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"
30 #include "qemu/bitops.h"
31 #include "tcg-target.h"
33 #define CPU_TEMP_BUF_NLONGS 128
35 /* Default target word size to pointer size. */
36 #ifndef TCG_TARGET_REG_BITS
37 # if UINTPTR_MAX == UINT32_MAX
38 # define TCG_TARGET_REG_BITS 32
39 # elif UINTPTR_MAX == UINT64_MAX
40 # define TCG_TARGET_REG_BITS 64
42 # error Unknown pointer size for tcg target
46 #if TCG_TARGET_REG_BITS == 32
47 typedef int32_t tcg_target_long;
48 typedef uint32_t tcg_target_ulong;
49 #define TCG_PRIlx PRIx32
50 #define TCG_PRIld PRId32
51 #elif TCG_TARGET_REG_BITS == 64
52 typedef int64_t tcg_target_long;
53 typedef uint64_t tcg_target_ulong;
54 #define TCG_PRIlx PRIx64
55 #define TCG_PRIld PRId64
60 #if TCG_TARGET_NB_REGS <= 32
61 typedef uint32_t TCGRegSet;
62 #elif TCG_TARGET_NB_REGS <= 64
63 typedef uint64_t TCGRegSet;
68 #if TCG_TARGET_REG_BITS == 32
69 /* Turn some undef macros into false macros. */
70 #define TCG_TARGET_HAS_extrl_i64_i32 0
71 #define TCG_TARGET_HAS_extrh_i64_i32 0
72 #define TCG_TARGET_HAS_div_i64 0
73 #define TCG_TARGET_HAS_rem_i64 0
74 #define TCG_TARGET_HAS_div2_i64 0
75 #define TCG_TARGET_HAS_rot_i64 0
76 #define TCG_TARGET_HAS_ext8s_i64 0
77 #define TCG_TARGET_HAS_ext16s_i64 0
78 #define TCG_TARGET_HAS_ext32s_i64 0
79 #define TCG_TARGET_HAS_ext8u_i64 0
80 #define TCG_TARGET_HAS_ext16u_i64 0
81 #define TCG_TARGET_HAS_ext32u_i64 0
82 #define TCG_TARGET_HAS_bswap16_i64 0
83 #define TCG_TARGET_HAS_bswap32_i64 0
84 #define TCG_TARGET_HAS_bswap64_i64 0
85 #define TCG_TARGET_HAS_neg_i64 0
86 #define TCG_TARGET_HAS_not_i64 0
87 #define TCG_TARGET_HAS_andc_i64 0
88 #define TCG_TARGET_HAS_orc_i64 0
89 #define TCG_TARGET_HAS_eqv_i64 0
90 #define TCG_TARGET_HAS_nand_i64 0
91 #define TCG_TARGET_HAS_nor_i64 0
92 #define TCG_TARGET_HAS_deposit_i64 0
93 #define TCG_TARGET_HAS_movcond_i64 0
94 #define TCG_TARGET_HAS_add2_i64 0
95 #define TCG_TARGET_HAS_sub2_i64 0
96 #define TCG_TARGET_HAS_mulu2_i64 0
97 #define TCG_TARGET_HAS_muls2_i64 0
98 #define TCG_TARGET_HAS_muluh_i64 0
99 #define TCG_TARGET_HAS_mulsh_i64 0
100 /* Turn some undef macros into true macros. */
101 #define TCG_TARGET_HAS_add2_i32 1
102 #define TCG_TARGET_HAS_sub2_i32 1
105 #ifndef TCG_TARGET_deposit_i32_valid
106 #define TCG_TARGET_deposit_i32_valid(ofs, len) 1
108 #ifndef TCG_TARGET_deposit_i64_valid
109 #define TCG_TARGET_deposit_i64_valid(ofs, len) 1
112 /* Only one of DIV or DIV2 should be defined. */
113 #if defined(TCG_TARGET_HAS_div_i32)
114 #define TCG_TARGET_HAS_div2_i32 0
115 #elif defined(TCG_TARGET_HAS_div2_i32)
116 #define TCG_TARGET_HAS_div_i32 0
117 #define TCG_TARGET_HAS_rem_i32 0
119 #if defined(TCG_TARGET_HAS_div_i64)
120 #define TCG_TARGET_HAS_div2_i64 0
121 #elif defined(TCG_TARGET_HAS_div2_i64)
122 #define TCG_TARGET_HAS_div_i64 0
123 #define TCG_TARGET_HAS_rem_i64 0
126 /* For 32-bit targets, some sort of unsigned widening multiply is required. */
127 #if TCG_TARGET_REG_BITS == 32 \
128 && !(defined(TCG_TARGET_HAS_mulu2_i32) \
129 || defined(TCG_TARGET_HAS_muluh_i32))
130 # error "Missing unsigned widening multiply"
133 #ifndef TARGET_INSN_START_EXTRA_WORDS
134 # define TARGET_INSN_START_WORDS 1
136 # define TARGET_INSN_START_WORDS (1 + TARGET_INSN_START_EXTRA_WORDS)
139 typedef enum TCGOpcode {
140 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
146 #define tcg_regset_clear(d) (d) = 0
147 #define tcg_regset_set(d, s) (d) = (s)
148 #define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
149 #define tcg_regset_set_reg(d, r) (d) |= 1L << (r)
150 #define tcg_regset_reset_reg(d, r) (d) &= ~(1L << (r))
151 #define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
152 #define tcg_regset_or(d, a, b) (d) = (a) | (b)
153 #define tcg_regset_and(d, a, b) (d) = (a) & (b)
154 #define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
155 #define tcg_regset_not(d, a) (d) = ~(a)
157 #ifndef TCG_TARGET_INSN_UNIT_SIZE
158 # error "Missing TCG_TARGET_INSN_UNIT_SIZE"
159 #elif TCG_TARGET_INSN_UNIT_SIZE == 1
160 typedef uint8_t tcg_insn_unit;
161 #elif TCG_TARGET_INSN_UNIT_SIZE == 2
162 typedef uint16_t tcg_insn_unit;
163 #elif TCG_TARGET_INSN_UNIT_SIZE == 4
164 typedef uint32_t tcg_insn_unit;
165 #elif TCG_TARGET_INSN_UNIT_SIZE == 8
166 typedef uint64_t tcg_insn_unit;
168 /* The port better have done this. */
172 typedef struct TCGRelocation {
173 struct TCGRelocation *next;
179 typedef struct TCGLabel {
180 unsigned has_value : 1;
184 tcg_insn_unit *value_ptr;
185 TCGRelocation *first_reloc;
189 typedef struct TCGPool {
190 struct TCGPool *next;
192 uint8_t data[0] __attribute__ ((aligned));
195 #define TCG_POOL_CHUNK_SIZE 32768
197 #define TCG_MAX_TEMPS 512
198 #define TCG_MAX_INSNS 512
200 /* when the size of the arguments of a called function is smaller than
201 this value, they are statically allocated in the TB stack frame */
202 #define TCG_STATIC_CALL_ARGS_SIZE 128
204 typedef enum TCGType {
207 TCG_TYPE_COUNT, /* number of different types */
209 /* An alias for the size of the host register. */
210 #if TCG_TARGET_REG_BITS == 32
211 TCG_TYPE_REG = TCG_TYPE_I32,
213 TCG_TYPE_REG = TCG_TYPE_I64,
216 /* An alias for the size of the native pointer. */
217 #if UINTPTR_MAX == UINT32_MAX
218 TCG_TYPE_PTR = TCG_TYPE_I32,
220 TCG_TYPE_PTR = TCG_TYPE_I64,
223 /* An alias for the size of the target "long", aka register. */
224 #if TARGET_LONG_BITS == 64
225 TCG_TYPE_TL = TCG_TYPE_I64,
227 TCG_TYPE_TL = TCG_TYPE_I32,
231 /* Constants for qemu_ld and qemu_st for the Memory Operation field. */
232 typedef enum TCGMemOp {
237 MO_SIZE = 3, /* Mask for the above. */
239 MO_SIGN = 4, /* Sign-extended, otherwise zero-extended. */
241 MO_BSWAP = 8, /* Host reverse endian. */
242 #ifdef HOST_WORDS_BIGENDIAN
249 #ifdef TARGET_WORDS_BIGENDIAN
255 /* MO_UNALN accesses are never checked for alignment.
256 MO_ALIGN accesses will result in a call to the CPU's
257 do_unaligned_access hook if the guest address is not aligned.
258 The default depends on whether the target CPU defines ALIGNED_ONLY. */
268 /* Combinations of the above, for ease of use. */
272 MO_SB = MO_SIGN | MO_8,
273 MO_SW = MO_SIGN | MO_16,
274 MO_SL = MO_SIGN | MO_32,
277 MO_LEUW = MO_LE | MO_UW,
278 MO_LEUL = MO_LE | MO_UL,
279 MO_LESW = MO_LE | MO_SW,
280 MO_LESL = MO_LE | MO_SL,
281 MO_LEQ = MO_LE | MO_Q,
283 MO_BEUW = MO_BE | MO_UW,
284 MO_BEUL = MO_BE | MO_UL,
285 MO_BESW = MO_BE | MO_SW,
286 MO_BESL = MO_BE | MO_SL,
287 MO_BEQ = MO_BE | MO_Q,
289 MO_TEUW = MO_TE | MO_UW,
290 MO_TEUL = MO_TE | MO_UL,
291 MO_TESW = MO_TE | MO_SW,
292 MO_TESL = MO_TE | MO_SL,
293 MO_TEQ = MO_TE | MO_Q,
295 MO_SSIZE = MO_SIZE | MO_SIGN,
298 typedef tcg_target_ulong TCGArg;
300 /* Define a type and accessor macros for variables. Using pointer types
301 is nice because it gives some level of type safely. Converting to and
302 from intptr_t rather than int reduces the number of sign-extension
303 instructions that get implied on 64-bit hosts. Users of tcg_gen_* don't
304 need to know about any of this, and should treat TCGv as an opaque type.
305 In addition we do typechecking for different types of variables. TCGv_i32
306 and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
307 are aliases for target_ulong and host pointer sized values respectively. */
309 typedef struct TCGv_i32_d *TCGv_i32;
310 typedef struct TCGv_i64_d *TCGv_i64;
311 typedef struct TCGv_ptr_d *TCGv_ptr;
312 typedef TCGv_ptr TCGv_env;
313 #if TARGET_LONG_BITS == 32
314 #define TCGv TCGv_i32
315 #elif TARGET_LONG_BITS == 64
316 #define TCGv TCGv_i64
318 #error Unhandled TARGET_LONG_BITS value
321 static inline TCGv_i32 QEMU_ARTIFICIAL MAKE_TCGV_I32(intptr_t i)
326 static inline TCGv_i64 QEMU_ARTIFICIAL MAKE_TCGV_I64(intptr_t i)
331 static inline TCGv_ptr QEMU_ARTIFICIAL MAKE_TCGV_PTR(intptr_t i)
336 static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_I32(TCGv_i32 t)
341 static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_I64(TCGv_i64 t)
346 static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_PTR(TCGv_ptr t)
351 #if TCG_TARGET_REG_BITS == 32
352 #define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
353 #define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
356 #define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
357 #define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
358 #define TCGV_EQUAL_PTR(a, b) (GET_TCGV_PTR(a) == GET_TCGV_PTR(b))
360 /* Dummy definition to avoid compiler warnings. */
361 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
362 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
363 #define TCGV_UNUSED_PTR(x) x = MAKE_TCGV_PTR(-1)
365 #define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
366 #define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
367 #define TCGV_IS_UNUSED_PTR(x) (GET_TCGV_PTR(x) == -1)
370 /* Helper does not read globals (either directly or through an exception). It
371 implies TCG_CALL_NO_WRITE_GLOBALS. */
372 #define TCG_CALL_NO_READ_GLOBALS 0x0010
373 /* Helper does not write globals */
374 #define TCG_CALL_NO_WRITE_GLOBALS 0x0020
375 /* Helper can be safely suppressed if the return value is not used. */
376 #define TCG_CALL_NO_SIDE_EFFECTS 0x0040
378 /* convenience version of most used call flags */
379 #define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS
380 #define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS
381 #define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS
382 #define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
383 #define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
385 /* used to align parameters */
386 #define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
387 #define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
389 /* Conditions. Note that these are laid out for easy manipulation by
391 bit 0 is used for inverting;
394 bit 3 is used with bit 0 for swapping signed/unsigned. */
397 TCG_COND_NEVER = 0 | 0 | 0 | 0,
398 TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
399 TCG_COND_EQ = 8 | 0 | 0 | 0,
400 TCG_COND_NE = 8 | 0 | 0 | 1,
402 TCG_COND_LT = 0 | 0 | 2 | 0,
403 TCG_COND_GE = 0 | 0 | 2 | 1,
404 TCG_COND_LE = 8 | 0 | 2 | 0,
405 TCG_COND_GT = 8 | 0 | 2 | 1,
407 TCG_COND_LTU = 0 | 4 | 0 | 0,
408 TCG_COND_GEU = 0 | 4 | 0 | 1,
409 TCG_COND_LEU = 8 | 4 | 0 | 0,
410 TCG_COND_GTU = 8 | 4 | 0 | 1,
413 /* Invert the sense of the comparison. */
414 static inline TCGCond tcg_invert_cond(TCGCond c)
416 return (TCGCond)(c ^ 1);
419 /* Swap the operands in a comparison. */
420 static inline TCGCond tcg_swap_cond(TCGCond c)
422 return c & 6 ? (TCGCond)(c ^ 9) : c;
425 /* Create an "unsigned" version of a "signed" comparison. */
426 static inline TCGCond tcg_unsigned_cond(TCGCond c)
428 return c & 2 ? (TCGCond)(c ^ 6) : c;
431 /* Must a comparison be considered unsigned? */
432 static inline bool is_unsigned_cond(TCGCond c)
437 /* Create a "high" version of a double-word comparison.
438 This removes equality from a LTE or GTE comparison. */
439 static inline TCGCond tcg_high_cond(TCGCond c)
446 return (TCGCond)(c ^ 8);
452 typedef enum TCGTempVal {
459 typedef struct TCGTemp {
461 TCGTempVal val_type:8;
464 unsigned int fixed_reg:1;
465 unsigned int indirect_reg:1;
466 unsigned int indirect_base:1;
467 unsigned int mem_coherent:1;
468 unsigned int mem_allocated:1;
469 unsigned int temp_local:1; /* If true, the temp is saved across
470 basic blocks. Otherwise, it is not
471 preserved across basic blocks. */
472 unsigned int temp_allocated:1; /* never used for code gen */
475 struct TCGTemp *mem_base;
480 typedef struct TCGContext TCGContext;
482 typedef struct TCGTempSet {
483 unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)];
486 typedef struct TCGOp {
489 /* The number of out and in parameter for a call. */
493 /* Index of the arguments for this op, or -1 for zero-operand ops. */
496 /* Index of the prex/next op, or -1 for the end of the list. */
501 QEMU_BUILD_BUG_ON(NB_OPS > 0xff);
502 QEMU_BUILD_BUG_ON(OPC_BUF_SIZE >= 0x7fff);
503 QEMU_BUILD_BUG_ON(OPPARAM_BUF_SIZE >= 0x7fff);
506 uint8_t *pool_cur, *pool_end;
507 TCGPool *pool_first, *pool_current, *pool_first_large;
512 /* goto_tb support */
513 tcg_insn_unit *code_buf;
514 uint16_t *tb_jmp_reset_offset; /* tb->jmp_reset_offset */
515 uint16_t *tb_jmp_insn_offset; /* tb->jmp_insn_offset if USE_DIRECT_JUMP */
516 uintptr_t *tb_jmp_target_addr; /* tb->jmp_target_addr if !USE_DIRECT_JUMP */
518 /* liveness analysis */
519 uint16_t *op_dead_args; /* for each operation, each bit tells if the
520 corresponding argument is dead */
521 uint8_t *op_sync_args; /* for each operation, each bit tells if the
522 corresponding output argument needs to be
525 TCGRegSet reserved_regs;
526 intptr_t current_frame_offset;
527 intptr_t frame_start;
531 tcg_insn_unit *code_ptr;
535 #ifdef CONFIG_PROFILER
539 int64_t op_count; /* total insn count */
540 int op_count_max; /* max insn per TB */
543 int64_t del_op_count;
545 int64_t code_out_len;
546 int64_t search_out_len;
551 int64_t restore_count;
552 int64_t restore_time;
555 #ifdef CONFIG_DEBUG_TCG
557 int goto_tb_issue_mask;
560 int gen_first_op_idx;
563 int gen_next_parm_idx;
565 /* Code generation. Note that we specifically do not use tcg_insn_unit
566 here, because there's too much arithmetic throughout that relies
567 on addition and subtraction working on bytes. Rely on the GCC
568 extension that allows arithmetic on void*. */
569 int code_gen_max_blocks;
570 void *code_gen_prologue;
571 void *code_gen_buffer;
572 size_t code_gen_buffer_size;
575 /* Threshold to flush the translated code buffer. */
576 void *code_gen_highwater;
580 /* The TCGBackendData structure is private to tcg-target.inc.c. */
581 struct TCGBackendData *be;
583 TCGTempSet free_temps[TCG_TYPE_COUNT * 2];
584 TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
586 /* Tells which temporary holds a given register.
587 It does not take into account fixed registers */
588 TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS];
590 TCGOp gen_op_buf[OPC_BUF_SIZE];
591 TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
593 uint16_t gen_insn_end_off[TCG_MAX_INSNS];
594 target_ulong gen_insn_data[TCG_MAX_INSNS][TARGET_INSN_START_WORDS];
597 extern TCGContext tcg_ctx;
599 static inline void tcg_set_insn_param(int op_idx, int arg, TCGArg v)
601 int op_argi = tcg_ctx.gen_op_buf[op_idx].args;
602 tcg_ctx.gen_opparam_buf[op_argi + arg] = v;
605 /* The number of opcodes emitted so far. */
606 static inline int tcg_op_buf_count(void)
608 return tcg_ctx.gen_next_op_idx;
611 /* Test for whether to terminate the TB for using too many opcodes. */
612 static inline bool tcg_op_buf_full(void)
614 return tcg_op_buf_count() >= OPC_MAX_SIZE;
617 /* pool based memory allocation */
619 void *tcg_malloc_internal(TCGContext *s, int size);
620 void tcg_pool_reset(TCGContext *s);
621 void tcg_pool_delete(TCGContext *s);
624 void tb_unlock(void);
625 void tb_lock_reset(void);
627 static inline void *tcg_malloc(int size)
629 TCGContext *s = &tcg_ctx;
630 uint8_t *ptr, *ptr_end;
631 size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
633 ptr_end = ptr + size;
634 if (unlikely(ptr_end > s->pool_end)) {
635 return tcg_malloc_internal(&tcg_ctx, size);
637 s->pool_cur = ptr_end;
642 void tcg_context_init(TCGContext *s);
643 void tcg_prologue_init(TCGContext *s);
644 void tcg_func_start(TCGContext *s);
646 int tcg_gen_code(TCGContext *s, TranslationBlock *tb);
648 void tcg_set_frame(TCGContext *s, TCGReg reg, intptr_t start, intptr_t size);
650 int tcg_global_mem_new_internal(TCGType, TCGv_ptr, intptr_t, const char *);
652 TCGv_i32 tcg_global_reg_new_i32(TCGReg reg, const char *name);
653 TCGv_i64 tcg_global_reg_new_i64(TCGReg reg, const char *name);
655 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
656 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
658 void tcg_temp_free_i32(TCGv_i32 arg);
659 void tcg_temp_free_i64(TCGv_i64 arg);
661 static inline TCGv_i32 tcg_global_mem_new_i32(TCGv_ptr reg, intptr_t offset,
664 int idx = tcg_global_mem_new_internal(TCG_TYPE_I32, reg, offset, name);
665 return MAKE_TCGV_I32(idx);
668 static inline TCGv_i32 tcg_temp_new_i32(void)
670 return tcg_temp_new_internal_i32(0);
673 static inline TCGv_i32 tcg_temp_local_new_i32(void)
675 return tcg_temp_new_internal_i32(1);
678 static inline TCGv_i64 tcg_global_mem_new_i64(TCGv_ptr reg, intptr_t offset,
681 int idx = tcg_global_mem_new_internal(TCG_TYPE_I64, reg, offset, name);
682 return MAKE_TCGV_I64(idx);
685 static inline TCGv_i64 tcg_temp_new_i64(void)
687 return tcg_temp_new_internal_i64(0);
690 static inline TCGv_i64 tcg_temp_local_new_i64(void)
692 return tcg_temp_new_internal_i64(1);
695 #if defined(CONFIG_DEBUG_TCG)
696 /* If you call tcg_clear_temp_count() at the start of a section of
697 * code which is not supposed to leak any TCG temporaries, then
698 * calling tcg_check_temp_count() at the end of the section will
699 * return 1 if the section did in fact leak a temporary.
701 void tcg_clear_temp_count(void);
702 int tcg_check_temp_count(void);
704 #define tcg_clear_temp_count() do { } while (0)
705 #define tcg_check_temp_count() 0
708 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
709 void tcg_dump_op_count(FILE *f, fprintf_function cpu_fprintf);
711 #define TCG_CT_ALIAS 0x80
712 #define TCG_CT_IALIAS 0x40
713 #define TCG_CT_REG 0x01
714 #define TCG_CT_CONST 0x02 /* any constant of register size */
716 typedef struct TCGArgConstraint {
724 #define TCG_MAX_OP_ARGS 16
726 /* Bits for TCGOpDef->flags, 8 bits available. */
728 /* Instruction defines the end of a basic block. */
729 TCG_OPF_BB_END = 0x01,
730 /* Instruction clobbers call registers and potentially update globals. */
731 TCG_OPF_CALL_CLOBBER = 0x02,
732 /* Instruction has side effects: it cannot be removed if its outputs
733 are not used, and might trigger exceptions. */
734 TCG_OPF_SIDE_EFFECTS = 0x04,
735 /* Instruction operands are 64-bits (otherwise 32-bits). */
736 TCG_OPF_64BIT = 0x08,
737 /* Instruction is optional and not implemented by the host, or insn
738 is generic and should not be implemened by the host. */
739 TCG_OPF_NOT_PRESENT = 0x10,
742 typedef struct TCGOpDef {
744 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
746 TCGArgConstraint *args_ct;
748 #if defined(CONFIG_DEBUG_TCG)
753 extern TCGOpDef tcg_op_defs[];
754 extern const size_t tcg_op_defs_max;
756 typedef struct TCGTargetOpDef {
758 const char *args_ct_str[TCG_MAX_OP_ARGS];
761 #define tcg_abort() \
763 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
767 #ifdef CONFIG_DEBUG_TCG
768 # define tcg_debug_assert(X) do { assert(X); } while (0)
769 #elif QEMU_GNUC_PREREQ(4, 5)
770 # define tcg_debug_assert(X) \
771 do { if (!(X)) { __builtin_unreachable(); } } while (0)
773 # define tcg_debug_assert(X) do { (void)(X); } while (0)
776 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
778 #if UINTPTR_MAX == UINT32_MAX
779 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
780 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
782 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((intptr_t)(V)))
783 #define tcg_global_reg_new_ptr(R, N) \
784 TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
785 #define tcg_global_mem_new_ptr(R, O, N) \
786 TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
787 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
788 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
790 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
791 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
793 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((intptr_t)(V)))
794 #define tcg_global_reg_new_ptr(R, N) \
795 TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
796 #define tcg_global_mem_new_ptr(R, O, N) \
797 TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
798 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
799 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
802 void tcg_gen_callN(TCGContext *s, void *func,
803 TCGArg ret, int nargs, TCGArg *args);
805 void tcg_op_remove(TCGContext *s, TCGOp *op);
806 void tcg_optimize(TCGContext *s);
808 /* only used for debugging purposes */
809 void tcg_dump_ops(TCGContext *s);
811 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
812 TCGv_i32 tcg_const_i32(int32_t val);
813 TCGv_i64 tcg_const_i64(int64_t val);
814 TCGv_i32 tcg_const_local_i32(int32_t val);
815 TCGv_i64 tcg_const_local_i64(int64_t val);
817 TCGLabel *gen_new_label(void);
823 * Encode a label for storage in the TCG opcode stream.
826 static inline TCGArg label_arg(TCGLabel *l)
835 * The opposite of label_arg. Retrieve a label from the
836 * encoding of the TCG opcode stream.
839 static inline TCGLabel *arg_label(TCGArg i)
841 return (TCGLabel *)(uintptr_t)i;
846 * @a, @b: addresses to be differenced
848 * There are many places within the TCG backends where we need a byte
849 * difference between two pointers. While this can be accomplished
850 * with local casting, it's easy to get wrong -- especially if one is
851 * concerned with the signedness of the result.
853 * This version relies on GCC's void pointer arithmetic to get the
857 static inline ptrdiff_t tcg_ptr_byte_diff(void *a, void *b)
864 * @s: the tcg context
865 * @target: address of the target
867 * Produce a pc-relative difference, from the current code_ptr
868 * to the destination address.
871 static inline ptrdiff_t tcg_pcrel_diff(TCGContext *s, void *target)
873 return tcg_ptr_byte_diff(target, s->code_ptr);
877 * tcg_current_code_size
878 * @s: the tcg context
880 * Compute the current code size within the translation block.
881 * This is used to fill in qemu's data structures for goto_tb.
884 static inline size_t tcg_current_code_size(TCGContext *s)
886 return tcg_ptr_byte_diff(s->code_ptr, s->code_buf);
889 /* Combine the TCGMemOp and mmu_idx parameters into a single value. */
890 typedef uint32_t TCGMemOpIdx;
894 * @op: memory operation
897 * Encode these values into a single parameter.
899 static inline TCGMemOpIdx make_memop_idx(TCGMemOp op, unsigned idx)
901 tcg_debug_assert(idx <= 15);
902 return (op << 4) | idx;
907 * @oi: combined op/idx parameter
909 * Extract the memory operation from the combined value.
911 static inline TCGMemOp get_memop(TCGMemOpIdx oi)
918 * @oi: combined op/idx parameter
920 * Extract the mmu index from the combined value.
922 static inline unsigned get_mmuidx(TCGMemOpIdx oi)
929 * @env: pointer to CPUArchState for the CPU
930 * @tb_ptr: address of generated code for the TB to execute
932 * Start executing code from a given translation block.
933 * Where translation blocks have been linked, execution
934 * may proceed from the given TB into successive ones.
935 * Control eventually returns only when some action is needed
936 * from the top-level loop: either control must pass to a TB
937 * which has not yet been directly linked, or an asynchronous
938 * event such as an interrupt needs handling.
940 * Return: The return value is the value passed to the corresponding
941 * tcg_gen_exit_tb() at translation time of the last TB attempted to execute.
942 * The value is either zero or a 4-byte aligned pointer to that TB combined
943 * with additional information in its two least significant bits. The
944 * additional information is encoded as follows:
945 * 0, 1: the link between this TB and the next is via the specified
946 * TB index (0 or 1). That is, we left the TB via (the equivalent
947 * of) "goto_tb <index>". The main loop uses this to determine
948 * how to link the TB just executed to the next.
949 * 2: we are using instruction counting code generation, and we
950 * did not start executing this TB because the instruction counter
951 * would hit zero midway through it. In this case the pointer
952 * returned is the TB we were about to execute, and the caller must
953 * arrange to execute the remaining count of instructions.
954 * 3: we stopped because the CPU's exit_request flag was set
955 * (usually meaning that there is an interrupt that needs to be
956 * handled). The pointer returned is the TB we were about to execute
957 * when we noticed the pending exit request.
959 * If the bottom two bits indicate an exit-via-index then the CPU
960 * state is correctly synchronised and ready for execution of the next
961 * TB (and in particular the guest PC is the address to execute next).
962 * Otherwise, we gave up on execution of this TB before it started, and
963 * the caller must fix up the CPU state by calling the CPU's
964 * synchronize_from_tb() method with the TB pointer we return (falling
965 * back to calling the CPU's set_pc method with tb->pb if no
966 * synchronize_from_tb() method exists).
968 * Note that TCG targets may use a different definition of tcg_qemu_tb_exec
969 * to this default (which just calls the prologue.code emitted by
970 * tcg_target_qemu_prologue()).
972 #define TB_EXIT_MASK 3
973 #define TB_EXIT_IDX0 0
974 #define TB_EXIT_IDX1 1
975 #define TB_EXIT_ICOUNT_EXPIRED 2
976 #define TB_EXIT_REQUESTED 3
978 #ifdef HAVE_TCG_QEMU_TB_EXEC
979 uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr);
981 # define tcg_qemu_tb_exec(env, tb_ptr) \
982 ((uintptr_t (*)(void *, void *))tcg_ctx.code_gen_prologue)(env, tb_ptr)
985 void tcg_register_jit(void *buf, size_t buf_size);
988 * Memory helpers that will be used by TCG generated code.
990 #ifdef CONFIG_SOFTMMU
991 /* Value zero-extended to tcg register size. */
992 tcg_target_ulong helper_ret_ldub_mmu(CPUArchState *env, target_ulong addr,
993 TCGMemOpIdx oi, uintptr_t retaddr);
994 tcg_target_ulong helper_le_lduw_mmu(CPUArchState *env, target_ulong addr,
995 TCGMemOpIdx oi, uintptr_t retaddr);
996 tcg_target_ulong helper_le_ldul_mmu(CPUArchState *env, target_ulong addr,
997 TCGMemOpIdx oi, uintptr_t retaddr);
998 uint64_t helper_le_ldq_mmu(CPUArchState *env, target_ulong addr,
999 TCGMemOpIdx oi, uintptr_t retaddr);
1000 tcg_target_ulong helper_be_lduw_mmu(CPUArchState *env, target_ulong addr,
1001 TCGMemOpIdx oi, uintptr_t retaddr);
1002 tcg_target_ulong helper_be_ldul_mmu(CPUArchState *env, target_ulong addr,
1003 TCGMemOpIdx oi, uintptr_t retaddr);
1004 uint64_t helper_be_ldq_mmu(CPUArchState *env, target_ulong addr,
1005 TCGMemOpIdx oi, uintptr_t retaddr);
1007 /* Value sign-extended to tcg register size. */
1008 tcg_target_ulong helper_ret_ldsb_mmu(CPUArchState *env, target_ulong addr,
1009 TCGMemOpIdx oi, uintptr_t retaddr);
1010 tcg_target_ulong helper_le_ldsw_mmu(CPUArchState *env, target_ulong addr,
1011 TCGMemOpIdx oi, uintptr_t retaddr);
1012 tcg_target_ulong helper_le_ldsl_mmu(CPUArchState *env, target_ulong addr,
1013 TCGMemOpIdx oi, uintptr_t retaddr);
1014 tcg_target_ulong helper_be_ldsw_mmu(CPUArchState *env, target_ulong addr,
1015 TCGMemOpIdx oi, uintptr_t retaddr);
1016 tcg_target_ulong helper_be_ldsl_mmu(CPUArchState *env, target_ulong addr,
1017 TCGMemOpIdx oi, uintptr_t retaddr);
1019 void helper_ret_stb_mmu(CPUArchState *env, target_ulong addr, uint8_t val,
1020 TCGMemOpIdx oi, uintptr_t retaddr);
1021 void helper_le_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
1022 TCGMemOpIdx oi, uintptr_t retaddr);
1023 void helper_le_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
1024 TCGMemOpIdx oi, uintptr_t retaddr);
1025 void helper_le_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
1026 TCGMemOpIdx oi, uintptr_t retaddr);
1027 void helper_be_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
1028 TCGMemOpIdx oi, uintptr_t retaddr);
1029 void helper_be_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
1030 TCGMemOpIdx oi, uintptr_t retaddr);
1031 void helper_be_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
1032 TCGMemOpIdx oi, uintptr_t retaddr);
1034 uint8_t helper_ret_ldb_cmmu(CPUArchState *env, target_ulong addr,
1035 TCGMemOpIdx oi, uintptr_t retaddr);
1036 uint16_t helper_le_ldw_cmmu(CPUArchState *env, target_ulong addr,
1037 TCGMemOpIdx oi, uintptr_t retaddr);
1038 uint32_t helper_le_ldl_cmmu(CPUArchState *env, target_ulong addr,
1039 TCGMemOpIdx oi, uintptr_t retaddr);
1040 uint64_t helper_le_ldq_cmmu(CPUArchState *env, target_ulong addr,
1041 TCGMemOpIdx oi, uintptr_t retaddr);
1042 uint16_t helper_be_ldw_cmmu(CPUArchState *env, target_ulong addr,
1043 TCGMemOpIdx oi, uintptr_t retaddr);
1044 uint32_t helper_be_ldl_cmmu(CPUArchState *env, target_ulong addr,
1045 TCGMemOpIdx oi, uintptr_t retaddr);
1046 uint64_t helper_be_ldq_cmmu(CPUArchState *env, target_ulong addr,
1047 TCGMemOpIdx oi, uintptr_t retaddr);
1049 /* Temporary aliases until backends are converted. */
1050 #ifdef TARGET_WORDS_BIGENDIAN
1051 # define helper_ret_ldsw_mmu helper_be_ldsw_mmu
1052 # define helper_ret_lduw_mmu helper_be_lduw_mmu
1053 # define helper_ret_ldsl_mmu helper_be_ldsl_mmu
1054 # define helper_ret_ldul_mmu helper_be_ldul_mmu
1055 # define helper_ret_ldl_mmu helper_be_ldul_mmu
1056 # define helper_ret_ldq_mmu helper_be_ldq_mmu
1057 # define helper_ret_stw_mmu helper_be_stw_mmu
1058 # define helper_ret_stl_mmu helper_be_stl_mmu
1059 # define helper_ret_stq_mmu helper_be_stq_mmu
1060 # define helper_ret_ldw_cmmu helper_be_ldw_cmmu
1061 # define helper_ret_ldl_cmmu helper_be_ldl_cmmu
1062 # define helper_ret_ldq_cmmu helper_be_ldq_cmmu
1064 # define helper_ret_ldsw_mmu helper_le_ldsw_mmu
1065 # define helper_ret_lduw_mmu helper_le_lduw_mmu
1066 # define helper_ret_ldsl_mmu helper_le_ldsl_mmu
1067 # define helper_ret_ldul_mmu helper_le_ldul_mmu
1068 # define helper_ret_ldl_mmu helper_le_ldul_mmu
1069 # define helper_ret_ldq_mmu helper_le_ldq_mmu
1070 # define helper_ret_stw_mmu helper_le_stw_mmu
1071 # define helper_ret_stl_mmu helper_le_stl_mmu
1072 # define helper_ret_stq_mmu helper_le_stq_mmu
1073 # define helper_ret_ldw_cmmu helper_le_ldw_cmmu
1074 # define helper_ret_ldl_cmmu helper_le_ldl_cmmu
1075 # define helper_ret_ldq_cmmu helper_le_ldq_cmmu
1078 #endif /* CONFIG_SOFTMMU */