aboutsummaryrefslogtreecommitdiff
path: root/tcg/tcg.h
blob: d0556ce963a5055d9e82b4b7ccd745279d1cde2e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
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
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
/*
 * 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.
 */
#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 {
    int has_value;
    union {
        tcg_target_ulong value;
        TCGRelocation *first_reloc;
    } u;
} TCGLabel;

typedef struct TCGPool {
    struct TCGPool *next;
    int size;
    uint8_t data[0];
} TCGPool;

#define TCG_POOL_CHUNK_SIZE 32768

#define TCG_MAX_LABELS 512

#define TCG_MAX_TEMPS 512

typedef int TCGType;

#define TCG_TYPE_I32 0
#define TCG_TYPE_I64 1

#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;

/* 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
   treat TCGv as an opaque type.  */

//#define DEBUG_TCGV 1

#ifdef DEBUG_TCGV

typedef struct
{
    int n;
} TCGv;

#define MAKE_TCGV(i) __extension__ \
  ({ TCGv make_tcgv_tmp = {i}; make_tcgv_tmp;})
#define GET_TCGV(t) ((t).n)
#if TCG_TARGET_REG_BITS == 32
#define TCGV_HIGH(t) MAKE_TCGV(GET_TCGV(t) + 1)
#endif

#else /* !DEBUG_TCGV */

typedef int TCGv;
#define MAKE_TCGV(x) (x)
#define GET_TCGV(t) (t)
#if TCG_TARGET_REG_BITS == 32
#define TCGV_HIGH(t) ((t) + 1)
#endif

#endif /* DEBUG_TCGV */

/* 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) */

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;
    const char *name;
} TCGTemp;

typedef struct TCGHelperInfo {
    void *func;
    const char *name;
} TCGHelperInfo;

typedef struct TCGContext TCGContext;

typedef void TCGMacroFunc(TCGContext *s, int macro_id, const int *dead_args);

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;
    /* constant indexes (end of temp array) */
    int const_start;
    int const_end;

    /* 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 */

    uint16_t *op_dead_iargs; /* for each operation, each bit tells if the
                                corresponding input argument is dead */
    /* 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];

    TCGMacroFunc *macro_func;
    TCGHelperInfo *helpers;
    int nb_helpers;
    int allocated_helpers;
};

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);

int dyngen_code(TCGContext *s, uint8_t *gen_code_buf);
int dyngen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);

void tcg_set_frame(TCGContext *s, int reg,
                   tcg_target_long start, tcg_target_long size);
void tcg_set_macro_func(TCGContext *s, TCGMacroFunc *func);
TCGv tcg_global_reg_new(TCGType type, int reg, const char *name);
TCGv tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset,
                        const char *name);
TCGv tcg_temp_new(TCGType type);
char *tcg_get_arg_str(TCGContext *s, char *buf, int buf_size, TCGv arg);

#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 {
    uint16_t ct;
    uint8_t alias_index;
    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 */
#define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers */
#define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects */

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;

extern TCGOpDef tcg_op_defs[];

void tcg_target_init(TCGContext *s);

#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);

void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags,
                  unsigned int nb_rets, const TCGv *rets,
                  unsigned int nb_params, const TCGv *args1);
void tcg_gen_shifti_i64(TCGv ret, TCGv arg1, 
                        int c, int right, int arith);

/* only used for debugging purposes */
void tcg_register_helper(void *func, const char *name);
#define TCG_HELPER(func) tcg_register_helper(func, #func)
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 tcg_const_i32(int32_t val);
TCGv tcg_const_i64(int64_t val);

#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
#else
#define tcg_const_ptr tcg_const_i64
#define tcg_add_ptr tcg_add_i64
#define tcg_sub_ptr tcg_sub_i64
#endif

void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type, 
                   int label_index, long addend);
void tcg_reg_alloc_start(TCGContext *s);
void tcg_reg_alloc_bb_end(TCGContext *s);
void tcg_liveness_analysis(TCGContext *s);
const TCGArg *tcg_gen_code_op(TCGContext *s, int opc, const TCGArg *args1,
                              unsigned int dead_iargs);

const TCGArg *dyngen_op(TCGContext *s, int opc, const TCGArg *opparam_ptr);

/* 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);