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 /* Default target word size to pointer size. */
33 #ifndef TCG_TARGET_REG_BITS
34 # if UINTPTR_MAX == UINT32_MAX
35 # define TCG_TARGET_REG_BITS 32
36 # elif UINTPTR_MAX == UINT64_MAX
37 # define TCG_TARGET_REG_BITS 64
39 # error Unknown pointer size for tcg target
43 #if TCG_TARGET_REG_BITS == 32
44 typedef int32_t tcg_target_long;
45 typedef uint32_t tcg_target_ulong;
46 #define TCG_PRIlx PRIx32
47 #define TCG_PRIld PRId32
48 #elif TCG_TARGET_REG_BITS == 64
49 typedef int64_t tcg_target_long;
50 typedef uint64_t tcg_target_ulong;
51 #define TCG_PRIlx PRIx64
52 #define TCG_PRIld PRId64
57 #include "tcg-runtime.h"
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_trunc_shr_i32 0
70 #define TCG_TARGET_HAS_div_i64 0
71 #define TCG_TARGET_HAS_rem_i64 0
72 #define TCG_TARGET_HAS_div2_i64 0
73 #define TCG_TARGET_HAS_rot_i64 0
74 #define TCG_TARGET_HAS_ext8s_i64 0
75 #define TCG_TARGET_HAS_ext16s_i64 0
76 #define TCG_TARGET_HAS_ext32s_i64 0
77 #define TCG_TARGET_HAS_ext8u_i64 0
78 #define TCG_TARGET_HAS_ext16u_i64 0
79 #define TCG_TARGET_HAS_ext32u_i64 0
80 #define TCG_TARGET_HAS_bswap16_i64 0
81 #define TCG_TARGET_HAS_bswap32_i64 0
82 #define TCG_TARGET_HAS_bswap64_i64 0
83 #define TCG_TARGET_HAS_neg_i64 0
84 #define TCG_TARGET_HAS_not_i64 0
85 #define TCG_TARGET_HAS_andc_i64 0
86 #define TCG_TARGET_HAS_orc_i64 0
87 #define TCG_TARGET_HAS_eqv_i64 0
88 #define TCG_TARGET_HAS_nand_i64 0
89 #define TCG_TARGET_HAS_nor_i64 0
90 #define TCG_TARGET_HAS_deposit_i64 0
91 #define TCG_TARGET_HAS_movcond_i64 0
92 #define TCG_TARGET_HAS_add2_i64 0
93 #define TCG_TARGET_HAS_sub2_i64 0
94 #define TCG_TARGET_HAS_mulu2_i64 0
95 #define TCG_TARGET_HAS_muls2_i64 0
96 #define TCG_TARGET_HAS_muluh_i64 0
97 #define TCG_TARGET_HAS_mulsh_i64 0
98 /* Turn some undef macros into true macros. */
99 #define TCG_TARGET_HAS_add2_i32 1
100 #define TCG_TARGET_HAS_sub2_i32 1
103 #ifndef TCG_TARGET_deposit_i32_valid
104 #define TCG_TARGET_deposit_i32_valid(ofs, len) 1
106 #ifndef TCG_TARGET_deposit_i64_valid
107 #define TCG_TARGET_deposit_i64_valid(ofs, len) 1
110 /* Only one of DIV or DIV2 should be defined. */
111 #if defined(TCG_TARGET_HAS_div_i32)
112 #define TCG_TARGET_HAS_div2_i32 0
113 #elif defined(TCG_TARGET_HAS_div2_i32)
114 #define TCG_TARGET_HAS_div_i32 0
115 #define TCG_TARGET_HAS_rem_i32 0
117 #if defined(TCG_TARGET_HAS_div_i64)
118 #define TCG_TARGET_HAS_div2_i64 0
119 #elif defined(TCG_TARGET_HAS_div2_i64)
120 #define TCG_TARGET_HAS_div_i64 0
121 #define TCG_TARGET_HAS_rem_i64 0
124 /* For 32-bit targets, some sort of unsigned widening multiply is required. */
125 #if TCG_TARGET_REG_BITS == 32 \
126 && !(defined(TCG_TARGET_HAS_mulu2_i32) \
127 || defined(TCG_TARGET_HAS_muluh_i32))
128 # error "Missing unsigned widening multiply"
131 typedef enum TCGOpcode {
132 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
138 #define tcg_regset_clear(d) (d) = 0
139 #define tcg_regset_set(d, s) (d) = (s)
140 #define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
141 #define tcg_regset_set_reg(d, r) (d) |= 1L << (r)
142 #define tcg_regset_reset_reg(d, r) (d) &= ~(1L << (r))
143 #define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
144 #define tcg_regset_or(d, a, b) (d) = (a) | (b)
145 #define tcg_regset_and(d, a, b) (d) = (a) & (b)
146 #define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
147 #define tcg_regset_not(d, a) (d) = ~(a)
149 #ifndef TCG_TARGET_INSN_UNIT_SIZE
150 #define TCG_TARGET_INSN_UNIT_SIZE 1
152 #if TCG_TARGET_INSN_UNIT_SIZE == 1
153 typedef uint8_t tcg_insn_unit;
154 #elif TCG_TARGET_INSN_UNIT_SIZE == 2
155 typedef uint16_t tcg_insn_unit;
156 #elif TCG_TARGET_INSN_UNIT_SIZE == 4
157 typedef uint32_t tcg_insn_unit;
158 #elif TCG_TARGET_INSN_UNIT_SIZE == 8
159 typedef uint64_t tcg_insn_unit;
161 /* The port better have done this. */
165 typedef struct TCGRelocation {
166 struct TCGRelocation *next;
172 typedef struct TCGLabel {
176 tcg_insn_unit *value_ptr;
177 TCGRelocation *first_reloc;
181 typedef struct TCGPool {
182 struct TCGPool *next;
184 uint8_t data[0] __attribute__ ((aligned));
187 #define TCG_POOL_CHUNK_SIZE 32768
189 #define TCG_MAX_LABELS 512
191 #define TCG_MAX_TEMPS 512
193 /* when the size of the arguments of a called function is smaller than
194 this value, they are statically allocated in the TB stack frame */
195 #define TCG_STATIC_CALL_ARGS_SIZE 128
197 typedef enum TCGType {
200 TCG_TYPE_COUNT, /* number of different types */
202 /* An alias for the size of the host register. */
203 #if TCG_TARGET_REG_BITS == 32
204 TCG_TYPE_REG = TCG_TYPE_I32,
206 TCG_TYPE_REG = TCG_TYPE_I64,
209 /* An alias for the size of the native pointer. */
210 #if UINTPTR_MAX == UINT32_MAX
211 TCG_TYPE_PTR = TCG_TYPE_I32,
213 TCG_TYPE_PTR = TCG_TYPE_I64,
216 /* An alias for the size of the target "long", aka register. */
217 #if TARGET_LONG_BITS == 64
218 TCG_TYPE_TL = TCG_TYPE_I64,
220 TCG_TYPE_TL = TCG_TYPE_I32,
224 /* Constants for qemu_ld and qemu_st for the Memory Operation field. */
225 typedef enum TCGMemOp {
230 MO_SIZE = 3, /* Mask for the above. */
232 MO_SIGN = 4, /* Sign-extended, otherwise zero-extended. */
234 MO_BSWAP = 8, /* Host reverse endian. */
235 #ifdef HOST_WORDS_BIGENDIAN
242 #ifdef TARGET_WORDS_BIGENDIAN
248 /* Combinations of the above, for ease of use. */
252 MO_SB = MO_SIGN | MO_8,
253 MO_SW = MO_SIGN | MO_16,
254 MO_SL = MO_SIGN | MO_32,
257 MO_LEUW = MO_LE | MO_UW,
258 MO_LEUL = MO_LE | MO_UL,
259 MO_LESW = MO_LE | MO_SW,
260 MO_LESL = MO_LE | MO_SL,
261 MO_LEQ = MO_LE | MO_Q,
263 MO_BEUW = MO_BE | MO_UW,
264 MO_BEUL = MO_BE | MO_UL,
265 MO_BESW = MO_BE | MO_SW,
266 MO_BESL = MO_BE | MO_SL,
267 MO_BEQ = MO_BE | MO_Q,
269 MO_TEUW = MO_TE | MO_UW,
270 MO_TEUL = MO_TE | MO_UL,
271 MO_TESW = MO_TE | MO_SW,
272 MO_TESL = MO_TE | MO_SL,
273 MO_TEQ = MO_TE | MO_Q,
275 MO_SSIZE = MO_SIZE | MO_SIGN,
278 typedef tcg_target_ulong TCGArg;
280 /* Define a type and accessor macros for variables. Using a struct is
281 nice because it gives some level of type safely. Ideally the compiler
282 be able to see through all this. However in practice this is not true,
283 especially on targets with braindamaged ABIs (e.g. i386).
284 We use plain int by default to avoid this runtime overhead.
285 Users of tcg_gen_* don't need to know about any of this, and should
286 treat TCGv as an opaque type.
287 In addition we do typechecking for different types of variables. TCGv_i32
288 and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
289 are aliases for target_ulong and host pointer sized values respectively.
292 #ifdef CONFIG_DEBUG_TCG
312 #define MAKE_TCGV_I32(i) __extension__ \
313 ({ TCGv_i32 make_tcgv_tmp = {i}; make_tcgv_tmp;})
314 #define MAKE_TCGV_I64(i) __extension__ \
315 ({ TCGv_i64 make_tcgv_tmp = {i}; make_tcgv_tmp;})
316 #define MAKE_TCGV_PTR(i) __extension__ \
317 ({ TCGv_ptr make_tcgv_tmp = {i}; make_tcgv_tmp; })
318 #define GET_TCGV_I32(t) ((t).i32)
319 #define GET_TCGV_I64(t) ((t).i64)
320 #define GET_TCGV_PTR(t) ((t).iptr)
321 #if TCG_TARGET_REG_BITS == 32
322 #define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
323 #define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
326 #else /* !DEBUG_TCGV */
328 typedef int TCGv_i32;
329 typedef int TCGv_i64;
330 #if TCG_TARGET_REG_BITS == 32
331 #define TCGv_ptr TCGv_i32
333 #define TCGv_ptr TCGv_i64
335 #define MAKE_TCGV_I32(x) (x)
336 #define MAKE_TCGV_I64(x) (x)
337 #define MAKE_TCGV_PTR(x) (x)
338 #define GET_TCGV_I32(t) (t)
339 #define GET_TCGV_I64(t) (t)
340 #define GET_TCGV_PTR(t) (t)
342 #if TCG_TARGET_REG_BITS == 32
343 #define TCGV_LOW(t) (t)
344 #define TCGV_HIGH(t) ((t) + 1)
347 #endif /* DEBUG_TCGV */
349 #define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
350 #define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
351 #define TCGV_EQUAL_PTR(a, b) (GET_TCGV_PTR(a) == GET_TCGV_PTR(b))
353 /* Dummy definition to avoid compiler warnings. */
354 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
355 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
356 #define TCGV_UNUSED_PTR(x) x = MAKE_TCGV_PTR(-1)
358 #define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
359 #define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
360 #define TCGV_IS_UNUSED_PTR(x) (GET_TCGV_PTR(x) == -1)
363 /* Helper does not read globals (either directly or through an exception). It
364 implies TCG_CALL_NO_WRITE_GLOBALS. */
365 #define TCG_CALL_NO_READ_GLOBALS 0x0010
366 /* Helper does not write globals */
367 #define TCG_CALL_NO_WRITE_GLOBALS 0x0020
368 /* Helper can be safely suppressed if the return value is not used. */
369 #define TCG_CALL_NO_SIDE_EFFECTS 0x0040
371 /* convenience version of most used call flags */
372 #define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS
373 #define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS
374 #define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS
375 #define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
376 #define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
378 /* used to align parameters */
379 #define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
380 #define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
382 /* Conditions. Note that these are laid out for easy manipulation by
384 bit 0 is used for inverting;
387 bit 3 is used with bit 0 for swapping signed/unsigned. */
390 TCG_COND_NEVER = 0 | 0 | 0 | 0,
391 TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
392 TCG_COND_EQ = 8 | 0 | 0 | 0,
393 TCG_COND_NE = 8 | 0 | 0 | 1,
395 TCG_COND_LT = 0 | 0 | 2 | 0,
396 TCG_COND_GE = 0 | 0 | 2 | 1,
397 TCG_COND_LE = 8 | 0 | 2 | 0,
398 TCG_COND_GT = 8 | 0 | 2 | 1,
400 TCG_COND_LTU = 0 | 4 | 0 | 0,
401 TCG_COND_GEU = 0 | 4 | 0 | 1,
402 TCG_COND_LEU = 8 | 4 | 0 | 0,
403 TCG_COND_GTU = 8 | 4 | 0 | 1,
406 /* Invert the sense of the comparison. */
407 static inline TCGCond tcg_invert_cond(TCGCond c)
409 return (TCGCond)(c ^ 1);
412 /* Swap the operands in a comparison. */
413 static inline TCGCond tcg_swap_cond(TCGCond c)
415 return c & 6 ? (TCGCond)(c ^ 9) : c;
418 /* Create an "unsigned" version of a "signed" comparison. */
419 static inline TCGCond tcg_unsigned_cond(TCGCond c)
421 return c & 2 ? (TCGCond)(c ^ 6) : c;
424 /* Must a comparison be considered unsigned? */
425 static inline bool is_unsigned_cond(TCGCond c)
430 /* Create a "high" version of a double-word comparison.
431 This removes equality from a LTE or GTE comparison. */
432 static inline TCGCond tcg_high_cond(TCGCond c)
439 return (TCGCond)(c ^ 8);
445 #define TEMP_VAL_DEAD 0
446 #define TEMP_VAL_REG 1
447 #define TEMP_VAL_MEM 2
448 #define TEMP_VAL_CONST 3
450 /* XXX: optimize memory layout */
451 typedef struct TCGTemp {
459 unsigned int fixed_reg:1;
460 unsigned int mem_coherent:1;
461 unsigned int mem_allocated:1;
462 unsigned int temp_local:1; /* If true, the temp is saved across
463 basic blocks. Otherwise, it is not
464 preserved across basic blocks. */
465 unsigned int temp_allocated:1; /* never used for code gen */
469 typedef struct TCGContext TCGContext;
471 typedef struct TCGTempSet {
472 unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)];
476 uint8_t *pool_cur, *pool_end;
477 TCGPool *pool_first, *pool_current, *pool_first_large;
483 /* goto_tb support */
484 tcg_insn_unit *code_buf;
486 uint16_t *tb_next_offset;
487 uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
489 /* liveness analysis */
490 uint16_t *op_dead_args; /* for each operation, each bit tells if the
491 corresponding argument is dead */
492 uint8_t *op_sync_args; /* for each operation, each bit tells if the
493 corresponding output argument needs to be
496 /* tells in which temporary a given register is. It does not take
497 into account fixed registers */
498 int reg_to_temp[TCG_TARGET_NB_REGS];
499 TCGRegSet reserved_regs;
500 intptr_t current_frame_offset;
501 intptr_t frame_start;
505 tcg_insn_unit *code_ptr;
506 TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
507 TCGTempSet free_temps[TCG_TYPE_COUNT * 2];
511 #ifdef CONFIG_PROFILER
515 int64_t op_count; /* total insn count */
516 int op_count_max; /* max insn per TB */
519 int64_t del_op_count;
521 int64_t code_out_len;
526 int64_t restore_count;
527 int64_t restore_time;
530 #ifdef CONFIG_DEBUG_TCG
532 int goto_tb_issue_mask;
535 uint16_t gen_opc_buf[OPC_BUF_SIZE];
536 TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
538 uint16_t *gen_opc_ptr;
539 TCGArg *gen_opparam_ptr;
540 target_ulong gen_opc_pc[OPC_BUF_SIZE];
541 uint16_t gen_opc_icount[OPC_BUF_SIZE];
542 uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
544 /* Code generation. Note that we specifically do not use tcg_insn_unit
545 here, because there's too much arithmetic throughout that relies
546 on addition and subtraction working on bytes. Rely on the GCC
547 extension that allows arithmetic on void*. */
548 int code_gen_max_blocks;
549 void *code_gen_prologue;
550 void *code_gen_buffer;
551 size_t code_gen_buffer_size;
552 /* threshold to flush the translated code buffer */
553 size_t code_gen_buffer_max_size;
558 /* The TCGBackendData structure is private to tcg-target.c. */
559 struct TCGBackendData *be;
562 extern TCGContext tcg_ctx;
564 /* pool based memory allocation */
566 void *tcg_malloc_internal(TCGContext *s, int size);
567 void tcg_pool_reset(TCGContext *s);
568 void tcg_pool_delete(TCGContext *s);
570 static inline void *tcg_malloc(int size)
572 TCGContext *s = &tcg_ctx;
573 uint8_t *ptr, *ptr_end;
574 size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
576 ptr_end = ptr + size;
577 if (unlikely(ptr_end > s->pool_end)) {
578 return tcg_malloc_internal(&tcg_ctx, size);
580 s->pool_cur = ptr_end;
585 void tcg_context_init(TCGContext *s);
586 void tcg_prologue_init(TCGContext *s);
587 void tcg_func_start(TCGContext *s);
589 int tcg_gen_code(TCGContext *s, tcg_insn_unit *gen_code_buf);
590 int tcg_gen_code_search_pc(TCGContext *s, tcg_insn_unit *gen_code_buf,
593 void tcg_set_frame(TCGContext *s, int reg, intptr_t start, intptr_t size);
595 TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
596 TCGv_i32 tcg_global_mem_new_i32(int reg, intptr_t offset, const char *name);
597 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
598 static inline TCGv_i32 tcg_temp_new_i32(void)
600 return tcg_temp_new_internal_i32(0);
602 static inline TCGv_i32 tcg_temp_local_new_i32(void)
604 return tcg_temp_new_internal_i32(1);
606 void tcg_temp_free_i32(TCGv_i32 arg);
607 char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
609 TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
610 TCGv_i64 tcg_global_mem_new_i64(int reg, intptr_t offset, const char *name);
611 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
612 static inline TCGv_i64 tcg_temp_new_i64(void)
614 return tcg_temp_new_internal_i64(0);
616 static inline TCGv_i64 tcg_temp_local_new_i64(void)
618 return tcg_temp_new_internal_i64(1);
620 void tcg_temp_free_i64(TCGv_i64 arg);
621 char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
623 #if defined(CONFIG_DEBUG_TCG)
624 /* If you call tcg_clear_temp_count() at the start of a section of
625 * code which is not supposed to leak any TCG temporaries, then
626 * calling tcg_check_temp_count() at the end of the section will
627 * return 1 if the section did in fact leak a temporary.
629 void tcg_clear_temp_count(void);
630 int tcg_check_temp_count(void);
632 #define tcg_clear_temp_count() do { } while (0)
633 #define tcg_check_temp_count() 0
636 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
638 #define TCG_CT_ALIAS 0x80
639 #define TCG_CT_IALIAS 0x40
640 #define TCG_CT_REG 0x01
641 #define TCG_CT_CONST 0x02 /* any constant of register size */
643 typedef struct TCGArgConstraint {
651 #define TCG_MAX_OP_ARGS 16
653 /* Bits for TCGOpDef->flags, 8 bits available. */
655 /* Instruction defines the end of a basic block. */
656 TCG_OPF_BB_END = 0x01,
657 /* Instruction clobbers call registers and potentially update globals. */
658 TCG_OPF_CALL_CLOBBER = 0x02,
659 /* Instruction has side effects: it cannot be removed if its outputs
660 are not used, and might trigger exceptions. */
661 TCG_OPF_SIDE_EFFECTS = 0x04,
662 /* Instruction operands are 64-bits (otherwise 32-bits). */
663 TCG_OPF_64BIT = 0x08,
664 /* Instruction is optional and not implemented by the host, or insn
665 is generic and should not be implemened by the host. */
666 TCG_OPF_NOT_PRESENT = 0x10,
669 typedef struct TCGOpDef {
671 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
673 TCGArgConstraint *args_ct;
675 #if defined(CONFIG_DEBUG_TCG)
680 extern TCGOpDef tcg_op_defs[];
681 extern const size_t tcg_op_defs_max;
683 typedef struct TCGTargetOpDef {
685 const char *args_ct_str[TCG_MAX_OP_ARGS];
688 #define tcg_abort() \
690 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
694 #ifdef CONFIG_DEBUG_TCG
695 # define tcg_debug_assert(X) do { assert(X); } while (0)
696 #elif QEMU_GNUC_PREREQ(4, 5)
697 # define tcg_debug_assert(X) \
698 do { if (!(X)) { __builtin_unreachable(); } } while (0)
700 # define tcg_debug_assert(X) do { (void)(X); } while (0)
703 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
705 #if UINTPTR_MAX == UINT32_MAX
706 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
707 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
709 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((intptr_t)(V)))
710 #define tcg_global_reg_new_ptr(R, N) \
711 TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
712 #define tcg_global_mem_new_ptr(R, O, N) \
713 TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
714 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
715 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
717 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
718 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
720 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((intptr_t)(V)))
721 #define tcg_global_reg_new_ptr(R, N) \
722 TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
723 #define tcg_global_mem_new_ptr(R, O, N) \
724 TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
725 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
726 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
729 void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
730 int sizemask, TCGArg ret, int nargs, TCGArg *args);
732 void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
733 int c, int right, int arith);
735 TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr, TCGArg *args,
736 TCGOpDef *tcg_op_def);
738 /* only used for debugging purposes */
739 void tcg_dump_ops(TCGContext *s);
741 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
742 TCGv_i32 tcg_const_i32(int32_t val);
743 TCGv_i64 tcg_const_i64(int64_t val);
744 TCGv_i32 tcg_const_local_i32(int32_t val);
745 TCGv_i64 tcg_const_local_i64(int64_t val);
749 * @a, @b: addresses to be differenced
751 * There are many places within the TCG backends where we need a byte
752 * difference between two pointers. While this can be accomplished
753 * with local casting, it's easy to get wrong -- especially if one is
754 * concerned with the signedness of the result.
756 * This version relies on GCC's void pointer arithmetic to get the
760 static inline ptrdiff_t tcg_ptr_byte_diff(void *a, void *b)
767 * @s: the tcg context
768 * @target: address of the target
770 * Produce a pc-relative difference, from the current code_ptr
771 * to the destination address.
774 static inline ptrdiff_t tcg_pcrel_diff(TCGContext *s, void *target)
776 return tcg_ptr_byte_diff(target, s->code_ptr);
780 * tcg_current_code_size
781 * @s: the tcg context
783 * Compute the current code size within the translation block.
784 * This is used to fill in qemu's data structures for goto_tb.
787 static inline size_t tcg_current_code_size(TCGContext *s)
789 return tcg_ptr_byte_diff(s->code_ptr, s->code_buf);
794 * @env: CPUArchState * for the CPU
795 * @tb_ptr: address of generated code for the TB to execute
797 * Start executing code from a given translation block.
798 * Where translation blocks have been linked, execution
799 * may proceed from the given TB into successive ones.
800 * Control eventually returns only when some action is needed
801 * from the top-level loop: either control must pass to a TB
802 * which has not yet been directly linked, or an asynchronous
803 * event such as an interrupt needs handling.
805 * The return value is a pointer to the next TB to execute
806 * (if known; otherwise zero). This pointer is assumed to be
807 * 4-aligned, and the bottom two bits are used to return further
809 * 0, 1: the link between this TB and the next is via the specified
810 * TB index (0 or 1). That is, we left the TB via (the equivalent
811 * of) "goto_tb <index>". The main loop uses this to determine
812 * how to link the TB just executed to the next.
813 * 2: we are using instruction counting code generation, and we
814 * did not start executing this TB because the instruction counter
815 * would hit zero midway through it. In this case the next-TB pointer
816 * returned is the TB we were about to execute, and the caller must
817 * arrange to execute the remaining count of instructions.
818 * 3: we stopped because the CPU's exit_request flag was set
819 * (usually meaning that there is an interrupt that needs to be
820 * handled). The next-TB pointer returned is the TB we were
821 * about to execute when we noticed the pending exit request.
823 * If the bottom two bits indicate an exit-via-index then the CPU
824 * state is correctly synchronised and ready for execution of the next
825 * TB (and in particular the guest PC is the address to execute next).
826 * Otherwise, we gave up on execution of this TB before it started, and
827 * the caller must fix up the CPU state by calling cpu_pc_from_tb()
828 * with the next-TB pointer we return.
830 * Note that TCG targets may use a different definition of tcg_qemu_tb_exec
831 * to this default (which just calls the prologue.code emitted by
832 * tcg_target_qemu_prologue()).
834 #define TB_EXIT_MASK 3
835 #define TB_EXIT_IDX0 0
836 #define TB_EXIT_IDX1 1
837 #define TB_EXIT_ICOUNT_EXPIRED 2
838 #define TB_EXIT_REQUESTED 3
840 #if !defined(tcg_qemu_tb_exec)
841 # define tcg_qemu_tb_exec(env, tb_ptr) \
842 ((uintptr_t (*)(void *, void *))tcg_ctx.code_gen_prologue)(env, tb_ptr)
845 void tcg_register_jit(void *buf, size_t buf_size);
848 * Memory helpers that will be used by TCG generated code.
850 #ifdef CONFIG_SOFTMMU
851 /* Value zero-extended to tcg register size. */
852 tcg_target_ulong helper_ret_ldub_mmu(CPUArchState *env, target_ulong addr,
853 int mmu_idx, uintptr_t retaddr);
854 tcg_target_ulong helper_le_lduw_mmu(CPUArchState *env, target_ulong addr,
855 int mmu_idx, uintptr_t retaddr);
856 tcg_target_ulong helper_le_ldul_mmu(CPUArchState *env, target_ulong addr,
857 int mmu_idx, uintptr_t retaddr);
858 uint64_t helper_le_ldq_mmu(CPUArchState *env, target_ulong addr,
859 int mmu_idx, uintptr_t retaddr);
860 tcg_target_ulong helper_be_lduw_mmu(CPUArchState *env, target_ulong addr,
861 int mmu_idx, uintptr_t retaddr);
862 tcg_target_ulong helper_be_ldul_mmu(CPUArchState *env, target_ulong addr,
863 int mmu_idx, uintptr_t retaddr);
864 uint64_t helper_be_ldq_mmu(CPUArchState *env, target_ulong addr,
865 int mmu_idx, uintptr_t retaddr);
867 /* Value sign-extended to tcg register size. */
868 tcg_target_ulong helper_ret_ldsb_mmu(CPUArchState *env, target_ulong addr,
869 int mmu_idx, uintptr_t retaddr);
870 tcg_target_ulong helper_le_ldsw_mmu(CPUArchState *env, target_ulong addr,
871 int mmu_idx, uintptr_t retaddr);
872 tcg_target_ulong helper_le_ldsl_mmu(CPUArchState *env, target_ulong addr,
873 int mmu_idx, uintptr_t retaddr);
874 tcg_target_ulong helper_be_ldsw_mmu(CPUArchState *env, target_ulong addr,
875 int mmu_idx, uintptr_t retaddr);
876 tcg_target_ulong helper_be_ldsl_mmu(CPUArchState *env, target_ulong addr,
877 int mmu_idx, uintptr_t retaddr);
879 void helper_ret_stb_mmu(CPUArchState *env, target_ulong addr, uint8_t val,
880 int mmu_idx, uintptr_t retaddr);
881 void helper_le_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
882 int mmu_idx, uintptr_t retaddr);
883 void helper_le_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
884 int mmu_idx, uintptr_t retaddr);
885 void helper_le_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
886 int mmu_idx, uintptr_t retaddr);
887 void helper_be_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
888 int mmu_idx, uintptr_t retaddr);
889 void helper_be_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
890 int mmu_idx, uintptr_t retaddr);
891 void helper_be_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
892 int mmu_idx, uintptr_t retaddr);
894 /* Temporary aliases until backends are converted. */
895 #ifdef TARGET_WORDS_BIGENDIAN
896 # define helper_ret_ldsw_mmu helper_be_ldsw_mmu
897 # define helper_ret_lduw_mmu helper_be_lduw_mmu
898 # define helper_ret_ldsl_mmu helper_be_ldsl_mmu
899 # define helper_ret_ldul_mmu helper_be_ldul_mmu
900 # define helper_ret_ldq_mmu helper_be_ldq_mmu
901 # define helper_ret_stw_mmu helper_be_stw_mmu
902 # define helper_ret_stl_mmu helper_be_stl_mmu
903 # define helper_ret_stq_mmu helper_be_stq_mmu
905 # define helper_ret_ldsw_mmu helper_le_ldsw_mmu
906 # define helper_ret_lduw_mmu helper_le_lduw_mmu
907 # define helper_ret_ldsl_mmu helper_le_ldsl_mmu
908 # define helper_ret_ldul_mmu helper_le_ldul_mmu
909 # define helper_ret_ldq_mmu helper_le_ldq_mmu
910 # define helper_ret_stw_mmu helper_le_stw_mmu
911 # define helper_ret_stl_mmu helper_le_stl_mmu
912 # define helper_ret_stq_mmu helper_le_stq_mmu
915 uint8_t helper_ldb_mmu(CPUArchState *env, target_ulong addr, int mmu_idx);
916 uint16_t helper_ldw_mmu(CPUArchState *env, target_ulong addr, int mmu_idx);
917 uint32_t helper_ldl_mmu(CPUArchState *env, target_ulong addr, int mmu_idx);
918 uint64_t helper_ldq_mmu(CPUArchState *env, target_ulong addr, int mmu_idx);
920 void helper_stb_mmu(CPUArchState *env, target_ulong addr,
921 uint8_t val, int mmu_idx);
922 void helper_stw_mmu(CPUArchState *env, target_ulong addr,
923 uint16_t val, int mmu_idx);
924 void helper_stl_mmu(CPUArchState *env, target_ulong addr,
925 uint32_t val, int mmu_idx);
926 void helper_stq_mmu(CPUArchState *env, target_ulong addr,
927 uint64_t val, int mmu_idx);
928 #endif /* CONFIG_SOFTMMU */