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 #define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
 274 #define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
 275
 276 /* call flags */
 277 /* Helper does not read globals (either directly or through an exception). It
 278    implies TCG_CALL_NO_WRITE_GLOBALS. */
 279 #define TCG_CALL_NO_READ_GLOBALS    0x0010
 280 /* Helper does not write globals */
 281 #define TCG_CALL_NO_WRITE_GLOBALS   0x0020
 282 /* Helper can be safely suppressed if the return value is not used. */
 283 #define TCG_CALL_NO_SIDE_EFFECTS    0x0040
 284
 285 /* convenience version of most used call flags */
 286 #define TCG_CALL_NO_RWG         TCG_CALL_NO_READ_GLOBALS
 287 #define TCG_CALL_NO_WG          TCG_CALL_NO_WRITE_GLOBALS
 288 #define TCG_CALL_NO_SE          TCG_CALL_NO_SIDE_EFFECTS
 289 #define TCG_CALL_NO_RWG_SE      (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
 290 #define TCG_CALL_NO_WG_SE       (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
 291
 292 /* used to align parameters */
 293 #define TCG_CALL_DUMMY_TCGV     MAKE_TCGV_I32(-1)
 294 #define TCG_CALL_DUMMY_ARG      ((TCGArg)(-1))
 295
 296 /* Conditions.  Note that these are laid out for easy manipulation by
 297    the functions below:
 298      bit 0 is used for inverting;
 299      bit 1 is signed,
 300      bit 2 is unsigned,
 301      bit 3 is used with bit 0 for swapping signed/unsigned.  */
 302 typedef enum {
 303     /* non-signed */
 304     TCG_COND_NEVER  = 0 | 0 | 0 | 0,
 305     TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
 306     TCG_COND_EQ     = 8 | 0 | 0 | 0,
 307     TCG_COND_NE     = 8 | 0 | 0 | 1,
 308     /* signed */
 309     TCG_COND_LT     = 0 | 0 | 2 | 0,
 310     TCG_COND_GE     = 0 | 0 | 2 | 1,
 311     TCG_COND_LE     = 8 | 0 | 2 | 0,
 312     TCG_COND_GT     = 8 | 0 | 2 | 1,
 313     /* unsigned */
 314     TCG_COND_LTU    = 0 | 4 | 0 | 0,
 315     TCG_COND_GEU    = 0 | 4 | 0 | 1,
 316     TCG_COND_LEU    = 8 | 4 | 0 | 0,
 317     TCG_COND_GTU    = 8 | 4 | 0 | 1,
 318 } TCGCond;
 319
 320 /* Invert the sense of the comparison.  */
 321 static inline TCGCond tcg_invert_cond(TCGCond c)
 322 {
 323     return (TCGCond)(c ^ 1);
 324 }
 325
 326 /* Swap the operands in a comparison.  */
 327 static inline TCGCond tcg_swap_cond(TCGCond c)
 328 {
 329     return c & 6 ? (TCGCond)(c ^ 9) : c;
 330 }
 331
 332 /* Create an "unsigned" version of a "signed" comparison.  */
 333 static inline TCGCond tcg_unsigned_cond(TCGCond c)
 334 {
 335     return c & 2 ? (TCGCond)(c ^ 6) : c;
 336 }
 337
 338 /* Must a comparison be considered unsigned?  */
 339 static inline bool is_unsigned_cond(TCGCond c)
 340 {
 341     return (c & 4) != 0;
 342 }
 343
 344 /* Create a "high" version of a double-word comparison.
 345    This removes equality from a LTE or GTE comparison.  */
 346 static inline TCGCond tcg_high_cond(TCGCond c)
 347 {
 348     switch (c) {
 349     case TCG_COND_GE:
 350     case TCG_COND_LE:
 351     case TCG_COND_GEU:
 352     case TCG_COND_LEU:
 353         return (TCGCond)(c ^ 8);
 354     default:
 355         return c;
 356     }
 357 }
 358
 359 #define TEMP_VAL_DEAD  0
 360 #define TEMP_VAL_REG   1
 361 #define TEMP_VAL_MEM   2
 362 #define TEMP_VAL_CONST 3
 363
 364 /* XXX: optimize memory layout */
 365 typedef struct TCGTemp {
 366     TCGType base_type;
 367     TCGType type;
 368     int val_type;
 369     int reg;
 370     tcg_target_long val;
 371     int mem_reg;
 372     tcg_target_long mem_offset;
 373     unsigned int fixed_reg:1;
 374     unsigned int mem_coherent:1;
 375     unsigned int mem_allocated:1;
 376     unsigned int temp_local:1; /* If true, the temp is saved across
 377                                   basic blocks. Otherwise, it is not
 378                                   preserved across basic blocks. */
 379     unsigned int temp_allocated:1; /* never used for code gen */
 380     /* index of next free temp of same base type, -1 if end */
 381     int next_free_temp;
 382     const char *name;
 383 } TCGTemp;
 384
 385 typedef struct TCGHelperInfo {
 386     tcg_target_ulong func;
 387     const char *name;
 388 } TCGHelperInfo;
 389
 390 typedef struct TCGContext TCGContext;
 391
 392 struct TCGContext {
 393     uint8_t *pool_cur, *pool_end;
 394     TCGPool *pool_first, *pool_current, *pool_first_large;
 395     TCGLabel *labels;
 396     int nb_labels;
 397     int nb_globals;
 398     int nb_temps;
 399     /* index of free temps, -1 if none */
 400     int first_free_temp[TCG_TYPE_COUNT * 2];
 401
 402     /* goto_tb support */
 403     uint8_t *code_buf;
 404     uintptr_t *tb_next;
 405     uint16_t *tb_next_offset;
 406     uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
 407
 408     /* liveness analysis */
 409     uint16_t *op_dead_args; /* for each operation, each bit tells if the
 410                                corresponding argument is dead */
 411     uint8_t *op_sync_args;  /* for each operation, each bit tells if the
 412                                corresponding output argument needs to be
 413                                sync to memory. */
 414
 415     /* tells in which temporary a given register is. It does not take
 416        into account fixed registers */
 417     int reg_to_temp[TCG_TARGET_NB_REGS];
 418     TCGRegSet reserved_regs;
 419     tcg_target_long current_frame_offset;
 420     tcg_target_long frame_start;
 421     tcg_target_long frame_end;
 422     int frame_reg;
 423
 424     uint8_t *code_ptr;
 425     TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
 426
 427     TCGHelperInfo *helpers;
 428     int nb_helpers;
 429     int allocated_helpers;
 430     int helpers_sorted;
 431
 432 #ifdef CONFIG_PROFILER
 433     /* profiling info */
 434     int64_t tb_count1;
 435     int64_t tb_count;
 436     int64_t op_count; /* total insn count */
 437     int op_count_max; /* max insn per TB */
 438     int64_t temp_count;
 439     int temp_count_max;
 440     int64_t del_op_count;
 441     int64_t code_in_len;
 442     int64_t code_out_len;
 443     int64_t interm_time;
 444     int64_t code_time;
 445     int64_t la_time;
 446     int64_t opt_time;
 447     int64_t restore_count;
 448     int64_t restore_time;
 449 #endif
 450
 451 #ifdef CONFIG_DEBUG_TCG
 452     int temps_in_use;
 453     int goto_tb_issue_mask;
 454 #endif
 455
 456     uint16_t gen_opc_buf[OPC_BUF_SIZE];
 457     TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
 458
 459     uint16_t *gen_opc_ptr;
 460     TCGArg *gen_opparam_ptr;
 461     target_ulong gen_opc_pc[OPC_BUF_SIZE];
 462     uint16_t gen_opc_icount[OPC_BUF_SIZE];
 463     uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
 464
 465 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
 466     /* labels info for qemu_ld/st IRs
 467        The labels help to generate TLB miss case codes at the end of TB */
 468     TCGLabelQemuLdst *qemu_ldst_labels;
 469     int nb_qemu_ldst_labels;
 470 #endif
 471 };
 472
 473 extern TCGContext tcg_ctx;
 474
 475 /* pool based memory allocation */
 476
 477 void *tcg_malloc_internal(TCGContext *s, int size);
 478 void tcg_pool_reset(TCGContext *s);
 479 void tcg_pool_delete(TCGContext *s);
 480
 481 static inline void *tcg_malloc(int size)
 482 {
 483     TCGContext *s = &tcg_ctx;
 484     uint8_t *ptr, *ptr_end;
 485     size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
 486     ptr = s->pool_cur;
 487     ptr_end = ptr + size;
 488     if (unlikely(ptr_end > s->pool_end)) {
 489         return tcg_malloc_internal(&tcg_ctx, size);
 490     } else {
 491         s->pool_cur = ptr_end;
 492         return ptr;
 493     }
 494 }
 495
 496 void tcg_context_init(TCGContext *s);
 497 void tcg_prologue_init(TCGContext *s);
 498 void tcg_func_start(TCGContext *s);
 499
 500 int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf);
 501 int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);
 502
 503 void tcg_set_frame(TCGContext *s, int reg,
 504                    tcg_target_long start, tcg_target_long size);
 505
 506 TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
 507 TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
 508                                 const char *name);
 509 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
 510 static inline TCGv_i32 tcg_temp_new_i32(void)
 511 {
 512     return tcg_temp_new_internal_i32(0);
 513 }
 514 static inline TCGv_i32 tcg_temp_local_new_i32(void)
 515 {
 516     return tcg_temp_new_internal_i32(1);
 517 }
 518 void tcg_temp_free_i32(TCGv_i32 arg);
 519 char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
 520
 521 TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
 522 TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
 523                                 const char *name);
 524 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
 525 static inline TCGv_i64 tcg_temp_new_i64(void)
 526 {
 527     return tcg_temp_new_internal_i64(0);
 528 }
 529 static inline TCGv_i64 tcg_temp_local_new_i64(void)
 530 {
 531     return tcg_temp_new_internal_i64(1);
 532 }
 533 void tcg_temp_free_i64(TCGv_i64 arg);
 534 char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
 535
 536 #if defined(CONFIG_DEBUG_TCG)
 537 /* If you call tcg_clear_temp_count() at the start of a section of
 538  * code which is not supposed to leak any TCG temporaries, then
 539  * calling tcg_check_temp_count() at the end of the section will
 540  * return 1 if the section did in fact leak a temporary.
 541  */
 542 void tcg_clear_temp_count(void);
 543 int tcg_check_temp_count(void);
 544 #else
 545 #define tcg_clear_temp_count() do { } while (0)
 546 #define tcg_check_temp_count() 0
 547 #endif
 548
 549 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
 550
 551 #define TCG_CT_ALIAS  0x80
 552 #define TCG_CT_IALIAS 0x40
 553 #define TCG_CT_REG    0x01
 554 #define TCG_CT_CONST  0x02 /* any constant of register size */
 555
 556 typedef struct TCGArgConstraint {
 557     uint16_t ct;
 558     uint8_t alias_index;
 559     union {
 560         TCGRegSet regs;
 561     } u;
 562 } TCGArgConstraint;
 563
 564 #define TCG_MAX_OP_ARGS 16
 565
 566 /* Bits for TCGOpDef->flags, 8 bits available.  */
 567 enum {
 568     /* Instruction defines the end of a basic block.  */
 569     TCG_OPF_BB_END       = 0x01,
 570     /* Instruction clobbers call registers and potentially update globals.  */
 571     TCG_OPF_CALL_CLOBBER = 0x02,
 572     /* Instruction has side effects: it cannot be removed if its outputs
 573        are not used, and might trigger exceptions.  */
 574     TCG_OPF_SIDE_EFFECTS = 0x04,
 575     /* Instruction operands are 64-bits (otherwise 32-bits).  */
 576     TCG_OPF_64BIT        = 0x08,
 577     /* Instruction is optional and not implemented by the host.  */
 578     TCG_OPF_NOT_PRESENT  = 0x10,
 579 };
 580
 581 typedef struct TCGOpDef {
 582     const char *name;
 583     uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
 584     uint8_t flags;
 585     TCGArgConstraint *args_ct;
 586     int *sorted_args;
 587 #if defined(CONFIG_DEBUG_TCG)
 588     int used;
 589 #endif
 590 } TCGOpDef;
 591
 592 extern TCGOpDef tcg_op_defs[];
 593 extern const size_t tcg_op_defs_max;
 594
 595 typedef struct TCGTargetOpDef {
 596     TCGOpcode op;
 597     const char *args_ct_str[TCG_MAX_OP_ARGS];
 598 } TCGTargetOpDef;
 599
 600 #define tcg_abort() \
 601 do {\
 602     fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
 603     abort();\
 604 } while (0)
 605
 606 #ifdef CONFIG_DEBUG_TCG
 607 # define tcg_debug_assert(X) do { assert(X); } while (0)
 608 #elif QEMU_GNUC_PREREQ(4, 5)
 609 # define tcg_debug_assert(X) \
 610     do { if (!(X)) { __builtin_unreachable(); } } while (0)
 611 #else
 612 # define tcg_debug_assert(X) do { (void)(X); } while (0)
 613 #endif
 614
 615 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
 616
 617 #if TCG_TARGET_REG_BITS == 32
 618 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
 619 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
 620
 621 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((tcg_target_long)(V)))
 622 #define tcg_global_reg_new_ptr(R, N) \
 623     TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
 624 #define tcg_global_mem_new_ptr(R, O, N) \
 625     TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
 626 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
 627 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
 628 #else
 629 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
 630 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
 631
 632 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((tcg_target_long)(V)))
 633 #define tcg_global_reg_new_ptr(R, N) \
 634     TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
 635 #define tcg_global_mem_new_ptr(R, O, N) \
 636     TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
 637 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
 638 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
 639 #endif
 640
 641 void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
 642                    int sizemask, TCGArg ret, int nargs, TCGArg *args);
 643
 644 void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
 645                         int c, int right, int arith);
 646
 647 TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr, TCGArg *args,
 648                      TCGOpDef *tcg_op_def);
 649
 650 /* only used for debugging purposes */
 651 void tcg_register_helper(void *func, const char *name);
 652 const char *tcg_helper_get_name(TCGContext *s, void *func);
 653 void tcg_dump_ops(TCGContext *s);
 654
 655 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
 656 TCGv_i32 tcg_const_i32(int32_t val);
 657 TCGv_i64 tcg_const_i64(int64_t val);
 658 TCGv_i32 tcg_const_local_i32(int32_t val);
 659 TCGv_i64 tcg_const_local_i64(int64_t val);
 660
 661 extern uint8_t *code_gen_prologue;
 662
 663 /* TCG targets may use a different definition of tcg_qemu_tb_exec. */
 664 #if !defined(tcg_qemu_tb_exec)
 665 # define tcg_qemu_tb_exec(env, tb_ptr) \
 666     ((tcg_target_ulong (*)(void *, void *))code_gen_prologue)(env, tb_ptr)
 667 #endif
 668
 669 void tcg_register_jit(void *buf, size_t buf_size);
 670
 671 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
 672 /* Generate TB finalization at the end of block */
 673 void tcg_out_tb_finalize(TCGContext *s);
 674 #endif