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 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
 192 /* Macros/structures for qemu_ld/st IR code optimization:
 193    TCG_MAX_HELPER_LABELS is defined as same as OPC_BUF_SIZE in exec-all.h. */
 194 #define TCG_MAX_QEMU_LDST       640
 195
 196 typedef struct TCGLabelQemuLdst {
 197     int is_ld:1;            /* qemu_ld: 1, qemu_st: 0 */
 198     int opc:4;
 199     int addrlo_reg;         /* reg index for low word of guest virtual addr */
 200     int addrhi_reg;         /* reg index for high word of guest virtual addr */
 201     int datalo_reg;         /* reg index for low word to be loaded or stored */
 202     int datahi_reg;         /* reg index for high word to be loaded or stored */
 203     int mem_index;          /* soft MMU memory index */
 204     uint8_t *raddr;         /* gen code addr of the next IR of qemu_ld/st IR */
 205     uint8_t *label_ptr[2];  /* label pointers to be updated */
 206 } TCGLabelQemuLdst;
 207 #endif
 208
 209 #ifdef CONFIG_DEBUG_TCG
 210 #define DEBUG_TCGV 1
 211 #endif
 212
 213 #ifdef DEBUG_TCGV
 214
 215 typedef struct
 216 {
 217     int i32;
 218 } TCGv_i32;
 219
 220 typedef struct
 221 {
 222     int i64;
 223 } TCGv_i64;
 224
 225 typedef struct {
 226     int iptr;
 227 } TCGv_ptr;
 228
 229 #define MAKE_TCGV_I32(i) __extension__                  \
 230     ({ TCGv_i32 make_tcgv_tmp = {i}; make_tcgv_tmp;})
 231 #define MAKE_TCGV_I64(i) __extension__                  \
 232     ({ TCGv_i64 make_tcgv_tmp = {i}; make_tcgv_tmp;})
 233 #define MAKE_TCGV_PTR(i) __extension__                  \
 234     ({ TCGv_ptr make_tcgv_tmp = {i}; make_tcgv_tmp; })
 235 #define GET_TCGV_I32(t) ((t).i32)
 236 #define GET_TCGV_I64(t) ((t).i64)
 237 #define GET_TCGV_PTR(t) ((t).iptr)
 238 #if TCG_TARGET_REG_BITS == 32
 239 #define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
 240 #define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
 241 #endif
 242
 243 #else /* !DEBUG_TCGV */
 244
 245 typedef int TCGv_i32;
 246 typedef int TCGv_i64;
 247 #if TCG_TARGET_REG_BITS == 32
 248 #define TCGv_ptr TCGv_i32
 249 #else
 250 #define TCGv_ptr TCGv_i64
 251 #endif
 252 #define MAKE_TCGV_I32(x) (x)
 253 #define MAKE_TCGV_I64(x) (x)
 254 #define MAKE_TCGV_PTR(x) (x)
 255 #define GET_TCGV_I32(t) (t)
 256 #define GET_TCGV_I64(t) (t)
 257 #define GET_TCGV_PTR(t) (t)
 258
 259 #if TCG_TARGET_REG_BITS == 32
 260 #define TCGV_LOW(t) (t)
 261 #define TCGV_HIGH(t) ((t) + 1)
 262 #endif
 263
 264 #endif /* DEBUG_TCGV */
 265
 266 #define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
 267 #define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
 268
 269 /* Dummy definition to avoid compiler warnings.  */
 270 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
 271 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
 272
 273 /* call flags */
 274 /* Helper does not read globals (either directly or through an exception). It
 275    implies TCG_CALL_NO_WRITE_GLOBALS. */
 276 #define TCG_CALL_NO_READ_GLOBALS    0x0010
 277 /* Helper does not write globals */
 278 #define TCG_CALL_NO_WRITE_GLOBALS   0x0020
 279 /* Helper can be safely suppressed if the return value is not used. */
 280 #define TCG_CALL_NO_SIDE_EFFECTS    0x0040
 281
 282 /* convenience version of most used call flags */
 283 #define TCG_CALL_NO_RWG         TCG_CALL_NO_READ_GLOBALS
 284 #define TCG_CALL_NO_WG          TCG_CALL_NO_WRITE_GLOBALS
 285 #define TCG_CALL_NO_SE          TCG_CALL_NO_SIDE_EFFECTS
 286 #define TCG_CALL_NO_RWG_SE      (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
 287 #define TCG_CALL_NO_WG_SE       (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
 288
 289 /* used to align parameters */
 290 #define TCG_CALL_DUMMY_TCGV     MAKE_TCGV_I32(-1)
 291 #define TCG_CALL_DUMMY_ARG      ((TCGArg)(-1))
 292
 293 /* Conditions.  Note that these are laid out for easy manipulation by
 294    the functions below:
 295      bit 0 is used for inverting;
 296      bit 1 is signed,
 297      bit 2 is unsigned,
 298      bit 3 is used with bit 0 for swapping signed/unsigned.  */
 299 typedef enum {
 300     /* non-signed */
 301     TCG_COND_NEVER  = 0 | 0 | 0 | 0,
 302     TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
 303     TCG_COND_EQ     = 8 | 0 | 0 | 0,
 304     TCG_COND_NE     = 8 | 0 | 0 | 1,
 305     /* signed */
 306     TCG_COND_LT     = 0 | 0 | 2 | 0,
 307     TCG_COND_GE     = 0 | 0 | 2 | 1,
 308     TCG_COND_LE     = 8 | 0 | 2 | 0,
 309     TCG_COND_GT     = 8 | 0 | 2 | 1,
 310     /* unsigned */
 311     TCG_COND_LTU    = 0 | 4 | 0 | 0,
 312     TCG_COND_GEU    = 0 | 4 | 0 | 1,
 313     TCG_COND_LEU    = 8 | 4 | 0 | 0,
 314     TCG_COND_GTU    = 8 | 4 | 0 | 1,
 315 } TCGCond;
 316
 317 /* Invert the sense of the comparison.  */
 318 static inline TCGCond tcg_invert_cond(TCGCond c)
 319 {
 320     return (TCGCond)(c ^ 1);
 321 }
 322
 323 /* Swap the operands in a comparison.  */
 324 static inline TCGCond tcg_swap_cond(TCGCond c)
 325 {
 326     return c & 6 ? (TCGCond)(c ^ 9) : c;
 327 }
 328
 329 /* Create an "unsigned" version of a "signed" comparison.  */
 330 static inline TCGCond tcg_unsigned_cond(TCGCond c)
 331 {
 332     return c & 2 ? (TCGCond)(c ^ 6) : c;
 333 }
 334
 335 /* Must a comparison be considered unsigned?  */
 336 static inline bool is_unsigned_cond(TCGCond c)
 337 {
 338     return (c & 4) != 0;
 339 }
 340
 341 /* Create a "high" version of a double-word comparison.
 342    This removes equality from a LTE or GTE comparison.  */
 343 static inline TCGCond tcg_high_cond(TCGCond c)
 344 {
 345     switch (c) {
 346     case TCG_COND_GE:
 347     case TCG_COND_LE:
 348     case TCG_COND_GEU:
 349     case TCG_COND_LEU:
 350         return (TCGCond)(c ^ 8);
 351     default:
 352         return c;
 353     }
 354 }
 355
 356 #define TEMP_VAL_DEAD  0
 357 #define TEMP_VAL_REG   1
 358 #define TEMP_VAL_MEM   2
 359 #define TEMP_VAL_CONST 3
 360
 361 /* XXX: optimize memory layout */
 362 typedef struct TCGTemp {
 363     TCGType base_type;
 364     TCGType type;
 365     int val_type;
 366     int reg;
 367     tcg_target_long val;
 368     int mem_reg;
 369     tcg_target_long mem_offset;
 370     unsigned int fixed_reg:1;
 371     unsigned int mem_coherent:1;
 372     unsigned int mem_allocated:1;
 373     unsigned int temp_local:1; /* If true, the temp is saved across
 374                                   basic blocks. Otherwise, it is not
 375                                   preserved across basic blocks. */
 376     unsigned int temp_allocated:1; /* never used for code gen */
 377     /* index of next free temp of same base type, -1 if end */
 378     int next_free_temp;
 379     const char *name;
 380 } TCGTemp;
 381
 382 typedef struct TCGHelperInfo {
 383     tcg_target_ulong func;
 384     const char *name;
 385 } TCGHelperInfo;
 386
 387 typedef struct TCGContext TCGContext;
 388
 389 struct TCGContext {
 390     uint8_t *pool_cur, *pool_end;
 391     TCGPool *pool_first, *pool_current, *pool_first_large;
 392     TCGLabel *labels;
 393     int nb_labels;
 394     int nb_globals;
 395     int nb_temps;
 396     /* index of free temps, -1 if none */
 397     int first_free_temp[TCG_TYPE_COUNT * 2];
 398
 399     /* goto_tb support */
 400     uint8_t *code_buf;
 401     uintptr_t *tb_next;
 402     uint16_t *tb_next_offset;
 403     uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
 404
 405     /* liveness analysis */
 406     uint16_t *op_dead_args; /* for each operation, each bit tells if the
 407                                corresponding argument is dead */
 408     uint8_t *op_sync_args;  /* for each operation, each bit tells if the
 409                                corresponding output argument needs to be
 410                                sync to memory. */
 411
 412     /* tells in which temporary a given register is. It does not take
 413        into account fixed registers */
 414     int reg_to_temp[TCG_TARGET_NB_REGS];
 415     TCGRegSet reserved_regs;
 416     tcg_target_long current_frame_offset;
 417     tcg_target_long frame_start;
 418     tcg_target_long frame_end;
 419     int frame_reg;
 420
 421     uint8_t *code_ptr;
 422     TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
 423
 424     TCGHelperInfo *helpers;
 425     int nb_helpers;
 426     int allocated_helpers;
 427     int helpers_sorted;
 428
 429 #ifdef CONFIG_PROFILER
 430     /* profiling info */
 431     int64_t tb_count1;
 432     int64_t tb_count;
 433     int64_t op_count; /* total insn count */
 434     int op_count_max; /* max insn per TB */
 435     int64_t temp_count;
 436     int temp_count_max;
 437     int64_t del_op_count;
 438     int64_t code_in_len;
 439     int64_t code_out_len;
 440     int64_t interm_time;
 441     int64_t code_time;
 442     int64_t la_time;
 443     int64_t opt_time;
 444     int64_t restore_count;
 445     int64_t restore_time;
 446 #endif
 447
 448 #ifdef CONFIG_DEBUG_TCG
 449     int temps_in_use;
 450     int goto_tb_issue_mask;
 451 #endif
 452
 453     uint16_t gen_opc_buf[OPC_BUF_SIZE];
 454     TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
 455
 456     uint16_t *gen_opc_ptr;
 457     TCGArg *gen_opparam_ptr;
 458     target_ulong gen_opc_pc[OPC_BUF_SIZE];
 459     uint16_t gen_opc_icount[OPC_BUF_SIZE];
 460     uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
 461
 462 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
 463     /* labels info for qemu_ld/st IRs
 464        The labels help to generate TLB miss case codes at the end of TB */
 465     TCGLabelQemuLdst *qemu_ldst_labels;
 466     int nb_qemu_ldst_labels;
 467 #endif
 468 };
 469
 470 extern TCGContext tcg_ctx;
 471
 472 /* pool based memory allocation */
 473
 474 void *tcg_malloc_internal(TCGContext *s, int size);
 475 void tcg_pool_reset(TCGContext *s);
 476 void tcg_pool_delete(TCGContext *s);
 477
 478 static inline void *tcg_malloc(int size)
 479 {
 480     TCGContext *s = &tcg_ctx;
 481     uint8_t *ptr, *ptr_end;
 482     size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
 483     ptr = s->pool_cur;
 484     ptr_end = ptr + size;
 485     if (unlikely(ptr_end > s->pool_end)) {
 486         return tcg_malloc_internal(&tcg_ctx, size);
 487     } else {
 488         s->pool_cur = ptr_end;
 489         return ptr;
 490     }
 491 }
 492
 493 void tcg_context_init(TCGContext *s);
 494 void tcg_prologue_init(TCGContext *s);
 495 void tcg_func_start(TCGContext *s);
 496
 497 int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf);
 498 int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);
 499
 500 void tcg_set_frame(TCGContext *s, int reg,
 501                    tcg_target_long start, tcg_target_long size);
 502
 503 TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
 504 TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
 505                                 const char *name);
 506 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
 507 static inline TCGv_i32 tcg_temp_new_i32(void)
 508 {
 509     return tcg_temp_new_internal_i32(0);
 510 }
 511 static inline TCGv_i32 tcg_temp_local_new_i32(void)
 512 {
 513     return tcg_temp_new_internal_i32(1);
 514 }
 515 void tcg_temp_free_i32(TCGv_i32 arg);
 516 char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
 517
 518 TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
 519 TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
 520                                 const char *name);
 521 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
 522 static inline TCGv_i64 tcg_temp_new_i64(void)
 523 {
 524     return tcg_temp_new_internal_i64(0);
 525 }
 526 static inline TCGv_i64 tcg_temp_local_new_i64(void)
 527 {
 528     return tcg_temp_new_internal_i64(1);
 529 }
 530 void tcg_temp_free_i64(TCGv_i64 arg);
 531 char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
 532
 533 #if defined(CONFIG_DEBUG_TCG)
 534 /* If you call tcg_clear_temp_count() at the start of a section of
 535  * code which is not supposed to leak any TCG temporaries, then
 536  * calling tcg_check_temp_count() at the end of the section will
 537  * return 1 if the section did in fact leak a temporary.
 538  */
 539 void tcg_clear_temp_count(void);
 540 int tcg_check_temp_count(void);
 541 #else
 542 #define tcg_clear_temp_count() do { } while (0)
 543 #define tcg_check_temp_count() 0
 544 #endif
 545
 546 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
 547
 548 #define TCG_CT_ALIAS  0x80
 549 #define TCG_CT_IALIAS 0x40
 550 #define TCG_CT_REG    0x01
 551 #define TCG_CT_CONST  0x02 /* any constant of register size */
 552
 553 typedef struct TCGArgConstraint {
 554     uint16_t ct;
 555     uint8_t alias_index;
 556     union {
 557         TCGRegSet regs;
 558     } u;
 559 } TCGArgConstraint;
 560
 561 #define TCG_MAX_OP_ARGS 16
 562
 563 /* Bits for TCGOpDef->flags, 8 bits available.  */
 564 enum {
 565     /* Instruction defines the end of a basic block.  */
 566     TCG_OPF_BB_END       = 0x01,
 567     /* Instruction clobbers call registers and potentially update globals.  */
 568     TCG_OPF_CALL_CLOBBER = 0x02,
 569     /* Instruction has side effects: it cannot be removed if its outputs
 570        are not used, and might trigger exceptions.  */
 571     TCG_OPF_SIDE_EFFECTS = 0x04,
 572     /* Instruction operands are 64-bits (otherwise 32-bits).  */
 573     TCG_OPF_64BIT        = 0x08,
 574     /* Instruction is optional and not implemented by the host.  */
 575     TCG_OPF_NOT_PRESENT  = 0x10,
 576 };
 577
 578 typedef struct TCGOpDef {
 579     const char *name;
 580     uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
 581     uint8_t flags;
 582     TCGArgConstraint *args_ct;
 583     int *sorted_args;
 584 #if defined(CONFIG_DEBUG_TCG)
 585     int used;
 586 #endif
 587 } TCGOpDef;
 588
 589 extern TCGOpDef tcg_op_defs[];
 590 extern const size_t tcg_op_defs_max;
 591
 592 typedef struct TCGTargetOpDef {
 593     TCGOpcode op;
 594     const char *args_ct_str[TCG_MAX_OP_ARGS];
 595 } TCGTargetOpDef;
 596
 597 #define tcg_abort() \
 598 do {\
 599     fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
 600     abort();\
 601 } while (0)
 602
 603 #ifdef CONFIG_DEBUG_TCG
 604 # define tcg_debug_assert(X) do { assert(X); } while (0)
 605 #elif QEMU_GNUC_PREREQ(4, 5)
 606 # define tcg_debug_assert(X) \
 607     do { if (!(X)) { __builtin_unreachable(); } } while (0)
 608 #else
 609 # define tcg_debug_assert(X) do { (void)(X); } while (0)
 610 #endif
 611
 612 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
 613
 614 #if TCG_TARGET_REG_BITS == 32
 615 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
 616 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
 617
 618 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((tcg_target_long)(V)))
 619 #define tcg_global_reg_new_ptr(R, N) \
 620     TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
 621 #define tcg_global_mem_new_ptr(R, O, N) \
 622     TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
 623 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
 624 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
 625 #else
 626 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
 627 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
 628
 629 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((tcg_target_long)(V)))
 630 #define tcg_global_reg_new_ptr(R, N) \
 631     TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
 632 #define tcg_global_mem_new_ptr(R, O, N) \
 633     TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
 634 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
 635 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
 636 #endif
 637
 638 void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
 639                    int sizemask, TCGArg ret, int nargs, TCGArg *args);
 640
 641 void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
 642                         int c, int right, int arith);
 643
 644 TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr, TCGArg *args,
 645                      TCGOpDef *tcg_op_def);
 646
 647 /* only used for debugging purposes */
 648 void tcg_register_helper(void *func, const char *name);
 649 const char *tcg_helper_get_name(TCGContext *s, void *func);
 650 void tcg_dump_ops(TCGContext *s);
 651
 652 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
 653 TCGv_i32 tcg_const_i32(int32_t val);
 654 TCGv_i64 tcg_const_i64(int64_t val);
 655 TCGv_i32 tcg_const_local_i32(int32_t val);
 656 TCGv_i64 tcg_const_local_i64(int64_t val);
 657
 658 extern uint8_t *code_gen_prologue;
 659
 660 /* TCG targets may use a different definition of tcg_qemu_tb_exec. */
 661 #if !defined(tcg_qemu_tb_exec)
 662 # define tcg_qemu_tb_exec(env, tb_ptr) \
 663     ((tcg_target_ulong (*)(void *, void *))code_gen_prologue)(env, tb_ptr)
 664 #endif
 665
 666 void tcg_register_jit(void *buf, size_t buf_size);
 667
 668 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
 669 /* Generate TB finalization at the end of block */
 670 void tcg_out_tb_finalize(TCGContext *s);
 671 #endif