2 * Tiny Code Generator for QEMU
4 * Copyright (c) 2008 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
24 #include "qemu-common.h"
26 #include "tcg-target.h"
28 /* Default target word size to pointer size. */
29 #ifndef TCG_TARGET_REG_BITS
30 # if UINTPTR_MAX == UINT32_MAX
31 # define TCG_TARGET_REG_BITS 32
32 # elif UINTPTR_MAX == UINT64_MAX
33 # define TCG_TARGET_REG_BITS 64
35 # error Unknown pointer size for tcg target
39 #if TCG_TARGET_REG_BITS == 32
40 typedef int32_t tcg_target_long;
41 typedef uint32_t tcg_target_ulong;
42 #define TCG_PRIlx PRIx32
43 #define TCG_PRIld PRId32
44 #elif TCG_TARGET_REG_BITS == 64
45 typedef int64_t tcg_target_long;
46 typedef uint64_t tcg_target_ulong;
47 #define TCG_PRIlx PRIx64
48 #define TCG_PRIld PRId64
53 #include "tcg-runtime.h"
55 #if TCG_TARGET_NB_REGS <= 32
56 typedef uint32_t TCGRegSet;
57 #elif TCG_TARGET_NB_REGS <= 64
58 typedef uint64_t TCGRegSet;
63 #if TCG_TARGET_REG_BITS == 32
64 /* Turn some undef macros into false macros. */
65 #define TCG_TARGET_HAS_div_i64 0
66 #define TCG_TARGET_HAS_rem_i64 0
67 #define TCG_TARGET_HAS_div2_i64 0
68 #define TCG_TARGET_HAS_rot_i64 0
69 #define TCG_TARGET_HAS_ext8s_i64 0
70 #define TCG_TARGET_HAS_ext16s_i64 0
71 #define TCG_TARGET_HAS_ext32s_i64 0
72 #define TCG_TARGET_HAS_ext8u_i64 0
73 #define TCG_TARGET_HAS_ext16u_i64 0
74 #define TCG_TARGET_HAS_ext32u_i64 0
75 #define TCG_TARGET_HAS_bswap16_i64 0
76 #define TCG_TARGET_HAS_bswap32_i64 0
77 #define TCG_TARGET_HAS_bswap64_i64 0
78 #define TCG_TARGET_HAS_neg_i64 0
79 #define TCG_TARGET_HAS_not_i64 0
80 #define TCG_TARGET_HAS_andc_i64 0
81 #define TCG_TARGET_HAS_orc_i64 0
82 #define TCG_TARGET_HAS_eqv_i64 0
83 #define TCG_TARGET_HAS_nand_i64 0
84 #define TCG_TARGET_HAS_nor_i64 0
85 #define TCG_TARGET_HAS_deposit_i64 0
86 #define TCG_TARGET_HAS_movcond_i64 0
87 #define TCG_TARGET_HAS_add2_i64 0
88 #define TCG_TARGET_HAS_sub2_i64 0
89 #define TCG_TARGET_HAS_mulu2_i64 0
90 #define TCG_TARGET_HAS_muls2_i64 0
91 #define TCG_TARGET_HAS_muluh_i64 0
92 #define TCG_TARGET_HAS_mulsh_i64 0
93 /* Turn some undef macros into true macros. */
94 #define TCG_TARGET_HAS_add2_i32 1
95 #define TCG_TARGET_HAS_sub2_i32 1
96 #define TCG_TARGET_HAS_mulu2_i32 1
99 #ifndef TCG_TARGET_deposit_i32_valid
100 #define TCG_TARGET_deposit_i32_valid(ofs, len) 1
102 #ifndef TCG_TARGET_deposit_i64_valid
103 #define TCG_TARGET_deposit_i64_valid(ofs, len) 1
106 /* Only one of DIV or DIV2 should be defined. */
107 #if defined(TCG_TARGET_HAS_div_i32)
108 #define TCG_TARGET_HAS_div2_i32 0
109 #elif defined(TCG_TARGET_HAS_div2_i32)
110 #define TCG_TARGET_HAS_div_i32 0
111 #define TCG_TARGET_HAS_rem_i32 0
113 #if defined(TCG_TARGET_HAS_div_i64)
114 #define TCG_TARGET_HAS_div2_i64 0
115 #elif defined(TCG_TARGET_HAS_div2_i64)
116 #define TCG_TARGET_HAS_div_i64 0
117 #define TCG_TARGET_HAS_rem_i64 0
120 typedef enum TCGOpcode {
121 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
127 #define tcg_regset_clear(d) (d) = 0
128 #define tcg_regset_set(d, s) (d) = (s)
129 #define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
130 #define tcg_regset_set_reg(d, r) (d) |= 1L << (r)
131 #define tcg_regset_reset_reg(d, r) (d) &= ~(1L << (r))
132 #define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
133 #define tcg_regset_or(d, a, b) (d) = (a) | (b)
134 #define tcg_regset_and(d, a, b) (d) = (a) & (b)
135 #define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
136 #define tcg_regset_not(d, a) (d) = ~(a)
138 typedef struct TCGRelocation {
139 struct TCGRelocation *next;
142 tcg_target_long addend;
145 typedef struct TCGLabel {
148 tcg_target_ulong value;
149 TCGRelocation *first_reloc;
153 typedef struct TCGPool {
154 struct TCGPool *next;
156 uint8_t data[0] __attribute__ ((aligned));
159 #define TCG_POOL_CHUNK_SIZE 32768
161 #define TCG_MAX_LABELS 512
163 #define TCG_MAX_TEMPS 512
165 /* when the size of the arguments of a called function is smaller than
166 this value, they are statically allocated in the TB stack frame */
167 #define TCG_STATIC_CALL_ARGS_SIZE 128
169 typedef enum TCGType {
172 TCG_TYPE_COUNT, /* number of different types */
174 /* An alias for the size of the host register. */
175 #if TCG_TARGET_REG_BITS == 32
176 TCG_TYPE_REG = TCG_TYPE_I32,
178 TCG_TYPE_REG = TCG_TYPE_I64,
181 /* An alias for the size of the native pointer. */
182 #if UINTPTR_MAX == UINT32_MAX
183 TCG_TYPE_PTR = TCG_TYPE_I32,
185 TCG_TYPE_PTR = TCG_TYPE_I64,
188 /* An alias for the size of the target "long", aka register. */
189 #if TARGET_LONG_BITS == 64
190 TCG_TYPE_TL = TCG_TYPE_I64,
192 TCG_TYPE_TL = TCG_TYPE_I32,
196 typedef tcg_target_ulong TCGArg;
198 /* Define a type and accessor macros for variables. Using a struct is
199 nice because it gives some level of type safely. Ideally the compiler
200 be able to see through all this. However in practice this is not true,
201 especially on targets with braindamaged ABIs (e.g. i386).
202 We use plain int by default to avoid this runtime overhead.
203 Users of tcg_gen_* don't need to know about any of this, and should
204 treat TCGv as an opaque type.
205 In addition we do typechecking for different types of variables. TCGv_i32
206 and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
207 are aliases for target_ulong and host pointer sized values respectively.
210 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
211 /* Macros/structures for qemu_ld/st IR code optimization:
212 TCG_MAX_HELPER_LABELS is defined as same as OPC_BUF_SIZE in exec-all.h. */
213 #define TCG_MAX_QEMU_LDST 640
215 typedef struct TCGLabelQemuLdst {
216 int is_ld:1; /* qemu_ld: 1, qemu_st: 0 */
218 int addrlo_reg; /* reg index for low word of guest virtual addr */
219 int addrhi_reg; /* reg index for high word of guest virtual addr */
220 int datalo_reg; /* reg index for low word to be loaded or stored */
221 int datahi_reg; /* reg index for high word to be loaded or stored */
222 int mem_index; /* soft MMU memory index */
223 uint8_t *raddr; /* gen code addr of the next IR of qemu_ld/st IR */
224 uint8_t *label_ptr[2]; /* label pointers to be updated */
228 #ifdef CONFIG_DEBUG_TCG
248 #define MAKE_TCGV_I32(i) __extension__ \
249 ({ TCGv_i32 make_tcgv_tmp = {i}; make_tcgv_tmp;})
250 #define MAKE_TCGV_I64(i) __extension__ \
251 ({ TCGv_i64 make_tcgv_tmp = {i}; make_tcgv_tmp;})
252 #define MAKE_TCGV_PTR(i) __extension__ \
253 ({ TCGv_ptr make_tcgv_tmp = {i}; make_tcgv_tmp; })
254 #define GET_TCGV_I32(t) ((t).i32)
255 #define GET_TCGV_I64(t) ((t).i64)
256 #define GET_TCGV_PTR(t) ((t).iptr)
257 #if TCG_TARGET_REG_BITS == 32
258 #define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
259 #define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
262 #else /* !DEBUG_TCGV */
264 typedef int TCGv_i32;
265 typedef int TCGv_i64;
266 #if TCG_TARGET_REG_BITS == 32
267 #define TCGv_ptr TCGv_i32
269 #define TCGv_ptr TCGv_i64
271 #define MAKE_TCGV_I32(x) (x)
272 #define MAKE_TCGV_I64(x) (x)
273 #define MAKE_TCGV_PTR(x) (x)
274 #define GET_TCGV_I32(t) (t)
275 #define GET_TCGV_I64(t) (t)
276 #define GET_TCGV_PTR(t) (t)
278 #if TCG_TARGET_REG_BITS == 32
279 #define TCGV_LOW(t) (t)
280 #define TCGV_HIGH(t) ((t) + 1)
283 #endif /* DEBUG_TCGV */
285 #define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
286 #define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
288 /* Dummy definition to avoid compiler warnings. */
289 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
290 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
292 #define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
293 #define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
296 /* Helper does not read globals (either directly or through an exception). It
297 implies TCG_CALL_NO_WRITE_GLOBALS. */
298 #define TCG_CALL_NO_READ_GLOBALS 0x0010
299 /* Helper does not write globals */
300 #define TCG_CALL_NO_WRITE_GLOBALS 0x0020
301 /* Helper can be safely suppressed if the return value is not used. */
302 #define TCG_CALL_NO_SIDE_EFFECTS 0x0040
304 /* convenience version of most used call flags */
305 #define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS
306 #define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS
307 #define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS
308 #define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
309 #define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
311 /* used to align parameters */
312 #define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
313 #define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
315 /* Conditions. Note that these are laid out for easy manipulation by
317 bit 0 is used for inverting;
320 bit 3 is used with bit 0 for swapping signed/unsigned. */
323 TCG_COND_NEVER = 0 | 0 | 0 | 0,
324 TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
325 TCG_COND_EQ = 8 | 0 | 0 | 0,
326 TCG_COND_NE = 8 | 0 | 0 | 1,
328 TCG_COND_LT = 0 | 0 | 2 | 0,
329 TCG_COND_GE = 0 | 0 | 2 | 1,
330 TCG_COND_LE = 8 | 0 | 2 | 0,
331 TCG_COND_GT = 8 | 0 | 2 | 1,
333 TCG_COND_LTU = 0 | 4 | 0 | 0,
334 TCG_COND_GEU = 0 | 4 | 0 | 1,
335 TCG_COND_LEU = 8 | 4 | 0 | 0,
336 TCG_COND_GTU = 8 | 4 | 0 | 1,
339 /* Invert the sense of the comparison. */
340 static inline TCGCond tcg_invert_cond(TCGCond c)
342 return (TCGCond)(c ^ 1);
345 /* Swap the operands in a comparison. */
346 static inline TCGCond tcg_swap_cond(TCGCond c)
348 return c & 6 ? (TCGCond)(c ^ 9) : c;
351 /* Create an "unsigned" version of a "signed" comparison. */
352 static inline TCGCond tcg_unsigned_cond(TCGCond c)
354 return c & 2 ? (TCGCond)(c ^ 6) : c;
357 /* Must a comparison be considered unsigned? */
358 static inline bool is_unsigned_cond(TCGCond c)
363 /* Create a "high" version of a double-word comparison.
364 This removes equality from a LTE or GTE comparison. */
365 static inline TCGCond tcg_high_cond(TCGCond c)
372 return (TCGCond)(c ^ 8);
378 #define TEMP_VAL_DEAD 0
379 #define TEMP_VAL_REG 1
380 #define TEMP_VAL_MEM 2
381 #define TEMP_VAL_CONST 3
383 /* XXX: optimize memory layout */
384 typedef struct TCGTemp {
391 tcg_target_long mem_offset;
392 unsigned int fixed_reg:1;
393 unsigned int mem_coherent:1;
394 unsigned int mem_allocated:1;
395 unsigned int temp_local:1; /* If true, the temp is saved across
396 basic blocks. Otherwise, it is not
397 preserved across basic blocks. */
398 unsigned int temp_allocated:1; /* never used for code gen */
399 /* index of next free temp of same base type, -1 if end */
404 typedef struct TCGHelperInfo {
405 tcg_target_ulong func;
409 typedef struct TCGContext TCGContext;
412 uint8_t *pool_cur, *pool_end;
413 TCGPool *pool_first, *pool_current, *pool_first_large;
418 /* index of free temps, -1 if none */
419 int first_free_temp[TCG_TYPE_COUNT * 2];
421 /* goto_tb support */
424 uint16_t *tb_next_offset;
425 uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
427 /* liveness analysis */
428 uint16_t *op_dead_args; /* for each operation, each bit tells if the
429 corresponding argument is dead */
430 uint8_t *op_sync_args; /* for each operation, each bit tells if the
431 corresponding output argument needs to be
434 /* tells in which temporary a given register is. It does not take
435 into account fixed registers */
436 int reg_to_temp[TCG_TARGET_NB_REGS];
437 TCGRegSet reserved_regs;
438 tcg_target_long current_frame_offset;
439 tcg_target_long frame_start;
440 tcg_target_long frame_end;
444 TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
446 TCGHelperInfo *helpers;
448 int allocated_helpers;
451 #ifdef CONFIG_PROFILER
455 int64_t op_count; /* total insn count */
456 int op_count_max; /* max insn per TB */
459 int64_t del_op_count;
461 int64_t code_out_len;
466 int64_t restore_count;
467 int64_t restore_time;
470 #ifdef CONFIG_DEBUG_TCG
472 int goto_tb_issue_mask;
475 uint16_t gen_opc_buf[OPC_BUF_SIZE];
476 TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
478 uint16_t *gen_opc_ptr;
479 TCGArg *gen_opparam_ptr;
480 target_ulong gen_opc_pc[OPC_BUF_SIZE];
481 uint16_t gen_opc_icount[OPC_BUF_SIZE];
482 uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
484 /* Code generation */
485 int code_gen_max_blocks;
486 uint8_t *code_gen_prologue;
487 uint8_t *code_gen_buffer;
488 size_t code_gen_buffer_size;
489 /* threshold to flush the translated code buffer */
490 size_t code_gen_buffer_max_size;
491 uint8_t *code_gen_ptr;
495 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
496 /* labels info for qemu_ld/st IRs
497 The labels help to generate TLB miss case codes at the end of TB */
498 TCGLabelQemuLdst *qemu_ldst_labels;
499 int nb_qemu_ldst_labels;
503 extern TCGContext tcg_ctx;
505 /* pool based memory allocation */
507 void *tcg_malloc_internal(TCGContext *s, int size);
508 void tcg_pool_reset(TCGContext *s);
509 void tcg_pool_delete(TCGContext *s);
511 static inline void *tcg_malloc(int size)
513 TCGContext *s = &tcg_ctx;
514 uint8_t *ptr, *ptr_end;
515 size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
517 ptr_end = ptr + size;
518 if (unlikely(ptr_end > s->pool_end)) {
519 return tcg_malloc_internal(&tcg_ctx, size);
521 s->pool_cur = ptr_end;
526 void tcg_context_init(TCGContext *s);
527 void tcg_prologue_init(TCGContext *s);
528 void tcg_func_start(TCGContext *s);
530 int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf);
531 int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);
533 void tcg_set_frame(TCGContext *s, int reg,
534 tcg_target_long start, tcg_target_long size);
536 TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
537 TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
539 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
540 static inline TCGv_i32 tcg_temp_new_i32(void)
542 return tcg_temp_new_internal_i32(0);
544 static inline TCGv_i32 tcg_temp_local_new_i32(void)
546 return tcg_temp_new_internal_i32(1);
548 void tcg_temp_free_i32(TCGv_i32 arg);
549 char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
551 TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
552 TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
554 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
555 static inline TCGv_i64 tcg_temp_new_i64(void)
557 return tcg_temp_new_internal_i64(0);
559 static inline TCGv_i64 tcg_temp_local_new_i64(void)
561 return tcg_temp_new_internal_i64(1);
563 void tcg_temp_free_i64(TCGv_i64 arg);
564 char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
566 #if defined(CONFIG_DEBUG_TCG)
567 /* If you call tcg_clear_temp_count() at the start of a section of
568 * code which is not supposed to leak any TCG temporaries, then
569 * calling tcg_check_temp_count() at the end of the section will
570 * return 1 if the section did in fact leak a temporary.
572 void tcg_clear_temp_count(void);
573 int tcg_check_temp_count(void);
575 #define tcg_clear_temp_count() do { } while (0)
576 #define tcg_check_temp_count() 0
579 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
581 #define TCG_CT_ALIAS 0x80
582 #define TCG_CT_IALIAS 0x40
583 #define TCG_CT_REG 0x01
584 #define TCG_CT_CONST 0x02 /* any constant of register size */
586 typedef struct TCGArgConstraint {
594 #define TCG_MAX_OP_ARGS 16
596 /* Bits for TCGOpDef->flags, 8 bits available. */
598 /* Instruction defines the end of a basic block. */
599 TCG_OPF_BB_END = 0x01,
600 /* Instruction clobbers call registers and potentially update globals. */
601 TCG_OPF_CALL_CLOBBER = 0x02,
602 /* Instruction has side effects: it cannot be removed if its outputs
603 are not used, and might trigger exceptions. */
604 TCG_OPF_SIDE_EFFECTS = 0x04,
605 /* Instruction operands are 64-bits (otherwise 32-bits). */
606 TCG_OPF_64BIT = 0x08,
607 /* Instruction is optional and not implemented by the host, or insn
608 is generic and should not be implemened by the host. */
609 TCG_OPF_NOT_PRESENT = 0x10,
612 typedef struct TCGOpDef {
614 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
616 TCGArgConstraint *args_ct;
618 #if defined(CONFIG_DEBUG_TCG)
623 extern TCGOpDef tcg_op_defs[];
624 extern const size_t tcg_op_defs_max;
626 typedef struct TCGTargetOpDef {
628 const char *args_ct_str[TCG_MAX_OP_ARGS];
631 #define tcg_abort() \
633 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
637 #ifdef CONFIG_DEBUG_TCG
638 # define tcg_debug_assert(X) do { assert(X); } while (0)
639 #elif QEMU_GNUC_PREREQ(4, 5)
640 # define tcg_debug_assert(X) \
641 do { if (!(X)) { __builtin_unreachable(); } } while (0)
643 # define tcg_debug_assert(X) do { (void)(X); } while (0)
646 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
648 #if UINTPTR_MAX == UINT32_MAX
649 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
650 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
652 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((intptr_t)(V)))
653 #define tcg_global_reg_new_ptr(R, N) \
654 TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
655 #define tcg_global_mem_new_ptr(R, O, N) \
656 TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
657 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
658 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
660 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
661 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
663 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((intptr_t)(V)))
664 #define tcg_global_reg_new_ptr(R, N) \
665 TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
666 #define tcg_global_mem_new_ptr(R, O, N) \
667 TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
668 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
669 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
672 void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
673 int sizemask, TCGArg ret, int nargs, TCGArg *args);
675 void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
676 int c, int right, int arith);
678 TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr, TCGArg *args,
679 TCGOpDef *tcg_op_def);
681 /* only used for debugging purposes */
682 void tcg_register_helper(void *func, const char *name);
683 const char *tcg_helper_get_name(TCGContext *s, void *func);
684 void tcg_dump_ops(TCGContext *s);
686 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
687 TCGv_i32 tcg_const_i32(int32_t val);
688 TCGv_i64 tcg_const_i64(int64_t val);
689 TCGv_i32 tcg_const_local_i32(int32_t val);
690 TCGv_i64 tcg_const_local_i64(int64_t val);
694 * @env: CPUArchState * for the CPU
695 * @tb_ptr: address of generated code for the TB to execute
697 * Start executing code from a given translation block.
698 * Where translation blocks have been linked, execution
699 * may proceed from the given TB into successive ones.
700 * Control eventually returns only when some action is needed
701 * from the top-level loop: either control must pass to a TB
702 * which has not yet been directly linked, or an asynchronous
703 * event such as an interrupt needs handling.
705 * The return value is a pointer to the next TB to execute
706 * (if known; otherwise zero). This pointer is assumed to be
707 * 4-aligned, and the bottom two bits are used to return further
709 * 0, 1: the link between this TB and the next is via the specified
710 * TB index (0 or 1). That is, we left the TB via (the equivalent
711 * of) "goto_tb <index>". The main loop uses this to determine
712 * how to link the TB just executed to the next.
713 * 2: we are using instruction counting code generation, and we
714 * did not start executing this TB because the instruction counter
715 * would hit zero midway through it. In this case the next-TB pointer
716 * returned is the TB we were about to execute, and the caller must
717 * arrange to execute the remaining count of instructions.
718 * 3: we stopped because the CPU's exit_request flag was set
719 * (usually meaning that there is an interrupt that needs to be
720 * handled). The next-TB pointer returned is the TB we were
721 * about to execute when we noticed the pending exit request.
723 * If the bottom two bits indicate an exit-via-index then the CPU
724 * state is correctly synchronised and ready for execution of the next
725 * TB (and in particular the guest PC is the address to execute next).
726 * Otherwise, we gave up on execution of this TB before it started, and
727 * the caller must fix up the CPU state by calling cpu_pc_from_tb()
728 * with the next-TB pointer we return.
730 * Note that TCG targets may use a different definition of tcg_qemu_tb_exec
731 * to this default (which just calls the prologue.code emitted by
732 * tcg_target_qemu_prologue()).
734 #define TB_EXIT_MASK 3
735 #define TB_EXIT_IDX0 0
736 #define TB_EXIT_IDX1 1
737 #define TB_EXIT_ICOUNT_EXPIRED 2
738 #define TB_EXIT_REQUESTED 3
740 #if !defined(tcg_qemu_tb_exec)
741 # define tcg_qemu_tb_exec(env, tb_ptr) \
742 ((uintptr_t (*)(void *, void *))tcg_ctx.code_gen_prologue)(env, tb_ptr)
745 void tcg_register_jit(void *buf, size_t buf_size);
747 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
748 /* Generate TB finalization at the end of block */
749 void tcg_out_tb_finalize(TCGContext *s);