alpha-linux-user: Add correct sigaction constants.
[qemu/aliguori-queue.git] / tcg / tcg.h
blob44856e1dd55cb85d15890581dd4290085bd0e200
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.
24 #include "qemu-common.h"
25 #include "tcg-target.h"
26 #include "tcg-runtime.h"
28 #if TCG_TARGET_REG_BITS == 32
29 typedef int32_t tcg_target_long;
30 typedef uint32_t tcg_target_ulong;
31 #define TCG_PRIlx PRIx32
32 #define TCG_PRIld PRId32
33 #elif TCG_TARGET_REG_BITS == 64
34 typedef int64_t tcg_target_long;
35 typedef uint64_t tcg_target_ulong;
36 #define TCG_PRIlx PRIx64
37 #define TCG_PRIld PRId64
38 #else
39 #error unsupported
40 #endif
42 #if TCG_TARGET_NB_REGS <= 32
43 typedef uint32_t TCGRegSet;
44 #elif TCG_TARGET_NB_REGS <= 64
45 typedef uint64_t TCGRegSet;
46 #else
47 #error unsupported
48 #endif
50 typedef enum TCGOpcode {
51 #define DEF(s, n, copy_size) INDEX_op_ ## s,
52 #include "tcg-opc.h"
53 #undef DEF
54 NB_OPS,
55 } TCGOpcode;
57 #define tcg_regset_clear(d) (d) = 0
58 #define tcg_regset_set(d, s) (d) = (s)
59 #define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
60 #define tcg_regset_set_reg(d, r) (d) |= 1L << (r)
61 #define tcg_regset_reset_reg(d, r) (d) &= ~(1L << (r))
62 #define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
63 #define tcg_regset_or(d, a, b) (d) = (a) | (b)
64 #define tcg_regset_and(d, a, b) (d) = (a) & (b)
65 #define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
66 #define tcg_regset_not(d, a) (d) = ~(a)
68 typedef struct TCGRelocation {
69 struct TCGRelocation *next;
70 int type;
71 uint8_t *ptr;
72 tcg_target_long addend;
73 } TCGRelocation;
75 typedef struct TCGLabel {
76 int has_value;
77 union {
78 tcg_target_ulong value;
79 TCGRelocation *first_reloc;
80 } u;
81 } TCGLabel;
83 typedef struct TCGPool {
84 struct TCGPool *next;
85 int size;
86 uint8_t data[0] __attribute__ ((aligned));
87 } TCGPool;
89 #define TCG_POOL_CHUNK_SIZE 32768
91 #define TCG_MAX_LABELS 512
93 #define TCG_MAX_TEMPS 512
95 /* when the size of the arguments of a called function is smaller than
96 this value, they are statically allocated in the TB stack frame */
97 #define TCG_STATIC_CALL_ARGS_SIZE 128
99 typedef enum TCGType {
100 TCG_TYPE_I32,
101 TCG_TYPE_I64,
102 TCG_TYPE_COUNT, /* number of different types */
104 #if TCG_TARGET_REG_BITS == 32
105 TCG_TYPE_PTR = TCG_TYPE_I32,
106 #else
107 TCG_TYPE_PTR = TCG_TYPE_I64,
108 #endif
109 #if TARGET_LONG_BITS == 64
110 TCG_TYPE_TL = TCG_TYPE_I64,
111 #else
112 TCG_TYPE_TL = TCG_TYPE_I32,
113 #endif
114 } TCGType;
116 typedef tcg_target_ulong TCGArg;
118 /* Define a type and accessor macros for varables. Using a struct is
119 nice because it gives some level of type safely. Ideally the compiler
120 be able to see through all this. However in practice this is not true,
121 expecially on targets with braindamaged ABIs (e.g. i386).
122 We use plain int by default to avoid this runtime overhead.
123 Users of tcg_gen_* don't need to know about any of this, and should
124 treat TCGv as an opaque type.
125 In additon we do typechecking for different types of variables. TCGv_i32
126 and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
127 are aliases for target_ulong and host pointer sized values respectively.
130 #ifdef CONFIG_DEBUG_TCG
131 #define DEBUG_TCGV 1
132 #endif
134 #ifdef DEBUG_TCGV
136 typedef struct
138 int i32;
139 } TCGv_i32;
141 typedef struct
143 int i64;
144 } TCGv_i64;
146 #define MAKE_TCGV_I32(i) __extension__ \
147 ({ TCGv_i32 make_tcgv_tmp = {i}; make_tcgv_tmp;})
148 #define MAKE_TCGV_I64(i) __extension__ \
149 ({ TCGv_i64 make_tcgv_tmp = {i}; make_tcgv_tmp;})
150 #define GET_TCGV_I32(t) ((t).i32)
151 #define GET_TCGV_I64(t) ((t).i64)
152 #if TCG_TARGET_REG_BITS == 32
153 #define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
154 #define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
155 #endif
157 #else /* !DEBUG_TCGV */
159 typedef int TCGv_i32;
160 typedef int TCGv_i64;
161 #define MAKE_TCGV_I32(x) (x)
162 #define MAKE_TCGV_I64(x) (x)
163 #define GET_TCGV_I32(t) (t)
164 #define GET_TCGV_I64(t) (t)
166 #if TCG_TARGET_REG_BITS == 32
167 #define TCGV_LOW(t) (t)
168 #define TCGV_HIGH(t) ((t) + 1)
169 #endif
171 #endif /* DEBUG_TCGV */
173 #define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
174 #define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
176 /* Dummy definition to avoid compiler warnings. */
177 #define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
178 #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
180 /* call flags */
181 #define TCG_CALL_TYPE_MASK 0x000f
182 #define TCG_CALL_TYPE_STD 0x0000 /* standard C call */
183 #define TCG_CALL_TYPE_REGPARM_1 0x0001 /* i386 style regparm call (1 reg) */
184 #define TCG_CALL_TYPE_REGPARM_2 0x0002 /* i386 style regparm call (2 regs) */
185 #define TCG_CALL_TYPE_REGPARM 0x0003 /* i386 style regparm call (3 regs) */
186 /* A pure function only reads its arguments and TCG global variables
187 and cannot raise exceptions. Hence a call to a pure function can be
188 safely suppressed if the return value is not used. */
189 #define TCG_CALL_PURE 0x0010
190 /* A const function only reads its arguments and does not use TCG
191 global variables. Hence a call to such a function does not
192 save TCG global variables back to their canonical location. */
193 #define TCG_CALL_CONST 0x0020
195 /* used to align parameters */
196 #define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
197 #define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
199 typedef enum {
200 TCG_COND_EQ,
201 TCG_COND_NE,
202 TCG_COND_LT,
203 TCG_COND_GE,
204 TCG_COND_LE,
205 TCG_COND_GT,
206 /* unsigned */
207 TCG_COND_LTU,
208 TCG_COND_GEU,
209 TCG_COND_LEU,
210 TCG_COND_GTU,
211 } TCGCond;
213 /* Invert the sense of the comparison. */
214 static inline TCGCond tcg_invert_cond(TCGCond c)
216 return (TCGCond)(c ^ 1);
219 /* Swap the operands in a comparison. */
220 static inline TCGCond tcg_swap_cond(TCGCond c)
222 int mask = (c < TCG_COND_LT ? 0 : c < TCG_COND_LTU ? 7 : 15);
223 return (TCGCond)(c ^ mask);
226 static inline TCGCond tcg_unsigned_cond(TCGCond c)
228 return (c >= TCG_COND_LT && c <= TCG_COND_GT ? c + 4 : c);
231 #define TEMP_VAL_DEAD 0
232 #define TEMP_VAL_REG 1
233 #define TEMP_VAL_MEM 2
234 #define TEMP_VAL_CONST 3
236 /* XXX: optimize memory layout */
237 typedef struct TCGTemp {
238 TCGType base_type;
239 TCGType type;
240 int val_type;
241 int reg;
242 tcg_target_long val;
243 int mem_reg;
244 tcg_target_long mem_offset;
245 unsigned int fixed_reg:1;
246 unsigned int mem_coherent:1;
247 unsigned int mem_allocated:1;
248 unsigned int temp_local:1; /* If true, the temp is saved accross
249 basic blocks. Otherwise, it is not
250 preserved accross basic blocks. */
251 unsigned int temp_allocated:1; /* never used for code gen */
252 /* index of next free temp of same base type, -1 if end */
253 int next_free_temp;
254 const char *name;
255 } TCGTemp;
257 typedef struct TCGHelperInfo {
258 tcg_target_ulong func;
259 const char *name;
260 } TCGHelperInfo;
262 typedef struct TCGContext TCGContext;
264 struct TCGContext {
265 uint8_t *pool_cur, *pool_end;
266 TCGPool *pool_first, *pool_current;
267 TCGLabel *labels;
268 int nb_labels;
269 TCGTemp *temps; /* globals first, temps after */
270 int nb_globals;
271 int nb_temps;
272 /* index of free temps, -1 if none */
273 int first_free_temp[TCG_TYPE_COUNT * 2];
275 /* goto_tb support */
276 uint8_t *code_buf;
277 unsigned long *tb_next;
278 uint16_t *tb_next_offset;
279 uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
281 /* liveness analysis */
282 uint16_t *op_dead_iargs; /* for each operation, each bit tells if the
283 corresponding input argument is dead */
285 /* tells in which temporary a given register is. It does not take
286 into account fixed registers */
287 int reg_to_temp[TCG_TARGET_NB_REGS];
288 TCGRegSet reserved_regs;
289 tcg_target_long current_frame_offset;
290 tcg_target_long frame_start;
291 tcg_target_long frame_end;
292 int frame_reg;
294 uint8_t *code_ptr;
295 TCGTemp static_temps[TCG_MAX_TEMPS];
297 TCGHelperInfo *helpers;
298 int nb_helpers;
299 int allocated_helpers;
300 int helpers_sorted;
302 #ifdef CONFIG_PROFILER
303 /* profiling info */
304 int64_t tb_count1;
305 int64_t tb_count;
306 int64_t op_count; /* total insn count */
307 int op_count_max; /* max insn per TB */
308 int64_t temp_count;
309 int temp_count_max;
310 int64_t del_op_count;
311 int64_t code_in_len;
312 int64_t code_out_len;
313 int64_t interm_time;
314 int64_t code_time;
315 int64_t la_time;
316 int64_t restore_count;
317 int64_t restore_time;
318 #endif
321 extern TCGContext tcg_ctx;
322 extern uint16_t *gen_opc_ptr;
323 extern TCGArg *gen_opparam_ptr;
324 extern uint16_t gen_opc_buf[];
325 extern TCGArg gen_opparam_buf[];
327 /* pool based memory allocation */
329 void *tcg_malloc_internal(TCGContext *s, int size);
330 void tcg_pool_reset(TCGContext *s);
331 void tcg_pool_delete(TCGContext *s);
333 static inline void *tcg_malloc(int size)
335 TCGContext *s = &tcg_ctx;
336 uint8_t *ptr, *ptr_end;
337 size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
338 ptr = s->pool_cur;
339 ptr_end = ptr + size;
340 if (unlikely(ptr_end > s->pool_end)) {
341 return tcg_malloc_internal(&tcg_ctx, size);
342 } else {
343 s->pool_cur = ptr_end;
344 return ptr;
348 void tcg_context_init(TCGContext *s);
349 void tcg_func_start(TCGContext *s);
351 int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf);
352 int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);
354 void tcg_set_frame(TCGContext *s, int reg,
355 tcg_target_long start, tcg_target_long size);
357 TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
358 TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
359 const char *name);
360 TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
361 static inline TCGv_i32 tcg_temp_new_i32(void)
363 return tcg_temp_new_internal_i32(0);
365 static inline TCGv_i32 tcg_temp_local_new_i32(void)
367 return tcg_temp_new_internal_i32(1);
369 void tcg_temp_free_i32(TCGv_i32 arg);
370 char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
372 TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
373 TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
374 const char *name);
375 TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
376 static inline TCGv_i64 tcg_temp_new_i64(void)
378 return tcg_temp_new_internal_i64(0);
380 static inline TCGv_i64 tcg_temp_local_new_i64(void)
382 return tcg_temp_new_internal_i64(1);
384 void tcg_temp_free_i64(TCGv_i64 arg);
385 char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
387 void tcg_dump_info(FILE *f,
388 int (*cpu_fprintf)(FILE *f, const char *fmt, ...));
390 #define TCG_CT_ALIAS 0x80
391 #define TCG_CT_IALIAS 0x40
392 #define TCG_CT_REG 0x01
393 #define TCG_CT_CONST 0x02 /* any constant of register size */
395 typedef struct TCGArgConstraint {
396 uint16_t ct;
397 uint8_t alias_index;
398 union {
399 TCGRegSet regs;
400 } u;
401 } TCGArgConstraint;
403 #define TCG_MAX_OP_ARGS 16
405 #define TCG_OPF_BB_END 0x01 /* instruction defines the end of a basic
406 block */
407 #define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers
408 and potentially update globals. */
409 #define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects : it
410 cannot be removed if its output
411 are not used */
413 typedef struct TCGOpDef {
414 const char *name;
415 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
416 uint8_t flags;
417 uint16_t copy_size;
418 TCGArgConstraint *args_ct;
419 int *sorted_args;
420 #if defined(CONFIG_DEBUG_TCG)
421 int used;
422 #endif
423 } TCGOpDef;
425 typedef struct TCGTargetOpDef {
426 TCGOpcode op;
427 const char *args_ct_str[TCG_MAX_OP_ARGS];
428 } TCGTargetOpDef;
430 void tcg_target_init(TCGContext *s);
431 void tcg_target_qemu_prologue(TCGContext *s);
433 #define tcg_abort() \
434 do {\
435 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
436 abort();\
437 } while (0)
439 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
441 #if TCG_TARGET_REG_BITS == 32
442 #define tcg_const_ptr tcg_const_i32
443 #define tcg_add_ptr tcg_add_i32
444 #define tcg_sub_ptr tcg_sub_i32
445 #define TCGv_ptr TCGv_i32
446 #define GET_TCGV_PTR GET_TCGV_I32
447 #define tcg_global_reg_new_ptr tcg_global_reg_new_i32
448 #define tcg_global_mem_new_ptr tcg_global_mem_new_i32
449 #define tcg_temp_new_ptr tcg_temp_new_i32
450 #define tcg_temp_free_ptr tcg_temp_free_i32
451 #else
452 #define tcg_const_ptr tcg_const_i64
453 #define tcg_add_ptr tcg_add_i64
454 #define tcg_sub_ptr tcg_sub_i64
455 #define TCGv_ptr TCGv_i64
456 #define GET_TCGV_PTR GET_TCGV_I64
457 #define tcg_global_reg_new_ptr tcg_global_reg_new_i64
458 #define tcg_global_mem_new_ptr tcg_global_mem_new_i64
459 #define tcg_temp_new_ptr tcg_temp_new_i64
460 #define tcg_temp_free_ptr tcg_temp_free_i64
461 #endif
463 void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
464 int sizemask, TCGArg ret, int nargs, TCGArg *args);
466 void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
467 int c, int right, int arith);
469 /* only used for debugging purposes */
470 void tcg_register_helper(void *func, const char *name);
471 const char *tcg_helper_get_name(TCGContext *s, void *func);
472 void tcg_dump_ops(TCGContext *s, FILE *outfile);
474 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
475 TCGv_i32 tcg_const_i32(int32_t val);
476 TCGv_i64 tcg_const_i64(int64_t val);
477 TCGv_i32 tcg_const_local_i32(int32_t val);
478 TCGv_i64 tcg_const_local_i64(int64_t val);
480 extern uint8_t code_gen_prologue[];
481 #if defined(_ARCH_PPC) && !defined(_ARCH_PPC64)
482 #define tcg_qemu_tb_exec(tb_ptr) \
483 ((long REGPARM __attribute__ ((longcall)) (*)(void *))code_gen_prologue)(tb_ptr)
484 #else
485 #define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM (*)(void *))code_gen_prologue)(tb_ptr)
486 #endif