193 s->code_ptr, label_ptr);
1194 #else
1195 if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
1196 tcg_out_ext32u(s, base, addr_regl);
1197 addr_regl = base;
1198 }
1199 if (guest_base != 0) {
1200 tcg_out_opc_reg(s, OPC_ADD, base, TCG_GUEST_BASE_REG, addr_regl);
1201 }
1202 tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc);
1203 #endif
1204 }
1206 static const tcg_insn_unit *tb_ret_addr;
1208 static void tcg_out_op(TCGContext *s, TCGOpcode opc,
1209 const TCGArg args[TCG_MAX_OP_ARGS],
1210 const int const_args[TCG_MAX_OP_ARGS])
1211 {
1212 TCGArg a0 = args[0];
1213 TCGArg a1 = args[1];
1214 TCGArg a2 = args[2];
1215 int c2 = const_args[2];
1217 switch (opc) {
1218 case INDEX_op_exit_tb:
1219 /* Reuse the zeroing that exists for goto_ptr. */
1220 if (a0 == 0) {
1221 tcg_out_call_int(s, tcg_code_gen_epilogue, true);
1222 } else {
1223 tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A0, a0);
1224 tcg_out_call_int(s, tb_ret_addr, true);
1225 }
1226 break;
1228 case INDEX_op_goto_tb:
1229 assert(s->tb_jmp_insn_offset == 0);
1230 /* indirect jump method */
1231 tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_REG_ZERO,
1232 (uintptr_t)(s->tb_jmp_target_addr + a0));
1233 tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_TMP0, 0);
1234 set_jmp_reset_offset(s, a0);
1235 break;
1237 case INDEX_op_goto_ptr:
1238 tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, a0, 0);
1239 break;
1241 case INDEX_op_br:
1242 tcg_out_reloc(s, s->code_ptr, R_RISCV_JAL, arg_label(a0), 0);
1243 tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, 0);
1244 break;
1246 case INDEX_op_ld8u_i32:
1247 case INDEX_op_ld8u_i64:
1248 tcg_out_ldst(s, OPC_LBU, a0, a1, a2);
1249 break;
1250 case INDEX_op_ld8s_i32:
1251 case INDEX_op_ld8s_i64:
1252 tcg_out_ldst(s, OPC_LB, a0, a1, a2);
1253 break;
1254 case INDEX_op_ld16u_i32:
1255 case INDEX_op_ld16u_i64:
1256 tcg_out_ldst(s, OPC_LHU, a0, a1, a2);
1257 break;
1258 case INDEX_op_ld16s_i32:
1259 case INDEX_op_ld16s_i64:
1260 tcg_out_ldst(s, OPC_LH, a0, a1, a2);
1261 break;
1262 case INDEX_op_ld32u_i64:
1263 tcg_out_ldst(s, OPC_LWU, a0, a1, a2);
1264 break;
1265 case INDEX_op_ld_i32:
1266 case INDEX_op_ld32s_i64:
1267 tcg_out_ldst(s, OPC_LW, a0, a1, a2);
1268 break;
1269 case INDEX_op_ld_i64:
1270 tcg_out_ldst(s, OPC_LD, a0, a1, a2);
1271 break;
1273 case INDEX_op_st8_i32:
1274 case INDEX_op_st8_i64:
1275 tcg_out_ldst(s, OPC_SB, a0, a1, a2);
1276 break;
1277 case INDEX_op_st16_i32:
1278 case INDEX_op_st16_i64:
1279 tcg_out_ldst(s, OPC_SH, a0, a1, a2);
1280 break;
1281 case INDEX_op_st_i32:
1282 case INDEX_op_st32_i64:
1283 tcg_out_ldst(s, OPC_SW, a0, a1, a2);
1284 break;
1285 case INDEX_op_st_i64:
1286 tcg_out_ldst(s, OPC_SD, a0, a1, a2);
1287 break;
1289 case INDEX_op_add_i32:
1290 if (c2) {
1291 tcg_out_opc_imm(s, OPC_ADDIW, a0, a1, a2);
1292 } else {
1293 tcg_out_opc_reg(s, OPC_ADDW, a0, a1, a2);
1294 }
1295 break;
1296 case INDEX_op_add_i64:
1297 if (c2) {
1298 tcg_out_opc_imm(s, OPC_ADDI, a0, a1, a2);
1299 } else {
1300 tcg_out_opc_reg(s, OPC_ADD, a0, a1, a2);
1301 }
1302 break;
1304 case INDEX_op_sub_i32:
1305 if (c2) {
1306 tcg_out_opc_imm(s, OPC_ADDIW, a0, a1, -a2);
1307 } else {
1308 tcg_out_opc_reg(s, OPC_SUBW, a0, a1, a2);
1309 }
1310 break;
1311 case INDEX_op_sub_i64:
1312 if (c2) {
1313 tcg_out_opc_imm(s, OPC_ADDI, a0, a1, -a2);
1314 } else {
1315 tcg_out_opc_reg(s, OPC_SUB, a0, a1, a2);
1316 }
1317 break;
1319 case INDEX_op_and_i32:
1320 case INDEX_op_and_i64:
1321 if (c2) {
1322 tcg_out_opc_imm(s, OPC_ANDI, a0, a1, a2);
1323 } else {
1324 tcg_out_opc_reg(s, OPC_AND, a0, a1, a2);
1325 }
1326 break;
1328 case INDEX_op_or_i32:
1329 case INDEX_op_or_i64:
1330 if (c2) {
1331 tcg_out_opc_imm(s, OPC_ORI, a0, a1, a2);
1332 } else {
1333 tcg_out_opc_reg(s, OPC_OR, a0, a1, a2);
1334 }
1335 break;
1337 case INDEX_op_xor_i32:
1338 case INDEX_op_xor_i64:
1339 if (c2) {
1340 tcg_out_opc_imm(s, OPC_XORI, a0, a1, a2);
1341 } else {
1342 tcg_out_opc_reg(s, OPC_XOR, a0, a1, a2);
1343 }
1344 break;
1346 case INDEX_op_not_i32:
1347 case INDEX_op_not_i64:
1348 tcg_out_opc_imm(s, OPC_XORI, a0, a1, -1);
1349 break;
1351 case INDEX_op_neg_i32:
1352 tcg_out_opc_reg(s, OPC_SUBW, a0, TCG_REG_ZERO, a1);
1353 break;
1354 case INDEX_op_neg_i64:
1355 tcg_out_opc_reg(s, OPC_SUB, a0, TCG_REG_ZERO, a1);
1356 break;
1358 case INDEX_op_mul_i32:
1359 tcg_out_opc_reg(s, OPC_MULW, a0, a1, a2);
1360 break;
1361 case INDEX_op_mul_i64:
1362 tcg_out_opc_reg(s, OPC_MUL, a0, a1, a2);
1363 break;
1365 case INDEX_op_div_i32:
1366 tcg_out_opc_reg(s, OPC_DIVW, a0, a1, a2);
1367 break;
1368 case INDEX_op_div_i64:
1369 tcg_out_opc_reg(s, OPC_DIV, a0, a1, a2);
1370 break;
1372 case INDEX_op_divu_i32:
1373 tcg_out_opc_reg(s, OPC_DIVUW, a0, a1, a2);
1374 break;
1375 case INDEX_op_divu_i64:
1376 tcg_out_opc_reg(s, OPC_DIVU, a0, a1, a2);
1377 break;
1379 case INDEX_op_rem_i32:
1380 tcg_out_opc_reg(s, OPC_REMW, a0, a1, a2);
1381 break;
1382 case INDEX_op_rem_i64:
1383 tcg_out_opc_reg(s, OPC_REM, a0, a1, a2);
1384 break;
1386 case INDEX_op_remu_i32:
1387 tcg_out_opc_reg(s, OPC_REMUW, a0, a1, a2);
1388 break;
1389 case INDEX_op_remu_i64:
1390 tcg_out_opc_reg(s, OPC_REMU, a0, a1, a2);
1391 break;
1393 case INDEX_op_shl_i32:
1394 if (c2) {
1395 tcg_out_opc_imm(s, OPC_SLLIW, a0, a1, a2 & 0x1f);
1396 } else {
1397 tcg_out_opc_reg(s, OPC_SLLW, a0, a1, a2);
1398 }
1399 break;
1400 case INDEX_op_shl_i64:
1401 if (c2) {
1402 tcg_out_opc_imm(s, OPC_SLLI, a0, a1, a2 & 0x3f);
1403 } else {
1404 tcg_out_opc_reg(s, OPC_SLL, a0, a1, a2);
1405 }
1406 break;
1408 case INDEX_op_shr_i32:
1409 if (c2) {
1410 tcg_out_opc_imm(s, OPC_SRLIW, a0, a1, a2 & 0x1f);
1411 } else {
1412 tcg_out_opc_reg(s, OPC_SRLW, a0, a1, a2);
1413 }
1414 break;
1415 case INDEX_op_shr_i64:
1416 if (c2) {
1417 tcg_out_opc_imm(s, OPC_SRLI, a0, a1, a2 & 0x3f);
1418 } else {
1419 tcg_out_opc_reg(s, OPC_SRL, a0, a1, a2);
1420 }
1421 break;
1423 case INDEX_op_sar_i32:
1424 if (c2) {
1425 tcg_out_opc_imm(s, OPC_SRAIW, a0, a1, a2 & 0x1f);
1426 } else {
1427 tcg_out_opc_reg(s, OPC_SRAW, a0, a1, a2);
1428 }
1429 break;
1430 case INDEX_op_sar_i64:
1431 if (c2) {
1432 tcg_out_opc_imm(s, OPC_SRAI, a0, a1, a2 & 0x3f);
1433 } else {
1434 tcg_out_opc_reg(s, OPC_SRA, a0, a1, a2);
1435 }
1436 break;
1438 case INDEX_op_add2_i32:
1439 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
1440 const_args[4], const_args[5], false, true);
1441 break;
1442 case INDEX_op_add2_i64:
1443 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
1444 const_args[4], const_args[5], false, false);
1445 break;
1446 case INDEX_op_sub2_i32:
1447 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
1448 const_args[4], const_args[5], true, true);
1449 break;
1450 case INDEX_op_sub2_i64:
1451 tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
1452 const_args[4], const_args[5], true, false);
1453 break;
1455 case INDEX_op_brcond_i32:
1456 case INDEX_op_brcond_i64:
1457 tcg_out_brcond(s, a2, a0, a1, arg_label(args[3]));
1458 break;
1459 case INDEX_op_brcond2_i32:
1460 tcg_out_brcond2(s, args[4], a0, a1, a2, args[3], arg_label(args[5]));
1461 break;
1463 case INDEX_op_setcond_i32:
1464 case INDEX_op_setcond_i64:
1465 tcg_out_setcond(s, args[3], a0, a1, a2);
1466 break;
1467 case INDEX_op_setcond2_i32:
1468 tcg_out_setcond2(s, args[5], a0, a1, a2, args[3], args[4]);
1469 break;
1471 case INDEX_op_qemu_ld_i32:
1472 tcg_out_qemu_ld(s, args, false);
1473 break;
1474 case INDEX_op_qemu_ld_i64:
1475 tcg_out_qemu_ld(s, args, true);
1476 break;
1477 case INDEX_op_qemu_st_i32:
1478 tcg_out_qemu_st(s, args, false);
1479 break;
1480 case INDEX_op_qemu_st_i64:
1481 tcg_out_qemu_st(s, args, true);
1482 break;
1484 case INDEX_op_ext8u_i32:
1485 case INDEX_op_ext8u_i64:
1486 tcg_out_ext8u(s, a0, a1);
1487 break;
1489 case INDEX_op_ext16u_i32:
1490 case INDEX_op_ext16u_i64:
1491 tcg_out_ext16u(s, a0, a1);
1492 break;
1494 case INDEX_op_ext32u_i64:
1495 case INDEX_op_extu_i32_i64:
1496 tcg_out_ext32u(s, a0, a1);
1497 break;
1499 case INDEX_op_ext8s_i32:
1500 case INDEX_op_ext8s_i64:
1501 tcg_out_ext8s(s, a0, a1);
1502 break;
1504 case INDEX_op_ext16s_i32:
1505 case INDEX_op_ext16s_i64:
1506 tcg_out_ext16s(s, a0, a1);
1507 break;
1509 case INDEX_op_ext32s_i64:
1510 case INDEX_op_extrl_i64_i32:
1511 case INDEX_op_ext_i32_i64:
1512 tcg_out_ext32s(s, a0, a1);
1513 break;
1515 case INDEX_op_extrh_i64_i32:
1516 tcg_out_opc_imm(s, OPC_SRAI, a0, a1, 32);
1517 break;
1519 case INDEX_op_mulsh_i32:
1520 case INDEX_op_mulsh_i64:
1521 tcg_out_opc_reg(s, OPC_MULH, a0, a1, a2);
1522 break;
1524 case INDEX_op_muluh_i32:
1525 case INDEX_op_muluh_i64:
1526 tcg_out_opc_reg(s, OPC_MULHU, a0, a1, a2);
1527 break;
1529 case INDEX_op_mb:
1530 tcg_out_mb(s, a0);
1531 break;
1533 case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */
1534 case INDEX_op_mov_i64:
1535 case INDEX_op_call: /* Always emitted via tcg_out_call. */
1536 default:
1537 g_assert_not_reached();
1538 }
1539 }
1541 static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op)
1542 {
1543 switch (op) {
1544 case INDEX_op_goto_ptr:
1545 return C_O0_I1(r);
1547 case INDEX_op_ld8u_i32:
1548 case INDEX_op_ld8s_i32:
1549 case INDEX_op_ld16u_i32:
1550 case INDEX_op_ld16s_i32:
1551 case INDEX_op_ld_i32:
1552 case INDEX_op_not_i32:
1553 case INDEX_op_neg_i32:
1554 case INDEX_op_ld8u_i64:
1555 case INDEX_op_ld8s_i64:
1556 case INDEX_op_ld16u_i64:
1557 case INDEX_op_ld16s_i64:
1558 case INDEX_op_ld32s_i64:
1559 case INDEX_op_ld32u_i64:
1560 case INDEX_op_ld_i64:
1561 case INDEX_op_not_i64:
1562 case INDEX_op_neg_i64:
1563 case INDEX_op_ext8u_i32:
1564 case INDEX_op_ext8u_i64:
1565 case INDEX_op_ext16u_i32:
1566 case INDEX_op_ext16u_i64:
1567 case INDEX_op_ext32u_i64:
1568 case INDEX_op_extu_i32_i64:
1569 case INDEX_op_ext8s_i32:
1570 case INDEX_op_ext8s_i64:
1571 case INDEX_op_ext16s_i32:
1572 case INDEX_op_ext16s_i64:
1573 case INDEX_op_ext32s_i64:
1574 case INDEX_op_extrl_i64_i32:
1575 case INDEX_op_extrh_i64_i32:
1576 case INDEX_op_ext_i32_i64:
1577 return C_O1_I1(r, r);
1579 case INDEX_op_st8_i32:
1580 case INDEX_op_st16_i32:
1581 case INDEX_op_st_i32:
1582 case INDEX_op_st8_i64:
1583 case INDEX_op_st16_i64:
1584 case INDEX_op_st32_i64:
1585 case INDEX_op_st_i64:
1586 return C_O0_I2(rZ, r);
1588 case INDEX_op_add_i32:
1589 case INDEX_op_and_i32:
1590 case INDEX_op_or_i32:
1591 case INDEX_op_xor_i32:
1592 case INDEX_op_add_i64:
1593 case INDEX_op_and_i64:
1594 case INDEX_op_or_i64:
1595 case INDEX_op_xor_i64:
1596 return C_O1_I2(r, r, rI);
1598 case INDEX_op_sub_i32:
1599 case INDEX_op_sub_i64:
1600 return C_O1_I2(r, rZ, rN);
1602 case INDEX_op_mul_i32:
1603 case INDEX_op_mulsh_i32:
1604 case INDEX_op_muluh_i32:
1605 case INDEX_op_div_i32:
1606 case INDEX_op_divu_i32:
1607 case INDEX_op_rem_i32:
1608 case INDEX_op_remu_i32:
1609 case INDEX_op_setcond_i32:
1610 case INDEX_op_mul_i64:
1611 case INDEX_op_mulsh_i64:
1612 case INDEX_op_muluh_i64:
1613 case INDEX_op_div_i64:
1614 case INDEX_op_divu_i64:
1615 case INDEX_op_rem_i64:
1616 case INDEX_op_remu_i64:
1617 case INDEX_op_setcond_i64:
1618 return C_O1_I2(r, rZ, rZ);
1620 case INDEX_op_shl_i32:
1621 case INDEX_op_shr_i32:
1622 case INDEX_op_sar_i32:
1623 case INDEX_op_shl_i64:
1624 case INDEX_op_shr_i64:
1625 case INDEX_op_sar_i64:
1626 return C_O1_I2(r, r, ri);
1628 case INDEX_op_brcond_i32:
1629 case INDEX_op_brcond_i64:
1630 return C_O0_I2(rZ, rZ);
1632 case INDEX_op_add2_i32:
1633 case INDEX_op_add2_i64:
1634 case INDEX_op_sub2_i32:
1635 case INDEX_op_sub2_i64:
1636 return C_O2_I4(r, r, rZ, rZ, rM, rM);
1638 case INDEX_op_brcond2_i32:
1639 return C_O0_I4(rZ, rZ, rZ, rZ);
1641 case INDEX_op_setcond2_i32:
1642 return C_O1_I4(r, rZ, rZ, rZ, rZ);
1644 case INDEX_op_qemu_ld_i32:
1645 return (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS
1646 ? C_O1_I1(r, L) : C_O1_I2(r, L, L));
1647 case INDEX_op_qemu_st_i32:
1648 return (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS
1649 ? C_O0_I2(LZ, L) : C_O0_I3(LZ, L, L));
1650 case INDEX_op_qemu_ld_i64:
1651 return (TCG_TARGET_REG_BITS == 64 ? C_O1_I1(r, L)
1652 : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? C_O2_I1(r, r, L)
1653 : C_O2_I2(r, r, L, L));
1654 case INDEX_op_qemu_st_i64:
1655 return (TCG_TARGET_REG_BITS == 64 ? C_O0_I2(LZ, L)
1656 : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? C_O0_I3(LZ, LZ, L)
1657 : C_O0_I4(LZ, LZ, L, L));
1659 default:
1660 g_assert_not_reached();
1661 }
1662 }
1664 static const int tcg_target_callee_save_regs[] = {
1665 TCG_REG_S0, /* used for the global env (TCG_AREG0) */
1666 TCG_REG_S1,
1667 TCG_REG_S2,
1668 TCG_REG_S3,
1669 TCG_REG_S4,
1670 TCG_REG_S5,
1671 TCG_REG_S6,
1672 TCG_REG_S7,
1673 TCG_REG_S8,
1674 TCG_REG_S9,
1675 TCG_REG_S10,
1676 TCG_REG_S11,
1677 TCG_REG_RA, /* should be last for ABI compliance */
1678 };
1680 /* Stack frame parameters. */
1681 #define REG_SIZE (TCG_TARGET_REG_BITS / 8)
1682 #define SAVE_SIZE ((int)ARRAY_SIZE(tcg_target_callee_save_regs) * REG_SIZE)
1683 #define TEMP_SIZE (CPU_TEMP_BUF_NLONGS * (int)sizeof(long))
1684 #define FRAME_SIZE ((TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE + SAVE_SIZE \
1685 + TCG_TARGET_STACK_ALIGN - 1) \
1686 & -TCG_TARGET_STACK_ALIGN)
1687 #define SAVE_OFS (TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE)
1689 /* We're expecting to be able to use an immediate for frame allocation. */
1690 QEMU_BUILD_BUG_ON(FRAME_SIZE > 0x7ff);
1692 /* Generate global QEMU prologue and epilogue code */
1693 static void tcg_target_qemu_prologue(TCGContext *s)
1694 {
1695 int i;
1697 tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE, TEMP_SIZE);
1699 /* TB prologue */
1700 tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_SP, TCG_REG_SP, -FRAME_SIZE);
1701 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
1702 tcg_out_st(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i],
1703 TCG_REG_SP, SAVE_OFS + i * REG_SIZE);
1704 }
1706 #if !defined(CONFIG_SOFTMMU)
1707 tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base);
1708 tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
1709 #endif
1711 /* Call generated code */
1712 tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
1713 tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, tcg_target_call_iarg_regs[1], 0);
1715 /* Return path for goto_ptr. Set return value to 0 */
1716 tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
1717 tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_A0, TCG_REG_ZERO);
1719 /* TB epilogue */
1720 tb_ret_addr = tcg_splitwx_to_rx(s->code_ptr);
1721 for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
1722 tcg_out_ld(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i],
1723 TCG_REG_SP, SAVE_OFS + i * REG_SIZE);
1724 }
1726 tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_SP, TCG_REG_SP, FRAME_SIZE);
1727 tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_RA, 0);
1728 }
1730 static void tcg_target_init(TCGContext *s)
1731 {
1732 tcg_target_available_regs[TCG_TYPE_I32] = 0xffffffff;
1733 if (TCG_TARGET_REG_BITS == 64) {
1734 tcg_target_available_regs[TCG_TYPE_I64] = 0xffffffff;
1735 }
1737 tcg_target_call_clobber_regs = -1u;
1738 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S0);
1739 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S1);
1740 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S2);
1741 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S3);
1742 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S4);
1743 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S5);
1744 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S6);
1745 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S7);
1746 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S8);
1747 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S9);
1748 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S10);
1749 tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S11);
1751 s->reserved_regs = 0;
1752 tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO);
1753 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP0);
1754 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP1);
1755 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP2);
1756 tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP);
1757 tcg_regset_set_reg(s->reserved_regs, TCG_REG_GP);
1758 tcg_regset_set_reg(s->reserved_regs, TCG_REG_TP);
1759 }
1761 typedef struct {
1762 DebugFrameHeader h;
1763 uint8_t fde_def_cfa[4];
1764 uint8_t fde_reg_ofs[ARRAY_SIZE(tcg_target_callee_save_regs) * 2];
1765 } DebugFrame;
1767 #define ELF_HOST_MACHINE EM_RISCV
1769 static const DebugFrame debug_frame = {
1770 .h.cie.len = sizeof(DebugFrameCIE) - 4, /* length after .len member */
1771 .h.cie.id = -1,
1772 .h.cie.version = 1,
1773 .h.cie.code_align = 1,
1774 .h.cie.data_align = -(TCG_TARGET_REG_BITS / 8) & 0x7f, /* sleb128 */
1775 .h.cie.return_column = TCG_REG_RA,
1777 /* Total FDE size does not include the "len" member. */
1778 .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset),
1780 .fde_def_cfa = {
1781 12, TCG_REG_SP, /* DW_CFA_def_cfa sp, ... */
1782 (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */
1783 (FRAME_SIZE >> 7)
1784 },
1785 .fde_reg_ofs = {
1786 0x80 + 9, 12, /* DW_CFA_offset, s1, -96 */
1787 0x80 + 18, 11, /* DW_CFA_offset, s2, -88 */
1788 0x80 + 19, 10, /* DW_CFA_offset, s3, -80 */
1789 0x80 + 20, 9, /* DW_CFA_offset, s4, -72 */
1790 0x80 + 21, 8, /* DW_CFA_offset, s5, -64 */
1791 0x80 + 22, 7, /* DW_CFA_offset, s6, -56 */
1792 0x80 + 23, 6, /* DW_CFA_offset, s7, -48 */
1793 0x80 + 24, 5, /* DW_CFA_offset, s8, -40 */
1794 0x80 + 25, 4, /* DW_CFA_offset, s9, -32 */
1795 0x80 + 26, 3, /* DW_CFA_offset, s10, -24 */
1796 0x80 + 27, 2, /* DW_CFA_offset, s11, -16 */
1797 0x80 + 1 , 1, /* DW_CFA_offset, ra, -8 */
1798 }
1799 };
1801 void tcg_register_jit(const void *buf, size_t buf_size)
1802 {
1803 tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));
1804 }