1 /* 2 * Tiny Code Generator for QEMU 3 * 4 * Copyright (c) 2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #ifndef TCG_H 26 #define TCG_H 27 28 #include "cpu.h" 29 #include "exec/memop.h" 30 #include "qemu/bitops.h" 31 #include "qemu/plugin.h" 32 #include "qemu/queue.h" 33 #include "tcg/tcg-mo.h" 34 #include "tcg-target.h" 35 #include "qemu/int128.h" 36 #include "tcg/tcg-cond.h" 37 38 /* XXX: make safe guess about sizes */ 39 #define MAX_OP_PER_INSTR 266 40 41 #if HOST_LONG_BITS == 32 42 #define MAX_OPC_PARAM_PER_ARG 2 43 #else 44 #define MAX_OPC_PARAM_PER_ARG 1 45 #endif 46 #define MAX_OPC_PARAM_IARGS 6 47 #define MAX_OPC_PARAM_OARGS 1 48 #define MAX_OPC_PARAM_ARGS (MAX_OPC_PARAM_IARGS + MAX_OPC_PARAM_OARGS) 49 50 /* A Call op needs up to 4 + 2N parameters on 32-bit archs, 51 * and up to 4 + N parameters on 64-bit archs 52 * (N = number of input arguments + output arguments). */ 53 #define MAX_OPC_PARAM (4 + (MAX_OPC_PARAM_PER_ARG * MAX_OPC_PARAM_ARGS)) 54 55 #define CPU_TEMP_BUF_NLONGS 128 56 #define TCG_STATIC_FRAME_SIZE (CPU_TEMP_BUF_NLONGS * sizeof(long)) 57 58 /* Default target word size to pointer size. */ 59 #ifndef TCG_TARGET_REG_BITS 60 # if UINTPTR_MAX == UINT32_MAX 61 # define TCG_TARGET_REG_BITS 32 62 # elif UINTPTR_MAX == UINT64_MAX 63 # define TCG_TARGET_REG_BITS 64 64 # else 65 # error Unknown pointer size for tcg target 66 # endif 67 #endif 68 69 #if TCG_TARGET_REG_BITS == 32 70 typedef int32_t tcg_target_long; 71 typedef uint32_t tcg_target_ulong; 72 #define TCG_PRIlx PRIx32 73 #define TCG_PRIld PRId32 74 #elif TCG_TARGET_REG_BITS == 64 75 typedef int64_t tcg_target_long; 76 typedef uint64_t tcg_target_ulong; 77 #define TCG_PRIlx PRIx64 78 #define TCG_PRIld PRId64 79 #else 80 #error unsupported 81 #endif 82 83 /* Oversized TCG guests make things like MTTCG hard 84 * as we can't use atomics for cputlb updates. 85 */ 86 #if TARGET_LONG_BITS > TCG_TARGET_REG_BITS 87 #define TCG_OVERSIZED_GUEST 1 88 #else 89 #define TCG_OVERSIZED_GUEST 0 90 #endif 91 92 #if TCG_TARGET_NB_REGS <= 32 93 typedef uint32_t TCGRegSet; 94 #elif TCG_TARGET_NB_REGS <= 64 95 typedef uint64_t TCGRegSet; 96 #else 97 #error unsupported 98 #endif 99 100 #if TCG_TARGET_REG_BITS == 32 101 /* Turn some undef macros into false macros. */ 102 #define TCG_TARGET_HAS_extrl_i64_i32 0 103 #define TCG_TARGET_HAS_extrh_i64_i32 0 104 #define TCG_TARGET_HAS_div_i64 0 105 #define TCG_TARGET_HAS_rem_i64 0 106 #define TCG_TARGET_HAS_div2_i64 0 107 #define TCG_TARGET_HAS_rot_i64 0 108 #define TCG_TARGET_HAS_ext8s_i64 0 109 #define TCG_TARGET_HAS_ext16s_i64 0 110 #define TCG_TARGET_HAS_ext32s_i64 0 111 #define TCG_TARGET_HAS_ext8u_i64 0 112 #define TCG_TARGET_HAS_ext16u_i64 0 113 #define TCG_TARGET_HAS_ext32u_i64 0 114 #define TCG_TARGET_HAS_bswap16_i64 0 115 #define TCG_TARGET_HAS_bswap32_i64 0 116 #define TCG_TARGET_HAS_bswap64_i64 0 117 #define TCG_TARGET_HAS_neg_i64 0 118 #define TCG_TARGET_HAS_not_i64 0 119 #define TCG_TARGET_HAS_andc_i64 0 120 #define TCG_TARGET_HAS_orc_i64 0 121 #define TCG_TARGET_HAS_eqv_i64 0 122 #define TCG_TARGET_HAS_nand_i64 0 123 #define TCG_TARGET_HAS_nor_i64 0 124 #define TCG_TARGET_HAS_clz_i64 0 125 #define TCG_TARGET_HAS_ctz_i64 0 126 #define TCG_TARGET_HAS_ctpop_i64 0 127 #define TCG_TARGET_HAS_deposit_i64 0 128 #define TCG_TARGET_HAS_extract_i64 0 129 #define TCG_TARGET_HAS_sextract_i64 0 130 #define TCG_TARGET_HAS_extract2_i64 0 131 #define TCG_TARGET_HAS_movcond_i64 0 132 #define TCG_TARGET_HAS_add2_i64 0 133 #define TCG_TARGET_HAS_sub2_i64 0 134 #define TCG_TARGET_HAS_mulu2_i64 0 135 #define TCG_TARGET_HAS_muls2_i64 0 136 #define TCG_TARGET_HAS_muluh_i64 0 137 #define TCG_TARGET_HAS_mulsh_i64 0 138 /* Turn some undef macros into true macros. */ 139 #define TCG_TARGET_HAS_add2_i32 1 140 #define TCG_TARGET_HAS_sub2_i32 1 141 #endif 142 143 #ifndef TCG_TARGET_deposit_i32_valid 144 #define TCG_TARGET_deposit_i32_valid(ofs, len) 1 145 #endif 146 #ifndef TCG_TARGET_deposit_i64_valid 147 #define TCG_TARGET_deposit_i64_valid(ofs, len) 1 148 #endif 149 #ifndef TCG_TARGET_extract_i32_valid 150 #define TCG_TARGET_extract_i32_valid(ofs, len) 1 151 #endif 152 #ifndef TCG_TARGET_extract_i64_valid 153 #define TCG_TARGET_extract_i64_valid(ofs, len) 1 154 #endif 155 156 /* Only one of DIV or DIV2 should be defined. */ 157 #if defined(TCG_TARGET_HAS_div_i32) 158 #define TCG_TARGET_HAS_div2_i32 0 159 #elif defined(TCG_TARGET_HAS_div2_i32) 160 #define TCG_TARGET_HAS_div_i32 0 161 #define TCG_TARGET_HAS_rem_i32 0 162 #endif 163 #if defined(TCG_TARGET_HAS_div_i64) 164 #define TCG_TARGET_HAS_div2_i64 0 165 #elif defined(TCG_TARGET_HAS_div2_i64) 166 #define TCG_TARGET_HAS_div_i64 0 167 #define TCG_TARGET_HAS_rem_i64 0 168 #endif 169 170 /* For 32-bit targets, some sort of unsigned widening multiply is required. */ 171 #if TCG_TARGET_REG_BITS == 32 \ 172 && !(defined(TCG_TARGET_HAS_mulu2_i32) \ 173 || defined(TCG_TARGET_HAS_muluh_i32)) 174 # error "Missing unsigned widening multiply" 175 #endif 176 177 #if !defined(TCG_TARGET_HAS_v64) \ 178 && !defined(TCG_TARGET_HAS_v128) \ 179 && !defined(TCG_TARGET_HAS_v256) 180 #define TCG_TARGET_MAYBE_vec 0 181 #define TCG_TARGET_HAS_abs_vec 0 182 #define TCG_TARGET_HAS_neg_vec 0 183 #define TCG_TARGET_HAS_not_vec 0 184 #define TCG_TARGET_HAS_andc_vec 0 185 #define TCG_TARGET_HAS_orc_vec 0 186 #define TCG_TARGET_HAS_roti_vec 0 187 #define TCG_TARGET_HAS_rots_vec 0 188 #define TCG_TARGET_HAS_rotv_vec 0 189 #define TCG_TARGET_HAS_shi_vec 0 190 #define TCG_TARGET_HAS_shs_vec 0 191 #define TCG_TARGET_HAS_shv_vec 0 192 #define TCG_TARGET_HAS_mul_vec 0 193 #define TCG_TARGET_HAS_sat_vec 0 194 #define TCG_TARGET_HAS_minmax_vec 0 195 #define TCG_TARGET_HAS_bitsel_vec 0 196 #define TCG_TARGET_HAS_cmpsel_vec 0 197 #else 198 #define TCG_TARGET_MAYBE_vec 1 199 #endif 200 #ifndef TCG_TARGET_HAS_v64 201 #define TCG_TARGET_HAS_v64 0 202 #endif 203 #ifndef TCG_TARGET_HAS_v128 204 #define TCG_TARGET_HAS_v128 0 205 #endif 206 #ifndef TCG_TARGET_HAS_v256 207 #define TCG_TARGET_HAS_v256 0 208 #endif 209 210 #ifndef TARGET_INSN_START_EXTRA_WORDS 211 # define TARGET_INSN_START_WORDS 1 212 #else 213 # define TARGET_INSN_START_WORDS (1 + TARGET_INSN_START_EXTRA_WORDS) 214 #endif 215 216 typedef enum TCGOpcode { 217 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name, 218 #include "tcg/tcg-opc.h" 219 #undef DEF 220 NB_OPS, 221 } TCGOpcode; 222 223 #define tcg_regset_set_reg(d, r) ((d) |= (TCGRegSet)1 << (r)) 224 #define tcg_regset_reset_reg(d, r) ((d) &= ~((TCGRegSet)1 << (r))) 225 #define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1) 226 227 #ifndef TCG_TARGET_INSN_UNIT_SIZE 228 # error "Missing TCG_TARGET_INSN_UNIT_SIZE" 229 #elif TCG_TARGET_INSN_UNIT_SIZE == 1 230 typedef uint8_t tcg_insn_unit; 231 #elif TCG_TARGET_INSN_UNIT_SIZE == 2 232 typedef uint16_t tcg_insn_unit; 233 #elif TCG_TARGET_INSN_UNIT_SIZE == 4 234 typedef uint32_t tcg_insn_unit; 235 #elif TCG_TARGET_INSN_UNIT_SIZE == 8 236 typedef uint64_t tcg_insn_unit; 237 #else 238 /* The port better have done this. */ 239 #endif 240 241 242 #if defined CONFIG_DEBUG_TCG || defined QEMU_STATIC_ANALYSIS 243 # define tcg_debug_assert(X) do { assert(X); } while (0) 244 #else 245 # define tcg_debug_assert(X) \ 246 do { if (!(X)) { __builtin_unreachable(); } } while (0) 247 #endif 248 249 typedef struct TCGRelocation TCGRelocation; 250 struct TCGRelocation { 251 QSIMPLEQ_ENTRY(TCGRelocation) next; 252 tcg_insn_unit *ptr; 253 intptr_t addend; 254 int type; 255 }; 256 257 typedef struct TCGLabel TCGLabel; 258 struct TCGLabel { 259 unsigned present : 1; 260 unsigned has_value : 1; 261 unsigned id : 14; 262 unsigned refs : 16; 263 union { 264 uintptr_t value; 265 const tcg_insn_unit *value_ptr; 266 } u; 267 QSIMPLEQ_HEAD(, TCGRelocation) relocs; 268 QSIMPLEQ_ENTRY(TCGLabel) next; 269 }; 270 271 typedef struct TCGPool { 272 struct TCGPool *next; 273 int size; 274 uint8_t data[] __attribute__ ((aligned)); 275 } TCGPool; 276 277 #define TCG_POOL_CHUNK_SIZE 32768 278 279 #define TCG_MAX_TEMPS 512 280 #define TCG_MAX_INSNS 512 281 282 /* when the size of the arguments of a called function is smaller than 283 this value, they are statically allocated in the TB stack frame */ 284 #define TCG_STATIC_CALL_ARGS_SIZE 128 285 286 typedef enum TCGType { 287 TCG_TYPE_I32, 288 TCG_TYPE_I64, 289 290 TCG_TYPE_V64, 291 TCG_TYPE_V128, 292 TCG_TYPE_V256, 293 294 TCG_TYPE_COUNT, /* number of different types */ 295 296 /* An alias for the size of the host register. */ 297 #if TCG_TARGET_REG_BITS == 32 298 TCG_TYPE_REG = TCG_TYPE_I32, 299 #else 300 TCG_TYPE_REG = TCG_TYPE_I64, 301 #endif 302 303 /* An alias for the size of the native pointer. */ 304 #if UINTPTR_MAX == UINT32_MAX 305 TCG_TYPE_PTR = TCG_TYPE_I32, 306 #else 307 TCG_TYPE_PTR = TCG_TYPE_I64, 308 #endif 309 310 /* An alias for the size of the target "long", aka register. */ 311 #if TARGET_LONG_BITS == 64 312 TCG_TYPE_TL = TCG_TYPE_I64, 313 #else 314 TCG_TYPE_TL = TCG_TYPE_I32, 315 #endif 316 } TCGType; 317 318 /** 319 * get_alignment_bits 320 * @memop: MemOp value 321 * 322 * Extract the alignment size from the memop. 323 */ 324 static inline unsigned get_alignment_bits(MemOp memop) 325 { 326 unsigned a = memop & MO_AMASK; 327 328 if (a == MO_UNALN) { 329 /* No alignment required. */ 330 a = 0; 331 } else if (a == MO_ALIGN) { 332 /* A natural alignment requirement. */ 333 a = memop & MO_SIZE; 334 } else { 335 /* A specific alignment requirement. */ 336 a = a >> MO_ASHIFT; 337 } 338 #if defined(CONFIG_SOFTMMU) 339 /* The requested alignment cannot overlap the TLB flags. */ 340 tcg_debug_assert((TLB_FLAGS_MASK & ((1 << a) - 1)) == 0); 341 #endif 342 return a; 343 } 344 345 typedef tcg_target_ulong TCGArg; 346 347 /* Define type and accessor macros for TCG variables. 348 349 TCG variables are the inputs and outputs of TCG ops, as described 350 in tcg/README. Target CPU front-end code uses these types to deal 351 with TCG variables as it emits TCG code via the tcg_gen_* functions. 352 They come in several flavours: 353 * TCGv_i32 : 32 bit integer type 354 * TCGv_i64 : 64 bit integer type 355 * TCGv_ptr : a host pointer type 356 * TCGv_vec : a host vector type; the exact size is not exposed 357 to the CPU front-end code. 358 * TCGv : an integer type the same size as target_ulong 359 (an alias for either TCGv_i32 or TCGv_i64) 360 The compiler's type checking will complain if you mix them 361 up and pass the wrong sized TCGv to a function. 362 363 Users of tcg_gen_* don't need to know about any of the internal 364 details of these, and should treat them as opaque types. 365 You won't be able to look inside them in a debugger either. 366 367 Internal implementation details follow: 368 369 Note that there is no definition of the structs TCGv_i32_d etc anywhere. 370 This is deliberate, because the values we store in variables of type 371 TCGv_i32 are not really pointers-to-structures. They're just small 372 integers, but keeping them in pointer types like this means that the 373 compiler will complain if you accidentally pass a TCGv_i32 to a 374 function which takes a TCGv_i64, and so on. Only the internals of 375 TCG need to care about the actual contents of the types. */ 376 377 typedef struct TCGv_i32_d *TCGv_i32; 378 typedef struct TCGv_i64_d *TCGv_i64; 379 typedef struct TCGv_ptr_d *TCGv_ptr; 380 typedef struct TCGv_vec_d *TCGv_vec; 381 typedef TCGv_ptr TCGv_env; 382 #if TARGET_LONG_BITS == 32 383 #define TCGv TCGv_i32 384 #elif TARGET_LONG_BITS == 64 385 #define TCGv TCGv_i64 386 #else 387 #error Unhandled TARGET_LONG_BITS value 388 #endif 389 390 /* call flags */ 391 /* Helper does not read globals (either directly or through an exception). It 392 implies TCG_CALL_NO_WRITE_GLOBALS. */ 393 #define TCG_CALL_NO_READ_GLOBALS 0x0001 394 /* Helper does not write globals */ 395 #define TCG_CALL_NO_WRITE_GLOBALS 0x0002 396 /* Helper can be safely suppressed if the return value is not used. */ 397 #define TCG_CALL_NO_SIDE_EFFECTS 0x0004 398 /* Helper is QEMU_NORETURN. */ 399 #define TCG_CALL_NO_RETURN 0x0008 400 401 /* convenience version of most used call flags */ 402 #define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS 403 #define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS 404 #define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS 405 #define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE) 406 #define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE) 407 408 /* Used to align parameters. See the comment before tcgv_i32_temp. */ 409 #define TCG_CALL_DUMMY_ARG ((TCGArg)0) 410 411 /* 412 * Flags for the bswap opcodes. 413 * If IZ, the input is zero-extended, otherwise unknown. 414 * If OZ or OS, the output is zero- or sign-extended respectively, 415 * otherwise the high bits are undefined. 416 */ 417 enum { 418 TCG_BSWAP_IZ = 1, 419 TCG_BSWAP_OZ = 2, 420 TCG_BSWAP_OS = 4, 421 }; 422 423 typedef enum TCGTempVal { 424 TEMP_VAL_DEAD, 425 TEMP_VAL_REG, 426 TEMP_VAL_MEM, 427 TEMP_VAL_CONST, 428 } TCGTempVal; 429 430 typedef enum TCGTempKind { 431 /* Temp is dead at the end of all basic blocks. */ 432 TEMP_NORMAL, 433 /* Temp is saved across basic blocks but dead at the end of TBs. */ 434 TEMP_LOCAL, 435 /* Temp is saved across both basic blocks and translation blocks. */ 436 TEMP_GLOBAL, 437 /* Temp is in a fixed register. */ 438 TEMP_FIXED, 439 /* Temp is a fixed constant. */ 440 TEMP_CONST, 441 } TCGTempKind; 442 443 typedef struct TCGTemp { 444 TCGReg reg:8; 445 TCGTempVal val_type:8; 446 TCGType base_type:8; 447 TCGType type:8; 448 TCGTempKind kind:3; 449 unsigned int indirect_reg:1; 450 unsigned int indirect_base:1; 451 unsigned int mem_coherent:1; 452 unsigned int mem_allocated:1; 453 unsigned int temp_allocated:1; 454 455 int64_t val; 456 struct TCGTemp *mem_base; 457 intptr_t mem_offset; 458 const char *name; 459 460 /* Pass-specific information that can be stored for a temporary. 461 One word worth of integer data, and one pointer to data 462 allocated separately. */ 463 uintptr_t state; 464 void *state_ptr; 465 } TCGTemp; 466 467 typedef struct TCGContext TCGContext; 468 469 typedef struct TCGTempSet { 470 unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)]; 471 } TCGTempSet; 472 473 /* While we limit helpers to 6 arguments, for 32-bit hosts, with padding, 474 this imples a max of 6*2 (64-bit in) + 2 (64-bit out) = 14 operands. 475 There are never more than 2 outputs, which means that we can store all 476 dead + sync data within 16 bits. */ 477 #define DEAD_ARG 4 478 #define SYNC_ARG 1 479 typedef uint16_t TCGLifeData; 480 481 /* The layout here is designed to avoid a bitfield crossing of 482 a 32-bit boundary, which would cause GCC to add extra padding. */ 483 typedef struct TCGOp { 484 TCGOpcode opc : 8; /* 8 */ 485 486 /* Parameters for this opcode. See below. */ 487 unsigned param1 : 4; /* 12 */ 488 unsigned param2 : 4; /* 16 */ 489 490 /* Lifetime data of the operands. */ 491 unsigned life : 16; /* 32 */ 492 493 /* Next and previous opcodes. */ 494 QTAILQ_ENTRY(TCGOp) link; 495 #ifdef CONFIG_PLUGIN 496 QSIMPLEQ_ENTRY(TCGOp) plugin_link; 497 #endif 498 499 /* Arguments for the opcode. */ 500 TCGArg args[MAX_OPC_PARAM]; 501 502 /* Register preferences for the output(s). */ 503 TCGRegSet output_pref[2]; 504 } TCGOp; 505 506 #define TCGOP_CALLI(X) (X)->param1 507 #define TCGOP_CALLO(X) (X)->param2 508 509 #define TCGOP_VECL(X) (X)->param1 510 #define TCGOP_VECE(X) (X)->param2 511 512 /* Make sure operands fit in the bitfields above. */ 513 QEMU_BUILD_BUG_ON(NB_OPS > (1 << 8)); 514 515 typedef struct TCGProfile { 516 int64_t cpu_exec_time; 517 int64_t tb_count1; 518 int64_t tb_count; 519 int64_t op_count; /* total insn count */ 520 int op_count_max; /* max insn per TB */ 521 int temp_count_max; 522 int64_t temp_count; 523 int64_t del_op_count; 524 int64_t code_in_len; 525 int64_t code_out_len; 526 int64_t search_out_len; 527 int64_t interm_time; 528 int64_t code_time; 529 int64_t la_time; 530 int64_t opt_time; 531 int64_t restore_count; 532 int64_t restore_time; 533 int64_t table_op_count[NB_OPS]; 534 } TCGProfile; 535 536 struct TCGContext { 537 uint8_t *pool_cur, *pool_end; 538 TCGPool *pool_first, *pool_current, *pool_first_large; 539 int nb_labels; 540 int nb_globals; 541 int nb_temps; 542 int nb_indirects; 543 int nb_ops; 544 545 /* goto_tb support */ 546 tcg_insn_unit *code_buf; 547 uint16_t *tb_jmp_reset_offset; /* tb->jmp_reset_offset */ 548 uintptr_t *tb_jmp_insn_offset; /* tb->jmp_target_arg if direct_jump */ 549 uintptr_t *tb_jmp_target_addr; /* tb->jmp_target_arg if !direct_jump */ 550 551 TCGRegSet reserved_regs; 552 uint32_t tb_cflags; /* cflags of the current TB */ 553 intptr_t current_frame_offset; 554 intptr_t frame_start; 555 intptr_t frame_end; 556 TCGTemp *frame_temp; 557 558 tcg_insn_unit *code_ptr; 559 560 #ifdef CONFIG_PROFILER 561 TCGProfile prof; 562 #endif 563 564 #ifdef CONFIG_DEBUG_TCG 565 int temps_in_use; 566 int goto_tb_issue_mask; 567 const TCGOpcode *vecop_list; 568 #endif 569 570 /* Code generation. Note that we specifically do not use tcg_insn_unit 571 here, because there's too much arithmetic throughout that relies 572 on addition and subtraction working on bytes. Rely on the GCC 573 extension that allows arithmetic on void*. */ 574 void *code_gen_buffer; 575 size_t code_gen_buffer_size; 576 void *code_gen_ptr; 577 void *data_gen_ptr; 578 579 /* Threshold to flush the translated code buffer. */ 580 void *code_gen_highwater; 581 582 size_t tb_phys_invalidate_count; 583 584 /* Track which vCPU triggers events */ 585 CPUState *cpu; /* *_trans */ 586 587 /* These structures are private to tcg-target.c.inc. */ 588 #ifdef TCG_TARGET_NEED_LDST_LABELS 589 QSIMPLEQ_HEAD(, TCGLabelQemuLdst) ldst_labels; 590 #endif 591 #ifdef TCG_TARGET_NEED_POOL_LABELS 592 struct TCGLabelPoolData *pool_labels; 593 #endif 594 595 TCGLabel *exitreq_label; 596 597 #ifdef CONFIG_PLUGIN 598 /* 599 * We keep one plugin_tb struct per TCGContext. Note that on every TB 600 * translation we clear but do not free its contents; this way we 601 * avoid a lot of malloc/free churn, since after a few TB's it's 602 * unlikely that we'll need to allocate either more instructions or more 603 * space for instructions (for variable-instruction-length ISAs). 604 */ 605 struct qemu_plugin_tb *plugin_tb; 606 607 /* descriptor of the instruction being translated */ 608 struct qemu_plugin_insn *plugin_insn; 609 610 /* list to quickly access the injected ops */ 611 QSIMPLEQ_HEAD(, TCGOp) plugin_ops; 612 #endif 613 614 GHashTable *const_table[TCG_TYPE_COUNT]; 615 TCGTempSet free_temps[TCG_TYPE_COUNT * 2]; 616 TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */ 617 618 QTAILQ_HEAD(, TCGOp) ops, free_ops; 619 QSIMPLEQ_HEAD(, TCGLabel) labels; 620 621 /* Tells which temporary holds a given register. 622 It does not take into account fixed registers */ 623 TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS]; 624 625 uint16_t gen_insn_end_off[TCG_MAX_INSNS]; 626 target_ulong gen_insn_data[TCG_MAX_INSNS][TARGET_INSN_START_WORDS]; 627 628 /* Exit to translator on overflow. */ 629 sigjmp_buf jmp_trans; 630 }; 631 632 static inline bool temp_readonly(TCGTemp *ts) 633 { 634 return ts->kind >= TEMP_FIXED; 635 } 636 637 extern __thread TCGContext *tcg_ctx; 638 extern const void *tcg_code_gen_epilogue; 639 extern uintptr_t tcg_splitwx_diff; 640 extern TCGv_env cpu_env; 641 642 bool in_code_gen_buffer(const void *p); 643 644 #ifdef CONFIG_DEBUG_TCG 645 const void *tcg_splitwx_to_rx(void *rw); 646 void *tcg_splitwx_to_rw(const void *rx); 647 #else 648 static inline const void *tcg_splitwx_to_rx(void *rw) 649 { 650 return rw ? rw + tcg_splitwx_diff : NULL; 651 } 652 653 static inline void *tcg_splitwx_to_rw(const void *rx) 654 { 655 return rx ? (void *)rx - tcg_splitwx_diff : NULL; 656 } 657 #endif 658 659 static inline size_t temp_idx(TCGTemp *ts) 660 { 661 ptrdiff_t n = ts - tcg_ctx->temps; 662 tcg_debug_assert(n >= 0 && n < tcg_ctx->nb_temps); 663 return n; 664 } 665 666 static inline TCGArg temp_arg(TCGTemp *ts) 667 { 668 return (uintptr_t)ts; 669 } 670 671 static inline TCGTemp *arg_temp(TCGArg a) 672 { 673 return (TCGTemp *)(uintptr_t)a; 674 } 675 676 /* Using the offset of a temporary, relative to TCGContext, rather than 677 its index means that we don't use 0. That leaves offset 0 free for 678 a NULL representation without having to leave index 0 unused. */ 679 static inline TCGTemp *tcgv_i32_temp(TCGv_i32 v) 680 { 681 uintptr_t o = (uintptr_t)v; 682 TCGTemp *t = (void *)tcg_ctx + o; 683 tcg_debug_assert(offsetof(TCGContext, temps[temp_idx(t)]) == o); 684 return t; 685 } 686 687 static inline TCGTemp *tcgv_i64_temp(TCGv_i64 v) 688 { 689 return tcgv_i32_temp((TCGv_i32)v); 690 } 691 692 static inline TCGTemp *tcgv_ptr_temp(TCGv_ptr v) 693 { 694 return tcgv_i32_temp((TCGv_i32)v); 695 } 696 697 static inline TCGTemp *tcgv_vec_temp(TCGv_vec v) 698 { 699 return tcgv_i32_temp((TCGv_i32)v); 700 } 701 702 static inline TCGArg tcgv_i32_arg(TCGv_i32 v) 703 { 704 return temp_arg(tcgv_i32_temp(v)); 705 } 706 707 static inline TCGArg tcgv_i64_arg(TCGv_i64 v) 708 { 709 return temp_arg(tcgv_i64_temp(v)); 710 } 711 712 static inline TCGArg tcgv_ptr_arg(TCGv_ptr v) 713 { 714 return temp_arg(tcgv_ptr_temp(v)); 715 } 716 717 static inline TCGArg tcgv_vec_arg(TCGv_vec v) 718 { 719 return temp_arg(tcgv_vec_temp(v)); 720 } 721 722 static inline TCGv_i32 temp_tcgv_i32(TCGTemp *t) 723 { 724 (void)temp_idx(t); /* trigger embedded assert */ 725 return (TCGv_i32)((void *)t - (void *)tcg_ctx); 726 } 727 728 static inline TCGv_i64 temp_tcgv_i64(TCGTemp *t) 729 { 730 return (TCGv_i64)temp_tcgv_i32(t); 731 } 732 733 static inline TCGv_ptr temp_tcgv_ptr(TCGTemp *t) 734 { 735 return (TCGv_ptr)temp_tcgv_i32(t); 736 } 737 738 static inline TCGv_vec temp_tcgv_vec(TCGTemp *t) 739 { 740 return (TCGv_vec)temp_tcgv_i32(t); 741 } 742 743 #if TCG_TARGET_REG_BITS == 32 744 static inline TCGv_i32 TCGV_LOW(TCGv_i64 t) 745 { 746 return temp_tcgv_i32(tcgv_i64_temp(t)); 747 } 748 749 static inline TCGv_i32 TCGV_HIGH(TCGv_i64 t) 750 { 751 return temp_tcgv_i32(tcgv_i64_temp(t) + 1); 752 } 753 #endif 754 755 static inline TCGArg tcg_get_insn_param(TCGOp *op, int arg) 756 { 757 return op->args[arg]; 758 } 759 760 static inline void tcg_set_insn_param(TCGOp *op, int arg, TCGArg v) 761 { 762 op->args[arg] = v; 763 } 764 765 static inline target_ulong tcg_get_insn_start_param(TCGOp *op, int arg) 766 { 767 #if TARGET_LONG_BITS <= TCG_TARGET_REG_BITS 768 return tcg_get_insn_param(op, arg); 769 #else 770 return tcg_get_insn_param(op, arg * 2) | 771 ((uint64_t)tcg_get_insn_param(op, arg * 2 + 1) << 32); 772 #endif 773 } 774 775 static inline void tcg_set_insn_start_param(TCGOp *op, int arg, target_ulong v) 776 { 777 #if TARGET_LONG_BITS <= TCG_TARGET_REG_BITS 778 tcg_set_insn_param(op, arg, v); 779 #else 780 tcg_set_insn_param(op, arg * 2, v); 781 tcg_set_insn_param(op, arg * 2 + 1, v >> 32); 782 #endif 783 } 784 785 /* The last op that was emitted. */ 786 static inline TCGOp *tcg_last_op(void) 787 { 788 return QTAILQ_LAST(&tcg_ctx->ops); 789 } 790 791 /* Test for whether to terminate the TB for using too many opcodes. */ 792 static inline bool tcg_op_buf_full(void) 793 { 794 /* This is not a hard limit, it merely stops translation when 795 * we have produced "enough" opcodes. We want to limit TB size 796 * such that a RISC host can reasonably use a 16-bit signed 797 * branch within the TB. We also need to be mindful of the 798 * 16-bit unsigned offsets, TranslationBlock.jmp_reset_offset[] 799 * and TCGContext.gen_insn_end_off[]. 800 */ 801 return tcg_ctx->nb_ops >= 4000; 802 } 803 804 /* pool based memory allocation */ 805 806 /* user-mode: mmap_lock must be held for tcg_malloc_internal. */ 807 void *tcg_malloc_internal(TCGContext *s, int size); 808 void tcg_pool_reset(TCGContext *s); 809 TranslationBlock *tcg_tb_alloc(TCGContext *s); 810 811 void tb_destroy(TranslationBlock *tb); 812 void tcg_region_reset_all(void); 813 814 size_t tcg_code_size(void); 815 size_t tcg_code_capacity(void); 816 817 void tcg_tb_insert(TranslationBlock *tb); 818 void tcg_tb_remove(TranslationBlock *tb); 819 size_t tcg_tb_phys_invalidate_count(void); 820 TranslationBlock *tcg_tb_lookup(uintptr_t tc_ptr); 821 void tcg_tb_foreach(GTraverseFunc func, gpointer user_data); 822 size_t tcg_nb_tbs(void); 823 824 /* user-mode: Called with mmap_lock held. */ 825 static inline void *tcg_malloc(int size) 826 { 827 TCGContext *s = tcg_ctx; 828 uint8_t *ptr, *ptr_end; 829 830 /* ??? This is a weak placeholder for minimum malloc alignment. */ 831 size = QEMU_ALIGN_UP(size, 8); 832 833 ptr = s->pool_cur; 834 ptr_end = ptr + size; 835 if (unlikely(ptr_end > s->pool_end)) { 836 return tcg_malloc_internal(tcg_ctx, size); 837 } else { 838 s->pool_cur = ptr_end; 839 return ptr; 840 } 841 } 842 843 void tcg_init(size_t tb_size, int splitwx, unsigned max_cpus); 844 void tcg_register_thread(void); 845 void tcg_prologue_init(TCGContext *s); 846 void tcg_func_start(TCGContext *s); 847 848 int tcg_gen_code(TCGContext *s, TranslationBlock *tb); 849 850 void tcg_set_frame(TCGContext *s, TCGReg reg, intptr_t start, intptr_t size); 851 852 TCGTemp *tcg_global_mem_new_internal(TCGType, TCGv_ptr, 853 intptr_t, const char *); 854 TCGTemp *tcg_temp_new_internal(TCGType, bool); 855 void tcg_temp_free_internal(TCGTemp *); 856 TCGv_vec tcg_temp_new_vec(TCGType type); 857 TCGv_vec tcg_temp_new_vec_matching(TCGv_vec match); 858 859 static inline void tcg_temp_free_i32(TCGv_i32 arg) 860 { 861 tcg_temp_free_internal(tcgv_i32_temp(arg)); 862 } 863 864 static inline void tcg_temp_free_i64(TCGv_i64 arg) 865 { 866 tcg_temp_free_internal(tcgv_i64_temp(arg)); 867 } 868 869 static inline void tcg_temp_free_ptr(TCGv_ptr arg) 870 { 871 tcg_temp_free_internal(tcgv_ptr_temp(arg)); 872 } 873 874 static inline void tcg_temp_free_vec(TCGv_vec arg) 875 { 876 tcg_temp_free_internal(tcgv_vec_temp(arg)); 877 } 878 879 static inline TCGv_i32 tcg_global_mem_new_i32(TCGv_ptr reg, intptr_t offset, 880 const char *name) 881 { 882 TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_I32, reg, offset, name); 883 return temp_tcgv_i32(t); 884 } 885 886 static inline TCGv_i32 tcg_temp_new_i32(void) 887 { 888 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I32, false); 889 return temp_tcgv_i32(t); 890 } 891 892 static inline TCGv_i32 tcg_temp_local_new_i32(void) 893 { 894 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I32, true); 895 return temp_tcgv_i32(t); 896 } 897 898 static inline TCGv_i64 tcg_global_mem_new_i64(TCGv_ptr reg, intptr_t offset, 899 const char *name) 900 { 901 TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_I64, reg, offset, name); 902 return temp_tcgv_i64(t); 903 } 904 905 static inline TCGv_i64 tcg_temp_new_i64(void) 906 { 907 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I64, false); 908 return temp_tcgv_i64(t); 909 } 910 911 static inline TCGv_i64 tcg_temp_local_new_i64(void) 912 { 913 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I64, true); 914 return temp_tcgv_i64(t); 915 } 916 917 static inline TCGv_ptr tcg_global_mem_new_ptr(TCGv_ptr reg, intptr_t offset, 918 const char *name) 919 { 920 TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_PTR, reg, offset, name); 921 return temp_tcgv_ptr(t); 922 } 923 924 static inline TCGv_ptr tcg_temp_new_ptr(void) 925 { 926 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_PTR, false); 927 return temp_tcgv_ptr(t); 928 } 929 930 static inline TCGv_ptr tcg_temp_local_new_ptr(void) 931 { 932 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_PTR, true); 933 return temp_tcgv_ptr(t); 934 } 935 936 #if defined(CONFIG_DEBUG_TCG) 937 /* If you call tcg_clear_temp_count() at the start of a section of 938 * code which is not supposed to leak any TCG temporaries, then 939 * calling tcg_check_temp_count() at the end of the section will 940 * return 1 if the section did in fact leak a temporary. 941 */ 942 void tcg_clear_temp_count(void); 943 int tcg_check_temp_count(void); 944 #else 945 #define tcg_clear_temp_count() do { } while (0) 946 #define tcg_check_temp_count() 0 947 #endif 948 949 int64_t tcg_cpu_exec_time(void); 950 void tcg_dump_info(void); 951 void tcg_dump_op_count(void); 952 953 #define TCG_CT_CONST 1 /* any constant of register size */ 954 955 typedef struct TCGArgConstraint { 956 unsigned ct : 16; 957 unsigned alias_index : 4; 958 unsigned sort_index : 4; 959 bool oalias : 1; 960 bool ialias : 1; 961 bool newreg : 1; 962 TCGRegSet regs; 963 } TCGArgConstraint; 964 965 #define TCG_MAX_OP_ARGS 16 966 967 /* Bits for TCGOpDef->flags, 8 bits available, all used. */ 968 enum { 969 /* Instruction exits the translation block. */ 970 TCG_OPF_BB_EXIT = 0x01, 971 /* Instruction defines the end of a basic block. */ 972 TCG_OPF_BB_END = 0x02, 973 /* Instruction clobbers call registers and potentially update globals. */ 974 TCG_OPF_CALL_CLOBBER = 0x04, 975 /* Instruction has side effects: it cannot be removed if its outputs 976 are not used, and might trigger exceptions. */ 977 TCG_OPF_SIDE_EFFECTS = 0x08, 978 /* Instruction operands are 64-bits (otherwise 32-bits). */ 979 TCG_OPF_64BIT = 0x10, 980 /* Instruction is optional and not implemented by the host, or insn 981 is generic and should not be implemened by the host. */ 982 TCG_OPF_NOT_PRESENT = 0x20, 983 /* Instruction operands are vectors. */ 984 TCG_OPF_VECTOR = 0x40, 985 /* Instruction is a conditional branch. */ 986 TCG_OPF_COND_BRANCH = 0x80 987 }; 988 989 typedef struct TCGOpDef { 990 const char *name; 991 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args; 992 uint8_t flags; 993 TCGArgConstraint *args_ct; 994 } TCGOpDef; 995 996 extern TCGOpDef tcg_op_defs[]; 997 extern const size_t tcg_op_defs_max; 998 999 typedef struct TCGTargetOpDef { 1000 TCGOpcode op; 1001 const char *args_ct_str[TCG_MAX_OP_ARGS]; 1002 } TCGTargetOpDef; 1003 1004 #define tcg_abort() \ 1005 do {\ 1006 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\ 1007 abort();\ 1008 } while (0) 1009 1010 bool tcg_op_supported(TCGOpcode op); 1011 1012 void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args); 1013 1014 TCGOp *tcg_emit_op(TCGOpcode opc); 1015 void tcg_op_remove(TCGContext *s, TCGOp *op); 1016 TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *op, TCGOpcode opc); 1017 TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *op, TCGOpcode opc); 1018 1019 /** 1020 * tcg_remove_ops_after: 1021 * @op: target operation 1022 * 1023 * Discard any opcodes emitted since @op. Expected usage is to save 1024 * a starting point with tcg_last_op(), speculatively emit opcodes, 1025 * then decide whether or not to keep those opcodes after the fact. 1026 */ 1027 void tcg_remove_ops_after(TCGOp *op); 1028 1029 void tcg_optimize(TCGContext *s); 1030 1031 /* Allocate a new temporary and initialize it with a constant. */ 1032 TCGv_i32 tcg_const_i32(int32_t val); 1033 TCGv_i64 tcg_const_i64(int64_t val); 1034 TCGv_i32 tcg_const_local_i32(int32_t val); 1035 TCGv_i64 tcg_const_local_i64(int64_t val); 1036 TCGv_vec tcg_const_zeros_vec(TCGType); 1037 TCGv_vec tcg_const_ones_vec(TCGType); 1038 TCGv_vec tcg_const_zeros_vec_matching(TCGv_vec); 1039 TCGv_vec tcg_const_ones_vec_matching(TCGv_vec); 1040 1041 /* 1042 * Locate or create a read-only temporary that is a constant. 1043 * This kind of temporary need not be freed, but for convenience 1044 * will be silently ignored by tcg_temp_free_*. 1045 */ 1046 TCGTemp *tcg_constant_internal(TCGType type, int64_t val); 1047 1048 static inline TCGv_i32 tcg_constant_i32(int32_t val) 1049 { 1050 return temp_tcgv_i32(tcg_constant_internal(TCG_TYPE_I32, val)); 1051 } 1052 1053 static inline TCGv_i64 tcg_constant_i64(int64_t val) 1054 { 1055 return temp_tcgv_i64(tcg_constant_internal(TCG_TYPE_I64, val)); 1056 } 1057 1058 TCGv_vec tcg_constant_vec(TCGType type, unsigned vece, int64_t val); 1059 TCGv_vec tcg_constant_vec_matching(TCGv_vec match, unsigned vece, int64_t val); 1060 1061 #if UINTPTR_MAX == UINT32_MAX 1062 # define tcg_const_ptr(x) ((TCGv_ptr)tcg_const_i32((intptr_t)(x))) 1063 # define tcg_const_local_ptr(x) ((TCGv_ptr)tcg_const_local_i32((intptr_t)(x))) 1064 #else 1065 # define tcg_const_ptr(x) ((TCGv_ptr)tcg_const_i64((intptr_t)(x))) 1066 # define tcg_const_local_ptr(x) ((TCGv_ptr)tcg_const_local_i64((intptr_t)(x))) 1067 #endif 1068 1069 TCGLabel *gen_new_label(void); 1070 1071 /** 1072 * label_arg 1073 * @l: label 1074 * 1075 * Encode a label for storage in the TCG opcode stream. 1076 */ 1077 1078 static inline TCGArg label_arg(TCGLabel *l) 1079 { 1080 return (uintptr_t)l; 1081 } 1082 1083 /** 1084 * arg_label 1085 * @i: value 1086 * 1087 * The opposite of label_arg. Retrieve a label from the 1088 * encoding of the TCG opcode stream. 1089 */ 1090 1091 static inline TCGLabel *arg_label(TCGArg i) 1092 { 1093 return (TCGLabel *)(uintptr_t)i; 1094 } 1095 1096 /** 1097 * tcg_ptr_byte_diff 1098 * @a, @b: addresses to be differenced 1099 * 1100 * There are many places within the TCG backends where we need a byte 1101 * difference between two pointers. While this can be accomplished 1102 * with local casting, it's easy to get wrong -- especially if one is 1103 * concerned with the signedness of the result. 1104 * 1105 * This version relies on GCC's void pointer arithmetic to get the 1106 * correct result. 1107 */ 1108 1109 static inline ptrdiff_t tcg_ptr_byte_diff(const void *a, const void *b) 1110 { 1111 return a - b; 1112 } 1113 1114 /** 1115 * tcg_pcrel_diff 1116 * @s: the tcg context 1117 * @target: address of the target 1118 * 1119 * Produce a pc-relative difference, from the current code_ptr 1120 * to the destination address. 1121 */ 1122 1123 static inline ptrdiff_t tcg_pcrel_diff(TCGContext *s, const void *target) 1124 { 1125 return tcg_ptr_byte_diff(target, tcg_splitwx_to_rx(s->code_ptr)); 1126 } 1127 1128 /** 1129 * tcg_tbrel_diff 1130 * @s: the tcg context 1131 * @target: address of the target 1132 * 1133 * Produce a difference, from the beginning of the current TB code 1134 * to the destination address. 1135 */ 1136 static inline ptrdiff_t tcg_tbrel_diff(TCGContext *s, const void *target) 1137 { 1138 return tcg_ptr_byte_diff(target, tcg_splitwx_to_rx(s->code_buf)); 1139 } 1140 1141 /** 1142 * tcg_current_code_size 1143 * @s: the tcg context 1144 * 1145 * Compute the current code size within the translation block. 1146 * This is used to fill in qemu's data structures for goto_tb. 1147 */ 1148 1149 static inline size_t tcg_current_code_size(TCGContext *s) 1150 { 1151 return tcg_ptr_byte_diff(s->code_ptr, s->code_buf); 1152 } 1153 1154 /* Combine the MemOp and mmu_idx parameters into a single value. */ 1155 typedef uint32_t TCGMemOpIdx; 1156 1157 /** 1158 * make_memop_idx 1159 * @op: memory operation 1160 * @idx: mmu index 1161 * 1162 * Encode these values into a single parameter. 1163 */ 1164 static inline TCGMemOpIdx make_memop_idx(MemOp op, unsigned idx) 1165 { 1166 tcg_debug_assert(idx <= 15); 1167 return (op << 4) | idx; 1168 } 1169 1170 /** 1171 * get_memop 1172 * @oi: combined op/idx parameter 1173 * 1174 * Extract the memory operation from the combined value. 1175 */ 1176 static inline MemOp get_memop(TCGMemOpIdx oi) 1177 { 1178 return oi >> 4; 1179 } 1180 1181 /** 1182 * get_mmuidx 1183 * @oi: combined op/idx parameter 1184 * 1185 * Extract the mmu index from the combined value. 1186 */ 1187 static inline unsigned get_mmuidx(TCGMemOpIdx oi) 1188 { 1189 return oi & 15; 1190 } 1191 1192 /** 1193 * tcg_qemu_tb_exec: 1194 * @env: pointer to CPUArchState for the CPU 1195 * @tb_ptr: address of generated code for the TB to execute 1196 * 1197 * Start executing code from a given translation block. 1198 * Where translation blocks have been linked, execution 1199 * may proceed from the given TB into successive ones. 1200 * Control eventually returns only when some action is needed 1201 * from the top-level loop: either control must pass to a TB 1202 * which has not yet been directly linked, or an asynchronous 1203 * event such as an interrupt needs handling. 1204 * 1205 * Return: The return value is the value passed to the corresponding 1206 * tcg_gen_exit_tb() at translation time of the last TB attempted to execute. 1207 * The value is either zero or a 4-byte aligned pointer to that TB combined 1208 * with additional information in its two least significant bits. The 1209 * additional information is encoded as follows: 1210 * 0, 1: the link between this TB and the next is via the specified 1211 * TB index (0 or 1). That is, we left the TB via (the equivalent 1212 * of) "goto_tb <index>". The main loop uses this to determine 1213 * how to link the TB just executed to the next. 1214 * 2: we are using instruction counting code generation, and we 1215 * did not start executing this TB because the instruction counter 1216 * would hit zero midway through it. In this case the pointer 1217 * returned is the TB we were about to execute, and the caller must 1218 * arrange to execute the remaining count of instructions. 1219 * 3: we stopped because the CPU's exit_request flag was set 1220 * (usually meaning that there is an interrupt that needs to be 1221 * handled). The pointer returned is the TB we were about to execute 1222 * when we noticed the pending exit request. 1223 * 1224 * If the bottom two bits indicate an exit-via-index then the CPU 1225 * state is correctly synchronised and ready for execution of the next 1226 * TB (and in particular the guest PC is the address to execute next). 1227 * Otherwise, we gave up on execution of this TB before it started, and 1228 * the caller must fix up the CPU state by calling the CPU's 1229 * synchronize_from_tb() method with the TB pointer we return (falling 1230 * back to calling the CPU's set_pc method with tb->pb if no 1231 * synchronize_from_tb() method exists). 1232 * 1233 * Note that TCG targets may use a different definition of tcg_qemu_tb_exec 1234 * to this default (which just calls the prologue.code emitted by 1235 * tcg_target_qemu_prologue()). 1236 */ 1237 #define TB_EXIT_MASK 3 1238 #define TB_EXIT_IDX0 0 1239 #define TB_EXIT_IDX1 1 1240 #define TB_EXIT_IDXMAX 1 1241 #define TB_EXIT_REQUESTED 3 1242 1243 #ifdef CONFIG_TCG_INTERPRETER 1244 uintptr_t tcg_qemu_tb_exec(CPUArchState *env, const void *tb_ptr); 1245 #else 1246 typedef uintptr_t tcg_prologue_fn(CPUArchState *env, const void *tb_ptr); 1247 extern tcg_prologue_fn *tcg_qemu_tb_exec; 1248 #endif 1249 1250 void tcg_register_jit(const void *buf, size_t buf_size); 1251 1252 #if TCG_TARGET_MAYBE_vec 1253 /* Return zero if the tuple (opc, type, vece) is unsupportable; 1254 return > 0 if it is directly supportable; 1255 return < 0 if we must call tcg_expand_vec_op. */ 1256 int tcg_can_emit_vec_op(TCGOpcode, TCGType, unsigned); 1257 #else 1258 static inline int tcg_can_emit_vec_op(TCGOpcode o, TCGType t, unsigned ve) 1259 { 1260 return 0; 1261 } 1262 #endif 1263 1264 /* Expand the tuple (opc, type, vece) on the given arguments. */ 1265 void tcg_expand_vec_op(TCGOpcode, TCGType, unsigned, TCGArg, ...); 1266 1267 /* Replicate a constant C accoring to the log2 of the element size. */ 1268 uint64_t dup_const(unsigned vece, uint64_t c); 1269 1270 #define dup_const(VECE, C) \ 1271 (__builtin_constant_p(VECE) \ 1272 ? ( (VECE) == MO_8 ? 0x0101010101010101ull * (uint8_t)(C) \ 1273 : (VECE) == MO_16 ? 0x0001000100010001ull * (uint16_t)(C) \ 1274 : (VECE) == MO_32 ? 0x0000000100000001ull * (uint32_t)(C) \ 1275 : (VECE) == MO_64 ? (uint64_t)(C) \ 1276 : (qemu_build_not_reached_always(), 0)) \ 1277 : dup_const(VECE, C)) 1278 1279 /* 1280 * Memory helpers that will be used by TCG generated code. 1281 */ 1282 #ifdef CONFIG_SOFTMMU 1283 /* Value zero-extended to tcg register size. */ 1284 tcg_target_ulong helper_ret_ldub_mmu(CPUArchState *env, target_ulong addr, 1285 TCGMemOpIdx oi, uintptr_t retaddr); 1286 tcg_target_ulong helper_le_lduw_mmu(CPUArchState *env, target_ulong addr, 1287 TCGMemOpIdx oi, uintptr_t retaddr); 1288 tcg_target_ulong helper_le_ldul_mmu(CPUArchState *env, target_ulong addr, 1289 TCGMemOpIdx oi, uintptr_t retaddr); 1290 uint64_t helper_le_ldq_mmu(CPUArchState *env, target_ulong addr, 1291 TCGMemOpIdx oi, uintptr_t retaddr); 1292 tcg_target_ulong helper_be_lduw_mmu(CPUArchState *env, target_ulong addr, 1293 TCGMemOpIdx oi, uintptr_t retaddr); 1294 tcg_target_ulong helper_be_ldul_mmu(CPUArchState *env, target_ulong addr, 1295 TCGMemOpIdx oi, uintptr_t retaddr); 1296 uint64_t helper_be_ldq_mmu(CPUArchState *env, target_ulong addr, 1297 TCGMemOpIdx oi, uintptr_t retaddr); 1298 1299 /* Value sign-extended to tcg register size. */ 1300 tcg_target_ulong helper_ret_ldsb_mmu(CPUArchState *env, target_ulong addr, 1301 TCGMemOpIdx oi, uintptr_t retaddr); 1302 tcg_target_ulong helper_le_ldsw_mmu(CPUArchState *env, target_ulong addr, 1303 TCGMemOpIdx oi, uintptr_t retaddr); 1304 tcg_target_ulong helper_le_ldsl_mmu(CPUArchState *env, target_ulong addr, 1305 TCGMemOpIdx oi, uintptr_t retaddr); 1306 tcg_target_ulong helper_be_ldsw_mmu(CPUArchState *env, target_ulong addr, 1307 TCGMemOpIdx oi, uintptr_t retaddr); 1308 tcg_target_ulong helper_be_ldsl_mmu(CPUArchState *env, target_ulong addr, 1309 TCGMemOpIdx oi, uintptr_t retaddr); 1310 1311 void helper_ret_stb_mmu(CPUArchState *env, target_ulong addr, uint8_t val, 1312 TCGMemOpIdx oi, uintptr_t retaddr); 1313 void helper_le_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val, 1314 TCGMemOpIdx oi, uintptr_t retaddr); 1315 void helper_le_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val, 1316 TCGMemOpIdx oi, uintptr_t retaddr); 1317 void helper_le_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val, 1318 TCGMemOpIdx oi, uintptr_t retaddr); 1319 void helper_be_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val, 1320 TCGMemOpIdx oi, uintptr_t retaddr); 1321 void helper_be_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val, 1322 TCGMemOpIdx oi, uintptr_t retaddr); 1323 void helper_be_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val, 1324 TCGMemOpIdx oi, uintptr_t retaddr); 1325 1326 /* Temporary aliases until backends are converted. */ 1327 #ifdef TARGET_WORDS_BIGENDIAN 1328 # define helper_ret_ldsw_mmu helper_be_ldsw_mmu 1329 # define helper_ret_lduw_mmu helper_be_lduw_mmu 1330 # define helper_ret_ldsl_mmu helper_be_ldsl_mmu 1331 # define helper_ret_ldul_mmu helper_be_ldul_mmu 1332 # define helper_ret_ldl_mmu helper_be_ldul_mmu 1333 # define helper_ret_ldq_mmu helper_be_ldq_mmu 1334 # define helper_ret_stw_mmu helper_be_stw_mmu 1335 # define helper_ret_stl_mmu helper_be_stl_mmu 1336 # define helper_ret_stq_mmu helper_be_stq_mmu 1337 #else 1338 # define helper_ret_ldsw_mmu helper_le_ldsw_mmu 1339 # define helper_ret_lduw_mmu helper_le_lduw_mmu 1340 # define helper_ret_ldsl_mmu helper_le_ldsl_mmu 1341 # define helper_ret_ldul_mmu helper_le_ldul_mmu 1342 # define helper_ret_ldl_mmu helper_le_ldul_mmu 1343 # define helper_ret_ldq_mmu helper_le_ldq_mmu 1344 # define helper_ret_stw_mmu helper_le_stw_mmu 1345 # define helper_ret_stl_mmu helper_le_stl_mmu 1346 # define helper_ret_stq_mmu helper_le_stq_mmu 1347 #endif 1348 1349 uint32_t helper_atomic_cmpxchgb_mmu(CPUArchState *env, target_ulong addr, 1350 uint32_t cmpv, uint32_t newv, 1351 TCGMemOpIdx oi, uintptr_t retaddr); 1352 uint32_t helper_atomic_cmpxchgw_le_mmu(CPUArchState *env, target_ulong addr, 1353 uint32_t cmpv, uint32_t newv, 1354 TCGMemOpIdx oi, uintptr_t retaddr); 1355 uint32_t helper_atomic_cmpxchgl_le_mmu(CPUArchState *env, target_ulong addr, 1356 uint32_t cmpv, uint32_t newv, 1357 TCGMemOpIdx oi, uintptr_t retaddr); 1358 uint64_t helper_atomic_cmpxchgq_le_mmu(CPUArchState *env, target_ulong addr, 1359 uint64_t cmpv, uint64_t newv, 1360 TCGMemOpIdx oi, uintptr_t retaddr); 1361 uint32_t helper_atomic_cmpxchgw_be_mmu(CPUArchState *env, target_ulong addr, 1362 uint32_t cmpv, uint32_t newv, 1363 TCGMemOpIdx oi, uintptr_t retaddr); 1364 uint32_t helper_atomic_cmpxchgl_be_mmu(CPUArchState *env, target_ulong addr, 1365 uint32_t cmpv, uint32_t newv, 1366 TCGMemOpIdx oi, uintptr_t retaddr); 1367 uint64_t helper_atomic_cmpxchgq_be_mmu(CPUArchState *env, target_ulong addr, 1368 uint64_t cmpv, uint64_t newv, 1369 TCGMemOpIdx oi, uintptr_t retaddr); 1370 1371 #define GEN_ATOMIC_HELPER(NAME, TYPE, SUFFIX) \ 1372 TYPE helper_atomic_ ## NAME ## SUFFIX ## _mmu \ 1373 (CPUArchState *env, target_ulong addr, TYPE val, \ 1374 TCGMemOpIdx oi, uintptr_t retaddr); 1375 1376 #ifdef CONFIG_ATOMIC64 1377 #define GEN_ATOMIC_HELPER_ALL(NAME) \ 1378 GEN_ATOMIC_HELPER(NAME, uint32_t, b) \ 1379 GEN_ATOMIC_HELPER(NAME, uint32_t, w_le) \ 1380 GEN_ATOMIC_HELPER(NAME, uint32_t, w_be) \ 1381 GEN_ATOMIC_HELPER(NAME, uint32_t, l_le) \ 1382 GEN_ATOMIC_HELPER(NAME, uint32_t, l_be) \ 1383 GEN_ATOMIC_HELPER(NAME, uint64_t, q_le) \ 1384 GEN_ATOMIC_HELPER(NAME, uint64_t, q_be) 1385 #else 1386 #define GEN_ATOMIC_HELPER_ALL(NAME) \ 1387 GEN_ATOMIC_HELPER(NAME, uint32_t, b) \ 1388 GEN_ATOMIC_HELPER(NAME, uint32_t, w_le) \ 1389 GEN_ATOMIC_HELPER(NAME, uint32_t, w_be) \ 1390 GEN_ATOMIC_HELPER(NAME, uint32_t, l_le) \ 1391 GEN_ATOMIC_HELPER(NAME, uint32_t, l_be) 1392 #endif 1393 1394 GEN_ATOMIC_HELPER_ALL(fetch_add) 1395 GEN_ATOMIC_HELPER_ALL(fetch_sub) 1396 GEN_ATOMIC_HELPER_ALL(fetch_and) 1397 GEN_ATOMIC_HELPER_ALL(fetch_or) 1398 GEN_ATOMIC_HELPER_ALL(fetch_xor) 1399 GEN_ATOMIC_HELPER_ALL(fetch_smin) 1400 GEN_ATOMIC_HELPER_ALL(fetch_umin) 1401 GEN_ATOMIC_HELPER_ALL(fetch_smax) 1402 GEN_ATOMIC_HELPER_ALL(fetch_umax) 1403 1404 GEN_ATOMIC_HELPER_ALL(add_fetch) 1405 GEN_ATOMIC_HELPER_ALL(sub_fetch) 1406 GEN_ATOMIC_HELPER_ALL(and_fetch) 1407 GEN_ATOMIC_HELPER_ALL(or_fetch) 1408 GEN_ATOMIC_HELPER_ALL(xor_fetch) 1409 GEN_ATOMIC_HELPER_ALL(smin_fetch) 1410 GEN_ATOMIC_HELPER_ALL(umin_fetch) 1411 GEN_ATOMIC_HELPER_ALL(smax_fetch) 1412 GEN_ATOMIC_HELPER_ALL(umax_fetch) 1413 1414 GEN_ATOMIC_HELPER_ALL(xchg) 1415 1416 #undef GEN_ATOMIC_HELPER_ALL 1417 #undef GEN_ATOMIC_HELPER 1418 #endif /* CONFIG_SOFTMMU */ 1419 1420 /* 1421 * These aren't really a "proper" helpers because TCG cannot manage Int128. 1422 * However, use the same format as the others, for use by the backends. 1423 * 1424 * The cmpxchg functions are only defined if HAVE_CMPXCHG128; 1425 * the ld/st functions are only defined if HAVE_ATOMIC128, 1426 * as defined by <qemu/atomic128.h>. 1427 */ 1428 Int128 helper_atomic_cmpxchgo_le_mmu(CPUArchState *env, target_ulong addr, 1429 Int128 cmpv, Int128 newv, 1430 TCGMemOpIdx oi, uintptr_t retaddr); 1431 Int128 helper_atomic_cmpxchgo_be_mmu(CPUArchState *env, target_ulong addr, 1432 Int128 cmpv, Int128 newv, 1433 TCGMemOpIdx oi, uintptr_t retaddr); 1434 1435 Int128 helper_atomic_ldo_le_mmu(CPUArchState *env, target_ulong addr, 1436 TCGMemOpIdx oi, uintptr_t retaddr); 1437 Int128 helper_atomic_ldo_be_mmu(CPUArchState *env, target_ulong addr, 1438 TCGMemOpIdx oi, uintptr_t retaddr); 1439 void helper_atomic_sto_le_mmu(CPUArchState *env, target_ulong addr, Int128 val, 1440 TCGMemOpIdx oi, uintptr_t retaddr); 1441 void helper_atomic_sto_be_mmu(CPUArchState *env, target_ulong addr, Int128 val, 1442 TCGMemOpIdx oi, uintptr_t retaddr); 1443 1444 #ifdef CONFIG_DEBUG_TCG 1445 void tcg_assert_listed_vecop(TCGOpcode); 1446 #else 1447 static inline void tcg_assert_listed_vecop(TCGOpcode op) { } 1448 #endif 1449 1450 static inline const TCGOpcode *tcg_swap_vecop_list(const TCGOpcode *n) 1451 { 1452 #ifdef CONFIG_DEBUG_TCG 1453 const TCGOpcode *o = tcg_ctx->vecop_list; 1454 tcg_ctx->vecop_list = n; 1455 return o; 1456 #else 1457 return NULL; 1458 #endif 1459 } 1460 1461 bool tcg_can_emit_vecop_list(const TCGOpcode *, TCGType, unsigned); 1462 1463 #endif /* TCG_H */ 1464