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 {
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) */
166 #define TEMP_VAL_DEAD 0
167 #define TEMP_VAL_REG 1
168 #define TEMP_VAL_MEM 2
169 #define TEMP_VAL_CONST 3
171 /* XXX: optimize memory layout */
172 typedef struct TCGTemp {
179 tcg_target_long mem_offset;
180 unsigned int fixed_reg:1;
181 unsigned int mem_coherent:1;
182 unsigned int mem_allocated:1;
186 typedef struct TCGHelperInfo {
191 typedef struct TCGContext TCGContext;
193 typedef void TCGMacroFunc(TCGContext *s, int macro_id, const int *dead_args);
196 uint8_t *pool_cur, *pool_end;
197 TCGPool *pool_first, *pool_current;
200 TCGTemp *temps; /* globals first, temps after */
203 /* constant indexes (end of temp array) */
207 /* goto_tb support */
209 unsigned long *tb_next;
210 uint16_t *tb_next_offset;
211 uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
213 uint16_t *op_dead_iargs; /* for each operation, each bit tells if the
214 corresponding input argument is dead */
215 /* tells in which temporary a given register is. It does not take
216 into account fixed registers */
217 int reg_to_temp[TCG_TARGET_NB_REGS];
218 TCGRegSet reserved_regs;
219 tcg_target_long current_frame_offset;
220 tcg_target_long frame_start;
221 tcg_target_long frame_end;
225 TCGTemp static_temps[TCG_MAX_TEMPS];
227 TCGMacroFunc *macro_func;
228 TCGHelperInfo *helpers;
230 int allocated_helpers;
233 extern TCGContext tcg_ctx;
234 extern uint16_t *gen_opc_ptr;
235 extern TCGArg *gen_opparam_ptr;
236 extern uint16_t gen_opc_buf[];
237 extern TCGArg gen_opparam_buf[];
239 /* pool based memory allocation */
241 void *tcg_malloc_internal(TCGContext *s, int size);
242 void tcg_pool_reset(TCGContext *s);
243 void tcg_pool_delete(TCGContext *s);
245 static inline void *tcg_malloc(int size)
247 TCGContext *s = &tcg_ctx;
248 uint8_t *ptr, *ptr_end;
249 size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
251 ptr_end = ptr + size;
252 if (unlikely(ptr_end > s->pool_end)) {
253 return tcg_malloc_internal(&tcg_ctx, size);
255 s->pool_cur = ptr_end;
260 void tcg_context_init(TCGContext *s);
261 void tcg_func_start(TCGContext *s);
263 int dyngen_code(TCGContext *s, uint8_t *gen_code_buf);
264 int dyngen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);
266 void tcg_set_frame(TCGContext *s, int reg,
267 tcg_target_long start, tcg_target_long size);
268 void tcg_set_macro_func(TCGContext *s, TCGMacroFunc *func);
269 TCGv tcg_global_reg_new(TCGType type, int reg, const char *name);
270 TCGv tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset,
272 TCGv tcg_temp_new(TCGType type);
273 char *tcg_get_arg_str(TCGContext *s, char *buf, int buf_size, TCGv arg);
275 #define TCG_CT_ALIAS 0x80
276 #define TCG_CT_IALIAS 0x40
277 #define TCG_CT_REG 0x01
278 #define TCG_CT_CONST 0x02 /* any constant of register size */
280 typedef struct TCGArgConstraint {
288 #define TCG_MAX_OP_ARGS 16
290 #define TCG_OPF_BB_END 0x01 /* instruction defines the end of a basic
292 #define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers
293 and potentially update globals. */
294 #define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects : it
295 cannot be removed if its output
298 typedef struct TCGOpDef {
300 uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
303 TCGArgConstraint *args_ct;
307 typedef struct TCGTargetOpDef {
309 const char *args_ct_str[TCG_MAX_OP_ARGS];
312 extern TCGOpDef tcg_op_defs[];
314 void tcg_target_init(TCGContext *s);
315 void tcg_target_qemu_prologue(TCGContext *s);
317 #define tcg_abort() \
319 fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
323 void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
325 void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags,
326 unsigned int nb_rets, const TCGv *rets,
327 unsigned int nb_params, const TCGv *args1);
328 void tcg_gen_shifti_i64(TCGv ret, TCGv arg1,
329 int c, int right, int arith);
331 /* only used for debugging purposes */
332 void tcg_register_helper(void *func, const char *name);
333 #define TCG_HELPER(func) tcg_register_helper(func, #func)
334 const char *tcg_helper_get_name(TCGContext *s, void *func);
335 void tcg_dump_ops(TCGContext *s, FILE *outfile);
337 void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
338 TCGv tcg_const_i32(int32_t val);
339 TCGv tcg_const_i64(int64_t val);
341 #if TCG_TARGET_REG_BITS == 32
342 #define tcg_const_ptr tcg_const_i32
343 #define tcg_add_ptr tcg_add_i32
344 #define tcg_sub_ptr tcg_sub_i32
346 #define tcg_const_ptr tcg_const_i64
347 #define tcg_add_ptr tcg_add_i64
348 #define tcg_sub_ptr tcg_sub_i64
351 void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type,
352 int label_index, long addend);
353 void tcg_reg_alloc_start(TCGContext *s);
354 void tcg_reg_alloc_bb_end(TCGContext *s);
355 void tcg_liveness_analysis(TCGContext *s);
356 const TCGArg *tcg_gen_code_op(TCGContext *s, int opc, const TCGArg *args1,
357 unsigned int dead_iargs);
359 const TCGArg *dyngen_op(TCGContext *s, int opc, const TCGArg *opparam_ptr);
362 int64_t tcg_helper_shl_i64(int64_t arg1, int64_t arg2);
363 int64_t tcg_helper_shr_i64(int64_t arg1, int64_t arg2);
364 int64_t tcg_helper_sar_i64(int64_t arg1, int64_t arg2);
365 int64_t tcg_helper_div_i64(int64_t arg1, int64_t arg2);
366 int64_t tcg_helper_rem_i64(int64_t arg1, int64_t arg2);
367 uint64_t tcg_helper_divu_i64(uint64_t arg1, uint64_t arg2);
368 uint64_t tcg_helper_remu_i64(uint64_t arg1, uint64_t arg2);
370 extern uint8_t code_gen_prologue[];
371 #define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM (*)(void *))code_gen_prologue)(tb_ptr)