1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
/*
* Tiny Code Generator for QEMU
*
* Copyright ( c ) 2008 Fabrice Bellard
*
* Permission is hereby granted , free of charge , to any person obtaining a copy
* of this software and associated documentation files ( the "Software" ), to deal
* in the Software without restriction , including without limitation the rights
* to use , copy , modify , merge , publish , distribute , sublicense , and / or sell
* copies of the Software , and to permit persons to whom the Software is
* furnished to do so , subject to the following conditions :
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software .
*
* THE SOFTWARE IS PROVIDED "AS IS" , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
* IMPLIED , INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY ,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT . IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM , DAMAGES OR OTHER
* LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE , ARISING FROM ,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE .
*/
24
# include "qemu-common.h"
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
# include "tcg-target.h"
# if TCG_TARGET_REG_BITS == 32
typedef int32_t tcg_target_long ;
typedef uint32_t tcg_target_ulong ;
# define TCG_PRIlx PRIx32
# define TCG_PRIld PRId32
# elif TCG_TARGET_REG_BITS == 64
typedef int64_t tcg_target_long ;
typedef uint64_t tcg_target_ulong ;
# define TCG_PRIlx PRIx64
# define TCG_PRIld PRId64
# else
# error unsupported
# endif
# if TCG_TARGET_NB_REGS <= 32
typedef uint32_t TCGRegSet ;
# elif TCG_TARGET_NB_REGS <= 64
typedef uint64_t TCGRegSet ;
# else
# error unsupported
# endif
enum {
# define DEF ( s , n , copy_size ) INDEX_op_ ## s ,
# include "tcg-opc.h"
# undef DEF
NB_OPS ,
};
# define tcg_regset_clear ( d ) ( d ) = 0
# define tcg_regset_set ( d , s ) ( d ) = ( s )
# define tcg_regset_set32 ( d , reg , val32 ) ( d ) |= ( val32 ) << ( reg )
# define tcg_regset_set_reg ( d , r ) ( d ) |= 1 << ( r )
# define tcg_regset_reset_reg ( d , r ) ( d ) &= ~ ( 1 << ( r ))
# define tcg_regset_test_reg ( d , r ) ((( d ) >> ( r )) & 1 )
# define tcg_regset_or ( d , a , b ) ( d ) = ( a ) | ( b )
# define tcg_regset_and ( d , a , b ) ( d ) = ( a ) & ( b )
# define tcg_regset_andnot ( d , a , b ) ( d ) = ( a ) & ~ ( b )
# define tcg_regset_not ( d , a ) ( d ) = ~ ( a )
typedef struct TCGRelocation {
struct TCGRelocation * next ;
int type ;
uint8_t * ptr ;
tcg_target_long addend ;
} TCGRelocation ;
typedef struct TCGLabel {
75
int has_value ;
76
77
78
79
80
81
82
83
union {
tcg_target_ulong value ;
TCGRelocation * first_reloc ;
} u ;
} TCGLabel ;
typedef struct TCGPool {
struct TCGPool * next ;
84
85
int size ;
uint8_t data [ 0 ] __attribute__ (( aligned ));
86
87
88
89
90
91
} TCGPool ;
# define TCG_POOL_CHUNK_SIZE 32768
# define TCG_MAX_LABELS 512
92
# define TCG_MAX_TEMPS 512
93
94
95
96
97
/* when the size of the arguments of a called function is smaller than
this value , they are statically allocated in the TB stack frame */
# define TCG_STATIC_CALL_ARGS_SIZE 128
98
99
100
101
typedef int TCGType ;
# define TCG_TYPE_I32 0
# define TCG_TYPE_I64 1
102
# define TCG_TYPE_COUNT 2 /* number of different types */
103
104
105
106
107
108
109
110
111
# if TCG_TARGET_REG_BITS == 32
# define TCG_TYPE_PTR TCG_TYPE_I32
# else
# define TCG_TYPE_PTR TCG_TYPE_I64
# endif
typedef tcg_target_ulong TCGArg ;
112
113
114
115
116
117
/* Define a type and accessor macros for varables . Using a struct is
nice because it gives some level of type safely . Ideally the compiler
be able to see through all this . However in practice this is not true ,
expecially on targets with braindamaged ABIs ( e . g . i386 ).
We use plain int by default to avoid this runtime overhead .
Users of tcg_gen_ * don ' t need to know about any of this , and should
118
119
120
121
122
treat TCGv as an opaque type .
In additon we do typechecking for different types of variables . TCGv_i32
and TCGv_i64 are 32 / 64 - bit variables respectively . TCGv and TCGv_ptr
are aliases for target_ulong and host pointer sized values respectively .
*/
123
124
# ifdef CONFIG_DEBUG_TCG
125
126
# define DEBUG_TCGV 1
# endif
127
128
129
130
131
# ifdef DEBUG_TCGV
typedef struct
{
132
int i32 ;
133
} TCGv_i32 ;
134
135
136
typedef struct
{
137
int i64 ;
138
139
140
141
142
143
} TCGv_i64 ;
# define MAKE_TCGV_I32 ( i ) __extension__ \
({ TCGv_i32 make_tcgv_tmp = { i }; make_tcgv_tmp ;})
# define MAKE_TCGV_I64 ( i ) __extension__ \
({ TCGv_i64 make_tcgv_tmp = { i }; make_tcgv_tmp ;})
144
145
# define GET_TCGV_I32 ( t ) (( t ). i32 )
# define GET_TCGV_I64 ( t ) (( t ). i64 )
146
# if TCG_TARGET_REG_BITS == 32
147
148
# define TCGV_LOW ( t ) MAKE_TCGV_I32 ( GET_TCGV_I64 ( t ))
# define TCGV_HIGH ( t ) MAKE_TCGV_I32 ( GET_TCGV_I64 ( t ) + 1 )
149
150
151
152
# endif
# else /* !DEBUG_TCGV */
153
154
155
156
157
158
typedef int TCGv_i32 ;
typedef int TCGv_i64 ;
# define MAKE_TCGV_I32 ( x ) ( x )
# define MAKE_TCGV_I64 ( x ) ( x )
# define GET_TCGV_I32 ( t ) ( t )
# define GET_TCGV_I64 ( t ) ( t )
159
160
# if TCG_TARGET_REG_BITS == 32
161
# define TCGV_LOW ( t ) ( t )
162
163
164
165
166
# define TCGV_HIGH ( t ) (( t ) + 1 )
# endif
# endif /* DEBUG_TCGV */
167
168
169
# define TCGV_EQUAL_I32 ( a , b ) ( GET_TCGV_I32 ( a ) == GET_TCGV_I32 ( b ))
# define TCGV_EQUAL_I64 ( a , b ) ( GET_TCGV_I64 ( a ) == GET_TCGV_I64 ( b ))
170
/* Dummy definition to avoid compiler warnings. */
171
172
# define TCGV_UNUSED_I32 ( x ) x = MAKE_TCGV_I32 ( - 1 )
# define TCGV_UNUSED_I64 ( x ) x = MAKE_TCGV_I64 ( - 1 )
173
174
175
176
177
178
179
/* call flags */
# define TCG_CALL_TYPE_MASK 0x000f
# define TCG_CALL_TYPE_STD 0x0000 /* standard C call */
# define TCG_CALL_TYPE_REGPARM_1 0x0001 /* i386 style regparm call (1 reg) */
# define TCG_CALL_TYPE_REGPARM_2 0x0002 /* i386 style regparm call (2 regs) */
# define TCG_CALL_TYPE_REGPARM 0x0003 /* i386 style regparm call (3 regs) */
180
/* A pure function only reads its arguments and TCG global variables
181
and cannot raise exceptions . Hence a call to a pure function can be
182
183
safely suppressed if the return value is not used . */
# define TCG_CALL_PURE 0x0010
184
/* A const function only reads its arguments and does not use TCG
185
186
global variables . Hence a call to such a function does not
save TCG global variables back to their canonical location . */
187
# define TCG_CALL_CONST 0x0020
188
189
/* used to align parameters */
190
# define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32 ( - 1 )
191
192
# define TCG_CALL_DUMMY_ARG (( TCGArg )( - 1 ))
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
typedef enum {
TCG_COND_EQ ,
TCG_COND_NE ,
TCG_COND_LT ,
TCG_COND_GE ,
TCG_COND_LE ,
TCG_COND_GT ,
/* unsigned */
TCG_COND_LTU ,
TCG_COND_GEU ,
TCG_COND_LEU ,
TCG_COND_GTU ,
} TCGCond ;
# define TEMP_VAL_DEAD 0
# define TEMP_VAL_REG 1
# define TEMP_VAL_MEM 2
# define TEMP_VAL_CONST 3
/* XXX: optimize memory layout */
typedef struct TCGTemp {
TCGType base_type ;
TCGType type ;
int val_type ;
int reg ;
tcg_target_long val ;
int mem_reg ;
tcg_target_long mem_offset ;
unsigned int fixed_reg : 1 ;
unsigned int mem_coherent : 1 ;
unsigned int mem_allocated : 1 ;
224
225
226
unsigned int temp_local : 1 ; /* If true , the temp is saved accross
basic blocks . Otherwise , it is not
preserved accross basic blocks . */
227
228
229
unsigned int temp_allocated : 1 ; /* never used for code gen */
/* index of next free temp of same base type, -1 if end */
int next_free_temp ;
230
231
232
233
const char * name ;
} TCGTemp ;
typedef struct TCGHelperInfo {
234
tcg_target_ulong func ;
235
236
237
238
239
240
241
242
243
244
245
246
247
const char * name ;
} TCGHelperInfo ;
typedef struct TCGContext TCGContext ;
struct TCGContext {
uint8_t * pool_cur , * pool_end ;
TCGPool * pool_first , * pool_current ;
TCGLabel * labels ;
int nb_labels ;
TCGTemp * temps ; /* globals first, temps after */
int nb_globals ;
int nb_temps ;
248
249
/* index of free temps, -1 if none */
int first_free_temp [ TCG_TYPE_COUNT * 2 ];
250
251
252
253
254
255
256
/* goto_tb support */
uint8_t * code_buf ;
unsigned long * tb_next ;
uint16_t * tb_next_offset ;
uint16_t * tb_jmp_offset ; /* != NULL if USE_DIRECT_JUMP */
257
/* liveness analysis */
258
259
uint16_t * op_dead_iargs ; /* for each operation , each bit tells if the
corresponding input argument is dead */
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
/* tells in which temporary a given register is . It does not take
into account fixed registers */
int reg_to_temp [ TCG_TARGET_NB_REGS ];
TCGRegSet reserved_regs ;
tcg_target_long current_frame_offset ;
tcg_target_long frame_start ;
tcg_target_long frame_end ;
int frame_reg ;
uint8_t * code_ptr ;
TCGTemp static_temps [ TCG_MAX_TEMPS ];
TCGHelperInfo * helpers ;
int nb_helpers ;
int allocated_helpers ;
276
int helpers_sorted ;
277
278
279
280
281
282
283
284
285
286
287
288
289
290
# ifdef CONFIG_PROFILER
/* profiling info */
int64_t tb_count1 ;
int64_t tb_count ;
int64_t op_count ; /* total insn count */
int op_count_max ; /* max insn per TB */
int64_t temp_count ;
int temp_count_max ;
int64_t del_op_count ;
int64_t code_in_len ;
int64_t code_out_len ;
int64_t interm_time ;
int64_t code_time ;
291
int64_t const_time ;
292
293
294
295
int64_t la_time ;
int64_t restore_count ;
int64_t restore_time ;
# endif
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
};
extern TCGContext tcg_ctx ;
extern uint16_t * gen_opc_ptr ;
extern TCGArg * gen_opparam_ptr ;
extern uint16_t gen_opc_buf [];
extern TCGArg gen_opparam_buf [];
/* pool based memory allocation */
void * tcg_malloc_internal ( TCGContext * s , int size );
void tcg_pool_reset ( TCGContext * s );
void tcg_pool_delete ( TCGContext * s );
static inline void * tcg_malloc ( int size )
{
TCGContext * s = & tcg_ctx ;
uint8_t * ptr , * ptr_end ;
size = ( size + sizeof ( long ) - 1 ) & ~ ( sizeof ( long ) - 1 );
ptr = s -> pool_cur ;
ptr_end = ptr + size ;
if ( unlikely ( ptr_end > s -> pool_end )) {
return tcg_malloc_internal ( & tcg_ctx , size );
} else {
s -> pool_cur = ptr_end ;
return ptr ;
}
}
void tcg_context_init ( TCGContext * s );
void tcg_func_start ( TCGContext * s );
328
329
int tcg_gen_code ( TCGContext * s , uint8_t * gen_code_buf );
int tcg_gen_code_search_pc ( TCGContext * s , uint8_t * gen_code_buf , long offset );
330
331
332
void tcg_set_frame ( TCGContext * s , int reg ,
tcg_target_long start , tcg_target_long size );
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
TCGv_i32 tcg_global_reg_new_i32 ( int reg , const char * name );
TCGv_i32 tcg_global_mem_new_i32 ( int reg , tcg_target_long offset ,
const char * name );
TCGv_i32 tcg_temp_new_internal_i32 ( int temp_local );
static inline TCGv_i32 tcg_temp_new_i32 ( void )
{
return tcg_temp_new_internal_i32 ( 0 );
}
static inline TCGv_i32 tcg_temp_local_new_i32 ( void )
{
return tcg_temp_new_internal_i32 ( 1 );
}
void tcg_temp_free_i32 ( TCGv_i32 arg );
char * tcg_get_arg_str_i32 ( TCGContext * s , char * buf , int buf_size , TCGv_i32 arg );
TCGv_i64 tcg_global_reg_new_i64 ( int reg , const char * name );
TCGv_i64 tcg_global_mem_new_i64 ( int reg , tcg_target_long offset ,
const char * name );
TCGv_i64 tcg_temp_new_internal_i64 ( int temp_local );
static inline TCGv_i64 tcg_temp_new_i64 ( void )
354
{
355
return tcg_temp_new_internal_i64 ( 0 );
356
}
357
static inline TCGv_i64 tcg_temp_local_new_i64 ( void )
358
{
359
return tcg_temp_new_internal_i64 ( 1 );
360
}
361
362
363
void tcg_temp_free_i64 ( TCGv_i64 arg );
char * tcg_get_arg_str_i64 ( TCGContext * s , char * buf , int buf_size , TCGv_i64 arg );
364
365
void tcg_dump_info ( FILE * f ,
int ( * cpu_fprintf )( FILE * f , const char * fmt , ...));
366
367
368
369
370
371
372
# define TCG_CT_ALIAS 0x80
# define TCG_CT_IALIAS 0x40
# define TCG_CT_REG 0x01
# define TCG_CT_CONST 0x02 /* any constant of register size */
typedef struct TCGArgConstraint {
373
374
uint16_t ct ;
uint8_t alias_index ;
375
376
377
378
379
380
381
382
383
union {
TCGRegSet regs ;
} u ;
} TCGArgConstraint ;
# define TCG_MAX_OP_ARGS 16
# define TCG_OPF_BB_END 0x01 /* instruction defines the end of a basic
block */
384
385
386
387
388
# define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers
and potentially update globals . */
# define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects : it
cannot be removed if its output
are not used */
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
typedef struct TCGOpDef {
const char * name ;
uint8_t nb_oargs , nb_iargs , nb_cargs , nb_args ;
uint8_t flags ;
uint16_t copy_size ;
TCGArgConstraint * args_ct ;
int * sorted_args ;
} TCGOpDef ;
typedef struct TCGTargetOpDef {
int op ;
const char * args_ct_str [ TCG_MAX_OP_ARGS ];
} TCGTargetOpDef ;
void tcg_target_init ( TCGContext * s );
405
void tcg_target_qemu_prologue ( TCGContext * s );
406
407
408
409
410
411
412
413
414
415
416
417
418
# define tcg_abort () \
do { \
fprintf ( stderr , "%s:%d: tcg fatal error \n " , __FILE__ , __LINE__ ); \
abort (); \
} while ( 0 )
void tcg_add_target_add_op_defs ( const TCGTargetOpDef * tdefs );
# if TCG_TARGET_REG_BITS == 32
# define tcg_const_ptr tcg_const_i32
# define tcg_add_ptr tcg_add_i32
# define tcg_sub_ptr tcg_sub_i32
419
420
421
422
423
424
# define TCGv_ptr TCGv_i32
# define GET_TCGV_PTR GET_TCGV_I32
# define tcg_global_reg_new_ptr tcg_global_reg_new_i32
# define tcg_global_mem_new_ptr tcg_global_mem_new_i32
# define tcg_temp_new_ptr tcg_temp_new_i32
# define tcg_temp_free_ptr tcg_temp_free_i32
425
426
427
428
# else
# define tcg_const_ptr tcg_const_i64
# define tcg_add_ptr tcg_add_i64
# define tcg_sub_ptr tcg_sub_i64
429
430
431
432
433
434
# define TCGv_ptr TCGv_i64
# define GET_TCGV_PTR GET_TCGV_I64
# define tcg_global_reg_new_ptr tcg_global_reg_new_i64
# define tcg_global_mem_new_ptr tcg_global_mem_new_i64
# define tcg_temp_new_ptr tcg_temp_new_i64
# define tcg_temp_free_ptr tcg_temp_free_i64
435
436
# endif
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
void tcg_gen_callN ( TCGContext * s , TCGv_ptr func , unsigned int flags ,
int sizemask , TCGArg ret , int nargs , TCGArg * args );
void tcg_gen_shifti_i64 ( TCGv_i64 ret , TCGv_i64 arg1 ,
int c , int right , int arith );
/* only used for debugging purposes */
void tcg_register_helper ( void * func , const char * name );
const char * tcg_helper_get_name ( TCGContext * s , void * func );
void tcg_dump_ops ( TCGContext * s , FILE * outfile );
void dump_ops ( const uint16_t * opc_buf , const TCGArg * opparam_buf );
TCGv_i32 tcg_const_i32 ( int32_t val );
TCGv_i64 tcg_const_i64 ( int64_t val );
TCGv_i32 tcg_const_local_i32 ( int32_t val );
TCGv_i64 tcg_const_local_i64 ( int64_t val );
454
455
456
457
458
459
460
461
462
463
464
465
466
void tcg_out_reloc ( TCGContext * s , uint8_t * code_ptr , int type ,
int label_index , long addend );
const TCGArg * tcg_gen_code_op ( TCGContext * s , int opc , const TCGArg * args1 ,
unsigned int dead_iargs );
/* tcg-runtime.c */
int64_t tcg_helper_shl_i64 ( int64_t arg1 , int64_t arg2 );
int64_t tcg_helper_shr_i64 ( int64_t arg1 , int64_t arg2 );
int64_t tcg_helper_sar_i64 ( int64_t arg1 , int64_t arg2 );
int64_t tcg_helper_div_i64 ( int64_t arg1 , int64_t arg2 );
int64_t tcg_helper_rem_i64 ( int64_t arg1 , int64_t arg2 );
uint64_t tcg_helper_divu_i64 ( uint64_t arg1 , uint64_t arg2 );
uint64_t tcg_helper_remu_i64 ( uint64_t arg1 , uint64_t arg2 );
467
468
extern uint8_t code_gen_prologue [];
malc
authored
16 years ago
469
# if defined ( _ARCH_PPC ) && ! defined ( _ARCH_PPC64 )
470
# define tcg_qemu_tb_exec ( tb_ptr ) \
471
(( intptr_t REGPARM __attribute__ (( longcall )) ( * )( void * )) code_gen_prologue )( tb_ptr )
472
# else
473
# define tcg_qemu_tb_exec ( tb_ptr ) (( intptr_t REGPARM ( * )( void * )) code_gen_prologue )( tb_ptr )
474
# endif