tcg/tcg.h

   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 #include "qemu-common.h"
  25
  26 /* Target word size (must be identical to pointer size). */
  27 #if UINTPTR_MAX == UINT32_MAX
  28 # define TCG_TARGET_REG_BITS 32
  29 #elif UINTPTR_MAX == UINT64_MAX
  30 # define TCG_TARGET_REG_BITS 64
  31 #else
  32 # error Unknown pointer size for tcg target
  33 #endif
  34
  35 #if TCG_TARGET_REG_BITS == 32
  36 typedef int32_t tcg_target_long;
  37 typedef uint32_t tcg_target_ulong;
  38 #define TCG_PRIlx PRIx32
  39 #define TCG_PRIld PRId32
  40 #elif TCG_TARGET_REG_BITS == 64
  41 typedef int64_t tcg_target_long;
  42 typedef uint64_t tcg_target_ulong;
  43 #define TCG_PRIlx PRIx64
  44 #define TCG_PRIld PRId64
  45 #else
  46 #error unsupported
  47 #endif
  48
  49 #include "tcg-target.h"
  50 #include "tcg-runtime.h"
  51
  52 #if TCG_TARGET_NB_REGS <= 32
  53 typedef uint32_t TCGRegSet;
  54 #elif TCG_TARGET_NB_REGS <= 64
  55 typedef uint64_t TCGRegSet;
  56 #else
  57 #error unsupported
  58 #endif
  59
  60 /* Turn some undef macros into false macros.  */
  61 #if TCG_TARGET_REG_BITS == 32
  62 #define TCG_TARGET_HAS_div_i64          0
  63 #define TCG_TARGET_HAS_div2_i64         0
  64 #define TCG_TARGET_HAS_rot_i64          0
  65 #define TCG_TARGET_HAS_ext8s_i64        0
  66 #define TCG_TARGET_HAS_ext16s_i64       0
  67 #define TCG_TARGET_HAS_ext32s_i64       0
  68 #define TCG_TARGET_HAS_ext8u_i64        0
  69 #define TCG_TARGET_HAS_ext16u_i64       0
  70 #define TCG_TARGET_HAS_ext32u_i64       0
  71 #define TCG_TARGET_HAS_bswap16_i64      0
  72 #define TCG_TARGET_HAS_bswap32_i64      0
  73 #define TCG_TARGET_HAS_bswap64_i64      0
  74 #define TCG_TARGET_HAS_neg_i64          0
  75 #define TCG_TARGET_HAS_not_i64          0
  76 #define TCG_TARGET_HAS_andc_i64         0
  77 #define TCG_TARGET_HAS_orc_i64          0
  78 #define TCG_TARGET_HAS_eqv_i64          0
  79 #define TCG_TARGET_HAS_nand_i64         0
  80 #define TCG_TARGET_HAS_nor_i64          0
  81 #define TCG_TARGET_HAS_deposit_i64      0
  82 #define TCG_TARGET_HAS_movcond_i64      0
  83 #endif
  84
  85 #ifndef TCG_TARGET_deposit_i32_valid
  86 #define TCG_TARGET_deposit_i32_valid(ofs, len) 1
  87 #endif
  88 #ifndef TCG_TARGET_deposit_i64_valid
  89 #define TCG_TARGET_deposit_i64_valid(ofs, len) 1
  90 #endif
  91
  92 /* Only one of DIV or DIV2 should be defined.  */
  93 #if defined(TCG_TARGET_HAS_div_i32)
  94 #define TCG_TARGET_HAS_div2_i32         0
  95 #elif defined(TCG_TARGET_HAS_div2_i32)
  96 #define TCG_TARGET_HAS_div_i32          0
  97 #endif
  98 #if defined(TCG_TARGET_HAS_div_i64)
  99 #define TCG_TARGET_HAS_div2_i64         0
 100 #elif defined(TCG_TARGET_HAS_div2_i64)
 101 #define TCG_TARGET_HAS_div_i64          0
 102 #endif
 103
 104 typedef enum TCGOpcode {
 105 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
 106 #include "tcg-opc.h"
 107 #undef DEF
 108     NB_OPS,
 109 } TCGOpcode;
 110
 111 #define tcg_regset_clear(d) (d) = 0
 112 #define tcg_regset_set(d, s) (d) = (s)
 113 #define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
 114 #define tcg_regset_set_reg(d, r) (d) |= 1L << (r)
 115 #define tcg_regset_reset_reg(d, r) (d) &= ~(1L << (r))
 116 #define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
 117 #define tcg_regset_or(d, a, b) (d) = (a) | (b)
 118 #define tcg_regset_and(d, a, b) (d) = (a) & (b)
 119 #define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
 120 #define tcg_regset_not(d, a) (d) = ~(a)
 121
 122 typedef struct TCGRelocation {
 123     struct TCGRelocation *next;
 124     int type;
 125     uint8_t *ptr;
 126     tcg_target_long addend;
 127 } TCGRelocation;
 128
 129 typedef struct TCGLabel {
 130     int has_value;
 131     union {
 132         tcg_target_ulong value;
 133         TCGRelocation *first_reloc;
 134     } u;
 135 } TCGLabel;
 136
 137 typedef struct TCGPool {
 138     struct TCGPool *next;
 139     int size;
 140     uint8_t data[0] __attribute__ ((aligned));
 141 } TCGPool;
 142
 143 #define TCG_POOL_CHUNK_SIZE 32768
 144
 145 #define TCG_MAX_LABELS 512
 146
 147 #define TCG_MAX_TEMPS 512
 148
 149 /* when the size of the arguments of a called function is smaller than
 150    this value, they are statically allocated in the TB stack frame */
 151 #define TCG_STATIC_CALL_ARGS_SIZE 128
 152
 153 typedef enum TCGType {
 154     TCG_TYPE_I32,
 155     TCG_TYPE_I64,
 156     TCG_TYPE_COUNT, /* number of different types */
 157
 158     /* An alias for the size of the host register.  */
 159 #if TCG_TARGET_REG_BITS == 32
 160     TCG_TYPE_REG = TCG_TYPE_I32,
 161 #else
 162     TCG_TYPE_REG = TCG_TYPE_I64,
 163 #endif
 164
 165     /* An alias for the size of the native pointer.  We don't currently
 166        support any hosts with 64-bit registers and 32-bit pointers.  */
 167     TCG_TYPE_PTR = TCG_TYPE_REG,
 168
 169     /* An alias for the size of the target "long", aka register.  */
 170 #if TARGET_LONG_BITS == 64
 171     TCG_TYPE_TL = TCG_TYPE_I64,
 172 #else
 173     TCG_TYPE_TL = TCG_TYPE_I32,
 174 #endif
 175 } TCGType;
 176
 177 typedef tcg_target_ulong TCGArg;
 178
 179 /* Define a type and accessor macros for variables.  Using a struct is
 180    nice because it gives some level of type safely.  Ideally the compiler
 181    be able to see through all this.  However in practice this is not true,
 182    especially on targets with braindamaged ABIs (e.g. i386).
 183    We use plain int by default to avoid this runtime overhead.
 184    Users of tcg_gen_* don't need to know about any of this, and should
 185    treat TCGv as an opaque type.
 186    In addition we do typechecking for different types of variables.  TCGv_i32
 187    and TCGv_i64 are 32/64-bit variables respectively.  TCGv and TCGv_ptr
 188    are aliases for target_ulong and host pointer sized values respectively.
 189  */
 190
 191 #ifdef CONFIG_DEBUG_TCG
 192 #define DEBUG_TCGV 1
 193 #endif
 194
 195 #ifdef DEBUG_TCGV
 196
 197 typedef struct
 198 {
 199     int i32;
 200 } TCGv_i32;
 201
 202 typedef struct
 203 {
 204     int i64;
 205 } TCGv_i64;
 206
 207 typedef struct {
 208     int iptr;
 209 } TCGv_ptr;
 210
 211 #define MAKE_TCGV_I32(i) __extension__                  \
 212     ({ TCGv_i32 make_tcgv_tmp = {i}; make_tcgv_tmp;})
 213 #define MAKE_TCGV_I64(i) __extension__                  \
 214     ({ TCGv_i64 make_tcgv_tmp = {i}; make_tcgv_tmp;})
 215 #define MAKE_TCGV_PTR(i) __extension__                  \
 216     ({ TCGv_ptr make_tcgv_tmp = {i}; make_tcgv_tmp; })
 217 #define GET_TCGV_I32(t) ((t).i32)
 218 #define GET_TCGV_I64(t) ((t).i64)
 219 #define GET_TCGV_PTR(t) ((t).iptr)
 220 #if TCG_TARGET_REG_BITS == 32
 221 #define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
 222 #define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
 223 #endif
 224
 225 #else /* !DEBUG_TCGV */
 226
 227 typedef int TCGv_i32;
 228 typedef int TCGv_i64;
 229 #if TCG_TARGET_REG_BITS == 32
 230 #define TCGv_ptr TCGv_i32
 231 #else
 232 #define TCGv_ptr TCGv_i64
 233 #endif
 234 #define MAKE_TCGV_I32(x) (x)
 235 #define MAKE_TCGV_I64(x) (x)
 236 #define MAKE_TCGV_PTR(x) (x)
 237 #define GET_TCGV_I32(t) (t)
 238 #define GET_TCGV_I64(t) (t)
 239 #define GET_TCGV_PTR(t) (t)
 240
 241 #if TCG_TARGET_REG_BITS == 32
 242 #define TCGV_LOW(t) (t)
 243 #define TCGV_HIGH(t) ((t) + 1)
 244 #endif
 245
 246 #endif /* DEBUG_TCGV */
 247
 248 #define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
 249 #define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
 250
 251 /* Dummy definition to avoid compiler warnings.  */
 252 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
 253 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
 254
 255 /* call flags */
 256 /* A pure function only reads its arguments and TCG global variables
 257    and cannot raise exceptions. Hence a call to a pure function can be
 258    safely suppressed if the return value is not used. */
 259 #define TCG_CALL_PURE           0x0010
 260 /* A const function only reads its arguments and does not use TCG
 261    global variables. Hence a call to such a function does not
 262    save TCG global variables back to their canonical location. */
 263 #define TCG_CALL_CONST          0x0020
 264
 265 /* used to align parameters */
 266 #define TCG_CALL_DUMMY_TCGV     MAKE_TCGV_I32(-1)
 267 #define TCG_CALL_DUMMY_ARG      ((TCGArg)(-1))
 268
 269 /* Conditions.  Note that these are layed out for easy manipulation by
 270    the the functions below:
 271      bit 0 is used for inverting;
 272      bit 1 is signed,
 273      bit 2 is unsigned,
 274      bit 3 is used with bit 0 for swapping signed/unsigned.  */
 275 typedef enum {
 276     /* non-signed */
 277     TCG_COND_NEVER  = 0 | 0 | 0 | 0,
 278     TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
 279     TCG_COND_EQ     = 8 | 0 | 0 | 0,
 280     TCG_COND_NE     = 8 | 0 | 0 | 1,
 281     /* signed */
 282     TCG_COND_LT     = 0 | 0 | 2 | 0,
 283     TCG_COND_GE     = 0 | 0 | 2 | 1,
 284     TCG_COND_LE     = 8 | 0 | 2 | 0,
 285     TCG_COND_GT     = 8 | 0 | 2 | 1,
 286     /* unsigned */
 287     TCG_COND_LTU    = 0 | 4 | 0 | 0,
 288     TCG_COND_GEU    = 0 | 4 | 0 | 1,
 289     TCG_COND_LEU    = 8 | 4 | 0 | 0,
 290     TCG_COND_GTU    = 8 | 4 | 0 | 1,
 291 } TCGCond;
 292
 293 /* Invert the sense of the comparison.  */
 294 static inline TCGCond tcg_invert_cond(TCGCond c)
 295 {
 296     return (TCGCond)(c ^ 1);
 297 }
 298
 299 /* Swap the operands in a comparison.  */
 300 static inline TCGCond tcg_swap_cond(TCGCond c)
 301 {
 302     return c & 6 ? (TCGCond)(c ^ 9) : c;
 303 }
 304
 305 /* Create an "unsigned" version of a "signed" comparison.  */
 306 static inline TCGCond tcg_unsigned_cond(TCGCond c)
 307 {
 308     return c & 2 ? (TCGCond)(c ^ 6) : c;
 309 }
 310
 311 /* Must a comparison be considered unsigned?  */
 312 static inline bool is_unsigned_cond(TCGCond c)
 313 {
 314     return (c & 4) != 0;
 315 }
 316
 317 /* Create a "high" version of a double-word comparison.
 318    This removes equality from a LTE or GTE comparison.  */
 319 static inline TCGCond tcg_high_cond(TCGCond c)
 320 {
 321     switch (c) {
 322     case TCG_COND_GE:
 323     case TCG_COND_LE:
 324     case TCG_COND_GEU:
 325     case TCG_COND_LEU:
 326         return (TCGCond)(c ^ 8);
 327     default:
 328         return c;
 329     }
 330 }
 331
 332 #define TEMP_VAL_DEAD  0
 333 #define TEMP_VAL_REG   1
 334 #define TEMP_VAL_MEM   2
 335 #define TEMP_VAL_CONST 3
 336
 337 /* XXX: optimize memory layout */
 338 typedef struct TCGTemp {
 339     TCGType base_type;
 340     TCGType type;
 341     int val_type;
 342     int reg;
 343     tcg_target_long val;
 344     int mem_reg;
 345     tcg_target_long mem_offset;
 346     unsigned int fixed_reg:1;
 347     unsigned int mem_coherent:1;
 348     unsigned int mem_allocated:1;
 349     unsigned int temp_local:1; /* If true, the temp is saved across
 350                                   basic blocks. Otherwise, it is not
 351                                   preserved across basic blocks. */
 352     unsigned int temp_allocated:1; /* never used for code gen */
 353     /* index of next free temp of same base type, -1 if end */
 354     int next_free_temp;
 355     const char *name;
 356 } TCGTemp;
 357
 358 typedef struct TCGHelperInfo {
 359     tcg_target_ulong func;
 360     const char *name;
 361 } TCGHelperInfo;
 362
 363 typedef struct TCGContext TCGContext;
 364
 365 struct TCGContext {
 366     uint8_t *pool_cur, *pool_end;
 367     TCGPool *pool_first, *pool_current, *pool_first_large;
 368     TCGLabel *labels;
 369     int nb_labels;
 370     int nb_globals;
 371     int nb_temps;
 372     /* index of free temps, -1 if none */
 373     int first_free_temp[TCG_TYPE_COUNT * 2];
 374
 375     /* goto_tb support */
 376     uint8_t *code_buf;
 377     uintptr_t *tb_next;
 378     uint16_t *tb_next_offset;
 379     uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
 380
 381     /* liveness analysis */
 382     uint16_t *op_dead_args; /* for each operation, each bit tells if the
 383                                corresponding argument is dead */
 384     uint8_t *op_sync_args;  /* for each operation, each bit tells if the
 385                                corresponding output argument needs to be
 386                                sync to memory. */
 387
 388     /* tells in which temporary a given register is. It does not take
 389        into account fixed registers */
 390     int reg_to_temp[TCG_TARGET_NB_REGS];
 391     TCGRegSet reserved_regs;
 392     tcg_target_long current_frame_offset;
 393     tcg_target_long frame_start;
 394     tcg_target_long frame_end;
 395     int frame_reg;
 396
 397     uint8_t *code_ptr;
 398     TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
 399
 400     TCGHelperInfo *helpers;
 401     int nb_helpers;
 402     int allocated_helpers;
 403     int helpers_sorted;
 404
 405 #ifdef CONFIG_PROFILER
 406     /* profiling info */
 407     int64_t tb_count1;
 408     int64_t tb_count;
 409     int64_t op_count; /* total insn count */
 410     int op_count_max; /* max insn per TB */
 411     int64_t temp_count;
 412     int temp_count_max;
 413     int64_t del_op_count;
 414     int64_t code_in_len;
 415     int64_t code_out_len;
 416     int64_t interm_time;
 417     int64_t code_time;
 418     int64_t la_time;
 419     int64_t opt_time;
 420     int64_t restore_count;
 421     int64_t restore_time;
 422 #endif
 423
 424 #ifdef CONFIG_DEBUG_TCG
 425     int temps_in_use;
 426     int goto_tb_issue_mask;
 427 #endif
 428 };
 429
 430 extern TCGContext tcg_ctx;
 431 extern uint16_t *gen_opc_ptr;
 432 extern TCGArg *gen_opparam_ptr;
 433 extern uint16_t gen_opc_buf[];
 434 extern TCGArg gen_opparam_buf[];
 435
 436 /* pool based memory allocation */
 437
 438 void *tcg_malloc_internal(TCGContext *s, int size);
 439 void tcg_pool_reset(TCGContext *s);
 440 void tcg_pool_delete(TCGContext *s);
 441
 442 static inline void *tcg_malloc(int size)
 443 {
 444     TCGContext *s = &tcg_ctx;
 445     uint8_t *ptr, *ptr_end;
 446     size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
 447     ptr = s->pool_cur;
 448     ptr_end = ptr + size;
 449     if (unlikely(ptr_end > s->pool_end)) {
 450         return tcg_malloc_internal(&tcg_ctx, size);
 451     } else {
 452         s->pool_cur = ptr_end;
 453         return ptr;
 454     }
 455 }
 456
 457 void tcg_context_init(TCGContext *s);
 458 void tcg_prologue_init(TCGContext *s);
 459 void tcg_func_start(TCGContext *s);
 460
 461 int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf);
 462 int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);
 463
 464 void tcg_set_frame(TCGContext *s, int reg,
 465                    tcg_target_long start, tcg_target_long size);
 466
 467 TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
 468 TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
 469                                 const char *name);
 470 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
 471 static inline TCGv_i32 tcg_temp_new_i32(void)
 472 {
 473     return tcg_temp_new_internal_i32(0);
 474 }
 475 static inline TCGv_i32 tcg_temp_local_new_i32(void)
 476 {
 477     return tcg_temp_new_internal_i32(1);
 478 }
 479 void tcg_temp_free_i32(TCGv_i32 arg);
 480 char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
 481
 482 TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
 483 TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
 484                                 const char *name);
 485 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
 486 static inline TCGv_i64 tcg_temp_new_i64(void)
 487 {
 488     return tcg_temp_new_internal_i64(0);
 489 }
 490 static inline TCGv_i64 tcg_temp_local_new_i64(void)
 491 {
 492     return tcg_temp_new_internal_i64(1);
 493 }
 494 void tcg_temp_free_i64(TCGv_i64 arg);
 495 char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
 496
 497 #if defined(CONFIG_DEBUG_TCG)
 498 /* If you call tcg_clear_temp_count() at the start of a section of
 499  * code which is not supposed to leak any TCG temporaries, then
 500  * calling tcg_check_temp_count() at the end of the section will
 501  * return 1 if the section did in fact leak a temporary.
 502  */
 503 void tcg_clear_temp_count(void);
 504 int tcg_check_temp_count(void);
 505 #else
 506 #define tcg_clear_temp_count() do { } while (0)
 507 #define tcg_check_temp_count() 0
 508 #endif
 509
 510 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
 511
 512 #define TCG_CT_ALIAS  0x80
 513 #define TCG_CT_IALIAS 0x40
 514 #define TCG_CT_REG    0x01
 515 #define TCG_CT_CONST  0x02 /* any constant of register size */
 516
 517 typedef struct TCGArgConstraint {
 518     uint16_t ct;
 519     uint8_t alias_index;
 520     union {
 521         TCGRegSet regs;
 522     } u;
 523 } TCGArgConstraint;
 524
 525 #define TCG_MAX_OP_ARGS 16
 526
 527 /* Bits for TCGOpDef->flags, 8 bits available.  */
 528 enum {
 529     /* Instruction defines the end of a basic block.  */
 530     TCG_OPF_BB_END       = 0x01,
 531     /* Instruction clobbers call registers and potentially update globals.  */
 532     TCG_OPF_CALL_CLOBBER = 0x02,
 533     /* Instruction has side effects: it cannot be removed if its outputs
 534        are not used, and might trigger exceptions.  */
 535     TCG_OPF_SIDE_EFFECTS = 0x04,
 536     /* Instruction operands are 64-bits (otherwise 32-bits).  */
 537     TCG_OPF_64BIT        = 0x08,
 538     /* Instruction is optional and not implemented by the host.  */
 539     TCG_OPF_NOT_PRESENT  = 0x10,
 540 };
 541
 542 typedef struct TCGOpDef {
 543     const char *name;
 544     uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
 545     uint8_t flags;
 546     TCGArgConstraint *args_ct;
 547     int *sorted_args;
 548 #if defined(CONFIG_DEBUG_TCG)
 549     int used;
 550 #endif
 551 } TCGOpDef;
 552
 553 extern TCGOpDef tcg_op_defs[];
 554 extern const size_t tcg_op_defs_max;
 555
 556 typedef struct TCGTargetOpDef {
 557     TCGOpcode op;
 558     const char *args_ct_str[TCG_MAX_OP_ARGS];
 559 } TCGTargetOpDef;
 560
 561 #define tcg_abort() \
 562 do {\
 563     fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
 564     abort();\
 565 } while (0)
 566
 567 #ifdef CONFIG_DEBUG_TCG
 568 # define tcg_debug_assert(X) do { assert(X); } while (0)
 569 #elif QEMU_GNUC_PREREQ(4, 5)
 570 # define tcg_debug_assert(X) \
 571     do { if (!(X)) { __builtin_unreachable(); } } while (0)
 572 #else
 573 # define tcg_debug_assert(X) do { (void)(X); } while (0)
 574 #endif
 575
 576 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
 577
 578 #if TCG_TARGET_REG_BITS == 32
 579 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
 580 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
 581
 582 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((tcg_target_long)(V)))
 583 #define tcg_global_reg_new_ptr(R, N) \
 584     TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
 585 #define tcg_global_mem_new_ptr(R, O, N) \
 586     TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
 587 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
 588 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
 589 #else
 590 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
 591 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
 592
 593 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((tcg_target_long)(V)))
 594 #define tcg_global_reg_new_ptr(R, N) \
 595     TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
 596 #define tcg_global_mem_new_ptr(R, O, N) \
 597     TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
 598 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
 599 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
 600 #endif
 601
 602 void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
 603                    int sizemask, TCGArg ret, int nargs, TCGArg *args);
 604
 605 void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
 606                         int c, int right, int arith);
 607
 608 TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr, TCGArg *args,
 609                      TCGOpDef *tcg_op_def);
 610
 611 /* only used for debugging purposes */
 612 void tcg_register_helper(void *func, const char *name);
 613 const char *tcg_helper_get_name(TCGContext *s, void *func);
 614 void tcg_dump_ops(TCGContext *s);
 615
 616 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
 617 TCGv_i32 tcg_const_i32(int32_t val);
 618 TCGv_i64 tcg_const_i64(int64_t val);
 619 TCGv_i32 tcg_const_local_i32(int32_t val);
 620 TCGv_i64 tcg_const_local_i64(int64_t val);
 621
 622 extern uint8_t *code_gen_prologue;
 623
 624 /* TCG targets may use a different definition of tcg_qemu_tb_exec. */
 625 #if !defined(tcg_qemu_tb_exec)
 626 # define tcg_qemu_tb_exec(env, tb_ptr) \
 627     ((tcg_target_ulong (*)(void *, void *))code_gen_prologue)(env, tb_ptr)
 628 #endif
 629
 630 void tcg_register_jit(void *buf, size_t buf_size);