hw/virtio: group virtio flags into an enum
[qemu/kevin.git] / tcg / tcg.h
blobb83f76351ccdb01146f47082c3fa28fb4c2de821
1 /*
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
22 * THE SOFTWARE.
25 #ifndef TCG_H
26 #define TCG_H
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
40 # else
41 # error Unknown pointer size for tcg target
42 # endif
43 #endif
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
55 #else
56 #error unsupported
57 #endif
59 #if TCG_TARGET_NB_REGS <= 32
60 typedef uint32_t TCGRegSet;
61 #elif TCG_TARGET_NB_REGS <= 64
62 typedef uint64_t TCGRegSet;
63 #else
64 #error unsupported
65 #endif
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
102 #endif
104 #ifndef TCG_TARGET_deposit_i32_valid
105 #define TCG_TARGET_deposit_i32_valid(ofs, len) 1
106 #endif
107 #ifndef TCG_TARGET_deposit_i64_valid
108 #define TCG_TARGET_deposit_i64_valid(ofs, len) 1
109 #endif
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
117 #endif
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
123 #endif
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"
130 #endif
132 #ifndef TARGET_INSN_START_EXTRA_WORDS
133 # define TARGET_INSN_START_WORDS 1
134 #else
135 # define TARGET_INSN_START_WORDS (1 + TARGET_INSN_START_EXTRA_WORDS)
136 #endif
138 typedef enum TCGOpcode {
139 #define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
140 #include "tcg-opc.h"
141 #undef DEF
142 NB_OPS,
143 } TCGOpcode;
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;
166 #else
167 /* The port better have done this. */
168 #endif
171 typedef struct TCGRelocation {
172 struct TCGRelocation *next;
173 int type;
174 tcg_insn_unit *ptr;
175 intptr_t addend;
176 } TCGRelocation;
178 typedef struct TCGLabel {
179 unsigned has_value : 1;
180 unsigned id : 31;
181 union {
182 uintptr_t value;
183 tcg_insn_unit *value_ptr;
184 TCGRelocation *first_reloc;
185 } u;
186 } TCGLabel;
188 typedef struct TCGPool {
189 struct TCGPool *next;
190 int size;
191 uint8_t data[0] __attribute__ ((aligned));
192 } TCGPool;
194 #define TCG_POOL_CHUNK_SIZE 32768
196 #define TCG_MAX_TEMPS 512
197 #define TCG_MAX_INSNS 512
199 /* when the size of the arguments of a called function is smaller than
200 this value, they are statically allocated in the TB stack frame */
201 #define TCG_STATIC_CALL_ARGS_SIZE 128
203 typedef enum TCGType {
204 TCG_TYPE_I32,
205 TCG_TYPE_I64,
206 TCG_TYPE_COUNT, /* number of different types */
208 /* An alias for the size of the host register. */
209 #if TCG_TARGET_REG_BITS == 32
210 TCG_TYPE_REG = TCG_TYPE_I32,
211 #else
212 TCG_TYPE_REG = TCG_TYPE_I64,
213 #endif
215 /* An alias for the size of the native pointer. */
216 #if UINTPTR_MAX == UINT32_MAX
217 TCG_TYPE_PTR = TCG_TYPE_I32,
218 #else
219 TCG_TYPE_PTR = TCG_TYPE_I64,
220 #endif
222 /* An alias for the size of the target "long", aka register. */
223 #if TARGET_LONG_BITS == 64
224 TCG_TYPE_TL = TCG_TYPE_I64,
225 #else
226 TCG_TYPE_TL = TCG_TYPE_I32,
227 #endif
228 } TCGType;
230 /* Constants for qemu_ld and qemu_st for the Memory Operation field. */
231 typedef enum TCGMemOp {
232 MO_8 = 0,
233 MO_16 = 1,
234 MO_32 = 2,
235 MO_64 = 3,
236 MO_SIZE = 3, /* Mask for the above. */
238 MO_SIGN = 4, /* Sign-extended, otherwise zero-extended. */
240 MO_BSWAP = 8, /* Host reverse endian. */
241 #ifdef HOST_WORDS_BIGENDIAN
242 MO_LE = MO_BSWAP,
243 MO_BE = 0,
244 #else
245 MO_LE = 0,
246 MO_BE = MO_BSWAP,
247 #endif
248 #ifdef TARGET_WORDS_BIGENDIAN
249 MO_TE = MO_BE,
250 #else
251 MO_TE = MO_LE,
252 #endif
254 /* MO_UNALN accesses are never checked for alignment.
255 MO_ALIGN accesses will result in a call to the CPU's
256 do_unaligned_access hook if the guest address is not aligned.
257 The default depends on whether the target CPU defines ALIGNED_ONLY. */
258 MO_AMASK = 16,
259 #ifdef ALIGNED_ONLY
260 MO_ALIGN = 0,
261 MO_UNALN = MO_AMASK,
262 #else
263 MO_ALIGN = MO_AMASK,
264 MO_UNALN = 0,
265 #endif
267 /* Combinations of the above, for ease of use. */
268 MO_UB = MO_8,
269 MO_UW = MO_16,
270 MO_UL = MO_32,
271 MO_SB = MO_SIGN | MO_8,
272 MO_SW = MO_SIGN | MO_16,
273 MO_SL = MO_SIGN | MO_32,
274 MO_Q = MO_64,
276 MO_LEUW = MO_LE | MO_UW,
277 MO_LEUL = MO_LE | MO_UL,
278 MO_LESW = MO_LE | MO_SW,
279 MO_LESL = MO_LE | MO_SL,
280 MO_LEQ = MO_LE | MO_Q,
282 MO_BEUW = MO_BE | MO_UW,
283 MO_BEUL = MO_BE | MO_UL,
284 MO_BESW = MO_BE | MO_SW,
285 MO_BESL = MO_BE | MO_SL,
286 MO_BEQ = MO_BE | MO_Q,
288 MO_TEUW = MO_TE | MO_UW,
289 MO_TEUL = MO_TE | MO_UL,
290 MO_TESW = MO_TE | MO_SW,
291 MO_TESL = MO_TE | MO_SL,
292 MO_TEQ = MO_TE | MO_Q,
294 MO_SSIZE = MO_SIZE | MO_SIGN,
295 } TCGMemOp;
297 typedef tcg_target_ulong TCGArg;
299 /* Define a type and accessor macros for variables. Using pointer types
300 is nice because it gives some level of type safely. Converting to and
301 from intptr_t rather than int reduces the number of sign-extension
302 instructions that get implied on 64-bit hosts. Users of tcg_gen_* don't
303 need to know about any of this, and should treat TCGv as an opaque type.
304 In addition we do typechecking for different types of variables. TCGv_i32
305 and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
306 are aliases for target_ulong and host pointer sized values respectively. */
308 typedef struct TCGv_i32_d *TCGv_i32;
309 typedef struct TCGv_i64_d *TCGv_i64;
310 typedef struct TCGv_ptr_d *TCGv_ptr;
311 typedef TCGv_ptr TCGv_env;
312 #if TARGET_LONG_BITS == 32
313 #define TCGv TCGv_i32
314 #elif TARGET_LONG_BITS == 64
315 #define TCGv TCGv_i64
316 #else
317 #error Unhandled TARGET_LONG_BITS value
318 #endif
320 static inline TCGv_i32 QEMU_ARTIFICIAL MAKE_TCGV_I32(intptr_t i)
322 return (TCGv_i32)i;
325 static inline TCGv_i64 QEMU_ARTIFICIAL MAKE_TCGV_I64(intptr_t i)
327 return (TCGv_i64)i;
330 static inline TCGv_ptr QEMU_ARTIFICIAL MAKE_TCGV_PTR(intptr_t i)
332 return (TCGv_ptr)i;
335 static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_I32(TCGv_i32 t)
337 return (intptr_t)t;
340 static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_I64(TCGv_i64 t)
342 return (intptr_t)t;
345 static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_PTR(TCGv_ptr t)
347 return (intptr_t)t;
350 #if TCG_TARGET_REG_BITS == 32
351 #define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
352 #define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
353 #endif
355 #define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
356 #define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
357 #define TCGV_EQUAL_PTR(a, b) (GET_TCGV_PTR(a) == GET_TCGV_PTR(b))
359 /* Dummy definition to avoid compiler warnings. */
360 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
361 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
362 #define TCGV_UNUSED_PTR(x) x = MAKE_TCGV_PTR(-1)
364 #define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
365 #define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
366 #define TCGV_IS_UNUSED_PTR(x) (GET_TCGV_PTR(x) == -1)
368 /* call flags */
369 /* Helper does not read globals (either directly or through an exception). It
370 implies TCG_CALL_NO_WRITE_GLOBALS. */
371 #define TCG_CALL_NO_READ_GLOBALS 0x0010
372 /* Helper does not write globals */
373 #define TCG_CALL_NO_WRITE_GLOBALS 0x0020
374 /* Helper can be safely suppressed if the return value is not used. */
375 #define TCG_CALL_NO_SIDE_EFFECTS 0x0040
377 /* convenience version of most used call flags */
378 #define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS
379 #define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS
380 #define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS
381 #define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
382 #define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
384 /* used to align parameters */
385 #define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
386 #define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
388 /* Conditions. Note that these are laid out for easy manipulation by
389 the functions below:
390 bit 0 is used for inverting;
391 bit 1 is signed,
392 bit 2 is unsigned,
393 bit 3 is used with bit 0 for swapping signed/unsigned. */
394 typedef enum {
395 /* non-signed */
396 TCG_COND_NEVER = 0 | 0 | 0 | 0,
397 TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
398 TCG_COND_EQ = 8 | 0 | 0 | 0,
399 TCG_COND_NE = 8 | 0 | 0 | 1,
400 /* signed */
401 TCG_COND_LT = 0 | 0 | 2 | 0,
402 TCG_COND_GE = 0 | 0 | 2 | 1,
403 TCG_COND_LE = 8 | 0 | 2 | 0,
404 TCG_COND_GT = 8 | 0 | 2 | 1,
405 /* unsigned */
406 TCG_COND_LTU = 0 | 4 | 0 | 0,
407 TCG_COND_GEU = 0 | 4 | 0 | 1,
408 TCG_COND_LEU = 8 | 4 | 0 | 0,
409 TCG_COND_GTU = 8 | 4 | 0 | 1,
410 } TCGCond;
412 /* Invert the sense of the comparison. */
413 static inline TCGCond tcg_invert_cond(TCGCond c)
415 return (TCGCond)(c ^ 1);
418 /* Swap the operands in a comparison. */
419 static inline TCGCond tcg_swap_cond(TCGCond c)
421 return c & 6 ? (TCGCond)(c ^ 9) : c;
424 /* Create an "unsigned" version of a "signed" comparison. */
425 static inline TCGCond tcg_unsigned_cond(TCGCond c)
427 return c & 2 ? (TCGCond)(c ^ 6) : c;
430 /* Must a comparison be considered unsigned? */
431 static inline bool is_unsigned_cond(TCGCond c)
433 return (c & 4) != 0;
436 /* Create a "high" version of a double-word comparison.
437 This removes equality from a LTE or GTE comparison. */
438 static inline TCGCond tcg_high_cond(TCGCond c)
440 switch (c) {
441 case TCG_COND_GE:
442 case TCG_COND_LE:
443 case TCG_COND_GEU:
444 case TCG_COND_LEU:
445 return (TCGCond)(c ^ 8);
446 default:
447 return c;
451 typedef enum TCGTempVal {
452 TEMP_VAL_DEAD,
453 TEMP_VAL_REG,
454 TEMP_VAL_MEM,
455 TEMP_VAL_CONST,
456 } TCGTempVal;
458 typedef struct TCGTemp {
459 TCGReg reg:8;
460 TCGTempVal val_type:8;
461 TCGType base_type:8;
462 TCGType type:8;
463 unsigned int fixed_reg:1;
464 unsigned int indirect_reg:1;
465 unsigned int indirect_base:1;
466 unsigned int mem_coherent:1;
467 unsigned int mem_allocated:1;
468 unsigned int temp_local:1; /* If true, the temp is saved across
469 basic blocks. Otherwise, it is not
470 preserved across basic blocks. */
471 unsigned int temp_allocated:1; /* never used for code gen */
473 tcg_target_long val;
474 struct TCGTemp *mem_base;
475 intptr_t mem_offset;
476 const char *name;
477 } TCGTemp;
479 typedef struct TCGContext TCGContext;
481 typedef struct TCGTempSet {
482 unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)];
483 } TCGTempSet;
485 typedef struct TCGOp {
486 TCGOpcode opc : 8;
488 /* The number of out and in parameter for a call. */
489 unsigned callo : 2;
490 unsigned calli : 6;
492 /* Index of the arguments for this op, or -1 for zero-operand ops. */
493 signed args : 16;
495 /* Index of the prex/next op, or -1 for the end of the list. */
496 signed prev : 16;
497 signed next : 16;
498 } TCGOp;
500 QEMU_BUILD_BUG_ON(NB_OPS > 0xff);
501 QEMU_BUILD_BUG_ON(OPC_BUF_SIZE >= 0x7fff);
502 QEMU_BUILD_BUG_ON(OPPARAM_BUF_SIZE >= 0x7fff);
504 struct TCGContext {
505 uint8_t *pool_cur, *pool_end;
506 TCGPool *pool_first, *pool_current, *pool_first_large;
507 int nb_labels;
508 int nb_globals;
509 int nb_temps;
511 /* goto_tb support */
512 tcg_insn_unit *code_buf;
513 uintptr_t *tb_next;
514 uint16_t *tb_next_offset;
515 uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
517 /* liveness analysis */
518 uint16_t *op_dead_args; /* for each operation, each bit tells if the
519 corresponding argument is dead */
520 uint8_t *op_sync_args; /* for each operation, each bit tells if the
521 corresponding output argument needs to be
522 sync to memory. */
524 TCGRegSet reserved_regs;
525 intptr_t current_frame_offset;
526 intptr_t frame_start;
527 intptr_t frame_end;
528 TCGTemp *frame_temp;
530 tcg_insn_unit *code_ptr;
532 GHashTable *helpers;
534 #ifdef CONFIG_PROFILER
535 /* profiling info */
536 int64_t tb_count1;
537 int64_t tb_count;
538 int64_t op_count; /* total insn count */
539 int op_count_max; /* max insn per TB */
540 int64_t temp_count;
541 int temp_count_max;
542 int64_t del_op_count;
543 int64_t code_in_len;
544 int64_t code_out_len;
545 int64_t search_out_len;
546 int64_t interm_time;
547 int64_t code_time;
548 int64_t la_time;
549 int64_t opt_time;
550 int64_t restore_count;
551 int64_t restore_time;
552 #endif
554 #ifdef CONFIG_DEBUG_TCG
555 int temps_in_use;
556 int goto_tb_issue_mask;
557 #endif
559 int gen_first_op_idx;
560 int gen_last_op_idx;
561 int gen_next_op_idx;
562 int gen_next_parm_idx;
564 /* Code generation. Note that we specifically do not use tcg_insn_unit
565 here, because there's too much arithmetic throughout that relies
566 on addition and subtraction working on bytes. Rely on the GCC
567 extension that allows arithmetic on void*. */
568 int code_gen_max_blocks;
569 void *code_gen_prologue;
570 void *code_gen_buffer;
571 size_t code_gen_buffer_size;
572 void *code_gen_ptr;
574 /* Threshold to flush the translated code buffer. */
575 void *code_gen_highwater;
577 TBContext tb_ctx;
579 /* The TCGBackendData structure is private to tcg-target.inc.c. */
580 struct TCGBackendData *be;
582 TCGTempSet free_temps[TCG_TYPE_COUNT * 2];
583 TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
585 /* Tells which temporary holds a given register.
586 It does not take into account fixed registers */
587 TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS];
589 TCGOp gen_op_buf[OPC_BUF_SIZE];
590 TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
592 uint16_t gen_insn_end_off[TCG_MAX_INSNS];
593 target_ulong gen_insn_data[TCG_MAX_INSNS][TARGET_INSN_START_WORDS];
596 extern TCGContext tcg_ctx;
598 /* The number of opcodes emitted so far. */
599 static inline int tcg_op_buf_count(void)
601 return tcg_ctx.gen_next_op_idx;
604 /* Test for whether to terminate the TB for using too many opcodes. */
605 static inline bool tcg_op_buf_full(void)
607 return tcg_op_buf_count() >= OPC_MAX_SIZE;
610 /* pool based memory allocation */
612 void *tcg_malloc_internal(TCGContext *s, int size);
613 void tcg_pool_reset(TCGContext *s);
614 void tcg_pool_delete(TCGContext *s);
616 void tb_lock(void);
617 void tb_unlock(void);
618 void tb_lock_reset(void);
620 static inline void *tcg_malloc(int size)
622 TCGContext *s = &tcg_ctx;
623 uint8_t *ptr, *ptr_end;
624 size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
625 ptr = s->pool_cur;
626 ptr_end = ptr + size;
627 if (unlikely(ptr_end > s->pool_end)) {
628 return tcg_malloc_internal(&tcg_ctx, size);
629 } else {
630 s->pool_cur = ptr_end;
631 return ptr;
635 void tcg_context_init(TCGContext *s);
636 void tcg_prologue_init(TCGContext *s);
637 void tcg_func_start(TCGContext *s);
639 int tcg_gen_code(TCGContext *s, tcg_insn_unit *gen_code_buf);
641 void tcg_set_frame(TCGContext *s, TCGReg reg, intptr_t start, intptr_t size);
643 int tcg_global_mem_new_internal(TCGType, TCGv_ptr, intptr_t, const char *);
645 TCGv_i32 tcg_global_reg_new_i32(TCGReg reg, const char *name);
646 TCGv_i64 tcg_global_reg_new_i64(TCGReg reg, const char *name);
648 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
649 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
651 void tcg_temp_free_i32(TCGv_i32 arg);
652 void tcg_temp_free_i64(TCGv_i64 arg);
654 static inline TCGv_i32 tcg_global_mem_new_i32(TCGv_ptr reg, intptr_t offset,
655 const char *name)
657 int idx = tcg_global_mem_new_internal(TCG_TYPE_I32, reg, offset, name);
658 return MAKE_TCGV_I32(idx);
661 static inline TCGv_i32 tcg_temp_new_i32(void)
663 return tcg_temp_new_internal_i32(0);
666 static inline TCGv_i32 tcg_temp_local_new_i32(void)
668 return tcg_temp_new_internal_i32(1);
671 static inline TCGv_i64 tcg_global_mem_new_i64(TCGv_ptr reg, intptr_t offset,
672 const char *name)
674 int idx = tcg_global_mem_new_internal(TCG_TYPE_I64, reg, offset, name);
675 return MAKE_TCGV_I64(idx);
678 static inline TCGv_i64 tcg_temp_new_i64(void)
680 return tcg_temp_new_internal_i64(0);
683 static inline TCGv_i64 tcg_temp_local_new_i64(void)
685 return tcg_temp_new_internal_i64(1);
688 #if defined(CONFIG_DEBUG_TCG)
689 /* If you call tcg_clear_temp_count() at the start of a section of
690 * code which is not supposed to leak any TCG temporaries, then
691 * calling tcg_check_temp_count() at the end of the section will
692 * return 1 if the section did in fact leak a temporary.
694 void tcg_clear_temp_count(void);
695 int tcg_check_temp_count(void);
696 #else
697 #define tcg_clear_temp_count() do { } while (0)
698 #define tcg_check_temp_count() 0
699 #endif
701 void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
702 void tcg_dump_op_count(FILE *f, fprintf_function cpu_fprintf);
704 #define TCG_CT_ALIAS 0x80
705 #define TCG_CT_IALIAS 0x40
706 #define TCG_CT_REG 0x01
707 #define TCG_CT_CONST 0x02 /* any constant of register size */
709 typedef struct TCGArgConstraint {
710 uint16_t ct;
711 uint8_t alias_index;
712 union {
713 TCGRegSet regs;
714 } u;
715 } TCGArgConstraint;
717 #define TCG_MAX_OP_ARGS 16
719 /* Bits for TCGOpDef->flags, 8 bits available. */
720 enum {
721 /* Instruction defines the end of a basic block. */
722 TCG_OPF_BB_END = 0x01,
723 /* Instruction clobbers call registers and potentially update globals. */
724 TCG_OPF_CALL_CLOBBER = 0x02,
725 /* Instruction has side effects: it cannot be removed if its outputs
726 are not used, and might trigger exceptions. */
727 TCG_OPF_SIDE_EFFECTS = 0x04,
728 /* Instruction operands are 64-bits (otherwise 32-bits). */
729 TCG_OPF_64BIT = 0x08,
730 /* Instruction is optional and not implemented by the host, or insn
731 is generic and should not be implemened by the host. */
732 TCG_OPF_NOT_PRESENT = 0x10,
735 typedef struct TCGOpDef {
736 const char *name;
737 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
738 uint8_t flags;
739 TCGArgConstraint *args_ct;
740 int *sorted_args;
741 #if defined(CONFIG_DEBUG_TCG)
742 int used;
743 #endif
744 } TCGOpDef;
746 extern TCGOpDef tcg_op_defs[];
747 extern const size_t tcg_op_defs_max;
749 typedef struct TCGTargetOpDef {
750 TCGOpcode op;
751 const char *args_ct_str[TCG_MAX_OP_ARGS];
752 } TCGTargetOpDef;
754 #define tcg_abort() \
755 do {\
756 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
757 abort();\
758 } while (0)
760 #ifdef CONFIG_DEBUG_TCG
761 # define tcg_debug_assert(X) do { assert(X); } while (0)
762 #elif QEMU_GNUC_PREREQ(4, 5)
763 # define tcg_debug_assert(X) \
764 do { if (!(X)) { __builtin_unreachable(); } } while (0)
765 #else
766 # define tcg_debug_assert(X) do { (void)(X); } while (0)
767 #endif
769 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
771 #if UINTPTR_MAX == UINT32_MAX
772 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
773 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
775 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((intptr_t)(V)))
776 #define tcg_global_reg_new_ptr(R, N) \
777 TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
778 #define tcg_global_mem_new_ptr(R, O, N) \
779 TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
780 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
781 #define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
782 #else
783 #define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
784 #define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
786 #define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((intptr_t)(V)))
787 #define tcg_global_reg_new_ptr(R, N) \
788 TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
789 #define tcg_global_mem_new_ptr(R, O, N) \
790 TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
791 #define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
792 #define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
793 #endif
795 void tcg_gen_callN(TCGContext *s, void *func,
796 TCGArg ret, int nargs, TCGArg *args);
798 void tcg_op_remove(TCGContext *s, TCGOp *op);
799 void tcg_optimize(TCGContext *s);
801 /* only used for debugging purposes */
802 void tcg_dump_ops(TCGContext *s);
804 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
805 TCGv_i32 tcg_const_i32(int32_t val);
806 TCGv_i64 tcg_const_i64(int64_t val);
807 TCGv_i32 tcg_const_local_i32(int32_t val);
808 TCGv_i64 tcg_const_local_i64(int64_t val);
810 TCGLabel *gen_new_label(void);
813 * label_arg
814 * @l: label
816 * Encode a label for storage in the TCG opcode stream.
819 static inline TCGArg label_arg(TCGLabel *l)
821 return (uintptr_t)l;
825 * arg_label
826 * @i: value
828 * The opposite of label_arg. Retrieve a label from the
829 * encoding of the TCG opcode stream.
832 static inline TCGLabel *arg_label(TCGArg i)
834 return (TCGLabel *)(uintptr_t)i;
838 * tcg_ptr_byte_diff
839 * @a, @b: addresses to be differenced
841 * There are many places within the TCG backends where we need a byte
842 * difference between two pointers. While this can be accomplished
843 * with local casting, it's easy to get wrong -- especially if one is
844 * concerned with the signedness of the result.
846 * This version relies on GCC's void pointer arithmetic to get the
847 * correct result.
850 static inline ptrdiff_t tcg_ptr_byte_diff(void *a, void *b)
852 return a - b;
856 * tcg_pcrel_diff
857 * @s: the tcg context
858 * @target: address of the target
860 * Produce a pc-relative difference, from the current code_ptr
861 * to the destination address.
864 static inline ptrdiff_t tcg_pcrel_diff(TCGContext *s, void *target)
866 return tcg_ptr_byte_diff(target, s->code_ptr);
870 * tcg_current_code_size
871 * @s: the tcg context
873 * Compute the current code size within the translation block.
874 * This is used to fill in qemu's data structures for goto_tb.
877 static inline size_t tcg_current_code_size(TCGContext *s)
879 return tcg_ptr_byte_diff(s->code_ptr, s->code_buf);
882 /* Combine the TCGMemOp and mmu_idx parameters into a single value. */
883 typedef uint32_t TCGMemOpIdx;
886 * make_memop_idx
887 * @op: memory operation
888 * @idx: mmu index
890 * Encode these values into a single parameter.
892 static inline TCGMemOpIdx make_memop_idx(TCGMemOp op, unsigned idx)
894 tcg_debug_assert(idx <= 15);
895 return (op << 4) | idx;
899 * get_memop
900 * @oi: combined op/idx parameter
902 * Extract the memory operation from the combined value.
904 static inline TCGMemOp get_memop(TCGMemOpIdx oi)
906 return oi >> 4;
910 * get_mmuidx
911 * @oi: combined op/idx parameter
913 * Extract the mmu index from the combined value.
915 static inline unsigned get_mmuidx(TCGMemOpIdx oi)
917 return oi & 15;
921 * tcg_qemu_tb_exec:
922 * @env: CPUArchState * for the CPU
923 * @tb_ptr: address of generated code for the TB to execute
925 * Start executing code from a given translation block.
926 * Where translation blocks have been linked, execution
927 * may proceed from the given TB into successive ones.
928 * Control eventually returns only when some action is needed
929 * from the top-level loop: either control must pass to a TB
930 * which has not yet been directly linked, or an asynchronous
931 * event such as an interrupt needs handling.
933 * The return value is a pointer to the next TB to execute
934 * (if known; otherwise zero). This pointer is assumed to be
935 * 4-aligned, and the bottom two bits are used to return further
936 * information:
937 * 0, 1: the link between this TB and the next is via the specified
938 * TB index (0 or 1). That is, we left the TB via (the equivalent
939 * of) "goto_tb <index>". The main loop uses this to determine
940 * how to link the TB just executed to the next.
941 * 2: we are using instruction counting code generation, and we
942 * did not start executing this TB because the instruction counter
943 * would hit zero midway through it. In this case the next-TB pointer
944 * returned is the TB we were about to execute, and the caller must
945 * arrange to execute the remaining count of instructions.
946 * 3: we stopped because the CPU's exit_request flag was set
947 * (usually meaning that there is an interrupt that needs to be
948 * handled). The next-TB pointer returned is the TB we were
949 * about to execute when we noticed the pending exit request.
951 * If the bottom two bits indicate an exit-via-index then the CPU
952 * state is correctly synchronised and ready for execution of the next
953 * TB (and in particular the guest PC is the address to execute next).
954 * Otherwise, we gave up on execution of this TB before it started, and
955 * the caller must fix up the CPU state by calling the CPU's
956 * synchronize_from_tb() method with the next-TB pointer we return (falling
957 * back to calling the CPU's set_pc method with tb->pb if no
958 * synchronize_from_tb() method exists).
960 * Note that TCG targets may use a different definition of tcg_qemu_tb_exec
961 * to this default (which just calls the prologue.code emitted by
962 * tcg_target_qemu_prologue()).
964 #define TB_EXIT_MASK 3
965 #define TB_EXIT_IDX0 0
966 #define TB_EXIT_IDX1 1
967 #define TB_EXIT_ICOUNT_EXPIRED 2
968 #define TB_EXIT_REQUESTED 3
970 #ifdef HAVE_TCG_QEMU_TB_EXEC
971 uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr);
972 #else
973 # define tcg_qemu_tb_exec(env, tb_ptr) \
974 ((uintptr_t (*)(void *, void *))tcg_ctx.code_gen_prologue)(env, tb_ptr)
975 #endif
977 void tcg_register_jit(void *buf, size_t buf_size);
980 * Memory helpers that will be used by TCG generated code.
982 #ifdef CONFIG_SOFTMMU
983 /* Value zero-extended to tcg register size. */
984 tcg_target_ulong helper_ret_ldub_mmu(CPUArchState *env, target_ulong addr,
985 TCGMemOpIdx oi, uintptr_t retaddr);
986 tcg_target_ulong helper_le_lduw_mmu(CPUArchState *env, target_ulong addr,
987 TCGMemOpIdx oi, uintptr_t retaddr);
988 tcg_target_ulong helper_le_ldul_mmu(CPUArchState *env, target_ulong addr,
989 TCGMemOpIdx oi, uintptr_t retaddr);
990 uint64_t helper_le_ldq_mmu(CPUArchState *env, target_ulong addr,
991 TCGMemOpIdx oi, uintptr_t retaddr);
992 tcg_target_ulong helper_be_lduw_mmu(CPUArchState *env, target_ulong addr,
993 TCGMemOpIdx oi, uintptr_t retaddr);
994 tcg_target_ulong helper_be_ldul_mmu(CPUArchState *env, target_ulong addr,
995 TCGMemOpIdx oi, uintptr_t retaddr);
996 uint64_t helper_be_ldq_mmu(CPUArchState *env, target_ulong addr,
997 TCGMemOpIdx oi, uintptr_t retaddr);
999 /* Value sign-extended to tcg register size. */
1000 tcg_target_ulong helper_ret_ldsb_mmu(CPUArchState *env, target_ulong addr,
1001 TCGMemOpIdx oi, uintptr_t retaddr);
1002 tcg_target_ulong helper_le_ldsw_mmu(CPUArchState *env, target_ulong addr,
1003 TCGMemOpIdx oi, uintptr_t retaddr);
1004 tcg_target_ulong helper_le_ldsl_mmu(CPUArchState *env, target_ulong addr,
1005 TCGMemOpIdx oi, uintptr_t retaddr);
1006 tcg_target_ulong helper_be_ldsw_mmu(CPUArchState *env, target_ulong addr,
1007 TCGMemOpIdx oi, uintptr_t retaddr);
1008 tcg_target_ulong helper_be_ldsl_mmu(CPUArchState *env, target_ulong addr,
1009 TCGMemOpIdx oi, uintptr_t retaddr);
1011 void helper_ret_stb_mmu(CPUArchState *env, target_ulong addr, uint8_t val,
1012 TCGMemOpIdx oi, uintptr_t retaddr);
1013 void helper_le_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
1014 TCGMemOpIdx oi, uintptr_t retaddr);
1015 void helper_le_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
1016 TCGMemOpIdx oi, uintptr_t retaddr);
1017 void helper_le_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
1018 TCGMemOpIdx oi, uintptr_t retaddr);
1019 void helper_be_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
1020 TCGMemOpIdx oi, uintptr_t retaddr);
1021 void helper_be_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
1022 TCGMemOpIdx oi, uintptr_t retaddr);
1023 void helper_be_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
1024 TCGMemOpIdx oi, uintptr_t retaddr);
1026 uint8_t helper_ret_ldb_cmmu(CPUArchState *env, target_ulong addr,
1027 TCGMemOpIdx oi, uintptr_t retaddr);
1028 uint16_t helper_le_ldw_cmmu(CPUArchState *env, target_ulong addr,
1029 TCGMemOpIdx oi, uintptr_t retaddr);
1030 uint32_t helper_le_ldl_cmmu(CPUArchState *env, target_ulong addr,
1031 TCGMemOpIdx oi, uintptr_t retaddr);
1032 uint64_t helper_le_ldq_cmmu(CPUArchState *env, target_ulong addr,
1033 TCGMemOpIdx oi, uintptr_t retaddr);
1034 uint16_t helper_be_ldw_cmmu(CPUArchState *env, target_ulong addr,
1035 TCGMemOpIdx oi, uintptr_t retaddr);
1036 uint32_t helper_be_ldl_cmmu(CPUArchState *env, target_ulong addr,
1037 TCGMemOpIdx oi, uintptr_t retaddr);
1038 uint64_t helper_be_ldq_cmmu(CPUArchState *env, target_ulong addr,
1039 TCGMemOpIdx oi, uintptr_t retaddr);
1041 /* Temporary aliases until backends are converted. */
1042 #ifdef TARGET_WORDS_BIGENDIAN
1043 # define helper_ret_ldsw_mmu helper_be_ldsw_mmu
1044 # define helper_ret_lduw_mmu helper_be_lduw_mmu
1045 # define helper_ret_ldsl_mmu helper_be_ldsl_mmu
1046 # define helper_ret_ldul_mmu helper_be_ldul_mmu
1047 # define helper_ret_ldl_mmu helper_be_ldul_mmu
1048 # define helper_ret_ldq_mmu helper_be_ldq_mmu
1049 # define helper_ret_stw_mmu helper_be_stw_mmu
1050 # define helper_ret_stl_mmu helper_be_stl_mmu
1051 # define helper_ret_stq_mmu helper_be_stq_mmu
1052 # define helper_ret_ldw_cmmu helper_be_ldw_cmmu
1053 # define helper_ret_ldl_cmmu helper_be_ldl_cmmu
1054 # define helper_ret_ldq_cmmu helper_be_ldq_cmmu
1055 #else
1056 # define helper_ret_ldsw_mmu helper_le_ldsw_mmu
1057 # define helper_ret_lduw_mmu helper_le_lduw_mmu
1058 # define helper_ret_ldsl_mmu helper_le_ldsl_mmu
1059 # define helper_ret_ldul_mmu helper_le_ldul_mmu
1060 # define helper_ret_ldl_mmu helper_le_ldul_mmu
1061 # define helper_ret_ldq_mmu helper_le_ldq_mmu
1062 # define helper_ret_stw_mmu helper_le_stw_mmu
1063 # define helper_ret_stl_mmu helper_le_stl_mmu
1064 # define helper_ret_stq_mmu helper_le_stq_mmu
1065 # define helper_ret_ldw_cmmu helper_le_ldw_cmmu
1066 # define helper_ret_ldl_cmmu helper_le_ldl_cmmu
1067 # define helper_ret_ldq_cmmu helper_le_ldq_cmmu
1068 #endif
1070 #endif /* CONFIG_SOFTMMU */
1072 #endif /* TCG_H */