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 "exec/tb-context.h" 31 #include "qemu/bitops.h" 32 #include "qemu/plugin.h" 33 #include "qemu/queue.h" 34 #include "tcg/tcg-mo.h" 35 #include "tcg-target.h" 36 #include "qemu/int128.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 57 /* Default target word size to pointer size. */ 58 #ifndef TCG_TARGET_REG_BITS 59 # if UINTPTR_MAX == UINT32_MAX 60 # define TCG_TARGET_REG_BITS 32 61 # elif UINTPTR_MAX == UINT64_MAX 62 # define TCG_TARGET_REG_BITS 64 63 # else 64 # error Unknown pointer size for tcg target 65 # endif 66 #endif 67 68 #if TCG_TARGET_REG_BITS == 32 69 typedef int32_t tcg_target_long; 70 typedef uint32_t tcg_target_ulong; 71 #define TCG_PRIlx PRIx32 72 #define TCG_PRIld PRId32 73 #elif TCG_TARGET_REG_BITS == 64 74 typedef int64_t tcg_target_long; 75 typedef uint64_t tcg_target_ulong; 76 #define TCG_PRIlx PRIx64 77 #define TCG_PRIld PRId64 78 #else 79 #error unsupported 80 #endif 81 82 /* Oversized TCG guests make things like MTTCG hard 83 * as we can't use atomics for cputlb updates. 84 */ 85 #if TARGET_LONG_BITS > TCG_TARGET_REG_BITS 86 #define TCG_OVERSIZED_GUEST 1 87 #else 88 #define TCG_OVERSIZED_GUEST 0 89 #endif 90 91 #if TCG_TARGET_NB_REGS <= 32 92 typedef uint32_t TCGRegSet; 93 #elif TCG_TARGET_NB_REGS <= 64 94 typedef uint64_t TCGRegSet; 95 #else 96 #error unsupported 97 #endif 98 99 #if TCG_TARGET_REG_BITS == 32 100 /* Turn some undef macros into false macros. */ 101 #define TCG_TARGET_HAS_extrl_i64_i32 0 102 #define TCG_TARGET_HAS_extrh_i64_i32 0 103 #define TCG_TARGET_HAS_div_i64 0 104 #define TCG_TARGET_HAS_rem_i64 0 105 #define TCG_TARGET_HAS_div2_i64 0 106 #define TCG_TARGET_HAS_rot_i64 0 107 #define TCG_TARGET_HAS_ext8s_i64 0 108 #define TCG_TARGET_HAS_ext16s_i64 0 109 #define TCG_TARGET_HAS_ext32s_i64 0 110 #define TCG_TARGET_HAS_ext8u_i64 0 111 #define TCG_TARGET_HAS_ext16u_i64 0 112 #define TCG_TARGET_HAS_ext32u_i64 0 113 #define TCG_TARGET_HAS_bswap16_i64 0 114 #define TCG_TARGET_HAS_bswap32_i64 0 115 #define TCG_TARGET_HAS_bswap64_i64 0 116 #define TCG_TARGET_HAS_neg_i64 0 117 #define TCG_TARGET_HAS_not_i64 0 118 #define TCG_TARGET_HAS_andc_i64 0 119 #define TCG_TARGET_HAS_orc_i64 0 120 #define TCG_TARGET_HAS_eqv_i64 0 121 #define TCG_TARGET_HAS_nand_i64 0 122 #define TCG_TARGET_HAS_nor_i64 0 123 #define TCG_TARGET_HAS_clz_i64 0 124 #define TCG_TARGET_HAS_ctz_i64 0 125 #define TCG_TARGET_HAS_ctpop_i64 0 126 #define TCG_TARGET_HAS_deposit_i64 0 127 #define TCG_TARGET_HAS_extract_i64 0 128 #define TCG_TARGET_HAS_sextract_i64 0 129 #define TCG_TARGET_HAS_extract2_i64 0 130 #define TCG_TARGET_HAS_movcond_i64 0 131 #define TCG_TARGET_HAS_add2_i64 0 132 #define TCG_TARGET_HAS_sub2_i64 0 133 #define TCG_TARGET_HAS_mulu2_i64 0 134 #define TCG_TARGET_HAS_muls2_i64 0 135 #define TCG_TARGET_HAS_muluh_i64 0 136 #define TCG_TARGET_HAS_mulsh_i64 0 137 /* Turn some undef macros into true macros. */ 138 #define TCG_TARGET_HAS_add2_i32 1 139 #define TCG_TARGET_HAS_sub2_i32 1 140 #endif 141 142 #ifndef TCG_TARGET_deposit_i32_valid 143 #define TCG_TARGET_deposit_i32_valid(ofs, len) 1 144 #endif 145 #ifndef TCG_TARGET_deposit_i64_valid 146 #define TCG_TARGET_deposit_i64_valid(ofs, len) 1 147 #endif 148 #ifndef TCG_TARGET_extract_i32_valid 149 #define TCG_TARGET_extract_i32_valid(ofs, len) 1 150 #endif 151 #ifndef TCG_TARGET_extract_i64_valid 152 #define TCG_TARGET_extract_i64_valid(ofs, len) 1 153 #endif 154 155 /* Only one of DIV or DIV2 should be defined. */ 156 #if defined(TCG_TARGET_HAS_div_i32) 157 #define TCG_TARGET_HAS_div2_i32 0 158 #elif defined(TCG_TARGET_HAS_div2_i32) 159 #define TCG_TARGET_HAS_div_i32 0 160 #define TCG_TARGET_HAS_rem_i32 0 161 #endif 162 #if defined(TCG_TARGET_HAS_div_i64) 163 #define TCG_TARGET_HAS_div2_i64 0 164 #elif defined(TCG_TARGET_HAS_div2_i64) 165 #define TCG_TARGET_HAS_div_i64 0 166 #define TCG_TARGET_HAS_rem_i64 0 167 #endif 168 169 /* For 32-bit targets, some sort of unsigned widening multiply is required. */ 170 #if TCG_TARGET_REG_BITS == 32 \ 171 && !(defined(TCG_TARGET_HAS_mulu2_i32) \ 172 || defined(TCG_TARGET_HAS_muluh_i32)) 173 # error "Missing unsigned widening multiply" 174 #endif 175 176 #if !defined(TCG_TARGET_HAS_v64) \ 177 && !defined(TCG_TARGET_HAS_v128) \ 178 && !defined(TCG_TARGET_HAS_v256) 179 #define TCG_TARGET_MAYBE_vec 0 180 #define TCG_TARGET_HAS_abs_vec 0 181 #define TCG_TARGET_HAS_neg_vec 0 182 #define TCG_TARGET_HAS_not_vec 0 183 #define TCG_TARGET_HAS_andc_vec 0 184 #define TCG_TARGET_HAS_orc_vec 0 185 #define TCG_TARGET_HAS_roti_vec 0 186 #define TCG_TARGET_HAS_rots_vec 0 187 #define TCG_TARGET_HAS_rotv_vec 0 188 #define TCG_TARGET_HAS_shi_vec 0 189 #define TCG_TARGET_HAS_shs_vec 0 190 #define TCG_TARGET_HAS_shv_vec 0 191 #define TCG_TARGET_HAS_mul_vec 0 192 #define TCG_TARGET_HAS_sat_vec 0 193 #define TCG_TARGET_HAS_minmax_vec 0 194 #define TCG_TARGET_HAS_bitsel_vec 0 195 #define TCG_TARGET_HAS_cmpsel_vec 0 196 #else 197 #define TCG_TARGET_MAYBE_vec 1 198 #endif 199 #ifndef TCG_TARGET_HAS_v64 200 #define TCG_TARGET_HAS_v64 0 201 #endif 202 #ifndef TCG_TARGET_HAS_v128 203 #define TCG_TARGET_HAS_v128 0 204 #endif 205 #ifndef TCG_TARGET_HAS_v256 206 #define TCG_TARGET_HAS_v256 0 207 #endif 208 209 #ifndef TARGET_INSN_START_EXTRA_WORDS 210 # define TARGET_INSN_START_WORDS 1 211 #else 212 # define TARGET_INSN_START_WORDS (1 + TARGET_INSN_START_EXTRA_WORDS) 213 #endif 214 215 typedef enum TCGOpcode { 216 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name, 217 #include "tcg/tcg-opc.h" 218 #undef DEF 219 NB_OPS, 220 } TCGOpcode; 221 222 #define tcg_regset_set_reg(d, r) ((d) |= (TCGRegSet)1 << (r)) 223 #define tcg_regset_reset_reg(d, r) ((d) &= ~((TCGRegSet)1 << (r))) 224 #define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1) 225 226 #ifndef TCG_TARGET_INSN_UNIT_SIZE 227 # error "Missing TCG_TARGET_INSN_UNIT_SIZE" 228 #elif TCG_TARGET_INSN_UNIT_SIZE == 1 229 typedef uint8_t tcg_insn_unit; 230 #elif TCG_TARGET_INSN_UNIT_SIZE == 2 231 typedef uint16_t tcg_insn_unit; 232 #elif TCG_TARGET_INSN_UNIT_SIZE == 4 233 typedef uint32_t tcg_insn_unit; 234 #elif TCG_TARGET_INSN_UNIT_SIZE == 8 235 typedef uint64_t tcg_insn_unit; 236 #else 237 /* The port better have done this. */ 238 #endif 239 240 241 #if defined CONFIG_DEBUG_TCG || defined QEMU_STATIC_ANALYSIS 242 # define tcg_debug_assert(X) do { assert(X); } while (0) 243 #else 244 # define tcg_debug_assert(X) \ 245 do { if (!(X)) { __builtin_unreachable(); } } while (0) 246 #endif 247 248 typedef struct TCGRelocation TCGRelocation; 249 struct TCGRelocation { 250 QSIMPLEQ_ENTRY(TCGRelocation) next; 251 tcg_insn_unit *ptr; 252 intptr_t addend; 253 int type; 254 }; 255 256 typedef struct TCGLabel TCGLabel; 257 struct TCGLabel { 258 unsigned present : 1; 259 unsigned has_value : 1; 260 unsigned id : 14; 261 unsigned refs : 16; 262 union { 263 uintptr_t value; 264 const tcg_insn_unit *value_ptr; 265 } u; 266 QSIMPLEQ_HEAD(, TCGRelocation) relocs; 267 QSIMPLEQ_ENTRY(TCGLabel) next; 268 }; 269 270 typedef struct TCGPool { 271 struct TCGPool *next; 272 int size; 273 uint8_t data[] __attribute__ ((aligned)); 274 } TCGPool; 275 276 #define TCG_POOL_CHUNK_SIZE 32768 277 278 #define TCG_MAX_TEMPS 512 279 #define TCG_MAX_INSNS 512 280 281 /* when the size of the arguments of a called function is smaller than 282 this value, they are statically allocated in the TB stack frame */ 283 #define TCG_STATIC_CALL_ARGS_SIZE 128 284 285 typedef enum TCGType { 286 TCG_TYPE_I32, 287 TCG_TYPE_I64, 288 289 TCG_TYPE_V64, 290 TCG_TYPE_V128, 291 TCG_TYPE_V256, 292 293 TCG_TYPE_COUNT, /* number of different types */ 294 295 /* An alias for the size of the host register. */ 296 #if TCG_TARGET_REG_BITS == 32 297 TCG_TYPE_REG = TCG_TYPE_I32, 298 #else 299 TCG_TYPE_REG = TCG_TYPE_I64, 300 #endif 301 302 /* An alias for the size of the native pointer. */ 303 #if UINTPTR_MAX == UINT32_MAX 304 TCG_TYPE_PTR = TCG_TYPE_I32, 305 #else 306 TCG_TYPE_PTR = TCG_TYPE_I64, 307 #endif 308 309 /* An alias for the size of the target "long", aka register. */ 310 #if TARGET_LONG_BITS == 64 311 TCG_TYPE_TL = TCG_TYPE_I64, 312 #else 313 TCG_TYPE_TL = TCG_TYPE_I32, 314 #endif 315 } TCGType; 316 317 /** 318 * get_alignment_bits 319 * @memop: MemOp value 320 * 321 * Extract the alignment size from the memop. 322 */ 323 static inline unsigned get_alignment_bits(MemOp memop) 324 { 325 unsigned a = memop & MO_AMASK; 326 327 if (a == MO_UNALN) { 328 /* No alignment required. */ 329 a = 0; 330 } else if (a == MO_ALIGN) { 331 /* A natural alignment requirement. */ 332 a = memop & MO_SIZE; 333 } else { 334 /* A specific alignment requirement. */ 335 a = a >> MO_ASHIFT; 336 } 337 #if defined(CONFIG_SOFTMMU) 338 /* The requested alignment cannot overlap the TLB flags. */ 339 tcg_debug_assert((TLB_FLAGS_MASK & ((1 << a) - 1)) == 0); 340 #endif 341 return a; 342 } 343 344 typedef tcg_target_ulong TCGArg; 345 346 /* Define type and accessor macros for TCG variables. 347 348 TCG variables are the inputs and outputs of TCG ops, as described 349 in tcg/README. Target CPU front-end code uses these types to deal 350 with TCG variables as it emits TCG code via the tcg_gen_* functions. 351 They come in several flavours: 352 * TCGv_i32 : 32 bit integer type 353 * TCGv_i64 : 64 bit integer type 354 * TCGv_ptr : a host pointer type 355 * TCGv_vec : a host vector type; the exact size is not exposed 356 to the CPU front-end code. 357 * TCGv : an integer type the same size as target_ulong 358 (an alias for either TCGv_i32 or TCGv_i64) 359 The compiler's type checking will complain if you mix them 360 up and pass the wrong sized TCGv to a function. 361 362 Users of tcg_gen_* don't need to know about any of the internal 363 details of these, and should treat them as opaque types. 364 You won't be able to look inside them in a debugger either. 365 366 Internal implementation details follow: 367 368 Note that there is no definition of the structs TCGv_i32_d etc anywhere. 369 This is deliberate, because the values we store in variables of type 370 TCGv_i32 are not really pointers-to-structures. They're just small 371 integers, but keeping them in pointer types like this means that the 372 compiler will complain if you accidentally pass a TCGv_i32 to a 373 function which takes a TCGv_i64, and so on. Only the internals of 374 TCG need to care about the actual contents of the types. */ 375 376 typedef struct TCGv_i32_d *TCGv_i32; 377 typedef struct TCGv_i64_d *TCGv_i64; 378 typedef struct TCGv_ptr_d *TCGv_ptr; 379 typedef struct TCGv_vec_d *TCGv_vec; 380 typedef TCGv_ptr TCGv_env; 381 #if TARGET_LONG_BITS == 32 382 #define TCGv TCGv_i32 383 #elif TARGET_LONG_BITS == 64 384 #define TCGv TCGv_i64 385 #else 386 #error Unhandled TARGET_LONG_BITS value 387 #endif 388 389 /* call flags */ 390 /* Helper does not read globals (either directly or through an exception). It 391 implies TCG_CALL_NO_WRITE_GLOBALS. */ 392 #define TCG_CALL_NO_READ_GLOBALS 0x0001 393 /* Helper does not write globals */ 394 #define TCG_CALL_NO_WRITE_GLOBALS 0x0002 395 /* Helper can be safely suppressed if the return value is not used. */ 396 #define TCG_CALL_NO_SIDE_EFFECTS 0x0004 397 /* Helper is QEMU_NORETURN. */ 398 #define TCG_CALL_NO_RETURN 0x0008 399 400 /* convenience version of most used call flags */ 401 #define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS 402 #define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS 403 #define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS 404 #define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE) 405 #define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE) 406 407 /* Used to align parameters. See the comment before tcgv_i32_temp. */ 408 #define TCG_CALL_DUMMY_ARG ((TCGArg)0) 409 410 /* Conditions. Note that these are laid out for easy manipulation by 411 the functions below: 412 bit 0 is used for inverting; 413 bit 1 is signed, 414 bit 2 is unsigned, 415 bit 3 is used with bit 0 for swapping signed/unsigned. */ 416 typedef enum { 417 /* non-signed */ 418 TCG_COND_NEVER = 0 | 0 | 0 | 0, 419 TCG_COND_ALWAYS = 0 | 0 | 0 | 1, 420 TCG_COND_EQ = 8 | 0 | 0 | 0, 421 TCG_COND_NE = 8 | 0 | 0 | 1, 422 /* signed */ 423 TCG_COND_LT = 0 | 0 | 2 | 0, 424 TCG_COND_GE = 0 | 0 | 2 | 1, 425 TCG_COND_LE = 8 | 0 | 2 | 0, 426 TCG_COND_GT = 8 | 0 | 2 | 1, 427 /* unsigned */ 428 TCG_COND_LTU = 0 | 4 | 0 | 0, 429 TCG_COND_GEU = 0 | 4 | 0 | 1, 430 TCG_COND_LEU = 8 | 4 | 0 | 0, 431 TCG_COND_GTU = 8 | 4 | 0 | 1, 432 } TCGCond; 433 434 /* Invert the sense of the comparison. */ 435 static inline TCGCond tcg_invert_cond(TCGCond c) 436 { 437 return (TCGCond)(c ^ 1); 438 } 439 440 /* Swap the operands in a comparison. */ 441 static inline TCGCond tcg_swap_cond(TCGCond c) 442 { 443 return c & 6 ? (TCGCond)(c ^ 9) : c; 444 } 445 446 /* Create an "unsigned" version of a "signed" comparison. */ 447 static inline TCGCond tcg_unsigned_cond(TCGCond c) 448 { 449 return c & 2 ? (TCGCond)(c ^ 6) : c; 450 } 451 452 /* Create a "signed" version of an "unsigned" comparison. */ 453 static inline TCGCond tcg_signed_cond(TCGCond c) 454 { 455 return c & 4 ? (TCGCond)(c ^ 6) : c; 456 } 457 458 /* Must a comparison be considered unsigned? */ 459 static inline bool is_unsigned_cond(TCGCond c) 460 { 461 return (c & 4) != 0; 462 } 463 464 /* Create a "high" version of a double-word comparison. 465 This removes equality from a LTE or GTE comparison. */ 466 static inline TCGCond tcg_high_cond(TCGCond c) 467 { 468 switch (c) { 469 case TCG_COND_GE: 470 case TCG_COND_LE: 471 case TCG_COND_GEU: 472 case TCG_COND_LEU: 473 return (TCGCond)(c ^ 8); 474 default: 475 return c; 476 } 477 } 478 479 typedef enum TCGTempVal { 480 TEMP_VAL_DEAD, 481 TEMP_VAL_REG, 482 TEMP_VAL_MEM, 483 TEMP_VAL_CONST, 484 } TCGTempVal; 485 486 typedef struct TCGTemp { 487 TCGReg reg:8; 488 TCGTempVal val_type:8; 489 TCGType base_type:8; 490 TCGType type:8; 491 unsigned int fixed_reg:1; 492 unsigned int indirect_reg:1; 493 unsigned int indirect_base:1; 494 unsigned int mem_coherent:1; 495 unsigned int mem_allocated:1; 496 /* If true, the temp is saved across both basic blocks and 497 translation blocks. */ 498 unsigned int temp_global:1; 499 /* If true, the temp is saved across basic blocks but dead 500 at the end of translation blocks. If false, the temp is 501 dead at the end of basic blocks. */ 502 unsigned int temp_local:1; 503 unsigned int temp_allocated:1; 504 505 tcg_target_long val; 506 struct TCGTemp *mem_base; 507 intptr_t mem_offset; 508 const char *name; 509 510 /* Pass-specific information that can be stored for a temporary. 511 One word worth of integer data, and one pointer to data 512 allocated separately. */ 513 uintptr_t state; 514 void *state_ptr; 515 } TCGTemp; 516 517 typedef struct TCGContext TCGContext; 518 519 typedef struct TCGTempSet { 520 unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)]; 521 } TCGTempSet; 522 523 /* While we limit helpers to 6 arguments, for 32-bit hosts, with padding, 524 this imples a max of 6*2 (64-bit in) + 2 (64-bit out) = 14 operands. 525 There are never more than 2 outputs, which means that we can store all 526 dead + sync data within 16 bits. */ 527 #define DEAD_ARG 4 528 #define SYNC_ARG 1 529 typedef uint16_t TCGLifeData; 530 531 /* The layout here is designed to avoid a bitfield crossing of 532 a 32-bit boundary, which would cause GCC to add extra padding. */ 533 typedef struct TCGOp { 534 TCGOpcode opc : 8; /* 8 */ 535 536 /* Parameters for this opcode. See below. */ 537 unsigned param1 : 4; /* 12 */ 538 unsigned param2 : 4; /* 16 */ 539 540 /* Lifetime data of the operands. */ 541 unsigned life : 16; /* 32 */ 542 543 /* Next and previous opcodes. */ 544 QTAILQ_ENTRY(TCGOp) link; 545 #ifdef CONFIG_PLUGIN 546 QSIMPLEQ_ENTRY(TCGOp) plugin_link; 547 #endif 548 549 /* Arguments for the opcode. */ 550 TCGArg args[MAX_OPC_PARAM]; 551 552 /* Register preferences for the output(s). */ 553 TCGRegSet output_pref[2]; 554 } TCGOp; 555 556 #define TCGOP_CALLI(X) (X)->param1 557 #define TCGOP_CALLO(X) (X)->param2 558 559 #define TCGOP_VECL(X) (X)->param1 560 #define TCGOP_VECE(X) (X)->param2 561 562 /* Make sure operands fit in the bitfields above. */ 563 QEMU_BUILD_BUG_ON(NB_OPS > (1 << 8)); 564 565 typedef struct TCGProfile { 566 int64_t cpu_exec_time; 567 int64_t tb_count1; 568 int64_t tb_count; 569 int64_t op_count; /* total insn count */ 570 int op_count_max; /* max insn per TB */ 571 int temp_count_max; 572 int64_t temp_count; 573 int64_t del_op_count; 574 int64_t code_in_len; 575 int64_t code_out_len; 576 int64_t search_out_len; 577 int64_t interm_time; 578 int64_t code_time; 579 int64_t la_time; 580 int64_t opt_time; 581 int64_t restore_count; 582 int64_t restore_time; 583 int64_t table_op_count[NB_OPS]; 584 } TCGProfile; 585 586 struct TCGContext { 587 uint8_t *pool_cur, *pool_end; 588 TCGPool *pool_first, *pool_current, *pool_first_large; 589 int nb_labels; 590 int nb_globals; 591 int nb_temps; 592 int nb_indirects; 593 int nb_ops; 594 595 /* goto_tb support */ 596 tcg_insn_unit *code_buf; 597 uint16_t *tb_jmp_reset_offset; /* tb->jmp_reset_offset */ 598 uintptr_t *tb_jmp_insn_offset; /* tb->jmp_target_arg if direct_jump */ 599 uintptr_t *tb_jmp_target_addr; /* tb->jmp_target_arg if !direct_jump */ 600 601 TCGRegSet reserved_regs; 602 uint32_t tb_cflags; /* cflags of the current TB */ 603 intptr_t current_frame_offset; 604 intptr_t frame_start; 605 intptr_t frame_end; 606 TCGTemp *frame_temp; 607 608 tcg_insn_unit *code_ptr; 609 610 #ifdef CONFIG_PROFILER 611 TCGProfile prof; 612 #endif 613 614 #ifdef CONFIG_DEBUG_TCG 615 int temps_in_use; 616 int goto_tb_issue_mask; 617 const TCGOpcode *vecop_list; 618 #endif 619 620 /* Code generation. Note that we specifically do not use tcg_insn_unit 621 here, because there's too much arithmetic throughout that relies 622 on addition and subtraction working on bytes. Rely on the GCC 623 extension that allows arithmetic on void*. */ 624 void *code_gen_buffer; 625 size_t code_gen_buffer_size; 626 void *code_gen_ptr; 627 void *data_gen_ptr; 628 629 /* Threshold to flush the translated code buffer. */ 630 void *code_gen_highwater; 631 632 size_t tb_phys_invalidate_count; 633 634 /* Track which vCPU triggers events */ 635 CPUState *cpu; /* *_trans */ 636 637 /* These structures are private to tcg-target.c.inc. */ 638 #ifdef TCG_TARGET_NEED_LDST_LABELS 639 QSIMPLEQ_HEAD(, TCGLabelQemuLdst) ldst_labels; 640 #endif 641 #ifdef TCG_TARGET_NEED_POOL_LABELS 642 struct TCGLabelPoolData *pool_labels; 643 #endif 644 645 TCGLabel *exitreq_label; 646 647 #ifdef CONFIG_PLUGIN 648 /* 649 * We keep one plugin_tb struct per TCGContext. Note that on every TB 650 * translation we clear but do not free its contents; this way we 651 * avoid a lot of malloc/free churn, since after a few TB's it's 652 * unlikely that we'll need to allocate either more instructions or more 653 * space for instructions (for variable-instruction-length ISAs). 654 */ 655 struct qemu_plugin_tb *plugin_tb; 656 657 /* descriptor of the instruction being translated */ 658 struct qemu_plugin_insn *plugin_insn; 659 660 /* list to quickly access the injected ops */ 661 QSIMPLEQ_HEAD(, TCGOp) plugin_ops; 662 #endif 663 664 TCGTempSet free_temps[TCG_TYPE_COUNT * 2]; 665 TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */ 666 667 QTAILQ_HEAD(, TCGOp) ops, free_ops; 668 QSIMPLEQ_HEAD(, TCGLabel) labels; 669 670 /* Tells which temporary holds a given register. 671 It does not take into account fixed registers */ 672 TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS]; 673 674 uint16_t gen_insn_end_off[TCG_MAX_INSNS]; 675 target_ulong gen_insn_data[TCG_MAX_INSNS][TARGET_INSN_START_WORDS]; 676 }; 677 678 extern TCGContext tcg_init_ctx; 679 extern __thread TCGContext *tcg_ctx; 680 extern const void *tcg_code_gen_epilogue; 681 extern uintptr_t tcg_splitwx_diff; 682 extern TCGv_env cpu_env; 683 684 static inline bool in_code_gen_buffer(const void *p) 685 { 686 const TCGContext *s = &tcg_init_ctx; 687 /* 688 * Much like it is valid to have a pointer to the byte past the 689 * end of an array (so long as you don't dereference it), allow 690 * a pointer to the byte past the end of the code gen buffer. 691 */ 692 return (size_t)(p - s->code_gen_buffer) <= s->code_gen_buffer_size; 693 } 694 695 #ifdef CONFIG_DEBUG_TCG 696 const void *tcg_splitwx_to_rx(void *rw); 697 void *tcg_splitwx_to_rw(const void *rx); 698 #else 699 static inline const void *tcg_splitwx_to_rx(void *rw) 700 { 701 return rw ? rw + tcg_splitwx_diff : NULL; 702 } 703 704 static inline void *tcg_splitwx_to_rw(const void *rx) 705 { 706 return rx ? (void *)rx - tcg_splitwx_diff : NULL; 707 } 708 #endif 709 710 static inline size_t temp_idx(TCGTemp *ts) 711 { 712 ptrdiff_t n = ts - tcg_ctx->temps; 713 tcg_debug_assert(n >= 0 && n < tcg_ctx->nb_temps); 714 return n; 715 } 716 717 static inline TCGArg temp_arg(TCGTemp *ts) 718 { 719 return (uintptr_t)ts; 720 } 721 722 static inline TCGTemp *arg_temp(TCGArg a) 723 { 724 return (TCGTemp *)(uintptr_t)a; 725 } 726 727 /* Using the offset of a temporary, relative to TCGContext, rather than 728 its index means that we don't use 0. That leaves offset 0 free for 729 a NULL representation without having to leave index 0 unused. */ 730 static inline TCGTemp *tcgv_i32_temp(TCGv_i32 v) 731 { 732 uintptr_t o = (uintptr_t)v; 733 TCGTemp *t = (void *)tcg_ctx + o; 734 tcg_debug_assert(offsetof(TCGContext, temps[temp_idx(t)]) == o); 735 return t; 736 } 737 738 static inline TCGTemp *tcgv_i64_temp(TCGv_i64 v) 739 { 740 return tcgv_i32_temp((TCGv_i32)v); 741 } 742 743 static inline TCGTemp *tcgv_ptr_temp(TCGv_ptr v) 744 { 745 return tcgv_i32_temp((TCGv_i32)v); 746 } 747 748 static inline TCGTemp *tcgv_vec_temp(TCGv_vec v) 749 { 750 return tcgv_i32_temp((TCGv_i32)v); 751 } 752 753 static inline TCGArg tcgv_i32_arg(TCGv_i32 v) 754 { 755 return temp_arg(tcgv_i32_temp(v)); 756 } 757 758 static inline TCGArg tcgv_i64_arg(TCGv_i64 v) 759 { 760 return temp_arg(tcgv_i64_temp(v)); 761 } 762 763 static inline TCGArg tcgv_ptr_arg(TCGv_ptr v) 764 { 765 return temp_arg(tcgv_ptr_temp(v)); 766 } 767 768 static inline TCGArg tcgv_vec_arg(TCGv_vec v) 769 { 770 return temp_arg(tcgv_vec_temp(v)); 771 } 772 773 static inline TCGv_i32 temp_tcgv_i32(TCGTemp *t) 774 { 775 (void)temp_idx(t); /* trigger embedded assert */ 776 return (TCGv_i32)((void *)t - (void *)tcg_ctx); 777 } 778 779 static inline TCGv_i64 temp_tcgv_i64(TCGTemp *t) 780 { 781 return (TCGv_i64)temp_tcgv_i32(t); 782 } 783 784 static inline TCGv_ptr temp_tcgv_ptr(TCGTemp *t) 785 { 786 return (TCGv_ptr)temp_tcgv_i32(t); 787 } 788 789 static inline TCGv_vec temp_tcgv_vec(TCGTemp *t) 790 { 791 return (TCGv_vec)temp_tcgv_i32(t); 792 } 793 794 #if TCG_TARGET_REG_BITS == 32 795 static inline TCGv_i32 TCGV_LOW(TCGv_i64 t) 796 { 797 return temp_tcgv_i32(tcgv_i64_temp(t)); 798 } 799 800 static inline TCGv_i32 TCGV_HIGH(TCGv_i64 t) 801 { 802 return temp_tcgv_i32(tcgv_i64_temp(t) + 1); 803 } 804 #endif 805 806 static inline TCGArg tcg_get_insn_param(TCGOp *op, int arg) 807 { 808 return op->args[arg]; 809 } 810 811 static inline void tcg_set_insn_param(TCGOp *op, int arg, TCGArg v) 812 { 813 op->args[arg] = v; 814 } 815 816 static inline target_ulong tcg_get_insn_start_param(TCGOp *op, int arg) 817 { 818 #if TARGET_LONG_BITS <= TCG_TARGET_REG_BITS 819 return tcg_get_insn_param(op, arg); 820 #else 821 return tcg_get_insn_param(op, arg * 2) | 822 ((uint64_t)tcg_get_insn_param(op, arg * 2 + 1) << 32); 823 #endif 824 } 825 826 static inline void tcg_set_insn_start_param(TCGOp *op, int arg, target_ulong v) 827 { 828 #if TARGET_LONG_BITS <= TCG_TARGET_REG_BITS 829 tcg_set_insn_param(op, arg, v); 830 #else 831 tcg_set_insn_param(op, arg * 2, v); 832 tcg_set_insn_param(op, arg * 2 + 1, v >> 32); 833 #endif 834 } 835 836 /* The last op that was emitted. */ 837 static inline TCGOp *tcg_last_op(void) 838 { 839 return QTAILQ_LAST(&tcg_ctx->ops); 840 } 841 842 /* Test for whether to terminate the TB for using too many opcodes. */ 843 static inline bool tcg_op_buf_full(void) 844 { 845 /* This is not a hard limit, it merely stops translation when 846 * we have produced "enough" opcodes. We want to limit TB size 847 * such that a RISC host can reasonably use a 16-bit signed 848 * branch within the TB. We also need to be mindful of the 849 * 16-bit unsigned offsets, TranslationBlock.jmp_reset_offset[] 850 * and TCGContext.gen_insn_end_off[]. 851 */ 852 return tcg_ctx->nb_ops >= 4000; 853 } 854 855 /* pool based memory allocation */ 856 857 /* user-mode: mmap_lock must be held for tcg_malloc_internal. */ 858 void *tcg_malloc_internal(TCGContext *s, int size); 859 void tcg_pool_reset(TCGContext *s); 860 TranslationBlock *tcg_tb_alloc(TCGContext *s); 861 862 void tcg_region_init(void); 863 void tb_destroy(TranslationBlock *tb); 864 void tcg_region_reset_all(void); 865 866 size_t tcg_code_size(void); 867 size_t tcg_code_capacity(void); 868 869 void tcg_tb_insert(TranslationBlock *tb); 870 void tcg_tb_remove(TranslationBlock *tb); 871 size_t tcg_tb_phys_invalidate_count(void); 872 TranslationBlock *tcg_tb_lookup(uintptr_t tc_ptr); 873 void tcg_tb_foreach(GTraverseFunc func, gpointer user_data); 874 size_t tcg_nb_tbs(void); 875 876 /* user-mode: Called with mmap_lock held. */ 877 static inline void *tcg_malloc(int size) 878 { 879 TCGContext *s = tcg_ctx; 880 uint8_t *ptr, *ptr_end; 881 882 /* ??? This is a weak placeholder for minimum malloc alignment. */ 883 size = QEMU_ALIGN_UP(size, 8); 884 885 ptr = s->pool_cur; 886 ptr_end = ptr + size; 887 if (unlikely(ptr_end > s->pool_end)) { 888 return tcg_malloc_internal(tcg_ctx, size); 889 } else { 890 s->pool_cur = ptr_end; 891 return ptr; 892 } 893 } 894 895 void tcg_context_init(TCGContext *s); 896 void tcg_register_thread(void); 897 void tcg_prologue_init(TCGContext *s); 898 void tcg_func_start(TCGContext *s); 899 900 int tcg_gen_code(TCGContext *s, TranslationBlock *tb); 901 902 void tcg_set_frame(TCGContext *s, TCGReg reg, intptr_t start, intptr_t size); 903 904 TCGTemp *tcg_global_mem_new_internal(TCGType, TCGv_ptr, 905 intptr_t, const char *); 906 TCGTemp *tcg_temp_new_internal(TCGType, bool); 907 void tcg_temp_free_internal(TCGTemp *); 908 TCGv_vec tcg_temp_new_vec(TCGType type); 909 TCGv_vec tcg_temp_new_vec_matching(TCGv_vec match); 910 911 static inline void tcg_temp_free_i32(TCGv_i32 arg) 912 { 913 tcg_temp_free_internal(tcgv_i32_temp(arg)); 914 } 915 916 static inline void tcg_temp_free_i64(TCGv_i64 arg) 917 { 918 tcg_temp_free_internal(tcgv_i64_temp(arg)); 919 } 920 921 static inline void tcg_temp_free_ptr(TCGv_ptr arg) 922 { 923 tcg_temp_free_internal(tcgv_ptr_temp(arg)); 924 } 925 926 static inline void tcg_temp_free_vec(TCGv_vec arg) 927 { 928 tcg_temp_free_internal(tcgv_vec_temp(arg)); 929 } 930 931 static inline TCGv_i32 tcg_global_mem_new_i32(TCGv_ptr reg, intptr_t offset, 932 const char *name) 933 { 934 TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_I32, reg, offset, name); 935 return temp_tcgv_i32(t); 936 } 937 938 static inline TCGv_i32 tcg_temp_new_i32(void) 939 { 940 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I32, false); 941 return temp_tcgv_i32(t); 942 } 943 944 static inline TCGv_i32 tcg_temp_local_new_i32(void) 945 { 946 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I32, true); 947 return temp_tcgv_i32(t); 948 } 949 950 static inline TCGv_i64 tcg_global_mem_new_i64(TCGv_ptr reg, intptr_t offset, 951 const char *name) 952 { 953 TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_I64, reg, offset, name); 954 return temp_tcgv_i64(t); 955 } 956 957 static inline TCGv_i64 tcg_temp_new_i64(void) 958 { 959 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I64, false); 960 return temp_tcgv_i64(t); 961 } 962 963 static inline TCGv_i64 tcg_temp_local_new_i64(void) 964 { 965 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I64, true); 966 return temp_tcgv_i64(t); 967 } 968 969 static inline TCGv_ptr tcg_global_mem_new_ptr(TCGv_ptr reg, intptr_t offset, 970 const char *name) 971 { 972 TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_PTR, reg, offset, name); 973 return temp_tcgv_ptr(t); 974 } 975 976 static inline TCGv_ptr tcg_temp_new_ptr(void) 977 { 978 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_PTR, false); 979 return temp_tcgv_ptr(t); 980 } 981 982 static inline TCGv_ptr tcg_temp_local_new_ptr(void) 983 { 984 TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_PTR, true); 985 return temp_tcgv_ptr(t); 986 } 987 988 #if defined(CONFIG_DEBUG_TCG) 989 /* If you call tcg_clear_temp_count() at the start of a section of 990 * code which is not supposed to leak any TCG temporaries, then 991 * calling tcg_check_temp_count() at the end of the section will 992 * return 1 if the section did in fact leak a temporary. 993 */ 994 void tcg_clear_temp_count(void); 995 int tcg_check_temp_count(void); 996 #else 997 #define tcg_clear_temp_count() do { } while (0) 998 #define tcg_check_temp_count() 0 999 #endif 1000 1001 int64_t tcg_cpu_exec_time(void); 1002 void tcg_dump_info(void); 1003 void tcg_dump_op_count(void); 1004 1005 #define TCG_CT_CONST 1 /* any constant of register size */ 1006 1007 typedef struct TCGArgConstraint { 1008 unsigned ct : 16; 1009 unsigned alias_index : 4; 1010 unsigned sort_index : 4; 1011 bool oalias : 1; 1012 bool ialias : 1; 1013 bool newreg : 1; 1014 TCGRegSet regs; 1015 } TCGArgConstraint; 1016 1017 #define TCG_MAX_OP_ARGS 16 1018 1019 /* Bits for TCGOpDef->flags, 8 bits available, all used. */ 1020 enum { 1021 /* Instruction exits the translation block. */ 1022 TCG_OPF_BB_EXIT = 0x01, 1023 /* Instruction defines the end of a basic block. */ 1024 TCG_OPF_BB_END = 0x02, 1025 /* Instruction clobbers call registers and potentially update globals. */ 1026 TCG_OPF_CALL_CLOBBER = 0x04, 1027 /* Instruction has side effects: it cannot be removed if its outputs 1028 are not used, and might trigger exceptions. */ 1029 TCG_OPF_SIDE_EFFECTS = 0x08, 1030 /* Instruction operands are 64-bits (otherwise 32-bits). */ 1031 TCG_OPF_64BIT = 0x10, 1032 /* Instruction is optional and not implemented by the host, or insn 1033 is generic and should not be implemened by the host. */ 1034 TCG_OPF_NOT_PRESENT = 0x20, 1035 /* Instruction operands are vectors. */ 1036 TCG_OPF_VECTOR = 0x40, 1037 /* Instruction is a conditional branch. */ 1038 TCG_OPF_COND_BRANCH = 0x80 1039 }; 1040 1041 typedef struct TCGOpDef { 1042 const char *name; 1043 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args; 1044 uint8_t flags; 1045 TCGArgConstraint *args_ct; 1046 } TCGOpDef; 1047 1048 extern TCGOpDef tcg_op_defs[]; 1049 extern const size_t tcg_op_defs_max; 1050 1051 typedef struct TCGTargetOpDef { 1052 TCGOpcode op; 1053 const char *args_ct_str[TCG_MAX_OP_ARGS]; 1054 } TCGTargetOpDef; 1055 1056 #define tcg_abort() \ 1057 do {\ 1058 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\ 1059 abort();\ 1060 } while (0) 1061 1062 bool tcg_op_supported(TCGOpcode op); 1063 1064 void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args); 1065 1066 TCGOp *tcg_emit_op(TCGOpcode opc); 1067 void tcg_op_remove(TCGContext *s, TCGOp *op); 1068 TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *op, TCGOpcode opc); 1069 TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *op, TCGOpcode opc); 1070 1071 void tcg_optimize(TCGContext *s); 1072 1073 TCGv_i32 tcg_const_i32(int32_t val); 1074 TCGv_i64 tcg_const_i64(int64_t val); 1075 TCGv_i32 tcg_const_local_i32(int32_t val); 1076 TCGv_i64 tcg_const_local_i64(int64_t val); 1077 TCGv_vec tcg_const_zeros_vec(TCGType); 1078 TCGv_vec tcg_const_ones_vec(TCGType); 1079 TCGv_vec tcg_const_zeros_vec_matching(TCGv_vec); 1080 TCGv_vec tcg_const_ones_vec_matching(TCGv_vec); 1081 1082 #if UINTPTR_MAX == UINT32_MAX 1083 # define tcg_const_ptr(x) ((TCGv_ptr)tcg_const_i32((intptr_t)(x))) 1084 # define tcg_const_local_ptr(x) ((TCGv_ptr)tcg_const_local_i32((intptr_t)(x))) 1085 #else 1086 # define tcg_const_ptr(x) ((TCGv_ptr)tcg_const_i64((intptr_t)(x))) 1087 # define tcg_const_local_ptr(x) ((TCGv_ptr)tcg_const_local_i64((intptr_t)(x))) 1088 #endif 1089 1090 TCGLabel *gen_new_label(void); 1091 1092 /** 1093 * label_arg 1094 * @l: label 1095 * 1096 * Encode a label for storage in the TCG opcode stream. 1097 */ 1098 1099 static inline TCGArg label_arg(TCGLabel *l) 1100 { 1101 return (uintptr_t)l; 1102 } 1103 1104 /** 1105 * arg_label 1106 * @i: value 1107 * 1108 * The opposite of label_arg. Retrieve a label from the 1109 * encoding of the TCG opcode stream. 1110 */ 1111 1112 static inline TCGLabel *arg_label(TCGArg i) 1113 { 1114 return (TCGLabel *)(uintptr_t)i; 1115 } 1116 1117 /** 1118 * tcg_ptr_byte_diff 1119 * @a, @b: addresses to be differenced 1120 * 1121 * There are many places within the TCG backends where we need a byte 1122 * difference between two pointers. While this can be accomplished 1123 * with local casting, it's easy to get wrong -- especially if one is 1124 * concerned with the signedness of the result. 1125 * 1126 * This version relies on GCC's void pointer arithmetic to get the 1127 * correct result. 1128 */ 1129 1130 static inline ptrdiff_t tcg_ptr_byte_diff(const void *a, const void *b) 1131 { 1132 return a - b; 1133 } 1134 1135 /** 1136 * tcg_pcrel_diff 1137 * @s: the tcg context 1138 * @target: address of the target 1139 * 1140 * Produce a pc-relative difference, from the current code_ptr 1141 * to the destination address. 1142 */ 1143 1144 static inline ptrdiff_t tcg_pcrel_diff(TCGContext *s, const void *target) 1145 { 1146 return tcg_ptr_byte_diff(target, tcg_splitwx_to_rx(s->code_ptr)); 1147 } 1148 1149 /** 1150 * tcg_tbrel_diff 1151 * @s: the tcg context 1152 * @target: address of the target 1153 * 1154 * Produce a difference, from the beginning of the current TB code 1155 * to the destination address. 1156 */ 1157 static inline ptrdiff_t tcg_tbrel_diff(TCGContext *s, const void *target) 1158 { 1159 return tcg_ptr_byte_diff(target, tcg_splitwx_to_rx(s->code_buf)); 1160 } 1161 1162 /** 1163 * tcg_current_code_size 1164 * @s: the tcg context 1165 * 1166 * Compute the current code size within the translation block. 1167 * This is used to fill in qemu's data structures for goto_tb. 1168 */ 1169 1170 static inline size_t tcg_current_code_size(TCGContext *s) 1171 { 1172 return tcg_ptr_byte_diff(s->code_ptr, s->code_buf); 1173 } 1174 1175 /* Combine the MemOp and mmu_idx parameters into a single value. */ 1176 typedef uint32_t TCGMemOpIdx; 1177 1178 /** 1179 * make_memop_idx 1180 * @op: memory operation 1181 * @idx: mmu index 1182 * 1183 * Encode these values into a single parameter. 1184 */ 1185 static inline TCGMemOpIdx make_memop_idx(MemOp op, unsigned idx) 1186 { 1187 tcg_debug_assert(idx <= 15); 1188 return (op << 4) | idx; 1189 } 1190 1191 /** 1192 * get_memop 1193 * @oi: combined op/idx parameter 1194 * 1195 * Extract the memory operation from the combined value. 1196 */ 1197 static inline MemOp get_memop(TCGMemOpIdx oi) 1198 { 1199 return oi >> 4; 1200 } 1201 1202 /** 1203 * get_mmuidx 1204 * @oi: combined op/idx parameter 1205 * 1206 * Extract the mmu index from the combined value. 1207 */ 1208 static inline unsigned get_mmuidx(TCGMemOpIdx oi) 1209 { 1210 return oi & 15; 1211 } 1212 1213 /** 1214 * tcg_qemu_tb_exec: 1215 * @env: pointer to CPUArchState for the CPU 1216 * @tb_ptr: address of generated code for the TB to execute 1217 * 1218 * Start executing code from a given translation block. 1219 * Where translation blocks have been linked, execution 1220 * may proceed from the given TB into successive ones. 1221 * Control eventually returns only when some action is needed 1222 * from the top-level loop: either control must pass to a TB 1223 * which has not yet been directly linked, or an asynchronous 1224 * event such as an interrupt needs handling. 1225 * 1226 * Return: The return value is the value passed to the corresponding 1227 * tcg_gen_exit_tb() at translation time of the last TB attempted to execute. 1228 * The value is either zero or a 4-byte aligned pointer to that TB combined 1229 * with additional information in its two least significant bits. The 1230 * additional information is encoded as follows: 1231 * 0, 1: the link between this TB and the next is via the specified 1232 * TB index (0 or 1). That is, we left the TB via (the equivalent 1233 * of) "goto_tb <index>". The main loop uses this to determine 1234 * how to link the TB just executed to the next. 1235 * 2: we are using instruction counting code generation, and we 1236 * did not start executing this TB because the instruction counter 1237 * would hit zero midway through it. In this case the pointer 1238 * returned is the TB we were about to execute, and the caller must 1239 * arrange to execute the remaining count of instructions. 1240 * 3: we stopped because the CPU's exit_request flag was set 1241 * (usually meaning that there is an interrupt that needs to be 1242 * handled). The pointer returned is the TB we were about to execute 1243 * when we noticed the pending exit request. 1244 * 1245 * If the bottom two bits indicate an exit-via-index then the CPU 1246 * state is correctly synchronised and ready for execution of the next 1247 * TB (and in particular the guest PC is the address to execute next). 1248 * Otherwise, we gave up on execution of this TB before it started, and 1249 * the caller must fix up the CPU state by calling the CPU's 1250 * synchronize_from_tb() method with the TB pointer we return (falling 1251 * back to calling the CPU's set_pc method with tb->pb if no 1252 * synchronize_from_tb() method exists). 1253 * 1254 * Note that TCG targets may use a different definition of tcg_qemu_tb_exec 1255 * to this default (which just calls the prologue.code emitted by 1256 * tcg_target_qemu_prologue()). 1257 */ 1258 #define TB_EXIT_MASK 3 1259 #define TB_EXIT_IDX0 0 1260 #define TB_EXIT_IDX1 1 1261 #define TB_EXIT_IDXMAX 1 1262 #define TB_EXIT_REQUESTED 3 1263 1264 #ifdef CONFIG_TCG_INTERPRETER 1265 uintptr_t tcg_qemu_tb_exec(CPUArchState *env, const void *tb_ptr); 1266 #else 1267 typedef uintptr_t tcg_prologue_fn(CPUArchState *env, const void *tb_ptr); 1268 extern tcg_prologue_fn *tcg_qemu_tb_exec; 1269 #endif 1270 1271 void tcg_register_jit(const void *buf, size_t buf_size); 1272 1273 #if TCG_TARGET_MAYBE_vec 1274 /* Return zero if the tuple (opc, type, vece) is unsupportable; 1275 return > 0 if it is directly supportable; 1276 return < 0 if we must call tcg_expand_vec_op. */ 1277 int tcg_can_emit_vec_op(TCGOpcode, TCGType, unsigned); 1278 #else 1279 static inline int tcg_can_emit_vec_op(TCGOpcode o, TCGType t, unsigned ve) 1280 { 1281 return 0; 1282 } 1283 #endif 1284 1285 /* Expand the tuple (opc, type, vece) on the given arguments. */ 1286 void tcg_expand_vec_op(TCGOpcode, TCGType, unsigned, TCGArg, ...); 1287 1288 /* Replicate a constant C accoring to the log2 of the element size. */ 1289 uint64_t dup_const(unsigned vece, uint64_t c); 1290 1291 #define dup_const(VECE, C) \ 1292 (__builtin_constant_p(VECE) \ 1293 ? ( (VECE) == MO_8 ? 0x0101010101010101ull * (uint8_t)(C) \ 1294 : (VECE) == MO_16 ? 0x0001000100010001ull * (uint16_t)(C) \ 1295 : (VECE) == MO_32 ? 0x0000000100000001ull * (uint32_t)(C) \ 1296 : dup_const(VECE, C)) \ 1297 : dup_const(VECE, C)) 1298 1299 1300 /* 1301 * Memory helpers that will be used by TCG generated code. 1302 */ 1303 #ifdef CONFIG_SOFTMMU 1304 /* Value zero-extended to tcg register size. */ 1305 tcg_target_ulong helper_ret_ldub_mmu(CPUArchState *env, target_ulong addr, 1306 TCGMemOpIdx oi, uintptr_t retaddr); 1307 tcg_target_ulong helper_le_lduw_mmu(CPUArchState *env, target_ulong addr, 1308 TCGMemOpIdx oi, uintptr_t retaddr); 1309 tcg_target_ulong helper_le_ldul_mmu(CPUArchState *env, target_ulong addr, 1310 TCGMemOpIdx oi, uintptr_t retaddr); 1311 uint64_t helper_le_ldq_mmu(CPUArchState *env, target_ulong addr, 1312 TCGMemOpIdx oi, uintptr_t retaddr); 1313 tcg_target_ulong helper_be_lduw_mmu(CPUArchState *env, target_ulong addr, 1314 TCGMemOpIdx oi, uintptr_t retaddr); 1315 tcg_target_ulong helper_be_ldul_mmu(CPUArchState *env, target_ulong addr, 1316 TCGMemOpIdx oi, uintptr_t retaddr); 1317 uint64_t helper_be_ldq_mmu(CPUArchState *env, target_ulong addr, 1318 TCGMemOpIdx oi, uintptr_t retaddr); 1319 1320 /* Value sign-extended to tcg register size. */ 1321 tcg_target_ulong helper_ret_ldsb_mmu(CPUArchState *env, target_ulong addr, 1322 TCGMemOpIdx oi, uintptr_t retaddr); 1323 tcg_target_ulong helper_le_ldsw_mmu(CPUArchState *env, target_ulong addr, 1324 TCGMemOpIdx oi, uintptr_t retaddr); 1325 tcg_target_ulong helper_le_ldsl_mmu(CPUArchState *env, target_ulong addr, 1326 TCGMemOpIdx oi, uintptr_t retaddr); 1327 tcg_target_ulong helper_be_ldsw_mmu(CPUArchState *env, target_ulong addr, 1328 TCGMemOpIdx oi, uintptr_t retaddr); 1329 tcg_target_ulong helper_be_ldsl_mmu(CPUArchState *env, target_ulong addr, 1330 TCGMemOpIdx oi, uintptr_t retaddr); 1331 1332 void helper_ret_stb_mmu(CPUArchState *env, target_ulong addr, uint8_t val, 1333 TCGMemOpIdx oi, uintptr_t retaddr); 1334 void helper_le_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val, 1335 TCGMemOpIdx oi, uintptr_t retaddr); 1336 void helper_le_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val, 1337 TCGMemOpIdx oi, uintptr_t retaddr); 1338 void helper_le_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val, 1339 TCGMemOpIdx oi, uintptr_t retaddr); 1340 void helper_be_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val, 1341 TCGMemOpIdx oi, uintptr_t retaddr); 1342 void helper_be_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val, 1343 TCGMemOpIdx oi, uintptr_t retaddr); 1344 void helper_be_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val, 1345 TCGMemOpIdx oi, uintptr_t retaddr); 1346 1347 /* Temporary aliases until backends are converted. */ 1348 #ifdef TARGET_WORDS_BIGENDIAN 1349 # define helper_ret_ldsw_mmu helper_be_ldsw_mmu 1350 # define helper_ret_lduw_mmu helper_be_lduw_mmu 1351 # define helper_ret_ldsl_mmu helper_be_ldsl_mmu 1352 # define helper_ret_ldul_mmu helper_be_ldul_mmu 1353 # define helper_ret_ldl_mmu helper_be_ldul_mmu 1354 # define helper_ret_ldq_mmu helper_be_ldq_mmu 1355 # define helper_ret_stw_mmu helper_be_stw_mmu 1356 # define helper_ret_stl_mmu helper_be_stl_mmu 1357 # define helper_ret_stq_mmu helper_be_stq_mmu 1358 #else 1359 # define helper_ret_ldsw_mmu helper_le_ldsw_mmu 1360 # define helper_ret_lduw_mmu helper_le_lduw_mmu 1361 # define helper_ret_ldsl_mmu helper_le_ldsl_mmu 1362 # define helper_ret_ldul_mmu helper_le_ldul_mmu 1363 # define helper_ret_ldl_mmu helper_le_ldul_mmu 1364 # define helper_ret_ldq_mmu helper_le_ldq_mmu 1365 # define helper_ret_stw_mmu helper_le_stw_mmu 1366 # define helper_ret_stl_mmu helper_le_stl_mmu 1367 # define helper_ret_stq_mmu helper_le_stq_mmu 1368 #endif 1369 1370 uint32_t helper_atomic_cmpxchgb_mmu(CPUArchState *env, target_ulong addr, 1371 uint32_t cmpv, uint32_t newv, 1372 TCGMemOpIdx oi, uintptr_t retaddr); 1373 uint32_t helper_atomic_cmpxchgw_le_mmu(CPUArchState *env, target_ulong addr, 1374 uint32_t cmpv, uint32_t newv, 1375 TCGMemOpIdx oi, uintptr_t retaddr); 1376 uint32_t helper_atomic_cmpxchgl_le_mmu(CPUArchState *env, target_ulong addr, 1377 uint32_t cmpv, uint32_t newv, 1378 TCGMemOpIdx oi, uintptr_t retaddr); 1379 uint64_t helper_atomic_cmpxchgq_le_mmu(CPUArchState *env, target_ulong addr, 1380 uint64_t cmpv, uint64_t newv, 1381 TCGMemOpIdx oi, uintptr_t retaddr); 1382 uint32_t helper_atomic_cmpxchgw_be_mmu(CPUArchState *env, target_ulong addr, 1383 uint32_t cmpv, uint32_t newv, 1384 TCGMemOpIdx oi, uintptr_t retaddr); 1385 uint32_t helper_atomic_cmpxchgl_be_mmu(CPUArchState *env, target_ulong addr, 1386 uint32_t cmpv, uint32_t newv, 1387 TCGMemOpIdx oi, uintptr_t retaddr); 1388 uint64_t helper_atomic_cmpxchgq_be_mmu(CPUArchState *env, target_ulong addr, 1389 uint64_t cmpv, uint64_t newv, 1390 TCGMemOpIdx oi, uintptr_t retaddr); 1391 1392 #define GEN_ATOMIC_HELPER(NAME, TYPE, SUFFIX) \ 1393 TYPE helper_atomic_ ## NAME ## SUFFIX ## _mmu \ 1394 (CPUArchState *env, target_ulong addr, TYPE val, \ 1395 TCGMemOpIdx oi, uintptr_t retaddr); 1396 1397 #ifdef CONFIG_ATOMIC64 1398 #define GEN_ATOMIC_HELPER_ALL(NAME) \ 1399 GEN_ATOMIC_HELPER(NAME, uint32_t, b) \ 1400 GEN_ATOMIC_HELPER(NAME, uint32_t, w_le) \ 1401 GEN_ATOMIC_HELPER(NAME, uint32_t, w_be) \ 1402 GEN_ATOMIC_HELPER(NAME, uint32_t, l_le) \ 1403 GEN_ATOMIC_HELPER(NAME, uint32_t, l_be) \ 1404 GEN_ATOMIC_HELPER(NAME, uint64_t, q_le) \ 1405 GEN_ATOMIC_HELPER(NAME, uint64_t, q_be) 1406 #else 1407 #define GEN_ATOMIC_HELPER_ALL(NAME) \ 1408 GEN_ATOMIC_HELPER(NAME, uint32_t, b) \ 1409 GEN_ATOMIC_HELPER(NAME, uint32_t, w_le) \ 1410 GEN_ATOMIC_HELPER(NAME, uint32_t, w_be) \ 1411 GEN_ATOMIC_HELPER(NAME, uint32_t, l_le) \ 1412 GEN_ATOMIC_HELPER(NAME, uint32_t, l_be) 1413 #endif 1414 1415 GEN_ATOMIC_HELPER_ALL(fetch_add) 1416 GEN_ATOMIC_HELPER_ALL(fetch_sub) 1417 GEN_ATOMIC_HELPER_ALL(fetch_and) 1418 GEN_ATOMIC_HELPER_ALL(fetch_or) 1419 GEN_ATOMIC_HELPER_ALL(fetch_xor) 1420 GEN_ATOMIC_HELPER_ALL(fetch_smin) 1421 GEN_ATOMIC_HELPER_ALL(fetch_umin) 1422 GEN_ATOMIC_HELPER_ALL(fetch_smax) 1423 GEN_ATOMIC_HELPER_ALL(fetch_umax) 1424 1425 GEN_ATOMIC_HELPER_ALL(add_fetch) 1426 GEN_ATOMIC_HELPER_ALL(sub_fetch) 1427 GEN_ATOMIC_HELPER_ALL(and_fetch) 1428 GEN_ATOMIC_HELPER_ALL(or_fetch) 1429 GEN_ATOMIC_HELPER_ALL(xor_fetch) 1430 GEN_ATOMIC_HELPER_ALL(smin_fetch) 1431 GEN_ATOMIC_HELPER_ALL(umin_fetch) 1432 GEN_ATOMIC_HELPER_ALL(smax_fetch) 1433 GEN_ATOMIC_HELPER_ALL(umax_fetch) 1434 1435 GEN_ATOMIC_HELPER_ALL(xchg) 1436 1437 #undef GEN_ATOMIC_HELPER_ALL 1438 #undef GEN_ATOMIC_HELPER 1439 #endif /* CONFIG_SOFTMMU */ 1440 1441 /* 1442 * These aren't really a "proper" helpers because TCG cannot manage Int128. 1443 * However, use the same format as the others, for use by the backends. 1444 * 1445 * The cmpxchg functions are only defined if HAVE_CMPXCHG128; 1446 * the ld/st functions are only defined if HAVE_ATOMIC128, 1447 * as defined by <qemu/atomic128.h>. 1448 */ 1449 Int128 helper_atomic_cmpxchgo_le_mmu(CPUArchState *env, target_ulong addr, 1450 Int128 cmpv, Int128 newv, 1451 TCGMemOpIdx oi, uintptr_t retaddr); 1452 Int128 helper_atomic_cmpxchgo_be_mmu(CPUArchState *env, target_ulong addr, 1453 Int128 cmpv, Int128 newv, 1454 TCGMemOpIdx oi, uintptr_t retaddr); 1455 1456 Int128 helper_atomic_ldo_le_mmu(CPUArchState *env, target_ulong addr, 1457 TCGMemOpIdx oi, uintptr_t retaddr); 1458 Int128 helper_atomic_ldo_be_mmu(CPUArchState *env, target_ulong addr, 1459 TCGMemOpIdx oi, uintptr_t retaddr); 1460 void helper_atomic_sto_le_mmu(CPUArchState *env, target_ulong addr, Int128 val, 1461 TCGMemOpIdx oi, uintptr_t retaddr); 1462 void helper_atomic_sto_be_mmu(CPUArchState *env, target_ulong addr, Int128 val, 1463 TCGMemOpIdx oi, uintptr_t retaddr); 1464 1465 #ifdef CONFIG_DEBUG_TCG 1466 void tcg_assert_listed_vecop(TCGOpcode); 1467 #else 1468 static inline void tcg_assert_listed_vecop(TCGOpcode op) { } 1469 #endif 1470 1471 static inline const TCGOpcode *tcg_swap_vecop_list(const TCGOpcode *n) 1472 { 1473 #ifdef CONFIG_DEBUG_TCG 1474 const TCGOpcode *o = tcg_ctx->vecop_list; 1475 tcg_ctx->vecop_list = n; 1476 return o; 1477 #else 1478 return NULL; 1479 #endif 1480 } 1481 1482 bool tcg_can_emit_vecop_list(const TCGOpcode *, TCGType, unsigned); 1483 1484 #endif /* TCG_H */ 1485