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
28 #include "qemu-common.h"
29 #include "qemu/bitops.h"
30 #include "tcg-target.h"
32 #define CPU_TEMP_BUF_NLONGS 128
34 /* Default target word size to pointer size. */
35 #ifndef TCG_TARGET_REG_BITS
36 # if UINTPTR_MAX == UINT32_MAX
37 # define TCG_TARGET_REG_BITS 32
38 # elif UINTPTR_MAX == UINT64_MAX
39 # define TCG_TARGET_REG_BITS 64
41 # error Unknown pointer size for tcg target
45 #if TCG_TARGET_REG_BITS == 32
46 typedef int32_t tcg_target_long
;
47 typedef uint32_t tcg_target_ulong
;
48 #define TCG_PRIlx PRIx32
49 #define TCG_PRIld PRId32
50 #elif TCG_TARGET_REG_BITS == 64
51 typedef int64_t tcg_target_long
;
52 typedef uint64_t tcg_target_ulong
;
53 #define TCG_PRIlx PRIx64
54 #define TCG_PRIld PRId64
59 #if TCG_TARGET_NB_REGS <= 32
60 typedef uint32_t TCGRegSet
;
61 #elif TCG_TARGET_NB_REGS <= 64
62 typedef uint64_t TCGRegSet
;
67 #if TCG_TARGET_REG_BITS == 32
68 /* Turn some undef macros into false macros. */
69 #define TCG_TARGET_HAS_extrl_i64_i32 0
70 #define TCG_TARGET_HAS_extrh_i64_i32 0
71 #define TCG_TARGET_HAS_div_i64 0
72 #define TCG_TARGET_HAS_rem_i64 0
73 #define TCG_TARGET_HAS_div2_i64 0
74 #define TCG_TARGET_HAS_rot_i64 0
75 #define TCG_TARGET_HAS_ext8s_i64 0
76 #define TCG_TARGET_HAS_ext16s_i64 0
77 #define TCG_TARGET_HAS_ext32s_i64 0
78 #define TCG_TARGET_HAS_ext8u_i64 0
79 #define TCG_TARGET_HAS_ext16u_i64 0
80 #define TCG_TARGET_HAS_ext32u_i64 0
81 #define TCG_TARGET_HAS_bswap16_i64 0
82 #define TCG_TARGET_HAS_bswap32_i64 0
83 #define TCG_TARGET_HAS_bswap64_i64 0
84 #define TCG_TARGET_HAS_neg_i64 0
85 #define TCG_TARGET_HAS_not_i64 0
86 #define TCG_TARGET_HAS_andc_i64 0
87 #define TCG_TARGET_HAS_orc_i64 0
88 #define TCG_TARGET_HAS_eqv_i64 0
89 #define TCG_TARGET_HAS_nand_i64 0
90 #define TCG_TARGET_HAS_nor_i64 0
91 #define TCG_TARGET_HAS_deposit_i64 0
92 #define TCG_TARGET_HAS_movcond_i64 0
93 #define TCG_TARGET_HAS_add2_i64 0
94 #define TCG_TARGET_HAS_sub2_i64 0
95 #define TCG_TARGET_HAS_mulu2_i64 0
96 #define TCG_TARGET_HAS_muls2_i64 0
97 #define TCG_TARGET_HAS_muluh_i64 0
98 #define TCG_TARGET_HAS_mulsh_i64 0
99 /* Turn some undef macros into true macros. */
100 #define TCG_TARGET_HAS_add2_i32 1
101 #define TCG_TARGET_HAS_sub2_i32 1
104 #ifndef TCG_TARGET_deposit_i32_valid
105 #define TCG_TARGET_deposit_i32_valid(ofs, len) 1
107 #ifndef TCG_TARGET_deposit_i64_valid
108 #define TCG_TARGET_deposit_i64_valid(ofs, len) 1
111 /* Only one of DIV or DIV2 should be defined. */
112 #if defined(TCG_TARGET_HAS_div_i32)
113 #define TCG_TARGET_HAS_div2_i32 0
114 #elif defined(TCG_TARGET_HAS_div2_i32)
115 #define TCG_TARGET_HAS_div_i32 0
116 #define TCG_TARGET_HAS_rem_i32 0
118 #if defined(TCG_TARGET_HAS_div_i64)
119 #define TCG_TARGET_HAS_div2_i64 0
120 #elif defined(TCG_TARGET_HAS_div2_i64)
121 #define TCG_TARGET_HAS_div_i64 0
122 #define TCG_TARGET_HAS_rem_i64 0
125 /* For 32-bit targets, some sort of unsigned widening multiply is required. */
126 #if TCG_TARGET_REG_BITS == 32 \
127 && !(defined(TCG_TARGET_HAS_mulu2_i32) \
128 || defined(TCG_TARGET_HAS_muluh_i32))
129 # error "Missing unsigned widening multiply"
132 #ifndef TARGET_INSN_START_EXTRA_WORDS
133 # define TARGET_INSN_START_WORDS 1
135 # define TARGET_INSN_START_WORDS (1 + TARGET_INSN_START_EXTRA_WORDS)
138 typedef enum TCGOpcode
{
139 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
145 #define tcg_regset_clear(d) (d) = 0
146 #define tcg_regset_set(d, s) (d) = (s)
147 #define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
148 #define tcg_regset_set_reg(d, r) (d) |= 1L << (r)
149 #define tcg_regset_reset_reg(d, r) (d) &= ~(1L << (r))
150 #define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
151 #define tcg_regset_or(d, a, b) (d) = (a) | (b)
152 #define tcg_regset_and(d, a, b) (d) = (a) & (b)
153 #define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
154 #define tcg_regset_not(d, a) (d) = ~(a)
156 #ifndef TCG_TARGET_INSN_UNIT_SIZE
157 # error "Missing TCG_TARGET_INSN_UNIT_SIZE"
158 #elif TCG_TARGET_INSN_UNIT_SIZE == 1
159 typedef uint8_t tcg_insn_unit
;
160 #elif TCG_TARGET_INSN_UNIT_SIZE == 2
161 typedef uint16_t tcg_insn_unit
;
162 #elif TCG_TARGET_INSN_UNIT_SIZE == 4
163 typedef uint32_t tcg_insn_unit
;
164 #elif TCG_TARGET_INSN_UNIT_SIZE == 8
165 typedef uint64_t tcg_insn_unit
;
167 /* The port better have done this. */
171 typedef struct TCGRelocation
{
172 struct TCGRelocation
*next
;
178 typedef struct TCGLabel
{
179 unsigned has_value
: 1;
183 tcg_insn_unit
*value_ptr
;
184 TCGRelocation
*first_reloc
;
188 typedef struct TCGPool
{
189 struct TCGPool
*next
;
191 uint8_t data
[0] __attribute__ ((aligned
));
194 #define TCG_POOL_CHUNK_SIZE 32768
196 #define TCG_MAX_TEMPS 512
197 #define TCG_MAX_INSNS 512
199 /* when the size of the arguments of a called function is smaller than
200 this value, they are statically allocated in the TB stack frame */
201 #define TCG_STATIC_CALL_ARGS_SIZE 128
203 typedef enum TCGType
{
206 TCG_TYPE_COUNT
, /* number of different types */
208 /* An alias for the size of the host register. */
209 #if TCG_TARGET_REG_BITS == 32
210 TCG_TYPE_REG
= TCG_TYPE_I32
,
212 TCG_TYPE_REG
= TCG_TYPE_I64
,
215 /* An alias for the size of the native pointer. */
216 #if UINTPTR_MAX == UINT32_MAX
217 TCG_TYPE_PTR
= TCG_TYPE_I32
,
219 TCG_TYPE_PTR
= TCG_TYPE_I64
,
222 /* An alias for the size of the target "long", aka register. */
223 #if TARGET_LONG_BITS == 64
224 TCG_TYPE_TL
= TCG_TYPE_I64
,
226 TCG_TYPE_TL
= TCG_TYPE_I32
,
230 /* Constants for qemu_ld and qemu_st for the Memory Operation field. */
231 typedef enum TCGMemOp
{
236 MO_SIZE
= 3, /* Mask for the above. */
238 MO_SIGN
= 4, /* Sign-extended, otherwise zero-extended. */
240 MO_BSWAP
= 8, /* Host reverse endian. */
241 #ifdef HOST_WORDS_BIGENDIAN
248 #ifdef TARGET_WORDS_BIGENDIAN
254 /* MO_UNALN accesses are never checked for alignment.
255 MO_ALIGN accesses will result in a call to the CPU's
256 do_unaligned_access hook if the guest address is not aligned.
257 The default depends on whether the target CPU defines ALIGNED_ONLY. */
267 /* Combinations of the above, for ease of use. */
271 MO_SB
= MO_SIGN
| MO_8
,
272 MO_SW
= MO_SIGN
| MO_16
,
273 MO_SL
= MO_SIGN
| MO_32
,
276 MO_LEUW
= MO_LE
| MO_UW
,
277 MO_LEUL
= MO_LE
| MO_UL
,
278 MO_LESW
= MO_LE
| MO_SW
,
279 MO_LESL
= MO_LE
| MO_SL
,
280 MO_LEQ
= MO_LE
| MO_Q
,
282 MO_BEUW
= MO_BE
| MO_UW
,
283 MO_BEUL
= MO_BE
| MO_UL
,
284 MO_BESW
= MO_BE
| MO_SW
,
285 MO_BESL
= MO_BE
| MO_SL
,
286 MO_BEQ
= MO_BE
| MO_Q
,
288 MO_TEUW
= MO_TE
| MO_UW
,
289 MO_TEUL
= MO_TE
| MO_UL
,
290 MO_TESW
= MO_TE
| MO_SW
,
291 MO_TESL
= MO_TE
| MO_SL
,
292 MO_TEQ
= MO_TE
| MO_Q
,
294 MO_SSIZE
= MO_SIZE
| MO_SIGN
,
297 typedef tcg_target_ulong TCGArg
;
299 /* Define a type and accessor macros for variables. Using pointer types
300 is nice because it gives some level of type safely. Converting to and
301 from intptr_t rather than int reduces the number of sign-extension
302 instructions that get implied on 64-bit hosts. Users of tcg_gen_* don't
303 need to know about any of this, and should treat TCGv as an opaque type.
304 In addition we do typechecking for different types of variables. TCGv_i32
305 and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
306 are aliases for target_ulong and host pointer sized values respectively. */
308 typedef struct TCGv_i32_d
*TCGv_i32
;
309 typedef struct TCGv_i64_d
*TCGv_i64
;
310 typedef struct TCGv_ptr_d
*TCGv_ptr
;
311 typedef TCGv_ptr TCGv_env
;
312 #if TARGET_LONG_BITS == 32
313 #define TCGv TCGv_i32
314 #elif TARGET_LONG_BITS == 64
315 #define TCGv TCGv_i64
317 #error Unhandled TARGET_LONG_BITS value
320 static inline TCGv_i32 QEMU_ARTIFICIAL
MAKE_TCGV_I32(intptr_t i
)
325 static inline TCGv_i64 QEMU_ARTIFICIAL
MAKE_TCGV_I64(intptr_t i
)
330 static inline TCGv_ptr QEMU_ARTIFICIAL
MAKE_TCGV_PTR(intptr_t i
)
335 static inline intptr_t QEMU_ARTIFICIAL
GET_TCGV_I32(TCGv_i32 t
)
340 static inline intptr_t QEMU_ARTIFICIAL
GET_TCGV_I64(TCGv_i64 t
)
345 static inline intptr_t QEMU_ARTIFICIAL
GET_TCGV_PTR(TCGv_ptr t
)
350 #if TCG_TARGET_REG_BITS == 32
351 #define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
352 #define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
355 #define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
356 #define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
357 #define TCGV_EQUAL_PTR(a, b) (GET_TCGV_PTR(a) == GET_TCGV_PTR(b))
359 /* Dummy definition to avoid compiler warnings. */
360 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
361 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
362 #define TCGV_UNUSED_PTR(x) x = MAKE_TCGV_PTR(-1)
364 #define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
365 #define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
366 #define TCGV_IS_UNUSED_PTR(x) (GET_TCGV_PTR(x) == -1)
369 /* Helper does not read globals (either directly or through an exception). It
370 implies TCG_CALL_NO_WRITE_GLOBALS. */
371 #define TCG_CALL_NO_READ_GLOBALS 0x0010
372 /* Helper does not write globals */
373 #define TCG_CALL_NO_WRITE_GLOBALS 0x0020
374 /* Helper can be safely suppressed if the return value is not used. */
375 #define TCG_CALL_NO_SIDE_EFFECTS 0x0040
377 /* convenience version of most used call flags */
378 #define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS
379 #define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS
380 #define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS
381 #define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
382 #define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
384 /* used to align parameters */
385 #define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
386 #define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
388 /* Conditions. Note that these are laid out for easy manipulation by
390 bit 0 is used for inverting;
393 bit 3 is used with bit 0 for swapping signed/unsigned. */
396 TCG_COND_NEVER
= 0 | 0 | 0 | 0,
397 TCG_COND_ALWAYS
= 0 | 0 | 0 | 1,
398 TCG_COND_EQ
= 8 | 0 | 0 | 0,
399 TCG_COND_NE
= 8 | 0 | 0 | 1,
401 TCG_COND_LT
= 0 | 0 | 2 | 0,
402 TCG_COND_GE
= 0 | 0 | 2 | 1,
403 TCG_COND_LE
= 8 | 0 | 2 | 0,
404 TCG_COND_GT
= 8 | 0 | 2 | 1,
406 TCG_COND_LTU
= 0 | 4 | 0 | 0,
407 TCG_COND_GEU
= 0 | 4 | 0 | 1,
408 TCG_COND_LEU
= 8 | 4 | 0 | 0,
409 TCG_COND_GTU
= 8 | 4 | 0 | 1,
412 /* Invert the sense of the comparison. */
413 static inline TCGCond
tcg_invert_cond(TCGCond c
)
415 return (TCGCond
)(c
^ 1);
418 /* Swap the operands in a comparison. */
419 static inline TCGCond
tcg_swap_cond(TCGCond c
)
421 return c
& 6 ? (TCGCond
)(c
^ 9) : c
;
424 /* Create an "unsigned" version of a "signed" comparison. */
425 static inline TCGCond
tcg_unsigned_cond(TCGCond c
)
427 return c
& 2 ? (TCGCond
)(c
^ 6) : c
;
430 /* Must a comparison be considered unsigned? */
431 static inline bool is_unsigned_cond(TCGCond c
)
436 /* Create a "high" version of a double-word comparison.
437 This removes equality from a LTE or GTE comparison. */
438 static inline TCGCond
tcg_high_cond(TCGCond c
)
445 return (TCGCond
)(c
^ 8);
451 typedef enum TCGTempVal
{
458 typedef struct TCGTemp
{
460 TCGTempVal val_type
:8;
463 unsigned int fixed_reg
:1;
464 unsigned int indirect_reg
:1;
465 unsigned int indirect_base
:1;
466 unsigned int mem_coherent
:1;
467 unsigned int mem_allocated
:1;
468 unsigned int temp_local
:1; /* If true, the temp is saved across
469 basic blocks. Otherwise, it is not
470 preserved across basic blocks. */
471 unsigned int temp_allocated
:1; /* never used for code gen */
474 struct TCGTemp
*mem_base
;
479 typedef struct TCGContext TCGContext
;
481 typedef struct TCGTempSet
{
482 unsigned long l
[BITS_TO_LONGS(TCG_MAX_TEMPS
)];
485 typedef struct TCGOp
{
488 /* The number of out and in parameter for a call. */
492 /* Index of the arguments for this op, or -1 for zero-operand ops. */
495 /* Index of the prex/next op, or -1 for the end of the list. */
500 QEMU_BUILD_BUG_ON(NB_OPS
> 0xff);
501 QEMU_BUILD_BUG_ON(OPC_BUF_SIZE
>= 0x7fff);
502 QEMU_BUILD_BUG_ON(OPPARAM_BUF_SIZE
>= 0x7fff);
505 uint8_t *pool_cur
, *pool_end
;
506 TCGPool
*pool_first
, *pool_current
, *pool_first_large
;
511 /* goto_tb support */
512 tcg_insn_unit
*code_buf
;
513 uint16_t *tb_jmp_reset_offset
; /* tb->jmp_reset_offset */
514 uint16_t *tb_jmp_insn_offset
; /* tb->jmp_insn_offset if USE_DIRECT_JUMP */
515 uintptr_t *tb_jmp_target_addr
; /* tb->jmp_target_addr if !USE_DIRECT_JUMP */
517 /* liveness analysis */
518 uint16_t *op_dead_args
; /* for each operation, each bit tells if the
519 corresponding argument is dead */
520 uint8_t *op_sync_args
; /* for each operation, each bit tells if the
521 corresponding output argument needs to be
524 TCGRegSet reserved_regs
;
525 intptr_t current_frame_offset
;
526 intptr_t frame_start
;
530 tcg_insn_unit
*code_ptr
;
534 #ifdef CONFIG_PROFILER
538 int64_t op_count
; /* total insn count */
539 int op_count_max
; /* max insn per TB */
542 int64_t del_op_count
;
544 int64_t code_out_len
;
545 int64_t search_out_len
;
550 int64_t restore_count
;
551 int64_t restore_time
;
554 #ifdef CONFIG_DEBUG_TCG
556 int goto_tb_issue_mask
;
559 int gen_first_op_idx
;
562 int gen_next_parm_idx
;
564 /* Code generation. Note that we specifically do not use tcg_insn_unit
565 here, because there's too much arithmetic throughout that relies
566 on addition and subtraction working on bytes. Rely on the GCC
567 extension that allows arithmetic on void*. */
568 int code_gen_max_blocks
;
569 void *code_gen_prologue
;
570 void *code_gen_buffer
;
571 size_t code_gen_buffer_size
;
574 /* Threshold to flush the translated code buffer. */
575 void *code_gen_highwater
;
579 /* The TCGBackendData structure is private to tcg-target.inc.c. */
580 struct TCGBackendData
*be
;
582 TCGTempSet free_temps
[TCG_TYPE_COUNT
* 2];
583 TCGTemp temps
[TCG_MAX_TEMPS
]; /* globals first, temps after */
585 /* Tells which temporary holds a given register.
586 It does not take into account fixed registers */
587 TCGTemp
*reg_to_temp
[TCG_TARGET_NB_REGS
];
589 TCGOp gen_op_buf
[OPC_BUF_SIZE
];
590 TCGArg gen_opparam_buf
[OPPARAM_BUF_SIZE
];
592 uint16_t gen_insn_end_off
[TCG_MAX_INSNS
];
593 target_ulong gen_insn_data
[TCG_MAX_INSNS
][TARGET_INSN_START_WORDS
];
596 extern TCGContext tcg_ctx
;
598 static inline void tcg_set_insn_param(int op_idx
, int arg
, TCGArg v
)
600 int op_argi
= tcg_ctx
.gen_op_buf
[op_idx
].args
;
601 tcg_ctx
.gen_opparam_buf
[op_argi
+ arg
] = v
;
604 /* The number of opcodes emitted so far. */
605 static inline int tcg_op_buf_count(void)
607 return tcg_ctx
.gen_next_op_idx
;
610 /* Test for whether to terminate the TB for using too many opcodes. */
611 static inline bool tcg_op_buf_full(void)
613 return tcg_op_buf_count() >= OPC_MAX_SIZE
;
616 /* pool based memory allocation */
618 void *tcg_malloc_internal(TCGContext
*s
, int size
);
619 void tcg_pool_reset(TCGContext
*s
);
620 void tcg_pool_delete(TCGContext
*s
);
623 void tb_unlock(void);
624 void tb_lock_reset(void);
626 static inline void *tcg_malloc(int size
)
628 TCGContext
*s
= &tcg_ctx
;
629 uint8_t *ptr
, *ptr_end
;
630 size
= (size
+ sizeof(long) - 1) & ~(sizeof(long) - 1);
632 ptr_end
= ptr
+ size
;
633 if (unlikely(ptr_end
> s
->pool_end
)) {
634 return tcg_malloc_internal(&tcg_ctx
, size
);
636 s
->pool_cur
= ptr_end
;
641 void tcg_context_init(TCGContext
*s
);
642 void tcg_prologue_init(TCGContext
*s
);
643 void tcg_func_start(TCGContext
*s
);
645 int tcg_gen_code(TCGContext
*s
, TranslationBlock
*tb
);
647 void tcg_set_frame(TCGContext
*s
, TCGReg reg
, intptr_t start
, intptr_t size
);
649 int tcg_global_mem_new_internal(TCGType
, TCGv_ptr
, intptr_t, const char *);
651 TCGv_i32
tcg_global_reg_new_i32(TCGReg reg
, const char *name
);
652 TCGv_i64
tcg_global_reg_new_i64(TCGReg reg
, const char *name
);
654 TCGv_i32
tcg_temp_new_internal_i32(int temp_local
);
655 TCGv_i64
tcg_temp_new_internal_i64(int temp_local
);
657 void tcg_temp_free_i32(TCGv_i32 arg
);
658 void tcg_temp_free_i64(TCGv_i64 arg
);
660 static inline TCGv_i32
tcg_global_mem_new_i32(TCGv_ptr reg
, intptr_t offset
,
663 int idx
= tcg_global_mem_new_internal(TCG_TYPE_I32
, reg
, offset
, name
);
664 return MAKE_TCGV_I32(idx
);
667 static inline TCGv_i32
tcg_temp_new_i32(void)
669 return tcg_temp_new_internal_i32(0);
672 static inline TCGv_i32
tcg_temp_local_new_i32(void)
674 return tcg_temp_new_internal_i32(1);
677 static inline TCGv_i64
tcg_global_mem_new_i64(TCGv_ptr reg
, intptr_t offset
,
680 int idx
= tcg_global_mem_new_internal(TCG_TYPE_I64
, reg
, offset
, name
);
681 return MAKE_TCGV_I64(idx
);
684 static inline TCGv_i64
tcg_temp_new_i64(void)
686 return tcg_temp_new_internal_i64(0);
689 static inline TCGv_i64
tcg_temp_local_new_i64(void)
691 return tcg_temp_new_internal_i64(1);
694 #if defined(CONFIG_DEBUG_TCG)
695 /* If you call tcg_clear_temp_count() at the start of a section of
696 * code which is not supposed to leak any TCG temporaries, then
697 * calling tcg_check_temp_count() at the end of the section will
698 * return 1 if the section did in fact leak a temporary.
700 void tcg_clear_temp_count(void);
701 int tcg_check_temp_count(void);
703 #define tcg_clear_temp_count() do { } while (0)
704 #define tcg_check_temp_count() 0
707 void tcg_dump_info(FILE *f
, fprintf_function cpu_fprintf
);
708 void tcg_dump_op_count(FILE *f
, fprintf_function cpu_fprintf
);
710 #define TCG_CT_ALIAS 0x80
711 #define TCG_CT_IALIAS 0x40
712 #define TCG_CT_REG 0x01
713 #define TCG_CT_CONST 0x02 /* any constant of register size */
715 typedef struct TCGArgConstraint
{
723 #define TCG_MAX_OP_ARGS 16
725 /* Bits for TCGOpDef->flags, 8 bits available. */
727 /* Instruction defines the end of a basic block. */
728 TCG_OPF_BB_END
= 0x01,
729 /* Instruction clobbers call registers and potentially update globals. */
730 TCG_OPF_CALL_CLOBBER
= 0x02,
731 /* Instruction has side effects: it cannot be removed if its outputs
732 are not used, and might trigger exceptions. */
733 TCG_OPF_SIDE_EFFECTS
= 0x04,
734 /* Instruction operands are 64-bits (otherwise 32-bits). */
735 TCG_OPF_64BIT
= 0x08,
736 /* Instruction is optional and not implemented by the host, or insn
737 is generic and should not be implemened by the host. */
738 TCG_OPF_NOT_PRESENT
= 0x10,
741 typedef struct TCGOpDef
{
743 uint8_t nb_oargs
, nb_iargs
, nb_cargs
, nb_args
;
745 TCGArgConstraint
*args_ct
;
747 #if defined(CONFIG_DEBUG_TCG)
752 extern TCGOpDef tcg_op_defs
[];
753 extern const size_t tcg_op_defs_max
;
755 typedef struct TCGTargetOpDef
{
757 const char *args_ct_str
[TCG_MAX_OP_ARGS
];
760 #define tcg_abort() \
762 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
766 #ifdef CONFIG_DEBUG_TCG
767 # define tcg_debug_assert(X) do { assert(X); } while (0)
768 #elif QEMU_GNUC_PREREQ(4, 5)
769 # define tcg_debug_assert(X) \
770 do { if (!(X)) { __builtin_unreachable(); } } while (0)
772 # define tcg_debug_assert(X) do { (void)(X); } while (0)
775 void tcg_add_target_add_op_defs(const TCGTargetOpDef
*tdefs
);
777 #if UINTPTR_MAX == UINT32_MAX
778 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
779 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
781 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((intptr_t)(V)))
782 #define tcg_global_reg_new_ptr(R, N) \
783 TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
784 #define tcg_global_mem_new_ptr(R, O, N) \
785 TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
786 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
787 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
789 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
790 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
792 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((intptr_t)(V)))
793 #define tcg_global_reg_new_ptr(R, N) \
794 TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
795 #define tcg_global_mem_new_ptr(R, O, N) \
796 TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
797 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
798 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
801 void tcg_gen_callN(TCGContext
*s
, void *func
,
802 TCGArg ret
, int nargs
, TCGArg
*args
);
804 void tcg_op_remove(TCGContext
*s
, TCGOp
*op
);
805 void tcg_optimize(TCGContext
*s
);
807 /* only used for debugging purposes */
808 void tcg_dump_ops(TCGContext
*s
);
810 void dump_ops(const uint16_t *opc_buf
, const TCGArg
*opparam_buf
);
811 TCGv_i32
tcg_const_i32(int32_t val
);
812 TCGv_i64
tcg_const_i64(int64_t val
);
813 TCGv_i32
tcg_const_local_i32(int32_t val
);
814 TCGv_i64
tcg_const_local_i64(int64_t val
);
816 TCGLabel
*gen_new_label(void);
822 * Encode a label for storage in the TCG opcode stream.
825 static inline TCGArg
label_arg(TCGLabel
*l
)
834 * The opposite of label_arg. Retrieve a label from the
835 * encoding of the TCG opcode stream.
838 static inline TCGLabel
*arg_label(TCGArg i
)
840 return (TCGLabel
*)(uintptr_t)i
;
845 * @a, @b: addresses to be differenced
847 * There are many places within the TCG backends where we need a byte
848 * difference between two pointers. While this can be accomplished
849 * with local casting, it's easy to get wrong -- especially if one is
850 * concerned with the signedness of the result.
852 * This version relies on GCC's void pointer arithmetic to get the
856 static inline ptrdiff_t tcg_ptr_byte_diff(void *a
, void *b
)
863 * @s: the tcg context
864 * @target: address of the target
866 * Produce a pc-relative difference, from the current code_ptr
867 * to the destination address.
870 static inline ptrdiff_t tcg_pcrel_diff(TCGContext
*s
, void *target
)
872 return tcg_ptr_byte_diff(target
, s
->code_ptr
);
876 * tcg_current_code_size
877 * @s: the tcg context
879 * Compute the current code size within the translation block.
880 * This is used to fill in qemu's data structures for goto_tb.
883 static inline size_t tcg_current_code_size(TCGContext
*s
)
885 return tcg_ptr_byte_diff(s
->code_ptr
, s
->code_buf
);
888 /* Combine the TCGMemOp and mmu_idx parameters into a single value. */
889 typedef uint32_t TCGMemOpIdx
;
893 * @op: memory operation
896 * Encode these values into a single parameter.
898 static inline TCGMemOpIdx
make_memop_idx(TCGMemOp op
, unsigned idx
)
900 tcg_debug_assert(idx
<= 15);
901 return (op
<< 4) | idx
;
906 * @oi: combined op/idx parameter
908 * Extract the memory operation from the combined value.
910 static inline TCGMemOp
get_memop(TCGMemOpIdx oi
)
917 * @oi: combined op/idx parameter
919 * Extract the mmu index from the combined value.
921 static inline unsigned get_mmuidx(TCGMemOpIdx oi
)
928 * @env: pointer to CPUArchState for the CPU
929 * @tb_ptr: address of generated code for the TB to execute
931 * Start executing code from a given translation block.
932 * Where translation blocks have been linked, execution
933 * may proceed from the given TB into successive ones.
934 * Control eventually returns only when some action is needed
935 * from the top-level loop: either control must pass to a TB
936 * which has not yet been directly linked, or an asynchronous
937 * event such as an interrupt needs handling.
939 * Return: The return value is the value passed to the corresponding
940 * tcg_gen_exit_tb() at translation time of the last TB attempted to execute.
941 * The value is either zero or a 4-byte aligned pointer to that TB combined
942 * with additional information in its two least significant bits. The
943 * additional information is encoded as follows:
944 * 0, 1: the link between this TB and the next is via the specified
945 * TB index (0 or 1). That is, we left the TB via (the equivalent
946 * of) "goto_tb <index>". The main loop uses this to determine
947 * how to link the TB just executed to the next.
948 * 2: we are using instruction counting code generation, and we
949 * did not start executing this TB because the instruction counter
950 * would hit zero midway through it. In this case the pointer
951 * returned is the TB we were about to execute, and the caller must
952 * arrange to execute the remaining count of instructions.
953 * 3: we stopped because the CPU's exit_request flag was set
954 * (usually meaning that there is an interrupt that needs to be
955 * handled). The pointer returned is the TB we were about to execute
956 * when we noticed the pending exit request.
958 * If the bottom two bits indicate an exit-via-index then the CPU
959 * state is correctly synchronised and ready for execution of the next
960 * TB (and in particular the guest PC is the address to execute next).
961 * Otherwise, we gave up on execution of this TB before it started, and
962 * the caller must fix up the CPU state by calling the CPU's
963 * synchronize_from_tb() method with the TB pointer we return (falling
964 * back to calling the CPU's set_pc method with tb->pb if no
965 * synchronize_from_tb() method exists).
967 * Note that TCG targets may use a different definition of tcg_qemu_tb_exec
968 * to this default (which just calls the prologue.code emitted by
969 * tcg_target_qemu_prologue()).
971 #define TB_EXIT_MASK 3
972 #define TB_EXIT_IDX0 0
973 #define TB_EXIT_IDX1 1
974 #define TB_EXIT_ICOUNT_EXPIRED 2
975 #define TB_EXIT_REQUESTED 3
977 #ifdef HAVE_TCG_QEMU_TB_EXEC
978 uintptr_t tcg_qemu_tb_exec(CPUArchState
*env
, uint8_t *tb_ptr
);
980 # define tcg_qemu_tb_exec(env, tb_ptr) \
981 ((uintptr_t (*)(void *, void *))tcg_ctx.code_gen_prologue)(env, tb_ptr)
984 void tcg_register_jit(void *buf
, size_t buf_size
);
987 * Memory helpers that will be used by TCG generated code.
989 #ifdef CONFIG_SOFTMMU
990 /* Value zero-extended to tcg register size. */
991 tcg_target_ulong
helper_ret_ldub_mmu(CPUArchState
*env
, target_ulong addr
,
992 TCGMemOpIdx oi
, uintptr_t retaddr
);
993 tcg_target_ulong
helper_le_lduw_mmu(CPUArchState
*env
, target_ulong addr
,
994 TCGMemOpIdx oi
, uintptr_t retaddr
);
995 tcg_target_ulong
helper_le_ldul_mmu(CPUArchState
*env
, target_ulong addr
,
996 TCGMemOpIdx oi
, uintptr_t retaddr
);
997 uint64_t helper_le_ldq_mmu(CPUArchState
*env
, target_ulong addr
,
998 TCGMemOpIdx oi
, uintptr_t retaddr
);
999 tcg_target_ulong
helper_be_lduw_mmu(CPUArchState
*env
, target_ulong addr
,
1000 TCGMemOpIdx oi
, uintptr_t retaddr
);
1001 tcg_target_ulong
helper_be_ldul_mmu(CPUArchState
*env
, target_ulong addr
,
1002 TCGMemOpIdx oi
, uintptr_t retaddr
);
1003 uint64_t helper_be_ldq_mmu(CPUArchState
*env
, target_ulong addr
,
1004 TCGMemOpIdx oi
, uintptr_t retaddr
);
1006 /* Value sign-extended to tcg register size. */
1007 tcg_target_ulong
helper_ret_ldsb_mmu(CPUArchState
*env
, target_ulong addr
,
1008 TCGMemOpIdx oi
, uintptr_t retaddr
);
1009 tcg_target_ulong
helper_le_ldsw_mmu(CPUArchState
*env
, target_ulong addr
,
1010 TCGMemOpIdx oi
, uintptr_t retaddr
);
1011 tcg_target_ulong
helper_le_ldsl_mmu(CPUArchState
*env
, target_ulong addr
,
1012 TCGMemOpIdx oi
, uintptr_t retaddr
);
1013 tcg_target_ulong
helper_be_ldsw_mmu(CPUArchState
*env
, target_ulong addr
,
1014 TCGMemOpIdx oi
, uintptr_t retaddr
);
1015 tcg_target_ulong
helper_be_ldsl_mmu(CPUArchState
*env
, target_ulong addr
,
1016 TCGMemOpIdx oi
, uintptr_t retaddr
);
1018 void helper_ret_stb_mmu(CPUArchState
*env
, target_ulong addr
, uint8_t val
,
1019 TCGMemOpIdx oi
, uintptr_t retaddr
);
1020 void helper_le_stw_mmu(CPUArchState
*env
, target_ulong addr
, uint16_t val
,
1021 TCGMemOpIdx oi
, uintptr_t retaddr
);
1022 void helper_le_stl_mmu(CPUArchState
*env
, target_ulong addr
, uint32_t val
,
1023 TCGMemOpIdx oi
, uintptr_t retaddr
);
1024 void helper_le_stq_mmu(CPUArchState
*env
, target_ulong addr
, uint64_t val
,
1025 TCGMemOpIdx oi
, uintptr_t retaddr
);
1026 void helper_be_stw_mmu(CPUArchState
*env
, target_ulong addr
, uint16_t val
,
1027 TCGMemOpIdx oi
, uintptr_t retaddr
);
1028 void helper_be_stl_mmu(CPUArchState
*env
, target_ulong addr
, uint32_t val
,
1029 TCGMemOpIdx oi
, uintptr_t retaddr
);
1030 void helper_be_stq_mmu(CPUArchState
*env
, target_ulong addr
, uint64_t val
,
1031 TCGMemOpIdx oi
, uintptr_t retaddr
);
1033 uint8_t helper_ret_ldb_cmmu(CPUArchState
*env
, target_ulong addr
,
1034 TCGMemOpIdx oi
, uintptr_t retaddr
);
1035 uint16_t helper_le_ldw_cmmu(CPUArchState
*env
, target_ulong addr
,
1036 TCGMemOpIdx oi
, uintptr_t retaddr
);
1037 uint32_t helper_le_ldl_cmmu(CPUArchState
*env
, target_ulong addr
,
1038 TCGMemOpIdx oi
, uintptr_t retaddr
);
1039 uint64_t helper_le_ldq_cmmu(CPUArchState
*env
, target_ulong addr
,
1040 TCGMemOpIdx oi
, uintptr_t retaddr
);
1041 uint16_t helper_be_ldw_cmmu(CPUArchState
*env
, target_ulong addr
,
1042 TCGMemOpIdx oi
, uintptr_t retaddr
);
1043 uint32_t helper_be_ldl_cmmu(CPUArchState
*env
, target_ulong addr
,
1044 TCGMemOpIdx oi
, uintptr_t retaddr
);
1045 uint64_t helper_be_ldq_cmmu(CPUArchState
*env
, target_ulong addr
,
1046 TCGMemOpIdx oi
, uintptr_t retaddr
);
1048 /* Temporary aliases until backends are converted. */
1049 #ifdef TARGET_WORDS_BIGENDIAN
1050 # define helper_ret_ldsw_mmu helper_be_ldsw_mmu
1051 # define helper_ret_lduw_mmu helper_be_lduw_mmu
1052 # define helper_ret_ldsl_mmu helper_be_ldsl_mmu
1053 # define helper_ret_ldul_mmu helper_be_ldul_mmu
1054 # define helper_ret_ldl_mmu helper_be_ldul_mmu
1055 # define helper_ret_ldq_mmu helper_be_ldq_mmu
1056 # define helper_ret_stw_mmu helper_be_stw_mmu
1057 # define helper_ret_stl_mmu helper_be_stl_mmu
1058 # define helper_ret_stq_mmu helper_be_stq_mmu
1059 # define helper_ret_ldw_cmmu helper_be_ldw_cmmu
1060 # define helper_ret_ldl_cmmu helper_be_ldl_cmmu
1061 # define helper_ret_ldq_cmmu helper_be_ldq_cmmu
1063 # define helper_ret_ldsw_mmu helper_le_ldsw_mmu
1064 # define helper_ret_lduw_mmu helper_le_lduw_mmu
1065 # define helper_ret_ldsl_mmu helper_le_ldsl_mmu
1066 # define helper_ret_ldul_mmu helper_le_ldul_mmu
1067 # define helper_ret_ldl_mmu helper_le_ldul_mmu
1068 # define helper_ret_ldq_mmu helper_le_ldq_mmu
1069 # define helper_ret_stw_mmu helper_le_stw_mmu
1070 # define helper_ret_stl_mmu helper_le_stl_mmu
1071 # define helper_ret_stq_mmu helper_le_stq_mmu
1072 # define helper_ret_ldw_cmmu helper_le_ldw_cmmu
1073 # define helper_ret_ldl_cmmu helper_le_ldl_cmmu
1074 # define helper_ret_ldq_cmmu helper_le_ldq_cmmu
1077 #endif /* CONFIG_SOFTMMU */