[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
#define TCG_TYPE_COUNT 2 /* number of different types */

#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 */

/* Dummy definition to avoid compiler warnings.  */
#define TCGV_UNUSED(x) x = MAKE_TCGV(-1)

/* 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;
    unsigned int temp_local:1; /* If true, the temp is saved accross
                                  basic blocks. Otherwise, it is not
                                  preserved accross basic blocks. */
    unsigned int temp_allocated:1; /* never used for code gen */
    /* index of next free temp of same base type, -1 if end */
    int next_free_temp;
    const char *name;
} TCGTemp;

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

typedef struct TCGContext TCGContext;

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;
    /* index of free temps, -1 if none */
    int first_free_temp[TCG_TYPE_COUNT * 2]; 

    /* 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 */

    /* liveness analysis */
    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];

    TCGHelperInfo *helpers;
    int nb_helpers;
    int allocated_helpers;
    int helpers_sorted;

#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);
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_internal(TCGType type, int temp_local);
static inline TCGv tcg_temp_new(TCGType type)
{
    return tcg_temp_new_internal(type, 0);
}
static inline TCGv tcg_temp_local_new(TCGType type)
{
    return tcg_temp_new_internal(type, 1);
}
void tcg_temp_free(TCGv arg);
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);
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[];
#if defined(__powerpc__) && !defined(__powerpc64__)
#define tcg_qemu_tb_exec(tb_ptr) \
    ((long REGPARM __attribute__ ((longcall)) (*)(void *))code_gen_prologue)(tb_ptr)
#else
#define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM (*)(void *))code_gen_prologue)(tb_ptr)
#endif
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
e8996ee0	101	#define TCG_TYPE_COUNT 2 /* number of different types */
c896fe29 FB	102
	103	#if TCG_TARGET_REG_BITS == 32
	104	#define TCG_TYPE_PTR TCG_TYPE_I32
	105	#else
	106	#define TCG_TYPE_PTR TCG_TYPE_I64
	107	#endif
	108
	109	typedef tcg_target_ulong TCGArg;
	110
ac56dd48 PB	111	/* Define a type and accessor macros for varables. Using a struct is
	112	nice because it gives some level of type safely. Ideally the compiler
	113	be able to see through all this. However in practice this is not true,
	114	expecially on targets with braindamaged ABIs (e.g. i386).
	115	We use plain int by default to avoid this runtime overhead.
	116	Users of tcg_gen_* don't need to know about any of this, and should
	117	treat TCGv as an opaque type. */
	118
	119	//#define DEBUG_TCGV 1
	120
	121	#ifdef DEBUG_TCGV
	122
	123	typedef struct
	124	{
	125	int n;
	126	} TCGv;
	127
	128	#define MAKE_TCGV(i) __extension__ \
	129	({ TCGv make_tcgv_tmp = {i}; make_tcgv_tmp;})
	130	#define GET_TCGV(t) ((t).n)
	131	#if TCG_TARGET_REG_BITS == 32
	132	#define TCGV_HIGH(t) MAKE_TCGV(GET_TCGV(t) + 1)
	133	#endif
	134
	135	#else /* !DEBUG_TCGV */
	136
	137	typedef int TCGv;
	138	#define MAKE_TCGV(x) (x)
	139	#define GET_TCGV(t) (t)
	140	#if TCG_TARGET_REG_BITS == 32
	141	#define TCGV_HIGH(t) ((t) + 1)
	142	#endif
	143
	144	#endif /* DEBUG_TCGV */
	145
a50f5b91 PB	146	/* Dummy definition to avoid compiler warnings. */
	147	#define TCGV_UNUSED(x) x = MAKE_TCGV(-1)
	148
c896fe29 FB	149	/* call flags */
	150	#define TCG_CALL_TYPE_MASK 0x000f
	151	#define TCG_CALL_TYPE_STD 0x0000 /* standard C call */
	152	#define TCG_CALL_TYPE_REGPARM_1 0x0001 /* i386 style regparm call (1 reg) */
	153	#define TCG_CALL_TYPE_REGPARM_2 0x0002 /* i386 style regparm call (2 regs) */
	154	#define TCG_CALL_TYPE_REGPARM 0x0003 /* i386 style regparm call (3 regs) */
c6e113f5 FB	155	/* A pure function only reads its arguments and globals variables and
	156	cannot raise exceptions. Hence a call to a pure function can be
	157	safely suppressed if the return value is not used. */
	158	#define TCG_CALL_PURE 0x0010
c896fe29	159
39cf05d3 FB	160	/* used to align parameters */
	161	#define TCG_CALL_DUMMY_TCGV MAKE_TCGV(-1)
	162	#define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
	163
c896fe29 FB	164	typedef enum {
	165	TCG_COND_EQ,
	166	TCG_COND_NE,
	167	TCG_COND_LT,
	168	TCG_COND_GE,
	169	TCG_COND_LE,
	170	TCG_COND_GT,
	171	/* unsigned */
	172	TCG_COND_LTU,
	173	TCG_COND_GEU,
	174	TCG_COND_LEU,
	175	TCG_COND_GTU,
	176	} TCGCond;
	177
	178	#define TEMP_VAL_DEAD 0
	179	#define TEMP_VAL_REG 1
	180	#define TEMP_VAL_MEM 2
	181	#define TEMP_VAL_CONST 3
	182
	183	/* XXX: optimize memory layout */
	184	typedef struct TCGTemp {
	185	TCGType base_type;
	186	TCGType type;
	187	int val_type;
	188	int reg;
	189	tcg_target_long val;
	190	int mem_reg;
	191	tcg_target_long mem_offset;
	192	unsigned int fixed_reg:1;
	193	unsigned int mem_coherent:1;
	194	unsigned int mem_allocated:1;
641d5fbe FB	195	unsigned int temp_local:1; /* If true, the temp is saved accross
	196	basic blocks. Otherwise, it is not
	197	preserved accross basic blocks. */
e8996ee0 FB	198	unsigned int temp_allocated:1; /* never used for code gen */
	199	/* index of next free temp of same base type, -1 if end */
	200	int next_free_temp;
c896fe29 FB	201	const char *name;
	202	} TCGTemp;
	203
	204	typedef struct TCGHelperInfo {
4dc81f28	205	tcg_target_ulong func;
c896fe29 FB	206	const char *name;
	207	} TCGHelperInfo;
	208
	209	typedef struct TCGContext TCGContext;
	210
c896fe29 FB	211	struct TCGContext {
	212	uint8_t pool_cur, pool_end;
	213	TCGPool pool_first, pool_current;
	214	TCGLabel *labels;
	215	int nb_labels;
	216	TCGTemp temps; / globals first, temps after */
	217	int nb_globals;
	218	int nb_temps;
641d5fbe FB	219	/* index of free temps, -1 if none */
641d5fbe FB	220	int first_free_temp[TCG_TYPE_COUNT * 2];
c896fe29 FB	221
	222	/* goto_tb support */
	223	uint8_t *code_buf;
	224	unsigned long *tb_next;
	225	uint16_t *tb_next_offset;
	226	uint16_t tb_jmp_offset; / != NULL if USE_DIRECT_JUMP */
	227
641d5fbe	228	/* liveness analysis */
c896fe29 FB	229	uint16_t op_dead_iargs; / for each operation, each bit tells if the
c896fe29 FB	230	corresponding input argument is dead */
641d5fbe	231
c896fe29 FB	232	/* tells in which temporary a given register is. It does not take
	233	into account fixed registers */
	234	int reg_to_temp[TCG_TARGET_NB_REGS];
	235	TCGRegSet reserved_regs;
	236	tcg_target_long current_frame_offset;
	237	tcg_target_long frame_start;
	238	tcg_target_long frame_end;
	239	int frame_reg;
	240
	241	uint8_t *code_ptr;
	242	TCGTemp static_temps[TCG_MAX_TEMPS];
	243
c896fe29 FB	244	TCGHelperInfo *helpers;
	245	int nb_helpers;
	246	int allocated_helpers;
e8996ee0	247	int helpers_sorted;
a23a9ec6 FB	248
	249	#ifdef CONFIG_PROFILER
	250	/* profiling info */
	251	int64_t tb_count1;
	252	int64_t tb_count;
	253	int64_t op_count; /* total insn count */
	254	int op_count_max; /* max insn per TB */
	255	int64_t temp_count;
	256	int temp_count_max;
	257	int64_t old_op_count;
	258	int64_t del_op_count;
	259	int64_t code_in_len;
	260	int64_t code_out_len;
	261	int64_t interm_time;
	262	int64_t code_time;
	263	int64_t la_time;
	264	int64_t restore_count;
	265	int64_t restore_time;
	266	#endif
c896fe29 FB	267	};
	268
	269	extern TCGContext tcg_ctx;
	270	extern uint16_t *gen_opc_ptr;
	271	extern TCGArg *gen_opparam_ptr;
	272	extern uint16_t gen_opc_buf[];
	273	extern TCGArg gen_opparam_buf[];
	274
	275	/* pool based memory allocation */
	276
	277	void tcg_malloc_internal(TCGContext s, int size);
	278	void tcg_pool_reset(TCGContext *s);
	279	void tcg_pool_delete(TCGContext *s);
	280
	281	static inline void *tcg_malloc(int size)
	282	{
	283	TCGContext *s = &tcg_ctx;
	284	uint8_t ptr, ptr_end;
	285	size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
	286	ptr = s->pool_cur;
	287	ptr_end = ptr + size;
	288	if (unlikely(ptr_end > s->pool_end)) {
	289	return tcg_malloc_internal(&tcg_ctx, size);
	290	} else {
	291	s->pool_cur = ptr_end;
	292	return ptr;
	293	}
	294	}
	295
	296	void tcg_context_init(TCGContext *s);
	297	void tcg_func_start(TCGContext *s);
	298
	299	int dyngen_code(TCGContext s, uint8_t gen_code_buf);
623e265c	300	int dyngen_code_search_pc(TCGContext s, uint8_t gen_code_buf, long offset);
c896fe29 FB	301
	302	void tcg_set_frame(TCGContext *s, int reg,
	303	tcg_target_long start, tcg_target_long size);
ac56dd48	304	TCGv tcg_global_reg_new(TCGType type, int reg, const char *name);
6a8d7b76 FB	305	TCGv tcg_global_reg2_new_hack(TCGType type, int reg1, int reg2,
6a8d7b76 FB	306	const char *name);
ac56dd48 PB	307	TCGv tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset,
ac56dd48 PB	308	const char *name);
641d5fbe FB	309	TCGv tcg_temp_new_internal(TCGType type, int temp_local);
	310	static inline TCGv tcg_temp_new(TCGType type)
	311	{
	312	return tcg_temp_new_internal(type, 0);
	313	}
	314	static inline TCGv tcg_temp_local_new(TCGType type)
	315	{
	316	return tcg_temp_new_internal(type, 1);
	317	}
e8996ee0	318	void tcg_temp_free(TCGv arg);
ac56dd48	319	char tcg_get_arg_str(TCGContext s, char *buf, int buf_size, TCGv arg);
a23a9ec6 FB	320	void tcg_dump_info(FILE *f,
a23a9ec6 FB	321	int (cpu_fprintf)(FILE f, const char *fmt, ...));
c896fe29 FB	322
	323	#define TCG_CT_ALIAS 0x80
	324	#define TCG_CT_IALIAS 0x40
	325	#define TCG_CT_REG 0x01
	326	#define TCG_CT_CONST 0x02 /* any constant of register size */
	327
	328	typedef struct TCGArgConstraint {
5ff9d6a4 FB	329	uint16_t ct;
5ff9d6a4 FB	330	uint8_t alias_index;
c896fe29 FB	331	union {
	332	TCGRegSet regs;
	333	} u;
	334	} TCGArgConstraint;
	335
	336	#define TCG_MAX_OP_ARGS 16
	337
	338	#define TCG_OPF_BB_END 0x01 /* instruction defines the end of a basic
	339	block */
b03cce8e FB	340	#define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers
	341	and potentially update globals. */
	342	#define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects : it
	343	cannot be removed if its output
	344	are not used */
c896fe29 FB	345
	346	typedef struct TCGOpDef {
	347	const char *name;
	348	uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
	349	uint8_t flags;
	350	uint16_t copy_size;
	351	TCGArgConstraint *args_ct;
	352	int *sorted_args;
	353	} TCGOpDef;
	354
	355	typedef struct TCGTargetOpDef {
	356	int op;
	357	const char *args_ct_str[TCG_MAX_OP_ARGS];
	358	} TCGTargetOpDef;
	359
	360	extern TCGOpDef tcg_op_defs[];
	361
	362	void tcg_target_init(TCGContext *s);
b03cce8e	363	void tcg_target_qemu_prologue(TCGContext *s);
c896fe29 FB	364
	365	#define tcg_abort() \
	366	do {\
	367	fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
	368	abort();\
	369	} while (0)
	370
	371	void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
	372
ac56dd48 PB	373	void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags,
	374	unsigned int nb_rets, const TCGv *rets,
	375	unsigned int nb_params, const TCGv *args1);
	376	void tcg_gen_shifti_i64(TCGv ret, TCGv arg1,
c896fe29 FB	377	int c, int right, int arith);
	378
	379	/* only used for debugging purposes */
	380	void tcg_register_helper(void func, const char name);
	381	#define TCG_HELPER(func) tcg_register_helper(func, #func)
	382	const char tcg_helper_get_name(TCGContext s, void *func);
	383	void tcg_dump_ops(TCGContext s, FILE outfile);
	384
	385	void dump_ops(const uint16_t opc_buf, const TCGArg opparam_buf);
ac56dd48 PB	386	TCGv tcg_const_i32(int32_t val);
ac56dd48 PB	387	TCGv tcg_const_i64(int64_t val);
c896fe29 FB	388
	389	#if TCG_TARGET_REG_BITS == 32
	390	#define tcg_const_ptr tcg_const_i32
	391	#define tcg_add_ptr tcg_add_i32
	392	#define tcg_sub_ptr tcg_sub_i32
	393	#else
	394	#define tcg_const_ptr tcg_const_i64
	395	#define tcg_add_ptr tcg_add_i64
	396	#define tcg_sub_ptr tcg_sub_i64
	397	#endif
	398
	399	void tcg_out_reloc(TCGContext s, uint8_t code_ptr, int type,
	400	int label_index, long addend);
c896fe29 FB	401	const TCGArg tcg_gen_code_op(TCGContext s, int opc, const TCGArg *args1,
	402	unsigned int dead_iargs);
	403
	404	const TCGArg dyngen_op(TCGContext s, int opc, const TCGArg *opparam_ptr);
	405
	406	/* tcg-runtime.c */
	407	int64_t tcg_helper_shl_i64(int64_t arg1, int64_t arg2);
	408	int64_t tcg_helper_shr_i64(int64_t arg1, int64_t arg2);
	409	int64_t tcg_helper_sar_i64(int64_t arg1, int64_t arg2);
	410	int64_t tcg_helper_div_i64(int64_t arg1, int64_t arg2);
	411	int64_t tcg_helper_rem_i64(int64_t arg1, int64_t arg2);
	412	uint64_t tcg_helper_divu_i64(uint64_t arg1, uint64_t arg2);
	413	uint64_t tcg_helper_remu_i64(uint64_t arg1, uint64_t arg2);
b03cce8e FB	414
b03cce8e FB	415	extern uint8_t code_gen_prologue[];
a69abbe0	416	#if defined(__powerpc__) && !defined(__powerpc64__)
932a6909 FB	417	#define tcg_qemu_tb_exec(tb_ptr) \
	418	((long REGPARM __attribute__ ((longcall)) ()(void ))code_gen_prologue)(tb_ptr)
	419	#else
b03cce8e	420	#define tcg_qemu_tb_exec(tb_ptr) ((long REGPARM ()(void ))code_gen_prologue)(tb_ptr)
932a6909	421	#endif