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
24 #include "tcg-target.h"
26 #if TCG_TARGET_REG_BITS == 32
27 typedef int32_t tcg_target_long;
28 typedef uint32_t tcg_target_ulong;
29 #define TCG_PRIlx PRIx32
30 #define TCG_PRIld PRId32
31 #elif TCG_TARGET_REG_BITS == 64
32 typedef int64_t tcg_target_long;
33 typedef uint64_t tcg_target_ulong;
34 #define TCG_PRIlx PRIx64
35 #define TCG_PRIld PRId64
40 #if TCG_TARGET_NB_REGS <= 32
41 typedef uint32_t TCGRegSet;
42 #elif TCG_TARGET_NB_REGS <= 64
43 typedef uint64_t TCGRegSet;
49 #define DEF(s, n, copy_size) INDEX_op_ ## s,
55 #define tcg_regset_clear(d) (d) = 0
56 #define tcg_regset_set(d, s) (d) = (s)
57 #define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
58 #define tcg_regset_set_reg(d, r) (d) |= 1 << (r)
59 #define tcg_regset_reset_reg(d, r) (d) &= ~(1 << (r))
60 #define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
61 #define tcg_regset_or(d, a, b) (d) = (a) | (b)
62 #define tcg_regset_and(d, a, b) (d) = (a) & (b)
63 #define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
64 #define tcg_regset_not(d, a) (d) = ~(a)
66 typedef struct TCGRelocation {
67 struct TCGRelocation *next;
70 tcg_target_long addend;
73 typedef struct TCGLabel {
76 tcg_target_ulong value;
77 TCGRelocation *first_reloc;
81 typedef struct TCGPool {
84 uint8_t data[0] __attribute__ ((aligned));
87 #define TCG_POOL_CHUNK_SIZE 32768
89 #define TCG_MAX_LABELS 512
91 #define TCG_MAX_TEMPS 512
93 /* when the size of the arguments of a called function is smaller than
94 this value, they are statically allocated in the TB stack frame */
95 #define TCG_STATIC_CALL_ARGS_SIZE 128
99 #define TCG_TYPE_I32 0
100 #define TCG_TYPE_I64 1
102 #if TCG_TARGET_REG_BITS == 32
103 #define TCG_TYPE_PTR TCG_TYPE_I32
105 #define TCG_TYPE_PTR TCG_TYPE_I64
108 typedef tcg_target_ulong TCGArg;
110 /* Define a type and accessor macros for varables. Using a struct is
111 nice because it gives some level of type safely. Ideally the compiler
112 be able to see through all this. However in practice this is not true,
113 expecially on targets with braindamaged ABIs (e.g. i386).
114 We use plain int by default to avoid this runtime overhead.
115 Users of tcg_gen_* don't need to know about any of this, and should
116 treat TCGv as an opaque type. */
118 //#define DEBUG_TCGV 1
127 #define MAKE_TCGV(i) __extension__ \
128 ({ TCGv make_tcgv_tmp = {i}; make_tcgv_tmp;})
129 #define GET_TCGV(t) ((t).n)
130 #if TCG_TARGET_REG_BITS == 32
131 #define TCGV_HIGH(t) MAKE_TCGV(GET_TCGV(t) + 1)
134 #else /* !DEBUG_TCGV */
137 #define MAKE_TCGV(x) (x)
138 #define GET_TCGV(t) (t)
139 #if TCG_TARGET_REG_BITS == 32
140 #define TCGV_HIGH(t) ((t) + 1)
143 #endif /* DEBUG_TCGV */
146 #define TCG_CALL_TYPE_MASK 0x000f
147 #define TCG_CALL_TYPE_STD 0x0000 /* standard C call */
148 #define TCG_CALL_TYPE_REGPARM_1 0x0001 /* i386 style regparm call (1 reg) */
149 #define TCG_CALL_TYPE_REGPARM_2 0x0002 /* i386 style regparm call (2 regs) */
150 #define TCG_CALL_TYPE_REGPARM 0x0003 /* i386 style regparm call (3 regs) */
151 /* A pure function only reads its arguments and globals variables and
152 cannot raise exceptions. Hence a call to a pure function can be
153 safely suppressed if the return value is not used. */
154 #define TCG_CALL_PURE 0x0010
156 /* used to align parameters */
157 #define TCG_CALL_DUMMY_TCGV MAKE_TCGV(-1)
158 #define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
174 #define TEMP_VAL_DEAD 0
175 #define TEMP_VAL_REG 1
176 #define TEMP_VAL_MEM 2
177 #define TEMP_VAL_CONST 3
179 /* XXX: optimize memory layout */
180 typedef struct TCGTemp {
187 tcg_target_long mem_offset;
188 unsigned int fixed_reg:1;
189 unsigned int mem_coherent:1;
190 unsigned int mem_allocated:1;
194 typedef struct TCGHelperInfo {
199 typedef struct TCGContext TCGContext;
201 typedef void TCGMacroFunc(TCGContext *s, int macro_id, const int *dead_args);
204 uint8_t *pool_cur, *pool_end;
205 TCGPool *pool_first, *pool_current;
208 TCGTemp *temps; /* globals first, temps after */
211 /* constant indexes (end of temp array) */
215 /* goto_tb support */
217 unsigned long *tb_next;
218 uint16_t *tb_next_offset;
219 uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
221 uint16_t *op_dead_iargs; /* for each operation, each bit tells if the
222 corresponding input argument is dead */
223 /* tells in which temporary a given register is. It does not take
224 into account fixed registers */
225 int reg_to_temp[TCG_TARGET_NB_REGS];
226 TCGRegSet reserved_regs;
227 tcg_target_long current_frame_offset;
228 tcg_target_long frame_start;
229 tcg_target_long frame_end;
233 TCGTemp static_temps[TCG_MAX_TEMPS];
235 TCGMacroFunc *macro_func;
236 TCGHelperInfo *helpers;
238 int allocated_helpers;
241 extern TCGContext tcg_ctx;
242 extern uint16_t *gen_opc_ptr;
243 extern TCGArg *gen_opparam_ptr;
244 extern uint16_t gen_opc_buf[];
245 extern TCGArg gen_opparam_buf[];
247 /* pool based memory allocation */
249 void *tcg_malloc_internal(TCGContext *s, int size);
250 void tcg_pool_reset(TCGContext *s);
251 void tcg_pool_delete(TCGContext *s);
253 static inline void *tcg_malloc(int size)
255 TCGContext *s = &tcg_ctx;
256 uint8_t *ptr, *ptr_end;
257 size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
259 ptr_end = ptr + size;
260 if (unlikely(ptr_end > s->pool_end)) {
261 return tcg_malloc_internal(&tcg_ctx, size);
263 s->pool_cur = ptr_end;
268 void tcg_context_init(TCGContext *s);
269 void tcg_func_start(TCGContext *s);
271 int dyngen_code(TCGContext *s, uint8_t *gen_code_buf);
272 int dyngen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);
274 void tcg_set_frame(TCGContext *s, int reg,
275 tcg_target_long start, tcg_target_long size);
276 void tcg_set_macro_func(TCGContext *s, TCGMacroFunc *func);
277 TCGv tcg_global_reg_new(TCGType type, int reg, const char *name);
278 TCGv tcg_global_reg2_new_hack(TCGType type, int reg1, int reg2,
280 TCGv tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset,
282 TCGv tcg_temp_new(TCGType type);
283 char *tcg_get_arg_str(TCGContext *s, char *buf, int buf_size, TCGv arg);
285 #define TCG_CT_ALIAS 0x80
286 #define TCG_CT_IALIAS 0x40
287 #define TCG_CT_REG 0x01
288 #define TCG_CT_CONST 0x02 /* any constant of register size */
290 typedef struct TCGArgConstraint {
298 #define TCG_MAX_OP_ARGS 16
300 #define TCG_OPF_BB_END 0x01 /* instruction defines the end of a basic
302 #define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers
303 and potentially update globals. */
304 #define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects : it
305 cannot be removed if its output
308 typedef struct TCGOpDef {
310 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
313 TCGArgConstraint *args_ct;
317 typedef struct TCGTargetOpDef {
319 const char *args_ct_str[TCG_MAX_OP_ARGS];
322 extern TCGOpDef tcg_op_defs[];
324 void tcg_target_init(TCGContext *s);
325 void tcg_target_qemu_prologue(TCGContext *s);
327 #define tcg_abort() \
329 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
333 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
335 void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags,
336 unsigned int nb_rets, const TCGv *rets,
337 unsigned int nb_params, const TCGv *args1);
338 void tcg_gen_shifti_i64(TCGv ret, TCGv arg1,
339 int c, int right, int arith);
341 /* only used for debugging purposes */
342 void tcg_register_helper(void *func, const char *name);
343 #define TCG_HELPER(func) tcg_register_helper(func, #func)
344 const char *tcg_helper_get_name(TCGContext *s, void *func);
345 void tcg_dump_ops(TCGContext *s, FILE *outfile);
347 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
348 TCGv tcg_const_i32(int32_t val);
349 TCGv tcg_const_i64(int64_t val);
351 #if TCG_TARGET_REG_BITS == 32
352 #define tcg_const_ptr tcg_const_i32
353 #define tcg_add_ptr tcg_add_i32
354 #define tcg_sub_ptr tcg_sub_i32
356 #define tcg_const_ptr tcg_const_i64
357 #define tcg_add_ptr tcg_add_i64
358 #define tcg_sub_ptr tcg_sub_i64
361 void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type,
362 int label_index, long addend);
363 void tcg_reg_alloc_start(TCGContext *s);
364 void tcg_reg_alloc_bb_end(TCGContext *s);
365 void tcg_liveness_analysis(TCGContext *s);
366 const TCGArg *tcg_gen_code_op(TCGContext *s, int opc, const TCGArg *args1,
367 unsigned int dead_iargs);
369 const TCGArg *dyngen_op(TCGContext *s, int opc, const TCGArg *opparam_ptr);
372 int64_t tcg_helper_shl_i64(int64_t arg1, int64_t arg2);
373 int64_t tcg_helper_shr_i64(int64_t arg1, int64_t arg2);
374 int64_t tcg_helper_sar_i64(int64_t arg1, int64_t arg2);
375 int64_t tcg_helper_div_i64(int64_t arg1, int64_t arg2);
376 int64_t tcg_helper_rem_i64(int64_t arg1, int64_t arg2);
377 uint64_t tcg_helper_divu_i64(uint64_t arg1, uint64_t arg2);
378 uint64_t tcg_helper_remu_i64(uint64_t arg1, uint64_t arg2);
380 extern uint8_t code_gen_prologue[];
381 #define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM (*)(void *))code_gen_prologue)(tb_ptr)