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 /* 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
32 # error Unknown pointer size for tcg target
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
49 #include "tcg-target.h"
50 #include "tcg-runtime.h"
52 #if TCG_TARGET_NB_REGS <= 32
53 typedef uint32_t TCGRegSet;
54 #elif TCG_TARGET_NB_REGS <= 64
55 typedef uint64_t TCGRegSet;
60 #if TCG_TARGET_REG_BITS == 32
61 /* Turn some undef macros into false macros. */
62 #define TCG_TARGET_HAS_div_i64 0
63 #define TCG_TARGET_HAS_rem_i64 0
64 #define TCG_TARGET_HAS_div2_i64 0
65 #define TCG_TARGET_HAS_rot_i64 0
66 #define TCG_TARGET_HAS_ext8s_i64 0
67 #define TCG_TARGET_HAS_ext16s_i64 0
68 #define TCG_TARGET_HAS_ext32s_i64 0
69 #define TCG_TARGET_HAS_ext8u_i64 0
70 #define TCG_TARGET_HAS_ext16u_i64 0
71 #define TCG_TARGET_HAS_ext32u_i64 0
72 #define TCG_TARGET_HAS_bswap16_i64 0
73 #define TCG_TARGET_HAS_bswap32_i64 0
74 #define TCG_TARGET_HAS_bswap64_i64 0
75 #define TCG_TARGET_HAS_neg_i64 0
76 #define TCG_TARGET_HAS_not_i64 0
77 #define TCG_TARGET_HAS_andc_i64 0
78 #define TCG_TARGET_HAS_orc_i64 0
79 #define TCG_TARGET_HAS_eqv_i64 0
80 #define TCG_TARGET_HAS_nand_i64 0
81 #define TCG_TARGET_HAS_nor_i64 0
82 #define TCG_TARGET_HAS_deposit_i64 0
83 #define TCG_TARGET_HAS_movcond_i64 0
84 #define TCG_TARGET_HAS_add2_i64 0
85 #define TCG_TARGET_HAS_sub2_i64 0
86 #define TCG_TARGET_HAS_mulu2_i64 0
87 #define TCG_TARGET_HAS_muls2_i64 0
88 #define TCG_TARGET_HAS_muluh_i64 0
89 #define TCG_TARGET_HAS_mulsh_i64 0
90 /* Turn some undef macros into true macros. */
91 #define TCG_TARGET_HAS_add2_i32 1
92 #define TCG_TARGET_HAS_sub2_i32 1
93 #define TCG_TARGET_HAS_mulu2_i32 1
96 #ifndef TCG_TARGET_deposit_i32_valid
97 #define TCG_TARGET_deposit_i32_valid(ofs, len) 1
99 #ifndef TCG_TARGET_deposit_i64_valid
100 #define TCG_TARGET_deposit_i64_valid(ofs, len) 1
103 /* Only one of DIV or DIV2 should be defined. */
104 #if defined(TCG_TARGET_HAS_div_i32)
105 #define TCG_TARGET_HAS_div2_i32 0
106 #elif defined(TCG_TARGET_HAS_div2_i32)
107 #define TCG_TARGET_HAS_div_i32 0
108 #define TCG_TARGET_HAS_rem_i32 0
110 #if defined(TCG_TARGET_HAS_div_i64)
111 #define TCG_TARGET_HAS_div2_i64 0
112 #elif defined(TCG_TARGET_HAS_div2_i64)
113 #define TCG_TARGET_HAS_div_i64 0
114 #define TCG_TARGET_HAS_rem_i64 0
117 typedef enum TCGOpcode {
118 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
124 #define tcg_regset_clear(d) (d) = 0
125 #define tcg_regset_set(d, s) (d) = (s)
126 #define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
127 #define tcg_regset_set_reg(d, r) (d) |= 1L << (r)
128 #define tcg_regset_reset_reg(d, r) (d) &= ~(1L << (r))
129 #define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
130 #define tcg_regset_or(d, a, b) (d) = (a) | (b)
131 #define tcg_regset_and(d, a, b) (d) = (a) & (b)
132 #define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
133 #define tcg_regset_not(d, a) (d) = ~(a)
135 typedef struct TCGRelocation {
136 struct TCGRelocation *next;
139 tcg_target_long addend;
142 typedef struct TCGLabel {
145 tcg_target_ulong value;
146 TCGRelocation *first_reloc;
150 typedef struct TCGPool {
151 struct TCGPool *next;
153 uint8_t data[0] __attribute__ ((aligned));
156 #define TCG_POOL_CHUNK_SIZE 32768
158 #define TCG_MAX_LABELS 512
160 #define TCG_MAX_TEMPS 512
162 /* when the size of the arguments of a called function is smaller than
163 this value, they are statically allocated in the TB stack frame */
164 #define TCG_STATIC_CALL_ARGS_SIZE 128
166 typedef enum TCGType {
169 TCG_TYPE_COUNT, /* number of different types */
171 /* An alias for the size of the host register. */
172 #if TCG_TARGET_REG_BITS == 32
173 TCG_TYPE_REG = TCG_TYPE_I32,
175 TCG_TYPE_REG = TCG_TYPE_I64,
178 /* An alias for the size of the native pointer. We don't currently
179 support any hosts with 64-bit registers and 32-bit pointers. */
180 TCG_TYPE_PTR = TCG_TYPE_REG,
182 /* An alias for the size of the target "long", aka register. */
183 #if TARGET_LONG_BITS == 64
184 TCG_TYPE_TL = TCG_TYPE_I64,
186 TCG_TYPE_TL = TCG_TYPE_I32,
190 typedef tcg_target_ulong TCGArg;
192 /* Define a type and accessor macros for variables. Using a struct is
193 nice because it gives some level of type safely. Ideally the compiler
194 be able to see through all this. However in practice this is not true,
195 especially on targets with braindamaged ABIs (e.g. i386).
196 We use plain int by default to avoid this runtime overhead.
197 Users of tcg_gen_* don't need to know about any of this, and should
198 treat TCGv as an opaque type.
199 In addition we do typechecking for different types of variables. TCGv_i32
200 and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
201 are aliases for target_ulong and host pointer sized values respectively.
204 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
205 /* Macros/structures for qemu_ld/st IR code optimization:
206 TCG_MAX_HELPER_LABELS is defined as same as OPC_BUF_SIZE in exec-all.h. */
207 #define TCG_MAX_QEMU_LDST 640
209 typedef struct TCGLabelQemuLdst {
210 int is_ld:1; /* qemu_ld: 1, qemu_st: 0 */
212 int addrlo_reg; /* reg index for low word of guest virtual addr */
213 int addrhi_reg; /* reg index for high word of guest virtual addr */
214 int datalo_reg; /* reg index for low word to be loaded or stored */
215 int datahi_reg; /* reg index for high word to be loaded or stored */
216 int mem_index; /* soft MMU memory index */
217 uint8_t *raddr; /* gen code addr of the next IR of qemu_ld/st IR */
218 uint8_t *label_ptr[2]; /* label pointers to be updated */
222 #ifdef CONFIG_DEBUG_TCG
242 #define MAKE_TCGV_I32(i) __extension__ \
243 ({ TCGv_i32 make_tcgv_tmp = {i}; make_tcgv_tmp;})
244 #define MAKE_TCGV_I64(i) __extension__ \
245 ({ TCGv_i64 make_tcgv_tmp = {i}; make_tcgv_tmp;})
246 #define MAKE_TCGV_PTR(i) __extension__ \
247 ({ TCGv_ptr make_tcgv_tmp = {i}; make_tcgv_tmp; })
248 #define GET_TCGV_I32(t) ((t).i32)
249 #define GET_TCGV_I64(t) ((t).i64)
250 #define GET_TCGV_PTR(t) ((t).iptr)
251 #if TCG_TARGET_REG_BITS == 32
252 #define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
253 #define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
256 #else /* !DEBUG_TCGV */
258 typedef int TCGv_i32;
259 typedef int TCGv_i64;
260 #if TCG_TARGET_REG_BITS == 32
261 #define TCGv_ptr TCGv_i32
263 #define TCGv_ptr TCGv_i64
265 #define MAKE_TCGV_I32(x) (x)
266 #define MAKE_TCGV_I64(x) (x)
267 #define MAKE_TCGV_PTR(x) (x)
268 #define GET_TCGV_I32(t) (t)
269 #define GET_TCGV_I64(t) (t)
270 #define GET_TCGV_PTR(t) (t)
272 #if TCG_TARGET_REG_BITS == 32
273 #define TCGV_LOW(t) (t)
274 #define TCGV_HIGH(t) ((t) + 1)
277 #endif /* DEBUG_TCGV */
279 #define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
280 #define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
282 /* Dummy definition to avoid compiler warnings. */
283 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
284 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
286 #define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
287 #define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
290 /* Helper does not read globals (either directly or through an exception). It
291 implies TCG_CALL_NO_WRITE_GLOBALS. */
292 #define TCG_CALL_NO_READ_GLOBALS 0x0010
293 /* Helper does not write globals */
294 #define TCG_CALL_NO_WRITE_GLOBALS 0x0020
295 /* Helper can be safely suppressed if the return value is not used. */
296 #define TCG_CALL_NO_SIDE_EFFECTS 0x0040
298 /* convenience version of most used call flags */
299 #define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS
300 #define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS
301 #define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS
302 #define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
303 #define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
305 /* used to align parameters */
306 #define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
307 #define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
309 /* Conditions. Note that these are laid out for easy manipulation by
311 bit 0 is used for inverting;
314 bit 3 is used with bit 0 for swapping signed/unsigned. */
317 TCG_COND_NEVER = 0 | 0 | 0 | 0,
318 TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
319 TCG_COND_EQ = 8 | 0 | 0 | 0,
320 TCG_COND_NE = 8 | 0 | 0 | 1,
322 TCG_COND_LT = 0 | 0 | 2 | 0,
323 TCG_COND_GE = 0 | 0 | 2 | 1,
324 TCG_COND_LE = 8 | 0 | 2 | 0,
325 TCG_COND_GT = 8 | 0 | 2 | 1,
327 TCG_COND_LTU = 0 | 4 | 0 | 0,
328 TCG_COND_GEU = 0 | 4 | 0 | 1,
329 TCG_COND_LEU = 8 | 4 | 0 | 0,
330 TCG_COND_GTU = 8 | 4 | 0 | 1,
333 /* Invert the sense of the comparison. */
334 static inline TCGCond tcg_invert_cond(TCGCond c)
336 return (TCGCond)(c ^ 1);
339 /* Swap the operands in a comparison. */
340 static inline TCGCond tcg_swap_cond(TCGCond c)
342 return c & 6 ? (TCGCond)(c ^ 9) : c;
345 /* Create an "unsigned" version of a "signed" comparison. */
346 static inline TCGCond tcg_unsigned_cond(TCGCond c)
348 return c & 2 ? (TCGCond)(c ^ 6) : c;
351 /* Must a comparison be considered unsigned? */
352 static inline bool is_unsigned_cond(TCGCond c)
357 /* Create a "high" version of a double-word comparison.
358 This removes equality from a LTE or GTE comparison. */
359 static inline TCGCond tcg_high_cond(TCGCond c)
366 return (TCGCond)(c ^ 8);
372 #define TEMP_VAL_DEAD 0
373 #define TEMP_VAL_REG 1
374 #define TEMP_VAL_MEM 2
375 #define TEMP_VAL_CONST 3
377 /* XXX: optimize memory layout */
378 typedef struct TCGTemp {
385 tcg_target_long mem_offset;
386 unsigned int fixed_reg:1;
387 unsigned int mem_coherent:1;
388 unsigned int mem_allocated:1;
389 unsigned int temp_local:1; /* If true, the temp is saved across
390 basic blocks. Otherwise, it is not
391 preserved across basic blocks. */
392 unsigned int temp_allocated:1; /* never used for code gen */
393 /* index of next free temp of same base type, -1 if end */
398 typedef struct TCGHelperInfo {
399 tcg_target_ulong func;
403 typedef struct TCGContext TCGContext;
406 uint8_t *pool_cur, *pool_end;
407 TCGPool *pool_first, *pool_current, *pool_first_large;
412 /* index of free temps, -1 if none */
413 int first_free_temp[TCG_TYPE_COUNT * 2];
415 /* goto_tb support */
418 uint16_t *tb_next_offset;
419 uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
421 /* liveness analysis */
422 uint16_t *op_dead_args; /* for each operation, each bit tells if the
423 corresponding argument is dead */
424 uint8_t *op_sync_args; /* for each operation, each bit tells if the
425 corresponding output argument needs to be
428 /* tells in which temporary a given register is. It does not take
429 into account fixed registers */
430 int reg_to_temp[TCG_TARGET_NB_REGS];
431 TCGRegSet reserved_regs;
432 tcg_target_long current_frame_offset;
433 tcg_target_long frame_start;
434 tcg_target_long frame_end;
438 TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
440 TCGHelperInfo *helpers;
442 int allocated_helpers;
445 #ifdef CONFIG_PROFILER
449 int64_t op_count; /* total insn count */
450 int op_count_max; /* max insn per TB */
453 int64_t del_op_count;
455 int64_t code_out_len;
460 int64_t restore_count;
461 int64_t restore_time;
464 #ifdef CONFIG_DEBUG_TCG
466 int goto_tb_issue_mask;
469 uint16_t gen_opc_buf[OPC_BUF_SIZE];
470 TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
472 uint16_t *gen_opc_ptr;
473 TCGArg *gen_opparam_ptr;
474 target_ulong gen_opc_pc[OPC_BUF_SIZE];
475 uint16_t gen_opc_icount[OPC_BUF_SIZE];
476 uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
478 /* Code generation */
479 int code_gen_max_blocks;
480 uint8_t *code_gen_prologue;
481 uint8_t *code_gen_buffer;
482 size_t code_gen_buffer_size;
483 /* threshold to flush the translated code buffer */
484 size_t code_gen_buffer_max_size;
485 uint8_t *code_gen_ptr;
489 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
490 /* labels info for qemu_ld/st IRs
491 The labels help to generate TLB miss case codes at the end of TB */
492 TCGLabelQemuLdst *qemu_ldst_labels;
493 int nb_qemu_ldst_labels;
497 extern TCGContext tcg_ctx;
499 /* pool based memory allocation */
501 void *tcg_malloc_internal(TCGContext *s, int size);
502 void tcg_pool_reset(TCGContext *s);
503 void tcg_pool_delete(TCGContext *s);
505 static inline void *tcg_malloc(int size)
507 TCGContext *s = &tcg_ctx;
508 uint8_t *ptr, *ptr_end;
509 size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
511 ptr_end = ptr + size;
512 if (unlikely(ptr_end > s->pool_end)) {
513 return tcg_malloc_internal(&tcg_ctx, size);
515 s->pool_cur = ptr_end;
520 void tcg_context_init(TCGContext *s);
521 void tcg_prologue_init(TCGContext *s);
522 void tcg_func_start(TCGContext *s);
524 int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf);
525 int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);
527 void tcg_set_frame(TCGContext *s, int reg,
528 tcg_target_long start, tcg_target_long size);
530 TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
531 TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
533 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
534 static inline TCGv_i32 tcg_temp_new_i32(void)
536 return tcg_temp_new_internal_i32(0);
538 static inline TCGv_i32 tcg_temp_local_new_i32(void)
540 return tcg_temp_new_internal_i32(1);
542 void tcg_temp_free_i32(TCGv_i32 arg);
543 char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
545 TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
546 TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
548 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
549 static inline TCGv_i64 tcg_temp_new_i64(void)
551 return tcg_temp_new_internal_i64(0);
553 static inline TCGv_i64 tcg_temp_local_new_i64(void)
555 return tcg_temp_new_internal_i64(1);
557 void tcg_temp_free_i64(TCGv_i64 arg);
558 char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
560 #if defined(CONFIG_DEBUG_TCG)
561 /* If you call tcg_clear_temp_count() at the start of a section of
562 * code which is not supposed to leak any TCG temporaries, then
563 * calling tcg_check_temp_count() at the end of the section will
564 * return 1 if the section did in fact leak a temporary.
566 void tcg_clear_temp_count(void);
567 int tcg_check_temp_count(void);
569 #define tcg_clear_temp_count() do { } while (0)
570 #define tcg_check_temp_count() 0
573 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
575 #define TCG_CT_ALIAS 0x80
576 #define TCG_CT_IALIAS 0x40
577 #define TCG_CT_REG 0x01
578 #define TCG_CT_CONST 0x02 /* any constant of register size */
580 typedef struct TCGArgConstraint {
588 #define TCG_MAX_OP_ARGS 16
590 /* Bits for TCGOpDef->flags, 8 bits available. */
592 /* Instruction defines the end of a basic block. */
593 TCG_OPF_BB_END = 0x01,
594 /* Instruction clobbers call registers and potentially update globals. */
595 TCG_OPF_CALL_CLOBBER = 0x02,
596 /* Instruction has side effects: it cannot be removed if its outputs
597 are not used, and might trigger exceptions. */
598 TCG_OPF_SIDE_EFFECTS = 0x04,
599 /* Instruction operands are 64-bits (otherwise 32-bits). */
600 TCG_OPF_64BIT = 0x08,
601 /* Instruction is optional and not implemented by the host, or insn
602 is generic and should not be implemened by the host. */
603 TCG_OPF_NOT_PRESENT = 0x10,
606 typedef struct TCGOpDef {
608 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
610 TCGArgConstraint *args_ct;
612 #if defined(CONFIG_DEBUG_TCG)
617 extern TCGOpDef tcg_op_defs[];
618 extern const size_t tcg_op_defs_max;
620 typedef struct TCGTargetOpDef {
622 const char *args_ct_str[TCG_MAX_OP_ARGS];
625 #define tcg_abort() \
627 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
631 #ifdef CONFIG_DEBUG_TCG
632 # define tcg_debug_assert(X) do { assert(X); } while (0)
633 #elif QEMU_GNUC_PREREQ(4, 5)
634 # define tcg_debug_assert(X) \
635 do { if (!(X)) { __builtin_unreachable(); } } while (0)
637 # define tcg_debug_assert(X) do { (void)(X); } while (0)
640 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
642 #if TCG_TARGET_REG_BITS == 32
643 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
644 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
646 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((tcg_target_long)(V)))
647 #define tcg_global_reg_new_ptr(R, N) \
648 TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
649 #define tcg_global_mem_new_ptr(R, O, N) \
650 TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
651 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
652 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
654 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
655 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
657 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((tcg_target_long)(V)))
658 #define tcg_global_reg_new_ptr(R, N) \
659 TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
660 #define tcg_global_mem_new_ptr(R, O, N) \
661 TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
662 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
663 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
666 void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
667 int sizemask, TCGArg ret, int nargs, TCGArg *args);
669 void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
670 int c, int right, int arith);
672 TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr, TCGArg *args,
673 TCGOpDef *tcg_op_def);
675 /* only used for debugging purposes */
676 void tcg_register_helper(void *func, const char *name);
677 const char *tcg_helper_get_name(TCGContext *s, void *func);
678 void tcg_dump_ops(TCGContext *s);
680 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
681 TCGv_i32 tcg_const_i32(int32_t val);
682 TCGv_i64 tcg_const_i64(int64_t val);
683 TCGv_i32 tcg_const_local_i32(int32_t val);
684 TCGv_i64 tcg_const_local_i64(int64_t val);
688 * @env: CPUArchState * for the CPU
689 * @tb_ptr: address of generated code for the TB to execute
691 * Start executing code from a given translation block.
692 * Where translation blocks have been linked, execution
693 * may proceed from the given TB into successive ones.
694 * Control eventually returns only when some action is needed
695 * from the top-level loop: either control must pass to a TB
696 * which has not yet been directly linked, or an asynchronous
697 * event such as an interrupt needs handling.
699 * The return value is a pointer to the next TB to execute
700 * (if known; otherwise zero). This pointer is assumed to be
701 * 4-aligned, and the bottom two bits are used to return further
703 * 0, 1: the link between this TB and the next is via the specified
704 * TB index (0 or 1). That is, we left the TB via (the equivalent
705 * of) "goto_tb <index>". The main loop uses this to determine
706 * how to link the TB just executed to the next.
707 * 2: we are using instruction counting code generation, and we
708 * did not start executing this TB because the instruction counter
709 * would hit zero midway through it. In this case the next-TB pointer
710 * returned is the TB we were about to execute, and the caller must
711 * arrange to execute the remaining count of instructions.
712 * 3: we stopped because the CPU's exit_request flag was set
713 * (usually meaning that there is an interrupt that needs to be
714 * handled). The next-TB pointer returned is the TB we were
715 * about to execute when we noticed the pending exit request.
717 * If the bottom two bits indicate an exit-via-index then the CPU
718 * state is correctly synchronised and ready for execution of the next
719 * TB (and in particular the guest PC is the address to execute next).
720 * Otherwise, we gave up on execution of this TB before it started, and
721 * the caller must fix up the CPU state by calling cpu_pc_from_tb()
722 * with the next-TB pointer we return.
724 * Note that TCG targets may use a different definition of tcg_qemu_tb_exec
725 * to this default (which just calls the prologue.code emitted by
726 * tcg_target_qemu_prologue()).
728 #define TB_EXIT_MASK 3
729 #define TB_EXIT_IDX0 0
730 #define TB_EXIT_IDX1 1
731 #define TB_EXIT_ICOUNT_EXPIRED 2
732 #define TB_EXIT_REQUESTED 3
734 #if !defined(tcg_qemu_tb_exec)
735 # define tcg_qemu_tb_exec(env, tb_ptr) \
736 ((tcg_target_ulong (*)(void *, void *))tcg_ctx.code_gen_prologue)(env, \
740 void tcg_register_jit(void *buf, size_t buf_size);
742 #if defined(CONFIG_QEMU_LDST_OPTIMIZATION) && defined(CONFIG_SOFTMMU)
743 /* Generate TB finalization at the end of block */
744 void tcg_out_tb_finalize(TCGContext *s);