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 /* Helper does not read globals (either directly or through an exception). It
 257    implies TCG_CALL_NO_WRITE_GLOBALS. */
 258 #define TCG_CALL_NO_READ_GLOBALS    0x0010
 259 /* Helper does not write globals */
 260 #define TCG_CALL_NO_WRITE_GLOBALS   0x0020
 261 /* Helper can be safely suppressed if the return value is not used. */
 262 #define TCG_CALL_NO_SIDE_EFFECTS    0x0040
 263
 264 /* convenience version of most used call flags */
 265 #define TCG_CALL_NO_RWG         TCG_CALL_NO_READ_GLOBALS
 266 #define TCG_CALL_NO_WG          TCG_CALL_NO_WRITE_GLOBALS
 267 #define TCG_CALL_NO_SE          TCG_CALL_NO_SIDE_EFFECTS
 268 #define TCG_CALL_NO_RWG_SE      (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
 269 #define TCG_CALL_NO_WG_SE       (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
 270
 271 /* used to align parameters */
 272 #define TCG_CALL_DUMMY_TCGV     MAKE_TCGV_I32(-1)
 273 #define TCG_CALL_DUMMY_ARG      ((TCGArg)(-1))
 274
 275 /* Conditions.  Note that these are layed out for easy manipulation by
 276    the the functions below:
 277      bit 0 is used for inverting;
 278      bit 1 is signed,
 279      bit 2 is unsigned,
 280      bit 3 is used with bit 0 for swapping signed/unsigned.  */
 281 typedef enum {
 282     /* non-signed */
 283     TCG_COND_NEVER  = 0 | 0 | 0 | 0,
 284     TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
 285     TCG_COND_EQ     = 8 | 0 | 0 | 0,
 286     TCG_COND_NE     = 8 | 0 | 0 | 1,
 287     /* signed */
 288     TCG_COND_LT     = 0 | 0 | 2 | 0,
 289     TCG_COND_GE     = 0 | 0 | 2 | 1,
 290     TCG_COND_LE     = 8 | 0 | 2 | 0,
 291     TCG_COND_GT     = 8 | 0 | 2 | 1,
 292     /* unsigned */
 293     TCG_COND_LTU    = 0 | 4 | 0 | 0,
 294     TCG_COND_GEU    = 0 | 4 | 0 | 1,
 295     TCG_COND_LEU    = 8 | 4 | 0 | 0,
 296     TCG_COND_GTU    = 8 | 4 | 0 | 1,
 297 } TCGCond;
 298
 299 /* Invert the sense of the comparison.  */
 300 static inline TCGCond tcg_invert_cond(TCGCond c)
 301 {
 302     return (TCGCond)(c ^ 1);
 303 }
 304
 305 /* Swap the operands in a comparison.  */
 306 static inline TCGCond tcg_swap_cond(TCGCond c)
 307 {
 308     return c & 6 ? (TCGCond)(c ^ 9) : c;
 309 }
 310
 311 /* Create an "unsigned" version of a "signed" comparison.  */
 312 static inline TCGCond tcg_unsigned_cond(TCGCond c)
 313 {
 314     return c & 2 ? (TCGCond)(c ^ 6) : c;
 315 }
 316
 317 /* Must a comparison be considered unsigned?  */
 318 static inline bool is_unsigned_cond(TCGCond c)
 319 {
 320     return (c & 4) != 0;
 321 }
 322
 323 /* Create a "high" version of a double-word comparison.
 324    This removes equality from a LTE or GTE comparison.  */
 325 static inline TCGCond tcg_high_cond(TCGCond c)
 326 {
 327     switch (c) {
 328     case TCG_COND_GE:
 329     case TCG_COND_LE:
 330     case TCG_COND_GEU:
 331     case TCG_COND_LEU:
 332         return (TCGCond)(c ^ 8);
 333     default:
 334         return c;
 335     }
 336 }
 337
 338 #define TEMP_VAL_DEAD  0
 339 #define TEMP_VAL_REG   1
 340 #define TEMP_VAL_MEM   2
 341 #define TEMP_VAL_CONST 3
 342
 343 /* XXX: optimize memory layout */
 344 typedef struct TCGTemp {
 345     TCGType base_type;
 346     TCGType type;
 347     int val_type;
 348     int reg;
 349     tcg_target_long val;
 350     int mem_reg;
 351     tcg_target_long mem_offset;
 352     unsigned int fixed_reg:1;
 353     unsigned int mem_coherent:1;
 354     unsigned int mem_allocated:1;
 355     unsigned int temp_local:1; /* If true, the temp is saved across
 356                                   basic blocks. Otherwise, it is not
 357                                   preserved across basic blocks. */
 358     unsigned int temp_allocated:1; /* never used for code gen */
 359     /* index of next free temp of same base type, -1 if end */
 360     int next_free_temp;
 361     const char *name;
 362 } TCGTemp;
 363
 364 typedef struct TCGHelperInfo {
 365     tcg_target_ulong func;
 366     const char *name;
 367 } TCGHelperInfo;
 368
 369 typedef struct TCGContext TCGContext;
 370
 371 struct TCGContext {
 372     uint8_t *pool_cur, *pool_end;
 373     TCGPool *pool_first, *pool_current, *pool_first_large;
 374     TCGLabel *labels;
 375     int nb_labels;
 376     int nb_globals;
 377     int nb_temps;
 378     /* index of free temps, -1 if none */
 379     int first_free_temp[TCG_TYPE_COUNT * 2];
 380
 381     /* goto_tb support */
 382     uint8_t *code_buf;
 383     uintptr_t *tb_next;
 384     uint16_t *tb_next_offset;
 385     uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
 386
 387     /* liveness analysis */
 388     uint16_t *op_dead_args; /* for each operation, each bit tells if the
 389                                corresponding argument is dead */
 390     uint8_t *op_sync_args;  /* for each operation, each bit tells if the
 391                                corresponding output argument needs to be
 392                                sync to memory. */
 393
 394     /* tells in which temporary a given register is. It does not take
 395        into account fixed registers */
 396     int reg_to_temp[TCG_TARGET_NB_REGS];
 397     TCGRegSet reserved_regs;
 398     tcg_target_long current_frame_offset;
 399     tcg_target_long frame_start;
 400     tcg_target_long frame_end;
 401     int frame_reg;
 402
 403     uint8_t *code_ptr;
 404     TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
 405
 406     TCGHelperInfo *helpers;
 407     int nb_helpers;
 408     int allocated_helpers;
 409     int helpers_sorted;
 410
 411 #ifdef CONFIG_PROFILER
 412     /* profiling info */
 413     int64_t tb_count1;
 414     int64_t tb_count;
 415     int64_t op_count; /* total insn count */
 416     int op_count_max; /* max insn per TB */
 417     int64_t temp_count;
 418     int temp_count_max;
 419     int64_t del_op_count;
 420     int64_t code_in_len;
 421     int64_t code_out_len;
 422     int64_t interm_time;
 423     int64_t code_time;
 424     int64_t la_time;
 425     int64_t opt_time;
 426     int64_t restore_count;
 427     int64_t restore_time;
 428 #endif
 429
 430 #ifdef CONFIG_DEBUG_TCG
 431     int temps_in_use;
 432     int goto_tb_issue_mask;
 433 #endif
 434 };
 435
 436 extern TCGContext tcg_ctx;
 437 extern uint16_t *gen_opc_ptr;
 438 extern TCGArg *gen_opparam_ptr;
 439 extern uint16_t gen_opc_buf[];
 440 extern TCGArg gen_opparam_buf[];
 441
 442 /* pool based memory allocation */
 443
 444 void *tcg_malloc_internal(TCGContext *s, int size);
 445 void tcg_pool_reset(TCGContext *s);
 446 void tcg_pool_delete(TCGContext *s);
 447
 448 static inline void *tcg_malloc(int size)
 449 {
 450     TCGContext *s = &tcg_ctx;
 451     uint8_t *ptr, *ptr_end;
 452     size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
 453     ptr = s->pool_cur;
 454     ptr_end = ptr + size;
 455     if (unlikely(ptr_end > s->pool_end)) {
 456         return tcg_malloc_internal(&tcg_ctx, size);
 457     } else {
 458         s->pool_cur = ptr_end;
 459         return ptr;
 460     }
 461 }
 462
 463 void tcg_context_init(TCGContext *s);
 464 void tcg_prologue_init(TCGContext *s);
 465 void tcg_func_start(TCGContext *s);
 466
 467 int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf);
 468 int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);
 469
 470 void tcg_set_frame(TCGContext *s, int reg,
 471                    tcg_target_long start, tcg_target_long size);
 472
 473 TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
 474 TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
 475                                 const char *name);
 476 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
 477 static inline TCGv_i32 tcg_temp_new_i32(void)
 478 {
 479     return tcg_temp_new_internal_i32(0);
 480 }
 481 static inline TCGv_i32 tcg_temp_local_new_i32(void)
 482 {
 483     return tcg_temp_new_internal_i32(1);
 484 }
 485 void tcg_temp_free_i32(TCGv_i32 arg);
 486 char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
 487
 488 TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
 489 TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
 490                                 const char *name);
 491 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
 492 static inline TCGv_i64 tcg_temp_new_i64(void)
 493 {
 494     return tcg_temp_new_internal_i64(0);
 495 }
 496 static inline TCGv_i64 tcg_temp_local_new_i64(void)
 497 {
 498     return tcg_temp_new_internal_i64(1);
 499 }
 500 void tcg_temp_free_i64(TCGv_i64 arg);
 501 char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
 502
 503 #if defined(CONFIG_DEBUG_TCG)
 504 /* If you call tcg_clear_temp_count() at the start of a section of
 505  * code which is not supposed to leak any TCG temporaries, then
 506  * calling tcg_check_temp_count() at the end of the section will
 507  * return 1 if the section did in fact leak a temporary.
 508  */
 509 void tcg_clear_temp_count(void);
 510 int tcg_check_temp_count(void);
 511 #else
 512 #define tcg_clear_temp_count() do { } while (0)
 513 #define tcg_check_temp_count() 0
 514 #endif
 515
 516 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
 517
 518 #define TCG_CT_ALIAS  0x80
 519 #define TCG_CT_IALIAS 0x40
 520 #define TCG_CT_REG    0x01
 521 #define TCG_CT_CONST  0x02 /* any constant of register size */
 522
 523 typedef struct TCGArgConstraint {
 524     uint16_t ct;
 525     uint8_t alias_index;
 526     union {
 527         TCGRegSet regs;
 528     } u;
 529 } TCGArgConstraint;
 530
 531 #define TCG_MAX_OP_ARGS 16
 532
 533 /* Bits for TCGOpDef->flags, 8 bits available.  */
 534 enum {
 535     /* Instruction defines the end of a basic block.  */
 536     TCG_OPF_BB_END       = 0x01,
 537     /* Instruction clobbers call registers and potentially update globals.  */
 538     TCG_OPF_CALL_CLOBBER = 0x02,
 539     /* Instruction has side effects: it cannot be removed if its outputs
 540        are not used, and might trigger exceptions.  */
 541     TCG_OPF_SIDE_EFFECTS = 0x04,
 542     /* Instruction operands are 64-bits (otherwise 32-bits).  */
 543     TCG_OPF_64BIT        = 0x08,
 544     /* Instruction is optional and not implemented by the host.  */
 545     TCG_OPF_NOT_PRESENT  = 0x10,
 546 };
 547
 548 typedef struct TCGOpDef {
 549     const char *name;
 550     uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
 551     uint8_t flags;
 552     TCGArgConstraint *args_ct;
 553     int *sorted_args;
 554 #if defined(CONFIG_DEBUG_TCG)
 555     int used;
 556 #endif
 557 } TCGOpDef;
 558
 559 extern TCGOpDef tcg_op_defs[];
 560 extern const size_t tcg_op_defs_max;
 561
 562 typedef struct TCGTargetOpDef {
 563     TCGOpcode op;
 564     const char *args_ct_str[TCG_MAX_OP_ARGS];
 565 } TCGTargetOpDef;
 566
 567 #define tcg_abort() \
 568 do {\
 569     fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
 570     abort();\
 571 } while (0)
 572
 573 #ifdef CONFIG_DEBUG_TCG
 574 # define tcg_debug_assert(X) do { assert(X); } while (0)
 575 #elif QEMU_GNUC_PREREQ(4, 5)
 576 # define tcg_debug_assert(X) \
 577     do { if (!(X)) { __builtin_unreachable(); } } while (0)
 578 #else
 579 # define tcg_debug_assert(X) do { (void)(X); } while (0)
 580 #endif
 581
 582 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
 583
 584 #if TCG_TARGET_REG_BITS == 32
 585 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
 586 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
 587
 588 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((tcg_target_long)(V)))
 589 #define tcg_global_reg_new_ptr(R, N) \
 590     TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
 591 #define tcg_global_mem_new_ptr(R, O, N) \
 592     TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
 593 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
 594 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
 595 #else
 596 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
 597 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
 598
 599 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((tcg_target_long)(V)))
 600 #define tcg_global_reg_new_ptr(R, N) \
 601     TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
 602 #define tcg_global_mem_new_ptr(R, O, N) \
 603     TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
 604 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
 605 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
 606 #endif
 607
 608 void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
 609                    int sizemask, TCGArg ret, int nargs, TCGArg *args);
 610
 611 void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
 612                         int c, int right, int arith);
 613
 614 TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr, TCGArg *args,
 615                      TCGOpDef *tcg_op_def);
 616
 617 /* only used for debugging purposes */
 618 void tcg_register_helper(void *func, const char *name);
 619 const char *tcg_helper_get_name(TCGContext *s, void *func);
 620 void tcg_dump_ops(TCGContext *s);
 621
 622 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
 623 TCGv_i32 tcg_const_i32(int32_t val);
 624 TCGv_i64 tcg_const_i64(int64_t val);
 625 TCGv_i32 tcg_const_local_i32(int32_t val);
 626 TCGv_i64 tcg_const_local_i64(int64_t val);
 627
 628 extern uint8_t *code_gen_prologue;
 629
 630 /* TCG targets may use a different definition of tcg_qemu_tb_exec. */
 631 #if !defined(tcg_qemu_tb_exec)
 632 # define tcg_qemu_tb_exec(env, tb_ptr) \
 633     ((tcg_target_ulong (*)(void *, void *))code_gen_prologue)(env, tb_ptr)
 634 #endif
 635
 636 void tcg_register_jit(void *buf, size_t buf_size);