xref: /qemu/include/tcg/tcg.h (revision 7c1f51bf)
1 /*
2  * Tiny Code Generator for QEMU
3  *
4  * Copyright (c) 2008 Fabrice Bellard
5  *
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:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
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
22  * THE SOFTWARE.
23  */
24 
25 #ifndef TCG_H
26 #define TCG_H
27 
28 #include "cpu.h"
29 #include "exec/memop.h"
30 #include "exec/memopidx.h"
31 #include "qemu/bitops.h"
32 #include "qemu/plugin.h"
33 #include "qemu/queue.h"
34 #include "tcg/tcg-mo.h"
35 #include "tcg-target.h"
36 #include "tcg/tcg-cond.h"
37 
38 /* XXX: make safe guess about sizes */
39 #define MAX_OP_PER_INSTR 266
40 
41 #define MAX_CALL_IARGS  7
42 
43 #define CPU_TEMP_BUF_NLONGS 128
44 #define TCG_STATIC_FRAME_SIZE  (CPU_TEMP_BUF_NLONGS * sizeof(long))
45 
46 /* Default target word size to pointer size.  */
47 #ifndef TCG_TARGET_REG_BITS
48 # if UINTPTR_MAX == UINT32_MAX
49 #  define TCG_TARGET_REG_BITS 32
50 # elif UINTPTR_MAX == UINT64_MAX
51 #  define TCG_TARGET_REG_BITS 64
52 # else
53 #  error Unknown pointer size for tcg target
54 # endif
55 #endif
56 
57 #if TCG_TARGET_REG_BITS == 32
58 typedef int32_t tcg_target_long;
59 typedef uint32_t tcg_target_ulong;
60 #define TCG_PRIlx PRIx32
61 #define TCG_PRIld PRId32
62 #elif TCG_TARGET_REG_BITS == 64
63 typedef int64_t tcg_target_long;
64 typedef uint64_t tcg_target_ulong;
65 #define TCG_PRIlx PRIx64
66 #define TCG_PRIld PRId64
67 #else
68 #error unsupported
69 #endif
70 
71 /* Oversized TCG guests make things like MTTCG hard
72  * as we can't use atomics for cputlb updates.
73  */
74 #if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
75 #define TCG_OVERSIZED_GUEST 1
76 #else
77 #define TCG_OVERSIZED_GUEST 0
78 #endif
79 
80 #if TCG_TARGET_NB_REGS <= 32
81 typedef uint32_t TCGRegSet;
82 #elif TCG_TARGET_NB_REGS <= 64
83 typedef uint64_t TCGRegSet;
84 #else
85 #error unsupported
86 #endif
87 
88 #if TCG_TARGET_REG_BITS == 32
89 /* Turn some undef macros into false macros.  */
90 #define TCG_TARGET_HAS_extrl_i64_i32    0
91 #define TCG_TARGET_HAS_extrh_i64_i32    0
92 #define TCG_TARGET_HAS_div_i64          0
93 #define TCG_TARGET_HAS_rem_i64          0
94 #define TCG_TARGET_HAS_div2_i64         0
95 #define TCG_TARGET_HAS_rot_i64          0
96 #define TCG_TARGET_HAS_ext8s_i64        0
97 #define TCG_TARGET_HAS_ext16s_i64       0
98 #define TCG_TARGET_HAS_ext32s_i64       0
99 #define TCG_TARGET_HAS_ext8u_i64        0
100 #define TCG_TARGET_HAS_ext16u_i64       0
101 #define TCG_TARGET_HAS_ext32u_i64       0
102 #define TCG_TARGET_HAS_bswap16_i64      0
103 #define TCG_TARGET_HAS_bswap32_i64      0
104 #define TCG_TARGET_HAS_bswap64_i64      0
105 #define TCG_TARGET_HAS_neg_i64          0
106 #define TCG_TARGET_HAS_not_i64          0
107 #define TCG_TARGET_HAS_andc_i64         0
108 #define TCG_TARGET_HAS_orc_i64          0
109 #define TCG_TARGET_HAS_eqv_i64          0
110 #define TCG_TARGET_HAS_nand_i64         0
111 #define TCG_TARGET_HAS_nor_i64          0
112 #define TCG_TARGET_HAS_clz_i64          0
113 #define TCG_TARGET_HAS_ctz_i64          0
114 #define TCG_TARGET_HAS_ctpop_i64        0
115 #define TCG_TARGET_HAS_deposit_i64      0
116 #define TCG_TARGET_HAS_extract_i64      0
117 #define TCG_TARGET_HAS_sextract_i64     0
118 #define TCG_TARGET_HAS_extract2_i64     0
119 #define TCG_TARGET_HAS_movcond_i64      0
120 #define TCG_TARGET_HAS_add2_i64         0
121 #define TCG_TARGET_HAS_sub2_i64         0
122 #define TCG_TARGET_HAS_mulu2_i64        0
123 #define TCG_TARGET_HAS_muls2_i64        0
124 #define TCG_TARGET_HAS_muluh_i64        0
125 #define TCG_TARGET_HAS_mulsh_i64        0
126 /* Turn some undef macros into true macros.  */
127 #define TCG_TARGET_HAS_add2_i32         1
128 #define TCG_TARGET_HAS_sub2_i32         1
129 #endif
130 
131 #ifndef TCG_TARGET_deposit_i32_valid
132 #define TCG_TARGET_deposit_i32_valid(ofs, len) 1
133 #endif
134 #ifndef TCG_TARGET_deposit_i64_valid
135 #define TCG_TARGET_deposit_i64_valid(ofs, len) 1
136 #endif
137 #ifndef TCG_TARGET_extract_i32_valid
138 #define TCG_TARGET_extract_i32_valid(ofs, len) 1
139 #endif
140 #ifndef TCG_TARGET_extract_i64_valid
141 #define TCG_TARGET_extract_i64_valid(ofs, len) 1
142 #endif
143 
144 /* Only one of DIV or DIV2 should be defined.  */
145 #if defined(TCG_TARGET_HAS_div_i32)
146 #define TCG_TARGET_HAS_div2_i32         0
147 #elif defined(TCG_TARGET_HAS_div2_i32)
148 #define TCG_TARGET_HAS_div_i32          0
149 #define TCG_TARGET_HAS_rem_i32          0
150 #endif
151 #if defined(TCG_TARGET_HAS_div_i64)
152 #define TCG_TARGET_HAS_div2_i64         0
153 #elif defined(TCG_TARGET_HAS_div2_i64)
154 #define TCG_TARGET_HAS_div_i64          0
155 #define TCG_TARGET_HAS_rem_i64          0
156 #endif
157 
158 #if !defined(TCG_TARGET_HAS_v64) \
159     && !defined(TCG_TARGET_HAS_v128) \
160     && !defined(TCG_TARGET_HAS_v256)
161 #define TCG_TARGET_MAYBE_vec            0
162 #define TCG_TARGET_HAS_abs_vec          0
163 #define TCG_TARGET_HAS_neg_vec          0
164 #define TCG_TARGET_HAS_not_vec          0
165 #define TCG_TARGET_HAS_andc_vec         0
166 #define TCG_TARGET_HAS_orc_vec          0
167 #define TCG_TARGET_HAS_nand_vec         0
168 #define TCG_TARGET_HAS_nor_vec          0
169 #define TCG_TARGET_HAS_eqv_vec          0
170 #define TCG_TARGET_HAS_roti_vec         0
171 #define TCG_TARGET_HAS_rots_vec         0
172 #define TCG_TARGET_HAS_rotv_vec         0
173 #define TCG_TARGET_HAS_shi_vec          0
174 #define TCG_TARGET_HAS_shs_vec          0
175 #define TCG_TARGET_HAS_shv_vec          0
176 #define TCG_TARGET_HAS_mul_vec          0
177 #define TCG_TARGET_HAS_sat_vec          0
178 #define TCG_TARGET_HAS_minmax_vec       0
179 #define TCG_TARGET_HAS_bitsel_vec       0
180 #define TCG_TARGET_HAS_cmpsel_vec       0
181 #else
182 #define TCG_TARGET_MAYBE_vec            1
183 #endif
184 #ifndef TCG_TARGET_HAS_v64
185 #define TCG_TARGET_HAS_v64              0
186 #endif
187 #ifndef TCG_TARGET_HAS_v128
188 #define TCG_TARGET_HAS_v128             0
189 #endif
190 #ifndef TCG_TARGET_HAS_v256
191 #define TCG_TARGET_HAS_v256             0
192 #endif
193 
194 #ifndef TARGET_INSN_START_EXTRA_WORDS
195 # define TARGET_INSN_START_WORDS 1
196 #else
197 # define TARGET_INSN_START_WORDS (1 + TARGET_INSN_START_EXTRA_WORDS)
198 #endif
199 
200 typedef enum TCGOpcode {
201 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
202 #include "tcg/tcg-opc.h"
203 #undef DEF
204     NB_OPS,
205 } TCGOpcode;
206 
207 #define tcg_regset_set_reg(d, r)   ((d) |= (TCGRegSet)1 << (r))
208 #define tcg_regset_reset_reg(d, r) ((d) &= ~((TCGRegSet)1 << (r)))
209 #define tcg_regset_test_reg(d, r)  (((d) >> (r)) & 1)
210 
211 #ifndef TCG_TARGET_INSN_UNIT_SIZE
212 # error "Missing TCG_TARGET_INSN_UNIT_SIZE"
213 #elif TCG_TARGET_INSN_UNIT_SIZE == 1
214 typedef uint8_t tcg_insn_unit;
215 #elif TCG_TARGET_INSN_UNIT_SIZE == 2
216 typedef uint16_t tcg_insn_unit;
217 #elif TCG_TARGET_INSN_UNIT_SIZE == 4
218 typedef uint32_t tcg_insn_unit;
219 #elif TCG_TARGET_INSN_UNIT_SIZE == 8
220 typedef uint64_t tcg_insn_unit;
221 #else
222 /* The port better have done this.  */
223 #endif
224 
225 
226 #if defined CONFIG_DEBUG_TCG || defined QEMU_STATIC_ANALYSIS
227 # define tcg_debug_assert(X) do { assert(X); } while (0)
228 #else
229 # define tcg_debug_assert(X) \
230     do { if (!(X)) { __builtin_unreachable(); } } while (0)
231 #endif
232 
233 typedef struct TCGRelocation TCGRelocation;
234 struct TCGRelocation {
235     QSIMPLEQ_ENTRY(TCGRelocation) next;
236     tcg_insn_unit *ptr;
237     intptr_t addend;
238     int type;
239 };
240 
241 typedef struct TCGOp TCGOp;
242 typedef struct TCGLabelUse TCGLabelUse;
243 struct TCGLabelUse {
244     QSIMPLEQ_ENTRY(TCGLabelUse) next;
245     TCGOp *op;
246 };
247 
248 typedef struct TCGLabel TCGLabel;
249 struct TCGLabel {
250     bool present;
251     bool has_value;
252     uint16_t id;
253     union {
254         uintptr_t value;
255         const tcg_insn_unit *value_ptr;
256     } u;
257     QSIMPLEQ_HEAD(, TCGLabelUse) branches;
258     QSIMPLEQ_HEAD(, TCGRelocation) relocs;
259     QSIMPLEQ_ENTRY(TCGLabel) next;
260 };
261 
262 typedef struct TCGPool {
263     struct TCGPool *next;
264     int size;
265     uint8_t data[] __attribute__ ((aligned));
266 } TCGPool;
267 
268 #define TCG_POOL_CHUNK_SIZE 32768
269 
270 #define TCG_MAX_TEMPS 512
271 #define TCG_MAX_INSNS 512
272 
273 /* when the size of the arguments of a called function is smaller than
274    this value, they are statically allocated in the TB stack frame */
275 #define TCG_STATIC_CALL_ARGS_SIZE 128
276 
277 typedef enum TCGType {
278     TCG_TYPE_I32,
279     TCG_TYPE_I64,
280     TCG_TYPE_I128,
281 
282     TCG_TYPE_V64,
283     TCG_TYPE_V128,
284     TCG_TYPE_V256,
285 
286     /* Number of different types (integer not enum) */
287 #define TCG_TYPE_COUNT  (TCG_TYPE_V256 + 1)
288 
289     /* An alias for the size of the host register.  */
290 #if TCG_TARGET_REG_BITS == 32
291     TCG_TYPE_REG = TCG_TYPE_I32,
292 #else
293     TCG_TYPE_REG = TCG_TYPE_I64,
294 #endif
295 
296     /* An alias for the size of the native pointer.  */
297 #if UINTPTR_MAX == UINT32_MAX
298     TCG_TYPE_PTR = TCG_TYPE_I32,
299 #else
300     TCG_TYPE_PTR = TCG_TYPE_I64,
301 #endif
302 
303     /* An alias for the size of the target "long", aka register.  */
304 #if TARGET_LONG_BITS == 64
305     TCG_TYPE_TL = TCG_TYPE_I64,
306 #else
307     TCG_TYPE_TL = TCG_TYPE_I32,
308 #endif
309 } TCGType;
310 
311 /**
312  * tcg_type_size
313  * @t: type
314  *
315  * Return the size of the type in bytes.
316  */
317 static inline int tcg_type_size(TCGType t)
318 {
319     unsigned i = t;
320     if (i >= TCG_TYPE_V64) {
321         tcg_debug_assert(i < TCG_TYPE_COUNT);
322         i -= TCG_TYPE_V64 - 1;
323     }
324     return 4 << i;
325 }
326 
327 /**
328  * get_alignment_bits
329  * @memop: MemOp value
330  *
331  * Extract the alignment size from the memop.
332  */
333 static inline unsigned get_alignment_bits(MemOp memop)
334 {
335     unsigned a = memop & MO_AMASK;
336 
337     if (a == MO_UNALN) {
338         /* No alignment required.  */
339         a = 0;
340     } else if (a == MO_ALIGN) {
341         /* A natural alignment requirement.  */
342         a = memop & MO_SIZE;
343     } else {
344         /* A specific alignment requirement.  */
345         a = a >> MO_ASHIFT;
346     }
347 #if defined(CONFIG_SOFTMMU)
348     /* The requested alignment cannot overlap the TLB flags.  */
349     tcg_debug_assert((TLB_FLAGS_MASK & ((1 << a) - 1)) == 0);
350 #endif
351     return a;
352 }
353 
354 typedef tcg_target_ulong TCGArg;
355 
356 /* Define type and accessor macros for TCG variables.
357 
358    TCG variables are the inputs and outputs of TCG ops, as described
359    in tcg/README. Target CPU front-end code uses these types to deal
360    with TCG variables as it emits TCG code via the tcg_gen_* functions.
361    They come in several flavours:
362     * TCGv_i32  : 32 bit integer type
363     * TCGv_i64  : 64 bit integer type
364     * TCGv_i128 : 128 bit integer type
365     * TCGv_ptr  : a host pointer type
366     * TCGv_vec  : a host vector type; the exact size is not exposed
367                   to the CPU front-end code.
368     * TCGv      : an integer type the same size as target_ulong
369                   (an alias for either TCGv_i32 or TCGv_i64)
370    The compiler's type checking will complain if you mix them
371    up and pass the wrong sized TCGv to a function.
372 
373    Users of tcg_gen_* don't need to know about any of the internal
374    details of these, and should treat them as opaque types.
375    You won't be able to look inside them in a debugger either.
376 
377    Internal implementation details follow:
378 
379    Note that there is no definition of the structs TCGv_i32_d etc anywhere.
380    This is deliberate, because the values we store in variables of type
381    TCGv_i32 are not really pointers-to-structures. They're just small
382    integers, but keeping them in pointer types like this means that the
383    compiler will complain if you accidentally pass a TCGv_i32 to a
384    function which takes a TCGv_i64, and so on. Only the internals of
385    TCG need to care about the actual contents of the types.  */
386 
387 typedef struct TCGv_i32_d *TCGv_i32;
388 typedef struct TCGv_i64_d *TCGv_i64;
389 typedef struct TCGv_i128_d *TCGv_i128;
390 typedef struct TCGv_ptr_d *TCGv_ptr;
391 typedef struct TCGv_vec_d *TCGv_vec;
392 typedef TCGv_ptr TCGv_env;
393 #if TARGET_LONG_BITS == 32
394 #define TCGv TCGv_i32
395 #elif TARGET_LONG_BITS == 64
396 #define TCGv TCGv_i64
397 #else
398 #error Unhandled TARGET_LONG_BITS value
399 #endif
400 
401 /* call flags */
402 /* Helper does not read globals (either directly or through an exception). It
403    implies TCG_CALL_NO_WRITE_GLOBALS. */
404 #define TCG_CALL_NO_READ_GLOBALS    0x0001
405 /* Helper does not write globals */
406 #define TCG_CALL_NO_WRITE_GLOBALS   0x0002
407 /* Helper can be safely suppressed if the return value is not used. */
408 #define TCG_CALL_NO_SIDE_EFFECTS    0x0004
409 /* Helper is G_NORETURN.  */
410 #define TCG_CALL_NO_RETURN          0x0008
411 /* Helper is part of Plugins.  */
412 #define TCG_CALL_PLUGIN             0x0010
413 
414 /* convenience version of most used call flags */
415 #define TCG_CALL_NO_RWG         TCG_CALL_NO_READ_GLOBALS
416 #define TCG_CALL_NO_WG          TCG_CALL_NO_WRITE_GLOBALS
417 #define TCG_CALL_NO_SE          TCG_CALL_NO_SIDE_EFFECTS
418 #define TCG_CALL_NO_RWG_SE      (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
419 #define TCG_CALL_NO_WG_SE       (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
420 
421 /*
422  * Flags for the bswap opcodes.
423  * If IZ, the input is zero-extended, otherwise unknown.
424  * If OZ or OS, the output is zero- or sign-extended respectively,
425  * otherwise the high bits are undefined.
426  */
427 enum {
428     TCG_BSWAP_IZ = 1,
429     TCG_BSWAP_OZ = 2,
430     TCG_BSWAP_OS = 4,
431 };
432 
433 typedef enum TCGTempVal {
434     TEMP_VAL_DEAD,
435     TEMP_VAL_REG,
436     TEMP_VAL_MEM,
437     TEMP_VAL_CONST,
438 } TCGTempVal;
439 
440 typedef enum TCGTempKind {
441     /*
442      * Temp is dead at the end of the extended basic block (EBB),
443      * the single-entry multiple-exit region that falls through
444      * conditional branches.
445      */
446     TEMP_EBB,
447     /* Temp is live across the entire translation block, but dead at end. */
448     TEMP_TB,
449     /* Temp is live across the entire translation block, and between them. */
450     TEMP_GLOBAL,
451     /* Temp is in a fixed register. */
452     TEMP_FIXED,
453     /* Temp is a fixed constant. */
454     TEMP_CONST,
455 } TCGTempKind;
456 
457 typedef struct TCGTemp {
458     TCGReg reg:8;
459     TCGTempVal val_type:8;
460     TCGType base_type:8;
461     TCGType type:8;
462     TCGTempKind kind:3;
463     unsigned int indirect_reg:1;
464     unsigned int indirect_base:1;
465     unsigned int mem_coherent:1;
466     unsigned int mem_allocated:1;
467     unsigned int temp_allocated:1;
468     unsigned int temp_subindex:1;
469 
470     int64_t val;
471     struct TCGTemp *mem_base;
472     intptr_t mem_offset;
473     const char *name;
474 
475     /* Pass-specific information that can be stored for a temporary.
476        One word worth of integer data, and one pointer to data
477        allocated separately.  */
478     uintptr_t state;
479     void *state_ptr;
480 } TCGTemp;
481 
482 typedef struct TCGContext TCGContext;
483 
484 typedef struct TCGTempSet {
485     unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)];
486 } TCGTempSet;
487 
488 /*
489  * With 1 128-bit output, a 32-bit host requires 4 output parameters,
490  * which leaves a maximum of 28 other slots.  Which is enough for 7
491  * 128-bit operands.
492  */
493 #define DEAD_ARG  (1 << 4)
494 #define SYNC_ARG  (1 << 0)
495 typedef uint32_t TCGLifeData;
496 
497 struct TCGOp {
498     TCGOpcode opc   : 8;
499     unsigned nargs  : 8;
500 
501     /* Parameters for this opcode.  See below.  */
502     unsigned param1 : 8;
503     unsigned param2 : 8;
504 
505     /* Lifetime data of the operands.  */
506     TCGLifeData life;
507 
508     /* Next and previous opcodes.  */
509     QTAILQ_ENTRY(TCGOp) link;
510 
511     /* Register preferences for the output(s).  */
512     TCGRegSet output_pref[2];
513 
514     /* Arguments for the opcode.  */
515     TCGArg args[];
516 };
517 
518 #define TCGOP_CALLI(X)    (X)->param1
519 #define TCGOP_CALLO(X)    (X)->param2
520 
521 #define TCGOP_VECL(X)     (X)->param1
522 #define TCGOP_VECE(X)     (X)->param2
523 
524 /* Make sure operands fit in the bitfields above.  */
525 QEMU_BUILD_BUG_ON(NB_OPS > (1 << 8));
526 
527 static inline TCGRegSet output_pref(const TCGOp *op, unsigned i)
528 {
529     return i < ARRAY_SIZE(op->output_pref) ? op->output_pref[i] : 0;
530 }
531 
532 typedef struct TCGProfile {
533     int64_t cpu_exec_time;
534     int64_t tb_count1;
535     int64_t tb_count;
536     int64_t op_count; /* total insn count */
537     int op_count_max; /* max insn per TB */
538     int temp_count_max;
539     int64_t temp_count;
540     int64_t del_op_count;
541     int64_t code_in_len;
542     int64_t code_out_len;
543     int64_t search_out_len;
544     int64_t interm_time;
545     int64_t code_time;
546     int64_t la_time;
547     int64_t opt_time;
548     int64_t restore_count;
549     int64_t restore_time;
550     int64_t table_op_count[NB_OPS];
551 } TCGProfile;
552 
553 struct TCGContext {
554     uint8_t *pool_cur, *pool_end;
555     TCGPool *pool_first, *pool_current, *pool_first_large;
556     int nb_labels;
557     int nb_globals;
558     int nb_temps;
559     int nb_indirects;
560     int nb_ops;
561     TCGType addr_type;            /* TCG_TYPE_I32 or TCG_TYPE_I64 */
562 
563 #ifdef CONFIG_SOFTMMU
564     int page_mask;
565     uint8_t page_bits;
566     uint8_t tlb_dyn_max_bits;
567 #endif
568 
569     TCGRegSet reserved_regs;
570     intptr_t current_frame_offset;
571     intptr_t frame_start;
572     intptr_t frame_end;
573     TCGTemp *frame_temp;
574 
575     TranslationBlock *gen_tb;     /* tb for which code is being generated */
576     tcg_insn_unit *code_buf;      /* pointer for start of tb */
577     tcg_insn_unit *code_ptr;      /* pointer for running end of tb */
578 
579 #ifdef CONFIG_PROFILER
580     TCGProfile prof;
581 #endif
582 
583 #ifdef CONFIG_DEBUG_TCG
584     int goto_tb_issue_mask;
585     const TCGOpcode *vecop_list;
586 #endif
587 
588     /* Code generation.  Note that we specifically do not use tcg_insn_unit
589        here, because there's too much arithmetic throughout that relies
590        on addition and subtraction working on bytes.  Rely on the GCC
591        extension that allows arithmetic on void*.  */
592     void *code_gen_buffer;
593     size_t code_gen_buffer_size;
594     void *code_gen_ptr;
595     void *data_gen_ptr;
596 
597     /* Threshold to flush the translated code buffer.  */
598     void *code_gen_highwater;
599 
600     /* Track which vCPU triggers events */
601     CPUState *cpu;                      /* *_trans */
602 
603     /* These structures are private to tcg-target.c.inc.  */
604 #ifdef TCG_TARGET_NEED_LDST_LABELS
605     QSIMPLEQ_HEAD(, TCGLabelQemuLdst) ldst_labels;
606 #endif
607 #ifdef TCG_TARGET_NEED_POOL_LABELS
608     struct TCGLabelPoolData *pool_labels;
609 #endif
610 
611     TCGLabel *exitreq_label;
612 
613 #ifdef CONFIG_PLUGIN
614     /*
615      * We keep one plugin_tb struct per TCGContext. Note that on every TB
616      * translation we clear but do not free its contents; this way we
617      * avoid a lot of malloc/free churn, since after a few TB's it's
618      * unlikely that we'll need to allocate either more instructions or more
619      * space for instructions (for variable-instruction-length ISAs).
620      */
621     struct qemu_plugin_tb *plugin_tb;
622 
623     /* descriptor of the instruction being translated */
624     struct qemu_plugin_insn *plugin_insn;
625 #endif
626 
627     GHashTable *const_table[TCG_TYPE_COUNT];
628     TCGTempSet free_temps[TCG_TYPE_COUNT];
629     TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
630 
631     QTAILQ_HEAD(, TCGOp) ops, free_ops;
632     QSIMPLEQ_HEAD(, TCGLabel) labels;
633 
634     /* Tells which temporary holds a given register.
635        It does not take into account fixed registers */
636     TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS];
637 
638     uint16_t gen_insn_end_off[TCG_MAX_INSNS];
639     uint64_t gen_insn_data[TCG_MAX_INSNS][TARGET_INSN_START_WORDS];
640 
641     /* Exit to translator on overflow. */
642     sigjmp_buf jmp_trans;
643 };
644 
645 static inline bool temp_readonly(TCGTemp *ts)
646 {
647     return ts->kind >= TEMP_FIXED;
648 }
649 
650 extern __thread TCGContext *tcg_ctx;
651 extern const void *tcg_code_gen_epilogue;
652 extern uintptr_t tcg_splitwx_diff;
653 extern TCGv_env cpu_env;
654 
655 bool in_code_gen_buffer(const void *p);
656 
657 #ifdef CONFIG_DEBUG_TCG
658 const void *tcg_splitwx_to_rx(void *rw);
659 void *tcg_splitwx_to_rw(const void *rx);
660 #else
661 static inline const void *tcg_splitwx_to_rx(void *rw)
662 {
663     return rw ? rw + tcg_splitwx_diff : NULL;
664 }
665 
666 static inline void *tcg_splitwx_to_rw(const void *rx)
667 {
668     return rx ? (void *)rx - tcg_splitwx_diff : NULL;
669 }
670 #endif
671 
672 static inline size_t temp_idx(TCGTemp *ts)
673 {
674     ptrdiff_t n = ts - tcg_ctx->temps;
675     tcg_debug_assert(n >= 0 && n < tcg_ctx->nb_temps);
676     return n;
677 }
678 
679 static inline TCGArg temp_arg(TCGTemp *ts)
680 {
681     return (uintptr_t)ts;
682 }
683 
684 static inline TCGTemp *arg_temp(TCGArg a)
685 {
686     return (TCGTemp *)(uintptr_t)a;
687 }
688 
689 /* Using the offset of a temporary, relative to TCGContext, rather than
690    its index means that we don't use 0.  That leaves offset 0 free for
691    a NULL representation without having to leave index 0 unused.  */
692 static inline TCGTemp *tcgv_i32_temp(TCGv_i32 v)
693 {
694     uintptr_t o = (uintptr_t)v;
695     TCGTemp *t = (void *)tcg_ctx + o;
696     tcg_debug_assert(offsetof(TCGContext, temps[temp_idx(t)]) == o);
697     return t;
698 }
699 
700 static inline TCGTemp *tcgv_i64_temp(TCGv_i64 v)
701 {
702     return tcgv_i32_temp((TCGv_i32)v);
703 }
704 
705 static inline TCGTemp *tcgv_i128_temp(TCGv_i128 v)
706 {
707     return tcgv_i32_temp((TCGv_i32)v);
708 }
709 
710 static inline TCGTemp *tcgv_ptr_temp(TCGv_ptr v)
711 {
712     return tcgv_i32_temp((TCGv_i32)v);
713 }
714 
715 static inline TCGTemp *tcgv_vec_temp(TCGv_vec v)
716 {
717     return tcgv_i32_temp((TCGv_i32)v);
718 }
719 
720 static inline TCGArg tcgv_i32_arg(TCGv_i32 v)
721 {
722     return temp_arg(tcgv_i32_temp(v));
723 }
724 
725 static inline TCGArg tcgv_i64_arg(TCGv_i64 v)
726 {
727     return temp_arg(tcgv_i64_temp(v));
728 }
729 
730 static inline TCGArg tcgv_i128_arg(TCGv_i128 v)
731 {
732     return temp_arg(tcgv_i128_temp(v));
733 }
734 
735 static inline TCGArg tcgv_ptr_arg(TCGv_ptr v)
736 {
737     return temp_arg(tcgv_ptr_temp(v));
738 }
739 
740 static inline TCGArg tcgv_vec_arg(TCGv_vec v)
741 {
742     return temp_arg(tcgv_vec_temp(v));
743 }
744 
745 static inline TCGv_i32 temp_tcgv_i32(TCGTemp *t)
746 {
747     (void)temp_idx(t); /* trigger embedded assert */
748     return (TCGv_i32)((void *)t - (void *)tcg_ctx);
749 }
750 
751 static inline TCGv_i64 temp_tcgv_i64(TCGTemp *t)
752 {
753     return (TCGv_i64)temp_tcgv_i32(t);
754 }
755 
756 static inline TCGv_i128 temp_tcgv_i128(TCGTemp *t)
757 {
758     return (TCGv_i128)temp_tcgv_i32(t);
759 }
760 
761 static inline TCGv_ptr temp_tcgv_ptr(TCGTemp *t)
762 {
763     return (TCGv_ptr)temp_tcgv_i32(t);
764 }
765 
766 static inline TCGv_vec temp_tcgv_vec(TCGTemp *t)
767 {
768     return (TCGv_vec)temp_tcgv_i32(t);
769 }
770 
771 static inline TCGArg tcg_get_insn_param(TCGOp *op, int arg)
772 {
773     return op->args[arg];
774 }
775 
776 static inline void tcg_set_insn_param(TCGOp *op, int arg, TCGArg v)
777 {
778     op->args[arg] = v;
779 }
780 
781 static inline uint64_t tcg_get_insn_start_param(TCGOp *op, int arg)
782 {
783     if (TCG_TARGET_REG_BITS == 64) {
784         return tcg_get_insn_param(op, arg);
785     } else {
786         return deposit64(tcg_get_insn_param(op, arg * 2), 32, 32,
787                          tcg_get_insn_param(op, arg * 2 + 1));
788     }
789 }
790 
791 static inline void tcg_set_insn_start_param(TCGOp *op, int arg, uint64_t v)
792 {
793     if (TCG_TARGET_REG_BITS == 64) {
794         tcg_set_insn_param(op, arg, v);
795     } else {
796         tcg_set_insn_param(op, arg * 2, v);
797         tcg_set_insn_param(op, arg * 2 + 1, v >> 32);
798     }
799 }
800 
801 /* The last op that was emitted.  */
802 static inline TCGOp *tcg_last_op(void)
803 {
804     return QTAILQ_LAST(&tcg_ctx->ops);
805 }
806 
807 /* Test for whether to terminate the TB for using too many opcodes.  */
808 static inline bool tcg_op_buf_full(void)
809 {
810     /* This is not a hard limit, it merely stops translation when
811      * we have produced "enough" opcodes.  We want to limit TB size
812      * such that a RISC host can reasonably use a 16-bit signed
813      * branch within the TB.  We also need to be mindful of the
814      * 16-bit unsigned offsets, TranslationBlock.jmp_reset_offset[]
815      * and TCGContext.gen_insn_end_off[].
816      */
817     return tcg_ctx->nb_ops >= 4000;
818 }
819 
820 /* pool based memory allocation */
821 
822 /* user-mode: mmap_lock must be held for tcg_malloc_internal. */
823 void *tcg_malloc_internal(TCGContext *s, int size);
824 void tcg_pool_reset(TCGContext *s);
825 TranslationBlock *tcg_tb_alloc(TCGContext *s);
826 
827 void tcg_region_reset_all(void);
828 
829 size_t tcg_code_size(void);
830 size_t tcg_code_capacity(void);
831 
832 void tcg_tb_insert(TranslationBlock *tb);
833 void tcg_tb_remove(TranslationBlock *tb);
834 TranslationBlock *tcg_tb_lookup(uintptr_t tc_ptr);
835 void tcg_tb_foreach(GTraverseFunc func, gpointer user_data);
836 size_t tcg_nb_tbs(void);
837 
838 /* user-mode: Called with mmap_lock held.  */
839 static inline void *tcg_malloc(int size)
840 {
841     TCGContext *s = tcg_ctx;
842     uint8_t *ptr, *ptr_end;
843 
844     /* ??? This is a weak placeholder for minimum malloc alignment.  */
845     size = QEMU_ALIGN_UP(size, 8);
846 
847     ptr = s->pool_cur;
848     ptr_end = ptr + size;
849     if (unlikely(ptr_end > s->pool_end)) {
850         return tcg_malloc_internal(tcg_ctx, size);
851     } else {
852         s->pool_cur = ptr_end;
853         return ptr;
854     }
855 }
856 
857 void tcg_init(size_t tb_size, int splitwx, unsigned max_cpus);
858 void tcg_register_thread(void);
859 void tcg_prologue_init(TCGContext *s);
860 void tcg_func_start(TCGContext *s);
861 
862 int tcg_gen_code(TCGContext *s, TranslationBlock *tb, uint64_t pc_start);
863 
864 void tb_target_set_jmp_target(const TranslationBlock *, int,
865                               uintptr_t, uintptr_t);
866 
867 void tcg_set_frame(TCGContext *s, TCGReg reg, intptr_t start, intptr_t size);
868 
869 TCGTemp *tcg_global_mem_new_internal(TCGType, TCGv_ptr,
870                                      intptr_t, const char *);
871 TCGTemp *tcg_temp_new_internal(TCGType, TCGTempKind);
872 TCGv_vec tcg_temp_new_vec(TCGType type);
873 TCGv_vec tcg_temp_new_vec_matching(TCGv_vec match);
874 
875 static inline TCGv_i32 tcg_global_mem_new_i32(TCGv_ptr reg, intptr_t offset,
876                                               const char *name)
877 {
878     TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_I32, reg, offset, name);
879     return temp_tcgv_i32(t);
880 }
881 
882 static inline TCGv_i32 tcg_temp_new_i32(void)
883 {
884     TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I32, TEMP_TB);
885     return temp_tcgv_i32(t);
886 }
887 
888 static inline TCGv_i64 tcg_global_mem_new_i64(TCGv_ptr reg, intptr_t offset,
889                                               const char *name)
890 {
891     TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_I64, reg, offset, name);
892     return temp_tcgv_i64(t);
893 }
894 
895 static inline TCGv_i64 tcg_temp_new_i64(void)
896 {
897     TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I64, TEMP_TB);
898     return temp_tcgv_i64(t);
899 }
900 
901 static inline TCGv_i128 tcg_temp_new_i128(void)
902 {
903     TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I128, TEMP_TB);
904     return temp_tcgv_i128(t);
905 }
906 
907 static inline TCGv_ptr tcg_global_mem_new_ptr(TCGv_ptr reg, intptr_t offset,
908                                               const char *name)
909 {
910     TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_PTR, reg, offset, name);
911     return temp_tcgv_ptr(t);
912 }
913 
914 static inline TCGv_ptr tcg_temp_new_ptr(void)
915 {
916     TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_PTR, TEMP_TB);
917     return temp_tcgv_ptr(t);
918 }
919 
920 int64_t tcg_cpu_exec_time(void);
921 void tcg_dump_info(GString *buf);
922 void tcg_dump_op_count(GString *buf);
923 
924 #define TCG_CT_CONST  1 /* any constant of register size */
925 
926 typedef struct TCGArgConstraint {
927     unsigned ct : 16;
928     unsigned alias_index : 4;
929     unsigned sort_index : 4;
930     unsigned pair_index : 4;
931     unsigned pair : 2;  /* 0: none, 1: first, 2: second, 3: second alias */
932     bool oalias : 1;
933     bool ialias : 1;
934     bool newreg : 1;
935     TCGRegSet regs;
936 } TCGArgConstraint;
937 
938 #define TCG_MAX_OP_ARGS 16
939 
940 /* Bits for TCGOpDef->flags, 8 bits available, all used.  */
941 enum {
942     /* Instruction exits the translation block.  */
943     TCG_OPF_BB_EXIT      = 0x01,
944     /* Instruction defines the end of a basic block.  */
945     TCG_OPF_BB_END       = 0x02,
946     /* Instruction clobbers call registers and potentially update globals.  */
947     TCG_OPF_CALL_CLOBBER = 0x04,
948     /* Instruction has side effects: it cannot be removed if its outputs
949        are not used, and might trigger exceptions.  */
950     TCG_OPF_SIDE_EFFECTS = 0x08,
951     /* Instruction operands are 64-bits (otherwise 32-bits).  */
952     TCG_OPF_64BIT        = 0x10,
953     /* Instruction is optional and not implemented by the host, or insn
954        is generic and should not be implemened by the host.  */
955     TCG_OPF_NOT_PRESENT  = 0x20,
956     /* Instruction operands are vectors.  */
957     TCG_OPF_VECTOR       = 0x40,
958     /* Instruction is a conditional branch. */
959     TCG_OPF_COND_BRANCH  = 0x80
960 };
961 
962 typedef struct TCGOpDef {
963     const char *name;
964     uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
965     uint8_t flags;
966     TCGArgConstraint *args_ct;
967 } TCGOpDef;
968 
969 extern TCGOpDef tcg_op_defs[];
970 extern const size_t tcg_op_defs_max;
971 
972 typedef struct TCGTargetOpDef {
973     TCGOpcode op;
974     const char *args_ct_str[TCG_MAX_OP_ARGS];
975 } TCGTargetOpDef;
976 
977 bool tcg_op_supported(TCGOpcode op);
978 
979 void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args);
980 
981 TCGOp *tcg_emit_op(TCGOpcode opc, unsigned nargs);
982 void tcg_op_remove(TCGContext *s, TCGOp *op);
983 TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *op,
984                             TCGOpcode opc, unsigned nargs);
985 TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *op,
986                            TCGOpcode opc, unsigned nargs);
987 
988 /**
989  * tcg_remove_ops_after:
990  * @op: target operation
991  *
992  * Discard any opcodes emitted since @op.  Expected usage is to save
993  * a starting point with tcg_last_op(), speculatively emit opcodes,
994  * then decide whether or not to keep those opcodes after the fact.
995  */
996 void tcg_remove_ops_after(TCGOp *op);
997 
998 void tcg_optimize(TCGContext *s);
999 
1000 /*
1001  * Locate or create a read-only temporary that is a constant.
1002  * This kind of temporary need not be freed, but for convenience
1003  * will be silently ignored by tcg_temp_free_*.
1004  */
1005 TCGTemp *tcg_constant_internal(TCGType type, int64_t val);
1006 
1007 static inline TCGv_i32 tcg_constant_i32(int32_t val)
1008 {
1009     return temp_tcgv_i32(tcg_constant_internal(TCG_TYPE_I32, val));
1010 }
1011 
1012 static inline TCGv_i64 tcg_constant_i64(int64_t val)
1013 {
1014     return temp_tcgv_i64(tcg_constant_internal(TCG_TYPE_I64, val));
1015 }
1016 
1017 TCGv_vec tcg_constant_vec(TCGType type, unsigned vece, int64_t val);
1018 TCGv_vec tcg_constant_vec_matching(TCGv_vec match, unsigned vece, int64_t val);
1019 
1020 #if UINTPTR_MAX == UINT32_MAX
1021 # define tcg_constant_ptr(x)     ((TCGv_ptr)tcg_constant_i32((intptr_t)(x)))
1022 #else
1023 # define tcg_constant_ptr(x)     ((TCGv_ptr)tcg_constant_i64((intptr_t)(x)))
1024 #endif
1025 
1026 TCGLabel *gen_new_label(void);
1027 
1028 /**
1029  * label_arg
1030  * @l: label
1031  *
1032  * Encode a label for storage in the TCG opcode stream.
1033  */
1034 
1035 static inline TCGArg label_arg(TCGLabel *l)
1036 {
1037     return (uintptr_t)l;
1038 }
1039 
1040 /**
1041  * arg_label
1042  * @i: value
1043  *
1044  * The opposite of label_arg.  Retrieve a label from the
1045  * encoding of the TCG opcode stream.
1046  */
1047 
1048 static inline TCGLabel *arg_label(TCGArg i)
1049 {
1050     return (TCGLabel *)(uintptr_t)i;
1051 }
1052 
1053 /**
1054  * tcg_ptr_byte_diff
1055  * @a, @b: addresses to be differenced
1056  *
1057  * There are many places within the TCG backends where we need a byte
1058  * difference between two pointers.  While this can be accomplished
1059  * with local casting, it's easy to get wrong -- especially if one is
1060  * concerned with the signedness of the result.
1061  *
1062  * This version relies on GCC's void pointer arithmetic to get the
1063  * correct result.
1064  */
1065 
1066 static inline ptrdiff_t tcg_ptr_byte_diff(const void *a, const void *b)
1067 {
1068     return a - b;
1069 }
1070 
1071 /**
1072  * tcg_pcrel_diff
1073  * @s: the tcg context
1074  * @target: address of the target
1075  *
1076  * Produce a pc-relative difference, from the current code_ptr
1077  * to the destination address.
1078  */
1079 
1080 static inline ptrdiff_t tcg_pcrel_diff(TCGContext *s, const void *target)
1081 {
1082     return tcg_ptr_byte_diff(target, tcg_splitwx_to_rx(s->code_ptr));
1083 }
1084 
1085 /**
1086  * tcg_tbrel_diff
1087  * @s: the tcg context
1088  * @target: address of the target
1089  *
1090  * Produce a difference, from the beginning of the current TB code
1091  * to the destination address.
1092  */
1093 static inline ptrdiff_t tcg_tbrel_diff(TCGContext *s, const void *target)
1094 {
1095     return tcg_ptr_byte_diff(target, tcg_splitwx_to_rx(s->code_buf));
1096 }
1097 
1098 /**
1099  * tcg_current_code_size
1100  * @s: the tcg context
1101  *
1102  * Compute the current code size within the translation block.
1103  * This is used to fill in qemu's data structures for goto_tb.
1104  */
1105 
1106 static inline size_t tcg_current_code_size(TCGContext *s)
1107 {
1108     return tcg_ptr_byte_diff(s->code_ptr, s->code_buf);
1109 }
1110 
1111 /**
1112  * tcg_qemu_tb_exec:
1113  * @env: pointer to CPUArchState for the CPU
1114  * @tb_ptr: address of generated code for the TB to execute
1115  *
1116  * Start executing code from a given translation block.
1117  * Where translation blocks have been linked, execution
1118  * may proceed from the given TB into successive ones.
1119  * Control eventually returns only when some action is needed
1120  * from the top-level loop: either control must pass to a TB
1121  * which has not yet been directly linked, or an asynchronous
1122  * event such as an interrupt needs handling.
1123  *
1124  * Return: The return value is the value passed to the corresponding
1125  * tcg_gen_exit_tb() at translation time of the last TB attempted to execute.
1126  * The value is either zero or a 4-byte aligned pointer to that TB combined
1127  * with additional information in its two least significant bits. The
1128  * additional information is encoded as follows:
1129  *  0, 1: the link between this TB and the next is via the specified
1130  *        TB index (0 or 1). That is, we left the TB via (the equivalent
1131  *        of) "goto_tb <index>". The main loop uses this to determine
1132  *        how to link the TB just executed to the next.
1133  *  2:    we are using instruction counting code generation, and we
1134  *        did not start executing this TB because the instruction counter
1135  *        would hit zero midway through it. In this case the pointer
1136  *        returned is the TB we were about to execute, and the caller must
1137  *        arrange to execute the remaining count of instructions.
1138  *  3:    we stopped because the CPU's exit_request flag was set
1139  *        (usually meaning that there is an interrupt that needs to be
1140  *        handled). The pointer returned is the TB we were about to execute
1141  *        when we noticed the pending exit request.
1142  *
1143  * If the bottom two bits indicate an exit-via-index then the CPU
1144  * state is correctly synchronised and ready for execution of the next
1145  * TB (and in particular the guest PC is the address to execute next).
1146  * Otherwise, we gave up on execution of this TB before it started, and
1147  * the caller must fix up the CPU state by calling the CPU's
1148  * synchronize_from_tb() method with the TB pointer we return (falling
1149  * back to calling the CPU's set_pc method with tb->pb if no
1150  * synchronize_from_tb() method exists).
1151  *
1152  * Note that TCG targets may use a different definition of tcg_qemu_tb_exec
1153  * to this default (which just calls the prologue.code emitted by
1154  * tcg_target_qemu_prologue()).
1155  */
1156 #define TB_EXIT_MASK      3
1157 #define TB_EXIT_IDX0      0
1158 #define TB_EXIT_IDX1      1
1159 #define TB_EXIT_IDXMAX    1
1160 #define TB_EXIT_REQUESTED 3
1161 
1162 #ifdef CONFIG_TCG_INTERPRETER
1163 uintptr_t tcg_qemu_tb_exec(CPUArchState *env, const void *tb_ptr);
1164 #else
1165 typedef uintptr_t tcg_prologue_fn(CPUArchState *env, const void *tb_ptr);
1166 extern tcg_prologue_fn *tcg_qemu_tb_exec;
1167 #endif
1168 
1169 void tcg_register_jit(const void *buf, size_t buf_size);
1170 
1171 #if TCG_TARGET_MAYBE_vec
1172 /* Return zero if the tuple (opc, type, vece) is unsupportable;
1173    return > 0 if it is directly supportable;
1174    return < 0 if we must call tcg_expand_vec_op.  */
1175 int tcg_can_emit_vec_op(TCGOpcode, TCGType, unsigned);
1176 #else
1177 static inline int tcg_can_emit_vec_op(TCGOpcode o, TCGType t, unsigned ve)
1178 {
1179     return 0;
1180 }
1181 #endif
1182 
1183 /* Expand the tuple (opc, type, vece) on the given arguments.  */
1184 void tcg_expand_vec_op(TCGOpcode, TCGType, unsigned, TCGArg, ...);
1185 
1186 /* Replicate a constant C accoring to the log2 of the element size.  */
1187 uint64_t dup_const(unsigned vece, uint64_t c);
1188 
1189 #define dup_const(VECE, C)                                         \
1190     (__builtin_constant_p(VECE)                                    \
1191      ? (  (VECE) == MO_8  ? 0x0101010101010101ull * (uint8_t)(C)   \
1192         : (VECE) == MO_16 ? 0x0001000100010001ull * (uint16_t)(C)  \
1193         : (VECE) == MO_32 ? 0x0000000100000001ull * (uint32_t)(C)  \
1194         : (VECE) == MO_64 ? (uint64_t)(C)                          \
1195         : (qemu_build_not_reached_always(), 0))                    \
1196      : dup_const(VECE, C))
1197 
1198 #if TARGET_LONG_BITS == 64
1199 # define dup_const_tl  dup_const
1200 #else
1201 # define dup_const_tl(VECE, C)                                     \
1202     (__builtin_constant_p(VECE)                                    \
1203      ? (  (VECE) == MO_8  ? 0x01010101ul * (uint8_t)(C)            \
1204         : (VECE) == MO_16 ? 0x00010001ul * (uint16_t)(C)           \
1205         : (VECE) == MO_32 ? 0x00000001ul * (uint32_t)(C)           \
1206         : (qemu_build_not_reached_always(), 0))                    \
1207      :  (target_long)dup_const(VECE, C))
1208 #endif
1209 
1210 #ifdef CONFIG_DEBUG_TCG
1211 void tcg_assert_listed_vecop(TCGOpcode);
1212 #else
1213 static inline void tcg_assert_listed_vecop(TCGOpcode op) { }
1214 #endif
1215 
1216 static inline const TCGOpcode *tcg_swap_vecop_list(const TCGOpcode *n)
1217 {
1218 #ifdef CONFIG_DEBUG_TCG
1219     const TCGOpcode *o = tcg_ctx->vecop_list;
1220     tcg_ctx->vecop_list = n;
1221     return o;
1222 #else
1223     return NULL;
1224 #endif
1225 }
1226 
1227 bool tcg_can_emit_vecop_list(const TCGOpcode *, TCGType, unsigned);
1228 
1229 #endif /* TCG_H */
1230