[mirror_qemu.git] / tcg / tcg.h

/*
 * 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] __attribute__ ((aligned));
} TCGPool;

#define TCG_POOL_CHUNK_SIZE 32768

#define TCG_MAX_LABELS 512

#define TCG_MAX_TEMPS 512

/* 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

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) */
/* A pure function only reads its arguments and globals variables and
   cannot raise exceptions. Hence a call to a pure function can be
   safely suppressed if the return value is not used. */
#define TCG_CALL_PURE           0x0010 

/* used to align parameters */
#define TCG_CALL_DUMMY_TCGV     MAKE_TCGV(-1)
#define TCG_CALL_DUMMY_ARG      ((TCGArg)(-1))

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 {
    tcg_target_ulong 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;

#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 old_op_count;
    int64_t del_op_count;
    int64_t code_in_len;
    int64_t code_out_len;
    int64_t interm_time;
    int64_t code_time;
    int64_t la_time;
    int64_t restore_count;
    int64_t restore_time;
#endif
};

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_reg2_new_hack(TCGType type, int reg1, int reg2, 
                              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);
void tcg_dump_info(FILE *f,
                   int (*cpu_fprintf)(FILE *f, const char *fmt, ...));

#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 
                                   and potentially update globals. */
#define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects : it
                                     cannot be removed if its output
                                     are not used */

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);
void tcg_target_qemu_prologue(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);

extern uint8_t code_gen_prologue[];
#define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM (*)(void *))code_gen_prologue)(tb_ptr)
Commit	Line	Data
c896fe29 FB	1	/*
	2	* Tiny Code Generator for QEMU
	3	*
	4	* Copyright (c) 2008 Fabrice Bellard
	5	*
	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:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	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.
	23	*/
	24	#include "tcg-target.h"
	25
	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
	36	#else
	37	#error unsupported
	38	#endif
	39
	40	#if TCG_TARGET_NB_REGS <= 32
	41	typedef uint32_t TCGRegSet;
	42	#elif TCG_TARGET_NB_REGS <= 64
	43	typedef uint64_t TCGRegSet;
	44	#else
	45	#error unsupported
	46	#endif
	47
	48	enum {
	49	#define DEF(s, n, copy_size) INDEX_op_ ## s,
	50	#include "tcg-opc.h"
	51	#undef DEF
	52	NB_OPS,
	53	};
	54
	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)
65
66	typedef struct TCGRelocation {
67	struct TCGRelocation *next;
68	int type;
69	uint8_t *ptr;
70	tcg_target_long addend;
71	} TCGRelocation;
72
73	typedef struct TCGLabel {
c44f945a	74	int has_value;
c896fe29 FB	75	union {
	76	tcg_target_ulong value;
	77	TCGRelocation *first_reloc;
	78	} u;
	79	} TCGLabel;
	80
	81	typedef struct TCGPool {
	82	struct TCGPool *next;
c44f945a BS	83	int size;
c44f945a BS	84	uint8_t data[0] __attribute__ ((aligned));
c896fe29 FB	85	} TCGPool;
	86
	87	#define TCG_POOL_CHUNK_SIZE 32768
	88
	89	#define TCG_MAX_LABELS 512
	90
c4071c90	91	#define TCG_MAX_TEMPS 512
c896fe29	92
b03cce8e FB	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
	96
c896fe29 FB	97	typedef int TCGType;
	98
	99	#define TCG_TYPE_I32 0
	100	#define TCG_TYPE_I64 1
	101
	102	#if TCG_TARGET_REG_BITS == 32
	103	#define TCG_TYPE_PTR TCG_TYPE_I32
	104	#else
	105	#define TCG_TYPE_PTR TCG_TYPE_I64
	106	#endif
	107
	108	typedef tcg_target_ulong TCGArg;
	109
ac56dd48 PB	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. */
	117
	118	//#define DEBUG_TCGV 1
	119
	120	#ifdef DEBUG_TCGV
	121
	122	typedef struct
	123	{
	124	int n;
	125	} TCGv;
	126
	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)
	132	#endif
	133
	134	#else /* !DEBUG_TCGV */
	135
	136	typedef int 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)
	141	#endif
	142
	143	#endif /* DEBUG_TCGV */
	144
c896fe29 FB	145	/* call flags */
	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) */
c6e113f5 FB	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
c896fe29	155
39cf05d3 FB	156	/* used to align parameters */
	157	#define TCG_CALL_DUMMY_TCGV MAKE_TCGV(-1)
	158	#define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
	159
c896fe29 FB	160	typedef enum {
	161	TCG_COND_EQ,
	162	TCG_COND_NE,
	163	TCG_COND_LT,
	164	TCG_COND_GE,
	165	TCG_COND_LE,
	166	TCG_COND_GT,
	167	/* unsigned */
	168	TCG_COND_LTU,
	169	TCG_COND_GEU,
	170	TCG_COND_LEU,
	171	TCG_COND_GTU,
	172	} TCGCond;
	173
	174	#define TEMP_VAL_DEAD 0
	175	#define TEMP_VAL_REG 1
	176	#define TEMP_VAL_MEM 2
	177	#define TEMP_VAL_CONST 3
	178
	179	/* XXX: optimize memory layout */
	180	typedef struct TCGTemp {
	181	TCGType base_type;
	182	TCGType type;
	183	int val_type;
	184	int reg;
	185	tcg_target_long val;
	186	int mem_reg;
	187	tcg_target_long mem_offset;
	188	unsigned int fixed_reg:1;
	189	unsigned int mem_coherent:1;
	190	unsigned int mem_allocated:1;
	191	const char *name;
	192	} TCGTemp;
	193
	194	typedef struct TCGHelperInfo {
4dc81f28	195	tcg_target_ulong func;
c896fe29 FB	196	const char *name;
	197	} TCGHelperInfo;
	198
	199	typedef struct TCGContext TCGContext;
	200
	201	typedef void TCGMacroFunc(TCGContext s, int macro_id, const int dead_args);
	202
	203	struct TCGContext {
	204	uint8_t pool_cur, pool_end;
	205	TCGPool pool_first, pool_current;
	206	TCGLabel *labels;
	207	int nb_labels;
	208	TCGTemp temps; / globals first, temps after */
	209	int nb_globals;
	210	int nb_temps;
	211	/* constant indexes (end of temp array) */
	212	int const_start;
	213	int const_end;
	214
	215	/* goto_tb support */
	216	uint8_t *code_buf;
	217	unsigned long *tb_next;
	218	uint16_t *tb_next_offset;
	219	uint16_t tb_jmp_offset; / != NULL if USE_DIRECT_JUMP */
	220
	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;
	230	int frame_reg;
	231
	232	uint8_t *code_ptr;
	233	TCGTemp static_temps[TCG_MAX_TEMPS];
	234
	235	TCGMacroFunc *macro_func;
	236	TCGHelperInfo *helpers;
	237	int nb_helpers;
	238	int allocated_helpers;
a23a9ec6 FB	239
	240	#ifdef CONFIG_PROFILER
	241	/* profiling info */
	242	int64_t tb_count1;
	243	int64_t tb_count;
	244	int64_t op_count; /* total insn count */
	245	int op_count_max; /* max insn per TB */
	246	int64_t temp_count;
	247	int temp_count_max;
	248	int64_t old_op_count;
	249	int64_t del_op_count;
	250	int64_t code_in_len;
	251	int64_t code_out_len;
	252	int64_t interm_time;
	253	int64_t code_time;
	254	int64_t la_time;
	255	int64_t restore_count;
	256	int64_t restore_time;
	257	#endif
c896fe29 FB	258	};
	259
	260	extern TCGContext tcg_ctx;
	261	extern uint16_t *gen_opc_ptr;
	262	extern TCGArg *gen_opparam_ptr;
	263	extern uint16_t gen_opc_buf[];
	264	extern TCGArg gen_opparam_buf[];
	265
	266	/* pool based memory allocation */
	267
	268	void tcg_malloc_internal(TCGContext s, int size);
	269	void tcg_pool_reset(TCGContext *s);
	270	void tcg_pool_delete(TCGContext *s);
	271
	272	static inline void *tcg_malloc(int size)
	273	{
	274	TCGContext *s = &tcg_ctx;
	275	uint8_t ptr, ptr_end;
	276	size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
	277	ptr = s->pool_cur;
	278	ptr_end = ptr + size;
	279	if (unlikely(ptr_end > s->pool_end)) {
	280	return tcg_malloc_internal(&tcg_ctx, size);
	281	} else {
	282	s->pool_cur = ptr_end;
	283	return ptr;
	284	}
	285	}
	286
	287	void tcg_context_init(TCGContext *s);
	288	void tcg_func_start(TCGContext *s);
	289
	290	int dyngen_code(TCGContext s, uint8_t gen_code_buf);
623e265c	291	int dyngen_code_search_pc(TCGContext s, uint8_t gen_code_buf, long offset);
c896fe29 FB	292
	293	void tcg_set_frame(TCGContext *s, int reg,
	294	tcg_target_long start, tcg_target_long size);
	295	void tcg_set_macro_func(TCGContext s, TCGMacroFunc func);
ac56dd48	296	TCGv tcg_global_reg_new(TCGType type, int reg, const char *name);
6a8d7b76 FB	297	TCGv tcg_global_reg2_new_hack(TCGType type, int reg1, int reg2,
6a8d7b76 FB	298	const char *name);
ac56dd48 PB	299	TCGv tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset,
	300	const char *name);
	301	TCGv tcg_temp_new(TCGType type);
	302	char tcg_get_arg_str(TCGContext s, char *buf, int buf_size, TCGv arg);
a23a9ec6 FB	303	void tcg_dump_info(FILE *f,
a23a9ec6 FB	304	int (cpu_fprintf)(FILE f, const char *fmt, ...));
c896fe29 FB	305
	306	#define TCG_CT_ALIAS 0x80
	307	#define TCG_CT_IALIAS 0x40
	308	#define TCG_CT_REG 0x01
	309	#define TCG_CT_CONST 0x02 /* any constant of register size */
	310
	311	typedef struct TCGArgConstraint {
5ff9d6a4 FB	312	uint16_t ct;
5ff9d6a4 FB	313	uint8_t alias_index;
c896fe29 FB	314	union {
	315	TCGRegSet regs;
	316	} u;
	317	} TCGArgConstraint;
	318
	319	#define TCG_MAX_OP_ARGS 16
	320
	321	#define TCG_OPF_BB_END 0x01 /* instruction defines the end of a basic
	322	block */
b03cce8e FB	323	#define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers
	324	and potentially update globals. */
	325	#define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects : it
	326	cannot be removed if its output
	327	are not used */
c896fe29 FB	328
	329	typedef struct TCGOpDef {
	330	const char *name;
	331	uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
	332	uint8_t flags;
	333	uint16_t copy_size;
	334	TCGArgConstraint *args_ct;
	335	int *sorted_args;
	336	} TCGOpDef;
	337
	338	typedef struct TCGTargetOpDef {
	339	int op;
	340	const char *args_ct_str[TCG_MAX_OP_ARGS];
	341	} TCGTargetOpDef;
	342
	343	extern TCGOpDef tcg_op_defs[];
	344
	345	void tcg_target_init(TCGContext *s);
b03cce8e	346	void tcg_target_qemu_prologue(TCGContext *s);
c896fe29 FB	347
	348	#define tcg_abort() \
	349	do {\
	350	fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
	351	abort();\
	352	} while (0)
	353
	354	void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
	355
ac56dd48 PB	356	void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags,
	357	unsigned int nb_rets, const TCGv *rets,
	358	unsigned int nb_params, const TCGv *args1);
	359	void tcg_gen_shifti_i64(TCGv ret, TCGv arg1,
c896fe29 FB	360	int c, int right, int arith);
	361
	362	/* only used for debugging purposes */
	363	void tcg_register_helper(void func, const char name);
	364	#define TCG_HELPER(func) tcg_register_helper(func, #func)
	365	const char tcg_helper_get_name(TCGContext s, void *func);
	366	void tcg_dump_ops(TCGContext s, FILE outfile);
	367
	368	void dump_ops(const uint16_t opc_buf, const TCGArg opparam_buf);
ac56dd48 PB	369	TCGv tcg_const_i32(int32_t val);
ac56dd48 PB	370	TCGv tcg_const_i64(int64_t val);
c896fe29 FB	371
	372	#if TCG_TARGET_REG_BITS == 32
	373	#define tcg_const_ptr tcg_const_i32
	374	#define tcg_add_ptr tcg_add_i32
	375	#define tcg_sub_ptr tcg_sub_i32
	376	#else
	377	#define tcg_const_ptr tcg_const_i64
	378	#define tcg_add_ptr tcg_add_i64
	379	#define tcg_sub_ptr tcg_sub_i64
	380	#endif
	381
	382	void tcg_out_reloc(TCGContext s, uint8_t code_ptr, int type,
	383	int label_index, long addend);
	384	void tcg_reg_alloc_start(TCGContext *s);
	385	void tcg_reg_alloc_bb_end(TCGContext *s);
	386	void tcg_liveness_analysis(TCGContext *s);
	387	const TCGArg tcg_gen_code_op(TCGContext s, int opc, const TCGArg *args1,
	388	unsigned int dead_iargs);
	389
	390	const TCGArg dyngen_op(TCGContext s, int opc, const TCGArg *opparam_ptr);
	391
	392	/* tcg-runtime.c */
	393	int64_t tcg_helper_shl_i64(int64_t arg1, int64_t arg2);
	394	int64_t tcg_helper_shr_i64(int64_t arg1, int64_t arg2);
	395	int64_t tcg_helper_sar_i64(int64_t arg1, int64_t arg2);
	396	int64_t tcg_helper_div_i64(int64_t arg1, int64_t arg2);
	397	int64_t tcg_helper_rem_i64(int64_t arg1, int64_t arg2);
	398	uint64_t tcg_helper_divu_i64(uint64_t arg1, uint64_t arg2);
	399	uint64_t tcg_helper_remu_i64(uint64_t arg1, uint64_t arg2);
b03cce8e FB	400
	401	extern uint8_t code_gen_prologue[];
	402	#define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM ()(void ))code_gen_prologue)(tb_ptr)