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
198 /* when the size of the arguments of a called function is smaller than
199 this value, they are statically allocated in the TB stack frame */
200 #define TCG_STATIC_CALL_ARGS_SIZE 128
202 typedef enum TCGType {
205 TCG_TYPE_COUNT, /* number of different types */
207 /* An alias for the size of the host register. */
208 #if TCG_TARGET_REG_BITS == 32
209 TCG_TYPE_REG = TCG_TYPE_I32,
211 TCG_TYPE_REG = TCG_TYPE_I64,
214 /* An alias for the size of the native pointer. */
215 #if UINTPTR_MAX == UINT32_MAX
216 TCG_TYPE_PTR = TCG_TYPE_I32,
218 TCG_TYPE_PTR = TCG_TYPE_I64,
221 /* An alias for the size of the target "long", aka register. */
222 #if TARGET_LONG_BITS == 64
223 TCG_TYPE_TL = TCG_TYPE_I64,
225 TCG_TYPE_TL = TCG_TYPE_I32,
229 /* Constants for qemu_ld and qemu_st for the Memory Operation field. */
230 typedef enum TCGMemOp {
235 MO_SIZE = 3, /* Mask for the above. */
237 MO_SIGN = 4, /* Sign-extended, otherwise zero-extended. */
239 MO_BSWAP = 8, /* Host reverse endian. */
240 #ifdef HOST_WORDS_BIGENDIAN
247 #ifdef TARGET_WORDS_BIGENDIAN
253 /* MO_UNALN accesses are never checked for alignment.
254 MO_ALIGN accesses will result in a call to the CPU's
255 do_unaligned_access hook if the guest address is not aligned.
256 The default depends on whether the target CPU defines ALIGNED_ONLY. */
266 /* Combinations of the above, for ease of use. */
270 MO_SB = MO_SIGN | MO_8,
271 MO_SW = MO_SIGN | MO_16,
272 MO_SL = MO_SIGN | MO_32,
275 MO_LEUW = MO_LE | MO_UW,
276 MO_LEUL = MO_LE | MO_UL,
277 MO_LESW = MO_LE | MO_SW,
278 MO_LESL = MO_LE | MO_SL,
279 MO_LEQ = MO_LE | MO_Q,
281 MO_BEUW = MO_BE | MO_UW,
282 MO_BEUL = MO_BE | MO_UL,
283 MO_BESW = MO_BE | MO_SW,
284 MO_BESL = MO_BE | MO_SL,
285 MO_BEQ = MO_BE | MO_Q,
287 MO_TEUW = MO_TE | MO_UW,
288 MO_TEUL = MO_TE | MO_UL,
289 MO_TESW = MO_TE | MO_SW,
290 MO_TESL = MO_TE | MO_SL,
291 MO_TEQ = MO_TE | MO_Q,
293 MO_SSIZE = MO_SIZE | MO_SIGN,
296 typedef tcg_target_ulong TCGArg;
298 /* Define a type and accessor macros for variables. Using pointer types
299 is nice because it gives some level of type safely. Converting to and
300 from intptr_t rather than int reduces the number of sign-extension
301 instructions that get implied on 64-bit hosts. Users of tcg_gen_* don't
302 need to know about any of this, and should treat TCGv as an opaque type.
303 In addition we do typechecking for different types of variables. TCGv_i32
304 and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
305 are aliases for target_ulong and host pointer sized values respectively. */
307 typedef struct TCGv_i32_d *TCGv_i32;
308 typedef struct TCGv_i64_d *TCGv_i64;
309 typedef struct TCGv_ptr_d *TCGv_ptr;
311 static inline TCGv_i32 QEMU_ARTIFICIAL MAKE_TCGV_I32(intptr_t i)
316 static inline TCGv_i64 QEMU_ARTIFICIAL MAKE_TCGV_I64(intptr_t i)
321 static inline TCGv_ptr QEMU_ARTIFICIAL MAKE_TCGV_PTR(intptr_t i)
326 static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_I32(TCGv_i32 t)
331 static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_I64(TCGv_i64 t)
336 static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_PTR(TCGv_ptr t)
341 #if TCG_TARGET_REG_BITS == 32
342 #define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
343 #define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
346 #define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
347 #define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
348 #define TCGV_EQUAL_PTR(a, b) (GET_TCGV_PTR(a) == GET_TCGV_PTR(b))
350 /* Dummy definition to avoid compiler warnings. */
351 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
352 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
353 #define TCGV_UNUSED_PTR(x) x = MAKE_TCGV_PTR(-1)
355 #define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
356 #define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
357 #define TCGV_IS_UNUSED_PTR(x) (GET_TCGV_PTR(x) == -1)
360 /* Helper does not read globals (either directly or through an exception). It
361 implies TCG_CALL_NO_WRITE_GLOBALS. */
362 #define TCG_CALL_NO_READ_GLOBALS 0x0010
363 /* Helper does not write globals */
364 #define TCG_CALL_NO_WRITE_GLOBALS 0x0020
365 /* Helper can be safely suppressed if the return value is not used. */
366 #define TCG_CALL_NO_SIDE_EFFECTS 0x0040
368 /* convenience version of most used call flags */
369 #define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS
370 #define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS
371 #define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS
372 #define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
373 #define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
375 /* used to align parameters */
376 #define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
377 #define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
379 /* Conditions. Note that these are laid out for easy manipulation by
381 bit 0 is used for inverting;
384 bit 3 is used with bit 0 for swapping signed/unsigned. */
387 TCG_COND_NEVER = 0 | 0 | 0 | 0,
388 TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
389 TCG_COND_EQ = 8 | 0 | 0 | 0,
390 TCG_COND_NE = 8 | 0 | 0 | 1,
392 TCG_COND_LT = 0 | 0 | 2 | 0,
393 TCG_COND_GE = 0 | 0 | 2 | 1,
394 TCG_COND_LE = 8 | 0 | 2 | 0,
395 TCG_COND_GT = 8 | 0 | 2 | 1,
397 TCG_COND_LTU = 0 | 4 | 0 | 0,
398 TCG_COND_GEU = 0 | 4 | 0 | 1,
399 TCG_COND_LEU = 8 | 4 | 0 | 0,
400 TCG_COND_GTU = 8 | 4 | 0 | 1,
403 /* Invert the sense of the comparison. */
404 static inline TCGCond tcg_invert_cond(TCGCond c)
406 return (TCGCond)(c ^ 1);
409 /* Swap the operands in a comparison. */
410 static inline TCGCond tcg_swap_cond(TCGCond c)
412 return c & 6 ? (TCGCond)(c ^ 9) : c;
415 /* Create an "unsigned" version of a "signed" comparison. */
416 static inline TCGCond tcg_unsigned_cond(TCGCond c)
418 return c & 2 ? (TCGCond)(c ^ 6) : c;
421 /* Must a comparison be considered unsigned? */
422 static inline bool is_unsigned_cond(TCGCond c)
427 /* Create a "high" version of a double-word comparison.
428 This removes equality from a LTE or GTE comparison. */
429 static inline TCGCond tcg_high_cond(TCGCond c)
436 return (TCGCond)(c ^ 8);
442 typedef enum TCGTempVal {
449 typedef struct TCGTemp {
451 unsigned int mem_reg:8;
452 TCGTempVal val_type:8;
455 unsigned int fixed_reg:1;
456 unsigned int mem_coherent:1;
457 unsigned int mem_allocated:1;
458 unsigned int temp_local:1; /* If true, the temp is saved across
459 basic blocks. Otherwise, it is not
460 preserved across basic blocks. */
461 unsigned int temp_allocated:1; /* never used for code gen */
468 typedef struct TCGContext TCGContext;
470 typedef struct TCGTempSet {
471 unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)];
474 typedef struct TCGOp {
477 /* The number of out and in parameter for a call. */
481 /* Index of the arguments for this op, or -1 for zero-operand ops. */
484 /* Index of the prex/next op, or -1 for the end of the list. */
489 QEMU_BUILD_BUG_ON(NB_OPS > 0xff);
490 QEMU_BUILD_BUG_ON(OPC_BUF_SIZE >= 0x7fff);
491 QEMU_BUILD_BUG_ON(OPPARAM_BUF_SIZE >= 0x7fff);
494 uint8_t *pool_cur, *pool_end;
495 TCGPool *pool_first, *pool_current, *pool_first_large;
500 /* goto_tb support */
501 tcg_insn_unit *code_buf;
503 uint16_t *tb_next_offset;
504 uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
506 /* liveness analysis */
507 uint16_t *op_dead_args; /* for each operation, each bit tells if the
508 corresponding argument is dead */
509 uint8_t *op_sync_args; /* for each operation, each bit tells if the
510 corresponding output argument needs to be
513 TCGRegSet reserved_regs;
514 intptr_t current_frame_offset;
515 intptr_t frame_start;
519 tcg_insn_unit *code_ptr;
523 #ifdef CONFIG_PROFILER
527 int64_t op_count; /* total insn count */
528 int op_count_max; /* max insn per TB */
531 int64_t del_op_count;
533 int64_t code_out_len;
538 int64_t restore_count;
539 int64_t restore_time;
542 #ifdef CONFIG_DEBUG_TCG
544 int goto_tb_issue_mask;
547 int gen_first_op_idx;
550 int gen_next_parm_idx;
552 /* Code generation. Note that we specifically do not use tcg_insn_unit
553 here, because there's too much arithmetic throughout that relies
554 on addition and subtraction working on bytes. Rely on the GCC
555 extension that allows arithmetic on void*. */
556 int code_gen_max_blocks;
557 void *code_gen_prologue;
558 void *code_gen_buffer;
559 size_t code_gen_buffer_size;
560 /* threshold to flush the translated code buffer */
561 size_t code_gen_buffer_max_size;
566 /* The TCGBackendData structure is private to tcg-target.c. */
567 struct TCGBackendData *be;
569 TCGTempSet free_temps[TCG_TYPE_COUNT * 2];
570 TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
572 /* tells in which temporary a given register is. It does not take
573 into account fixed registers */
574 int reg_to_temp[TCG_TARGET_NB_REGS];
576 TCGOp gen_op_buf[OPC_BUF_SIZE];
577 TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
579 target_ulong gen_opc_pc[OPC_BUF_SIZE];
580 uint16_t gen_opc_icount[OPC_BUF_SIZE];
581 uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
584 extern TCGContext tcg_ctx;
586 /* The number of opcodes emitted so far. */
587 static inline int tcg_op_buf_count(void)
589 return tcg_ctx.gen_next_op_idx;
592 /* Test for whether to terminate the TB for using too many opcodes. */
593 static inline bool tcg_op_buf_full(void)
595 return tcg_op_buf_count() >= OPC_MAX_SIZE;
598 /* pool based memory allocation */
600 void *tcg_malloc_internal(TCGContext *s, int size);
601 void tcg_pool_reset(TCGContext *s);
602 void tcg_pool_delete(TCGContext *s);
605 void tb_unlock(void);
606 void tb_lock_reset(void);
608 static inline void *tcg_malloc(int size)
610 TCGContext *s = &tcg_ctx;
611 uint8_t *ptr, *ptr_end;
612 size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
614 ptr_end = ptr + size;
615 if (unlikely(ptr_end > s->pool_end)) {
616 return tcg_malloc_internal(&tcg_ctx, size);
618 s->pool_cur = ptr_end;
623 void tcg_context_init(TCGContext *s);
624 void tcg_prologue_init(TCGContext *s);
625 void tcg_func_start(TCGContext *s);
627 int tcg_gen_code(TCGContext *s, tcg_insn_unit *gen_code_buf);
628 int tcg_gen_code_search_pc(TCGContext *s, tcg_insn_unit *gen_code_buf,
631 void tcg_set_frame(TCGContext *s, int reg, intptr_t start, intptr_t size);
633 TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
634 TCGv_i32 tcg_global_mem_new_i32(int reg, intptr_t offset, const char *name);
635 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
636 static inline TCGv_i32 tcg_temp_new_i32(void)
638 return tcg_temp_new_internal_i32(0);
640 static inline TCGv_i32 tcg_temp_local_new_i32(void)
642 return tcg_temp_new_internal_i32(1);
644 void tcg_temp_free_i32(TCGv_i32 arg);
645 char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
647 TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
648 TCGv_i64 tcg_global_mem_new_i64(int reg, intptr_t offset, const char *name);
649 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
650 static inline TCGv_i64 tcg_temp_new_i64(void)
652 return tcg_temp_new_internal_i64(0);
654 static inline TCGv_i64 tcg_temp_local_new_i64(void)
656 return tcg_temp_new_internal_i64(1);
658 void tcg_temp_free_i64(TCGv_i64 arg);
659 char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
661 #if defined(CONFIG_DEBUG_TCG)
662 /* If you call tcg_clear_temp_count() at the start of a section of
663 * code which is not supposed to leak any TCG temporaries, then
664 * calling tcg_check_temp_count() at the end of the section will
665 * return 1 if the section did in fact leak a temporary.
667 void tcg_clear_temp_count(void);
668 int tcg_check_temp_count(void);
670 #define tcg_clear_temp_count() do { } while (0)
671 #define tcg_check_temp_count() 0
674 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
675 void tcg_dump_op_count(FILE *f, fprintf_function cpu_fprintf);
677 #define TCG_CT_ALIAS 0x80
678 #define TCG_CT_IALIAS 0x40
679 #define TCG_CT_REG 0x01
680 #define TCG_CT_CONST 0x02 /* any constant of register size */
682 typedef struct TCGArgConstraint {
690 #define TCG_MAX_OP_ARGS 16
692 /* Bits for TCGOpDef->flags, 8 bits available. */
694 /* Instruction defines the end of a basic block. */
695 TCG_OPF_BB_END = 0x01,
696 /* Instruction clobbers call registers and potentially update globals. */
697 TCG_OPF_CALL_CLOBBER = 0x02,
698 /* Instruction has side effects: it cannot be removed if its outputs
699 are not used, and might trigger exceptions. */
700 TCG_OPF_SIDE_EFFECTS = 0x04,
701 /* Instruction operands are 64-bits (otherwise 32-bits). */
702 TCG_OPF_64BIT = 0x08,
703 /* Instruction is optional and not implemented by the host, or insn
704 is generic and should not be implemened by the host. */
705 TCG_OPF_NOT_PRESENT = 0x10,
708 typedef struct TCGOpDef {
710 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
712 TCGArgConstraint *args_ct;
714 #if defined(CONFIG_DEBUG_TCG)
719 extern TCGOpDef tcg_op_defs[];
720 extern const size_t tcg_op_defs_max;
722 typedef struct TCGTargetOpDef {
724 const char *args_ct_str[TCG_MAX_OP_ARGS];
727 #define tcg_abort() \
729 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
733 #ifdef CONFIG_DEBUG_TCG
734 # define tcg_debug_assert(X) do { assert(X); } while (0)
735 #elif QEMU_GNUC_PREREQ(4, 5)
736 # define tcg_debug_assert(X) \
737 do { if (!(X)) { __builtin_unreachable(); } } while (0)
739 # define tcg_debug_assert(X) do { (void)(X); } while (0)
742 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
744 #if UINTPTR_MAX == UINT32_MAX
745 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
746 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
748 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((intptr_t)(V)))
749 #define tcg_global_reg_new_ptr(R, N) \
750 TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
751 #define tcg_global_mem_new_ptr(R, O, N) \
752 TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
753 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
754 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
756 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
757 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
759 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((intptr_t)(V)))
760 #define tcg_global_reg_new_ptr(R, N) \
761 TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
762 #define tcg_global_mem_new_ptr(R, O, N) \
763 TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
764 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
765 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
768 void tcg_gen_callN(TCGContext *s, void *func,
769 TCGArg ret, int nargs, TCGArg *args);
771 void tcg_op_remove(TCGContext *s, TCGOp *op);
772 void tcg_optimize(TCGContext *s);
774 /* only used for debugging purposes */
775 void tcg_dump_ops(TCGContext *s);
777 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
778 TCGv_i32 tcg_const_i32(int32_t val);
779 TCGv_i64 tcg_const_i64(int64_t val);
780 TCGv_i32 tcg_const_local_i32(int32_t val);
781 TCGv_i64 tcg_const_local_i64(int64_t val);
783 TCGLabel *gen_new_label(void);
789 * Encode a label for storage in the TCG opcode stream.
792 static inline TCGArg label_arg(TCGLabel *l)
801 * The opposite of label_arg. Retrieve a label from the
802 * encoding of the TCG opcode stream.
805 static inline TCGLabel *arg_label(TCGArg i)
807 return (TCGLabel *)(uintptr_t)i;
812 * @a, @b: addresses to be differenced
814 * There are many places within the TCG backends where we need a byte
815 * difference between two pointers. While this can be accomplished
816 * with local casting, it's easy to get wrong -- especially if one is
817 * concerned with the signedness of the result.
819 * This version relies on GCC's void pointer arithmetic to get the
823 static inline ptrdiff_t tcg_ptr_byte_diff(void *a, void *b)
830 * @s: the tcg context
831 * @target: address of the target
833 * Produce a pc-relative difference, from the current code_ptr
834 * to the destination address.
837 static inline ptrdiff_t tcg_pcrel_diff(TCGContext *s, void *target)
839 return tcg_ptr_byte_diff(target, s->code_ptr);
843 * tcg_current_code_size
844 * @s: the tcg context
846 * Compute the current code size within the translation block.
847 * This is used to fill in qemu's data structures for goto_tb.
850 static inline size_t tcg_current_code_size(TCGContext *s)
852 return tcg_ptr_byte_diff(s->code_ptr, s->code_buf);
855 /* Combine the TCGMemOp and mmu_idx parameters into a single value. */
856 typedef uint32_t TCGMemOpIdx;
860 * @op: memory operation
863 * Encode these values into a single parameter.
865 static inline TCGMemOpIdx make_memop_idx(TCGMemOp op, unsigned idx)
867 tcg_debug_assert(idx <= 15);
868 return (op << 4) | idx;
873 * @oi: combined op/idx parameter
875 * Extract the memory operation from the combined value.
877 static inline TCGMemOp get_memop(TCGMemOpIdx oi)
884 * @oi: combined op/idx parameter
886 * Extract the mmu index from the combined value.
888 static inline unsigned get_mmuidx(TCGMemOpIdx oi)
895 * @env: CPUArchState * for the CPU
896 * @tb_ptr: address of generated code for the TB to execute
898 * Start executing code from a given translation block.
899 * Where translation blocks have been linked, execution
900 * may proceed from the given TB into successive ones.
901 * Control eventually returns only when some action is needed
902 * from the top-level loop: either control must pass to a TB
903 * which has not yet been directly linked, or an asynchronous
904 * event such as an interrupt needs handling.
906 * The return value is a pointer to the next TB to execute
907 * (if known; otherwise zero). This pointer is assumed to be
908 * 4-aligned, and the bottom two bits are used to return further
910 * 0, 1: the link between this TB and the next is via the specified
911 * TB index (0 or 1). That is, we left the TB via (the equivalent
912 * of) "goto_tb <index>". The main loop uses this to determine
913 * how to link the TB just executed to the next.
914 * 2: we are using instruction counting code generation, and we
915 * did not start executing this TB because the instruction counter
916 * would hit zero midway through it. In this case the next-TB pointer
917 * returned is the TB we were about to execute, and the caller must
918 * arrange to execute the remaining count of instructions.
919 * 3: we stopped because the CPU's exit_request flag was set
920 * (usually meaning that there is an interrupt that needs to be
921 * handled). The next-TB pointer returned is the TB we were
922 * about to execute when we noticed the pending exit request.
924 * If the bottom two bits indicate an exit-via-index then the CPU
925 * state is correctly synchronised and ready for execution of the next
926 * TB (and in particular the guest PC is the address to execute next).
927 * Otherwise, we gave up on execution of this TB before it started, and
928 * the caller must fix up the CPU state by calling the CPU's
929 * synchronize_from_tb() method with the next-TB pointer we return (falling
930 * back to calling the CPU's set_pc method with tb->pb if no
931 * synchronize_from_tb() method exists).
933 * Note that TCG targets may use a different definition of tcg_qemu_tb_exec
934 * to this default (which just calls the prologue.code emitted by
935 * tcg_target_qemu_prologue()).
937 #define TB_EXIT_MASK 3
938 #define TB_EXIT_IDX0 0
939 #define TB_EXIT_IDX1 1
940 #define TB_EXIT_ICOUNT_EXPIRED 2
941 #define TB_EXIT_REQUESTED 3
943 #ifdef HAVE_TCG_QEMU_TB_EXEC
944 uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr);
946 # define tcg_qemu_tb_exec(env, tb_ptr) \
947 ((uintptr_t (*)(void *, void *))tcg_ctx.code_gen_prologue)(env, tb_ptr)
950 void tcg_register_jit(void *buf, size_t buf_size);
953 * Memory helpers that will be used by TCG generated code.
955 #ifdef CONFIG_SOFTMMU
956 /* Value zero-extended to tcg register size. */
957 tcg_target_ulong helper_ret_ldub_mmu(CPUArchState *env, target_ulong addr,
958 TCGMemOpIdx oi, uintptr_t retaddr);
959 tcg_target_ulong helper_le_lduw_mmu(CPUArchState *env, target_ulong addr,
960 TCGMemOpIdx oi, uintptr_t retaddr);
961 tcg_target_ulong helper_le_ldul_mmu(CPUArchState *env, target_ulong addr,
962 TCGMemOpIdx oi, uintptr_t retaddr);
963 uint64_t helper_le_ldq_mmu(CPUArchState *env, target_ulong addr,
964 TCGMemOpIdx oi, uintptr_t retaddr);
965 tcg_target_ulong helper_be_lduw_mmu(CPUArchState *env, target_ulong addr,
966 TCGMemOpIdx oi, uintptr_t retaddr);
967 tcg_target_ulong helper_be_ldul_mmu(CPUArchState *env, target_ulong addr,
968 TCGMemOpIdx oi, uintptr_t retaddr);
969 uint64_t helper_be_ldq_mmu(CPUArchState *env, target_ulong addr,
970 TCGMemOpIdx oi, uintptr_t retaddr);
972 /* Value sign-extended to tcg register size. */
973 tcg_target_ulong helper_ret_ldsb_mmu(CPUArchState *env, target_ulong addr,
974 TCGMemOpIdx oi, uintptr_t retaddr);
975 tcg_target_ulong helper_le_ldsw_mmu(CPUArchState *env, target_ulong addr,
976 TCGMemOpIdx oi, uintptr_t retaddr);
977 tcg_target_ulong helper_le_ldsl_mmu(CPUArchState *env, target_ulong addr,
978 TCGMemOpIdx oi, uintptr_t retaddr);
979 tcg_target_ulong helper_be_ldsw_mmu(CPUArchState *env, target_ulong addr,
980 TCGMemOpIdx oi, uintptr_t retaddr);
981 tcg_target_ulong helper_be_ldsl_mmu(CPUArchState *env, target_ulong addr,
982 TCGMemOpIdx oi, uintptr_t retaddr);
984 void helper_ret_stb_mmu(CPUArchState *env, target_ulong addr, uint8_t val,
985 TCGMemOpIdx oi, uintptr_t retaddr);
986 void helper_le_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
987 TCGMemOpIdx oi, uintptr_t retaddr);
988 void helper_le_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
989 TCGMemOpIdx oi, uintptr_t retaddr);
990 void helper_le_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
991 TCGMemOpIdx oi, uintptr_t retaddr);
992 void helper_be_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
993 TCGMemOpIdx oi, uintptr_t retaddr);
994 void helper_be_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
995 TCGMemOpIdx oi, uintptr_t retaddr);
996 void helper_be_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
997 TCGMemOpIdx oi, uintptr_t retaddr);
999 uint8_t helper_ret_ldb_cmmu(CPUArchState *env, target_ulong addr,
1000 TCGMemOpIdx oi, uintptr_t retaddr);
1001 uint16_t helper_le_ldw_cmmu(CPUArchState *env, target_ulong addr,
1002 TCGMemOpIdx oi, uintptr_t retaddr);
1003 uint32_t helper_le_ldl_cmmu(CPUArchState *env, target_ulong addr,
1004 TCGMemOpIdx oi, uintptr_t retaddr);
1005 uint64_t helper_le_ldq_cmmu(CPUArchState *env, target_ulong addr,
1006 TCGMemOpIdx oi, uintptr_t retaddr);
1007 uint16_t helper_be_ldw_cmmu(CPUArchState *env, target_ulong addr,
1008 TCGMemOpIdx oi, uintptr_t retaddr);
1009 uint32_t helper_be_ldl_cmmu(CPUArchState *env, target_ulong addr,
1010 TCGMemOpIdx oi, uintptr_t retaddr);
1011 uint64_t helper_be_ldq_cmmu(CPUArchState *env, target_ulong addr,
1012 TCGMemOpIdx oi, uintptr_t retaddr);
1014 /* Temporary aliases until backends are converted. */
1015 #ifdef TARGET_WORDS_BIGENDIAN
1016 # define helper_ret_ldsw_mmu helper_be_ldsw_mmu
1017 # define helper_ret_lduw_mmu helper_be_lduw_mmu
1018 # define helper_ret_ldsl_mmu helper_be_ldsl_mmu
1019 # define helper_ret_ldul_mmu helper_be_ldul_mmu
1020 # define helper_ret_ldl_mmu helper_be_ldul_mmu
1021 # define helper_ret_ldq_mmu helper_be_ldq_mmu
1022 # define helper_ret_stw_mmu helper_be_stw_mmu
1023 # define helper_ret_stl_mmu helper_be_stl_mmu
1024 # define helper_ret_stq_mmu helper_be_stq_mmu
1025 # define helper_ret_ldw_cmmu helper_be_ldw_cmmu
1026 # define helper_ret_ldl_cmmu helper_be_ldl_cmmu
1027 # define helper_ret_ldq_cmmu helper_be_ldq_cmmu
1029 # define helper_ret_ldsw_mmu helper_le_ldsw_mmu
1030 # define helper_ret_lduw_mmu helper_le_lduw_mmu
1031 # define helper_ret_ldsl_mmu helper_le_ldsl_mmu
1032 # define helper_ret_ldul_mmu helper_le_ldul_mmu
1033 # define helper_ret_ldl_mmu helper_le_ldul_mmu
1034 # define helper_ret_ldq_mmu helper_le_ldq_mmu
1035 # define helper_ret_stw_mmu helper_le_stw_mmu
1036 # define helper_ret_stl_mmu helper_le_stl_mmu
1037 # define helper_ret_stq_mmu helper_le_stq_mmu
1038 # define helper_ret_ldw_cmmu helper_le_ldw_cmmu
1039 # define helper_ret_ldl_cmmu helper_le_ldl_cmmu
1040 # define helper_ret_ldq_cmmu helper_le_ldq_cmmu
1043 #endif /* CONFIG_SOFTMMU */