1 /* 2 * RISC-V emulation for qemu: main translation routines. 3 * 4 * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2 or later, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * You should have received a copy of the GNU General Public License along with 16 * this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #include "qemu/osdep.h" 20 #include "qemu/log.h" 21 #include "cpu.h" 22 #include "tcg/tcg-op.h" 23 #include "disas/disas.h" 24 #include "exec/cpu_ldst.h" 25 #include "exec/exec-all.h" 26 #include "exec/helper-proto.h" 27 #include "exec/helper-gen.h" 28 29 #include "exec/translator.h" 30 #include "exec/log.h" 31 32 #include "instmap.h" 33 #include "internals.h" 34 35 /* global register indices */ 36 static TCGv cpu_gpr[32], cpu_gprh[32], cpu_pc, cpu_vl, cpu_vstart; 37 static TCGv_i64 cpu_fpr[32]; /* assume F and D extensions */ 38 static TCGv load_res; 39 static TCGv load_val; 40 /* globals for PM CSRs */ 41 static TCGv pm_mask; 42 static TCGv pm_base; 43 44 #include "exec/gen-icount.h" 45 46 /* 47 * If an operation is being performed on less than TARGET_LONG_BITS, 48 * it may require the inputs to be sign- or zero-extended; which will 49 * depend on the exact operation being performed. 50 */ 51 typedef enum { 52 EXT_NONE, 53 EXT_SIGN, 54 EXT_ZERO, 55 } DisasExtend; 56 57 typedef struct DisasContext { 58 DisasContextBase base; 59 /* pc_succ_insn points to the instruction following base.pc_next */ 60 target_ulong pc_succ_insn; 61 target_ulong priv_ver; 62 RISCVMXL misa_mxl_max; 63 RISCVMXL xl; 64 uint32_t misa_ext; 65 uint32_t opcode; 66 uint32_t mstatus_fs; 67 uint32_t mstatus_vs; 68 uint32_t mstatus_hs_fs; 69 uint32_t mstatus_hs_vs; 70 uint32_t mem_idx; 71 /* Remember the rounding mode encoded in the previous fp instruction, 72 which we have already installed into env->fp_status. Or -1 for 73 no previous fp instruction. Note that we exit the TB when writing 74 to any system register, which includes CSR_FRM, so we do not have 75 to reset this known value. */ 76 int frm; 77 RISCVMXL ol; 78 bool virt_enabled; 79 const RISCVCPUConfig *cfg_ptr; 80 bool hlsx; 81 /* vector extension */ 82 bool vill; 83 /* 84 * Encode LMUL to lmul as follows: 85 * LMUL vlmul lmul 86 * 1 000 0 87 * 2 001 1 88 * 4 010 2 89 * 8 011 3 90 * - 100 - 91 * 1/8 101 -3 92 * 1/4 110 -2 93 * 1/2 111 -1 94 */ 95 int8_t lmul; 96 uint8_t sew; 97 target_ulong vstart; 98 bool vl_eq_vlmax; 99 uint8_t ntemp; 100 CPUState *cs; 101 TCGv zero; 102 /* Space for 3 operands plus 1 extra for address computation. */ 103 TCGv temp[4]; 104 /* Space for 4 operands(1 dest and <=3 src) for float point computation */ 105 TCGv_i64 ftemp[4]; 106 uint8_t nftemp; 107 /* PointerMasking extension */ 108 bool pm_mask_enabled; 109 bool pm_base_enabled; 110 } DisasContext; 111 112 static inline bool has_ext(DisasContext *ctx, uint32_t ext) 113 { 114 return ctx->misa_ext & ext; 115 } 116 117 static bool always_true_p(DisasContext *ctx __attribute__((__unused__))) 118 { 119 return true; 120 } 121 122 #define MATERIALISE_EXT_PREDICATE(ext) \ 123 static bool has_ ## ext ## _p(DisasContext *ctx) \ 124 { \ 125 return ctx->cfg_ptr->ext_ ## ext ; \ 126 } 127 128 MATERIALISE_EXT_PREDICATE(XVentanaCondOps); 129 130 #ifdef TARGET_RISCV32 131 #define get_xl(ctx) MXL_RV32 132 #elif defined(CONFIG_USER_ONLY) 133 #define get_xl(ctx) MXL_RV64 134 #else 135 #define get_xl(ctx) ((ctx)->xl) 136 #endif 137 138 /* The word size for this machine mode. */ 139 static inline int __attribute__((unused)) get_xlen(DisasContext *ctx) 140 { 141 return 16 << get_xl(ctx); 142 } 143 144 /* The operation length, as opposed to the xlen. */ 145 #ifdef TARGET_RISCV32 146 #define get_ol(ctx) MXL_RV32 147 #else 148 #define get_ol(ctx) ((ctx)->ol) 149 #endif 150 151 static inline int get_olen(DisasContext *ctx) 152 { 153 return 16 << get_ol(ctx); 154 } 155 156 /* The maximum register length */ 157 #ifdef TARGET_RISCV32 158 #define get_xl_max(ctx) MXL_RV32 159 #else 160 #define get_xl_max(ctx) ((ctx)->misa_mxl_max) 161 #endif 162 163 /* 164 * RISC-V requires NaN-boxing of narrower width floating point values. 165 * This applies when a 32-bit value is assigned to a 64-bit FP register. 166 * For consistency and simplicity, we nanbox results even when the RVD 167 * extension is not present. 168 */ 169 static void gen_nanbox_s(TCGv_i64 out, TCGv_i64 in) 170 { 171 tcg_gen_ori_i64(out, in, MAKE_64BIT_MASK(32, 32)); 172 } 173 174 static void gen_nanbox_h(TCGv_i64 out, TCGv_i64 in) 175 { 176 tcg_gen_ori_i64(out, in, MAKE_64BIT_MASK(16, 48)); 177 } 178 179 /* 180 * A narrow n-bit operation, where n < FLEN, checks that input operands 181 * are correctly Nan-boxed, i.e., all upper FLEN - n bits are 1. 182 * If so, the least-significant bits of the input are used, otherwise the 183 * input value is treated as an n-bit canonical NaN (v2.2 section 9.2). 184 * 185 * Here, the result is always nan-boxed, even the canonical nan. 186 */ 187 static void gen_check_nanbox_h(TCGv_i64 out, TCGv_i64 in) 188 { 189 TCGv_i64 t_max = tcg_const_i64(0xffffffffffff0000ull); 190 TCGv_i64 t_nan = tcg_const_i64(0xffffffffffff7e00ull); 191 192 tcg_gen_movcond_i64(TCG_COND_GEU, out, in, t_max, in, t_nan); 193 tcg_temp_free_i64(t_max); 194 tcg_temp_free_i64(t_nan); 195 } 196 197 static void gen_check_nanbox_s(TCGv_i64 out, TCGv_i64 in) 198 { 199 TCGv_i64 t_max = tcg_constant_i64(0xffffffff00000000ull); 200 TCGv_i64 t_nan = tcg_constant_i64(0xffffffff7fc00000ull); 201 202 tcg_gen_movcond_i64(TCG_COND_GEU, out, in, t_max, in, t_nan); 203 } 204 205 static void gen_set_pc_imm(DisasContext *ctx, target_ulong dest) 206 { 207 if (get_xl(ctx) == MXL_RV32) { 208 dest = (int32_t)dest; 209 } 210 tcg_gen_movi_tl(cpu_pc, dest); 211 } 212 213 static void gen_set_pc(DisasContext *ctx, TCGv dest) 214 { 215 if (get_xl(ctx) == MXL_RV32) { 216 tcg_gen_ext32s_tl(cpu_pc, dest); 217 } else { 218 tcg_gen_mov_tl(cpu_pc, dest); 219 } 220 } 221 222 static void generate_exception(DisasContext *ctx, int excp) 223 { 224 gen_set_pc_imm(ctx, ctx->base.pc_next); 225 gen_helper_raise_exception(cpu_env, tcg_constant_i32(excp)); 226 ctx->base.is_jmp = DISAS_NORETURN; 227 } 228 229 static void generate_exception_mtval(DisasContext *ctx, int excp) 230 { 231 gen_set_pc_imm(ctx, ctx->base.pc_next); 232 tcg_gen_st_tl(cpu_pc, cpu_env, offsetof(CPURISCVState, badaddr)); 233 gen_helper_raise_exception(cpu_env, tcg_constant_i32(excp)); 234 ctx->base.is_jmp = DISAS_NORETURN; 235 } 236 237 static void gen_exception_illegal(DisasContext *ctx) 238 { 239 tcg_gen_st_i32(tcg_constant_i32(ctx->opcode), cpu_env, 240 offsetof(CPURISCVState, bins)); 241 242 generate_exception(ctx, RISCV_EXCP_ILLEGAL_INST); 243 } 244 245 static void gen_exception_inst_addr_mis(DisasContext *ctx) 246 { 247 generate_exception_mtval(ctx, RISCV_EXCP_INST_ADDR_MIS); 248 } 249 250 static void gen_goto_tb(DisasContext *ctx, int n, target_ulong dest) 251 { 252 if (translator_use_goto_tb(&ctx->base, dest)) { 253 tcg_gen_goto_tb(n); 254 gen_set_pc_imm(ctx, dest); 255 tcg_gen_exit_tb(ctx->base.tb, n); 256 } else { 257 gen_set_pc_imm(ctx, dest); 258 tcg_gen_lookup_and_goto_ptr(); 259 } 260 } 261 262 /* 263 * Wrappers for getting reg values. 264 * 265 * The $zero register does not have cpu_gpr[0] allocated -- we supply the 266 * constant zero as a source, and an uninitialized sink as destination. 267 * 268 * Further, we may provide an extension for word operations. 269 */ 270 static TCGv temp_new(DisasContext *ctx) 271 { 272 assert(ctx->ntemp < ARRAY_SIZE(ctx->temp)); 273 return ctx->temp[ctx->ntemp++] = tcg_temp_new(); 274 } 275 276 static TCGv get_gpr(DisasContext *ctx, int reg_num, DisasExtend ext) 277 { 278 TCGv t; 279 280 if (reg_num == 0) { 281 return ctx->zero; 282 } 283 284 switch (get_ol(ctx)) { 285 case MXL_RV32: 286 switch (ext) { 287 case EXT_NONE: 288 break; 289 case EXT_SIGN: 290 t = temp_new(ctx); 291 tcg_gen_ext32s_tl(t, cpu_gpr[reg_num]); 292 return t; 293 case EXT_ZERO: 294 t = temp_new(ctx); 295 tcg_gen_ext32u_tl(t, cpu_gpr[reg_num]); 296 return t; 297 default: 298 g_assert_not_reached(); 299 } 300 break; 301 case MXL_RV64: 302 case MXL_RV128: 303 break; 304 default: 305 g_assert_not_reached(); 306 } 307 return cpu_gpr[reg_num]; 308 } 309 310 static TCGv get_gprh(DisasContext *ctx, int reg_num) 311 { 312 assert(get_xl(ctx) == MXL_RV128); 313 if (reg_num == 0) { 314 return ctx->zero; 315 } 316 return cpu_gprh[reg_num]; 317 } 318 319 static TCGv dest_gpr(DisasContext *ctx, int reg_num) 320 { 321 if (reg_num == 0 || get_olen(ctx) < TARGET_LONG_BITS) { 322 return temp_new(ctx); 323 } 324 return cpu_gpr[reg_num]; 325 } 326 327 static TCGv dest_gprh(DisasContext *ctx, int reg_num) 328 { 329 if (reg_num == 0) { 330 return temp_new(ctx); 331 } 332 return cpu_gprh[reg_num]; 333 } 334 335 static void gen_set_gpr(DisasContext *ctx, int reg_num, TCGv t) 336 { 337 if (reg_num != 0) { 338 switch (get_ol(ctx)) { 339 case MXL_RV32: 340 tcg_gen_ext32s_tl(cpu_gpr[reg_num], t); 341 break; 342 case MXL_RV64: 343 case MXL_RV128: 344 tcg_gen_mov_tl(cpu_gpr[reg_num], t); 345 break; 346 default: 347 g_assert_not_reached(); 348 } 349 350 if (get_xl_max(ctx) == MXL_RV128) { 351 tcg_gen_sari_tl(cpu_gprh[reg_num], cpu_gpr[reg_num], 63); 352 } 353 } 354 } 355 356 static void gen_set_gpri(DisasContext *ctx, int reg_num, target_long imm) 357 { 358 if (reg_num != 0) { 359 switch (get_ol(ctx)) { 360 case MXL_RV32: 361 tcg_gen_movi_tl(cpu_gpr[reg_num], (int32_t)imm); 362 break; 363 case MXL_RV64: 364 case MXL_RV128: 365 tcg_gen_movi_tl(cpu_gpr[reg_num], imm); 366 break; 367 default: 368 g_assert_not_reached(); 369 } 370 371 if (get_xl_max(ctx) == MXL_RV128) { 372 tcg_gen_movi_tl(cpu_gprh[reg_num], -(imm < 0)); 373 } 374 } 375 } 376 377 static void gen_set_gpr128(DisasContext *ctx, int reg_num, TCGv rl, TCGv rh) 378 { 379 assert(get_ol(ctx) == MXL_RV128); 380 if (reg_num != 0) { 381 tcg_gen_mov_tl(cpu_gpr[reg_num], rl); 382 tcg_gen_mov_tl(cpu_gprh[reg_num], rh); 383 } 384 } 385 386 static TCGv_i64 ftemp_new(DisasContext *ctx) 387 { 388 assert(ctx->nftemp < ARRAY_SIZE(ctx->ftemp)); 389 return ctx->ftemp[ctx->nftemp++] = tcg_temp_new_i64(); 390 } 391 392 static TCGv_i64 get_fpr_hs(DisasContext *ctx, int reg_num) 393 { 394 if (!ctx->cfg_ptr->ext_zfinx) { 395 return cpu_fpr[reg_num]; 396 } 397 398 if (reg_num == 0) { 399 return tcg_constant_i64(0); 400 } 401 switch (get_xl(ctx)) { 402 case MXL_RV32: 403 #ifdef TARGET_RISCV32 404 { 405 TCGv_i64 t = ftemp_new(ctx); 406 tcg_gen_ext_i32_i64(t, cpu_gpr[reg_num]); 407 return t; 408 } 409 #else 410 /* fall through */ 411 case MXL_RV64: 412 return cpu_gpr[reg_num]; 413 #endif 414 default: 415 g_assert_not_reached(); 416 } 417 } 418 419 static TCGv_i64 get_fpr_d(DisasContext *ctx, int reg_num) 420 { 421 if (!ctx->cfg_ptr->ext_zfinx) { 422 return cpu_fpr[reg_num]; 423 } 424 425 if (reg_num == 0) { 426 return tcg_constant_i64(0); 427 } 428 switch (get_xl(ctx)) { 429 case MXL_RV32: 430 { 431 TCGv_i64 t = ftemp_new(ctx); 432 tcg_gen_concat_tl_i64(t, cpu_gpr[reg_num], cpu_gpr[reg_num + 1]); 433 return t; 434 } 435 #ifdef TARGET_RISCV64 436 case MXL_RV64: 437 return cpu_gpr[reg_num]; 438 #endif 439 default: 440 g_assert_not_reached(); 441 } 442 } 443 444 static TCGv_i64 dest_fpr(DisasContext *ctx, int reg_num) 445 { 446 if (!ctx->cfg_ptr->ext_zfinx) { 447 return cpu_fpr[reg_num]; 448 } 449 450 if (reg_num == 0) { 451 return ftemp_new(ctx); 452 } 453 454 switch (get_xl(ctx)) { 455 case MXL_RV32: 456 return ftemp_new(ctx); 457 #ifdef TARGET_RISCV64 458 case MXL_RV64: 459 return cpu_gpr[reg_num]; 460 #endif 461 default: 462 g_assert_not_reached(); 463 } 464 } 465 466 /* assume t is nanboxing (for normal) or sign-extended (for zfinx) */ 467 static void gen_set_fpr_hs(DisasContext *ctx, int reg_num, TCGv_i64 t) 468 { 469 if (!ctx->cfg_ptr->ext_zfinx) { 470 tcg_gen_mov_i64(cpu_fpr[reg_num], t); 471 return; 472 } 473 if (reg_num != 0) { 474 switch (get_xl(ctx)) { 475 case MXL_RV32: 476 #ifdef TARGET_RISCV32 477 tcg_gen_extrl_i64_i32(cpu_gpr[reg_num], t); 478 break; 479 #else 480 /* fall through */ 481 case MXL_RV64: 482 tcg_gen_mov_i64(cpu_gpr[reg_num], t); 483 break; 484 #endif 485 default: 486 g_assert_not_reached(); 487 } 488 } 489 } 490 491 static void gen_set_fpr_d(DisasContext *ctx, int reg_num, TCGv_i64 t) 492 { 493 if (!ctx->cfg_ptr->ext_zfinx) { 494 tcg_gen_mov_i64(cpu_fpr[reg_num], t); 495 return; 496 } 497 498 if (reg_num != 0) { 499 switch (get_xl(ctx)) { 500 case MXL_RV32: 501 #ifdef TARGET_RISCV32 502 tcg_gen_extr_i64_i32(cpu_gpr[reg_num], cpu_gpr[reg_num + 1], t); 503 break; 504 #else 505 tcg_gen_ext32s_i64(cpu_gpr[reg_num], t); 506 tcg_gen_sari_i64(cpu_gpr[reg_num + 1], t, 32); 507 break; 508 case MXL_RV64: 509 tcg_gen_mov_i64(cpu_gpr[reg_num], t); 510 break; 511 #endif 512 default: 513 g_assert_not_reached(); 514 } 515 } 516 } 517 518 static void gen_jal(DisasContext *ctx, int rd, target_ulong imm) 519 { 520 target_ulong next_pc; 521 522 /* check misaligned: */ 523 next_pc = ctx->base.pc_next + imm; 524 if (!has_ext(ctx, RVC)) { 525 if ((next_pc & 0x3) != 0) { 526 gen_exception_inst_addr_mis(ctx); 527 return; 528 } 529 } 530 531 gen_set_gpri(ctx, rd, ctx->pc_succ_insn); 532 gen_goto_tb(ctx, 0, ctx->base.pc_next + imm); /* must use this for safety */ 533 ctx->base.is_jmp = DISAS_NORETURN; 534 } 535 536 /* Compute a canonical address from a register plus offset. */ 537 static TCGv get_address(DisasContext *ctx, int rs1, int imm) 538 { 539 TCGv addr = temp_new(ctx); 540 TCGv src1 = get_gpr(ctx, rs1, EXT_NONE); 541 542 tcg_gen_addi_tl(addr, src1, imm); 543 if (ctx->pm_mask_enabled) { 544 tcg_gen_and_tl(addr, addr, pm_mask); 545 } else if (get_xl(ctx) == MXL_RV32) { 546 tcg_gen_ext32u_tl(addr, addr); 547 } 548 if (ctx->pm_base_enabled) { 549 tcg_gen_or_tl(addr, addr, pm_base); 550 } 551 return addr; 552 } 553 554 #ifndef CONFIG_USER_ONLY 555 /* The states of mstatus_fs are: 556 * 0 = disabled, 1 = initial, 2 = clean, 3 = dirty 557 * We will have already diagnosed disabled state, 558 * and need to turn initial/clean into dirty. 559 */ 560 static void mark_fs_dirty(DisasContext *ctx) 561 { 562 TCGv tmp; 563 564 if (!has_ext(ctx, RVF)) { 565 return; 566 } 567 568 if (ctx->mstatus_fs != MSTATUS_FS) { 569 /* Remember the state change for the rest of the TB. */ 570 ctx->mstatus_fs = MSTATUS_FS; 571 572 tmp = tcg_temp_new(); 573 tcg_gen_ld_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus)); 574 tcg_gen_ori_tl(tmp, tmp, MSTATUS_FS); 575 tcg_gen_st_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus)); 576 tcg_temp_free(tmp); 577 } 578 579 if (ctx->virt_enabled && ctx->mstatus_hs_fs != MSTATUS_FS) { 580 /* Remember the stage change for the rest of the TB. */ 581 ctx->mstatus_hs_fs = MSTATUS_FS; 582 583 tmp = tcg_temp_new(); 584 tcg_gen_ld_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus_hs)); 585 tcg_gen_ori_tl(tmp, tmp, MSTATUS_FS); 586 tcg_gen_st_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus_hs)); 587 tcg_temp_free(tmp); 588 } 589 } 590 #else 591 static inline void mark_fs_dirty(DisasContext *ctx) { } 592 #endif 593 594 #ifndef CONFIG_USER_ONLY 595 /* The states of mstatus_vs are: 596 * 0 = disabled, 1 = initial, 2 = clean, 3 = dirty 597 * We will have already diagnosed disabled state, 598 * and need to turn initial/clean into dirty. 599 */ 600 static void mark_vs_dirty(DisasContext *ctx) 601 { 602 TCGv tmp; 603 604 if (ctx->mstatus_vs != MSTATUS_VS) { 605 /* Remember the state change for the rest of the TB. */ 606 ctx->mstatus_vs = MSTATUS_VS; 607 608 tmp = tcg_temp_new(); 609 tcg_gen_ld_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus)); 610 tcg_gen_ori_tl(tmp, tmp, MSTATUS_VS); 611 tcg_gen_st_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus)); 612 tcg_temp_free(tmp); 613 } 614 615 if (ctx->virt_enabled && ctx->mstatus_hs_vs != MSTATUS_VS) { 616 /* Remember the stage change for the rest of the TB. */ 617 ctx->mstatus_hs_vs = MSTATUS_VS; 618 619 tmp = tcg_temp_new(); 620 tcg_gen_ld_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus_hs)); 621 tcg_gen_ori_tl(tmp, tmp, MSTATUS_VS); 622 tcg_gen_st_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus_hs)); 623 tcg_temp_free(tmp); 624 } 625 } 626 #else 627 static inline void mark_vs_dirty(DisasContext *ctx) { } 628 #endif 629 630 static void gen_set_rm(DisasContext *ctx, int rm) 631 { 632 if (ctx->frm == rm) { 633 return; 634 } 635 ctx->frm = rm; 636 637 if (rm == RISCV_FRM_ROD) { 638 gen_helper_set_rod_rounding_mode(cpu_env); 639 return; 640 } 641 642 gen_helper_set_rounding_mode(cpu_env, tcg_constant_i32(rm)); 643 } 644 645 static int ex_plus_1(DisasContext *ctx, int nf) 646 { 647 return nf + 1; 648 } 649 650 #define EX_SH(amount) \ 651 static int ex_shift_##amount(DisasContext *ctx, int imm) \ 652 { \ 653 return imm << amount; \ 654 } 655 EX_SH(1) 656 EX_SH(2) 657 EX_SH(3) 658 EX_SH(4) 659 EX_SH(12) 660 661 #define REQUIRE_EXT(ctx, ext) do { \ 662 if (!has_ext(ctx, ext)) { \ 663 return false; \ 664 } \ 665 } while (0) 666 667 #define REQUIRE_32BIT(ctx) do { \ 668 if (get_xl(ctx) != MXL_RV32) { \ 669 return false; \ 670 } \ 671 } while (0) 672 673 #define REQUIRE_64BIT(ctx) do { \ 674 if (get_xl(ctx) != MXL_RV64) { \ 675 return false; \ 676 } \ 677 } while (0) 678 679 #define REQUIRE_128BIT(ctx) do { \ 680 if (get_xl(ctx) != MXL_RV128) { \ 681 return false; \ 682 } \ 683 } while (0) 684 685 #define REQUIRE_64_OR_128BIT(ctx) do { \ 686 if (get_xl(ctx) == MXL_RV32) { \ 687 return false; \ 688 } \ 689 } while (0) 690 691 static int ex_rvc_register(DisasContext *ctx, int reg) 692 { 693 return 8 + reg; 694 } 695 696 static int ex_rvc_shifti(DisasContext *ctx, int imm) 697 { 698 /* For RV128 a shamt of 0 means a shift by 64. */ 699 return imm ? imm : 64; 700 } 701 702 /* Include the auto-generated decoder for 32 bit insn */ 703 #include "decode-insn32.c.inc" 704 705 static bool gen_logic_imm_fn(DisasContext *ctx, arg_i *a, 706 void (*func)(TCGv, TCGv, target_long)) 707 { 708 TCGv dest = dest_gpr(ctx, a->rd); 709 TCGv src1 = get_gpr(ctx, a->rs1, EXT_NONE); 710 711 func(dest, src1, a->imm); 712 713 if (get_xl(ctx) == MXL_RV128) { 714 TCGv src1h = get_gprh(ctx, a->rs1); 715 TCGv desth = dest_gprh(ctx, a->rd); 716 717 func(desth, src1h, -(a->imm < 0)); 718 gen_set_gpr128(ctx, a->rd, dest, desth); 719 } else { 720 gen_set_gpr(ctx, a->rd, dest); 721 } 722 723 return true; 724 } 725 726 static bool gen_logic(DisasContext *ctx, arg_r *a, 727 void (*func)(TCGv, TCGv, TCGv)) 728 { 729 TCGv dest = dest_gpr(ctx, a->rd); 730 TCGv src1 = get_gpr(ctx, a->rs1, EXT_NONE); 731 TCGv src2 = get_gpr(ctx, a->rs2, EXT_NONE); 732 733 func(dest, src1, src2); 734 735 if (get_xl(ctx) == MXL_RV128) { 736 TCGv src1h = get_gprh(ctx, a->rs1); 737 TCGv src2h = get_gprh(ctx, a->rs2); 738 TCGv desth = dest_gprh(ctx, a->rd); 739 740 func(desth, src1h, src2h); 741 gen_set_gpr128(ctx, a->rd, dest, desth); 742 } else { 743 gen_set_gpr(ctx, a->rd, dest); 744 } 745 746 return true; 747 } 748 749 static bool gen_arith_imm_fn(DisasContext *ctx, arg_i *a, DisasExtend ext, 750 void (*func)(TCGv, TCGv, target_long), 751 void (*f128)(TCGv, TCGv, TCGv, TCGv, target_long)) 752 { 753 TCGv dest = dest_gpr(ctx, a->rd); 754 TCGv src1 = get_gpr(ctx, a->rs1, ext); 755 756 if (get_ol(ctx) < MXL_RV128) { 757 func(dest, src1, a->imm); 758 gen_set_gpr(ctx, a->rd, dest); 759 } else { 760 if (f128 == NULL) { 761 return false; 762 } 763 764 TCGv src1h = get_gprh(ctx, a->rs1); 765 TCGv desth = dest_gprh(ctx, a->rd); 766 767 f128(dest, desth, src1, src1h, a->imm); 768 gen_set_gpr128(ctx, a->rd, dest, desth); 769 } 770 return true; 771 } 772 773 static bool gen_arith_imm_tl(DisasContext *ctx, arg_i *a, DisasExtend ext, 774 void (*func)(TCGv, TCGv, TCGv), 775 void (*f128)(TCGv, TCGv, TCGv, TCGv, TCGv, TCGv)) 776 { 777 TCGv dest = dest_gpr(ctx, a->rd); 778 TCGv src1 = get_gpr(ctx, a->rs1, ext); 779 TCGv src2 = tcg_constant_tl(a->imm); 780 781 if (get_ol(ctx) < MXL_RV128) { 782 func(dest, src1, src2); 783 gen_set_gpr(ctx, a->rd, dest); 784 } else { 785 if (f128 == NULL) { 786 return false; 787 } 788 789 TCGv src1h = get_gprh(ctx, a->rs1); 790 TCGv src2h = tcg_constant_tl(-(a->imm < 0)); 791 TCGv desth = dest_gprh(ctx, a->rd); 792 793 f128(dest, desth, src1, src1h, src2, src2h); 794 gen_set_gpr128(ctx, a->rd, dest, desth); 795 } 796 return true; 797 } 798 799 static bool gen_arith(DisasContext *ctx, arg_r *a, DisasExtend ext, 800 void (*func)(TCGv, TCGv, TCGv), 801 void (*f128)(TCGv, TCGv, TCGv, TCGv, TCGv, TCGv)) 802 { 803 TCGv dest = dest_gpr(ctx, a->rd); 804 TCGv src1 = get_gpr(ctx, a->rs1, ext); 805 TCGv src2 = get_gpr(ctx, a->rs2, ext); 806 807 if (get_ol(ctx) < MXL_RV128) { 808 func(dest, src1, src2); 809 gen_set_gpr(ctx, a->rd, dest); 810 } else { 811 if (f128 == NULL) { 812 return false; 813 } 814 815 TCGv src1h = get_gprh(ctx, a->rs1); 816 TCGv src2h = get_gprh(ctx, a->rs2); 817 TCGv desth = dest_gprh(ctx, a->rd); 818 819 f128(dest, desth, src1, src1h, src2, src2h); 820 gen_set_gpr128(ctx, a->rd, dest, desth); 821 } 822 return true; 823 } 824 825 static bool gen_arith_per_ol(DisasContext *ctx, arg_r *a, DisasExtend ext, 826 void (*f_tl)(TCGv, TCGv, TCGv), 827 void (*f_32)(TCGv, TCGv, TCGv), 828 void (*f_128)(TCGv, TCGv, TCGv, TCGv, TCGv, TCGv)) 829 { 830 int olen = get_olen(ctx); 831 832 if (olen != TARGET_LONG_BITS) { 833 if (olen == 32) { 834 f_tl = f_32; 835 } else if (olen != 128) { 836 g_assert_not_reached(); 837 } 838 } 839 return gen_arith(ctx, a, ext, f_tl, f_128); 840 } 841 842 static bool gen_shift_imm_fn(DisasContext *ctx, arg_shift *a, DisasExtend ext, 843 void (*func)(TCGv, TCGv, target_long), 844 void (*f128)(TCGv, TCGv, TCGv, TCGv, target_long)) 845 { 846 TCGv dest, src1; 847 int max_len = get_olen(ctx); 848 849 if (a->shamt >= max_len) { 850 return false; 851 } 852 853 dest = dest_gpr(ctx, a->rd); 854 src1 = get_gpr(ctx, a->rs1, ext); 855 856 if (max_len < 128) { 857 func(dest, src1, a->shamt); 858 gen_set_gpr(ctx, a->rd, dest); 859 } else { 860 TCGv src1h = get_gprh(ctx, a->rs1); 861 TCGv desth = dest_gprh(ctx, a->rd); 862 863 if (f128 == NULL) { 864 return false; 865 } 866 f128(dest, desth, src1, src1h, a->shamt); 867 gen_set_gpr128(ctx, a->rd, dest, desth); 868 } 869 return true; 870 } 871 872 static bool gen_shift_imm_fn_per_ol(DisasContext *ctx, arg_shift *a, 873 DisasExtend ext, 874 void (*f_tl)(TCGv, TCGv, target_long), 875 void (*f_32)(TCGv, TCGv, target_long), 876 void (*f_128)(TCGv, TCGv, TCGv, TCGv, 877 target_long)) 878 { 879 int olen = get_olen(ctx); 880 if (olen != TARGET_LONG_BITS) { 881 if (olen == 32) { 882 f_tl = f_32; 883 } else if (olen != 128) { 884 g_assert_not_reached(); 885 } 886 } 887 return gen_shift_imm_fn(ctx, a, ext, f_tl, f_128); 888 } 889 890 static bool gen_shift_imm_tl(DisasContext *ctx, arg_shift *a, DisasExtend ext, 891 void (*func)(TCGv, TCGv, TCGv)) 892 { 893 TCGv dest, src1, src2; 894 int max_len = get_olen(ctx); 895 896 if (a->shamt >= max_len) { 897 return false; 898 } 899 900 dest = dest_gpr(ctx, a->rd); 901 src1 = get_gpr(ctx, a->rs1, ext); 902 src2 = tcg_constant_tl(a->shamt); 903 904 func(dest, src1, src2); 905 906 gen_set_gpr(ctx, a->rd, dest); 907 return true; 908 } 909 910 static bool gen_shift(DisasContext *ctx, arg_r *a, DisasExtend ext, 911 void (*func)(TCGv, TCGv, TCGv), 912 void (*f128)(TCGv, TCGv, TCGv, TCGv, TCGv)) 913 { 914 TCGv src2 = get_gpr(ctx, a->rs2, EXT_NONE); 915 TCGv ext2 = tcg_temp_new(); 916 int max_len = get_olen(ctx); 917 918 tcg_gen_andi_tl(ext2, src2, max_len - 1); 919 920 TCGv dest = dest_gpr(ctx, a->rd); 921 TCGv src1 = get_gpr(ctx, a->rs1, ext); 922 923 if (max_len < 128) { 924 func(dest, src1, ext2); 925 gen_set_gpr(ctx, a->rd, dest); 926 } else { 927 TCGv src1h = get_gprh(ctx, a->rs1); 928 TCGv desth = dest_gprh(ctx, a->rd); 929 930 if (f128 == NULL) { 931 return false; 932 } 933 f128(dest, desth, src1, src1h, ext2); 934 gen_set_gpr128(ctx, a->rd, dest, desth); 935 } 936 tcg_temp_free(ext2); 937 return true; 938 } 939 940 static bool gen_shift_per_ol(DisasContext *ctx, arg_r *a, DisasExtend ext, 941 void (*f_tl)(TCGv, TCGv, TCGv), 942 void (*f_32)(TCGv, TCGv, TCGv), 943 void (*f_128)(TCGv, TCGv, TCGv, TCGv, TCGv)) 944 { 945 int olen = get_olen(ctx); 946 if (olen != TARGET_LONG_BITS) { 947 if (olen == 32) { 948 f_tl = f_32; 949 } else if (olen != 128) { 950 g_assert_not_reached(); 951 } 952 } 953 return gen_shift(ctx, a, ext, f_tl, f_128); 954 } 955 956 static bool gen_unary(DisasContext *ctx, arg_r2 *a, DisasExtend ext, 957 void (*func)(TCGv, TCGv)) 958 { 959 TCGv dest = dest_gpr(ctx, a->rd); 960 TCGv src1 = get_gpr(ctx, a->rs1, ext); 961 962 func(dest, src1); 963 964 gen_set_gpr(ctx, a->rd, dest); 965 return true; 966 } 967 968 static bool gen_unary_per_ol(DisasContext *ctx, arg_r2 *a, DisasExtend ext, 969 void (*f_tl)(TCGv, TCGv), 970 void (*f_32)(TCGv, TCGv)) 971 { 972 int olen = get_olen(ctx); 973 974 if (olen != TARGET_LONG_BITS) { 975 if (olen == 32) { 976 f_tl = f_32; 977 } else { 978 g_assert_not_reached(); 979 } 980 } 981 return gen_unary(ctx, a, ext, f_tl); 982 } 983 984 static uint32_t opcode_at(DisasContextBase *dcbase, target_ulong pc) 985 { 986 DisasContext *ctx = container_of(dcbase, DisasContext, base); 987 CPUState *cpu = ctx->cs; 988 CPURISCVState *env = cpu->env_ptr; 989 990 return cpu_ldl_code(env, pc); 991 } 992 993 /* Include insn module translation function */ 994 #include "insn_trans/trans_rvi.c.inc" 995 #include "insn_trans/trans_rvm.c.inc" 996 #include "insn_trans/trans_rva.c.inc" 997 #include "insn_trans/trans_rvf.c.inc" 998 #include "insn_trans/trans_rvd.c.inc" 999 #include "insn_trans/trans_rvh.c.inc" 1000 #include "insn_trans/trans_rvv.c.inc" 1001 #include "insn_trans/trans_rvb.c.inc" 1002 #include "insn_trans/trans_rvzfh.c.inc" 1003 #include "insn_trans/trans_privileged.c.inc" 1004 #include "insn_trans/trans_svinval.c.inc" 1005 #include "insn_trans/trans_xventanacondops.c.inc" 1006 1007 /* Include the auto-generated decoder for 16 bit insn */ 1008 #include "decode-insn16.c.inc" 1009 /* Include decoders for factored-out extensions */ 1010 #include "decode-XVentanaCondOps.c.inc" 1011 1012 static void decode_opc(CPURISCVState *env, DisasContext *ctx, uint16_t opcode) 1013 { 1014 /* 1015 * A table with predicate (i.e., guard) functions and decoder functions 1016 * that are tested in-order until a decoder matches onto the opcode. 1017 */ 1018 static const struct { 1019 bool (*guard_func)(DisasContext *); 1020 bool (*decode_func)(DisasContext *, uint32_t); 1021 } decoders[] = { 1022 { always_true_p, decode_insn32 }, 1023 { has_XVentanaCondOps_p, decode_XVentanaCodeOps }, 1024 }; 1025 1026 /* Check for compressed insn */ 1027 if (extract16(opcode, 0, 2) != 3) { 1028 if (!has_ext(ctx, RVC)) { 1029 gen_exception_illegal(ctx); 1030 } else { 1031 ctx->opcode = opcode; 1032 ctx->pc_succ_insn = ctx->base.pc_next + 2; 1033 if (decode_insn16(ctx, opcode)) { 1034 return; 1035 } 1036 } 1037 } else { 1038 uint32_t opcode32 = opcode; 1039 opcode32 = deposit32(opcode32, 16, 16, 1040 translator_lduw(env, &ctx->base, 1041 ctx->base.pc_next + 2)); 1042 ctx->opcode = opcode32; 1043 ctx->pc_succ_insn = ctx->base.pc_next + 4; 1044 1045 for (size_t i = 0; i < ARRAY_SIZE(decoders); ++i) { 1046 if (decoders[i].guard_func(ctx) && 1047 decoders[i].decode_func(ctx, opcode32)) { 1048 return; 1049 } 1050 } 1051 } 1052 1053 gen_exception_illegal(ctx); 1054 } 1055 1056 static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs) 1057 { 1058 DisasContext *ctx = container_of(dcbase, DisasContext, base); 1059 CPURISCVState *env = cs->env_ptr; 1060 RISCVCPU *cpu = RISCV_CPU(cs); 1061 uint32_t tb_flags = ctx->base.tb->flags; 1062 1063 ctx->pc_succ_insn = ctx->base.pc_first; 1064 ctx->mem_idx = FIELD_EX32(tb_flags, TB_FLAGS, MEM_IDX); 1065 ctx->mstatus_fs = tb_flags & TB_FLAGS_MSTATUS_FS; 1066 ctx->mstatus_vs = tb_flags & TB_FLAGS_MSTATUS_VS; 1067 ctx->priv_ver = env->priv_ver; 1068 #if !defined(CONFIG_USER_ONLY) 1069 if (riscv_has_ext(env, RVH)) { 1070 ctx->virt_enabled = riscv_cpu_virt_enabled(env); 1071 } else { 1072 ctx->virt_enabled = false; 1073 } 1074 #else 1075 ctx->virt_enabled = false; 1076 #endif 1077 ctx->misa_ext = env->misa_ext; 1078 ctx->frm = -1; /* unknown rounding mode */ 1079 ctx->cfg_ptr = &(cpu->cfg); 1080 ctx->mstatus_hs_fs = FIELD_EX32(tb_flags, TB_FLAGS, MSTATUS_HS_FS); 1081 ctx->mstatus_hs_vs = FIELD_EX32(tb_flags, TB_FLAGS, MSTATUS_HS_VS); 1082 ctx->hlsx = FIELD_EX32(tb_flags, TB_FLAGS, HLSX); 1083 ctx->vill = FIELD_EX32(tb_flags, TB_FLAGS, VILL); 1084 ctx->sew = FIELD_EX32(tb_flags, TB_FLAGS, SEW); 1085 ctx->lmul = sextract32(FIELD_EX32(tb_flags, TB_FLAGS, LMUL), 0, 3); 1086 ctx->vstart = env->vstart; 1087 ctx->vl_eq_vlmax = FIELD_EX32(tb_flags, TB_FLAGS, VL_EQ_VLMAX); 1088 ctx->misa_mxl_max = env->misa_mxl_max; 1089 ctx->xl = FIELD_EX32(tb_flags, TB_FLAGS, XL); 1090 ctx->cs = cs; 1091 ctx->ntemp = 0; 1092 memset(ctx->temp, 0, sizeof(ctx->temp)); 1093 ctx->nftemp = 0; 1094 memset(ctx->ftemp, 0, sizeof(ctx->ftemp)); 1095 ctx->pm_mask_enabled = FIELD_EX32(tb_flags, TB_FLAGS, PM_MASK_ENABLED); 1096 ctx->pm_base_enabled = FIELD_EX32(tb_flags, TB_FLAGS, PM_BASE_ENABLED); 1097 ctx->zero = tcg_constant_tl(0); 1098 } 1099 1100 static void riscv_tr_tb_start(DisasContextBase *db, CPUState *cpu) 1101 { 1102 } 1103 1104 static void riscv_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu) 1105 { 1106 DisasContext *ctx = container_of(dcbase, DisasContext, base); 1107 1108 tcg_gen_insn_start(ctx->base.pc_next); 1109 } 1110 1111 static void riscv_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu) 1112 { 1113 DisasContext *ctx = container_of(dcbase, DisasContext, base); 1114 CPURISCVState *env = cpu->env_ptr; 1115 uint16_t opcode16 = translator_lduw(env, &ctx->base, ctx->base.pc_next); 1116 int i; 1117 1118 ctx->ol = ctx->xl; 1119 decode_opc(env, ctx, opcode16); 1120 ctx->base.pc_next = ctx->pc_succ_insn; 1121 1122 for (i = ctx->ntemp - 1; i >= 0; --i) { 1123 tcg_temp_free(ctx->temp[i]); 1124 ctx->temp[i] = NULL; 1125 } 1126 ctx->ntemp = 0; 1127 for (i = ctx->nftemp - 1; i >= 0; --i) { 1128 tcg_temp_free_i64(ctx->ftemp[i]); 1129 ctx->ftemp[i] = NULL; 1130 } 1131 ctx->nftemp = 0; 1132 1133 if (ctx->base.is_jmp == DISAS_NEXT) { 1134 target_ulong page_start; 1135 1136 page_start = ctx->base.pc_first & TARGET_PAGE_MASK; 1137 if (ctx->base.pc_next - page_start >= TARGET_PAGE_SIZE) { 1138 ctx->base.is_jmp = DISAS_TOO_MANY; 1139 } 1140 } 1141 } 1142 1143 static void riscv_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu) 1144 { 1145 DisasContext *ctx = container_of(dcbase, DisasContext, base); 1146 1147 switch (ctx->base.is_jmp) { 1148 case DISAS_TOO_MANY: 1149 gen_goto_tb(ctx, 0, ctx->base.pc_next); 1150 break; 1151 case DISAS_NORETURN: 1152 break; 1153 default: 1154 g_assert_not_reached(); 1155 } 1156 } 1157 1158 static void riscv_tr_disas_log(const DisasContextBase *dcbase, 1159 CPUState *cpu, FILE *logfile) 1160 { 1161 #ifndef CONFIG_USER_ONLY 1162 RISCVCPU *rvcpu = RISCV_CPU(cpu); 1163 CPURISCVState *env = &rvcpu->env; 1164 #endif 1165 1166 fprintf(logfile, "IN: %s\n", lookup_symbol(dcbase->pc_first)); 1167 #ifndef CONFIG_USER_ONLY 1168 fprintf(logfile, "Priv: "TARGET_FMT_ld"; Virt: "TARGET_FMT_ld"\n", 1169 env->priv, env->virt); 1170 #endif 1171 target_disas(logfile, cpu, dcbase->pc_first, dcbase->tb->size); 1172 } 1173 1174 static const TranslatorOps riscv_tr_ops = { 1175 .init_disas_context = riscv_tr_init_disas_context, 1176 .tb_start = riscv_tr_tb_start, 1177 .insn_start = riscv_tr_insn_start, 1178 .translate_insn = riscv_tr_translate_insn, 1179 .tb_stop = riscv_tr_tb_stop, 1180 .disas_log = riscv_tr_disas_log, 1181 }; 1182 1183 void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns) 1184 { 1185 DisasContext ctx; 1186 1187 translator_loop(&riscv_tr_ops, &ctx.base, cs, tb, max_insns); 1188 } 1189 1190 void riscv_translate_init(void) 1191 { 1192 int i; 1193 1194 /* 1195 * cpu_gpr[0] is a placeholder for the zero register. Do not use it. 1196 * Use the gen_set_gpr and get_gpr helper functions when accessing regs, 1197 * unless you specifically block reads/writes to reg 0. 1198 */ 1199 cpu_gpr[0] = NULL; 1200 cpu_gprh[0] = NULL; 1201 1202 for (i = 1; i < 32; i++) { 1203 cpu_gpr[i] = tcg_global_mem_new(cpu_env, 1204 offsetof(CPURISCVState, gpr[i]), riscv_int_regnames[i]); 1205 cpu_gprh[i] = tcg_global_mem_new(cpu_env, 1206 offsetof(CPURISCVState, gprh[i]), riscv_int_regnamesh[i]); 1207 } 1208 1209 for (i = 0; i < 32; i++) { 1210 cpu_fpr[i] = tcg_global_mem_new_i64(cpu_env, 1211 offsetof(CPURISCVState, fpr[i]), riscv_fpr_regnames[i]); 1212 } 1213 1214 cpu_pc = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, pc), "pc"); 1215 cpu_vl = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, vl), "vl"); 1216 cpu_vstart = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, vstart), 1217 "vstart"); 1218 load_res = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, load_res), 1219 "load_res"); 1220 load_val = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, load_val), 1221 "load_val"); 1222 /* Assign PM CSRs to tcg globals */ 1223 pm_mask = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, cur_pmmask), 1224 "pmmask"); 1225 pm_base = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, cur_pmbase), 1226 "pmbase"); 1227 } 1228